JP2933019B2 - Stretch wrapping machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stretch wrapping machine, and more particularly, to an improvement in a stretch wrapping machine for carrying out wrapped goods in a direction perpendicular to a direction in which a wrapping section is carried out.

[0002]

2. Description of the Related Art It is possible to wrap a large amount of goods in a short time by covering the goods with a film, folding the end of the film into the bottom of the goods, and gradually sealing the bottom of the goods gradually transferred from the packaging part. As a compact and high-performance stretch wrapping machine, there is one disclosed in Japanese Patent Publication No. Hei 6-102454. In this stretch wrapping machine, a carry-out section through which wrapped goods are pushed out by a pusher of the wrapping section is provided above a carry-in section where the goods before wrapping are placed, and the carried-out goods are provided by an operator. Out of the way, and
In order to make it easy for one worker to carry out the packaged product, the product is immediately transferred in a direction perpendicular to the direction in which the packaged product is taken out from the packaging unit, and the product is collected in the product storage unit.

[0003] This is described in detail with reference to Fig. 13. The left and right folding plates 301 and 302 and a rear folding roller are provided.
First, a left and right folding plate is provided by a packaging unit 300 having a 303, a pusher 305, and a front folding roller 304.
At 301 and 302, fold the left and right edges of the film into the bottom of the product,
Subsequently, the rear end of the film is folded by the rear folding roller 303 to the bottom of the product, and the product is pushed out by the pusher 305. The front end of the film is folded by the front folding roller 304 to the bottom of the product, and is conveyed to the roller conveyor 410. The goods transported to the roller conveyor 410 are the rollers 416 of the roller conveyor 410 and the heater rollers 4 provided downstream of the roller conveyor 410.
The film end folded into the bottom of the product is welded (heat-sealed) by the heater roller 425 as a heat medium during the conveyance. Then, it is carried out to a carry-out conveyor 450 (pusher belt conveyor 454) provided on the downstream side of the heater roller 425 in a direction orthogonal to the transfer direction of the heater roller 425. At this time, the product moves until the tip abuts against the stopper 455 erected in front of the unloading conveyor 450, and always unloads the product based on the tip of the product regardless of the size of the product.
Is designed to fit the largest product. Further, the products carried out to the carry-out conveyor 450 on the basis of the leading end are taken out of the carry-out roller conveyor 470, which is a product storage section provided in the downstream side of the carry-out conveyor 450 in a direction parallel to the roller conveyor 410.
It is pushed out by the pusher 453 of the hepusher belt conveyor 454, and is carried out to the carry-out roller conveyor 470.

[0004]

However, as described above, this conventional configuration is such that a heater roller is provided between the roller 416 of the roller conveyor 410 and the unloading conveyor 450.
An arrangement configuration in which 425 are arranged is adopted. For this reason,
Ensure that the product before heat sealing is pushed out and carried out to the unloading section, that the film edge at the bottom of the product is securely heat-sealed, and that the width of the product is sufficiently secured in the direction perpendicular to the unloading section There was a minimum required length for each part in order to ensure reliable transfer, etc., and there were limitations on improvement. In particular, as described above, even if the largest wrappable product is conveyed to the carry-out conveyor 450 based on the leading end of the product, the rear end of the product does not fall on the heater roller 425 (which is an obstacle to conveyance). Because the width of conveyor 450 was determined,
The width cannot be reduced. In this case, when the unloading conveyor 450 is removed and the heater roller 425 is provided instead of the unloading conveyor 450, when the heater roller 425 is transferred to the heated heater roller 425,
Although it was necessary to slide in the direction perpendicular to the rotation direction of 25, welding started from the first transferred portion, and the welding increased the coefficient of friction of the film, making it impossible to slip and making transfer impossible. It is possible to solve this problem by using only the unheated roller 416 for the transfer portion, but it is not possible to achieve downsizing due to the additional length.

Accordingly, an object of the present invention is to provide a high-performance stretch wrapping machine which aims at further miniaturization and shortening the cycle time by shortening the distance from the carry-out section to the means for transporting in the orthogonal direction. It is what it was.

[0006]

The technical means taken to achieve the above object is to cover a product with a film, fold the film end into the bottom of the product, and carry out the product to the carry-out portion; A sealing means for heat-sealing the end of the film, wherein the heat-sealed goods are conveyed from the sealing means. In the stretch packaging machine, the sealing means is disposed at the unloading section and is orthogonal to the unloading direction of the packaging section. Mounting member moving means for moving the mounting member to a position above the heater conveyor and at another position, the mounting member comprising a heater conveyer for conveying the product to the unloading unit, and a mounting member on which the product is unloaded and mounted on the unloading unit. And a stopper for contacting the product when the placing member on which the product is placed is separated from above the heater conveyor to prevent the product from moving, and for placing the product on the upper surface of the heater conveyor. Characterized in that was. Here, the unloading section refers not only to the place where the product is directly unloaded from the packaging section but also to the periphery thereof, and is disposed in the unloading section and transports the product in a direction orthogonal to the unloading direction of the packaging section. The heater conveyor to be conveyed also includes a heater conveyor disposed adjacent to or near the packaging unit. In addition, moving the placing member to a position above the heater conveyor and another position means moving between a carry-out position where the product is carried out and above the heater conveyor, or placing the product on the placing member above the heater conveyor. In this case, it means moving from above the heater conveyor to an arbitrary position around the heater conveyor. (Claim 1) The placement member moving means separates the placement member from above the heater conveyor, and the stopper comprises:
The product is brought into contact with the rear end of the product transferred above the heater conveyor (claim 2). Further, the mounting member is provided with a slit in a direction parallel to the moving direction of the mounting member, and the stopper is capable of protruding and retracting through the slit (claim 3). Further, the heater conveyor is controlled so that the transport direction of the heater conveyor can be changed (claim 4).

[0007]

According to the above technical means, the following effects are obtained.
According to the first aspect, the product before heat sealing is transferred to the mounting member by being unloaded from the packaging unit to the unloading unit, and is transported in a direction orthogonal to the unloading direction of the packaging unit disposed at the unloading unit. When the placing member is separated from the heater conveyor to be moved, or when the placing member is moved above the heater conveyor and then separated, the stopper is brought into contact with the product so that the product does not move along with the placing member. The product is placed on the upper surface of the conveyor. Therefore, it is not necessary to slide the product wrapped with the film on the hot heater conveyor, and the product can be smoothly placed on the heater conveyor. In this way, the product placed on the upper surface of the heater conveyer which functions as both a heat seal and a carry-out conveyor is transported in a direction orthogonal to the carry-out direction of the packaging unit while the film end at the bottom is heat-sealed. According to claim 2, the goods above the heater conveyor,
Alternatively, the stopper is brought into contact with the rear end of the product moved above the heater conveyor, and the mounting member is separated from above the heater conveyor, so that the rear end of the product becomes a reference position for mounting on the upper surface of the heater conveyor. According to the third aspect, the free space above the mounting plate is ensured such that the stopper protrudes and retracts through the slit provided in the mounting member. According to the fourth aspect, the transfer direction of the heater conveyer is controlled so as to be changeable, and the transfer direction of the product is made two directions.

[0008]

Next, embodiments of the present invention will be described with reference to the drawings. The drawing shows a weighing label printer that weighs goods and issues labels, a stretch wrapping machine that wraps goods, and a label sticking device that holds the issued labels and sticks the wrapped goods. It illustrates a weighing / packaging / labeling machine that automatically performs a series of operations from packaging to labeling. In the drawing, reference numeral A denotes a stretch packaging machine, reference numeral B denotes a weighing label printer, reference numeral C denotes a label sticking device, reference numeral 1 denotes a packaging machine main body, reference numeral 2 denotes sealing means, reference numeral 3 denotes mounting member moving means, and reference numeral 4 denotes a stopper. It is.

The stretch wrapping machine A has a mechanism (pre-stretching mechanism) for expanding the width direction of the film, and covers the conveyed product with the film and pushes the product to a discharge position Q which is a part of the discharge part P. Means according to the present invention for unloading the wrapped product in a direction orthogonal to the unloading direction of the wrapping unit, that is, the film end provided at the unloading unit P adjacent to the unloading position Q and folded at the bottom of the product is heated. Unloading direction of the packing section while sealing (pusher extrusion direction)
And a placing member moving means 3 for delivering the goods G pushed out to the carry-out position Q by the pusher 14 to the sealing means 2, and a predetermined position on the upper surface of the heater conveyor in contact with the goods. And a stopper 4 for positioning the product.

As shown in FIGS. 1 to 3, the packaging machine main body 1 is provided on the front of the machine frame a1, that is, in the front part, and has an uneven mounting surface on which a product (package) G is mounted. The loading portion (weighing pan) 10 and the endless belt 11a on which the pusher 11b is erected move in the recess of the loading surface of the loading portion 10 and the front side of the loading portion 10 and the inside of the machine frame a1. A conveyor 11 which is hung over the rear part and uses a stepping motor as a driving source,
A packaging unit 12 provided above the conveying end of the conveyor 11 and provided with left and right folding plates 12a, a rear folding plate 12b, and a front folding roller 12c for packaging products, and a packaging unit provided inside the machine frame a1 with the conveyor 11 An elevator 13 that pushes up the product G transported below the tray 12 to the packaging section 12;
b Pusher provided above and for pushing the product out to the discharge section P
14, a film holding means 16 for holding the leading end of the film F unwound from the film roll 15, and a juxtaposition in which the leading end of the film F held by the film holding means 16 is nipped and pulled out and transported to the packaging section 12. A film transport mechanism 17 comprising upper and lower transport belts, and film holding means 16
And a cutter 18 for cutting the film F drawn out by the transport mechanism 17 and a package timing, a label affixing position, and a product provided in the vicinity of the product mounting part for determining the timing. It is provided with a width sensor 19a and an optical sensor 19b provided in the middle of the product transport path for measuring the height and height.

In the packaging machine main body 1 configured as described above, when the commodity G is first placed on the commodity placing section 10, the weighing and the width are measured immediately, and the weighing data is sent to the weighing label printer control section D and the width data is sent to the weighing label printer control section D. Is transferred to the stretch packaging mechanism control unit E and the weighing label printer control unit D. When the measurement is completed, the conveyor 11 is driven and the placed product G is conveyed.
While being pushed and moved by the pusher 11b of 11 and being measured in vertical length and height, it is transported to a predetermined position located below the packaging section 12 and above the elevator 13. The specific configuration for measuring the width, height, and height is described in Japanese Patent Application No.
With the means proposed in US Pat. No. 7,167,731, the distance from the transport path center line to the left end of the product or the distance from the transport path center line to the right end of the product is determined, and the sum is taken to determine the width (in the direction orthogonal to the transport direction). The vertical width of the product is determined by the number of steps in which the product interrupts the optical axis by a plurality of optical sensors 19b provided on the upstream side of the conveyor 11 so that the optical axis irradiates the optical axis in a direction orthogonal to the transport direction. , The height of the product can be measured based on the step position where the product has blocked the optical axis of the optical sensor 19b.

On the other hand, the front end of the film is held by the film holding means 16 and the front end of the film is moved to the conveyance start end of the film conveyance mechanism 17 so that the vicinity of both ends of the film is sandwiched between a pair of upper and lower conveyance belts. At the same time, the film transport mechanism 17 is driven to transport the film F. When the length of the film F reaches a predetermined length corresponding to the size of the product, the cutter 18 provided at the tip of the holding means cuts the film F. The film F cut to the predetermined length
Is transferred to the packaging unit 12 and spread.

[0013] Then, the elevator 13 at the end of the product transport path starts to rise, and the product G transported to a predetermined position is transferred to the upper surface of the elevator and further raised, whereby the product G is
The left and right fold plates 12a and the rear fold plate 12b are moved back and forth through the left and right and rear end portions of the film F stretched up and stretched with respect to the film F stretched on the wrapping portion 12, and moved to the bottom of the product G. After folding the film F by the front folding roller 12c, the film F is folded by the front folding roller 12c while the product G is horizontally pushed toward the unloading section P on the front side of the machine frame a1 by the pusher 14. The wrapping is performed, and the product is carried out to the carry-out position Q.

Next, a means according to the present invention for carrying out a packaged product in a direction perpendicular to the carrying-out direction of the packaging section will be described.
The unit according to the present invention includes a sealing unit 2, a mounting member moving unit 3, and a stopper 4. First, the sealing means 2 will be described.
As shown in FIG. 7, it comprises a heater conveyor 21 and a delivery roller 22. The heater conveyor 21 is at the unloading position Q
3. An endless belt 21c composed of a flat belt stretched between rollers supported rotatably on the machine frame a1 in a direction orthogonal to the unloading direction of the packaging unit 12 adjacent to the packaging unit 12, and provided on the left front side in FIG. The rotation of the drive motor 21d is transmitted to an endless belt 21c by a timing belt 21e which is stretched between a pulley and a motor pulley coaxial with the left roller and a drive motor 21d in the motor box a2. As shown in FIG. 7, the conveyor body 21a is provided with a heat transfer plate 21f at an upper portion, and a tie rod fixed to the four corners of the heat transfer plate 21f and a bracket 21g formed of a metal bracket bent in a U-shape. So as to stand from the frame a1, and
A heater body 21 that is always heated and provided inside the conveyor so that the heat transfer plate 21f contacts the inside of the upper end of the endless belt
b, the heat of the heater body 21b is transferred to the bottom of the product via the endless belt 21c while the product G placed on the upper surface of the endless belt is conveyed in the direction orthogonal to the unloading direction of the packaging unit 12, and the film edge The part is heat-sealed. The heater conveyor 21 is not limited to the flat belt type, but may be any type of transport such as a roller conveyor type.

The delivery roller 22 is provided between the carry-out roller conveyor 5 and the heater conveyor 21 which is a product storage section, and is wound around a pulley coaxial with a roller on the right side of the heater conveyor 21 and a pulley of the delivery roller. Heater conveyor 2 by the timing belt 22a
It is designed to synchronize with 1. In the unloading roller conveyor 5, serrated slits (not shown) are formed in the longitudinal direction of each rotatable roller so that the product can be easily transferred by making line contact with the bottom of the product. In FIG. 3, the product G is inclined so as to be gradually lowered toward the front side, and a stopper (not shown) is provided upright at the front end portion so that the heat-sealed product G gradually accumulates.

The placing member moving means 3 is composed of a moving mechanism 31 and a placing plate (placing member) 32 as shown in FIGS. The moving mechanism 31 is provided with a drive motor 31a provided in the motor box a2 on the left front side in FIGS. 4 and 5, and a lower part provided below the heater conveyor 21 such that the longitudinal direction is orthogonal to the unloading direction of the packaging unit 12. Shafts 31b, 31b 'rotatably supported by machine frame a1 at a predetermined interval
The endless belts 31c and 31c ', which are stretched between both ends of the shaft via pulleys, the rotating shaft 31a' of the drive motor 31a, and the left end of the shaft 31b on the near side in FIG. The endless belt 31d, the guide shafts 31e, 31e 'extending in the same direction (parallel) as the unloading direction of the packaging unit 12 near the outside of the endless belts 31c, 31c', and the guide shafts 31e, 31e. 'A bearing 31f, 31f' which can be engaged with and slidable in plan view, a bearing 31f, 31f ', a bracket 31g.31g' connecting the inner surface of the endless belt 31c, 31c 'and an upper surface, and a bearing 31f, 31f. 'The heater conveyor 21 is erected from the outside
L-shaped stay that projects upward and outward from the end in the transport direction
31h, 31h '. By rotating the drive motor 31a, the endless belts 31c, 31c ', which are stretched across both ends of the shaft via a pulley via the endless belt 31d, rotate by moving the drive motor 31a, and the brackets 31g, 31g' are rotated. The bearings 31f, 31f 'move while being guided by the guide shafts 31e, 31e' through the shafts 31e, and the stays 31 erected on the guide shafts 31e, 31e '.
h, 31h 'move between the discharge section P and the upper portion of the heater conveyor (in the left-right direction in FIG. 6).

The mounting plate 32 is, as shown in FIGS. 4 and 5,
Pusher 14 from packaging part 12 to unloading part P in a substantially rectangular shape in plan view
The slits 32a are provided in the same direction as the pushing direction (moving direction of the mounting plate) and at predetermined intervals, and are fixed to the upper surfaces of the stays 31h, 31h 'to be fixed to the stays 31h, 31h'.
Along with the movement of the unloading section P and the upper part of the heater conveyor (in the horizontal direction in FIG. 6). In the present embodiment, the standby position of the mounting plate 32 is set as the unloading position Q adjacent to the packaging unit 12.

The stopper 4 comprises a stopper driving mechanism 41 and a stopper body 42. The stopper drive mechanism 41 is shown in FIG.
And a drive motor 41a provided below the motor box a2 on the left front side in FIG.
A shaft 41b provided below and rotatably supported by the machine frame a1 so that the longitudinal direction is orthogonal to the unloading direction of the packaging unit 12.
And an endless belt 41c, which extends around a rotating shaft 41a 'of the drive motor 41a and a shaft 41b via each pulley, and a mounting plate 32.
And a shaft 41 rotatably supported by the machine casing a1 so that its longitudinal direction is orthogonal to the unloading direction of the packaging unit 12.
d and the shaft 41b and the shaft 41d as shown in FIG.
Endless belt 41 which is wound over each pulley and the guide pulleys 41e and 41e 'and communicates in an orthogonal direction (L-shape).
By rotating the drive motor 41a, the drive motor 41a is transmitted to a shaft 41d provided below the mounting plate 32 to rotate. The stopper body 42 has a flat plate shape, and is fixed to the shaft 41d so as to be located in each slit 32a provided on the mounting plate 32, and can be protruded and retracted through each slit 32a with the rotation of the shaft 41d. It has become.

A series of operations of the sealing means 2, the placing member moving means 3, and the stopper 4 configured as described above will be described with reference to FIG. The product G having the film end folded at the bottom is pushed by the pusher 14 of the packaging machine body 1 and is transferred to the mounting plate 32 waiting at the unloading position Q on the front side of the machine frame a1. As a result, the mounting plate 32 starts to move above the heater conveyor 21 (see FIG. 8A). Immediately before or immediately after the movement of the mounting plate 32, the stopper driving mechanism 41 rotates the stopper body 42 to rotate the mounting plate 32.
Appears (rises) following the rear part of (Fig. 8 (2)
reference). At the same time when the stopper body 42 rises, the mounting plate 32 starts to separate toward the carry-out position Q, which is the standby position, and comes into contact with the rear end of the product with the stopper body 42 standing up to just before the deep portion of each slit 32a. Then, the product is placed on the upper surface of the heater conveyor 21 while preventing the product from moving, and the stopper body 42 is retracted (see FIG. 8C). When the product G is placed on the upper surface of the heater conveyor 21, the heater conveyor 21 is driven, and is conveyed to the discharge roller conveyor 5 while the bottom is heat-sealed in a direction orthogonal to the direction in which the product G is pushed by the pusher 14. (FIG. 8
(4)).

The weighing label printer B is disposed at the upper side of the stretch wrapping machine A as shown in FIG. 2, and the merchandise G is placed on the weighing pan of the merchandise mounting portion 10 of the stretch wrapping machine A. Based on the weighed data, the price of the product G is calculated from the unit price set in advance, and the price and other product data are printed on label paper and issued with the printing surface up. The weighing label printer B is provided with a label issuing port b1 for holding a printed label substantially horizontally. The label sticking apparatus C moves the holding unit c1 to suck and hold the label printed and issued to the label issuing port b1, and moves the holding unit c1 in the horizontal direction (left and right direction in FIG. 2) and the vertical direction (vertical direction in FIG. 2). When the product G is pushed out onto the mounting plate 32 (the unloading section P) by the pusher 14, the holding means c1 holding the label by suction is lowered by the moving means c2, and the film on the upper surface of the product is provided. A label is attached to the top and it is immediately separated.

FIG. 9 shows the electrical configuration of the above-described apparatus, in which a weighing label printer control unit D and a stretch packaging machine control unit E are electrically linked. The weighing label printer control unit D mainly includes the weighing label printer B
It controls the relationship and is controlled by the CPU d1. The stretch wrapping mechanism control unit E mainly includes a wrapping machine A
And is controlled by the CPU e1.

First, the weighing label printer controller D will be described. The CPU d1 is connected to the ROM d via the bus d2.
3, RAM d4, display operation unit d5, measurement unit d6, communication interface circuit (INF) d7, printing unit d8,
The moving means driving unit d9 and the commodity detection sensor d10 are connected, and various control programs executed by the CPU d1 are stored in the ROM d3. RAMd4 is CPUd
1 is provided with areas such as registers and flags used when the control program of the ROM d3 is executed, and a preset data area in which various data are stored in advance for each product. In the preset data area, data for price calculation and label printing is stored in advance corresponding to the product G.

The display operation unit d5 includes an operation unit composed of a keyboard and a touch panel, and a display unit composed of a liquid crystal display of a dot type, and inputs various data and commands or inputs data based on commands from the CPU d1. , Preset data, and various messages, and is also called a console unit. Measuring unit d6
Supplies a weighing signal of the commodity G placed on the commodity placing section 10 (weighing dish) to the CPU d1. The communication interface circuit (INF) d7 is a circuit for communicating various data and commands with the stretch wrapping machine control unit E. The printing unit d8 is a weighing label printer B, which is equipped with a thermal printer.
In addition, the product name, price, unit price, effective date, bar code and the like are printed, and the printed label R is issued to the issuing port b1.

The moving means driving section d9 moves the holding means 1 to suck the label at the issuing port b1,
The label is moved to a predetermined label attaching position, and the direction of the label suction portion is set to a predetermined direction.
This is a mechanism for attaching a label to a predetermined position of the product G in a predetermined direction by lowering the product 1 at a predetermined timing. The commodity detection sensor d10 generates a timing signal for attaching a label, and when the commodity G is located in front of the label attaching place, supplies the fact to the CPU d1.

Next, the stretch packaging mechanism control section E will be described. A communication interface circuit (INF) e3, ROMe4, RA
Me5, an operation unit e6, and a mechanism driving unit e7 are connected. The communication interface circuit (INF) e3 is
This is a circuit for exchanging various data such as height data H of label attaching portion with the weighing label printer controller D and commands. The ROMe4 stores a control program executed by the CPU e1. In RAMe5, CPUe1 is RO
Various tables and the like for determining control data based on shape data (vertical, horizontal, and product heights) of the product G are stored in addition to areas of various registers and flags used when executing the control program of Me4. I have. Operation unit e6
Is a switch for starting and stopping the apparatus. The mechanism drive IF unit e7 is a circuit for driving each mechanism unit of the stretch wrapping machine A when packaging is performed, and specifically, a motor for driving the elevator 13 and a carry-in motor for the conveyor 11 for carrying goods G. And a motor for driving the pusher 14, a motor 21d for driving the heater conveyor 21 according to the present invention, a motor 31a for driving the mounting member moving means 3, a motor 41a for driving the stopper 4, and the like. is there.

As described above, in the present embodiment, an example in which the carry-out section is provided above the product placing section (carry-in section) is described, but any of the left-right carry-out type and the rear carry-out type may be used. In addition, the standby position of the mounting plate is set to the unloading position, the direction away from above the heater conveyor is also separated toward the unloading position, which is the standby position, and the stopper is provided with a slit in the mounting plate so that it can be retracted from the slit. However, the present invention is not particularly limited to this, and the stand-by position and the retreat position of the mounting plate and the stopper may be any positions as long as they do not interfere with other components in the front-rear, left-right, or up-down directions. In this way, the arrangement position of the heater conveyor 21 may be set as the unloading position Q, the upper part thereof may be set as the standby position of the mounting plate 32, and the separation may be performed on the left side from the upper part of the heater conveyor (retreat position). In this case, it is not necessary to move (retreat) the stopper 4 (42). In this case, the pusher 14 of the packaging section 12
Accordingly, the product G becomes a rear end reference. Also, as shown in FIG. 11, the disposition position of the heater conveyor 21 is set as the unloading position Q, the upper portion thereof is set as the standby position of the mounting plate 32, and the heater conveyor 21 is separated (retracted position) from above the heater conveyor to above the packaging portion. In this case, the stopper 4 (42) is provided so as to move up and down to a position slightly higher than the mounting plate 32 adjacent to the end of the heater conveyor 21 on the side of the packaging portion. 42) is moved to the vicinity of the upper surface of the heater conveyor (the stopper is lowered), and the product is placed on the upper surface of the heater conveyor in the same manner as in the present embodiment so that the product G is pushed from the packaging unit 12 by the stopper. 4 (42) is moved upward to a position where it does not hit the product. In this case, the stopper 4
According to (42), the product G becomes the rear end reference.

Further, instead of a carry-out roller conveyor in which heat-sealed products gradually accumulate, a conveyor connected to a subsequent desired production line may be used. As shown in FIG. 21 is easy to rotate forward and reverse, and can be disposed in the product storage section 5 or the connection conveyor at both ends of the heater conveyor. In this case, if the rotation direction of the heater conveyor is controlled by the CPU, when it is detected that one of the product pools is full, the product may be sorted into the other product pool or by product type. Further, the stopper body 42 may have a substantially U-shaped cross section as shown in FIG. 12, and in this embodiment, in particular, the shape of the product (tray shape) is wider at the top than at the bottom. Since the end of the bottom is located closer to the heater conveyor 21 than the position where the stopper body 42 abuts the product because of the example, there is no possibility that a problem occurs, but the bottom and the top are the same, that is, a rectangular shape in a side view. In the tray, the rear end in the moving direction of the mounting plate 32 must be at least at the position of the stopper body 42 in order to completely mount the tray on the heater conveyor 21. However, in this case, if the deep portion of the slit 32a does not exceed the mounting plate 32, the stopper 4 and the mounting plate 32 will interfere with each other. It is effective to prevent this interference. In the present embodiment, when the stopper body 42 comes into contact with the product, a state in which the stopper body 42 stands upright is illustrated. In the used product, the mounting plate is inclined when the mounting plate moves (separates) when the mounting plate is mounted on the heater conveyor. However, such a product can be prevented by making the rotation angle of the stopper body 42 larger than 90 degrees. Further, the mounting plate is not limited to a plate-shaped one, and may be any as long as it can place a product.

[0028]

According to the present invention, a heater conveyer serving both as a heat seal and a discharge conveyer is provided adjacent to the discharge section in a direction orthogonal to the discharge direction of the packaging section, and can be mounted without slipping. Products that have been film-wrapped can be smoothly placed on the heater conveyor that conveys the products in the direction perpendicular to the direction in which the products are unloaded from the packaging unit. In such a case, it is not necessary to separately provide the seal portion and the transport conveyor, and the installation space for this can be omitted. Further, in a type in which the carry-in portion is provided below the carry-out portion, the protrusion of the carry-out portion can be reduced, and the work of carrying in the product is not hindered, and the workability is improved. According to the second aspect, since the placement on the heater conveyor is performed based on the rear end of the product (with respect to the placement direction), there is no problem even if the leading end of the product slightly protrudes beyond the width of the heater conveyor. There is no need to match the conveyor or the entire carry-out section to the product having the maximum depth dimension, and the size can be reduced. Further, since the products are placed on the heater conveyor on the basis of the rear end, the amount of movement for placing is minimized regardless of the size of the products. According to the third aspect, the stopper cannot be retracted until the placement member moves from above the heater conveyor and the product is placed, but even if the placement returns to the initial position, the slit of the stopper placement member is removed. Since the stopper can be retracted under the mounting member, there is no need to separately provide a retracted position of the stopper and a passage therethrough in a planar space. Claim 4
According to this, since the transfer direction of the heater conveyor is controlled so as to be changeable, and the transfer direction of the goods is made possible in two directions, it is possible to sort the products for each product or according to the degree of accumulation of the products, thereby improving the convenience.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view schematically showing a stretch packaging machine according to the present invention.

FIG. 2 is a longitudinal sectional front view of the same.

FIG. 3 is a cross-sectional plan view of the same.

FIG. 4 is a plan view of a main part according to the present invention.

FIG. 5 is a sectional view taken along line (A)-(A) in FIG. 4;

FIG. 6 is an enlarged sectional view of FIG. 4 (B)-(B).

FIG. 7 is an enlarged sectional view of (C)-(C) in FIG. 4;

FIG. 8 is an explanatory view of a series of operations of main parts according to the present invention. (1) A state in which the mounting plate moves above the heater conveyor. (2) A state in which the stopper comes and goes. Shows the state where it is separated from above the heater conveyor. (4) Shows the state where the product is placed on the upper surface of the heater conveyor.

FIG. 9 is an explanatory diagram showing an electrical configuration.

FIG. 10 is a plan view showing another embodiment.

FIG. 11 is a plan view 2 showing another embodiment.

FIG. 12 is a side view showing another embodiment of the stopper body.

FIG. 13 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

A: Stretch wrapping machine 12: Packaging part 14: Pusher 2: Sealing means 21: Heater conveyor P: Unloading part 31: Moving mechanism
32: mounting plate 32a: slit 3: mounting member moving means 4: stopper 42: stopper body G: product F: film

Claims (4)

(57) [Claims] 1. A heat-sealed product, comprising: a packaging unit for covering the product with a film, folding the film end into the bottom of the product, and carrying the product to a carry-out unit, and sealing means for heat-sealing the folded film end. In the stretch wrapping machine conveyed from the sealing means, the sealing means comprises a heater conveyer arranged in the unloading section and transporting the goods in a direction orthogonal to the unloading direction of the packaging section, the goods are unloaded to the unloading section And a placing member for moving the placing member to a position above the heater conveyor and another position, and a placing member on which the product is placed is separated from above the heater conveyor. A stretch wrapping machine, comprising: a stopper for placing the product on the upper surface of the heater conveyor so as to abut the product at the time to prevent the product from moving. 2. The method according to claim 1, wherein the placing member moving means moves the placing member away from above the heater conveyor, and the stopper comes into contact with a rear end of the product transferred above the heater conveyor. The stretch packaging machine according to claim 1. 3. The stretch according to claim 2, wherein the mounting member is provided with a slit in a direction parallel to a moving direction of the mounting member, and the stopper can be protruded and retracted through the slit. Packaging machine. 4. The stretch packaging machine according to claim 1, wherein the heater conveyor is controlled so that the conveying direction of the heater conveyor can be changed.