JPH0479612B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a method for manufacturing a collective pot body for raising and transplanting crop seedlings made of paper or a thin film such as paper, and particularly relates to a method for producing a collective pot body for raising and transplanting crop seedlings, which is made of paper or a thin film such as paper, and in particular uses two sheets of thin film to The present invention relates to a method for continuously manufacturing a group of pot bodies in which the pot bodies are arranged in a row from the tip to the end by connecting portions.

(Prior Art) Traditionally, crops have been grown in pots made from paper or paper-like thin films known as paper pots (registered trademark), and seedlings can be grown in pots without removing the pots after the seedlings have been raised. The technique of raising and transplanting seedlings by transplanting them into fields is widely used. There are various types of pots that can be used to raise and transplant seedlings of crops, but in recent years semi- or fully automatic transplanting using machines has been developed in order to save labor and improve work efficiency. For example, as a pot body of a suitable form, a predetermined number of pot bodies shown in Japanese Patent Publication No. 11817/1981 are connected in a row at connecting parts, and a large number of row units are multilayered, and the left and right alternating ends of the multilayer row are made of water-resistant material. A method of manufacturing pot bodies in a continuous row by pasting them with glue has been proposed.

(Problems to be Solved by the Invention) In the conventional method of manufacturing collective pot bodies connected in a row at the connecting part, a band-like body formed by pasting two thin films with water-resistant glue is attached to a predetermined length. cut into pieces,
Next, the cut pieces are alternately reversed in the flow direction, water-resistant glue is applied alternately to the left and right side edges, water-soluble glue is applied to the remaining parts, and the sides to which the water-resistant glue is not applied are applied. The process ends by making the parts protrude alternately and laminating them one after another, which makes the process diversified and complicated, making continuous integrated manufacturing difficult.
A manufacturing method that allows for more efficient continuous and integrated manufacturing has been desired.

(Means for Solving the Problems) In view of the above-mentioned circumstances, this invention was developed as a result of intensive research into more efficient manufacturing of group pot bodies that can be pulled out in rows. This method has been completed to produce a group pot body formed by the method, and this method consists of the following steps, and is characterized by the fact that it can be constructed as a continuous process.

(b) Continuously pull out paper or a first thin film like paper of a predetermined width, and apply water-resistant glue with a width L perpendicular to the pull-out direction on the front and rear ends of the section T set in advance in the pull-out direction. furthermore, a water-resistant glue coated part having a width L with a spacing of approximately 3L except for the glue coated parts at both ends is provided, and this unit is continuously and repeatedly formed as one unit;
The first step is to form a continuous strip by polymerizing and pasting a paper or a second thin film such as paper having the same width as the thin film.

(b) Width L of the glue-applied portion at the rear end of section T of the continuous strip-shaped body
A second step of processing the portion along the front boundary position in the drawing direction to make it easy to bend, and bending the band-like body in a meandering pattern alternating left and right and folding it.

(c) Pull out the folded strip and separate the section T.
A section T that has been processed to be easily bent in the second step by providing a separation line to facilitate separation in the direction of glue application within the position of the glue application part excluding the rear end glue application part.
Water-soluble glue is applied alternately to the front and back sides of the strip using the front boundary in the pull-out direction of the rear end glue application width L as a branch line, and the strip is again folded in a serpentine pattern alternating left and right in the same way as in the second step. The third step is pasting.

(Function) The thin film used for manufacturing the group pot body of the present invention has appropriate rot resistance and physical strength to the extent that it will not be damaged or disintegrated by moisture due to watering etc. during the seedling-raising period or by microorganisms in the soil. A paper or paper-like thin film, the type of which is not particularly limited, but for example, chemical modification of plant cellulose by treating it with a chemical agent (for example, imparting rot resistance by blocking hydrophilic groups)
Paper made from natural pulp alone or mixed with synthetic fibers, or multilayer paper made by polymerizing paper made from natural pulp and paper made from synthetic fibers using physical means or adhesives. Alternatively, paper made from a mixed stock of natural pulp and synthetic fibers, or even paper made from natural pulp treated with an appropriately selected preservative, etc., are used.

This invention is a method for manufacturing a group pot body having a structure in which the connection part and the pot body are alternately continuous without any break by using two appropriately selected continuous thin films, and the process can be carried out in an uninterrupted continuous process. Its greatest strength lies in what it can do. A detailed explanation will be given below with reference to the drawings. 1 to 3 are schematic diagrams illustrating the structure of the strip formed in the first to third steps of the present invention,
FIG. 4 schematically shows an example of a manufacturing process for carrying out the first to third steps, and the present invention is not limited to the examples shown in these drawings.

1st step: A step in which two thin films 1 and 2 are adhered with water-resistant glue applied at a predetermined interval to form a continuous strip 8, and a pre-selected thin film is wound up.
The first thin film 1 and the second thin film 2 are continuously drawn out from R ₁ and R ₂ in the drawing direction A, respectively,
On the upper surface of the first thin film 1, a waterproof glue 4 is applied with a width L at predetermined intervals in a direction perpendicular to the drawing direction A by the first gluing device 3. In this case, the procedure for applying the water-resistant glue 4 is as follows:
Apply glue in a predetermined number of L widths, starting with L widths at intervals of approximately 3L (which will be non-applied areas), then L widths at intervals of approximately 3L, and then applying glue at the end of this number of L widths. The glue applicator 3 is set as the rear end b, and the glue application section T from the front end a to the rear end b is set as one unit, and this unit is continuously repeated. The glue application roller 5 has a structure that enables the application of glue at predetermined intervals, and its operation is controlled by a suitable control mechanism. The thin film 1 coated with the water-resistant glue 4 is pressed against the second thin film 2 by a pressure roll 6 in the drawing direction A.
When the left and right edges of the image are aligned and polymerized and pasted, if necessary, pre-drying is performed via a drying device 7.
A band-like body 8 shown in is formed.

Second step: band-shaped body 8 formed in the first step
Next, a crease processing section 10 is applied by the crease processing device 9 along the front boundary of the application width L of the water-resistant glue 4 on the rear end b in the section T in the drawing direction A to facilitate bending of this section. . As shown in FIG. 2, the crease processing is performed by cutting lines that do not penetrate the band-shaped body 8 or by pressing groove lines. The belt-like body 8a shown in FIG. 2 which has been subjected to the crease process passes through a pull roll 11, and is folded by a folding device 12 from the crease-processed part 10 alternately on the left and right, and is further folded to fully form the belt-like body 8a. Give it a folding habit and proceed to the next process. The folding device 12 may have any structure as long as it has the function of forcing the strip 8a to bend in a meandering manner alternately left and right every predetermined length as described above, and sequentially folding this.
The example shown in FIG. 4 shows a pair of swinging conveyors 14, 14 that can swing in the left-right direction in the drawing using a pair of upper pulleys 13, 13 as fulcrums while sandwiching and conveying the strip 8a. Conveyor 14, 14
a pair of screw guides 15 provided below the
15, the oscillating conveyor 14, 14 has an oscillating width that is the interval from one crease processing part 10 of the strip 8a to the next crease processing part 10 (not shown). While transporting the folding part 8a, the folding part 10 is rotated alternately left and right.
The screw guide 1 continues by forcing the bending from
The bent portions are engaged with the screws 5 and 15 and folded in sequence. The thus folded strip 8a is placed once on the conveyor 16, but is stretched again while being advanced by the conveyor 16 and proceeds to the next step.

Third step: Through the crease processing in the second step, the belt-shaped body 8a, which has been folded from the processing section 10 and has been given a sufficient crease, is moved to the rear end b in the section T by the separation line attaching device 17. A separation line 18 is machined within the coating width L of the water-resistant glue 4 excluding the area to facilitate separation of this area. The form of the separation line 18 is not particularly limited, and may be appropriately selected depending on the transplanting mode of the potted seedling after seedling raising.
Examples include a perforated line passing through the strip 8a, a broken line, or a separation line having a separation guiding part suitable for a fully automatic transplanting machine as shown in Japanese Patent Publication No. 55-30805. The strip-like body 8a to which the separation line 18 has been applied is then folded into the folded part 10.
Water-soluble adhesive lines 19 are applied alternately to the front and back sides of the strip 8a, using the boundary as the boundary. Such gluing of the strip 8a is performed by, for example, using a second gluing device 21 that uses the gluing roll 20 as the running upper surface of the strip 8a, so that the section A from the front end of the strip 8a to the first crease processing part 10 is , a water-soluble glue line 1 is placed on the surface of the strip 8a.
9 is applied, and then the section B from the first crease processed part 10 to the second crease processed part 10 is as follows.
A water-soluble glue line 19 is applied to the back surface of the strip 8a by the third gluing device 23, which uses the gluing roll 22 as the running lower surface of the strip 8a. In the section C up to the processed portion, the second gluing device 21 applies water-soluble glue 19 to the surface of the strip 8a, and the front and back sides of the strip 8a are alternately applied with the crease processed portion 10 as a boundary. can be continuously applied with a water-soluble glue line, in which case the second gluing device 2
The operation of the first and third gluing devices 23 is appropriately controlled by a control mechanism so that they operate intermittently at the above-mentioned glue application intervals.

The second gluing device 21 and the third gluing device 2
The strip 8a coated with the water-soluble adhesive line 19 alternately on the front and back sides according to Step 3 forms a strip 8b shown in FIG. The strip 8b is then sequentially bent in a meandering pattern alternating left and right from the crease processing portion 10, folded, and then pressed and attached as a whole. Such a band-shaped body 8b
For re-bending and folding, for example, the third gluing device 23 sends out the strip 8b using a pull roll 24.
When the tension during traveling is released, the meandering folding pattern of alternating left and right sides forced in the folding device 12 is restored, and the sheets are sequentially accumulated in the lower storage box 25 in a meandering pattern of alternating left and right sides. ,
Take this out and press it all together.

When the folded laminate obtained by successively passing through the first to third steps described above is dried and unfolded, a hexagonal columnar pot body 26 is attached to the connecting part 27, as schematically shown in a plan view in FIG. Therefore r ₁ , r ₂ , r ₃ respectively
... are connected in a row, and each row r ₁ , r ₂ , r ₃ ... is connected by the connecting portions 28 at alternate left and right ends, so that the first pot body 26a and the last pot body 26b are connected in succession. A cluster pot body P that can be pulled out in a row is revealed. When the band-shaped body 8b shown in FIG. 3 is associated with this collective pot body P, the pot body 26 is located between the part where the water-resistant glue 4 is applied and the next part where the water-resistant glue 4 is applied in the band-like body 8b. Corresponds to the non-adhering part 29, and the connecting part 2
Reference numeral 7 corresponds to a part applied with water-resistant glue 4 other than the part b applied with water-resistant glue 4 at the rear end of section T, and a separation line 18 is provided to this connecting part 27. . Furthermore, the connecting portions 28 that connect the pot rows r ₁ , r ₂ , r _{3 .} . . correspond to the application portion b of the water-resistant glue 4.

As described above, the present invention is a method for manufacturing a group of pot bodies that can be drawn out in a continuous row from the tip to the end by using two continuous thin films. Various modifications may be made within the scope of the present invention. For example, in the first step, water-resistant glue 4 is applied to the thin film 1.
When applying the water-resistant glue 4, the water-resistant glue 4 may be applied in a discontinuous manner as shown in FIGS. When raising crop seedlings using the seedling body P, tearing the connecting part 27 from the separation line 18 after raising the seedlings, and transplanting it to the field as a single potted seedling P', the water-resistant glue 4 on the connecting part 27 is not applied. The pasting part 30 is the pot body 2
Since the seedling 31 is in communication with the inside of the seedling 6, rooting of the seedling 31 is facilitated from this non-attached portion 30, and rooting is facilitated in the early stage of transplantation, resulting in early rooting. In addition, when applying the water-soluble glue 19 by the second gluing device 21 and the third gluing device 23, the ridgeline of the pot body 26 formed by expansion (Fig. 5 D, E,
...I) and the glue in the vicinity thereof is omitted, when the folded laminate is unfolded, there is no glue film formed on the ridgeline part of the pot body 26, so it can be easily formed into a specified shape, and the shape becomes more shapely. This creates a well-aligned pot body and reduces the resistance when unfolding. Further, each device shown in FIG. 4 is shown only as an example, and it is perfectly possible to replace it with a device having the same function. This will be explained below using examples.

(Example) Example 1 Width 390 mm containing 3% 8-oxyquinoline copper
Apply water-resistant glue (acrylic emulsion adhesive) to a continuous piece of paper in a width direction perpendicular to the drawing direction.
It was coated at 10 mm intervals at intervals of 30 mm, and then the same paper as above was attached to form a continuous strip. On this occasion,
One unit consisted of 11 adhesive areas with a width of 10 mm and 10 non-adhesive areas with a width of 30 mm, and this unit was continuously repeated to form a strip. In other words, a glue margin of 20 mm in width was made to appear at the boundary between units. After drying the strip with a cylindrical Surf Ace dryer, the above
At the front of the strip in the direction of travel at the boundary between the 20 mm glue margin and the 30 mm non-stick area, cut a cut line of 1.5 mm and a tie of 1.5 mm along the glue margin to the entire width of the strip (390 mm). Then, using a folding device, fold the above-mentioned cut line processing part as a folding part alternately on the left and right sides to make a width of 410 mm.
mm folded strips were made.

The folded strips are sequentially placed on a transfer conveyor, stretched on the conveyor and continuously pulled out, and placed in the center of the 10 mm wide glue margin, perpendicular to the direction of travel of the strip, to a length of 130 mm. A separation line with 5 ties arranged was processed to have a total length of glue (390mm).

After that, one fold of the above-folded strip is taken as one unit, and water-soluble glue (polyvinyl alcohol adhesive) is applied alternately on the front and back sides using this unit as a reference.
Apply the adhesive along the traveling direction of the strip with three 9mm glue lines per width of 130mm, drop it into a stacking container, and fold it again from the folding score line to make 140 sheets. A laminate having one unit was created.

After drying the above laminate, cut it parallel to the traveling direction of the strip at a pitch of 130 mm, and cut it into strips with a diameter of 20 mm and a height of 130 mm.
A hexagonal pot with 1400 mm/book was obtained. This collective pot was expanded, filled with soil, and the beets were grown for 40 days and then transplanted using a fully automatic transplanter.
The transplanting process, including separation, went very smoothly, and we were able to transplant 1,400 pots in succession.

(Effects) According to the present invention, while continuously drawing out two thin films, a series of pot bodies that can be drawn out in a continuous row from the tip to the end can be produced in a continuous process. Because we can manufacture
It is efficient and facilitates process control, greatly contributing to labor savings.

[Brief explanation of drawings]

1 to 3 show the structure of the strip formed in the manufacturing process of this invention, FIG. 4 shows the manufacturing process of one embodiment, and FIG. 5 shows the development of the group pot body manufactured in FIG. 4. FIG. 6 shows a state in which water-resistant glue is applied to the joint, and FIG. 7 shows an example of a potted seedling separated into one individual. 1... First thin film, 2... Second thin film, 3...
First gluing device, 4... Water-resistant glue, 8... Band-shaped body, 9... Crease processing device, 10... Crease processing section, 8a, 8b... Band-shaped body, 12... Folding device, 17... ...Separation line attachment device, 18...Separation line,
19...Water-soluble glue line, 21...Second gluing device,
23... Third gluing device, 26... Hexagonal columnar pot body, 28... Connection portion, a... Front end of section T, b
... Rear end of section T, P ... group of pot bodies, T ... glue application section, r ₁ , r ₂ , r ₃ ... ... row of pot bodies.

Claims (1)

[Scope of Claims] 1. A method for manufacturing a group pot body for raising and transplanting seedlings, characterized by comprising the first to third steps described in (a) to (c) below. (b) Continuously pull out paper or a first thin film like paper of a predetermined width, and apply water-resistant glue with a width L perpendicular to the pull-out direction on the front and rear ends of the section T set in advance in the pull-out direction. A water-resistant glue coated part with a width of L is provided with an interval of approximately 3L excluding the glue coated parts at both ends, and this unit is continuously and repeatedly formed as a unit to form the first thin film. The first step is to form a continuous strip by polymerizing and pasting paper or a second thin film such as paper having the same width as the paper. (b) Width L of the glue-applied portion at the rear end of section T of the continuous strip-shaped body
A second step of processing the portion along the front boundary position in the drawing direction to make it easy to bend, and bending the band-like body in a meandering pattern alternating left and right and folding it. (c) Pull out the folded strip and separate the section T.
A section T that has been processed to be easily bent in the second step by providing a separation line to facilitate separation in the direction of glue application within the position of the glue application part excluding the rear end glue application part.
Water-soluble glue is applied alternately to the front and back sides of the strip using the front boundary in the pull-out direction of the rear end glue application width L as a branch line, and the strip is again folded in a serpentine pattern alternating left and right in the same way as in the second step. The third step is pasting. 2. The method of manufacturing a group pot body for raising and transplanting seedlings according to claim 1, wherein the application of the water-resistant glue of the first thin film is discontinuous orthogonal to the drawing direction of the thin film. 3. The method for manufacturing a group pot body for raising and transplanting seedlings according to claim 1, wherein the water-soluble glue is applied alternately to the front and back sides of the strip except for the area corresponding to the ridge line of the pot body.