JPH0427087B2 - - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention (Field of Industrial Application) The present invention is directed to, for example, a packaging machine for fresh foods, in which a packaging film stretched and gripped by the packaging portion of the machine is folded into a tray to package the product. The present invention relates to a folding device for folding.

(Prior Art) Conventionally, for example, in the packaging machine described in JP-A No. 58-90010, the packaging film stretched in the packaging section is clamped by both front and rear presser members at both edges in the width direction. When the tray on the pedestal device is pushed up to the packaging position, the packaging film is stretched to cover the tray from above, and then the packaging film is folded by the folding device below the tray. The tray is then wrapped.

That is, for example, in the folding device of the packaging machine,
The rear folding member moves forward and backward relative to the fixed front folding member, approaching and separating from each other, and the left and right folding members open and close each other as the rear folding member moves back and forth below the rear folding member. The erected article mounting table can be tilted inward by contact with the rear folding member and both left and right folding members. Then, as the rear folding member moves forward and the left and right folding members close each other, these folding members push the packaging film toward the bottom of the tray on the mounting table and contact the mounting table. Touch it and tilt it. When the pedestal device moves downward at the same time as this tilting, the tray is sequentially placed on the rear folding member from the rear side of the lower surface, and the packaging film is folded under the tray from both the rear and left and right directions. Thereafter, when the tray is conveyed forward by the rotation of the conveyor belt and transferred from the rear folding member to the front folding member, the packaging film hits the front folding member on the underside of the tray during the transfer, and the packaging film hits the front folding member and moves forward. The tray is also folded in from the bottom, and the folding from the rear is overlapped with the folding from both the left and right directions, and the folding from the front is further overlapped to form a folded portion at the bottom of the tray. Next, the rear folding member retreats, and as the rear folding member retreats, the left and right folding members also open from each other.

(Problem to be Solved by the Invention) However, the left and right folding members are supported so as to be rotatable in the left-right direction on both the left and right sides of the rear folding member, and the distance between the pivot points and the maximum distance between the tips are limited. Since the opening dimension is always constant, if the width in the left and right direction of the item corresponding between the left and right folding members changes, the bite size of the left and right folding members on both left and right sides of the lower surface of the item changes, and the packaging state is not constant. In other words, if the product width is too small, the penetration dimension will be too large and the packaging film will cover the underside of the product more than necessary, resulting in wasted packaging film.On the other hand, if the product width is too large, the penetration dimension will be too small and the packaging film will be wasted. The area covered by the packaging film decreases, and the packaging film tends to peel off from the bottom surface of the item, resulting in poor packaging conditions.

Therefore, the first method is to make it possible to adjust the maximum opening dimension between the tips of the left and right folding members, so that, for example, the length of penetration of the left and right folding members into both the left and right sides of the bottom surface of a microscopic object can be made almost constant. This is an invention. Moreover, the second invention is such that it is possible to automatically select the optimum opening size according to the width of the article in the left and right direction.

Structure of the Invention (Means for Solving Problems) Therefore, in the first invention, the rear folding member 77 moves in the front-rear direction, and the rear folding member 77 moves back and forth to move relative to the rear folding member 77. The front folding members 89 are provided so as to be movable relative to each other in the left and right direction, and are always located on both left and right sides of the rear folding members 77, and move toward and away from each other in conjunction with the back and forth movement of the rear folding members 77. These front, rear, left and right folding members 8 are provided with both left and right folding members 82.
9, 77, 82, each folding member 89, 77, 8
In a packaging film folding device having a folding part R for folding a packaging film F onto an article W by moving close to each other, the rotation fulcrums 84 of both the left and right folding members 82, which maintain a constant interval M, are close to each other. Separable left and right support members 82a, and a drive mechanism 14 that moves the left and right support members 82a toward or away from each other.
1, and a guide plate 143 that supports the guide pin 147 movably in the left-right direction on both left and right sides of the rear folding member 77 and extends from both the left and right support members 82a.
A guide groove 146 extending in the front-rear direction is formed, and the guide pin 147 is engaged with this guide groove 146, and can be rotated by a link 149 between the guide pin 147 and the distal end sides of both the left and right folding members 82. The main feature is that an interlocking mechanism is provided, which is connected to the rear folding member 77 and interlocks the left and right movement of both the left and right folding members with the back and forth movement of the rear folding member 77.

Further, in the second invention, in addition to the configuration of the first invention, there is provided a storage means 172 for storing in advance interval data between the left and right support members 82a that correlates with the lateral width L of the article W to be packaged, and the article to be packaged. Left and right side detection means 153 for detecting the left and right sides of W, and first calculation means 1 for calculating the left and right width L of the article W based on the detection signal from the left and right side detection means 153.
71, a movement amount detection means 158 that detects the movement amount of the left and right support members 82a, and a second calculation that calculates the distance M between the left and right support members 82a based on the detection signal from the movement amount detection means 158. Means 17
1 and the spacing data of the left and right support members 82a that correlates with the left and right width L of the article W calculated by the first calculation means 171, from the storage means 172;
a drive control means 171 that drives and controls the drive mechanism 141 so that the distance M between the left and right support members 82a calculated by the second calculation means 171 matches the distance data read from the storage means 172;
The main point is that it has the following.

(Function) Therefore, in the first invention, when the left and right support members are moved close to each other by the drive mechanism, the guide plate moves integrally with the drive mechanism, and the left and right folding members are further moved to the left and right support members via the link. Since they are moved close to each other in conjunction with each other, when the packaging film is folded into the product, the amount of penetration into the bottom surface of the product remains constant regardless of the size of the product. Then, the positions of both the left and right folding members are adjusted to optimal positions according to the left and right width of the item.

Further, in the second aspect of the present invention, the distance between the left and right support members is automatically selected so that the right and left folding members have an optimal distance depending on the left and right width of the article. When the drive mechanism is driven and controlled to move the left and right folding members close to each other, the guide plate moves integrally, and the left and right folding members move in conjunction with the left and right support members via links to move them closer together. Because they are spaced apart, when the packaging film is folded into the product, the size of the biting into the bottom surface of the product is automatically kept constant regardless of the size of the product. Then, the positions of both the left and right folding members are adjusted to optimal positions according to the left and right width of the item.

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

[Film folding device]

1 and 2 show a round belt type film transport device 1 installed on the upper part of the machine frame, and as shown in FIG. From this set state, the packaging film F is spread onto the packaging section S shown in FIG. 1 by the drive of the conveying device 1.

As shown in FIGS. 1 and 2, the packaging film folding device 76 is installed above the packaging film conveying device 1, and as shown in FIGS. A rear folding member 82a is a rear folding member 82a in which both sliders 79 supported so as to be movable in the front and rear direction with respect to the rear folding member 77 are connected by a connecting plate 80 and rollers 81 on both front and rear sides thereof. 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 rear ends, and are mounted on a shaft 84 so as to be rotatable in the left and right directions with respect to the lower surface of the support plate 83. It is a left and right folding member, which extends forward from the coaxial 84 attachment part (rotation fulcrum) passing below the rear folding member 77, and an auxiliary folding plate 86 is screwed to the tip part so that the position can be adjusted. . Note that the interval M between the pivot points 84 is constant.

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 the belts 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 and 90b rotate only in the direction of arrow C.

Reference numeral 140 denotes a threaded rod supported on the support plate 83 so as to extend in the left-right direction, and is formed with a left-hand threaded portion 140a and a right-handed threaded portion 140b.
2a is screwed into the left-hand threaded portion 140a, and the other support member 82a is screwed into the right-hand threaded portion 140b. 141A is the left and right supporting member 82a.
It is an electric motor installed on the machine frame at the rear of the motor, and a pulley 142a of its output shaft 141a is connected to a flat belt 142 with respect to a pulley 142b attached to a threaded rod 140 between both left and right support members 82a.
are linked via. This interlocking motor 141
When the threaded rod 140 is rotated by A, both the left and right support members 82a have both left and right threaded portions 140a, 140b.
move toward or away from each other. and,
The screw rod 140, the electric motor 141A, the flat belt 142, and the like constitute a drive mechanism 141 for the left and right support members 82a.

In FIGS. 3, 4, and 5, reference numeral 143 denotes an L-shaped guide plate fixed to the front portions of the left and right support members 82a, and a base plate portion 143a extending to both left and right sides.
and an engagement plate portion 143b extending forward along the rail 78 from its tip.
A roller 144 attached to the tip of the roller 43b is supported so as to be movable in the left-right direction with respect to a rail portion 145 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 143 also move in the same direction with this movement. 146 is the engagement plate portion 1 of the guide plate 143
43b, a guide groove 147 is formed to extend in the front-rear direction, and a guide pin 147 is engaged with the guide groove 146. The guide pin 147 is protruded from the slider 79 of the rear folding member 77 below the engagement plate portion 143b. It is supported movably in the left and right direction with a long hole 148 relative to the projecting plate portion 79a. A link 149 is rotatably supported between the lower end of the guide pin 147 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 147 moves against the guide plate 14.
3, the left and right folding members 82 rotate about the pivot point 84 by the link 149 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
47 moves along the elongated hole 148 of the slider 79, the guide plate 143 and the guide pin 147 move in parallel in the left-right direction while maintaining the same positional relationship, and both the left and right folding members 82 move through the link 149. to open and close. Note that the guide plate 143, guide groove 146, guide pin 14
7. Link 149 and long hole 148 of slider 79
etc., the rear folding member 77 and both left and right folding members 82
An interlocking mechanism is constructed between the two.

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 7
7 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 downward from this state, the rear folding member 77 is pushed forward by the lever 97 and the link 98 as shown in FIG. The position of the groove 146 is regulated and both the left and right folding members 82 are connected to the link 14.
The folding members 89, 77, and 82 are closed to each other via the folding members 9, and a folding portion R is formed between these folding members 89, 77, and 82. As shown in FIG. 1, this folding section R corresponds to the packaging section S of the packaging film conveying device 1.

[Goods unloading device]

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 103 with shafts 116a and 166b. 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.

When the handle 118 is rotated, the connecting rod 117 moves along the threaded rod 118a, and the interlocking link 11
6 moves in the vertical direction, and while the roller 120 of the interlocking link 116 slides on the guide plate 115 of 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 delivery direction E via the belt 110 and the belt pulley 108. However, since the sprocket 111 is supported on the spindle 103 by a one-way clutch 111a, the rotation of the chain 112 is caused by the rotation of the sprocket 1.
11 and the belt 10 of the conveyor 104
4a does not rotate in reverse.

[Means for detecting the amount of movement of both the left and right sides of the product and the left and right support members]

1, 6, and 7, reference numeral 45 denotes a belt conveying type article supplying device installed below the film conveying device 1 both inside and outside the machine frame, and 150 denotes a belt conveying type article supplying device extending in the front and back direction on both left and right sides of the article supplying 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. 1
53A is a first potentiometer (left and right side detection sensor) attached to one side of the article supply device 45, and a rotation operation shaft 154 is interlocked with this potentiometer.
is supported on the lower surface of the article supply device 45 so as to extend in the left-right direction, and the rotation operation shaft 154 is formed with a left-hand threaded portion 154a and a right-handed threaded portion 154b. 155 denotes this left and right screw portion 154a,
154b, and a link 156 is rotatably supported between the support shaft 151 and a lever 151a which can rotate integrally therewith. When the handle 157 of the rotation operation shaft 154 is turned, the moving blocks 155 on the same shaft 154 move toward and away from each other, and both guide rods 150 on the article supply device 45 also move through the link 156, the support shaft 151, and the link 152. and move toward and away from each other, and the rotational displacement of the rotational operation shaft 154 is transmitted to the first potentiometer 153A. Therefore, when both guide rods 150 are aligned with both left and right ends of the article W placed on the article supply device 45, the distance between the guide rods 150, that is, the width L in the left-right direction of the article W.
The detection signal proportional to the first potentiometer 1
53A is designed to detect it. Then, both the guide rods 150, the first potentiometer 1
53A, rotation operation shaft 154 and moving block 15
5 and the like constitute the left and right side detection means 153.

As shown in FIGS. 3 and 5, reference numeral 158A is a second potentiometer (movement detection sensor) installed on the support plate 83 corresponding to one end of the threaded rod 140. 15
9,160. When the threaded rod 140 is rotated by the electric motor 141A, the rotational displacement of the threaded rod 140 is transmitted to the second potentiometer 158A. Therefore, the second potentiometer 158A detects a detection signal compared to the distance N between the left and right support members 82a. The threaded rod 140, the second potentiometer 158A, and the like constitute a means 158 for detecting the amount of movement of the left and right folding members 82.

[Peripheral equipment]

As shown in FIGS. 1, 6, and 7, reference numeral 46 denotes an article receiving device that is moved up and down between the inner end of the article supply device 45 and the packaging section S and the folding section R, and is attached so as to be tiltable. The article W is transferred from the article supply device 45 and placed thereon at the lowest moving position, and is positioned by a stopper 47.

In FIGS. 1 and 2, reference numeral 26 denotes a front press member attached to the front side of the packaging section S of the packaging film conveying device 1, and numeral 37 denotes a rear press member attached to the rear side of the packaging section S. Both front and rear edges of the packaging film F stretched are pressed against these pressing members 26,
37. Reference numeral 43 denotes a saw blade mounted near the film supply port P of the packaging film conveying device 1, and is adapted to form perforations at every predetermined length of the packaging film F during its conveyance. 48 is a heater device on which the packaged goods carried out from the front folding member 89 are placed.

[Calculation, storage and control means]

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

In FIG. 8, a microcomputer 170
consists of a central processing unit (hereinafter referred to as CPU) 171, a program memory 172 consisting of read-only memory (ROM), and a working memory 173 consisting of readable and rewritable memory (ROM), and is installed in the packaging machine. It is built into a control box (not shown). And CPU17
1 operates based on a control program stored in program memory 172. In addition to the control program, the program memory 172 stores the optimum left and right information between the left and right folding members 82 corresponding to the width L in the left and right direction of the article W when the unwrapped article W is sent to the folding section R. Spacing data between both folding members 82 is stored in advance (storage means). That is, when the values obtained by dividing the horizontal width L of the item W into certain ranges are L1, L2... (L1<L2), the interval N (interval data) between the left and right supporting members 82a is N1,
N2...(N1<N2) is selected.

The first potentiometer 153A is the item W.
It serves as a sensor for detecting both the left and right sides of the vehicle.
That is, as described above, the article supply device 4
5. Both guide rods 15 are placed on both the left and right edges of the item W placed on top.
0, the detection signal of the first potentiometer 153A, which is proportional to the horizontal width L of the item W, is
It is designed to be input to the CPU 171. Then, the CPU 171 calculates the width L in the left-right direction of the article W based on this input signal (first calculation means). The result of this calculation is temporarily stored in the working memory 173.

Further, the second potentiometer 158A serves as a sensor for detecting the amount of movement of both the left and right support members 82a. That is, as described above, the detection signal of the second potentiometer 158A is input to the CPU 171 in proportion to the distance N between the left and right support members 82a. And CPU171
is adapted to calculate the interval M based on this input signal (second calculation means). The result of this calculation is temporarily stored in the working memory 173.

Furthermore, the CPU 171 has the working memory 17
The interval data of the left and right folding members 82, which is pre-stored as an optimum value corresponding to the horizontal width of the article W (the calculation result by the first calculation means) temporarily stored in No. 3, is read from the program memory 172, and this interval is calculated. The data is compared with the distance N between the rotational fulcrums 84 of the potentiometer 82a temporarily stored in the working memory 173, and the electric motor 141A is driven and controlled so as to match them ( drive control means). That is,
By this drive control, as shown in FIG.
When the width L in the left-right direction is large, the distance M also becomes large, and conversely, as shown in FIG. 5, when the width L is small, the distance N is also small.

In addition, since it is necessary to select the film length according to the width L of the article W in the lateral direction, the left and right side detection means 153 uses the width L of the article W in the lateral direction.
Using the film length setting dial that allows you to select any film length according to the film length, the detection signal from the same dial can be set according to the film length.
The information may be input to the CPU 171.

[Packaging action of the example]

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

Before operation, when an item W (a tray containing items) is placed on the item supply device 45 and both guide rods 150 are aligned with the left and right edges of the item W, as described above, the width of the item W in the lateral direction is The distance N between the left and right support members 82a is adjusted according to L.

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 connected to the interlocking rod 96.
It retreats due to the upward movement of.

When the film transport device 1 is driven in synchronization with this feeding, the packaging film F located at the supply port P is
The starting end of is transported toward the packaging section S in the center of the transport device 1. On the way, the sawtooth 4
3, perforations are formed in the width direction at every fixed length of the packaging film F, and an instantaneous brake is applied at the supply port P to pull the packaging film F.
Due to this tensile force, it is cut at the perforations and conveyed to the top of the packaging section S.

The packaging film on the packaging section S is held by the upward movement of both the front and rear pressing members 26, 37.

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 both left and right folding members 82 enter below the article W, and the pedestal device 46 moves downward again, the article W is placed on the rear folding member 77 and backwards under the article W. The folding operation of the packaging film F is performed from both left and right directions. In synchronization with this folding operation, the clamping by the rear presser member 37 is released, and the front presser member 26
Maintain only clamping by.

After that, when the belt 104a is rotated and the clamping by the front presser member 26 is released,
The article W is conveyed forward and transferred from the rear folding member 77 onto the front folding member 89. 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 and one process is completed.

Note that when the left and right side detection means 153 of the article supply device 45 are operated during operation, the left and right folding members 82 operate at the adjusted positions from the next step.

As detailed above, in this embodiment, the distance N between the left and right support members 82a can be adjusted, so the optimal position of the left and right folding members 82 can be selected according to the width L in the left and right direction of the article W. can do.
For example, as shown in FIGS. 3 and 5, even if the width L in the left-right direction of the article W changes, the distances between the left and right folding members 82 and the left and right edges of the article W can be kept almost constant. As a result, the penetration dimensions of the left and right folding members 82 into both left and right sides of the lower surface of the article W can be made almost constant, and the packaging condition becomes uniform and good regardless of the width L of the article W in the left-right direction.

Further, the optimum interval N can be automatically selected based on the program memory 172 according to the width L in the left and right direction of the article W, and the work of adjusting the positions of both the left and right folding members 82 is greatly facilitated.

In the embodiment described above, the electric motor 141A was used as the drive mechanism 141 for the left and right folding members 82a in order to automate the position adjustment work of the left and right folding members 82 according to the width L in the left and right direction of the article W. , a handle, or other manual adjustment means may be used. However, in this case, automation of the same position adjustment work is not considered.

Effects of the Invention As detailed above, according to the first invention, both the left and right sides of the lower surface of the article can be moved by simply moving the left and right support members closer to or apart from each other using a drive mechanism according to the left and right width of the article. It is possible to select the positions of both the left and right folding members where the insertion dimensions are optimal, and it is possible to obtain a good packaging condition for the article with only a very simple adjustment operation.

Further, according to the second invention, in addition to the effects of the first invention, it is possible to automatically select the optimum position of the left and right folding members according to the left and right width of the article based on the stored data, and the left and right folding members position adjustment work can be performed easily and accurately.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional view showing the side surface of a fresh food packaging machine using the packaging film folding device according to the present embodiment, and FIG. 3 and 5 are schematic plan views showing the folding device, FIG. 4 is a partial cross-sectional view showing the interlocking mechanism of the folding device, FIG. 6 is a plan view showing the article supply device, and FIG. 7 is the same device. FIG. 8 is a sectional view showing a side view of the device, and FIG. 8 is an electric block circuit diagram. Film conveyance device...1, Product supply device...4
5. Product holder device...46. Film folding device...
...76, Rear folding member...77, Rail...78,
Both left and right folding members...82, both left and right support members...8
2a, Support plate...83, Rotation fulcrum...84, Front folding member...89, Article delivery device...101, Conveyor...104, Threaded rod...140, Left and right support member drive mechanism...141, Electric motor...141
A. Guide plate...143, Guide groove...146,
Guide pin...147, long hole...148, link...149, guide rod...150, left and right side detection means...153, first potentiometer...
153A, rotation operation axis...154, moving block...155, movement amount detection means...158, second potentiometer...158A, microcomputer...170, CPU...171 (first and second calculation means and drive control means), program memory...172 (storage means), packaging section...S,
Folding part...R, Item...W, Packaging film...
F.

Claims (1)

[Claims] 1. A rear folding member 77 that moves in the front-rear direction, and a rear folding member 77 that moves back and forth.
The front folding member 89 approaches and separates from the
and left and right folding members 82 which are provided so as to be relatively movable in the left and right direction, are always located on both the left and right sides of the rear folding member 77, and move toward and away from each other in conjunction with the back and forth movement of the rear folding member 77. A packaging film folding device having a folding portion R between these front, rear, left and right folding members 89, 77, 82 in which the folding members 89, 77, 82 approach each other and fold the packaging film F into the article W. , the pivot points 84 of the left and right folding members 82 that maintain a constant interval M, and the left and right support members 82a that can move toward and away from each other.
A drive mechanism 141 for moving the left and right support members 82a toward or away from each other; and a drive mechanism 141 that supports a guide pin 147 movably in the left-right direction on both left and right sides of the rear folding member 77, and extends from the support members 82a. A guide groove 146 extending in the front-rear direction is formed in the guide plate 143, and the guide pin 147 is engaged with the guide groove 146, and a link 149 is used to connect the guide pin 147 and the distal ends of the left and right folding members 82. A packaging film folding device for a packaging machine, comprising an interlocking mechanism that is rotatably connected and interlocks the left and right movement of both left and right folding members with the back and forth movement of the rear folding member 77. 2 The drive mechanism 141 has a left threaded portion 140a and a right threaded portion 140 on a threaded rod 140 supported on the support plate 83.
b, and one support member 82a is screwed to the left-hand threaded portion 140a, and the other support member 8
2a to the right-hand threaded portion 140b, and
40 is rotatable by an electric motor 141A. The packaging film folding device in a packaging machine according to claim 1. 3. The rear folding member 77 moves in the front-rear direction, and the rear folding member 77 moves back and forth.
The front folding member 89 approaches and separates from the
and left and right folding members 82 which are provided so as to be relatively movable in the left and right direction, are always located on both the left and right sides of the rear folding member 77, and move toward and away from each other in conjunction with the back and forth movement of the rear folding member 77. A packaging film folding device having a folding portion R between these front, rear, left and right folding members 89, 77, 82 in which the folding members 89, 77, 82 approach each other and fold the packaging film F into the article W. , the pivot points 84 of the left and right folding members 82 that maintain a constant interval M, and the left and right support members 82a that can move toward and away from each other.
A drive mechanism 141 for moving the left and right support members 82a toward or away from each other; and a drive mechanism 141 that supports a guide pin 147 movably in the left-right direction on both left and right sides of the rear folding member 77, and extends from the support members 82a. A guide groove 146 extending in the front-rear direction is formed in the guide plate 143, and the guide pin 147 is engaged with the guide groove 146, and a link 149 is used to connect the guide pin 147 and the distal ends of the left and right folding members 82. An interlocking mechanism that is rotatably connected and links the left and right movement of the left and right folding members with the back and forth movement of the rear folding member 77, and an interval between the left and right folding members 82a that correlates with the left and right width L of the item W to be packaged. a storage means 172 for storing data in advance; a left and right side detection means 153 for detecting left and right sides of the item W to be packaged; and a left and right width of the item W based on a detection signal from the left and right side detection means 153. A first calculation means 171 that calculates L; A movement amount detection means 158 that detects the movement amount of the left and right support members 82a; and A distance between the left and right support members 82a based on the detection signal from the movement amount detection means 158. A second calculation means 171 that calculates N; and a second calculation means 171 that reads interval data of the left and right support members 82a that correlates with the left and right width L of the article W calculated by the first calculation means 171 from the storage means 172, and performs the second calculation. It is characterized by comprising a drive control means 171 for driving and controlling the drive mechanism 141 so that the distance N between the left and right support members 82a calculated by the means 171 matches the distance data read from the storage means 172. Packaging film folding device for packaging machines.