JP2973284B2 - 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 for wrapping an object to be wrapped, which comprises a product and a tray on which the product is placed, with a film. More specifically, the present invention relates to control of a tray loading position of a stretch packaging machine.

[0002]

TECHNICAL BACKGROUND Stretch wrapping machines are often used to automatically package objects to be packaged, which consist of products and trays on which the products are placed, but various types of products are distributed. At present, trays having different shapes and materials are being distributed as trays on which products are placed for reasons such as product shape, properties, and differentiation from other products. .

[0003]

2. Description of the Related Art Conventionally, this type of stretch wrapping machine has a first fold portion which pushes and folds an edge of a film on a lower surface of a wrapped product comprising a product and a tray on which the product is placed; A wrapping means having a second folding portion which is folded along with the unloading of the package, a loading means for loading the packaged article below the packaging means, and a packaged article loaded below the packaging means above the packaging means. The apparatus includes a lifting means for pushing up, a film transport means for transporting and stretching the film between the packaging means and the loading means, and an unloading means for unloading the packaged articles. The packaging process is described in detail. The packaged object moved to the carry-in position by the carry-in unit is pushed up by the lifting / lowering means onto the stretched and held film, and the upper surface of the packaged object is covered with the film. Plate and the rear folding plate) to push the edge of the film and fold it to the lower surface of the package, leaving only one side in the unloading direction, and then move the package to the upper part of the fixed folding member (unloading). ), The remaining film edge is naturally folded into the bottom surface of the packaged object, and packaging and unloading are completed at the same time.

[0004] Here, the above-mentioned carry-in position is a reference position at which the tray is always carried into a fixed position even if the tray is different. (In the direction in which the folded member is located) to the constituent side of the upper surface of the tray (hereinafter, referred to as “reference distance”), and in particular, the carry-in direction and the carry-out direction are the same direction, that is, the front side. In the type that is carried in from the outside and carried out to the back, the rear end reference (hereinafter simply referred to as “rear end reference”) is used when viewed from the operator, and the carry-in direction and the carry-out direction are relative directions, that is, the carry-in is performed from the near side, The type discharged to the front end standard (hereinafter simply referred to as “front end standard”)
That. ). As a result, the film on the discharge side can be folded without wrinkles and with an appropriate tension.

[0005]

When an object to be packaged is pushed up from a predetermined carry-in position onto a stretched and held film, stress concentrates on the constituent side of the tray upper surface on the reference side of the front end reference or the rear end reference. However, in the past, packaging was done in a setting that takes this into account, but as described above, various shapes,
Due to the distribution of trays of different materials, there are also trays with low strength inside, and if a tray with low strength is used, the constituent sides of the tray upper surface can not withstand the stress and are crushed, In the case of a sharp tray having an acute angle with the side surface, there has been a problem that the film is sheared. Further, in the case of packaging with a large pre-stretch (extending the film) for cost reduction, the above problem is further promoted.

[0006] Further, the carrying means used in the conventional stretch wrapping machine, that is, a conveyer section in which conveyers are juxtaposed coaxially at a predetermined interval and pushers are appropriately erected in the circumferential direction, are provided with pushers. Is detected, the loading start origin is determined, and the loading is performed to a desired position, the upper surface is formed in a tapered shape larger than the lower surface,
In the case of a tray higher than the pusher height, the constituent side of the tray upper surface comes behind the position of this pusher in the advancing direction, so that the carry-in position shifts by a protruding horizontal distance, and especially the front end reference With the stretch wrapping machine, there was a problem that packaging was impossible. Further, conventionally, the carry-in position is set on the elevating means, and the carry-in position is shifted when the article to be packaged is transferred by the carry-in means, so that it is troublesome to attach a braking member to the upper surface of the elevating means to avoid this. Work was done.

SUMMARY OF THE INVENTION The present invention has been made in view of the conventional circumstances, and an object thereof is to provide a stretch wrapping machine capable of securely packing without using a tray having different shapes and materials without causing a defective packing. The purpose is to provide.

[0008]

The technical means taken to achieve the above object is to push an edge of a film onto the lower surface of a packaged article comprising a product and a tray on which the product is placed. a first folding unit for folding, and packaging means comprising a folding write No <br/> second folded portions with the unloading of the packaged articles, and carrying means for carrying the objects to be packaged in a packaging unit downward, the packing means The apparatus includes lifting means for pushing up a packaged object carried downward above the packaging means, film transporting means for transporting and stretching the film below the packaging means, and carrying-out means for carrying out the packaged material. In a stretch packaging machine that pushes up the package moved by the loading device onto the stretched and held film and folds the film edge into the lower surface of the package, the packaging device transports the package loaded by the loading device. Decide the position to stop downward. Storage means for previously storing the position data for each type of tray for, tray and control means for controlling the carrying means on the basis of the positional data to be selected, the articles to be packaged in the desired loading position An object of the present invention is to solve the above-mentioned problem by freely stopping the movement.

[0009] That is, by selecting the tray in the desired process, position data from the storage means the position data is are stored is read out, to drive the carrying means a control signal by a predetermined arithmetic processing by the control means Driving sources such as linear or rotary output actuators, (hydraulic, pneumatic linear cylinders, or rotary motors, or electric motors with brakes, stepping motors, etc. Is preferably used as a direct drive source of a stepping motor.) To control the movement and stop of the packaged object to a desired carry-in position. (Claim 1)

[0010] Further, a contact portion for abuttingly moving the abutting object carried by the carrying means below the packaging means and a moving means for moving the contact portion along the carrying direction of the carrying means. storage means for previously storing a pushing data to determine the pushing movement amount for each type of tray <br/> Lee, tray control for controlling the moving means based on the selected push data Means are provided, and the object is solved by allowing the object to be packaged to be pushed and stopped at a desired carry-in position. This technical means, when selecting the tray in the desired process, push data
The push data is read from the storage means stored in the
By performing a predetermined arithmetic processing and transmitting a control signal to the moving means,
The object to be packaged, which has been moved to the lower part of the packaging means by the carrying-in means, is pushed and moved by the contact portion to move and stop the object to the desired carrying-in position. (Claim 2)

[0011] Further, a contact portion for stopping the article to be conveyed below the packaging means by the carrying means, a moving means for moving the contact portion along the carrying direction of the carrying means, and a type of tray. Storage means for storing the movement amount data of the stopper for each time, and control means for controlling the movement means based on the corresponding movement amount data stored in the storage means when a tray is selected, The above-mentioned problem is solved by making it possible to stop at a desired carry-in position. When a tray is selected in a desired process, the technical means reads the movement amount data from the storage means in which the movement amount data is stored, performs predetermined arithmetic processing, and transmits a control signal to the movement means. Then, the contact portion is moved to a desired position in advance by the moving means, and the incoming packaged object is brought into contact with the packaged portion to perform stop control. (Claim 3)

Furthermore, as a process in which the tray is selected, said storing means, each tray number, the tray data stored position data or pushing data or moving amount data is allocated, and a product data Means in which a tray is selected by previously associating and storing the items and selecting and inputting a product via a keyboard or the like is adopted. (Claim 4)

The loading means comprises a conveyer section in which conveyors are arranged coaxially at predetermined intervals, and the elevating means is vertically movable so as to cover gaps formed between the respective conveyors. An elevating unit having tops divided at intervals is provided, and when descending, the top surface is set lower than the top surface of each conveyor. (Claim 5)

[0014]

According to the above technical means, the following effects are obtained. According to the first, second, or third aspect, by allowing the package to be stopped at a desired carry-in position, the reference distance can be increased, and an appropriate reference distance suitable for the mechanical properties of the tray can be obtained. Set. According to the fourth aspect, a tray is selected by selecting and inputting a product through a keyboard or the like. According to the fifth aspect, the carry-in position of the article to be packaged is determined by the carry-in means.

[0015]

Next, embodiments of the present invention will be described with reference to the drawings. The drawings illustrate a stretch wrapping machine suitable for wrapping objects to be wrapped with a weighing label printer. 1 to 6 show the first embodiment.
FIG. 7 illustrates the second embodiment, wherein reference numeral A denotes a stretch packaging machine, B denotes a packaging machine main body, C denotes a weighing label printer, D denotes control means, E denotes storage means, L denotes a contact portion, Is a moving means, T is a tray, and F is a film.

First, a first embodiment will be described with reference to FIGS. The packaging machine main body B includes a merchandise placing section 1 also serving as a weighing dish, a loading means 2, and a film cutting and holding means 3.
Film transport means 4, elevating means 5, packaging means 6
, A carrying-out means 7, a sealing means 8, and a packaging machine main body controlling means 9, which is a front-end reference device. In brief, the film F is fed from the feeding roll R,
The film F is transferred from the film cutting and holding means 3 to the film transfer means 4 and transferred below the packaging means 6. On the other hand, the articles W to be packaged placed on the
Is carried into the upper surface of the elevating unit 51 of the elevating means 5 described later. Next, the packaging object W is pushed up by the lifting / lowering means 5 toward the film F stretched by the film transport means 4, and the edge of the film F is folded by the packaging means 6. Then, the packaged object W is pushed by the unloading means 7 to be unloaded onto the sealing means 8 to seal the folded surface, and the label issued by the weighing label printer C described later is used for the packaged unpackaged material W. Pasting and packaging on the film F side is completed.

The product placing section 1 (weighing dish) has a flat plate shape at a predetermined interval so that the upper portion does not interfere with a plurality of belt conveyors 23 described later, and an end in a direction opposite to the carrying-in direction projects. The tray can be positioned by contacting the tray. This product placing section 1 is a belt conveyor 2
3 is provided so that the upper surface of the product mounting portion 1 is higher than the upper surface, and when the packaged object W is mounted, the lower weighing portion c6 weighs and the weighing value signal is transmitted to the weighing label printer control portion c1. It is supposed to be. Note that a product width detection sensor and a product height detection sensor (not shown) are provided in order to measure the displacement and width of the article W placed on the product placement unit 1. However, the description is omitted because it is not directly related to the present invention.

The carrying-in means 2 comprises a conveyor section 21,
A carry-in motor 22 composed of a stepping motor, a belt conveyor 23, a pulley 24, a shaft 25, a strip-shaped pusher 26 erected at a predetermined interval in a circumferential direction on a belt upper surface of the belt conveyor 23, The belt conveyor 23 is arranged side by side at a predetermined interval between the shafts 25. The conveyor unit 21 is stretched so that the belt above the belt conveyor 23 can move into the gap of the product placement unit 1. In addition, the surface of the belt is increased in friction to prevent slippage.
The pusher detection sensor 27 is a transmission type optical sensor, and the pusher detection sensor 27
Is set so that it becomes the starting point of the number of steps described later.

The film cutting and holding means 3 includes a cutter unit 31.
And film receiving portions 32 and 33. The leading end of the film F is transferred by both of the film receiving portions 32 and 33 to a film transfer means 4 described later by moving the both ends upward as it is. F is cut off.

The film transport means 4 includes a conveyor 41
, A clamp unit 42, a unit moving unit 43, and a support frame 44. The conveyor unit 41 includes a pair of upper and lower conveyor units 46 driven by a motor 45, and is disposed between the packaging unit 6 and the carrying-in unit 2, which will be described later. This conveyor section 41
The respective conveyors are synchronized with each other, and the pulley 47 at the transfer side end (the right side in FIG. 1) is opened and kept in the unclamped state when the film F is transferred from the film cutting and holding means 3, so that the film F Upon receipt, the film is immediately closed to hold and transport the film F. The clamp unit 42 is composed of a pair of upper and lower clamp units 48 having an opening and closing function (the upper part is fixed and the lower part is movable), and the transferred film F is clamped and stretched, and based on the packaging timing. Thus, the film F is released from the holding state. The unit moving section 43 includes a guide 49, a communication member 410, and an actuator (not shown) for reciprocating. The unit moving section 43 is provided below the support frame 44 that supports the conveyor section 41 and the clamp section 42. The distance between them is adjustable.

The elevating means 5 includes an elevating unit 51 and a link unit 5.
2 and a cam portion 53. The elevating unit 51 is formed so that each of the belt conveyors 23 connected at predetermined intervals is crotched, and the packaged object W is placed on the upper surface of the elevating unit 51 and pushed up. One end of the link portion 52 is pivotally supported by the base end of the lifting / lowering portion 51, and the other end is pivotally supported by a machine frame or the like. The cam portion 53 is provided such that the cam surface is in contact with a midway area of the link portion 52, and the elevating portion 51 is moved up and down by one rotation of the cam by the motor.

The packaging means 6 comprises a first fold 61 and a second fold 62. The first folding part 61 includes the left and right folding plates 6.
3 and a rear folding plate 64. The left and right folding plates 63 and the rear folding plate 64 are each provided with a horizontal moving mechanism (not shown), and are horizontally movable in a positional relationship such that the lower surface of the raised tray T slides on the lower surface. Second fold 62
Is composed of a folding roller 65, and is erected and fixed to a machine frame or the like in a direction orthogonal to the unloading direction in a positional relationship such that the lower surface of the tray T slides when the packaged object W is unloaded.

The unloading means 7 comprises a horizontal moving mechanism (not shown) having a pusher 71 for pushing the side surface of the tray T, and causes the unloading section 72 to unload the article W to be packaged. The sealing means 8 includes a heat sealing portion 81 in which heaters are arranged in parallel. The packaging machine main body control means 9 will be described later together with the weighing label printer control means c1.

The weighing label printer C calculates the price of the product from the unit price set in advance based on the data measured by placing the article to be packaged W on the product placing portion 1 of the packaging machine body B. Calculate, print the price and other product data on label paper and issue it, hold the issued label by suction, and stick it on the film F surface of the packaged article W, It is controlled by the weighing label printer control means c1.

The control means D comprises the above-described packaging machine main body control means (control means) 9 and the weighing label printer control means c1, and the RAM 91 in the wrapping machine main body control means 9 and the weighing label printer control means c1. The storage means E is constituted by the RAMc4.

The packaging machine main body control means 9 includes an interface 92, a ROM 93, a RAM 91, and an operation unit 94.
, A mechanism driving unit 95, and a CPU 96.
Each is connected to the PU 96. Interface 9
Reference numeral 2 denotes a circuit for communicating with the weighing label printer control means c1, which is connected to the interface c2 of the weighing label printer control means c1. ROM 93 is a CPU
A control program for controlling the packaging machine main body B executed by 96 is stored. The RAM 91 is a CPU 9
6, register and tray data R for execution
Is stored. Details will be described later. The operation unit 94 includes a switch for inputting, for example, starting and stopping the packaging machine body B. The mechanism driving section 95 is an interface for directly communicating with each mechanism section of the packaging machine main body B when performing packaging, and includes a motor 54 for driving the lifting / lowering means, a carry-in motor 22 for driving the carry-in means 2, a film Transfer means 4
The motor 45, the product width detection sensor, the product height detection sensor, the pusher detection sensor 27, and the like, which are configured to input and output control signals or detection signals via the mechanism driving unit 95. Loading means 2 related to the present invention
Is supplied with a pulse signal of a step number based on position data described later.

The weighing label printer control means c1 includes an interface c2, a ROM c3, a RAM c4, a display operation unit c5, a weighing unit c6, a printing unit c7, a suction unit driving unit c8, a product detection sensor c9, CPUc10
And each is connected to the CPU c10. The interface c2 is a circuit for communicating with the packaging machine main body control means 9, and is connected to the interface 92 of the packaging machine main body control means 9. ROMc3 is CP
Various programs executed by Uc10 are stored.
RAMc4 has a flag for execution by CPUc10,
A register and product data are stored. Details will be described later. The display operation unit c5 is composed of a keyboard, a liquid crystal panel, and the like, and is configured to input and output various information, and can set product data S and tray data R described later. The weighing section c6 supplies a weighing signal of the packaged object W placed on the product placing section 1 to the CPU c10. The printing unit c7 includes a thermal printer or the like, and issues a label on which a product name, a weight, a price, a unit price, an effective date, a barcode, and the like are printed based on a command from the CPU c10. The suction unit driving unit c8 is a mechanism unit that suctions and holds the issued label and affixes it to the film surface of the packaged object. The product detection sensor c9 detects the presence or absence of a product when attaching a label.

The tray data R stored in the RAM 91 of the packaging machine body control means 9 comprises a tray number, position data, and packaging conditions. The tray number is a number for simple recognition, and this number is used as an identification number, and the following is allocated and stored for each tray number. Position data: Distance data for securing the reference distance H according to the tray to be packed. For example, the number of steps (the number of pulse signals supplied to the stepping motor) of the stepping motor (the carry-in motor 22) up to the reference carry-in position using the tray serving as the reference is used as a reference value, and from the reference value to the desired carry-in position Number of steps (+35 or -40
Etc.) as position data. Packaging conditions: A series of timings related to the packaging of the clamp unit 42 of the film transporting unit 4 and the packaging unit 6 are set with respect to standard timing (timing when a reference tray is used), and the shape of the tray to be packaged (vertical, horizontal). , Height) in order to adjust the timing to match the timing.

RAM of weighing label printer control means c1
The product data S stored in c4 includes a product number, a product name,
It consists of unit price, tare, and tray number. The product number is a number for simple recognition. This number is used as an identification number, and the following items are assigned and stored for each product number. Product name: Name of the product, ie, “High-grade roast for Matsuzaka beef and shabu-shabu” etc. Unit price: For example, unit price per 100 grams, ie, “2000” Tare: For example, tray weight (gram), ie, “25” Tray number… The description is omitted because it is the same as the above.

A series of operations of the stretch wrapping machine A configured as described above will be described with reference to a flowchart shown in FIG. (Step 1) The operator inputs the product number corresponding to the product name to be packaged with the keyboard of the display operation unit c5 while viewing the product data S displayed collectively on the display operation unit c5. (Step 2) When the key is input, the corresponding product data S is read. (Step 3) The tray number stored in the product data S is sent from the CPU c10 to the CPU 96, and the corresponding tray data R (position data, packaging conditions) is read. (Step 4) ... The corresponding packaged object W is placed in the product placing section 1.
To determine whether the weighing value is stable, and when the weighing value becomes stable, a weighing value signal is sent to the weighing label printer control means c1.
Transfer to (Step 5) When the weighing is completed, the carry-in means 2 (belt conveyor 23) is started at a low speed (pulse signals at long intervals are supplied to the carry-in motor 22), and the pusher located at the origin (the standby position of the pusher 26) is started. 26 moves and pushes the article W to be packaged on the product placing section 1. (Step 6) The distance (the number of steps) from the origin to the end of the product placement unit 1 (the side of the lifting / lowering means) is stored in advance, and the product placement unit W is constantly compared by performing comparison judgment. 1 is determined. (Step 7) When the article to be packaged W has passed over the product placing section 1, the article is started at a high speed (a pulse signal at a short interval is supplied to the carry-in motor 22). (Step 8)... The number of steps to the desired carry-in position based on the position data (the number of steps) is constantly compared with the number of steps to determine whether the packaged object W has arrived at the desired carry-in position. Done. (Step 9) The film F cut by a predetermined length by the film cutting and holding means 3 is stretched and held by the film transport means 4, and the packaged object W is pushed up by the upper surface of the elevating part 51 of the elevating means 5. (Step 10) When the push-up is completed, the loading means 2 (belt conveyor 23) is started at a high speed, and the pusher 26 returns to the origin (standby position). (Step 11) Left and right folding plates 63 of the first folding portion 61
And the rear folding plate 64 is horizontally moved to push the edge of the film to perform left / right and rear folding, and
Descends. (Step 12) The pusher 71 of the carrying-out means 7 pushes the rear side surface of the tray T to carry it out to the carrying-out section 72. At this time, the folding roller 6 of the fixed second folding portion 62
When the article to be packaged is moved (unloaded) to the upper part of 5, the package is naturally folded and the packaging and unloading are performed simultaneously. (Step 13) After the price is calculated based on the weighing value signal obtained in Step 4 and the product data, a label on which these data are printed is issued from the printing unit c7, and the suction unit driving unit c8 outputs the label. Then, the issued label is sucked and held, and attached to the film F of the packaged object W. (Step 14) The film F on the lower surface of the article to be packaged W is sealed by the heat sealing section 81 of the sealing means 8 as the carry-out section 72, and the packaging is completed.

Next, a second embodiment will be described with reference to FIG. In the second embodiment, the product placing portion 1 serving also as a weighing dish and the pusher 26 provided in the first embodiment are removed, and activation is performed by a key operation. And the transfer means M, and replaces the position data of the tray data R stored in the RAM 91 of the packaging machine main body control means 9 with pushing data, and operates the carry-in means 2 until the article to be packaged contacts the contact portion L. Since the moving means M is controlled based on the pressing data, the description of the other components is given the same reference numeral and the description is omitted.

The moving means M comprises an actuator for obtaining a linear output. The contact portion L has a rectangular parallelepiped shape and is fixed to the tip of the actuator. The moving means M provided with the abutting portion L at the tip is in the vicinity of the upper surface of the carrying means 2 and in the direction opposite to the carrying direction of the carrying means 2 via the elevating means 5 (right end of the carrying means 2 in FIG. 7). , So that the loaded articles W are pushed on the belt conveyor 23 of the carrying-in means 2 in a direction in which the articles W are to be carried in. The pushing data is distance data for securing the reference distance H according to the tray T to be packed. For example, the distance (30 (millimeter)) to be pushed and moved with respect to the distance of the reference carrying-in position using the reference tray T is set as the pushing data. In the second embodiment configured as described above, the input unit 2 is driven by key input of the product number corresponding to the product name until the packaged object W contacts the contact portion L. The packaged object W is pushed in the direction of digging with the conveying direction based on the pushing data and adjusted to the desired carry-in position. Then, similarly to the first embodiment, the article to be packaged W is packaged and sealed, and the packaging is completed.

In the stretch wrapping machine exemplified in the second embodiment, the RAM 9 of the
The pushing data of the tray data R stored in the storage unit 1 is replaced with the movement amount data, and the abutting portion L is moved to a desired position in advance by the moving means M, the abutting of the articles W to be carried in is stopped and carried in. The position may be set freely. in this case,
The movement amount data is distance data for securing the reference distance H corresponding to the tray T to be packed in the same manner as the pushing data. For example, the distance (3) for moving the contact portion L with respect to the distance of the reference carry-in position using the reference tray T
0 (millimeter)) is the movement amount data.

In this embodiment, the control means D comprises the packaging machine main body control means 9 and the weighing label printer control means c1.
However, it may be configured by only the packaging machine main body control means 9 or may be configured to exclusively control only the loading means 2. Further, in the present embodiment, the starting position of the number of steps is determined by the standby position of the pusher 26 of the loading means 2. However, instead of this, the product placing part 1 and the elevating means 5 are in the middle, and A detection sensor F may be provided above, and the position of the detection sensor F may be used as a starting point of the number of steps. That is, the front end or the rear end of the moved packaged object W is detected by the fixed detection sensor F, The control may be performed based on the position data from the camera, and can be applied to the rear end reference. Furthermore, if the carrying-in means 2 is gradually decelerated as it approaches the stop position, the carrying-in position of the article to be packaged W becomes accurate, and the carrying-in speed in the middle can be increased. Further, the position data may be provided not for each tray but for each product.

[0035]

As described above, the present invention has the following advantages. By allowing the object to be moved to the desired carry-in position to be stopped and stopped, an appropriate carry-in position can be set. Therefore, even if the object to be packaged is pushed up onto the stretched and held film, the front-end reference or the rear-end reference can be obtained. The stress applied to the constituent side of the upper surface of the reference side tray can increase the distance between the constituent side of the upper surface of the tray side of the reference side and the second folded portion, and the distortion (elongation) per unit length of the film decreases. Less. Therefore, it is possible to avoid the problem that the constituent side of the tray upper surface cannot withstand the stress and is crushed or the film is sheared, and it is possible to perform appropriate packaging according to the properties of the tray. According to the fourth aspect, the tray is selected by selecting and inputting a product through a keyboard or the like. Therefore, if the device originally specifies a product, it is not necessary to specify the tray. According to the fifth aspect, the height of the upper surface is set higher than that of the lifting / lowering means.
The carrying-in position is determined only by stopping the carrying-in means (conveyor), and there is no concern that the carrying-in position is shifted when the carrying-in means transfers the articles to be packaged, unlike the conventional carrying-in position set on the elevating means. . Therefore, it is possible to provide an optimal stretch wrapping machine that secures a stable carry-in position and reliably wraps an article to be packaged without causing a packaging defect.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view schematically showing a first embodiment;

FIG. 2 is a sectional view taken along line AA.

FIG. 3 is an enlarged sectional view of BB

FIG. 4 is an explanatory diagram showing an electrical configuration of a control unit.

FIG. 5 is an explanatory diagram showing (a) product data and (b) tray data.

FIG. 6 is a flowchart showing a series of operations.

FIG. 7 is a longitudinal sectional side view schematically showing a second embodiment.

[Explanation of symbols]

T: tray W: packaged item 61: first folding unit
62: second folding part 6: packaging means F: film 2: loading means 2
DESCRIPTION OF SYMBOLS 1 ... Conveyor part 5 ... Elevating means 51 ... Elevating part 4 ... Film transfer means 7 ... Unloading means D ... Control means A ... Stretch wrapping machine E ... Storage means 9 ... Control means (wrapping machine main body control means) R ... Tray data S ... Product data H ... Reference distance L ... Abutment part M ... Transportation means

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B65B 35/26 B65B 11/48 B65B 57/00

Claims (5)

(57) [Claims] 1. A and products and tray and the first fold portion folded by pressing the film edges to the lower surface of the packaged articles made of the said product is placed, write no fold with the unloading of the packaged articles A wrapping means having a second fold, a loading means for loading the packaged material below the packaging means, a lifting means for pushing up the packaging material loaded below the packaging means above the packaging means, and a lower portion of the packaging means Film transporting means for transporting the film to the stretch and holding, and carrying out means for carrying out the packaged object,
In a stretch packaging machine that pushes up the package moved by the loading unit onto the stretched and held film and folds the edge of the film into the lower surface of the package to package the package, the package loaded by the loading unit is placed below the packaging unit. storage means for previously storing the position data for determining the position to be stopped for each type of tray <br/> Lee in, and control means tray controls the loading means on the basis of the position data to be selected A stretch wrapping machine, wherein a movement of a packaged object is freely stopped at a desired carry-in position. Wherein the product and the tray and the first fold portion folded by pressing the film edges to the lower surface of the packaged articles made of the said product is placed, write no fold with the unloading of the packaged articles A wrapping means having a second fold, a loading means for loading the packaged material below the packaging means, a lifting means for pushing up the packaging material loaded below the packaging means above the packaging means, and a lower portion of the packaging means Film transporting means for transporting the film to the stretch and holding, and carrying out means for carrying out the packaged object,
A stretch wrapping machine that pushes up the package moved by the loading unit onto a stretched and held film and folds the film edge to the lower surface of the package to pack the package, wherein the package loaded by the loading unit below the packaging unit. a contact portion for pressing movement in contact with, said each contact portion moving means for moving along the carrying direction of the carrying means, the pushing data to determine the pushing movement amount tray type Storage means for pre-storing, and control means for controlling the moving means based on the pushing data when the tray is selected, so that the pushing of the packaged object at a desired carry-in position can be stopped. Stretch wrapping machine. 3. A product with a first folding unit in which the product is folded by pressing the lower surface to the film edges of the packaged articles comprising a tray to be placed, write no fold with the unloading of the packaged articles A wrapping means having a second fold, a loading means for loading the packaged material below the packaging means, a lifting means for pushing up the packaging material loaded below the packaging means above the packaging means, and a lower portion of the packaging means Film transporting means for transporting the film to the stretch and holding, and carrying out means for carrying out the packaged object,
In a stretch packaging machine that pushes up the packaged object moved by the carrying-in means onto a stretched and held film and folds the film edge portion to the underside of the packaged product for packaging, the packaged goods carried under the packaging means by the carrying-in means. An abutting part for abutting and stopping an object, a moving means for moving the abutting part along the loading direction of the loading means, and a storage means for storing a moving amount data of the abutting part for each type of tray,
Control means for controlling the movement means based on the corresponding movement amount data stored in the storage means when a tray is selected, so that the packaged object can be stopped at a desired carry-in position. Stretch wrapping machine. Wherein said storage means, associated each tray number, the tray data stored position data or pushing data or moving amount data is kicked <br/> with divided, and a product data previously The stretch wrapping machine according to any one of claims 1 to 3, wherein a tray is selected by storing and storing the product, and selecting and inputting a product. 5. The conveyor according to claim 1, wherein the loading means comprises a conveyor section having a plurality of conveyors arranged coaxially at predetermined intervals, and the elevating means is movable up and down so as to cover gaps formed between the conveyors. 2. An elevating part having a top part divided at a predetermined interval, wherein a top surface of the top part is set lower than a top surface of each conveyor when descending.
Stretch wrapping machine as described.