JPS5837168B2 - Folding packaging device in packaging machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a packaging machine for packaging products such as meat, fish, bread, etc. in a pond of fruits and vegetables such as eggplant, cucumbers, and apples using a film-like packaging material. The present invention relates to a folding packaging device that covers and wraps an article while folding the folding section of the material, and an object of the present invention is to appropriately fold the packaging material to the article and to use the minimum necessary size of the packaging material. The goal is to neatly wrap the entire surface of the item without leaving any parts unwrapped.

The present invention will be explained below with reference to Examples.

The packaging machine of this example, which is schematically shown in FIGS. 1 and 2, is composed of various process sections involved in supplying, packaging, and carrying out products and packaging materials. First, the product supply section shown in FIGS. On the side,
In the supply mechanism 1, between the chain wheels 3, 3 at both ends of each rotating shaft 2, 2 {
The chains 4, 4 are hung in an endless triangular shape, and in each section between the chains 4, 4, a feed table 5 consisting of a large number of round rods 5a arranged in parallel is arranged at equal intervals. The product W is loaded from outside the machine (assuming that fruits and vegetables W2 are placed on a plate W1).

) is transferred onto the feed table 5 and supplied to the push-up supply section, which will be described later.

The push-up supply mechanism 6 is constructed by mounting a cradle 10 on the upper end of a lifting rod 9 that is vertically articulated and supported by upper and lower tilting rods 7 and 8 of a parallel crank mechanism connected to the drive unit side. Before operation, the receiving stand 10 is placed on standby at a receiving position facing the horizontal part of the chain 4 of the supply mechanism 1, and during operation, the goods W from the feeding table 5 are received onto the receiving stand 10. Push up to the upper enclosing part (on the side of the relaxation and delivery mechanism 120, which will be described later).

The pedestal 10 of such a mechanism 6 has a stationary holder piece 10B approximately in the center on a rectangular base 10A connected to the upper end of the lifting rod 9 as shown in FIG. It stands up removably through a pin 10b, and three rows of hook-shaped tilting movable receiving pieces 10c and IODs are arranged on the front and both sides and are arranged at approximately the same height.

The movable receiving pieces 100 and 10D of the valley row are both based on the base 10A.
The stopper 1 is disposed on the rotary cylinders 10E and 10E, which are pivoted parallel to each other and urged by the header 10F.
0G, 1 It is maintained standing by 0G.

However, the shape of the packaging material folding tool 110, 113 mentioned above,
In consideration of movement, etc., in the front movable receiving piece 100, the required number of rotating cylinders 10E are shortened in the order of front row, middle row, and rear row from the left in the figure and are arranged in parallel with the center as a reference, and are arranged at equal intervals, and are spaced apart from each other. On the other hand, in the movable receiving piece 10D on both sides, the rotating cylinders 10 are shortened in the order of outer row, middle row, and inner row, and are arranged in parallel with one side as a reference.
They are placed at E and arranged in a staggered manner.

Note that reference numeral 11 indicates an article stopper installed on the side of the receiving standby position of the mechanism 6.

On the packaging material supply section side shown in FIGS. 4 to 7, 12 is a feeding device installed on the right side of the machine body F, and first and second feeding mechanisms 13 and 14 are set on the upper and lower sides.

The respective feeding mechanisms 13 and 14 are in different states because they are used interchangeably, but have the same structure.

That is, in each mechanism 13, 14, a pair of support brackets 15.
1. A rotating shaft 16 is horizontally mounted between the 15 tips in a removable manner from above and below and is supported by rollers 15a, 15a.A film-like packaging material P is placed on the outer periphery of the cylinder 16a on this rotating shaft 16 , P2 is continuously wound to form a packaging material body P, ,
P2 is attached to chucks 17 and 17 on both ends of the rotating shaft 16 (however, one is fixed and the other is removable).

) is set so that it can be attached and detached.

And for each of these packaging material bodies P, , P2,
A tension adjustment guide means and a braking means are both equipped.

For the above guide means, both support brackets 15.15
A pair of tilting support rods 19 at both ends of the rotating wheel 18 supported between the tips.
, 19 are connected to each other, and a guide roller 20 is supported between the tips of both support rods 19, 19, and a support piece 2 has a cam 21, a leaf spring 23, and a regulating sweat 24 at one end of the rotating shaft 18.
2 are fixed to each other.

Note that 25 indicates a stopper pin for each leaf spring 23.

On the other hand, regarding the braking means, both support brackets 15.1
An L-shaped arm 2 is attached to one end of the support shaft 26 that is horizontally suspended between the 5 tips.
7 is pivotally fitted and is always energized counterclockwise in FIG. A brake shoe 30 is attached to the drum 29 via a support rod 31, and the cam 2 on the guide means side is attached to the long side.
The trochanter 32 is attached to the trochanter 32 relative to the trochanter 1.

Therefore, each payout mechanism 13.14 configured as described above.
As shown in FIG.
3, the upward tilting movement of the tilting support rod 19 is regulated, and the guide roller 20 is positioned above the packaging material P1 while hanging thereon, thereby guiding the packaging material P and adjusting the tension thereof.
Also, by holding the cam 21 in contact with the trochanter 32, the arm 2
7, the support rod 31 is tilted upward against the torsion spring 28, and the brake shoe 30 is waiting to be released above the brake drum 29.

On the lower second side, on the contrary, the guide roller 20 tilts under its own weight while hanging the package P2 and is positioned downward via the regulating rod 24, and the brake shoe 30 is applied to the brake drum 2 by the torsion spring 28.
9 to brake the packaging material body P2.

Note that the packaging material P in each of the above-mentioned feeding mechanisms 13 and 14.
As for P2, the first side is wide and the second side is narrow, and its feeding form is as shown in the figure by the intermediate roller 33,
33 to respective delivery guides 47 and 48, which will be described later.

Reference numeral 34 denotes a feed exchange device installed diagonally above the feeding device 12, and the operating section of this device 34 is located on the machine frame F.
A rotating shaft 36 is supported between a pair of support arms 35 and 35 fixedly supported on both inner sides of The piston rod 4 of the air type operating cylinder 41
2 are connected via a connecting ff43.

In addition, regarding the supply guide exchange section, an endless chain 45.
45, and first and second delivery guides 47, 48 are arranged between both chains 45, 45.

Note that 46 is a guide chain wheel disposed on each support arm 35, 35.

The respective feed guides 47, 48 are of the same construction, and as is clear from FIGS. 6 and 7, both the chains 45. A rubber lower roller 51 is supported between a pair of support plates 49 and 49 connected to each support plate 49 and 45.
A metal upper roller 52 is supported between the movable branches 50 and 50, which are pivoted to the base plate 50A and biased downward (counterclockwise) in FIG. 7 by a spring 50B. Normally, they are elastically arranged in contact with each other so that the packaging material is held in place to prevent it from being pulled out in the counter-feeding direction.

However, both rollers are supported to rotate in one direction by means for preventing reverse rotation.

In addition, the supporting plates 49 on both sides are connected to each other. Between 49 and 5 movable branches
Between 0 and 50, continuous uneven guide portions 53a and 54a
It is constructed by disposing dispensing guide plates 53 and 54, each having an upper and lower part, facing each other with an appropriate gap between them.

In the feed exchange device 34 configured as described above, the first and second feed guides 47 are activated by the operation by the operation operation section.
．． 48 can be rotated upward and downward, but the upper part in FIG. ，
The end of P2 is held in a state of being held in its mouth between both delivery guide plates 53 and 54.

In addition, in each feeding guide device, when the packaging material is first held in the mouth, the upper roller 52 is once lifted up against the spring 50B together with the upper feeding guide plate 54 connected between the movable branches 50, 50. , the packaging material can be held in the mouth by pulling it out onto the lower feed guide plate 53 and the lower roller 51 and then releasing it.

The packaging material drawer and extension parts shown in FIGS. 8 to 12 each include a drawer part, an extension part, a rear presser part, and a part of a cutter each having a clamping function.

On the drawer section side located above the above-mentioned article supply section side, 55 is a reciprocating mechanism, and this mechanism 55 is located at the front and rear (left and right in the figure) above the machine frame F as shown in FIGS. 8 and 9. Chain wheels 58, 58 at both ends of the supported rotating main shaft 56 and the rotating spindle 5
Chain wheels 59, 59 at both ends (however, they are fitted together by bearings, etc.).

), and the rotating main shaft 56 side carries a small gear 72D, a large gear 720, a chain wheel 72B, and a chain 72A, which constitute a transmission mechanism for a drive section 61, which will be described later. are connected via.

The packaging material clamp drawer 62 connected to the above-mentioned reciprocating mechanism 55 is connected to each of the above-mentioned chains 60 . An upper fixed clamp plate 64 is fixedly supported between both support plates 63 and 63 connected to the 60, and a lower continuously uneven opening/closing clamp plate 65 is pivotally supported 66, and this opening/closing clamp plate 65 is , is connected via a link 69 to a piston rod 68 of an air-type operating cylinder 67 installed on one support plate 63.

Then, facing each support plate 63, 63 is a synthetic resin guide element 70 for anti-swing. 70 are connected and are adapted to be guided in transition along respective guide rails 71.71 arranged parallel to the chains 60.60 of each row.

In the clamp drawer 62, the lower surface of the fixed clamp plate 64 is partially recessed so as to fit with the feed guide plate 53 of each feed guide device 47, 48, and the opening/closing clamp plate 65 is partially recessed. A thin spring plate 65A having a continuous uneven shape and having a rubber sheet 65a attached thereto is attached to the upper surface.

Before operation, the clamp drawer 62 is in an expanded state on standby in the left direction in FIG. It can be adjusted based on the forward end position.

That is, as the adjusting means, a three-way lever 74 having a chain 72A suspended on a rotation shaft 73 supported by the machine frame F is pivotally fitted on the driving part 61 side as shown in FIGS. 8 and 9. A screw rod 75 to which a screw gear 76 is fixed is vertically supported on the hanging piece of this lever 74, and a link rod 78 connected to the drive section side of the pond is connected to an elevating screw tube 77 screwed onto the screw rod 75. Screw gear 7 articulated and pivotally fitted on rotation shaft 73
9 is meshed with the screw gear 76, and also with the screw gear 80 supported on the upper fixed bracket F1.

Then, the operation handle 81, which is supported so as to be movable by operation from the outside with respect to the fixed bracket F1 and is always biased to the left in FIG. 8, is engaged with the screw gear 80 and rotated. By doing so, the screw rod 75 is rotated to a fixed position via the screw gears 79 and 76, and the elevating screw tube 77 is moved up and down accordingly, and the connection point of the link rod 78 with respect to the three-way lever T4 is changed, and the three-way lever By changing the amount of rotation of T4, the clamp drawer 62 can be adjusted to an appropriate position on the left or right side in FIG. 9 by rotating the reciprocating mechanism 55 via the transmission mechanism.

In the expansion section located on both sides of the front (right side in FIG. 8) of the packaging material drawer described above, reference numeral 82.82 denotes a pair of left and right expansion mechanisms, and both mechanisms 82.82, as shown in FIG. 11,
Both have the same structure, and the swinging arms 83, 83, which are vertically mounted and pivotally mounted on the machine frame F, are moved inwardly and outwardly from each other via a link mechanism 85 by the vertical movement of a link rod 84 connected to the drive unit side. It is set so that the synchronized sheath closing swings outward.

Each of the swing arms 83, 83 has a fixed clamp piece 86, 86 and an opening/closing clamp piece 87, 8 at the upper end.
7 are cantilevered inside, and each opening/closing clamp piece 87 . 87, piston rods 89, 8 of air-type operating cylinders 88, 88 installed on each arm 83, 83.
Clamp means connected to 9 for opening and closing movement are symmetrically provided.

In addition, in the above-mentioned clamping means, the fixed clamp piece 86
The lower surface is made of flexible cloth, synthetic resin, etc.}86
A is attached to the opening/closing clamp piece 87, and a mat 87a made of sponge covered with cloth or the like is attached to the upper surface of the opening/closing clamp piece 87.

90 is a clamp presser, which is located in front of the supply exchanger 34 (on the left in FIG. 8) facing the clamp drawer 62 and presses the rear part of the packaging material;
As shown in FIGS. 8 and 12, a support plate 93 is connected to a support rod 92 pivotally fitted to the center of a rotating shaft 91 supported by a machine frame F, and the support plate 93 is configured in a T-shape. The rod 92 is the piston rod 9 of an air-type operating cylinder 94 installed below.
5, it is connected via a connecting rod 96 and rotated toward a fixed receiving plate 97 installed above to press down the packaging material.

A mat 93a is attached to the upper surface of the holding plate 93, and a sheet 97a is attached to the lower surface of the fixed receiving plate 97.

A cutter device 98 is equipped with the above-mentioned rear presser section.

As shown in FIGS. 8 and 12, this device 98 has a saw blade-like knife 100 fixed between the tips of a pair of support arms 99 and 99 fixed to both ends of the rotating shaft 91 of the clamp holder 90. Connecting piece 1 fixed to one end of rotating shaft 91
01 is connected to a link rod 102 that is connected to the drive unit side.

In this cutter device 98, before operation, the knife 100 is waiting above the first feed guide 47 of the feed exchange device 34 as shown in the figure.
The packaging material is cut when the front of the delivery guide 47 is tilted downward.
Reference numeral 103 denotes a reciprocating mechanism located above the above-mentioned extension section side, and as shown in the figure, this mechanism 103 is connected to the chain wheels 105, 105 at both ends of the rotating main shaft 104 above the machine frame F, and the rotating support shaft 5.
Chain wheels 105 and 106 at both ends of 7 (however, they are fitted together by bearings, etc.).

), and the rotating main shaft 104 side is connected to the drive unit side via a transmission mechanism 10B using a chain wheel and a chain.

A folding device 109 is connected to the reciprocating mechanism 103 described above.

The folding device 109 includes a front folding tool 110 for the front edge of the packaging material, and an opening/closing folding tool 113 (also called a lateral folding tool) for the both side edges of the packaging material.

), and the front folding tool 110 is equipped with a support plate 111 of the chains 107, 107 as shown in the figure.
, 111 at the center of the support plate 112.
, 110a, a large number of round bars 1 1 0b , 1 1
0b are connected in parallel, and the same folding tool 1
Regarding the opening/closing folding tool 113 located below 10,
A pair of left and right folding plates 115, 115 are horizontally attached to the center of the fixed plate 114 located below the support plate 112, and one end is pivoted 116, 116, and the end is connected to each support plate 111.
, 111 are connected and supported by connecting rods 117 and 117, and by mutually synchronized advancement and closing operations of both folding tools 110 and 113, the item W on the pedestal 10 is
Interlocking with each other from the front and both sides of the packaging material,
It is set to perform a so-called three-way folding action.

Squeezing pieces 115a, 115a are attached to the lower surfaces of the tips of both folding plates 115, 115 of the opening/closing folding tool 113 in a horizontally protruding state.

These two narrowing pieces 115a, 115a are
A large number of screw holes 11 are arranged in the plate 115 as shown in the figure.
5b and bolts} 1 1 5c are attached so that their positions can be adjusted in the inside and outside directions, so that the distance between them facing each other can be changed. , the edge of the pond (in this example, it is the edge that will be finally folded in).

) is tightened to a predetermined position on the inside while holding both edges of the item, and the edges are held at a suitable required width so that they do not protrude from the bottom of the item and do not expose the bottom. There is.

However, both of the narrowing pieces 115a, 115a can be changed to multiple positions suitable for the size of the packaging material for the item, and are normally set at symmetrical positions with respect to each other.

Note that the folding device 109 has each support plate 111, 1
11 and guide rails 119, 119 allow for quick transition guidance.

In the unloading section shown in FIGS. 14 to 16, reference numeral 120 denotes a relaxation feeding mechanism capable of parallel lifting and lowering, which is installed at the lifting standby position of the article W on the push-up feeding mechanism 6 side. It is constructed based on a joint parallel link mechanism.

That is, the rotary main shaft 122 is supported between the tips of cylindrical support arms 121, 121 which are supported by bearings in a cantilever shape on both ends of the rotary support shaft 57, and the support brackets 123, 123 are pivotally fitted to both ends of the rotary main shaft 122. , Sending mode structure 13 described later
The support body 138 on the 7 side is supported via link rods 124, 124 to the brackets 139, 139 on both sides, and is also supported on the machine frame F side via a tension spring 125.

A rotary slave shaft 127 is supported between the tips of a pair of support rods 126, 126 connected to each support bracket 123, 123, and pulleys 128, 1 fixed to both shafts 122, 127.
Between 29 and 29, a relaxation belt 13 made of sponge and having a circular cross section is provided.
0,130 are stretched in three rows as shown.

Note that this mechanism 120 is hooked and held at the lowest position due to its own weight.

A first drive unit for the above-mentioned conveyor part side is provided.
As shown in FIGS. 5 and 16, the main screw gear 131 fixed on the rotating support shaft 57 and one screw gear 133 of the transmission shaft 132 inserted and supported in one of the support arms 1"21 are meshed, Further, the other screw gear 134 of the transmission shaft 132 is meshed with the screw gear 135 of the rotation main shaft 122.

Note that the rotation support shaft 57 is a crank mechanism (not shown).
It is connected to the side via a transmission mechanism 136 consisting of a chain and a chain wheel.

137 is the front of the relaxation supply mechanism 120 (right side in Fig. 14)
A large number of bells N4L1 are installed between both rotating shafts 140, 140 supported between both side plates 138a, 138a) of a support 138 fixedly supported on the machine frame F side.
41 are stretched in parallel, and one rotating shaft 140 (on the right in FIG. 18) is connected to the main roller 149 on the rotating support shaft 57 via a transmission stage 142 for relaxation feeding. It is configured to operate in synchronization with the mechanism 120 side.

Reference numeral 143 denotes a sailing guide mechanism installed in front of the relaxation and feeding mechanism 120, in which a pin 144 is fixedly supported in front of the rotating slave shaft 127 by spring rods 145, 145 which are normally biased downward, and the pulley 129 is and pulley 1 pivoted onto pin 144.
45, with belts 146, 146 stretched between them, so as to operate in synchronization with the relaxation feed mechanism 120.

Reference numeral 148 denotes a feeding guide mechanism installed in front of the feeding machine 137 (on the right side in FIG. 14), which connects the main roller 149 on the rotating support shaft 57 and the connecting plate 151 fixedly supported on the machine frame F side. Support rods 152, 152 with suppression springs 153
A flat belt 154 made of Teflon is stretched between the roller 150 and a follower roller 150 supported by the roller 150 to operate in synchronization with the delivery mechanism 137.

In addition, in this mechanism 148, a heater 155 is installed on the connecting plate 151 to heat and keep the flat belt 154 warm.

156 is a pin arranged on the flat belt 154, 157 is the main pin,
Holes provided on the outer periphery of the follower rollers 149, 150 are shown to prevent the flat belt 154 from meandering, wobbling, etc.

In the packaging machine of this embodiment constructed as described above, the article W is packed and unloaded based on the set operation order of each part as shown in FIG. 17.

First, on the article supply section side, the article W on the feed table 5 is pushed up by the operation of the supply mechanism 1 to the pedestal 10 of the push-up supply mechanism 6.
It is horizontally fed toward the side, stopped by a stopper 11, and placed on standby on a pedestal 10.

In synchronization with the above-mentioned article supply operation, the packaging material is pulled out at the packaging material drawer extension section side.

That is, due to the forward movement of the reciprocating mechanism 55 on the drawer section side due to the rotation of the three-way lever 74 on the drive section 61 side, the clamp drawer 62 opens the supply exchange device 34 with its clamping means in an expanded state. It moves forward toward the first delivery guide 47 and reaches the delivery guide plate 53, 54 portion of the first delivery guide 47 as shown in FIG.

In this position, the clamp drawer 62 is closed by the pushing operation of the operation cylinder 67, and both clamp plates 64. 65, the first feeding mechanism 13 held between both feeding guide plates 54 and 54 of the first feeding guide 47
The end of the packaging material P from the side is smoothly clamped with an appropriate elastic force via a spring plate 65A having a seam 65a.

Thereafter, as the reciprocating mechanism 55 resumes operation, the clamp drawer 62 retreats and waits at its original position while pulling out the first packaging material P1 from the first delivery guide 47 without any force.

In addition, in response to this pulling-out operation of the packaging material, on the side of the first feeding mechanism 13 of the feeding device 12, as shown in FIG. The body P1 rotates lightly, and the packaging material P1 is pulled out and guided while being held at an appropriate tension by the guide roller 20 of the tension adjustment guide means. It is something that is held and guided.

After the above-mentioned packaging material has been pulled out, the pair of left and right expansion mechanisms 82, 82 swing inwardly toward each other, that is, toward the packaging material P, as the drive section operates on the expansion section side, so that the expansion mechanism 82, which is still in the expanded state, swings toward the inside of the packaging material P. Both fixed and open/close ramp pieces 86. When each side edge of the packaging material P is sandwiched between the clamps 87 and 87, the rear presser side is activated until the respective clamping means clamp the packaging material P1.

That is, on the rear presser side, the clamp presser 90 is rotated upward by the pushing operation of the operating cylinder 94,
The holding plate 93 actively pulls up the rear end of the packaging material P, and the fixed receiving plate 97 clamps it through the mat 93a and the sheet 97a without any force to the clamp drawer 62. The packaging material P1 is stretched and held in the length direction thereof.

At the same time as the above-mentioned packaging material rear pressing operation ends, the cutter device 9
8, the knife 100 is rotated counterclockwise in FIG. 8 as the drive unit operates, and the knife 100 is rotated counterclockwise in FIG. After cutting the part in between, it is rotated back to its original position.

As mentioned above, at the time when the operation of holding down and cutting the packaging material P1 is completed, in the above-mentioned both stretching mechanisms 83, 83, each crank means is activated by the operation cylinder 88, 88.
The opening/closing clamp pieces 87 are closed by the narrowing/closing rotation of the clamp pieces 87 and 87 due to the extrusion operation of the opening/closing clamp pieces 87, and the opening/closing clamp pieces 87 are closed to seal both side edges of the packaging material P1}86
a and the mat 87a, it is clamped without any force,
In this state, the packaging materials P are again swung outward from each other.
1. Slightly expand it in the width direction.

As a result, the packaging material P1 is uniformly stretched from all four directions at a predetermined position, and is neatly set and held without introducing wrinkles or the like.

When the packaging material P1 is expanded and set as described above, the push-up and supply mechanism 6 is operated upwardly in the supply unit side as the drive unit operates.

As a result, as soon as the upper surface of the fruit or vegetable W2 contacts the packaging material P1 in the above-mentioned fixed position, the product W on the pedestal 10 is lifted while stretching the packaging material appropriately, and the relaxation feeding mechanism 120 is relaxed. As soon as the mechanism 120 is appropriately pressed against the belts 130, 130, the entire mechanism 120 is moved upward in parallel via the four-bar parallel link mechanism, and is lifted to the rising end position and put on standby.

In this process of pushing up the product, the clamping means of each part on the drawer packaging section side is operated by the pneumatic force of the cylinder 67, 88, 94, which is the operating means, and by the sheet or mat of each clamping part. Using the elastic holding force, the packaging material P1 continues to be appropriately clamped and held so that it will not be forcibly pulled or torn due to the size, shape, pushing force, etc. of the item W.

Therefore, at the time when the item W was pushed up, the packaging material P1 was partially held between the relaxation belt 130 and the item W, and the packaging material P1 as a whole took on a substantially mountain-like shape along the shape of the item W. It remains well preserved.

When the article W is pushed up to the wrapping position as described above, the entire folding device 109 is operated in the folding packaging section by the forward movement of the reciprocating mechanism 103 accompanying the operation of the drive section.

During this operation, as can be seen from FIG. 13 and FIG.
0b, the front edge of the packaging material P1 (the part between the clamp drawer 62 and the item W) is held while being folded into a horizontal square shape between the pedestal 10 and the plate W1 of the item W.

In addition, in connection with the forward folding operation of the front folding tool 110, in the opening/closing folding tool 113, the folding plates 115, 115 on both sides, which are still in the V-shaped expanded state, are synchronously and narrowly closed inwardly to each other. While each side edge of the packaging material P1 (the part between the spreading mechanisms 82, 82 on each side and the item W) is retained at the edge, the packaging material P1 is placed in a horizontal ■ shape between the pedestal 10 and the plate W1 of the item W. Infiltrate while folding.

Along with this horizontal folding, the narrowing pieces 115a of both folding plates 115 engage both ends of the rear edge held in tension by the clamp holding device 90, and narrow inward to tighten the same rear edge. Fold and hold to the required width.

In the three-way folding operation of the folding device 109, both folding tools 1
In the synchronous operation of 10 and 113, the opening/closing folding tool 113
Although the horizontal folding starts a little early in terms of timing, it ends synchronously with the front folding tool 110,
Upon completion of this operation, the packaging material P1 is removed as shown in Figure 20A.
three peripheral edges, that is, both side edges eH, J, and then the front edge e
2 are sequentially folded into the lower surface of the article W, and the article W is scooped up from the pedestal 10 by the front folding tool 110.

Note that during the three-way folding operation described above, the packaging material P1 is expanded by the timely operation of the clamp drawer 62 and the cylinders 67, 88 of the both expansion mechanisms 82 to expand the clamping means.
has its three edges released, and only the aforementioned rear edge e3 is held by the presser 90.

During the above-mentioned three-way folding operation, the push-up supply mechanism 6 first receives the article W, with the stationary receiving piece 10B on the pedestal 10 mainly being held by all the movable receiving pieces 10C and 10D, as shown in FIG. As the left and right folding plates 115 move forward (close), the receiving pieces 10D on both sides are tilted sequentially from the outer row, and as the front folding tool 110 moves forward, the receiving pieces 10D on the front side are tilted.
00 tilts in order from the front row to fold the item W into the front folding tool 110
All movable receiving pieces 10C, 1
The product is held stably until the 0D is tilted in the order of pushing as the packaging material is folded.

Then, after the three-way folding operation is completed, while the conveyance section side is operated, the above-mentioned supply mechanism 6 is lowered to the original position, and the above-mentioned clamp presser 90 is moved to the operating cylinder 94.
With the operation of , it is rotated downward to its original position to release the rear edge of the packaging material P1 folded and held as described above.

On the conveyance section side, the rotation support shaft 57 is appropriately rotated in accordance with the operation from the crank mechanism section side, whereby each mechanism 120,
137, 143, and 148 are operated in synchronization through the respective transmission systems, and sequentially transport the aforementioned items W.

That is, the article W is first fed forward (to the right in FIG. 14.15) while being flexibly suppressed and held as appropriate by the rotation of the relaxation belt 130 in the relief delivery mechanism 120, and then transferred onto the delivery mechanism 137. It will be done.

Then, while being sent out on the mechanism 127, the above-mentioned packaging material P
1, while being guided by the belt 141, the plate W1
Folded into the bottom surface 〇 As a result, the rear side part e3 is properly folded in without protruding or leaving anything unwrapped (exposed) as shown in the opening in Figure 20, and the item W is neatly wrapped on all sides, that is, completely wrapped. .

The packaged items are then transferred to the delivery guide mechanism 143.
Each edge of the packaging material P, which is folded into the lower surface of the item W, is heated by the heater while being appropriately pressed and guided by the packaging material P, which is then passed onto the delivery guide mechanism 148 and sent out on the flat belt 154 of the same mechanism 148. At step 155, they are heated and bonded.

At this point, one of the packaging and unloading operations in this example is completed, the mechanisms of each part described above return to their original states, and from then on, the items supplied to the wrapping section are wrapped and unloaded based on the sequence of operation of each process described above. Ru.

As described above, the present invention provides a packaging machine that wraps an article supplied and held in a wrapping section above a stretching set section of the packaging material with a wrapping material, and wraps the article while sequentially folding the edges of the wrapping material. The device includes a pre-folding tool, which folds the front edge of the packaging material into the bottom surface of the item while being moved by a reciprocating mechanism, on both sides of the wrapping section, and a pre-folding tool disposed on both sides of the pre-folding tool. Equipped with a horizontal folding tool that folds the side edges of the packaging material into the bottom surface of the item in the process of moving a pair of folding plates to the front folding tool with appropriate timing using a reciprocating mechanism, and At the end of the folding plate, a tightening piece is attached to the edge of the pond in the process of folding the side edge of the packaging material, and tightens the edge inward to regulate and hold the edge at a predetermined width. Because of this, when folding one edge of the packaging material and subsequently folding the edge of the ikegata, the edge can be folded in properly without protruding from the bottom of the item or leaving the bottom unwrapped. This allows the product to be neatly wrapped over its entire surface using the minimum necessary packaging material that corresponds to the size of the product.

Particularly, in the device of the present invention, the position of the above-mentioned narrowing pieces can be adjusted in the inner and outer directions of the folding plate concerned, and the mutual spacing between them can be changed. It can be folded properly for various sizes of items, and can be used to package goods of various sizes to improve its applicability.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Fig. 1 is a schematic side view showing the entire internal mechanism of the packaging machine, Fig. 2 is a schematic plan view with some parts omitted, and Fig. 3 is a schematic side view showing the entire internal mechanism of the packaging machine. FIG. 4 is a side view showing the packaging material supply section side; FIG. 5 is a partially cutaway plan view of the feeding mechanism of the feeding device; FIG. 6 is the feeding exchange device. FIG. 7 is a cross-sectional view taken along line A-A in FIG. 6, and FIG. 8 is a side view showing the drawer extension side and the folding side of the packaging material. 9 is a plan view showing the clamp drawer part side with some parts cut away, and FIG. 10 is a sectional view taken along line BB in FIG. 9.
Fig. 11 is a front view showing the expansion mechanism on both sides, Fig. 12 is a front view with parts of the clamp presser and cutter device partially cut away, and Fig. 13 is a plan view showing the folding packaging section for the product. , Fig. 14 is a side view of the article delivery section, Fig. 15 is a partially cutaway plan view, and Fig. 16 is a section C- in Fig. 15.
A sectional view based on line C, and Figure 11 A, 口, HA, 2, HO, HE, HO, and CH show a series of steps for supplying, packaging, and conveying goods, respectively, in relation to each other from the side direction and the front direction. Fig. 18A is a plan view showing the folding operation of the folding device step by step, Fig. 19 is a front view, and Fig. 20A is an opening showing the process of folding the packaging material into the product. It is an explanatory view shown from the bottom. 5... Feeding base, 6... Pushing up supply mechanism, 10... Receiving stand, 12... Feeding device,
13...First feeding mechanism, 14...Second
Feeding mechanism, 34... Feeding exchange device, 47...
...First feeding guide, 48... Second feeding guide, 53... Feeding guide plate, 54... Feeding guide plate, 55. ...Reciprocating mechanism, 62...
...Clamp drawer, 82...Extension mechanism, 9
0...Clamp holder, 98...Cutter device, 103...Reciprocating mechanism, 109...
...Folder, 110...Front folding tool, 1
13... Opening/closing folding tool, 115... Folding plate, 115a... Narrowing piece, 120...
... Relaxation supply mechanism, 130 ... Relaxation belt,
137... Delivery mechanism, 143... Delivery guide mechanism, 148... Delivery guide mechanism, 155.
... Heater, p1, p2 ... Packaging material, P
i, P2... Packaging material body, W... Goods.

Claims (1)

[Claims] 1 With the packaging material being stretched while pushing up the product as the machine wraps, the product is fed to the wrapping area above the set position of the packaging material, and then, while folding the packaging material, In a packaging machine configured to transport the item out of the wrapping section after viewing the item, the wrapping section includes:
A front folding tool that folds the front edge of the wrapping material into the bottom surface of the article while being moved by an appropriate reciprocating mechanism, and a pair of folding plates arranged on both sides of this front folding tool are folded by an appropriate reciprocating mechanism. a horizontal folding tool that folds the side edge of the packaging material into the bottom of the item in the process of moving it to the front folding tool at appropriate timing;
In the process of folding the side edges of the packaging material, the edge of the pond is hooked to the ends of both folding plates of the horizontal folding tool, and the edges are folded inward to form a predetermined width. In a packaging machine, the wrapping piece is equipped with a narrowing piece for regulating the folding plate, and the narrowing piece is set so that the position of the narrowing piece can be adjusted in both the inside and outside directions of the folding plate, so that the distance between the facing pieces can be changed. Folding packaging equipment.