JPH0433703B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Purpose of the Invention (Industrial Field of Application) The present invention is intended for use in packaging machines for fresh foods, for example, by forming perforations in the width direction at every predetermined length of a strip-shaped packaging film. While the film is being transported toward the packaging section, a brake is applied to the film and the film is pulled in the transport direction by the transport force.
The present invention relates to a packaging film conveying device that cuts the film at the perforations and stretches the film of a predetermined length onto a packaging section.

(Prior art) Conventionally, as this type of conveying device,
There is one described in Publication No. 90499. In this device, a perforation machine is installed on the film supply side of the conveying device that transports the packaging film to the packaging section, and uses the upward motion of a saw blade to form perforations in the width direction of the strip-shaped packaging film at intervals of a certain length. A perforation forming mechanism, a pair of upper and lower roller shafts that sandwich the perforated band-shaped packaging film, and the rotation of the roller shaft is stopped when the perforation crosses the roller shaft toward the packaging section, and the conveyance is carried out. A brake mechanism is provided which pulls the belt-shaped packaging film using the conveying force of the device and cuts it at the perforations.

This film conveying action will be explained in detail with reference to FIGS. 21 and 22. When packaging with a short film F (film length FL ₁ ) as shown in FIG. 21 A, B, C, and D, the head F of the film F located at the supply port P as shown in FIG. ₁ always stops at the indexing dimension P ₁ from the roller shafts 15 and 4. Film F
While the film head F ₁ is being transported toward the packaging section S, the perforation forming mechanism 43 creates perforations B in the width direction every predetermined length FL ₁ of the film F, as shown in FIG. 21B. is formed. after that,
As shown in FIG. 2, FIG.
When the roller shafts 15 and 4 have exceeded _P1 , the brakes are applied to the roller shafts 15 and 4, and the film F held between the roller shafts 15 and 4 is pulled in the transport direction A. Due to this tensile force, the film F is cut at the perforation B as shown in FIG.
Set to 1. Further, the head _F1 of the film F held between the roller shafts 15 and 4 is stopped at the head position _P1 as in FIG. 21A.

On the other hand, even when packaging with a long film F (film length FL ₂ ) as shown in FIG. The head F ₂ always stops at the starting distance P ₂ from the roller shafts 15, 4. This indexing dimension _P2 is the same as the indexing dimension _P1 .

After that, it is conveyed by the same operation as in the case of FIG. 21 A, B, C, and D.

(Problem to be Solved by the Invention) However, when comparing the two, since the beginning dimensions P ₁ and P ₂ are the same in both, the transport distance of the beginning F ₂ of the film F shown in FIG. G2 is the transport distance _G1 of the head F1 of the film F shown in FIG.
, half the difference in film length (FL ₂ −
FL ₁ )/2 becomes larger. Therefore, when the transport speeds are the same, comparing the stop timings T1 and T2 of the film F in the packaging section S, it is natural that T1<T2.

In other words, the film F is always placed in the packaging section S.
When setting the film at the center S1, the longer the film F is, the longer the film transport time will be. Therefore,
Even if other packaging conditions are the same, the overall packaging process time is unfavorably influenced by the film lengths FL ₁ and FL ₂ .

Therefore, considering that the optimum film length varies depending on the width and height of the item, it is possible to change the cueing dimension according to the width and height of the item, that is, according to the film length. Accordingly, the present invention aims to improve the efficiency of film feeding by making it possible to shorten the film transport time.

Structure of the Invention (Means and Effects for Solving the Problems) That is, the first invention is directed to a film feeding device 1A of a main conveying device 1A that conveys a packaging film F to a packaging section S, as shown in the drawings of embodiments to be described later. A braking device 1B is attached to the side and applies a brake to a band-shaped packaging film F in which perforations B in the width direction are formed at every predetermined length FL, and an unwrapped item W is sent to the packaging section S. Sometimes band-shaped packaging film F
storage means 172 for storing in advance drive timings TB and TC for activating the braking device 1B after driving the main conveyance device 1A according to the width L in the left-right direction of the article W along the conveyance direction A; Item width detection means 1 for detecting the horizontal width L of
53, an indexing means 171 for calculating the horizontal width L of the article W based on the detection signal from the article width detecting means 153, and an indexing means 171 for calculating the horizontal width L of the article W calculated by the indexing means 171; The drive timings TB and TC of the braking device 1B are read from the storage means 172, and the drive timings TB and TC of the braking device 1B are read from the storage means 172 and
It is equipped with a drive control means 171 that operates the braking device 1B at TB and TC.

The film transport device according to the first invention operates, for example, as follows. That is, the heads F1 and F2 of the packaging film F located at the film supply port P of the main transport device 1A are transported toward the packaging section S of the main transport device 1A by the drive of the main transport device 1A. After that, the perforation B of the film F is connected to the braking device 1 on the supply side of the main conveying device 1A.
The same device 1A goes beyond the brake action parts 15 and 4 of B.
When the packaging film F is located at the film supply port P, that is, at the drive timing TB, the brakes are applied to the braking units 15 and 4, and the packaging film F is pulled in the transport direction A by the transport force of the main transport device 1A. Due to the tensile force of the lever, the packaging film F cut at the perforations and separated is further transported toward the packaging section S of the main transport device 1A, and the head F of the remaining packaging film F is
1 and F2 stop at the film supply port P. Next, before the separated packaging film F stops at the packaging section S of the main conveyance device 1A, that is, at the drive timing TC, the brakes by the braking units 15 and 4 of the braking device 1B are released, The heads F ₁ and F ₂ of the packaging film F, which had been stopped at the film supply port P of the main conveyance device 1A, are fed out in the conveyance direction A by the brake action units 15 and 4 by the conveyance force of the main conveyance device 1A.
Thereafter, the separated packaging film F is stopped at the packaging section S by stopping the drive of the main conveyance device 1A, and the heads F ₁ and F ₂ of the unwound packaging film F are also stopped at the same time.

In addition, as shown in the drawings of the embodiment which will be described later, the second invention is also provided on the film supply side of the main conveyance device 1A that conveys the packaging film F to the packaging section S, and is provided with A braking device 1B that applies a brake to a band-shaped packaging film F on which perforations B are formed, and a height H of an unwrapped item W.
drive timing TB for operating the braking device 1B after driving the main conveyance device 1A,
A storage means 172 for storing TC in advance, an article height detection means 130 for detecting the height H of the unpackaged article W, and a height of the article W based on a detection signal from the article height detection means 130. An indexing means 171 for calculating H, and a storage means 172 for driving timings TB and TC of the braking device 1B with respect to the height H of the article W calculated by the indexing means 171.
The drive control means 171 reads the information from the drive timings TB and TC and operates the braking device 1B at the drive timings TB and TC.

The operation of the second invention is the same as that of the first invention, except that the drive timings TB and TC of the braking device 1B are set according to the height H of the article W.

(Example) Hereinafter, a case where a packaging film conveying device according to an example of the present invention is used in a packaging machine for fresh food will be described with reference to the drawings.

1 in Fig. 1 indicates a packaging film conveying device installed on the upper part of the machine frame, and as shown in Figs. 2 and 3,
On one side between the front and rear fixed frames 2, two roller shafts 3, 4 and a driven shaft 5 are rotatably installed from the outside, and a pair of upper and lower shafts 6, 7 are fixed, while on the other side. A pair of upper and lower shafts 10 and 11 are fixed. Reference numeral 12 denotes a pair of opening/closing frames supported rotatably in the vertical direction on both front and rear ends of the shaft 6, extending from the support shaft 6 to above the roller shaft 3, and extending from the ends of the opening/closing frames 12. A support frame 13 having a handle 14 is fixed between the parts, and a roller shaft 15 is rotatably installed on the base end side of the support frame 13, and a shaft 16 is fixed thereto.

In FIG. 3, 18 is the pair of upper and lower shafts 16,
A pair of upper and lower rollers 19 are rotatably supported on the front side of the pair of upper and lower shafts 6 and 7, and 19 is a pair of upper and lower rollers that are rotatably supported on the front side of the pair of upper and lower shafts 6 and 7. 2 on the rear side between 18 and 19
An endless round belt 20 for books is stretched around, and one endless round belt 20 is stretched between the lower rollers 18 and 19 so as to be interposed between the two round belts 20. . Reference numeral 21 denotes a pair of upper and lower rollers rotatably supported in front of the pair of upper and lower shafts 10 and 11, and the upper roller 2
1 and the front side of the upper roller 18, three endless upper round belts 22 are stretched through the upper roller 19, and the lower roller 21
and the front side of the lower roller 18, four endless round belts 2 are connected via the lower roller 19.
As shown in FIG. 7, the lower running part 22a of the upper round belt 22 is interposed between the upper running part 23a of the lower round belt 23. The books are arranged alternately, forming seven belt rows M. 24 is a pair of upper and lower rollers that are rotatably supported with respect to the fixed frame 2 inside the roller 19, and 25 is a pair of upper and lower rollers that are rotatably supported with respect to the fixed frame 2 inside the roller 21. Both the upper and lower round belts 22 and 23 are tensioned by both rollers 24 and 25.

Reference numeral 26 denotes a front film pressing member supported vertically movably with respect to the front fixed frame 2, and is divided into a central pressing portion 26a and lateral pressing portions 26b on both left and right sides of the central pressing portion 26a. As shown in FIG. It is interposed between the running parts. A pressure receiving plate 27 extends from the fixed frame 2 in correspondence with the front 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 moving frame that is inserted through the rear side of the lower shafts 5, 7, and 11 so as to be movable in the axial direction thereof, and female threaded portions 29 are attached to both left and right sides of the moving frame.
A male threaded rod 29 is screwed into a. This both male threaded rod 29 is supported by the fixed frame 2, and the chain 29b
A handle 29c is attached to one of the female threaded rods 29 on the outside of the fixed frame 2 on the rear side, and the movement of the movable frame 28 can be adjusted by rotating the handle 29c.

Reference numeral 30 denotes a pair of upper and lower rollers that are movably and rotatably supported in the axial direction of the pair of upper and lower shafts 16 and 5 so as to be positioned within the moving frame 28, and 31 denotes the pair of upper and lower shafts 6. , 7, which are a pair of upper and lower rollers similarly supported, and two endless round belts 49 are stretched between the upper rollers 30 and 31 on the front side, and the lower rollers 30 , 31, an endless round belt 49 is stretched between the two round belts 49. 32 is the pair of upper and lower shafts 10 and 11;
These rollers 30, 31, and 32 are a pair of upper and lower rollers that are similarly supported by the moving frame 2.
8 is pushed by the moving frame 28 due to the movement adjustment.
It is adapted to move in the axial direction following the moving frame 28.

Reference numeral 33 indicates four endless round belts stretched between the upper rollers 30 and 32 via the upper roller 31, and 34 indicates the lower rollers 30 and 32.
Six endless round belts are stretched between the lower rollers 31, and as shown in FIG.
The lower running portion 33a of the upper round belt 33 is interposed between the running portions 34a except between the two running portions 34a, and the upper and lower running portions 33
A, 34a are arranged alternately one by one, 10
It is a belt row of books M. 35 is a pair of upper and lower rollers that are rotatably supported within the moving frame 28 inside the roller 31;
The roller 3 moves in accordance with the adjustment of the movement of the roller 3.
Both round belts 33 and 34 are tensioned by a pair of upper and lower rollers 36 which are rotatably supported on the inside of the moving frame 28.

Reference numeral 37 denotes a film pressing member on the rear side that is vertically movably supported with respect to the movable frame 28, and is divided into a central pressing portion 37a and lateral pressing portions 37b on both sides of the central pressing portion 37a. Reference numeral 38 denotes a pressure receiving plate extending from the upper part of the moving frame 28 in correspondence with the rear presser member 37, and the positional relationship between the rear presser member 37 and the pressure receiving plate 38 and the upper and lower round belts 33, 34 is as described above. This is the same as in the case of the front film pressing member 26.

Then, as shown in FIG. 7, the round belt 2
2, 23 and the round belts 33, 34, there is a packaging section S corresponding to both the front and rear film pressing members 26, 37.
is configured.

Reference numeral 39 in FIG. 3 denotes a pair of pulleys supported by the rear ends of the roller shafts 3 and 4, and an endless flat belt 40 is stretched between both pulleys 39. 41 is a gear fixed to both the upper and lower rollers 21; 42 is a gear fixed to both the upper and lower rollers 32 and movable in the axial direction together with the rollers 32; 11
The drive rotation is transmitted.

3 and 4, 140 is a drive motor with a transmission installed below the drive shaft 11, 141 is a first clutch brake (drive disconnection device) attached to this drive motor 140, and 140 is a drive motor with a transmission installed below the drive shaft 11;
flat belts 142, 143 for 0 and drive shaft 11
The drive shaft 11 and the drive motor 14 are interlocked via
It consists of a clutch that interlocks the drive shaft 11 and a brake that stops the rotation of the drive shaft 11. Therefore, the rotation of the drive motor 140 is transmitted to the drive shaft 11 via the clutch of the clutch brake 141, and the rotation of the drive shaft 11 is further transmitted to the gears 41, 4.
2, rollers 21, 32, round belts 22, 23, 3
3, 34, etc., to a pair of upper and lower shafts 16, 5 on the opening/closing frame 12 side. And this round belt 2
The portion where 2, 23, 33, and 34 are spanned together constitutes the main conveyance device 1A.

In FIGS. 3 and 5, 144 is a second clutch brake (drive disconnection device) installed below the front end of the lower driven shaft 5, and a flat belt 145, It consists of a clutch that is interlocked via 146 to interlock the roller shaft 4 and the driven shaft 5, and a brake that stops the rotation of the roller shaft 4. Therefore, the rotation of the driven shaft 5 is transmitted to the roller shaft 4 via the clutch brake 144, and the rotation of the roller shaft 4 is further transmitted to the roller shaft 3 via the flat belt 40, and the rotation of the roller shaft 4 is transmitted to the roller shaft 4 via the flat belt 40. The roller shaft 15 superimposed on
It is also transmitted to And these roller shafts 4,
3 and 15 (brake action section), the second clutch brake 144, etc., constitute a braking device 1B.

In FIGS. 3 and 6, 43 indicates the roller shafts 3 and 4.
A saw blade support rod is rotatably installed between the front and rear fixed frames 2, and a saw blade 43a is attached over almost its entire length. 44a is a photo interrupter (saw blade rotation stop sensor) attached to the fixed frame 2 at the front end side of the support rod 43;
Reference numeral 4b is a rotating claw attached to the front end of the support rod 43, and as it rotates, it passes through the photo interrupter 44a. The photo interrupter 44a and the rotating claw 44b
The saw blade rotation stop means 44 is constituted by this. 1
47 is a third clutch brake (drive disconnection device) installed below the rear end of the driven shaft 5,
The flat belt 1 is connected to the driven shaft 5 and the saw blade support rod 43.
48, 149, and the saw blade support rod 43
It consists of a clutch for interlocking and interlocking the driven shaft 5, and a brake for stopping rotation of the saw blade support rod 43. Therefore, the rotation of the driven shaft 5 is transmitted to the saw blade support rod 43 via this clutch brake 147.

A case will be described in which a packaging film F is set from a take-up roller (not shown) provided on one side of the machine frame in the packaging film conveying device 1 constructed as described above. In this case, the position of the moving frame 28 is adjusted in advance according to the width dimension of the packaging film F by operating the handle 29c. Then, when the handle 14 on one side of the machine frame shown in FIG. 18 and 30 are separated, and the film supply port P is opened. From this state, the starting end of the packaging film F on the take-up roller is guided to the supply port P via both roller shafts 3, 4, and placed on the lower round belts 20, 23, 34, 49 shown in FIG. . next,
Return the opening/closing frame 12 downward and release the upper rollers 18, 3.
0 and the lower rollers 18, 30 are brought close to each other and the film supply port P is closed, both edges of the packaging film F in the width direction run under the upper round belts 22, 33 as shown in FIG. parts 22a, 33a and upper running parts 23a, 34a of lower round belts 23, 34
For the belt row M, the running parts 23a, 34a of the first row from the inside, the running parts 22a, 3 of the second row from the inside.
3a and above the running portions 23a and 34a of the third row, and are alternately inserted into an up-and-down meandering state.

From this set state, the packaging film F is guided to the packaging section S by the drive of the main conveyance device 1A as shown in FIG. 3, and is spread out. As shown in FIG. 2, by the upward movement of both the front and rear film pressing members 26, 37, the belt row M is held between the respective pressing portions 26a, 26b, 37a, 37b and the pressure receiving plates 27, 38.

As shown in FIGS. 1 and 2, a packaging film folding device 76 is installed above the packaging film conveying device 1, and as shown in FIG. A rear folding member 82a is a rear folding member 82a in which both sliders 79, which are supported so as to be movable in the front and rear direction with respect to the rear folding member 78, are connected by a connecting plate 80 and rollers 81 on both front and rear sides thereof. Both left and right support members 82 are supported movably in the left and right directions with respect to a support plate 83 installed between the ends.
It is a left and right folding member mounted on a shaft 84 so as to be rotatable in the left and right direction with respect to a. An auxiliary folding plate 86 is screwed so that its position can be adjusted.

Reference numeral 89 denotes a front folding member installed between the front ends of both the rails 78, which includes both front and rear conveyance rollers 90 and a folding roller 91 provided behind the rear side conveyance roller 90. A plurality of round belts 90a are stretched between 90,
A round belt 90b is stretched between the rear conveyance roller 90 and the folding roller 91 at both ends, so that both round belts 90a, 90b rotate only in the direction of arrow C.

A threaded rod 180 is supported on the support plate 83 so as to extend in the left-right direction, and is formed with a left-hand threaded portion 180a and a right-handed threaded portion 180b.
2a is screwed into the left-hand threaded portion 180a, and the other support member 82a is screwed into the right-hand threaded portion 180b. 181 is an electric motor installed on the machine frame behind the left and right support members 82a, and a pulley 182a of its output shaft 181a is connected to a pulley 182b attached to a threaded rod 180 between the left and right support members 82a. On the other hand, they are interlocked via a flat belt 182. When the threaded rod 180 is rotated by the electric motor 181, the left and right support members 82a move on the left and right threaded portions 180a and 180b, approaching or separating from each other.

In FIGS. 10 and 11, reference numeral 183 denotes an L-shaped guide plate fixed to the front portions of the left and right support members 82a, and a base plate portion 183a extending to both left and right sides.
and an engagement plate portion 183b extending forward along the rail 78 from its tip.
A roller 184 attached to the tip of the roller 83b is supported so as to be movable in the left-right direction with respect to a rail portion 185 on the machine frame. When the left and right support members 82a move in the left and right direction, the left and right guide plates 183 also move in the same direction along with this movement. 186 is the engagement plate portion 1 of the guide plate 183
A guide groove 187 formed in 83b so as to extend in the front-rear direction is a guide pin that is engaged with this guide groove 186, and is provided protruding from the slider 79 of the rear folding member 77 below the engagement plate portion 183b. It is supported movably in the left and right direction with a long hole 188 relative to the projecting plate portion 79a. A link 189 is rotatably supported between the lower end of the guide pin 187 and the front end sides of both the left and right folding members 82. Then, the rear folding member 7
When the slider 79 of No. 7 moves forward and backward along the rail 78, the guide pin 187 moves against the guide plate 18.
3, the left and right folding members 82 rotate about the pivot point 84 by the link 189 to open and close each other. Also, when the left and right support members 82a approach and separate from each other, the guide pin 1
87 moves along the elongated hole 188 of the slider 79, both the left and right folding members 82, the guide plate 183,
The guide pin 187 and the link 189 move in parallel in the left-right direction while maintaining the same positional relationship.

In FIGS. 1 and 2, 93 is a bracket erected on the rear end of the rail 78, and 94 is a support shaft 9 rotatably installed between the upper parts of the bracket 93.
5, and is rotatably attached to a shaft 96a with respect to an interlocking rod 96 that is driven 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 mounted on the shaft.

When the interlocking rod 96 is in the upward movement position, the rear folding member 77 is moved as shown in FIG.
is in the retracted position, and both the left and right folding members 82 are in an open state. When the interlocking rod 96 moves from this state, the rear folding member 77 is pushed forward by the lever 97 and the link 98 as shown in FIG. 186 is regulated in position, and both left and right folding members 82 are linked 189
These folding members 89, 77, and 82 are closed to each other via the front, rear, left, and right folding members 89, 77, and 82, forming a folding portion R. As shown in FIG. 1, this folding section R corresponds to the packaging section S of the packaging film conveying device 1.

1 and 2 show a device 101 for discharging goods W,
102 is a pair of links rotatably supported on both sides of a support shaft 103 installed between the lower portions of both brackets 93; 113 is a support shaft installed below the support shaft 103 between both brackets 93; 1
A pair of links rotatably supported on both sides of 14, each link 102, 113
extend forward from the support shafts 103 and 114. 1
Reference numeral 16 denotes an L-shaped interlocking link which is rotatably connected between the tips of the links 102 and 113 with shafts 116a and 116b. roller 120
is attached. Reference numeral 104 denotes a conveyor on which an endless belt 104a made of sponge is stretched, and is supported by a guide plate 115 extending rearward from both sides of its rear end so as to be rotatable in the vertical direction with respect to the shaft 116b. is placed on the roller 120 of the interlocking link 116, and corresponds to the packaging section S of the packaging film conveying device 1 in a horizontal state. 117 is the above-mentioned interlocking link 1
A connecting rod 118 connected between the two brackets 93 is a handle rotatably supported by a supporting rod 119 installed between the upper parts of both the brackets 93, and the threaded rod 118a thereof is screwed into the connecting rod 117. has been done. In addition, each of the links 102, 113, 116
Thus, a four-bar link mechanism is constructed in which the two support shafts 103 and 114 are fixed joints.

Then, when the handle 118 is rotated, the connecting rod 117 moves along the threaded rod 118a, and both the links 102 move up and down around the support shafts 103 and 114, and the guide plate 11 of the conveyor 104 moves.
While the rollers 120 of the interlocking link 116 slide on the conveyor 104, the conveyor 104 moves in parallel in the vertical direction.

108 is a drive shaft 104b of the conveyor 104
A belt pulley 109 is fixed to the support shaft 114.
A round belt 110 is stretched between both belt pulleys 108 and 109. Reference numeral 121 denotes an idler pulley fixed to the guide plate 115 of the conveyor 104, which tensions the round belt 110. 11
1 is the support shaft 1 so as to be interlocked with the belt pulley 109.
The sprocket is rotatably supported relative to the sprocket 14, and is driven and rotated by the chain 112.

Then, when the chain 112 is rotated in the direction of arrow D, the sprocket 111, the belt pulley 109,
The belt 104a of the conveyor 104 rotates in the sending direction E via the round belt 110 and the belt pulley 108. However, since the sprocket 111 is supported on the spindle 114 by the one-way clutch 111a, the rotation of the chain 112 is not transmitted to the sprocket 111, and the belt 1 of the conveyor 104 is
04a does not rotate in reverse.

In FIGS. 1, 14, and 15, reference numeral 45 denotes a belt-conveying type product supply device installed below the film transport device 1 both inside and outside the machine frame, and 150 extends in the front-rear direction on both left and right sides of the product supply device 45. A link 152 is rotatably supported by a support shaft 151, which is a guide rod placed parallel to the product supply device 45 and is rotatably supported on both the front and rear sides of the left and right sides of the article feeding device 45, and a link 152 that can rotate integrally with the support shaft 151. ing. Reference numeral 153A denotes a potentiometer (item width detection sensor) attached to one side of the article supply device 45, and a rotary operation shaft 154 interlocked with the potentiometer is arranged so as to extend in the left-right direction on the lower surface of the article supply device 45. The rotary operation shaft 154 is supported by a left-hand threaded portion 154a and a right-handed threaded portion 154b. Reference numeral 155 denotes a moving block screwed onto both threaded portions 154a and 154b, and is connected to the support shaft 15.
A link 156 is rotatably supported between the lever 151a and the lever 151a, which can rotate together. When the handle 157 of the rotation operation shaft 154 is turned, the moving block 1 on the same shaft 154 is rotated.
55 move toward and away from each other, and both guide rods 150 on the product supply device 45 also move toward and away from each other via the link 156, the support shaft 151, and the link 152, and the rotational displacement of the rotational operation shaft 154 changes to the position of the potentiometer 153A. transmitted to. Therefore, when both the guide rods 150 are aligned with the left and right edges of the article W placed on the article supply device 45, a detection signal proportional to the distance between the guide rods 150, that is, the width L in the left-right direction of the article W is detected by the potentiometer. 153A is designed to detect it. And both guide rods 15
0, potentiometer 153A, rotation operation shaft 1
54, the moving block 155, etc. constitute an article width detection means 153.

As shown in FIGS. 1, 14, and 15, 46 indicates the inner end of the article feeding device 45, the packaging section S, and the folding section R.
An article receiving device that is moved up and down between
The product W is removed from the product supply device 45 at the lowest moving position.
is transferred and placed, and positioned by a stopper 47.

Reference numeral 158 denotes a comb-shaped stopper member attached to the article supply device 45 in the vicinity of the article pedestal device 46, which protrudes from and retracts from the top of the device 45 and regulates the supply of the article W to the pedestal device 46. It's becoming like that. Reference numeral 159 denotes a main transport device drive sensor mounted near the stopper member 158, which is composed of a light emitting element 159a and a light receiving element 159b, and is adapted to detect the article W to be stopped by the stopper member 158.

130A, 130 in Figures 2, 12 and 13
B indicates first and second limit switches (item height detection sensors) attached to the bracket 93 at one end of the support shaft 103, and 131 and 132 are slightly offset from each other in the circumferential direction with respect to the support shaft 103. When the support shaft 103 rotates together with the link 102, the first tilting plate 131 first pushes the operating rod 130a of the first limit switch 130A. Then, the second tilting plate 132 pushes the operating rod 130b of the second limit switch 130B. The conveyor 104, as shown in FIG.
moves upward to the folding portion R, and below the rear folding member 77 and both left and right folding members 82 perform the folding operation, and then the same article W is carried forward and the front folding member 89 performs the folding operation. However, in order to bring the item W into contact with the conveyor 104 when the pedestal device 46 moves upward, the distance N between the top surface of the pedestal device 46 and the conveyor 104 is set to the height H of the item W. They are almost equal, and the variation in the height H of the item W can be replaced by a variation in the distance N, and further, can be replaced by the rotational displacement of the support shaft 103. Therefore, as described above, the support shaft 103
With the rotation of the first and second tilting plates 131, 132
The first and second limit switches 130A,
130B is equivalent to detecting the height H of the item W in a certain range, and the tilting plates 131, 132 and the limit switch 130
A and 130B constitute the article height detection means 130.

Note that 48 is a heater device on which the packaged goods carried out from the front folding member 89 are placed.

Next, the electrical configuration of the packaging machine configured as described above will be described.

In FIG. 16, the microcomputer 17
0 is the central processing unit (hereinafter referred to as CPU) 171,
It consists of a program memory 172 consisting of a read-only memory (ROM) and a working memory 173 consisting of a readable and rewritable memory (RAM), and is built in a control box (not shown) provided in the packaging machine. There is. And CPU1
71 operates based on a control program stored in program memory 172.

The main transport device drive sensor 159 is the CPU
171 and when the article W is detected, the clutch of the first clutch brake 141 (drive disconnection device for the main conveyance device) is connected and the brake is released, and the rotation of the drive motor 140 is transferred to the main conveyance device 1A. It is beginning to be transmitted.

The potentiometer 153A serves as an article width detection sensor. That is, as described above, when both guide rods 150 are aligned with both the left and right edges of the article W placed on the article supply device 45,
A detection signal from the potentiometer 153A, which is proportional to the width L in the left-right direction of the article W, is input to the CPU 171. Then, the CPU 171 calculates the horizontal width L of the article W based on this input signal. (First indexing means) The result of this calculation is temporarily stored in the working memory 173.

The limit switches 130A and 130B serve as article height detection sensors. That is, as described above, when the conveyor 104 is moved up and down, the detection signals of the limit switches 130A and 130B proportional to the height H of the article W are sent to the CPU 1.
71. and,
The CPU 171 calculates the height H of the item W based on this input signal. (Second indexing means) This calculation result is stored in the working memory 173.
It has come to be temporarily memorized.

The photo interrupter 44a (saw blade rotation stop sensor) is input to the CPU 171, and after the rotating claw 44b rotates once, the photo interrupter 44a (saw blade rotation stop sensor)
a, the third clutch brake 147
When the clutch of the saw blade drive disconnection device is disconnected, the brake is applied and the saw blade support rod 43 comes to a sudden stop.

In addition to the control program, the program memory 172 stores information about the transport direction A of the strip-shaped packaging film F when the unwrapped item W is sent to the packaging section S.
The optimum film length FL corresponding to the width L of the article W in the left-right direction along the width L is stored in advance. (First storage means) That is, when the values obtained by dividing the horizontal width L of the article W into certain ranges are L1, L2... (L1<L2), the film length FL is FL ₁ , FL ₂ ...
(FL ₁ <FL ₂ ) is selected.

Further, a correction value FL' for the film length FL is also stored in advance in the program memory 172 in accordance with the height H of the item W. (Second storage means) That is,
The value of the height H of the item W divided into certain ranges is
When H ₁ , H ₂ ... (H ₁ < H ₂ ), the correction value FL' of the film length FL is FL ₁ ′, FL ₂ ′ ...
(FL ₁ ′<FL ₂ ′) is selected.

The film length FL and its correction value FL' are then calculated. Therefore, when FL'=0, FL _o (n=1, 2...), or each film length
FL ₁ , FL ₂ ...each correction value FL ₁ ′,
FL ₂ ′...The sum of each, that is, FL _o
+FL _o '(n=1, 2...) is the type of film length. However, in reality, FL is divided into 16 stages, and FL' is divided into 3 stages (when neither the first nor second limit switch 130A, 130B operates, FL' = 0, only the first limit switch 130A operates). When both the first and second limit switches _130A and 130B are operated, FL'=FL ₂ ').

Further, the program memory 172 stores the second clutch brake 144 (drive intermittent device for the control device) according to the specified film length FL+FL'.
drive timing TB (the memory transfer device 1A)
TC (the time until the roller shafts 15, 4 stop rotating after the drive of the memory transfer device 1A, and the time until the rotation of the roller shafts 15, 4 stops after the clutch is disconnected and the brake is applied), and time from when the clutch is connected to when the brake is released before stopping the device 1A), and the drive timing TA of the third clutch brake 147 (saw blade drive intermittent device) (after the main conveyance device 1A is driven). The time required for the saw blade 43a to rotate after the clutch is connected and the brake is released is stored in advance. (Third storage means) That is, the film length FL+FL′ is FLn or FLn+
When FLn' (n=1, 2...), the drive timings TB and TC of the second clutch brake 144
As TB1, TB2...(TB1<TB2) and TC1,
TC2...(TC1<TC2) is selected, and also as the drive timing TA of the third clutch brake 147.
TA1, TA2... (TA1<TA2) is selected. Also, the first clutch brake 14
1 (driving intermittent device for the main conveying device) (the time period from when the main conveying device 1A is driven until the clutch is disengaged and the brake is applied until the device 1A stops) is determined based on the film length.
It remains constant regardless of FL+FL'. The second clutch brake 144 is configured such that the clutch is disengaged and the brake is applied in accordance with this driving timing T. This drive timing T is also stored in advance in the program memory 172.

Furthermore, the CPU 171 has the working memory 17
The horizontal width L and height H of the item W stored in 3.
The respective drive timings TA, TB, TC,
reading T from the program memory 172;
Each clutch brake 141, 144, 147 is controlled to be driven at these drive timings TA, TB, TC, and T. (Drive control means) That is, by this drive control, the film length FL +
When FL′ is short, the drive timings TA, TB,
TC is also short, and conversely, when the film length FL+FL' is long, the drive timings TA, TB, and TC also become long.

Note that the article width detection means 153 and the article height detection means 130 are as shown in FIG.
The CPU 171 uses a film length setting dial that allows you to select an arbitrary film length according to the horizontal width L and height H of the item W, and sends a detection signal from the dial according to the film length to the CPU 171. You may also have the user input the information.

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

Before operation, place the item W (a tray containing items) on the item supply device 45, align both guide rods 150 with the left and right edges of the item, and operate the handle 118 to move the conveyor 104 to the optimum position. When adjusted to the height, the film length FL+FL' and the drive timings TA, TB, TC, and T of each clutch brake 141, 144, and 147 are determined automatically. For example, as shown in Figure 17 A, B, C, and D, since the item W is small, the shortest film F is
(Film length FL + FL' = FL1), the head F1 of the film F located at the supply port P as shown in FIG. It always stops between the upper and lower rollers 18 and 30 of the supply port P.

Next, by driving the article supply device 45, the article W
is transferred and placed on the pedestal device 46 that has moved downward. At this time, the rear folding member 77 is attached to the interlocking rod 9.
Move back by upward movement of 6.

During this feeding, when the main conveyance device drive sensor 159 of the article supply device 45 detects the article W, the clutches of the first clutch brake 141 and the second clutch brake 144 are connected and the brakes are released, and the drive motor 140 The rotation is transmitted to both the roller shafts 15, 4 of the main conveying device 1A and the braking device 1B of the film conveying device 1, and the head F1 of the film F is conveyed toward the packaging section S in the center of the main conveying device 1A. go. During this process, as shown in FIG. 17B, when the clutch of the third clutch brake 147 is connected at drive timing TA1 and the brake is released, the saw blade support rod 43 rotates to move the film F to a predetermined length. A perforation B in the width direction is formed in each case. When the rotating pawl 44b cuts the photo interrupter 44a as the saw blade support rod 43 rotates, the clutch of the third clutch brake 147 is disconnected and the brake is engaged, causing the saw blade support rod 43 to stop suddenly.

Furthermore, as shown in FIG. 17C, when this perforation B passes both the upper and lower roller shafts 15, 4 toward the packaging section S by the indexing distance _P1 , that is, at drive timing _TB1 , the second clutch is opened. Brake 1
44 is disengaged and the brake is applied, causing the lower roller shaft 4 to stop suddenly. Therefore, the film F held between the upper and lower roller shafts 15, 4 is pulled in the transport direction A, and this tension causes it to be cut at the perforation B as shown in FIG. be done.

After that, the center of the film F in the length direction is aligned with the packaging part S.
When the main conveying device ₁ reaches the center S1, that is, at the drive timing T1, the clutches of the first clutch brake 141 and the second clutch brake 144 are disconnected, and the brakes are heated.
Both the roller shafts 15 and 4 of the braking device A and the braking device 1B suddenly stop, and the film F is set at the center S1 of the packaging section S. Further, the head _F1 of the film F held between the roller shafts 15 and 4 is stopped at the head position _P1 as shown in FIG. 17A.

The packaging film F on the packaging section S is shown in Fig. 8a and b.
As shown in FIGS. 9a and 9b, each pressing portion 2
6a, 26b, 37a, 37b and pressure receiving plates 27, 3
8, the wrapping film F is clamped together with the strip row M, and the packaging film F is prevented from coming off.

Next, when the pedestal device 46 moves upward and the product W pushes up the packaging film F, the product W is covered with the packaging film F.

Thereafter, as the pedestal device 46 moves upward, the interlocking rod 96
When the rear folding member 77 moves downward, the rear folding member 77, which is in the retracted position, moves forward. Along with this forward movement, both the left and right folding members 82
also approach each other. Next, when the rear folding member 77 and the left and right folding members 82 enter below the article W, and the pedestal device 46 moves downward again, the article W
While the packaging film F is placed on the rear folding member 77, the folding operation of the packaging film F is performed below the article W from both rear and right and left directions. In synchronization with this folding operation, the center pressing part 37a and the lateral pressing part 37b of the rear film pressing member 37 and the front film pressing member 2
The horizontal pressing portions 26b of No. 6 are moved downward, and each pressing portion 37
The clamping by a, 37b, and 26b is released.

Thereafter, the belt 104a is rotated, and the center pressing portion 2 of the front film pressing member 26 is rotated.
When the clamping by 6a is released, the article W is conveyed forward, and is passed from above the rear folding member 77 to the front folding member 89.
transferred above. During the transfer, the packaging film F hits the front folding member 89 on the lower side of the item W and is folded in from the front as well, and the folding from the rear overlaps with the folding from both left and right directions, and the folding from the front overlaps. The lower side of the article W becomes a folding part. Next, the interlocking rod 96 is moved upward again to move the rear folding member 77 backward, and as the rear folding member 77 retreats, both the left and right folding members 82 open from each other.

After packaging, the same item W is carried out to the heater device 48,
There, the folded parts are brought into close contact, one step is completed, and the next step is started.

Also, during this process, the detection signals from the article width detection means 153 and the article height detection means 130 are changed, as shown in FIG.
Longer film F (e.g. film length FL+
When FL′=FL ₂ ) is selected, as in the case described above, after going through each of the actions shown in FIG.
As _shown in FIG.
The clutch of the second clutch brake 144 is disconnected, the brake is engaged, and the lower roller shaft 4 suddenly stops, and the film F held between the upper and lower roller shafts 15, 4 is pulled in the conveying direction A. Although it is cut at perforation B by the tensile force, the subsequent action is different. That is, as shown in FIG. 18D, before the separated film F stops at the packaging section S of the main conveyance device 1A, that is, at drive timing TC1, the clutch of the second clutch brake 144 is connected and the brake is turned off. is released, and the separated film F is transported toward the packaging section S by the transport force of the main transport device 1A, and at the same time, the head of the film F that had stopped at the supply port P is removed.
F ₂ is fed out in the transport direction A. Then the first
As shown in Figure 8 D and E, the separated film F
is transported by P ₂ − P ₁ (P ₂ > P ₁ ) and the same film F
When the longitudinal center of the clutch reaches the center S1 of the packaging section S, that is, at drive timing T1, the first clutch brake 41 and the second clutch brake 1
44 is disconnected and the brake is applied, causing both the roller shafts 15, 4 of the main conveying device 1A and the braking device 1B to stop suddenly, and the separated film F is set at the center S1 of the packaging section S. The head _F2 of the fed film F also stops at the same time. Since this head F ₂ is further fed out by the distance P ₂ −P ₁ (P ₂ >P ₁ ) together with the separated film F, the head extension dimension from the roller shafts 15 and 4 is
Stop at _P2 . This indexing dimension P ₂ is larger than the indexing dimension P ₁ by half the difference in film length (FL ₂ -FL ₁ )/2.

The separated film F is the product W as described above.
packaged in.

After packaging, as shown in FIG. 18, the film F is waiting at the supply port P at a distance _P2 from the roller shafts 15, 4.

Thereafter, when the main conveyor drive sensor 159 of the article supply device 45 detects the article W, the first clutch brake 141 and the second clutch brake 1
44 is connected, the brake is released, and the rotation of the drive motor 140 is controlled by the main conveying device 1A and the braking device 1B of the film conveying device 1.
The head _F2 of the film F is conveyed toward the wrapping section S in the center of the conveying device 1. During this process, as shown in FIG. 18, when the clutch of the third clutch brake 147 is connected at drive timing TA2 and the brake is released, the saw blade support rod 43 rotates to hold the film F for a predetermined length. A perforation B in the width direction is formed every length FL2. The saw blade support rod 43 suddenly stops as described above.

Furthermore _, as _shown in FIG. 14
4 is disengaged and the brake is applied, causing the lower roller shaft 4 to suddenly stop. Therefore, the film F held between the upper and lower roller shafts 15, 4 is pulled in the conveyance direction A, and this tension causes the film to be cut at the perforation B as shown in FIG.

As shown in FIG. 18, before the separated film F stops at the packaging section S of the main conveyance device 1A, that is, at drive timing TC2, the clutch of the second clutch brake 144 is connected and the brake is released, and the separated film F is transported toward the packaging section S by the transport force of the main transport device 1A, and at the same time, the head F2 of the film F, which had been stopped at the supply port P, is fed out in the transport direction A. It will be done. Thereafter _{, as shown} in FIG _.
When the longitudinal center of the film F reaches the center S1 of the packaging section S, that is, at drive timing T2, the first clutch brake 14 is activated.
When the clutches of the first and second clutch brakes 144 are disconnected and the brakes are applied, both the roller shafts 15 of the main conveying device 1A and the braking device 1B are
4 suddenly stops, and the separated film F is transferred to the packaging section S.
At the same time, the head _F2 of the unwound film F also stops at the same time. this head
F ₂ is the separated film F along with the above P ₂ −P ₁
Since it is further fed out by (P ₂ >P ₁ ), it stops at the beginning dimension P ₂ from the roller shafts 15, 4. This start-up dimension P ₂ is half the difference in film length from the above-mentioned start-up dimension P ₁ (FL ₂ - FL ₁ )/2
It's only getting bigger.

The separated film F is the product W as described above.
packaged in.

After packaging, as shown in FIG. 18, the film F waits at the supply port P at a distance _P2 from the roller shafts 15, 4, and then moves on to the next process.

In addition, the longer film F (film length
When FL+FL _' =FL ₃ . _. . is selected, the indexing dimension becomes P ₃ .

Meanwhile, during this process, the detection signals from the article width detection means 153 and the article height detection means 130 are changed again, and the shortest film F (film length FL +
When FL'=FL ₁ ) is selected, the center of the length of the film F is determined as shown in FIG. 19 after going through the actions shown in FIG. When the center S1 of the packaging section S is reached, that is, at drive timing _T2 , the clutches of the first clutch brake 141 and the second clutch brake 144 are disconnected, and the brakes are engaged, causing both the main conveying device 1A and the braking device 1B to be closed. Roller shaft 1
5 and 4 suddenly stop, and the film F is set at the center S1 of the wrapping section S. Further, the head F ₁ of the film F held between the roller shafts 15 and 4 is stopped at the beginning dimension P ₁ as in FIG. 17A, and the process moves to the next step.

In particular, the conveyance distance G1 of the head _F1 of the film F shown in FIG. 17D is the same as the conveyance distance G2 of the head _F2 of the film F shown in FIG. 18N. Therefore, if the conveyance speeds are the same, comparing the stop timings T1 and T2 (driving timing of the first clutch brake 141) of the film F in the packaging section S will naturally result in T1=T2. In other words, when the film F is always set at the center S1 of the packaging section S, the stop timings T1 and T2 and the film transport time can be kept constant regardless of changes in the length of the film F. .

In addition to the above-mentioned method, the following method can also be used to locate the beginning of the film F.
That is, as in the case of Fig. 18F and G, the second
After going through the actions in Figure 0 A and B, as shown in Figure 20 C, when the perforation B has moved both the upper and lower roller shafts 15, 4 toward the packaging section S side by the above-mentioned indexing dimension P ₂ , that is, At drive timing TB2, the clutch of the second clutch brake 144 is disconnected and the brake is engaged, causing the lower roller shaft 4 to suddenly stop. Therefore, both the upper and lower roller shafts 15, 4
The film F, which is being held between the two, is pulled in the transport direction A, and the perforation B is cut by this tension as shown in FIG. 20D, and the film is transported to the packaging section S. When the longitudinal center of the film F reaches the center S1 of the packaging section S, that is, the drive timing
At T2, the clutch of the first clutch brake 141 is disconnected and the brake is engaged, causing the main conveying device 1A to suddenly stop, and the film F is transferred to the packaging section S.
is set at the center S1. Also, both roller shafts 1
The head F ₂ of the film F held between 5 and 4 stops at the beginning dimension P ₁ as in FIG. 20A.

In this method as well, the transport distance _G1 of the head F1 of the film F shown in FIG. 17D is the same as the transport distance G2 of the head _F2 of the film F shown in FIG. 20D.
Therefore, if the conveyance speed is the same,
Stop timing of film F in packaging section S
Comparing T1 and T2 (driving timing of the first clutch brake 141), naturally T1=T2.
In other words, when the film F is always set at the center _S1 of the packaging section S, the stop timings T1 and T2 and the film transport time can be set to one point, regardless of changes in the length of the film F. can.

In this way, considering that the optimal film length FL + FL' depends on the width L and height H of the item W,
By changing the starting dimensions P ₁ , P _{2 .} . . of the film F accordingly, that is, according to the film length FL+FL', it is useful to equalize and shorten the film transport time.

Although it is ideal to change the film start-up dimension for each selected film length as in the above-mentioned embodiment, there is a limit to the maximum start-up dimension, and it is possible to finely process many types of films within that range. Since control may be difficult due to the capacity of the film transport device, in reality, the cue size is set in two to four stages.

For example, if there are two stages of start-up dimensions P ₁ and P ₂ , all types of films F are divided into long and short sections, and the start-up dimension of the short section of film F is P ₁ and the start-up dimension of the long section of film F. is defined as P ₂ . Then, the drive timings TA ₁ , TB ₁ ,
TC ₁ and T ₂ are determined, and the driving timings TA ₂ , TB ₂ , TC ₂ and T ₂ are determined in accordance with the longest film F among the long sections of films F.
Both films F must be placed in the packaging section S as mentioned above.
However, since the other films F are shorter than this film F, the longitudinal centers of the other films F overrun the center S1 of the packaging section S. Therefore, the shorter the film F among the other films F, the slower the transport speed so that all the films F are always set at the center S1 of the packaging section S.

In this case as well, since the head of the long section of film F is fed out, the film transport starts from a position close to the final stop position of the same head, and the transport distance is shorter than when the film F is not fed out. As a result, the film transport time is shortened.

Effects of the Invention In short, according to the first invention, the drive timing TB, which is set according to the width L in the horizontal direction of the article W,
Since the control device 1B operates at the TC, the starting dimensions P ₁ , P ₂ .

Further, according to the second invention, the beginning dimensions P ₁ , P ₂ . can be done.

[Brief explanation of drawings]

FIG. 1 is a schematic sectional view showing the side surface of a fresh food packaging machine using the packaging film conveying device according to the present embodiment, and FIG. 2 is a schematic sectional view taken along line X-X in FIG. 3 is a schematic plan view of the packaging film conveying device, FIGS. 4, 5, and 6 are partial views showing the interlocking mechanism of each clutch brake, respectively.
The figure is a partial sectional view of the packaging film conveying device, No. 8.
Figures a and b and Figures 9a and b are partial sectional views showing the film clamping action by both the front and rear presser members, Figure 10 is a schematic plan view showing the film folding device, and Figure 11 is the interlocking mechanism of the folding device. Partial sectional view shown, 1st
Figure 2 is a partial sectional view showing the item height detection means;
3 is a sectional view showing a part thereof, FIG. 14 is a plan view showing the article feeding device, and FIG. 15 is a side view,
Figure 16 is an electric block circuit diagram, Figure 17 A,
B, H, D and Figure 18 D, H, H, T, CH,
Figures 1 and 19 are explanatory diagrams of film conveyance action;
Figure 20 A, B, C, and D are explanatory diagrams showing different examples of the film conveying action, and Figure 21 is A, B, and D.
C, D and FIGS. 22A, B, C, and D are explanatory diagrams of the film conveying operation of the conventional example. Film transport device...1, Main transport device...
1A, control device...1B, saw blade support rod...43,
Saw blade...43a, Saw blade rotation stopping means...44, Photo interrupter...44a, Rotating claw...4
4b, Goods feeding device...45, Goods receiving device...
46, Film folding device...76, Back folding member...
...77, Left and right folding members...82, Front folding members...
...89, Goods unloading device...101, Conveyor...
104, Item height detection means...130, Limit switch...130A, 130B, Tilting plate...1
31, 132, Drive motor...140, Clutch brake...141 (drive disconnection device for main transport device), Clutch brake...144 (drive disconnection device for braking device), Clutch brake...147
(drive intermittent device for saw blade), guide rod...150, item width detection means...153, potention meter...
...153A, rotation operation axis...154, moving block...155, drive sensor for main transport device...
159, Microcomputer...170,
CPU...171 (indexing means, drive control means),
Program memory...172 (storage means), packaging section...S, folding section...R, packaging film...
F. Goods...W.

Claims (1)

[Scope of Claims] 1. A belt-shaped packaging device that is installed on the film supply side of the main conveyance device 1A that conveys the packaging film F to the packaging section S, and in which perforations B in the width direction are formed at every predetermined length FL. a braking device 1B that applies a brake to the film F; and a braking device 1B that applies a brake to the film F; Storage means 1 for storing in advance drive timings TB and TC for operating the braking device 1B after driving the main conveyance device 1A;
72, an article width detection means 153 for detecting the width L in the left-right direction of the unwrapped article W, and an indexing means for calculating the width L in the left-right direction of the article W based on the detection signal from the article width detection means 153. 171, the drive timings TB and TC of the braking device 1B with respect to the horizontal width L of the article W calculated by the indexing device 171 are read from the storage device 172, and the braking device 1B is operated at these drive timings TB and TC. 1. A packaging film conveying device for a packaging machine, characterized by comprising a drive control means 171. 2. A brake is applied to the band-shaped packaging film F, which is installed on the film supply side of the main transport device 1A that transports the packaging film F to the packaging section S, and has perforations B in the width direction formed at every predetermined length FL. a braking device 1B; a storage means 172 for storing in advance drive timings TB and TC for operating the braking device 1B after driving the main transport device 1A according to the height H of the unpackaged item W; An article height detection means 130 for detecting the height H of the article W; and an indexing means 1 for calculating the height H of the article W based on a detection signal from the article height detection means 130.
71, and drive timing of the braking device 1B with respect to the height H of the article W calculated by the indexing means 171.
Read TB and TC from the storage means 172,
A packaging film conveying device for a packaging machine, comprising a drive control means 171 for operating a braking device 1B at the drive timings TB and TC.