JPS6137602Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention consists of a bag making device, a binding device, and a hot air device, and the bag forming device includes a bag formed from a heat-shrinkable film. The present invention relates to a packaging machine in which, after filling the bag with items to be packaged and tying the opening of the bag in the tying device, the hot air device heat-shrinks the other portions of the bag except for the rim.

(Prior Art) Conventionally, a hot air device is provided at the rear of a bag making device, and a heat-shrinkable bag formed by the bag making device is supplied to the hot air device, and the bag is formed by the heating action of the hot air device. There has been provided a device that shrinks the material and tension-wrappes the object to be packaged. Such tension packaging has the advantage that the packaged items, such as fruits and vegetables, are less likely to be damaged during the distribution process, but heat-shrinkable films tend to harden due to heat shrinkage, and the volume of the packaged items also increases. Once the bag is opened, it is impossible to reseal the opened part, since the bag has been shrunk to its maximum extent in response to the above. Therefore, after dispensing a portion of the packaged items such as vegetables, the bag is unsuitable for storing the remaining vegetables in the same bag.

(Problems to be solved by the invention, etc.) In view of the above-mentioned points, the present invention uses a heat-shrinkable packaging material to tension-wrap the packaged item while maintaining flexibility at the opening of the packaging material, allowing the opening and closing of the opening. An object of the present invention is to provide a packaging machine that can form packages that can be freely performed.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a shaft 26 for supporting a strip-shaped film F, a cylinder making mechanism 5 for processing the film into a cylinder shape, and a cylinder making mechanism 5 for processing the film into a cylinder shape. a conveyor 6 for pulling the film at the rear of the tube-making mechanism; and a conveyor 6 for cutting the cylindrical film to a certain length and sealing one end at the rear of the tension conveyor. In order to form a bag A with the other end open, a bag making device 1 is formed by a cutter 7 having a heater element only on the rear side of the blade 8. A conveyor 2 is provided after the bag making device so as to have the function of receiving the bags being carried behind the cutter and changing the direction of each bag in a row and conveying them. A device for converging the openings of the bags and a tying device 3 for wrapping a binding band B around the openings of the bundled bags are provided, and a box 21 is placed on the conveyor 2 at the rear of the tying device, and the bags A are placed on the sides of the box. The hot air device 4 is provided with a continuous gap 25 that allows the opening of the hot air device 4 to protrude outward.

(Function) The bag-making device described above continuously pulls out the film supported on the shaft by a tension conveyor and forms it into a tube by a tube-making mechanism. Further, the objects to be packaged are successively fed into the tube by the supply means, and the objects to be packaged are arranged at equal intervals in the tube. Furthermore, a cutter having a heater element only on the rear side of the blade cuts and seals the tube between each packaged object to form bags with one end open one after another, and inserts each bag in a column at the end of the bag making device. Carry it out. A conveyor provided at the rear of the bag-making device receives bags one after another as they are carried out from the device, and acts to convert the conveyance direction of each bag into rows.
After wrapping a binding band around the mouth of each bag using a binding device provided in the middle of this conveyor, each bag is guided into a box equipped with a hot air device to heat-shrink the bag. In this case, since the opening of the bag is configured to protrude outside the box through the gap, the bag maintains its flexibility at the opening, and the binding band can be untied to form a package that can be opened and closed freely. can.

(Example) Embodiments of the present invention will be described below based on the drawings.

In the embodiment shown in FIG. 1, a bag making device 1 and a tying device 3 are arranged along a conveyor 2 having a conveying function in a direction perpendicular to the direction in which bags are conveyed in the bag making device.
and a hot air device 4 are provided.

The bag-making device 1 described above is constructed by sequentially installing a cylinder-making mechanism 5, a tension conveyor 6, and a cutter 7 from the front, and within the scope of the embodiment, the device itself does not include any particularly new structure. , cutter 7
is equipped with a heater element only on the rear side 9 of the blade 8, and is not equipped with a heater element on the front side 10 of the blade.

Next, as shown in FIG. 2, the binding device 3 has a pair of endless chains 12 and 13 arranged vertically along the conveyor 2 supported by an appropriate number of chain foils, and each of the chains 12, 13 are respectively provided with gripping pressure pieces 14 and 15, and belt material support shafts 16 and 17 are provided above and below the chains 12 and 13, and a pair of cut rolls 18 and 19 are provided between the two chains. There is.

Further, in the hot air device 4, a box 21 is installed so as to surround the conveyor 2 as shown in FIG. 23 and a heater 24, and a gap 25 is formed in the side surface of the box 21 along the conveyor 2.

In FIG. 1, when the heat-shrinkable film F supported in the form of a roll on the shaft 26 is pulled and unraveled by the tension conveyor 6, the film F is formed into a tube by the tube-making mechanism 5, and then sent to the cutter 7 to form a predetermined shape. cut to length. Since the cutter 7 is equipped with a heater element only on the rear side 9 of the blade 8, the bag is welded only at the rear side cut by the blade 8, that is, from the tube side, only the front end 27 of the tube is welded. A is mass-produced one after another. When the film F is formed into a tube by the tube-making mechanism 5, by sequentially supplying the objects to be packaged into the tube, the objects to be packaged are stored in each bag A, A... be done. Then, each bag A formed by the bag making apparatus 1 is transferred to the conveyor 2 at the rear thereof and receives the conveyance function of the conveyor 2. The conveyor 2 has the function of transporting each bag A laterally, but during the transport process, each bag A is subjected to the action of a binding device 3 as described below. That is, in FIG. 2, the upper chain 12 moves counterclockwise at a higher speed than the conveyor 2, and the lower chain 13 moves counterclockwise at a higher speed than the conveyor 2.
Because each rotates clockwise at a slower speed than the
two pieces 14 provided on both chains 12, 13;
In the process of moving from left to right in the drawing, 15 relatively approaches due to the speed difference and squeezes the opening of bag A slightly. A pair of cutters 18 and 19 provided near the rear ends of the chains 12 and 13 are connected to binding bands supported on the shafts 16 and 17, respectively, with pressure-sensitive adhesive tapes B and B, such as Sellotape (trademark). They are arranged so that they are sandwiched and rotated intermittently so that the two tapes B,
When it reaches between B, it rotates by a predetermined angle, cuts the tapes B, and stops. This result bag A
The opening is bound between the adhesive surfaces of two adhesive tapes B and B. After that, the bag A is transferred to the hot air device 4.
is carried into the box 21 from the entrance of the box 21.
Hot air circulates inside the box 21 through a duct 22, and therefore, as shown in FIG.
Since the upper part protrudes from the side hole 25, it does not shrink.

Note that as the binding band B, it is also possible to bind the bag opening with a coated metal wire, for example, and therefore, as the binding device 3, it is of course possible to use a device having a known structure other than that shown in the drawings.

(Effects) As mentioned above, the present invention is constructed by installing a conveyor after the bag making device 1, and installing a binding device 3 and a hot air device 4 along the conveyor 2. Since a hole 25 is formed on the side surface to allow the opening of the bag A to protrude outside, the bag is heat-shrinked in the area below the binding band B, as shown in Figure 4, thereby preventing damage to the packaged items. In addition to being able to shrink-wrap without wrapping, the area above the binding band B retains its flexibility without being heat-treated and has a flexible lip, so it is possible to untie the binding band B and make a small part of the packaged item. After taking it out,
This has the effect of mass producing a packaged product in which the bag can be resealed as it is and the remaining packaged items can be stored.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the present invention, Fig. 2 is a - line view of the previous figure, and Fig. 3 is - of Fig. 1.
The line view, FIG. 4, is an explanatory diagram of the packaged product. DESCRIPTION OF SYMBOLS 1... Bag making device, 2... Conveyor, 3... Binding device, 4... Hot air device, 21... Box, 24... Heater, 25... Gap hole.

Claims (1)

[Scope of utility model registration request] A shaft 26 that supports a strip-shaped film F, a barrel making mechanism 5 that processes the film into a tubular shape, a means for supplying an object to be packaged into the barrel making mechanism, and a shaft 26 that supports the film F in the form of a belt, a means for supplying the object to be packaged into the barrel making mechanism, and a shaft 26 that supports the film F in the form of a strip, a tube making mechanism 5 that processes the film into a tube shape, a means for supplying the object to be packaged into the tube making mechanism, and a means for supplying the object to be packaged into the tube making mechanism. pulling conveyor 6
At the rear of the tension conveyor, a heater element is installed only on the rear side of the blade 8 to cut the cylindrical film to a certain length and form a bag A with one end sealed and the other end left open. A bag making device 1 is formed by a cutter 7 having a cutter 7, and the bags conveyed in a column by the bag making device are received at a rear part of the cutter, and the direction of each bag is changed into a row. A conveyor 2 is provided after the bag making device to have a conveying function, and along the conveyor, a device for gathering the openings of each bag and a binding device 3 for wrapping a binding band B around the openings of the gathered bags are provided. At the same time, at the rear of the bundling device, a hot air device 4 is provided, which covers the conveyor 2 with a box 21 and has a continuous gap 25 formed in the side surface of the box to allow the opening of the bag A to protrude outward. A bag-forming packaging machine is provided.