JP3118576B2 - Uncured curable resin impregnation equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a repair device for partially repairing a buried conduit from the inside of a pipe by using an adhesive repair material in which a sheet-like reinforcing material is impregnated with an uncured curable resin. The present invention relates to an uncured curable resin impregnating apparatus used for producing an adhesive repair material.

[0002]

2. Description of the Related Art As is well known, an adhesive repair material wound around a repair device for partially repairing a buried pipe from inside the pipe is manufactured by hand. FIG. 7 is a view for explaining a conventional method for producing an adhesive repair material by impregnating a sheet-like reinforcing material with a thermosetting resin, and FIG. 8 is a longitudinal sectional view schematically showing the adhesive repair material. First, a glass cloth a and a nonwoven fabric b, which are sheet-like reinforcing materials, are cut into required dimensions to obtain four glass cloths a and two nonwoven fabrics b. Next, a vinyl sheet d is laid on the worktable c, and one glass cloth a is spread on the vinyl sheet d. Subsequently, a thermosetting resin liquid e containing a curing agent is applied onto the glass cloth a while hanging down on the glass cloth a and evenly extending with a roller f (or a rubber spatula) having a thread. At that time, the glass cloth a and the thermosetting resin liquid e are impregnated while removing air so that an air layer is not formed. Subsequently, one nonwoven fabric b is laid on the layer of the thermosetting resin liquid e, and similarly, the thermosetting resin liquid e hangs on the nonwoven fabric b and is uniformly spread by the rollers f. that time,
An air layer is not formed between the layer of the thermosetting resin liquid e that is a lower layer with respect to the nonwoven fabric b and the nonwoven fabric b, and the thermosetting resin liquid that is an upper layer with respect to the nonwoven fabric b Impregnation is performed while venting air so that an air layer is not formed between the layer e and the nonwoven fabric b. Subsequently, the thermosetting resin liquid e is applied and impregnated on the two glass cloths a and the subsequent nonwoven fabric b in the same manner. Finally, one piece of glass cloth a is laid on the layer of the thermosetting resin liquid e to complete the application / impregnation work, and the adhesive repair material 1 is obtained.

[0003] The adhesive repair material 1 obtained in this manner is used for construction work to be wound around the body of the repair device to partially repair the buried conduit from inside the pipe.

[0004]

As described above, the conventional method for producing an adhesive repair material is a manual operation, and therefore requires skill in uniform application of a thermosetting resin liquid and air bleeding. There is a problem in that the quality of the produced adhesive repair material is different, and the adhesive repair material has an uneven thickness when adhered and cured inside the pipe. In addition, the thermosetting resin liquid, the pot life is adjusted by blending the curing agent in advance, and the effective curing time is set, so if it takes time to work on manufacturing the adhesive repair material, In addition, there has been a problem that the work of applying and impregnating the thermosetting resin liquid is complicated by time.

[0005] In view of the above problems, attempts have been made to realize an impregnating apparatus capable of automatically impregnating a sheet-like reinforcing material such as glass cloth or nonwoven fabric with a thermosetting resin liquid. Pipes that need to be repaired are scattered in various places in the work of partially repairing from the inside, and the pot life attached to the impregnation equipment was adjusted by moving by the repair work vehicle to that place and the heat was adjusted The curable resin liquid is cured by the time it moves to the next repair place, and after the thermosetting resin that has adhered to the device and has been cured is softened with a solvent such as trichlene every time and removed using a knife or the like, Without this, the new thermosetting resin liquid application / impregnation operation cannot be performed, and automation has been postponed because the work efficiency is rather lowered.

Accordingly, an object of the present invention is to provide an apparatus for impregnating a curable resin which can form an adhesive repair material without performing the work of removing the cured resin every time. .

[0007]

The technical problem can be solved by the present invention as described below. That is, the present invention provides an adhesive repair material wound around a repair device that partially repairs a buried conduit from inside a pipe using an adhesive repair material in which a sheet-like reinforcing material is impregnated with an uncured curable resin. A curable resin impregnation device in an uncured state used for manufacturing a pair of adjacent tubular impregnating rollers that rotate so as to send the adhesive repair material downward, and the pair of cylinders. A pair of release sheets passed from above to below between the pair of tubular impregnating rollers so as to respectively cover the upper side of the body of the tubular impregnating rollers, and the body of the tubular impregnating rollers respectively covered by the release sheets A pair of partition plates having a wedge-shaped lower portion along the floor surface shape arranged with a gap between the floor surface so as to partition a long valley formed as a floor surface from both sides, and Air is blown to the outer side surfaces of the pair of partition plates And air nozzles respectively arranged for the pair of partition plates so that the sheet-like reinforcing material is passed between the pair of cylindrical impregnating rollers from top to bottom by the pair of partition plates. After filling the partitioned long valleys with the uncured curable resin liquid, the cylindrical impregnating roller is rotated to feed the release sheet and the sheet-like reinforcing material while the curable resin is cured to the sheet-like reinforcing material. When forming the adhesive repair material by impregnating the resin liquid, the curable resin liquid leaking from the gap by injecting air from the air nozzle toward the partition plate is partitioned by the pair of partition plates. It is designed to be pushed back into the elongated valley.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view showing an impregnating apparatus according to the present invention, FIG. 2 is a perspective view showing a tubular impregnating roller of the impregnating apparatus shown in FIG. 1, and FIG. 3 is a view showing the cylindrical impregnating roller shown in FIG. FIG. 4 is an enlarged perspective view of the partition plate shown in FIG. 2, and FIG. 5 is a long view of the curable resin liquid leaking from a gap between the body of the cylindrical impregnating roller and the partition plate. FIG. 6 is a vertical cross-sectional view schematically showing a pressure-sensitive adhesive repairing material sandwiched by a release sheet. In these figures, the same reference numerals as those in FIG. 7 and FIG. 8 are used. Indicates the same or corresponding portion, and 2 indicates a sheet-like reinforcing material (glass cloth a, non-woven fabric b)
Impregnating device for continuously forming the adhesive repair material 1 by simultaneously impregnating the sheet-like reinforcing material with an uncured curable resin in which a curing agent is mixed into the sheet-like reinforcing material. Gears 5 and 5 are fixed to the cylindrical impregnating rollers 3 and 3 respectively, and a chain 7 is hung endlessly on the gears 5 and 5 via a tension gear 6. The impregnated cylindrical rollers 3, 3 are rotated (in the direction of the arrow shown in FIG. 1) by the driving of the motor 8 so as to feed the adhesive repair material 1 formed downward. In addition, one end of a crank arm 9 is axially mounted on the cylindrical impregnating roller 3 on the left side in FIG.
Has a function of sliding the left cylindrical impregnated roller 3 laterally within the required width with the support shaft 11 as a fulcrum by the piston movement of the air cylinder 10. Thereby, the operation of the crank arm 9 causes the left cylindrical impregnating roller 3 to be in close contact with the right cylindrical impregnating roller 3 and a gap 12 having a required width.
(Refer to FIG. 4). Reference numeral 13 denotes a curved guide for guiding the formed adhesive repair material 1 (see FIG. 6), and is arranged along the gap 12 below the gap.

On the uppermost stage of the gantry 4, two nonwoven fabric magazines 14 wound with a nonwoven fabric b are arranged side by side, and in the middle stage, four glass cloth magazines 15 wound with a glass cloth a are arranged side by side. Below the lower cylindrical impregnating rollers 3, 3, release sheet magazines 16 each of which is wound with a plastic release sheet g are horizontally laid. Reference numeral 17 denotes a guide roller for guiding the glass cloth a of the glass cloth magazine 15 laid on both ends of the middle stage to the gap 12 from the outside.

Reference numeral 18 designates an elongated valley 20 which is formed as a floor surface 19 (see FIG. 2) on the body upper side of the cylindrical impregnated rollers 3, 3 covered with the release sheet g. This is a partition plate having a wedge-shaped lower portion 18a along the floor surface shape, provided with a gap 21 (see FIG. 4) between the floor plate 19 and the floor surface 19. An adjusting screw portion 22 for moving the partition plate 18 up and down and right and left is provided so that a gap 21 can be provided between the adjusting screw portion 22 and the adjusting screw portion 22 is penetrated by an adjusting shaft 23 of the gantry 4. If the screw 22a of the adjusting screw portion 22 is loosened, the partition plate 18 can be moved right and left on the adjusting shaft, and if the screw 22b of the adjusting screw portion 22 is turned, it can be moved up and down. Also, partition plate 1
The long valley 20 surrounded by 8 and 18 is filled with a required amount of an uncured curable resin liquid 24 containing a curing agent.

Further, each of the partition plates 18 is provided with an air injection nozzle 25 variably inclined by an L fitting 26 so that air can be blown downward from the upper side of the partition plate 18 toward the lower side. By this, a long valley
When the required amount of the curable resin liquid 24 is poured into 20, the curable resin liquid 24 becomes the wedge-shaped of the floor surface 19 of the elongated valley 20 and the partition plate 18, as shown in FIG. 5A. As shown in FIG. 5A, the wedge-shaped lower portion 18a of the partition plate 18 is separated from the air jet nozzle 25.
When the air is jetted toward the hard disk, the curable resin liquid 24 that tends to leak from the gap 21 is pushed back into the long valley 20 by the wind pressure of the jetted air.

Next, a method for producing the adhesive repair material will be described.

First, the air cylinder 10 is actuated to slide the cylindrical impregnating roller 3 on the left side in FIG. 1 through the crank arm 9 to provide a gap 12 having a required width between the cylindrical impregnating rollers 3 and 3. The release sheets g, g are pulled out from the mold sheet magazines 16, 16, respectively, and a gap 12 is formed from above the outside of each of the cylindrical impregnation rollers 3, 3 so that the upper body of the cylindrical impregnation roller 3 is covered by the release sheet g. , And pull out the tip to the position of the guide 13, and then press the cylindrical impregnation rollers
A floor surface 19 made of a release sheet g is formed on the upper side of the body.
The nonwoven fabric b and the glass cloth a are also pulled out from the two nonwoven fabric magazines 14 laid on the upper stage of the gantry 4 and the four glass cloth magazines 15 laid on the middle stage, respectively.
Similarly, it is pulled out to the position of the guide 13 through 12.

Subsequently, the air cylinder 10 is operated to shift the left cylindrical impregnating roller 3 to a width, and the cylindrical impregnating rollers 3
3 and the screws 22a and 22 of the adjusting screw portion 22
b, the partition plate 18 is moved up, down, left and right, and a gap 21 having a required width is formed between the floor surface 19 of the elongated valley 20 and the wedge-shaped lower portion 18a of the partition plate 18.
Is provided.

Next, in a state where air is jetted from the air jet nozzle 25 toward the wedge-shaped lower portion 18a of the partition plate 18, a hardening agent is compounded in the elongated valley 20 surrounded by the partition plates 18, 18. A required amount of the uncured curable resin liquid 24 is poured.

Thereafter, the air cylinder 10 is operated so as to obtain the adhesive repair material 1 having a required thickness, thereby forming a gap 12 having a required width between the cylindrical impregnating rollers 3 and 3, and the motor 8
Is driven to rotate the cylindrical impregnating rollers 3, 3.
Is formed in a state sandwiched by the release sheet g and extruded from below the gap 12.

After the adhesive repair material 1 sandwiched by the release sheet g is cut into a length that goes around the body of the repair device, the release sheets g, g are peeled off and wound around the body of the repair device. To use.

In the present embodiment, a pair of tubular impregnating rollers 3, 3 are laid horizontally adjacent to each other, and the upper surfaces of the body of the tubular impregnating rollers 3, 3 are covered with release sheets g, g. The floor surface 19 of the elongated valley 20 formed by the impregnating rollers 3 is partitioned with the release sheets g, g laid thereon so as to sandwich the elongated valley 20 from both sides of the elongated valley 20. Since the plate 18 is arranged, even if the elongated valley 20 is filled with the uncured curable resin liquid 24 containing a curing agent, the curable resin liquid 24 does not adhere to the cylindrical impregnating rollers 3. Absent. Further, in order to rotate the cylindrical impregnating rollers 3, 3, a wedge-shaped lower portion 18a of the partition plate 18 is provided.
The partition plate 18 is arranged with a gap 21 between it and the floor surface 19, but since the air is sprayed obliquely from above toward the wedge-shaped lower portion 18a of the partition plate 18, curability is Resin liquid
24 does not leak.

The curable resin liquid 24 adheres to the side surface of the partition plate 18 on the long valley side. The amount of the curable resin liquid 24 is small, and the floor surface 19 is covered with release sheets g. And the wedge-shaped lower part 18a of the partition plate 18 and the floor surface 19
Is provided with a gap 21 between the curable resin liquid
Even if the 24 is hardened, the gap 21 is not closed, and there is no problem in the next impregnation operation. It should be noted that even when the cured resin is peeled off, it can be easily removed because the amount is small.

The glass cloth a, the nonwoven fabric b, and the release sheet g are sequentially fed into the curable resin liquid 24 by rotation of the cylindrical impregnating rollers 3, 3, and the glass cloth a and the nonwoven fabric b
The adhesive repair material 1 is formed by passing through the gap 12 set to a required width while being applied and impregnated with the curable resin liquid 24, so that uniform impregnation and air bleeding in the laminate can be automatically performed and uniform. The adhesive repair material 1 having a large thickness can be obtained.

Further, since the adhesive repair material 1 is sandwiched by the release sheet g, when the formed adhesive repair material 1 is cut into a length that can be wound around the body of the repair device, scissors or the like are used. The uncured curable resin liquid 24 does not adhere to the substrate and can be easily cut.

The laminated structure of the adhesive repair material is shown in FIGS.
However, the present invention is not limited to this, and a laminated structure most suitable for the type and diameter of the pipe to be repaired may be employed. Accordingly, the thickness of the adhesive repair material changes accordingly, and the amount of the curable resin liquid used and the width of the gap are also changed as necessary.

As the release sheet, a polyethylene film having a thickness of about 30 to 50 μm is most suitable in terms of releasability, strength and cost, but a nylon film may be used. If the partition plate is made of resin, it can be easily peeled off by scraping off the cured resin. Further, as the sheet-like reinforcing material, nonwoven fabric, glass cloth, or the like may be used alone or in combination.

As the curable resin, a thermosetting or photocurable resin may be used. When a photocurable resin is used, a release sheet that blocks light may be used. Further, in addition to the curing agent, a curing accelerator, a curing retarder and the like may be added to the curable resin liquid.

If the viscosity of the curable resin liquid is adjusted to 50 to 180 centipoise, the gap is set to about 1 mm, and air is blown from a nozzle having a diameter of about 3 mm at a wind pressure of about 0.5 kgf / cm ^2. Injection may be performed so that the maximum delivery speed of the adhesive reinforcing material is about 1 m / min.

[0027]

As described above, according to the present invention, it is not necessary to cut the sheet-like reinforcing material into required dimensions in advance, and it is possible to automatically perform uniform impregnation and air release in the laminate. In addition, a new adhesive repair material can be formed without washing the device with a solvent or the like after use, and anyone can easily handle it regardless of the proficiency of the impregnation work.

Further, the impregnating apparatus according to the present invention manufactures and stores an adhesive repair material in advance in a factory using a thermosetting resin which is not affected by pot life, and reduces the length to a required length each time. It can also be applied to cut and use.

Therefore, it can be said that the industrial applicability of the present invention is very high.

[Brief description of the drawings]

FIG. 1 is a front view showing an impregnation device according to the present invention.

FIG. 2 is a perspective view showing a cylindrical impregnating roller of the impregnating device shown in FIG.

FIG. 3 is a side view of the cylindrical impregnated roller shown in FIG.

FIG. 4 is an enlarged perspective view of a partition plate shown in FIG.

FIG. 5 is a diagram illustrating a method of pushing a curable resin liquid leaking from a gap between a body of a cylindrical impregnating roller and a partition plate back into a long valley.

FIG. 6 is a longitudinal sectional view schematically showing an adhesive repair material sandwiched between release sheets.

FIG. 7 is a diagram illustrating a conventional method for producing an adhesive repair material by impregnating a sheet-like reinforcing material with a thermosetting resin.

FIG. 8 is a longitudinal sectional view schematically showing an adhesive repair material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Adhesive repair material 2 Impregnation device 3 Cylindrical impregnation roller 4 Stand 5 Gear 6 Tension gear 7 Chain 8 Motor 9 Crank arm 10 Air cylinder 11 Support shaft 12 Gap 13 Guide 14 Non-woven fabric magazine 15 Glass cloth magazine 16 Release sheet magazine 17 Guide roller 18 Partition plate 18a Wedge-shaped lower part 19 Floor surface 20 Long valley 21 Gap 22 Adjusting screw part 22a, 22b Screw 23 Adjusting shaft 24 Curable resin liquid 25 Air injection nozzle 26 L fitting a Glass cloth b Non-woven fabric c Work table d Vinyl sheet e Thermosetting resin liquid f Roller g Release sheet

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B05C 3/00-3/20 B29B 15/10-15/14 B29C 63/34

Claims (1)

(57) [Claims] An adhesive repair material wound around a repair device for partially repairing a buried conduit from inside a pipe using an adhesive repair material in which a sheet-like reinforcing material is impregnated with an uncured curable resin. An uncured curable resin impregnating device used for manufacturing, comprising: a pair of adjacent tubular impregnating rollers that rotate so as to send the adhesive repair material downward, and the pair of cylindrical impregnating rollers. A pair of release sheets passed from above to below between the pair of tubular impregnating rollers so as to cover the upper body of the impregnating roller, respectively, and the upper body of the tubular impregnating rollers respectively covered by the release sheets A pair of partition plates having a wedge-shaped lower part along the floor surface shape arranged so as to partition a long valley formed as a floor surface from both sides with a gap between the floor surface and the floor surface; Blow air to the outside sides of a pair of partition plates. And air nozzles respectively arranged with respect to the pair of partition plates so that
After the sheet-shaped reinforcing material is passed between the pair of cylindrical impregnating rollers from above to below, and filled with the uncured curable resin liquid, the long valleys separated by the pair of partition plates are filled with the curable resin liquid. When the impregnating roller is rotated to feed the release sheet and the sheet-like reinforcing material and the sheet-like reinforcing material is impregnated with a curable resin liquid to form the adhesive repair material, the partition from the air nozzle is used. Curable resin in an uncured state, characterized in that curable resin liquid leaking from the gap by injecting air toward the plate is pushed back into the elongated valley partitioned by the pair of partition plates. Resin impregnation equipment.