JPH07113540B2 - Film folding amount control device in packaging machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is, for example, in a packaging machine for fresh food, in which an unwrapped product (a product containing a storage in a tray) is spread in a packaging section. The present invention relates to a film folding amount control device for packaging with a film.

(Prior Art and Problems to be Solved by the Invention) Conventionally, as a packaging machine of this type, for example, JP-A-61-1421
As shown in Japanese Patent Publication No. 09, a film transport device that cuts a strip-shaped packaging film at predetermined lengths and stretches the cut film on the packaging unit, and a film that holds the end of the film stretched on the packaging unit. A holding device, an article receiving device that carries unwrapped items to the packaging unit, an item supply device that transfers unpackaged items to the item receiving unit, and a film stretched in the packaging unit for the items. Some include a film folding device that folds and wraps an item, and an item unloading device that conveys the wrapped item.

Among them, with respect to the film folding device, when the size of the item changes, the biting dimension of the folding member with respect to the lower surface of the item changes, so the folding amount of the packaging film also changes, and the packaging state becomes unstable. There was a problem.

The present invention is intended to solve such a problem, and an object thereof is to be able to appropriately control the film folding amount for an article depending on the size of the article to be packaged.

Configuration of the Invention (Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention is an article cradle device 46 that carries an unwrapped article W and raises the article W to the packaging section S. And the unwrapped product W to the product receiving device 46.
In the packaging machine provided with an article supply device 45 for transporting the product and a film folding device 76 for folding and packaging the film F spread on the packaging section S on the lower surface of the product W, the film folding device 76 includes a product The folding member 77 which moves back and forth in the discharging direction, and the folding members 77 which are always located on both left and right sides of the folding member 77 and which are movable in the left and right directions with respect to the discharging direction of the goods, are mutually driven by the driving force of the driving means 181. A pair of pivoting fulcrums 84 approaching and moving away from each other, and the pivoting fulcrum 84 is set to be pivotable in the left-right direction, and when the folding member 77 moves, the left and right sides approaching and moving away from each other in conjunction with the forward and backward movement of the folding member 77. While the folding member 82 is provided, an article width detecting means 152 for detecting a width L in the left-right direction intersecting the conveyance direction V of the article W transferred by the article supply device 46 at a right angle is provided.
Further, the gist is that the folding amount control means 171 for controlling the drive means 181 on the basis of the detection result of the article width detection means 152 to adjust the distance between the two pivots 84 in the left-right direction is provided.

(Operation) Therefore, the product W from the product supply device 46 to the product cradle device 46
When the product W is transferred, the width L of the product W in the left-right direction in the direction orthogonal to the transport direction V is detected by the product width detecting means 152. Then, the folding amount control means 171 controls the drive of the driving means 181 based on this detection result, and the left-right folding member 82 has a left-right width Q of both pivots 84 and a width L of the article W in the left-right direction.
The interval is adjusted according to.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

Reference numeral 1 in FIG. 1 denotes a packaging film transporting device installed on the upper part of the machine frame. As shown in FIGS. 2 and 3, two roller shafts 3 from the outside are provided on one side between the front and rear fixed frames 2. , 4 and the driven shaft 5 are rotatably installed, and a pair of upper and lower shafts 6, 7 are fixed, while a pair of upper and lower shafts 10, 11 are fixed on the other side. Reference numeral 12 denotes a pair of open / close frames that are rotatably supported in the vertical direction with respect to both front and rear ends of the shaft 6.
From above to above the roller shaft 3, and a support frame 13 having a handle 14 is fixed between the tip ends of both opening / closing shafts 12.
A roller shaft 15 is rotatably installed on the base end side of the shaft 13 and a shaft 16 is fixed.

In FIG. 3, 18 is a pair of upper and lower rollers rotatably supported on the front side of the pair of upper and lower shafts 16 and 5, and 19 is rotatably supported on the front side of the pair of upper and lower shafts 6 and 7. A pair of upper and lower rollers, two endless round belts 20 are laid on the rear side between the upper rollers 18 and 19 and the lower rollers 18 and 19 are connected to each other. One endless round belt 20 is laid so as to be interposed between the round belts 20. Reference numeral 21 denotes a pair of upper and lower rollers rotatably supported with respect to the front side of the pair of upper and lower shafts 10 and 11, and the upper side roller 21 and the front side of the upper side roller 18. The three endless round belts 22 are wound around the rollers 19 and also the lower roller 21 and the lower roller.
Four endless round belts 23 are laid between the front side of 18 and the lower roller 19 via the lower roller 19, and as shown in FIG. 7, between the upper running portions 23a of the lower round belt 23. The lower running part 22a of the upper round belt 23 is interposed in the above, and both running parts 22a, 23a are
Seven belt rows M are arranged alternately one by one. Reference numeral 24 is a pair of upper and lower rollers rotatably supported on the fixed frame 2 inside the roller 19, and 25 is a pair of upper and lower rollers rotatably supported on the fixed frame 2 inside the roller 21. Therefore, the upper and lower round belts 22 and 23 are tensioned by the rollers 24 and 25.

Reference numeral 26A denotes a front side film pressing member supported so as to be vertically movable with respect to the front side fixed frame 2, and is divided into a central pressing portion 26a and a left and right pressing portion 26b.
As shown in FIG. 7, the lower running portions of the inner two round belts 23 of the lower round belt 23 are inserted into 6A, and the pressing portions 26a and 26b are arranged above and below the round belt 23. It is interposed between both running parts. Reference numeral 27 is a pressure receiving plate extending from the fixed frame 2 corresponding to the pressing member 26A, and is interposed between the upper and lower running portions of the upper round bell 22 as shown in FIG.

28 is a moving frame that is inserted through the rear side of the lower shafts 5, 7, 11 so as to be movable in the axial direction thereof, and male screw rods 29 are attached to female screw portions 29a attached to the left and right sides thereof. It is screwed. Both male screw rods 29 are supported by the fixed frame 2 and
29b are interlocked with each other, and one of the male screw rods 29 has a handle 29c on the outside of the fixed frame 2 on the rear side.
Is attached, and the moving frame 28 can be moved and adjusted by rotating the handle 29c.

30 is a pair of upper and lower shafts 1 so that they can be positioned in the moving frame 28
A pair of upper and lower rollers rotatably and rotatably supported with respect to the shafts 6 and 5;
A pair of upper and lower rollers that are similarly supported with respect to each other, and two endless round belts 4 are provided on the front side between the upper rollers 30 and 31.
9 is stretched around, and one endless round belt 49 is stretched between the lower rollers 30 and 31 so as to be interposed between the round bells 49. 32 is the pair of upper and lower shafts
It is a pair of upper and lower rollers that are similarly supported with respect to 10, 11, and these rollers 30, 31, 32 are pushed by the moving frame 28 as the moving frame 28 is adjusted to move, so that they follow the moving frame 28. It is designed to move in the axial direction.

Reference numeral 33 denotes four endless round belts stretched between the upper rollers 30 and 32 via the upper roller 31, and 34 denotes the lower roller 31 between the lower rollers 30 and 32. As shown in FIG. 7, there are six endless round belts that are hung over the upper and lower round belts 34, and the upper round portion between the upper and lower running portions 34a except the central upper running portion 34a. Lower running part 3 of the belt 33
3a is interposed, and the upper and lower traveling portions 33a, 34a are alternately arranged one by one except the central upper traveling portion 34a.
There are 0 belt rows M. Reference numeral 35 denotes a pair of upper and lower rollers rotatably supported in the moving frame 28 inside the roller 31, which follow and move in accordance with the movement adjustment of the moving frame 28, and move inside the roller 32. The two round belts 33, 34 are tensioned by a pair of upper and lower rollers 36 rotatably supported with respect to 28.

Reference numeral 37A denotes a rear side film pressing member supported so as to be movable up and down with respect to the moving frame 28, and is divided into a central pressing portion 37a and a left and right pressing portion 37b. Reference numeral 38 denotes a pressure receiving plate extending above the moving frame 28 corresponding to the rear pressing member 37A. The rear pressing member 37A and the pressure receiving plate 38 and the upper and lower round belts 3
The positional relationship with 3, 34 is the same as that of the front film pressing member 26A.

As shown in FIG. 7, a wrapping section S is formed between the round belts 22 and 23 and the round belts 33 and 34 so as to correspond to the front and rear film pressing members 26A and 37A.

In FIG. 3, 39 is 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 the pulleys 39. 41 is the upper and lower rollers 21
The gear 42 fixed to the upper and lower rollers 32 is a gear that is movable in the axial direction together with the upper and lower rollers 32, and the drive rotation of the lower shaft 11 is transmitted to both gears 41 and 42. It is like this.

In FIGS. 3 and 4, 140 is a main drive motor with a transmission installed below the drive shaft 11, 141 is the main drive motor 1
A first electromagnetic clutch brake (drive disconnecting device) installed adjacent to 40, which is interlocked with the motor 140 and drive shaft 11 via flat belts 142 and 143, and the drive shaft 11 and main drive motor 140 are interlocked. And a brake that stops the rotation of the drive shaft 11. Therefore, the rotation of the main 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 rotated by the gears 41, 42, rollers 21, 32, round belts 22, 23, 33, It is transmitted to the pair of upper and lower shafts 16 and 5 on the opening / closing frame 12 side via 34 and the like.
The portion around which the round belts 22, 23, 33, 34 are stretched serves as the main transport device 1A.

In FIGS. 3 and 5, reference numeral 144 denotes a second electromagnetic clutch brake (driving / interrupting device) installed below the front end of the lower driven shaft 5, which is a flat belt 145,146 with respect to the driven shaft 5 and the roller shaft 4. And a brake for stopping the rotation of the roller shaft 4 and a clutch for interlocking the roller shaft 4 and the driven shaft 5 with each other. 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 transmitted to the roller shaft 3 via the flat belt 40 and on the roller shaft 4. It is also transmitted to the roller shaft 15 which is superposed on. The roller shafts 4, 3, 15 (brake acting portion), the second clutch brake 144, and the like constitute a braking device 1B.

In FIGS. 3 and 6, reference numeral 43 denotes a saw blade supporting rod rotatably installed between the front and rear fixed frames 2 between the roller shafts 3 and 4, and the saw blade 43a is attached to substantially the entire length thereof. There is. Four
Reference numeral 4a denotes a photo interrupter (saw blade rotation stop sensor) attached to the fixed frame 2 at the front end portion of the support rod 43, and 44b.
Is a rotating claw attached to the front end portion of the support rod 43, and is adapted to pass through the photo interrupter 44a as it rotates. And this photo interrupter 44
The saw blade rotation stopping means 44 is composed of a and the rotation claw 44b. Reference numeral 147 denotes a third electromagnetic clutch brake (drive disconnecting device) installed below the rear end of the driven shaft 5, which is interlocked with the driven shaft 5 and the saw blade support rod 43 via flat belts 148 and 149. The saw blade support rod 43 and the driven shaft 5 are connected and disconnected by a clutch and a brake that stops the 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 the clutch brake 147.

In FIG. 4, reference numeral 160 denotes a one-step detection rotary encoder, which is the first output shaft 140 of the main drive motor 140.
It is composed of a disc 160b connected to a (a notch is formed in a part of its outer periphery), and a photo interrupter 160a through which the notch passes as the disc 160b rotates. Reference numeral 161 is a pulse signal detection rotary encoder including a first encoder 162 and a second encoder 163, and the first encoder 162 is a rotary tooth plate 162b connected to the second output shaft 140b of the main drive motor 140 A plurality of uneven portions are formed on the outer circumference.) And a photo interrupter through which the uneven portions pass by the rotation of the rotating tooth plate 162b.
162a, and the second encoder 163 is a rotating tooth plate 163b (a plurality of concave and convex portions are formed on the outer periphery thereof) connected to the output shaft 141a of the first electromagnetic clutch brake 141.
And a photointerrupter 163a through which the concave and convex portions pass as the rotating tooth plate 163b rotates.

A case of setting the packaging film F from the winding roll (not shown) provided on one side of the machine frame in the packaging film transporting device 1 configured as described above will be described. In this case, the handle 29c is operated in advance to move and adjust the position of the moving frame 28 according to the width dimension of the packaging film F. Then, the handle 14 on one side of the machine frame shown in FIG.
When the user grips and lifts, the opening / closing frame 12 rotates upward around the support shaft 6, and the upper rollers 18 and 30 and the lower rollers 18 and 30 are separated from each other to open the film supply port P. . From this state, the starting end of the winding film F of the winding roll is fixed to both roller shafts 3,4.
The lower round belt shown in FIG.
20,23,34,49 Place on top. Next, the open / close frame 12 is returned downward to bring the upper rollers 18 and 30 and the lower rollers 18 and 30 close to each other, and the film supply port P is closed. As shown in the figure, the upper round belt 22,3
3 of the lower running portions 22a, 33a and the upper running portions 23a, 34a of the lower round belts 23, 34 to the belt row M, the upper and second rows of the running portions 23a, 34a in the first row from the inside. Under the traveling portions 22a, 33a of the above, the sheets are alternately inserted into the traveling portions 23a, 34a of the third row, and the upper and lower meandering states are achieved.

From this set state, the packaging film F is guided to the packaging section S by the drive of the main transport device 1A and expanded as shown in FIG. 3, and the film F is shown in FIGS. 8 (a), (b) and 9 As shown in FIGS. (A) and (b), the respective pressing portions 26a, 26b, 37a and 37b are moved by the upward movement of the front and rear film pressing members 26A and 37A.
And the pressure receiving plates 27, 38 are held together with the belt train M.

Next, regarding the film pressing device for packaging 26, 37,
3, 7-9, 10-16 will be described in detail. The left and right pressing portions 26b of the front pressing member 26A described above are connected to the connecting portion 26b as shown in FIG.
The central pressing portion 26a is placed in a recess 26b formed in the upper surface of the connecting portion 26c, which is integrally connected at c.

10 and 11 show a vertical movement mechanism of the left and right pressing portions 26b, and 127 is a fixed shaft 12 supported at both front and rear positions of the front fixed frame 2.
A pair of support rods that extend horizontally in the same direction from 8 and are rotatably supported with respect to the coaxial 128, and a left and right pressing portion 26b is rotatably supported by a shaft 129 between the tip ends thereof,
The centers of the two shafts 128 and 129 are the same. 130 is a pair of interlocking rods that extend upward from the fixed shaft 128 and are integrated with the support rod 127, and a connecting rod 131 is rotatably supported by a shaft 132 between the ends thereof. Axis 128,13
The two center lines have the same distance, and the support rod 127 and the interlocking rod 130 have the same angular difference with respect to the center line of the fixed shaft 128. Reference numeral 133 denotes an operating rod that extends horizontally from one of the two support rods 127 in the opposite direction about the fixed shaft 128 and is integrated with the support rod 127.

50b is a wire hooked on a shaft 135b at the tip of the operating rod 133 of the vertical movement mechanism, 51b is a wire hose through which the wire 50b is inserted, and one end thereof is the operating rod 13
It is fixed to a fixing plate 52b provided below 3. 53b
Is a spring wound around the wire 50b exposed from the wire hose 51b between the operating rod 133 and the fixed plate 52b, and always biases the operating rod 133 in the direction of G arrow rotation.

7 and 11 show a vertical movement mechanism of the central pressing portion 26a, 54 is a rotation shaft rotatably supported by a pair of brackets 55 fixed to the lower surface of the pressure receiving plate 27, and 56 is this rotation. A mounting member fixed to one end of the moving shaft 54, the central pressing portion 26
a is fixed. Reference numeral 57 is an operating rod fixed to the other end of the rotating shaft 54, and extends downward.

50a is a wire hooked on a shaft 135a at the tip of the operating rod 57 of the vertical movement mechanism, 51a is a wire hose through which the wire 50a is inserted, one end of which is the operating rod 57.
It is fixed to a fixed plate 52a provided at the rear of the. 53a is a spring wound around the wire 50a exposed from the wire hose 51a between the operating rod 57 and the fixed plate 52a, and always biases the operating rod 57 in the direction of arrow I rotation. .

Further, as shown in FIGS. 3, 12, and 13, in the rear pressing member 37A as well as in the front pressing member 26A, the left and right pressing portions 37b are integrally connected by the connecting portion 37c and are formed on the upper surface of the connecting portion 37c. The central pressing portion 37a is placed on the recessed portion 37b.

7 and 13 show a vertical movement mechanism of the central pressing portion 37a of the rear pressing member 37A, and 58 is a rotating shaft rotatably supported by a pair of brackets 59 fixed to the lower surface of the pressure receiving plate 38. , 60 are attachment members fixed to one end of the rotary shaft 58, and the central pressing portion 37a is fixed. 61 is the rotating shaft 58
The operating rod is fixed to the other end of the operating rod and extends rearward.

50c is a wire hooked on a shaft 135c at the tip of the operating rod 61 of the vertical movement mechanism, 51c is a wire hose inserted through the wire 50c, and one end of which is the operating rod 61.
It is fixed to a fixing plate 52c provided below. 53c is a spring wound around the operating rod 61 and the wire 50c exposed from the fixed plate 52c.
It is biased in the direction of arrow rotation.

The left and right pressing portions 37b of the rear pressing member 37A are the front pressing members.
The operation is controlled by a vertical movement mechanism similar to that of the horizontal pressing portion 26b of 26A.
A wire 50d inserted through a wire hose 51d is hooked on a shaft 135d of 134.

14 to 16 show the operation control mechanism of the both pressing members 26A, 37A, and the pressing portions 26a, 26b, 37 of the both pressing members 26A, 37A.
Electromagnetic clutch brakes 62a, 62b, 62 that control the operation of a, 37b
c, 62d are fixed on the machine base, and each clutch brake 62a, 62d
Drive side rotary shafts 63a, 63b, 6 horizontally from both sides of b, 62c, 62d
3c, 63d and output side rotary shafts 64a, 64b, 64c, 64d are projected. Then, the clutches in the clutch clutches 62a, 62b, 62c, 62d are connected and disconnected between the drive side rotary shafts 63a, 63b, 63c, 63d and the output side rotary shafts 64a, 64b, 64c, 64d, and the clutch brake 62a. The rotation of the output side rotating shafts 64a, 64b, 64c, 64d is stopped by the brakes in 62b, 62c, 62d so that the stopped state can be maintained. A driven gear 65 is attached to each of the drive side rotary shafts 63a, 63b, 63c, 63d, and meshes with one drive gear 67 attached to a drive shaft 66. Further, output levers 68a, 68b, 68c, 68d are fitted on the respective output side rotary shafts 64a, 64b, 64c, 64d.

The fixed plates 52a, 52b, 5 are attached to the mounting plates 69a, 69b, 69c, 69d which are erected corresponding to the output side rotary shafts 64a, 64b, 64c, 64d.
The other ends of the wire hoses 51a, 51b, 51c, 51d fixed to 2c, 52d are fixed, and the other ends of the wires 50a, 50b, 50c, 50d that penetrate the same hoses 51a, 51b, 51c, 51d are Output lever 68
It is hooked on a shaft 70 at one end of a, 68b, 68c, 68d. A stopper rod 71 is rotatably connected to the other end of each output lever 68a, 68b, 68c, 68d, and its tip is inserted into each of the mounting plates 69a, 69b, 69c, 69d. A male screw 72 is formed on these stopper rods 71, and the male screw 72 is
The adjusting double nut 73 screwed onto the mounting plate 69a, 69b, 69
The output levers 68a, 68b, 68c, 68d are locked by the c, 69d to restrict the tilting of the output levers 68a, 68b, 68c, 68d.

Packaging film holding device 26, 37 configured as described above
First, the operation control of the left and right pressing portions 26b of the front pressing member 26A will be described.

When the clutch and the brake in the clutch brake 62b shown in FIGS. 14 and 15 are released, the rotation of the drive shaft 66 is always rotated by the drive gear 67 and the driven gear 65 during the operation of the packaging machine. Even if the rotation is transmitted to the shaft 63b, the rotation is not transmitted to the output side rotation shaft 64b via the clutch. In this state, as shown in FIG. 10, the operating rod 133 is urged by the spring 53b in the direction of the arrow G to pull the wire 50b upward, and as shown by the solid line in FIG.
The output lever 68b is rotated in the direction opposite to the arrow K by b, and is stopped when the stopper rod 71 is locked to the mounting plate 69b.

Next, when the clutch in the clutch brake 62b is connected, the rotation of the drive-side rotary shaft 63b is transmitted to the output-side rotary shaft 64b and the output lever 68b is rotated in the direction of the arrow K. 50b is pulled and the operating rod 133 is rotated in the direction opposite to the arrow G against the bias of the spring 53b. One of the support rods 127 interlocking with the operating rod 133 is rotated about the fixed shaft 128 in the direction of the anti-G arrow, and is rotated about the coaxial shaft 128 with the rotation of the support rod 127. Rod
The connecting rod 131 is pulled obliquely downward by the 130, and the connecting rod 131 is pulled.
The other interlocking rod 130 is rotated by the 131 in the direction opposite to the arrow G direction around the fixed shaft 128, and the other supporting rod 127 is also coaxial 128.
Is rotated in the direction opposite to the arrow G. Both these support rods 12
When 7 is rotated in the direction opposite to the arrow G at the same time, the left and right pressing portions 26b
The whole is moved up on average, and as shown in FIG. 8 (a), it is securely held between the inner left and right pressing portions 26b of the belt row M and the pressure receiving plate 27. In addition, this left and right pressing part
The upward movement of 26b is performed simultaneously with the upward movement of the central pressing portion 26a described later. After that, when the clutch in the clutch brake 62b is released and the output side rotation shaft 64b is braked, the output lever 68b is held at the tilted position as shown by the imaginary line in FIG. 15, and then the left and right pressing portions 26b. Keeps holding.

When the brake in the clutch brake 62b is also released from this state, the operating rod 133 is forced to G by the urging force of the spring 53b.
It is rotated in the direction of the arrow and the left and right pressing portions 26b move downward. When the wire 50b is pulled upward with this downward movement, the output lever 68b shown by the imaginary line in FIG. 15 is rotated in the direction opposite to the arrow K direction and returns to the position shown by the solid line in FIG.

On the other hand, the central pressing portion 26a of the front pressing member 26A, the central pressing portion 37a of the rear pressing member 37A and the left and right pressing portions 3 shown in FIGS.
Also in 7b, by the control of each clutch brake 62a, 62c, 62d in the same manner as the left and right pressing portions 26b of the front pressing member 26A,
These operating rods 57, 61, 134 are operated via output levers 68a, 68c, 68d and wires 50a, 50c, 50d. That is,
With respect to the central pressing portion 26a of the front pressing member 26A, the clutch is connected from the state where the clutch in the clutch brake 62a and the brake are released, and the operating rod 57 rotates in the direction opposite to the arrow I as shown in FIG. When it is moved, this rotation causes the central pressing portion 26a to rotate around the rotation shaft 58 in the direction of the arrow I and move upward, and as shown in FIG. The inner five are securely held between the central pressing portion 26a and the pedestal plate 27. After that, when the clutch is released and the brake is applied, the central pressing portion 26a maintains the held state. Then the brake is released and the pivot
When 58 is rotated in the direction of the arrow I by the bias of the spring 53a, the central pressing portion 26a is rotated around the rotation shaft 58 in the direction of the arrow I and moves downward, so that the recess between the left and right pressing portions 26b is depressed. It will be put back on 26d.

Regarding the central pressing portion 37a of the rear pressing member 37A, the operating rod 61 is rotated in the opposite J arrow direction or the J arrow direction shown in FIG. 7 in the same manner as the central pressing portion 26a of the front pressing member 26A. The central pressing portion 37a is moved up and down in correspondence with the five inner belts of the belt train M as shown in FIG. 9 (b).

Regarding the left / right pressing portion 37b of the rear pressing member 37A, as in the case of the left / right pressing portion 26b of the front pressing member 26A, the left / right pressing portion 37b is rotated by rotating the operating rod 134, as shown in FIG. 9 (a).
As shown in FIG. 5, the belt is moved up and down corresponding to the inner five of the belt row M.

As shown in FIGS. 1 and 2, the packaging film folding device 76 is installed above the packaging film transport device 1, and 77 is the first
As shown in Figs. 7 and 19, both sliders 79 supported so as to be movable in the front-rear direction are connected to rails 78 arranged on the left and right sides of the upper part of the machine frame by a connecting plate 80 and rollers 81 on the front and rear sides thereof. The rear folding member, 82a is a left and right support member supported movably in the left and right directions with respect to a support plate 83 installed between the rear end portions of the rails 78 behind the rear folding member 77, and 82 is these both. A left and right folding member supported by a shaft 84 so as to be rotatable in the left-right direction with respect to the support member 82a, and extends from the coaxial 84 (rotation fulcrum) below the rear folding member 77 to the front side. The auxiliary folding plate 86 is screwed to the position adjustable member. The left and right folding members 82 are formed by the support plate 83, the left and right supporting members 82a, and the pivots 84 of the left and right folding members 82.
The support mechanism is configured.

Reference numeral 89 denotes a front folding member that is provided between the front ends of the rails 78, and has front and rear conveying rollers 90 and a folding roller 91 that is provided behind the rear conveying rollers 90. A plurality of round belts 90a are stretched between 90, and round belts 90b are stretched between the rear-side transport roller 90 and the folding roller 91 at both ends thereof, and both round belts 90a, 90b are It is designed to rotate only in the direction of the arrow C.

180 is a threaded rod supported on the support plate 83 so as to extend in the left-right direction, and includes a left-hand threaded portion 180a and a right-handed threaded portion 18a.
0b is formed, and one support member 82a of the left and right support members 82a is screwed to the left-hand threaded portion 180a, and the other support member 82a is screwed to the right-handed threaded portion 180b. 1
81A is an electric motor installed on the machine frame behind the left and right support members 82a, and has a pulley of its output shaft 181a.
182a is interlocked via a flat belt 182 with a pulley 182b attached to a screw rod 180 between the left and right support members 82a. When the screw rod 180 is rotated by the electric motor 181A, the left and right support members 82a move on the left and right screw portions 180a and 180b to approach or separate from each other. And the screw rod
The drive mechanism 181 for the left and right support members 82a is constituted by 180, the electric motor 181A, the flat belt 182, and the like.

In FIGS. 17, 18, and 19, reference numeral 183 denotes an L-shaped guide plate fixed to the front portions of the left and right support members 82a, and extends along the rail 78 from the base plate portion 183a extending to the left and right sides and the tip thereof. The engaging plate portion 183b extends forward, and the engaging plate portion 18b
The roller 184 attached to the tip of 3b is the rail part 185 on the machine frame.
In contrast, it is supported so as to be movable in the left-right direction. And
When both the left and right support members 82a move in the left and right directions, the left and right guide plates 183 also move in the same direction with this movement. 186 is a guide groove formed in the engaging plate portion 183b of the guide plate 183 so as to extend in the front-rear direction, and 187 is a guide pin engaged with the guide groove 186, which is located below the engaging plate portion 183b. A slider 79 of the folding member 77 is supported by a projecting plate portion 79a projecting from the slider 79 through a long hole 188 so as to be movable in the left-right direction. 189 is the guide pin 187
Is a link rotatably supported by the lower end portion and the front end sides of the left and right folding members 82. Then, when the slider 79 of the rear folding member 77 moves in the front-rear direction along the rail 78, the guide pin 187 causes the guide groove 18 of the guide plate 183 to move.
After moving along 6, the left and right folding members 82 are pivoted about the pivotal fulcrum 84 by the link 189 to open and close each other. When the left and right support members 82a approach and separate from each other, the guide pin 187
While moving along the elongated hole 188 of the slider 79, the left and right folding members 82, the guide plate 183, the guide pin 187 and the link 18 are moved.
9 move in parallel to the left and right while maintaining the same positional relationship. The guide plate 183, the guide groove 186,
The guide pin 187, the link 189, the elongated hole 188 of the slider 79, and the like constitute an interlocking mechanism between the rear folding member 77 and the left and right folding members 82.

In FIGS. 1 and 2, 93 is a bracket which is erected on the rear end of the rail 78, and 94 is a lever which is fixed to a spindle 95 rotatably installed between the upper parts of the bracket 93. And is pivotally supported by a shaft 96a with respect to an interlocking rod 96 that is vertically driven. 97 is a pair of levers fixed to both ends of the spindle 95 on the outside of the bracket 93,
Is a link rotatably supported on the tip of the lever 97 by a shaft 99, and is rotatably supported by the slider 79 on the shaft 100.
It is supported by.

When the interlocking rod 96 is in the upward movement position, the first
As shown in FIGS. 7 and 19, the rear folding member 77 is in the retracted position, and the left and right folding members 82 are open to each other. When the interlocking rod 96 moves downward from this state, the rear folding member 77 is pushed by the lever 97 and the link 98 to move forward as shown in FIG. 1, and the guide pin 187 of the rear folding member 77 guides the guide plate 183. The groove 186 is positionally regulated so that the left and right folding members 82 are closed to each other via a link 189, and the front and rear left and right folding members 89, 77, 82 are defined as a folding portion R. The folding section R corresponds to the packaging section S of the packaging film transport device 1 as shown in FIG.

1 and 2 show a device W for carrying out an article W. Reference numeral 102 denotes a pair of links rotatably supported on both sides of a support shaft 103 provided between the lower portions of the brackets 93, and 113 denotes the support. Axis 103
Support shaft 114 installed between both brackets 93 below
A pair of links rotatably supported on both sides of each of the links 102 and 113. The links 102 and 113 extend forward from the support shafts 103 and 114. 116 is a shaft between the tips of the links 102 and 113.
An L-shaped interlocking link rotatably connected with 116a and 116b, and a roller 120 is attached to a portion extending forward from both lower left and right shafts 116b. Reference numeral 104 denotes a conveyor around which an endless belt made of sponge 104a is hung, and the shaft 116 is provided on a guide plate 115 extending rearward from both sides of its rear end.
The guide plate 115 is supported rotatably in the vertical direction with respect to b, and is mounted on the roller 120 of the interlocking link 116 so as to be horizontally supported on the packaging unit S of the packaging film transport device 1. ing. 117 is the link link 116
A connecting rod 118 connected in between is a handle rotatably supported by a supporting rod 119 installed between the upper portions of both brackets 93, and its screw rod 118a is screwed to the connecting rod 117. ing. The links 102, 113, and 116 form a four-bar linkage mechanism in which a fixed joint is provided between the support shafts 103 and 114.

Then, when the handle 118 is rotated, the connecting rod 117 moves along the threaded rod 118a, so that both links 102 support the shafts 103, 114.
The vertical movement of the guide plate 115 of the conveyor 104
While the roller 120 of the interlocking link 116 slides, the conveyor 10
4 moves up and down in parallel.

Reference numeral 108 denotes a belt wheel fixed to the drive shaft 104b of the conveyor 104, 109 denotes a belt wheel rotatably supported by the support shaft 114, and a round belt 110 is stretched between the belt wheels 108 and 109. There is. Reference numeral 121 is an idler pulley fixed to the guide plate 115 of the conveyor 104, and tensions the round belt 110. Reference numeral 111 is a sprocket rotatably supported on the support shaft 114 so as to interlock with the belt wheel 109, and is driven and rotated by a chain 112.

When the chain 112 is rotated in the direction of the arrow D, the sprocket 111, the belt wheel 109, the round belt 110, the belt wheel 1
The belt 104a of the conveyor 104 is sent out via 08
Turn to. However, since the sprocket 111 is supported by the support shaft 114 by the one-way clutch 111a, the rotation of the chain 112 is not transmitted to the sprocket 111 and the conveyor is
Belt 104a of 104 does not rotate in the reverse direction.

In FIGS. 1, 20, and 21, reference numeral 45 denotes a belt-conveying type article conveyor which is installed below the film conveying apparatus 1 inside and outside the machine frame, and is composed of an outer conveyor 190A and an intermediate conveyor 190B. One conveyor 19
0 and an inner second transfer conveyor 191. Only the second transfer conveyor 191 is introduced into the machine frame.

Regarding the outer transfer conveyor 190A of the first transfer conveyor 190, an endless flat belt 192 is stretched between both pulleys 192a and 192b, and a drive motor 193 is applied to one pulley 192a.
Is transmitted through the transmission gears 194, 195, 196, 197.

Regarding the intermediate transfer conveyor 190B of the first transfer conveyors 190, a plurality of endless round belts 198 are stretched in parallel between both pulleys 198a and 198b, and the drive motor 193 rotates with respect to one pulley 198b. Is transmitted from the transmission gears 194, 195 and 196 via the transmission gear 199, the sprocket 200a, the chain 200 and the sprocket 200b. An electromagnetic brake 201 is attached to the rotation center shaft 196a of the transmission gear 196.

Regarding the second transport conveyor 191, a plurality of endless round belts 202 are hung in parallel between both pulleys 203, 204, and a plurality of brackets are provided on a support plate 205 installed inside one pulley 203. 206 is fixed so as to project inward, and an endless round belt 207 is stretched between a pulley 207a supported at the tip of the bracket 206 and the pulley 203.

Reference numeral 150 denotes an item size detection device installed on the intermediate transfer conveyor 190B of the first transfer conveyor 190,
As shown in FIG. 22, a plurality (16 in the present embodiment) of article width detection sensors 152 (photoelectric switches) are provided on the horizontal portion 151a of the gate-shaped mounting member 151 at substantially right angles to the conveying direction V of the article W. It is installed side by side in the crossing direction and its vertical part
151b includes a plurality of (four in the present embodiment) article height detection sensors 153 (photoelectric switches) each of which includes a light emitting element 153a and a light receiving element 153b, and a vertical direction in which a plurality of article height detecting sensors 153 (photoelectric switches) intersect at a substantially right angle to a conveyance direction V of the article W. Is attached to. In particular, each article width detection sensor 152 is located on both sides of the transport center V1 of the transport conveyor 190B in a line symmetrical position with respect to the transport center V1, and in this embodiment, when the distance between the innermost sensors 152 is a. The sensors 152 on the outer side are arranged at equal intervals a / 3. In addition,
The interval between each article width detection sensor 152 and each article height detection sensor 153 can be adjusted.

Of the two pulleys 203,204 on which the round belt 202 is hung, a lever 208 is supported on a support shaft 208 that is installed adjacent to one pulley 204 so as to project toward the other pulley 203, The lever 209 is urged downward by a spring 209a, and a comb-shaped stopper member 210 is attached to the tip of the lever 209.
Has been attached. Spindle 2 installed below lever 209
A cam plate 212 is supported by 11 so that it can abut against a roller 213 supported by the intermediate portion of the lever 209.
The rotation center shaft 203a of the one pulley 203 and the support shaft 211 of the cam plate 212 are interlocked via a sprocket 214, a chain 215 and a sprocket 216. Then, as the cam plate 212 rotates, the lever 209 tilts upward against the bias of the spring 209a, the stopper member 210 projects above the article transfer surface 202a on the round belt 202, and then the stopper member 21.
The operation of 0 is repeated by the urging force of the spring 209a so as to be depressed below the article transfer surface 202a.

An intermediate transfer conveyor 190 of the first transfer conveyors 190
The above-mentioned article size detection device 150 on B and the second conveyor 19
A first sensor 165 and a second sensor 166 (photoelectric switch) are provided above the transport conveyor 190B in the vicinity of the adjacent portion between the first and second sensors. Then, the first sensor 165 first detects the article W transferred on the transport conveyor 190B, and then the second sensor 166 detects the article W when the article W further moves due to inertial rotation of the transport conveyor 190B. It is supposed to do.

The second transfer conveyor 191 near the stopper member 210
A third sensor 167 (photoelectric switch) including a light emitting element 167a and a reflector 167b is arranged on both sides of the stopper member 2
The article W stopped by 10 is detected.

As shown in FIGS. 20 and 21, 154A is a potentiometer (position detection sensor) installed on the support plate 83 so as to correspond to one end of the screw rod 180. Are linked together. When the screw rod 180 is rotated by the electric motor 181A, the rotational displacement of the screw rod 180 is transmitted to the potentiometer 154A. Therefore,
The potentiometer 154A detects a detection signal proportional to the distance Q between the pivots 84 of the left and right folding members 82. Then, the position detecting means 15 for the left and right folding members 82 is formed by the screw rod 180 and the potentiometer 154A.
4 are configured.

As shown in FIGS. 1, 20 and 21, reference numeral 46 denotes an article cradle device which is vertically moved between the inner end of the article conveyor 45 and the wrapping section S and the folding section R. Equipped with a plurality of loading tables 46a, the goods conveyor 4 at the lowest position
Item W is transferred from 5 and placed, and item positioning device 4
Positioning is carried out by 7 stoppers 47a.

Reference numeral 48 denotes a heater device which is interlocked with the front folding member 89 of the film folding device 76, and the package is placed on the flat belt 48a.

Although not shown, a cam device is attached to the third output shaft of the main drive motor 140, and the interlocking rod 96 of the article receiving device 46 and the film folding device 76 is interlocked with this cam device. The third output shaft is the both film pressing device.
The drive shaft 66 for 26 and 37 and the chain 215 of the second transfer conveyor 191 are also interlocked. The rotation lever fixed to the drive shaft 66 is connected to the chain 112 of the article unloading device 101, and is reciprocally rotated by the rotation of the lever. On the other hand, the front folding member 89 of the film folding device 76
The flat belt 48a of the heater device 48 is interlocked with an electric motor.

That is, the film transport device 1 and the film pressing device
26, 37, the article receiving device 46, the second conveyor 191 of the article conveyor 45, the film folding device 76 (excluding the front folding member 89), and the product unloading device 101 all use the main drive motor 140 as a drive source. Among them, especially the film conveying device 1 and the film pressing devices 26, 37 are driven by opening / closing of the clutch brakes 141, 144, 147, 62a, 62b, 62c, 62d, and the first conveying conveyor 190 of the article conveying conveyor 45.
Is driven by a conveyor drive motor 193.

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

In FIG. 23, a microcomputer 170 is a central processing unit (hereinafter referred to as CPU) 171, a read-only memory (RO
M) consisting of a program memory 172 and a readable / rewritable memory (RAM) for working memory 173, and a control box (not shown) provided in the packaging machine.
Is built into. And CPU171 is a program memory
It operates based on the control program stored in 172.

The main switch MS is input to the CPU 171, and the CPU 171 operates the main drive motor 140 and the conveyor drive motor 193 by this input signal.

The first encoder 162 for pulse signal detection and the second encoder 163 are input to the CPU 171, and the CPU receives the input signal.
The counter in 171 counts the number of pulse signals from these encoders 162 and 163, and the CPU 171 calculates the pulse signal numerical data TM and CT based on the detection signal from this counter.

The one-step detection encoder 160 is input to the CPU 171,
With this input signal, the CPU 171 is configured to return the number of pulse signals of the first encoder 162 to zero every predetermined number TM as shown in FIGS. Each of these sections (initial process I, initial process II, continuous process I ...) Becomes one process of packaging.

The first sensor 165 and the second sensor 166 are input to the CPU 171. When the first sensor 165 detects the article W, based on the detection signal, the conveyor 193 is stopped, both conveyors 190A and 190B of the first conveyor 190 are also stopped, and then the same article W is conveyed by this conveyor. If the second sensor 166 moves further due to the inertial rotation of 190B,
When the detection signal is detected, the conveyor electromagnetic brake 201 is actuated to completely stop the first transfer conveyor 190, and after a predetermined time (the stopper member 210 in the second transfer conveyor 191 moves above the round belt 202). The operation of the conveyor electromagnetic brake 201 is released and the conveyor drive motor 193 is rotated at substantially the same timing as the protrusion.

The third sensor 167 is input to the CPU 171. The first clutch brake 141 is provided on condition that the sensor 167 and the second sensor 166 detect the article W.
The main drive motor 14 is connected with the clutch of the main drive device drive connection / disconnection device and the brake is released.
The rotation of 0 is transmitted to the main conveyance device 1A, the clutch of the second clutch brake 144 (braking device drive connection / disconnection device) is connected and the brake is released, and the rotation of the main conveyance device 1A is reduced to the braking device. It is transmitted to 1B.

Each item width detection sensor 152 and each item height detection sensor 1
53 is input to the CPU 171, and the CPU 171 detects the horizontal width L of the article W as the article detection number N of each article width detection sensor 152 based on the input signal, and the height H of the article W.
Is calculated as the number U of detected articles of each article height detection sensor 153. The result of this calculation is temporarily stored in the working memory 173.

The photo interrupter 44a (saw blade rotation stop sensor) is input to the CPU 171, and when the rotation pawl 44b reaches the photo interrupter 44a after one rotation, the third clutch brake 147 (saw blade drive interrupting device). The clutch is disengaged, the brake is applied, and the saw blade support rod 43 suddenly stops.

In addition to the control program in the program memory 172,
An optimum film length FL is stored in advance in accordance with the lateral width L of the article W along the transport direction A of the strip-shaped packaging film F when the unwrapped article W is sent to the packaging section S. . That is, the number N of articles detected by the article width detection sensor 152.
When the value obtained by dividing the width L of the article W in the left-right direction into certain ranges is L1, L2 ... (L1 <L2), the film length FL is FL1, FL2 ... (FL1 <FL2 ) Is to be selected. In this embodiment, in principle, a signal of N = ± 2 is required when changing the FL. For example, when N = 4, N / 2 = 2 and FL2, and after the change, N = 4 + 2 is FL3 and N = 4-2 is FL1,
When N = 5, N / 2 = 2.5 <3 and FL2. After change, FL = 3 when N = 5 + 2, FL1 when N = 5-2, and N / 2 = 8 when N = 16. It is FL8, and after change N = 16-2 FL7
When N = 3, N / 2 = 1.5 <2 and FL1 is obtained. After the change, N = 3 + 2 is FL2. When N = 2, N / 2 = 1 is FL1 and the changed is N. It becomes FL2 at = 2 + 2. As an exception, FL1 when N = 1, and after change N = 1 + 2
However, FL1 is FL1 when N = 0, and FL1 becomes FL1 even after N = 0 + 2.

Further, in the program memory 172, a correction value FL 'of the film length FL is also stored in advance according to the height H of the article W. That is, when the values obtained by dividing the height H of the product W into a certain range corresponding to the number U of detected products of the product height detection sensor 153 are H1, H2 ... (H1 <H2), the film length is FL correction values FL 'are FL1', FL2 '... (FL1'<FL
2 ') is selected. In this embodiment, U1,
When U2, U3, U4, they become FL1 ', FL2', FL3 ', FL4', respectively.

Then, the film length FL and its correction value FL 'are calculated. Therefore, each film length FL1, FL2
..Addition of the respective correction values FL1 ', FL2' ... respectively, that is, FLn + FLn '(n = 1,2 ...
・) Is the type of film length.

In this embodiment, all types of films F are divided into two, long and short, and for each short film F, the program memory 172 stores the initial process II and the continuous process I for each film length as shown in FIG. After that, the drive timings TA1 and TE1 of the first clutch brake 141 (drive / interruption device for main transport device) and the drive timing TA of the second clutch brake 144 (drive / interruption device for control device) similarly.
1, TC1 and TD1 as well as the drive timing TB1 of the third clutch brake 147 (saw blade drive connecting / disconnecting device) are stored in advance. As for the film F of the long section, the drive timing TA2, TB2, TC2, TD2, TE2 is stored in the program memory 172 for each film length as shown in FIG.
Is stored in advance. The TA (TA1, TA2) is equal to the pulse signal numerical data TM1 from the first encoder 162, the clutches of the first and second clutch brakes 141 and 144 are connected and the brakes are released, and the main carrier device 1A and the braking device are released. 1B shows the timing of rotation. The TB (TB1, TB2) indicates the timing at which the saw blade 43a rotates when the clutch of the third clutch brake 147 is connected and the brake is released after the rotation of the main transport device 1A and the braking device 1B, and the TA (TA1 , TA2) and the pulse signal numerical data CT2 from the second encoder 163
Equal to (TM1 + CT2) added to. The time zone during which the saw blade rotation stop sensor 44a operates to suddenly stop the saw blade 43 is equal to the data CT3. The TC (TC1, TC2) indicates the timing at which the rotation of the saw blade 43a disengages the clutch of the second clutch brake 144 and the brake is applied to stop the rotation of the roller shafts 15 and 4 of the braking device 1B. Encoder 163
The pulse signal numerical data CT4 from is added to the above TM1 (TM
It is equal to 1 + CM4). The TD (TD1, TD2) is connected to the clutch of the second clutch brake 144 after the roller shafts 15 and 4 of the braking device 1B are stopped and before the main transport device 1A is stopped. It indicates the timing of rotation and is equal to (TM1 + CT5) obtained by adding the pulse signal numerical data CT5 from the second encoder 163 to the TM1. The time period during which the braking device 1B rotates is equal to the data CT6. The TE (TE1, TE2) is the main carrier device in which the clutches of the first and second clutch brakes 141 and 144 are disengaged and the brakes are applied after the main carrier device 1A is rotated.
1A and the braking device 1B indicate the timing to stop, the pulse signal numerical data CT1 from the second encoder 163 to the TM1
Equal to (TM1 + CT1) added to. Note that (TM1 + CT1) is equal to (TM1 + CT5 + CT6).

Further, in the long section film F, the drive timing TD (TD0) is stored in the program memory 172 in advance in the initial step I shown in FIG. This TD0 is the second sensor
On condition that 166 detects the article W, the clutches of the first and second clutch brakes 141 and 144 are connected and the brakes are released, so that the main carrier device 1A and the braking device.
1B indicates the timing of rotation, and is equal to the pulse signal numerical data TM0 from the first encoder 162. The time period in which these rotate is equal to the pulse signal numerical data CT0 from the second encoder 163.

Further, the CPU 171 reads the drive timings TA, TB, TC, TD, TE stored in the working memory 173 from the program memory 172, and the drive timings TA, TB, TC, T
The clutch brakes 141, 144, 147 are driven and controlled by D and TE. That is, by this drive control, the drive timing TA1, TB1,
TC1, TD1, TE1 are also short, and conversely, in the case of the long film F, the drive timings TA2, TB2, TC2, TD2, TE2 are also long.

As shown in FIG. 23, a film length setting manual dial 158 capable of selecting an arbitrary film length according to the horizontal width L and height H of the item W is used. Signal from the same dial 158 according to the CPU
May be input.

On the other hand, in the program memory 172, the electromagnetic clutch brakes 62a, 62b, 62c, 62d (front center, front left and right, respectively) of the film pressing devices 26, 37 after the continuous process I shown in FIGS.
Drive timing TF of the rear center and rear left and right film pressing drive connecting / disconnecting device (the clutch is connected and the brake is released so that the central pressing portion 26a and the left and right pressing portions 26b of the front film pressing member 26A and the rear film pressing member 37A are The timing at which the central pressing portion 37a and the left and right pressing portions 37b press the film F) and TG (timing at which the pressing portions 26a, 26b, 37a, 37b are separated from the film F due to clutch disengagement and braking) are stored in advance. ing. That is,
The clutch brakes 62a, 62b, 62c for each film length,
As the drive timing TF and TG of 62d (TD1a, TD1b, TD1c,
TD1d) (TD2a, TD2b, TD2c, TD2d) ... and (TE1a, TE1
b, TE1c, TE1d) (TE2a, TE2b, TE2c, TE2d) ... Are selected. The TF is the first encoder 16
2 is equal to the pulse signal numerical data TM2 from TG, and TG is the pulse signal numerical data TM3, TM from this first encoder 162.
4, TM5 and TM6 were added to TM2 (TM2 + TM3) (TM2 + TM4)
Equal to (TM2 + TM5) (TM2 + TM6).

As shown in FIG. 23, the drive timings TF, TG
Manual adjustment for film presser setting 74
The signals from the dials 74a, 74b, 74c and 74d corresponding to the film length may be input to the CPU 171 by using a, 74b, 74c and 74d.

Further, the CPU 171 reads out the drive timings TF and TG stored in the work memory 173 from the program memory 172, and drives and controls the clutch brakes 62a, 62b, 62c and 62d at the drive timings TF and TG. Has become.

The above-mentioned drive timings TA, TB, TC, TD, TE, TF, TG
Is determined according to the production capacity (the number of packages per minute).

On the other hand, in the program memory 172, when the unwrapped article W is sent to the folding section R, the optimum left and right folding members corresponding to the width L of the article W corresponding to the space between the left and right folding members 82.
82 position data are stored in advance. That is, as described above, the rotation fulcrum of the left and right folding members 82 is determined in accordance with the film length determined in accordance with the number N of articles detected by the article width detection sensor 152 and the number U of articles detected by the article height detection sensor 153. Q1, Q2 ... (Q1 as the interval Q (position data) between 84
<Q2) is selected.

The potentiometer 154A also functions as a left and right folding member position detection sensor. That is, as described above, the detection signal of the potentiometer 154A, which is proportional to the interval Q between the pivots 84 of the left and right folding members 82, is input to the CPU 171. Then, the CPU 171 is adapted to calculate the interval Q based on this input signal. The result of this calculation is temporarily stored in the working memory 173.

Further, the CPU 171 reads from the program memory 172 the interval Q between the rotation fulcrums 84 of the left and right folding members 82 with respect to the width L of the article W stored in the work memory 173 from the program memory 172. The position data Q from the memory 173 is compared, and the electric motor 181A is drive-controlled so as to match them. That is, by this drive control, as shown in FIG.
When the width L in the left-right direction is large, the interval Q is large, and conversely, when the width L is small, the interval Q is small as shown in FIG.

Next, the outline of the actual packaging action will be described.

First, when the main switch MS is pressed, the main drive motor 14
0 and the conveyor drive motor 193 rotate. When the main drive motor 140 rotates, the first output shaft 140a and the second output shaft 140
b and the third output shaft (not shown) rotate. Secondary output shaft 1
The rotation of 40b is transmitted to the first clutch brake 141, and the main transport device 1A and the braking device 1B are stopped. The one-step detection encoder 160 works by the rotation of the first output shaft 140a, and the first pulse signal detection encoder 162 works by the rotation of the second output shaft 140b. The rotation of the third output shaft is transmitted to the clutch brakes 62a, 62b, 62c, 62d of the film pressing devices 26, 37, and the holding by the pressing portions 26a, 26b, 37a, 37b is released. Further, the rotation of the third output shaft causes the second transfer conveyor 191 and the stopper member 21 of the product transfer conveyor 45.
0, the product receiving device 46, the film folding device 76, the product conveying device 101, etc. are operated. Meanwhile, conveyor drive motor 1
The rotation of 93 also operates the first conveyor 190 of the goods conveyor 45.

Next, when the articles W are sequentially placed on the flat belt 192 of the first transfer conveyor 190, the articles W are transferred onto the round belt 198 of the first transfer conveyor 190 at regular intervals.

When the article W enters the article size detection device 150 shown in FIG. 22,
The article width detection sensor 152 and the article height detection sensor 153 automatically detect the article W according to its size. in this case,
Even if the product W is deviated in the left-right direction with respect to the conveyance center V1 on the product conveyance conveyor 45, the deviation is allowed up to about a / 2, and within that range, the number N of articles detected by the article width detection sensor 152 changes. There is no risk of error in the selection of film length based on it. Then, corresponding to the number N, U of the detected items, the film length and each clutch brake 141,
144,147,62a, 62b, 62c, 62d drive timing TA, TB, TC, T
D, TE, TF, TG are determined by themselves, and the left and right folding members 82
The distance Q between the rotation fulcrums 84 is adjusted. For example, when the longest film F (film length FL1) is selected from the films F in the short section as shown in FIGS. 26 (a) (b) (c) (d) (e) (f), As shown in FIG. 26 (a), the head F1 of the film F located at the supply port P has a heading dimension P0 from the roller shafts 15 and 4 (between the upper and lower rollers 18 and 30 of the film supply port P). By the way, it is always stopped.

After that, when the first sensor 165 detects the article W, the conveyor drive motor 193 stops and the first transport conveyor 190 also stops. At this time, when the second sensor 166 detects the product W when the product W on the first transfer conveyor 190 is further moved by the inertial rotation of the first transfer conveyor 190, the electromagnetic brake 201 operates and the first transfer conveyor 190 operates. 190 completely stops, and the article W also completely stops at a predetermined position and stands by. Further, the article W following this article W is also stopped at regular intervals.

The second transfer conveyor 191 is constantly driven during the operation of the packaging machine, and the stopper member 210 in the second transfer conveyor 191 is electromagnetically synchronized with the timing of the stopper member 210 protruding above the article transfer surface 202a on the round belt 202. When the brake motor 201 is released and the drive motor 193 is rotated, the first transfer conveyor 190 is driven again, and the article W waiting on the first transfer conveyor 190 has the round belt of the second transfer conveyor 191. 202
Transferred to the top. The article W that is moving on the round belt 202 contacts the stopper member 210, and the movement of the article W is restricted by this contact. The third sensor 167 detects this article W.

After that, the stopper member 210 is placed on the article transfer surface on the round belt 202.
When the product W on the round belt 202 is moved below the 202a, the product W on the round belt 202 is transferred onto the round belt 207, positioned by the stopper 47a, and stands by above the pedestal 46a of the article cradle device 46 already in the lowered position. At this time, the rear folding member 77 is retracted by the upward movement of the interlocking rod 96. After that, the next item W is transferred and its movement is regulated under the same operation as that described above. The article receiving device 46 moves up and down once while the stopper member 210 appears and disappears, and the article W waiting on the round belt 207 is carried to the packaging section S by this up and down movement.

During the feeding, on condition that the second sensor 166 and the third sensor 167 detect the article W, the initial step II shown in FIG.
At the driving timing TA1, the clutches of the first clutch brake 141 and the second clutch brake 144 are connected and the brakes are released, and the rotation of the main drive motor 140 causes the main transport device 1A and the braking device of the film transport device 1 to rotate.
After being transmitted to both roller shafts 15 and 4 of 1B, the head F1 of the film F is conveyed toward the packaging section S at the center of the main conveying apparatus 1A. During that time, as shown in FIG. 26 (b), the clutch of the third clutch brake 147 is driven at the drive timing TB1.
When the connection is made and the brake is released, the saw blade support rod 43 rotates to form perforations B in the width direction for each predetermined length FL1 of the film F. When the rotating claw 44b disengages the photo interrupter 44a with the rotation of the saw blade support rod 43, the clutch of the third clutch brake 147 is disengaged and the brake is applied so that the saw blade support rod 43 suddenly stops.

Further, as shown in FIG. 26 (c), when the perforation B exceeds the upper and lower roller shafts 15 and 4 toward the packaging section S by the indexing dimension P0, that is, at the drive timing TC1, the second clutch The clutch of the brake 144 is disengaged, the brake is applied, and the lower roller shaft 4 suddenly stops.
Therefore, the film F held between the upper and lower roller shafts 15 and 4 is pulled in the transport direction A, and is cut at the perforation B by the pulling force.

As shown in FIG. 26 (d), before the separated film F is stopped in the packaging section S of the main transport device 1A, that is, at the drive timing TD1, the clutch of the second clutch brake 144 is connected and the brake is applied. 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 F1 of the film F stopped at the supply port P is unrolled in the transport direction A. Be done. Thereafter, as shown in FIGS. 26 (d) and (e), the separated film F is conveyed by P1-P0 (P1> P0), and the center of the length direction of the film F becomes the center S1 of the packaging section S. When it reaches, that is, at the drive timing TE1, the clutches of the first clutch brake 141 and the second clutch brake 144 are disengaged and the brakes are applied, and both roller shafts 15 and 4 of the main transport device 1A and the braking device 1B suddenly stop. Then, the separated film F is set at the center S1 of the packaging unit S, and the head F1 of the unwound film F also stops at the same time.
This head F1 together with the separated film F is P1-P0.
(P1> P0) is further extended, so roller shafts 15,4
Stop at the cueing dimension P1 from.

Next, the drive timing TF1a of the continuous process I shown in FIG.
TF1b, TF1c, TF1d, the wrapping film F on the wrapping part S has the front and rear film holding members 26, 37 as shown in FIGS. 8 (a), (b) and 9 (a), (b). By the upward movement, the belt rows M are clamped between the pressing portions 26a, 26b, 37a, 37b and the pressure receiving plates 27, 38, and the packaging film F is prevented from slipping out.

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

Thereafter, when the interlocking rod 96 moves downward with the upward movement of the cradle device 46, the rear folding member 77 in the retracted position advances. With this forward movement, 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 cradle device 46 moves downward again, the article W is placed on the rear folding member 77 and rearward below the article W. Also, the folding operation of the packaging film F is performed from both left and right directions.

In synchronism with this folding operation, the left and right pressing portions 26b of the film holding member 26 on the front side and the central pressing portion 37a and the left and right pressing portions 37b of the film holding member 37 on the rear side are connected to the continuous process I shown in FIG.
Driven by TG1b, TG1c, TG1d driving timing,
The holding by 26b, 37a, 37b is released.

Thereafter, when the belt 104a is rotated and the central pressing portion 26a of the film pressing member 26 on the front side is moved downward by the driving timing TG1a of the continuous process I shown in FIG. Is transported to the front and the rear folding member
Transferred from above 77 onto the front folding member 89. In the middle of the transfer, the packaging film F hits the front folding member 89 under the article W and is also folded from the front, and the folding from the rear is overlapped with the folding from the left and the folding from the front is further overlapped. It will be the folding part on the lower side. Next, the interlocking rod 96 is again moved upward, the rear folding member 77 retracts, and the left and right folding members 82 open together as the rear folding member 77 retracts.

After packaging, the same article W is carried out to the heater device 48, where the folded portions are brought into close contact with each other and the packaging is completed.

Upon completion of this packaging, the head F1 of the packaging film F stands by at the feed-out port P at the head-out dimension P1 from the roller shafts 15 and 4, as shown in FIG. 26 (f). Then, as in the case described above, FIG. 26 (b) (c) (d) (e)
The following packaging is performed through each action shown in (f).

Even when the next item W is not transferred to the second conveyor 191 the item receiving device 46 moves up and down, but since the second sensor 166 and the third sensor 167 do not detect the item W, the film F is not conveyed. It is not done and will not be packed empty.

On the other hand, FIG. 27 (a) (b) (c) (d) (e) (f)
When the longest film F (film length FL2) is selected from the long section films F as shown in (g), the initial process shown in FIG. 25 is changed from the state shown in FIG. 27 (a). At the drive timing TD0 of I, the first clutch brake 141
And the clutch of the second clutch brake 144 is connected and the brake is released, and the rotation of the main drive motor 140 is transmitted to both the roller shafts 15 and 4 of the main transport device 1A and the braking device 1B of the film transport device 1 and the film. Head of F2
Is fed toward the packaging section S at the center of the main transport device 1A. Then, as shown in FIG. 27 (b), the head F2 is stopped at the preliminary indexing dimension P1 from the roller shafts 15 and 4.

After the preliminary indexing, the packaging is performed under the same operation as that described above. In this case, Figures 24 and 26 (a)
(B) (c) (d) (e) (f) correspond to FIGS. 25 and 27 (b) (c) (d) (e) (f) (g), respectively, and P0 and P1 Correspond to P1 and P2 respectively, and TA1, TB1, TC1, TD1, TE1, TF1a, TF1b, TF1c, TF1
d, TG1a, TG1b, TG1c, and TG1d are TA2, TB2, and T, respectively.
C2, TD2, TE2, TF2a, TF2b, TF2c, TF2d, TG2a, TG2b,
Corresponds to TG2c and TG2d. The second sensor 166 is the next item W
If no is detected, only the preliminary cueing in the initial step I is performed.

Incidentally, as in the above-mentioned embodiment, it is ideal to change the cueing dimension of the film for each selected film length, but there is a limit to the maximum cueing dimension, and various types of films can be finely divided within that range. In some cases, it may be difficult to control due to the capability of the film transport device, so the cue size is actually set to 2 to 4 levels.

For example, when two-step cue sizes P1 and P2 are set, all types of films F are divided into two, long and short, as described above, and the cue size of the short film F is P1 and the long film F.
The cue size of P2 is P2. Then, the drive timings TA1, TB1, TC1, TD1, TE1, TF1a, TF1b, TF1c, TF1d, TG are adjusted in accordance with the longest film F among the short-division films F.
1a, TG1b, TG1c, TG1d are determined, and the drive timings TA2, TB2, TC2, TD2, TE2, TF2a, TF2b, TF2c, TF2d, TG are set according to the longest film F among the long-division films F.
Determine 2a, TG2b, TG2c, TG2d. The two films F are always set at the center S1 of the packaging portion S as described above, but since the other film F is shorter than the film F, the center in the longitudinal direction of the other film F is the center S1 of the packaging portion S. Overrun. Therefore, the shorter the film F among the other films F, the slower the conveying speed, and all the films F are always set at the center S1 of the packaging unit S.

In the second embodiment shown in FIG. 28, a third encoder 164 is mounted on the braking device 1B of the film transporting device 1 in the first embodiment, and the encoder 164 is the roller shaft 4
The rotating toothed plate 164b is connected to the rear end of the rotating toothed plate 164b (the uneven portion is formed on the outer periphery of the rotating toothed plate 164b), and the photo interrupter 164a passes through the uneven portion as the rotating tooth plate 164b rotates. . The first and second encoders 162 and 163 and the third encoder 164 in the first embodiment constitute a pulse signal detection encoder 161. The second clutch brake 144 is interlocked with the driven shaft 6 and the roller shaft 4 through flat belts 145 and 146 on the rear end side thereof, and the third clutch brake 147 is connected to the driven shaft 5 and the front end side of the saw blade support rod 43. Therefore, they are interlocked with each other via flat belts 148 and 149.

This third encoder 164 is input to the CPU 171 as shown in FIG. 23, the counter in the CPU 171 counts the number of pulse signals from this encoder 164 by this input signal, and the CPU 171 outputs the pulse based on the detection signal from this counter. It is designed to calculate the signal numerical data CT.

In the first embodiment, the film transport device 1 shown in FIGS.
First, second and third clutch brakes 141,144,147 for
The pulse signal number from the first encoder 162 is used as the control pulse signal numerical data TM1 of
Although the number of pulse signals from the second encoder 163 is used as T1, CT2, CT3, CT4, CT5 and CT6, in this second embodiment, the control pulse of the second clutch brake 144 in FIGS. 24 and 25 is used. Only the signal numerical data CT4, CT5 and CT6 use the number of pulse signals from the third encoder 164. It should be noted that each clutch brake 62a, 62b, 6 for the film pressing device 26, 37
2c, 62d control pulse signal numerical data TM2, TM3, TM4, TM5,
The TM6 uses the number of pulse signals from the first encoder 162 in both the first and second embodiments.

The application example of the article size detection device 150 according to the present embodiment has been described above, but the following control can also be performed.

That is, when the article W is displaced in the left-right direction with respect to the conveyance center V1 of the article conveyor 45, the article width detection sensor 152 on the left side
Although there is a difference in the number N of detected articles between the article width detection sensor 152 on the right side and the article width detection sensor 152 on the right side, it is possible to perform control so as to warn the deviation when the difference becomes 2 or more, for example.

As a place to install the article size detection device 150, in addition to the article transport conveyor 45 of the packaging machine of the present embodiment,
It may be anywhere as long as it needs to detect the size of the item.

As described in detail above, according to the present invention, the article supply device 45
Since the interval Q of the rotation fulcrums 84 of the left and right folding members 82 for folding the film F is adjusted in accordance with the horizontal width L of the product W detected by the product width detecting means 152 during the transfer by the product W. It is possible to make the folding amount of the film F with respect to the film folding amount suitable for the size of the article W to be packaged.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing a side surface of a packaging machine for fresh food according to this embodiment, FIG. 2 is a schematic cross-sectional view as seen from line XX of FIG. 1, and FIG. A schematic plan view of
4, 5 and 6 are partial views showing the interlocking mechanism of each clutch and brake, respectively, and FIG. 7 is a partial cross-sectional view of the packaging film transporting device, FIGS. 8 (a) (b) and 9 Figures (a) and (b) are partial cross-sectional views showing the film holding action by the front and rear pressing members, and Fig. 10 is a front view showing the front pressing member,
FIG. 11 is a plan view of the same, FIG. 12 is a front view showing a rear pressing member, FIG. 13 is a plan view of the same, FIG. 14 is a plan view showing an operation control mechanism of front and rear pressing members, and FIG. 15 is the same. Left side view,
FIG. 16 is a right side view of the same, FIGS. 17 and 19 are schematic plan views showing a film folding device, FIG. 18 is a partial cross-sectional view showing an interlocking mechanism of the folding device, and FIG. 20 is an article supply device. FIG. 21 is a side view showing the same, FIG. 21 is a plan view of the same, FIG. 22 is a partial sectional view showing an article size detecting device according to this embodiment, FIG. 23 is an electric block circuit diagram, and FIGS. 24 and 25 are clutches. Brake time chart, Fig. 26 (a) (b) (c) (d)
(E) (f) and FIG. 27 (a) (b) (c) (d)
(E), (f) and (g) are explanatory views of the film transport operation, and FIG. 28 is a plan view showing another embodiment of the packaging film transport device. Film transport device 1, main transport device 1A, control device 1B,
Film pressing device 26, 37, front film pressing member 26A, central pressing portion 26a, left and right pressing portion 26b, rear film pressing member 37A,
Central pressing part 37a, left and right pressing parts 37b, saw blade support rod 43, saw blade 43
a, saw blade rotation stopping means 44, photo interrupter 44a,
Rotating claw 44b, article transfer conveyor 45, article receiving device 46, clutch brakes 62a, 62b, 62c, 62d (film pressing drive interrupting device), film folding device 76, rear folding member 77, left and right folding members 82, Left and right support members 82a, support plate 83, pivot 8
4, front folding member 89, article unloading device 101, conveyor 104, main drive motor 140, clutch brake 141 (main transfer device drive interrupting device), clutch brake 144 (braking device drive interrupting device), clutch brake 147 (saw) Blade drive interrupting device), product size detecting device 150, product width detecting sensor 152, product height detecting sensor 153, left and right folding member position detecting means 154, potentiometer 154A, one-step detecting encoder 160, pulse signal detecting encoder 161, first encoder 162, second encoder 163, third encoder 16
4, first sensor 165, second sensor 166, third sensor 167, microcomputer 170, CPU 171, program memory 17
2, screw rod 180, left and right support member drive mechanism 181, electric motor 181A, guide plate 183, guide groove 186, guide pin 147,
Long hole 188, link 189, packaging section S, folding section R, packaging film F, article W, drive timing TA, TB, TC, TD, TE, TF, T
G, pulse signal numerical data TM, CT.

Claims (3)

[Claims] 1. An article cradle device (4) for carrying an unwrapped article (W) and ascending the article (W) to the packaging section (S) by raising it.
6), an article supply device (45) for transferring the unpackaged article (W) to the article receiving device (46), and a film (F) stretched on the packaging section (S). ), And a film folding device (76) for folding and wrapping the lower surface of the film, the film folding device (76) includes a folding member (77) that moves back and forth in the product discharge direction, and A pair of rotation fulcrums (84) located on both the left and right sides of the folding member (77) so as to be movable in the left and right directions with respect to the article discharge direction and approaching and separating from each other based on the driving force of the driving means (181). When,
A left and right folding member (82) which is set to be rotatable in the left and right direction by the rotation fulcrum (84) and moves toward and away from each other in the left and right direction in conjunction with the forward and backward movement of the folding member (77). On the other hand, an article width detection means (152) for detecting a width (L) in the left-right direction intersecting the article (W) transferred by the article supply device (45) at a substantially right angle to the carrying direction (V) is provided. Further, the amount-of-folding control means (171) for controlling the drive means (181) based on the detection result of the article width detection means (152) to adjust the horizontal interval (Q) between the both rotation fulcrums (84). ) Is provided, the film folding amount control device in the packaging machine. 2. An article height detecting means (153) for detecting a vertical height (H) intersecting the article (W) transferred by the article supply device (45) at a substantially right angle with respect to a conveying direction (V). )
And the folding amount control means (171) drives and controls the drive means (181) based on the detection results of the article height detection means (153) and the article width detection means (152). A film folding amount control device in the packaging machine according to item 1 above. 3. The article width detecting means is provided on the substantially horizontal surface above the conveyor (45) to which the article (W) is conveyed, and the article (W).
It consists of a plurality of article width detection sensors (152) arranged side by side in a direction intersecting with the conveyor direction (V) at a substantially right angle. Each article width detection sensor (152) is a conveyor center (V1) of the conveyor (45).
The film folding amount control device in the packaging machine according to claim 1 or 2, wherein the film folding amount control device is provided side by side so as to be line-symmetrical with respect to the same transport center (V1).