JPH09308851A - Resin-coated pipe and adhesive applicator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin-coated pipe with improved adhesive properties between the pipe body and the resin layer and an adhesive applicator used when this resin-coated pipe is manufactured. SOLUTION: An adhesive tank 13 is provided on the lower part of a housing 2 and an adhesive 14 is stored in this adhesive tank 13. A pair of holders 18 and 19 are provided finely adjustably in the approaching and separating directions approximately at the center of the top face 4 of the housing 2. Shafts 20 and 21 are respectively freely rotatably inserted through each of holders 18 and 19 and the top end part side of these shafts 20 and 21 are linked to a motor through a transmission gear. Felt rollers 22 and 23 are respectively fixed on the lower end parts of the shafts 20 and 21 inserted in the housing 2. The top end part sides of a pair of these felt rollers 22 and 23 are exposed in open air in the housing 2 and the bottom end part side thereof are immersed in the adhesive 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin-coated pipe in which the surface of a tubular body is coated with a resin, and an adhesive coating device used when manufacturing the resin-coated pipe.

[0002]

2. Description of the Related Art Conventionally, as a resin-coated pipe, a metal pipe whose surface is coated with a resin is known. This resin-coated tube is manufactured by manufacturing a long metal tube in advance, then applying a molten resin to the surface of the metal tube, and solidifying the applied resin.

[0003]

However, such a conventional resin-coated pipe has a single-layer structure in which only the resin layer is laminated on the surface of the metal pipe. For this reason,
When this is processed when manufacturing a predetermined article using this resin-coated tube, when the metal tube is bent or twisted during processing, the resin layer on the surface cannot follow the surface change of the metal tube, The adhesion with the metal tube is lost. As a result, the resin layer shifts or wrinkles occur, and the appearance quality of the processed resin-coated pipe deteriorates.

The present invention has been made in view of such conventional problems, and is used in the production of a resin-coated pipe having improved adhesion between a tubular body and a resin layer, and this resin-coated pipe. It is an object of the present invention to provide an adhesive coating device.

[0005]

In order to solve the above problems, in a resin-coated pipe according to the present invention, an adhesive is applied to the surface of the pipe in the longitudinal direction of the pipe by a roller capable of impregnating the adhesive. Is spin coated to form an adhesive layer, and the resin layer is covered via the adhesive layer. Therefore, since the resin layer is adhered to the surface of the tubular body in the longitudinal direction by the adhesive layer, the resin layer is firmly adhered to the tubular body by the adhesive layer, and the resin-coated pipe is bent or twisted. At this time, loss of adhesion of the resin layer to the tubular body is suppressed.

Further, in the adhesive applying device of the present invention, an adhesive tank containing the adhesive is provided, the lower end side is immersed in the adhesive, and the upper end side is above the adhesive. A pair of rollers that can be impregnated with the adhesive, which are exposed in the space, are provided, and a tube is inserted in the length direction between the upper end portion side in a direction orthogonal to the pair of rollers. ing. In such a configuration, since the lower ends of the pair of rollers are immersed in the adhesive, the lower ends are constantly impregnated with the adhesive and move to the upper ends due to the capillary phenomenon. Therefore, when the pipe body is inserted between the upper ends of the pair of rollers, the adhesive is applied to the surface of the pipe body as the pipe body is inserted. In this way, the adhesive is applied to the pipe body via the roller by the capillary phenomenon, so it does not fly into the air unlike spraying, and therefore the dispersion of harmful substances such as organic solvents is small. The deterioration of the working environment can be suppressed. Then, a resin is further applied to the tubular body having an adhesive applied to the surface thereof, whereby a resin-coated pipe in which the resin layer is coated on the surface of the tubular body via an adhesive layer is completed.

Further, if the adhesive tank and the roller are housed and arranged in a substantially hermetically-sealed housing, the release of harmful substances into the atmosphere is further suppressed. In addition, by providing a replenishment mechanism for replenishing the adhesive in the adhesive tank, the adhesive is appropriately replenished in the adhesive tank whose adhesive has decreased with the application to the tubular body. Can be continued to be applied.

Further, by further providing an overflow mechanism for guiding the adhesive replenished above the predetermined liquid level to the outside in the adhesive tank, the adhesive replenished above the predetermined liquid level can be led out to the outside. The excessive rise of the liquid level of the adhesive is prevented. Therefore, the roller is not excessively dipped in the adhesive, and the amount of application to the pipe body is not excessive.

On the other hand, in an adhesive coating device according to another structure of the present invention, a pair of vertical rollers arranged substantially vertically and capable of impregnating the adhesive, and a pair of vertical rollers intersecting with the vertical rollers in the vicinity thereof. A pair of horizontal rollers arranged in the vertical direction and capable of impregnating the adhesive, and a supply mechanism for supplying the adhesive to each of the rollers, and the pair of horizontal rollers in the direction orthogonal to the rollers. The tubular body is configured to be inserted in the longitudinal direction between the space and the pair of vertical rollers. In such a configuration, when the adhesive is supplied from the supply mechanism to the rollers, the rollers are impregnated with the adhesive. Then, when the pipe is inserted between the pair of horizontal rollers and the pair of vertical rollers in a direction orthogonal to each roller, the adhesive impregnated in each roller is transferred to the surface of the pipe. , An adhesive is applied to the surface of the tubular body. At this time,
Since the adhesive is applied from the four sides to the surface of the tubular body by a pair of vertical rollers and horizontal rollers, the adhesive is applied to the entire circumference of the tubular body without spraying the adhesive. You can

Further, the supply mechanism includes a supply port for dropping the adhesive on each of the pair of vertical rollers, and a supply port for dropping the adhesive on an upper roller of the upper and lower horizontal rollers. To have. That is, the vertical roller is coated with the adhesive from each supply port, while the horizontal roller is coated with the adhesive from the supply port only to the upper roller. Then, the adhesive remaining on the upper roller drips onto the lower roller, and the adhesive is applied to the surface of the tubular body from the four sides by the pair of vertical rollers and horizontal rollers as described above. Therefore, the adhesive can be applied to the entire circumference of the tubular body surface while simplifying the apparatus without intentionally providing a supply port corresponding to the lower roller that constitutes the horizontal roller.

Further, by arranging the rollers and the supply ports in a substantially hermetically-sealed housing, it is possible to suppress the release of harmful substances such as organic solvents into the atmosphere. Further, according to the present invention, in the opposite side walls of the housing, a feed hole for feeding the pipe body and a feed hole for feeding the pipe body coated with the adhesive are formed. A shutter for closing both holes is provided on each of the side walls, leaving a gap between the side wall and the tube. Therefore, without scraping off the applied adhesive,
Release of hazardous substances into the atmosphere can be suppressed as much as possible.

Further, since the roller is a felt roller in which felt is wound on the surface, fine irregularities are formed on the surface of the adhesive applied to the tubular body according to the thickness of the felt fiber. Therefore, by further applying a resin to the adhesive having fine irregularities on the surface, the resin layer and the adhesive layer are firmly bonded, and even if bending or twisting is performed, the resin layer and the tubular body It is possible to obtain a resin-coated tube that is unlikely to be misaligned.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the adhesive application device 1 according to the present embodiment has a housing 2, which includes a bottom surface 3, an upper surface 4, a front surface 5, a rear surface 6, a left side surface 7, And a right side surface 8 integrally. Circular delivery holes 9 and delivery holes 10 are provided at the opposite sides of the left and right side faces 7 and 8, and these holes 9 and 10 are larger than the metal pipe 11 to which the adhesive is applied. It is formed to a diameter.

A pair of shutters 12 and 12 having semicircular cutouts 12a are formed on the outer surfaces of both side surfaces 7 and 8 at opposite ends. The shutters 12, 12 are slidable in the directions of approaching and separating as indicated by arrows a, a in FIG.
Leaving a minute gap between the metal tube 11 and the metal tube 11
It is configured to close both holes 9, 10.

From the delivery hole 10, as will be described later,
The metal pipe 11 with the adhesive applied to the peripheral surface is led out,
The gap is formed by applying adhesive to the peripheral surface of the shutter 1
It is preferable that it is as small as possible as long as 2, 12 are not in contact with each other. Further, in this embodiment, the shutters 12 and 12 slidable in the above-described direction are used. However, a plurality of types of shutters 12 and 12 having different notches 12a having different radii of curvature are prepared, and the metal pipe 11 is provided. The shutters 12, 12 having the cutouts 12a having the corresponding radii of curvature may be selectively attached to the both side surfaces 7, 8 according to the diameter of the.

At the lower part of the housing 2, there is provided an adhesive agent tank 13 separated by the other surfaces 3 and 5 to 8 except the upper surface 4, and the front surface 5 is accommodated in the adhesive agent tank 13. A level meter 15 for displaying the liquid level 14a of the adhesive 14 thus prepared is provided. In addition, the overflow pipe 1 is provided on the bottom surface 3.
6 is inserted and arranged. An upper end 16a of the overflow pipe 16 is located below the holes 9 and 10, and an overflow tank 17 is connected to the lower end of the overflow pipe 16.

At a substantially center of the upper surface 4 of the housing 2, a pair of holders 1 is provided on both sides of an imaginary line connecting the holes 9 and 10.
As shown by arrows b and b in FIG. 1, reference numerals 8 and 19 are provided so that they can be finely adjusted in the directions of approaching and separating from each other. Shafts 20 and 21 are rotatably inserted into the holders 18 and 19, respectively, and upper ends of the shafts 20 and 21 are linked to a motor via a reduction mechanism (not shown). As shown in FIG. 3, one shaft 20 is driven in the clockwise direction (arrow c direction), and the other shaft 21 is driven in the counterclockwise direction (arrow d direction). Has been done.

Further, felt rollers 22 and 23 are fixed to the lower ends of the shafts 20 and 21 which are inserted into the housing 2. The felt rollers 22 and 23 are formed by winding a felt 24 around a cylindrical core member connected to the lower ends of the shafts 20 and 21. The felt 24 has a large fiber diameter and a coarse mesh, and has the elasticity that allows the felt 24 of both the felt rollers 22 and 23 to contact the entire surface of the metal tube 11. As shown in FIG. 2, in the pair of felt rollers 22 and 23, the liquid surface 14a of the adhesive 14 contained in the adhesive tank 13 is
Even at the maximum level, which is the same level as the upper end 16a of the overflow pipe 16, the upper end sides 22a and 23a thereof are arranged at a height position where they are exposed to the air in the housing 2. Further, both felt rollers 22 and 23 have such a length that the lower end portions 22b and 23b thereof are immersed in the adhesive 14 even at the maximum level and a position slightly lower than the maximum level.

The holes 9 and 10 are located above the liquid level 14a at the maximum level, and the felt roller 2
It is provided at a position corresponding to a substantially central portion in the vertical direction of 2, 23.

On the other hand, on the upper surface 4 of the housing 2, a supply pipe 25 is arranged so as to penetrate therethrough, a valve 26 is inserted in the middle of the supply pipe 25, and a replenishment tank 27 is connected to the upper end. There is. The replenishment tank 27 is provided with a lid 27 a that can be opened and closed, and contains the same adhesive or solvent as the adhesive 14 contained in the adhesive tank 13.

In the present embodiment having the above-mentioned structure, the adhesive coating device 1 is arranged on the upstream side of the resin-coated pipe manufacturing line, and the delivery hole 9 is provided on the downstream side, that is, in front of the left side surface 7. A resin coating device that coats a resin on the metal pipe 11 that protrudes out of the housing 2 through the housing, and a transfer mechanism that pulls the metal pipe 11 from the resin coating device and transports the metal pipe 11 in the downstream direction (direction of arrow f) are sequentially arranged. To be done. And
When operating this resin-coated pipe production line, the interval between the holders 18 and 19 is adjusted so that the interval between the felt rollers 22 and 23 is set to an interval corresponding to the diameter of the metal tube 11. The metal tube 11 is inserted through the feeding hole 10, the felt rollers 22 and 23, and the feeding hole 9 in order.
The tip is made to reach the transfer mechanism.

Further, while visually observing the level meter 15, the valve 26 is opened and closed to replenish the adhesive tank 13 with the adhesive or solvent in the replenishment tank 27, and the liquid surface 14a of the adhesive tank 13 is replenished. The maximum level is set in advance. At this time, if the adhesive 14 is excessively supplied to the adhesive tank 13,
The excess amount flows down into the overflow tank 17 through the upper end portion 16a of the overflow pipe 16, so that the liquid level 14a is maintained at the maximum level. Therefore,
Lower ends 22b, 23b of both felt rollers 22, 23
The side is immersed in the adhesive 14 in the adhesive tank 13, and the upper end sides 22a and 23b are impregnated with the adhesive 14 due to the capillary phenomenon. The replenishment tank 27 is sufficiently replenished with an adhesive or a solvent.

When the preliminary work is completed in this way, a predetermined switch is operated to operate the resin coated pipe production line. Then, the metal pipe 11 is transferred in the downstream direction (direction of arrow f), and in synchronization with the transfer speed of the metal pipe 11, the shaft 20 of one of the shafts 20 is rotated clockwise (direction of arrow c). The other shaft 21 is driven counterclockwise (direction of arrow d). As a result, the felt rollers 22 and 23 are connected to the upper end side 22a,
The adhesive 14 is applied to the peripheral surface of the metal tube 11 while enclosing the entire peripheral surface of the metal tube 11 between the two sides 23b.

That is, the adhesive 14 in the adhesive tank 13
Is impregnated in the felt rollers 22 and 23 by the capillary phenomenon and then applied to the metal tube 11 through the felt rollers 22 and 23. Therefore, unlike the case where the adhesive is sprayed by the spray method, the adhesive does not fly in the air, and the harmful hazardous substances such as the organic solvent are less dispersed, so that the working environment can be improved.

Moreover, in this embodiment, since the gap between the holes 9 and 10 and the metal tube 11 is closed by the shutters 12 and 12, the housing 2 is maintained in a substantially sealed state. Therefore, the release of harmful hazardous substances such as organic solvents contained in the adhesive 14 into the atmosphere is further suppressed, and the working environment can be improved.

Further, the lower ends 22b and 23 of the felt rollers 22 and 23 are coated with the adhesive agent applied to the metal tube 11.
When the amount of the adhesive 14 in the adhesive tank 13 has decreased until just before b is exposed from the liquid surface 14a (which can be confirmed by a level meter), the valve 26 is opened to remove the adhesive or solvent in the replenishment tank. The adhesive tank 13 is replenished. At this time, in the same manner as described above, when the adhesive 14 is excessively supplied to the adhesive tank 13, the excessive amount flows down into the overflow tank 17 through the upper end 16a of the overflow pipe 16, , The liquid surface 14a is maintained at the maximum level. Therefore, both felt rollers 22 and 23 are not excessively immersed in the adhesive agent 14 in the adhesive agent tank 13,
As a result, the adhesive 14 can be applied to the peripheral surface of the metal tube 11 without excess or deficiency.

When the adhesive 14 is applied to the peripheral surface of the metal tube 11 in this manner, the adhesive 14 is applied, the metal tube 11 is sent out from the sending hole 9, and then the resin applying device is used. Further resin is applied. Then, as shown in FIG. 4, the resin-coated tube 30 having the adhesive layer 28 made of the adhesive 14 on the surface of the metal tube 11 and the resin layer 29 applied by the resin application device is manufactured.

In such a resin-coated tube 30, the resin layer 2
9 is firmly adhered to the metal tube 11 because it is adhered to the surface of the metal tube 11 by the adhesive layer 28. Therefore, when the resin-coated pipe 30 is bent or twisted, the resin layer 29 is not easily separated from the metal pipe 11, and the resin tank 29 follows the surface change of the metal pipe 11.
Therefore, the resin layer 29 is not displaced or wrinkled, and the appearance quality of the resin-coated tube 30 after processing is not deteriorated, and a processed product of the resin-coated tube 30 having excellent appearance quality is obtained. be able to.

Moreover, in this embodiment, since the felt rollers 22 and 23 are used, the surface of the adhesive applied to the metal tube 11 is made of felt fibers as shown in FIG. Fine unevenness 14a according to the thickness
Occurs. Therefore, by further applying a resin to the adhesive having the fine irregularities on the surface, the resin layer 29 and the adhesive layer 28 are firmly bonded to each other, and the resin layer 29 is bent or twisted. It is possible to obtain the resin-coated tube 30 in which the metal tube 11 and the metal tube 11 are less likely to be displaced.

In the first embodiment,
As shown in FIG. 3, one felt roller 22 is clockwise (direction of arrow c) and the other felt roller 23 is counterclockwise (direction of arrow d), that is, both felt rollers 2
2, 23 were rotated in the forward direction along the transfer direction of the metal tube 11. However, as shown in FIG. 5, one felt roller 22 is rotated counterclockwise (arrow d direction) and the other felt roller 23 is rotated clockwise (arrow c direction).
That is, both felt rollers 22 and 23 may be rotated in the opposite direction against the transport direction of the metal tube 11. Further, in this embodiment, the felt rollers 22 and 23 around which the felt 24 is wound are used.
Not limited to this, other rollers such as a sponge roller having a sponge on the surface may be used as long as the adhesive 14 can be impregnated.

FIG. 6 shows another embodiment of the present invention, which is an adhesive application device 31 according to the present embodiment.
Has a housing 32, which includes a bottom surface 33, a top surface 34, a front surface 35, a rear surface 36, a left side surface 37,
And a box body integrally having the right side surface 38. Circular delivery holes 39 are formed in the opposite sides of the left and right side surfaces 37, 38.
And a feeding hole 40 are provided, and both holes 39, 40 are provided.
Has a diameter larger than that of the metal tube 11 to which the adhesive is applied. It should be noted that the shutters 12 and 12 similar to those in the above-described embodiment may be provided on the outer surfaces of the side surfaces 37 and 38.

At the substantially center of the upper surface 34 of the housing 32,
A pair of holders 48, 49 are provided on both sides of an imaginary line connecting the holes 39, 40 so that they can be finely adjusted in the approaching and separating directions, as in the first embodiment. Vertical shafts 50 and 51 are rotatably inserted into the holders 48 and 49, and the upper end portions of the vertical shafts 50 and 51 are
It is linked to the motor via a reduction mechanism (not shown). Further, vertical felt rollers 52 and 53 having the same structure as the felt rollers 22 and 23 described above are provided at the lower ends of the vertical shafts 50 and 51 that are inserted into the housing 32.

On the other hand, horizontal shafts 60 and 61 are rotatably inserted through the rear surface 36 of the housing 32, and the outer ends of the horizontal shafts 60 and 61 are linked to the motor through a reduction mechanism (not shown). There is. Housing 32 for horizontal shafts 60, 61
The felt roller 2 described above is attached to the tip portion inserted into the inside.
Horizontal felt roller 6 having the same structure as 2, 23
2, 63 are provided near the vertical felt rollers 52, 53. The horizontal shafts 60 and 61 are also provided by the holder similar to that of the above-described first embodiment so that the horizontal shafts 60 and 61 can be finely adjusted in the approaching and separating directions.

On the other hand, outside the housing 32, an adhesive tank 64 for containing the adhesive 14 is arranged. A timer-type pump 65, which operates intermittently, is arranged in communication with the upper surface of the adhesive agent tank 64, and a supply pipe 25 is also arranged through it. This supply pipe 2
A valve 26 is inserted in the middle of 5, and a replenishment tank 27 is connected to the upper end. The replenishment tank 27 is provided with an openable / closable lid 27a, and contains the same adhesive as the adhesive 14 contained in the adhesive tank 64.

Further, one end of a main tube 66 is connected to the pump 65, and branch tubes 67 and 68 are connected to the other end of the main tube.
One of the branch tubes 67 has two vertical felt rollers 5
A pair of vertical supply ports 69, 69 opened on the felts 24 of 2, 53 are communicated with each other, and a horizontal supply port 70 opened on the horizontal felt roller 62 located above is communicated with the other branch tube 68. Has been done.

In the present embodiment having the above-mentioned structure, the adhesive coating device 31 is also arranged on the upstream side of the resin coating pipe manufacturing line, and on the downstream side thereof, outside the housing 32 via the delivery hole 39. A resin coating device that coats the resin on the protruding metal pipe 11 and a transfer mechanism that pulls the metal pipe 11 from the resin coating device and transports the metal pipe 11 in the downstream direction (arrow f direction) are sequentially arranged. When operating this resin-coated pipe production line, the interval between the vertical felt rollers 52, 53 and the horizontal felt rollers 62, 63 is set to an interval corresponding to the diameter of the metal tube 11, and
Insert the metal tube 11 into the feed hole 40 and the vertical felt rollers 5
2, 53, the horizontal felt rollers 62, 63, and the delivery hole 39 are sequentially passed through to reach the transfer mechanism.

When a predetermined switch is operated to operate the resin coated pipe manufacturing line, the pump 65 first operates for a predetermined time and then stops before the transfer of the metal pipe 11 in the downstream direction is started. Then, the pump 65 repeats the operation and the stop for this predetermined time. Then, when the pump 65 operates, the vertical felt roller 5 passes through the main tube 66, the branch tube 67, and the both vertical supply ports 69, 69.
The adhesive 14 is supplied to 2, 53. Also, the adhesive 14
Is supplied to the upper horizontal felt roller 62 via the main tube 66, the branch tube 68, and the horizontal supply port 70, and then to the lower felt roller 63 via the upper horizontal felt roller 62. .

Thereafter, the transfer of the metal tube 11 is started and synchronized with the speed thereof, and the felt rollers 52, 53,
When the rollers 62, 63 are rotated, these rollers 52, 53,
The adhesive impregnated in 62, 63 is applied to the peripheral surface of the metal tube 11. At this time, since the adhesive is applied to the surface of the metal tube 11 from the four sides by the pair of vertical felt rollers 52 and 53 and the horizontal felt rollers 62 and 63, the adhesive is not sprayed. In both cases, the adhesive can be reliably applied to the entire circumference of the surface of the metal tube 11.

When the adhesive agent 14 is applied to the peripheral surface of the metal tube 11 in this manner, the adhesive agent 14 is applied and the metal tube 11 is delivered from the delivery hole 39. Further resin is applied. As a result, as shown in FIG. 4, the resin-coated tube 30 having the adhesive layer 28 made of the adhesive 14 and the resin layer 29 on the surface of the metal tube 11 is manufactured.

Incidentally, also in the second embodiment,
Connect the felt rollers 52, 53, 62, 63 to the metal tube 11
The rotation may be performed in the forward direction along the transfer direction of or in the opposite direction. Further, in each of the embodiments, the case where the metal tube 11 having a circular cross section is used as the tube body is shown, but the present invention is not limited to this, and a metal tube having a non-circular cross section or a non-metal tube may be used. .

[0041]

As described above, in the resin-coated pipe of the present invention, an adhesive layer is formed on the surface of the tubular body by applying the adhesive in a longitudinal direction of the tubular body by a roller capable of impregnating the adhesive. ,
Since the resin layer is covered via the adhesive layer, the resin layer can be firmly adhered to the tubular body in the longitudinal direction by the adhesive layer. As a result, it is possible to prevent the inconvenience of loss of adhesion of the resin layer to the tubular body when the resin-coated pipe is bent or twisted.

Further, the adhesive applying device of the present invention comprises an adhesive tank containing an adhesive, a lower end side thereof being immersed in the adhesive, and an upper end side thereof being exposed in a space above the adhesive. Further, a pair of rollers capable of being impregnated with the adhesive is provided, and the adhesive is applied to the pipe body via the rollers. Therefore, unlike the case of spraying, it does not fly in the air, so there is little dispersion of harmful substances such as organic solvents, and it is possible to apply adhesive to this surface while suppressing the deterioration of the working environment. Becomes

Further, since the adhesive tank and the roller are housed and arranged in a substantially hermetically-sealed housing, it is possible to further suppress the release of harmful substances into the atmosphere and to maintain a good working environment. Can be formed. Further, since the replenishing mechanism for replenishing the adhesive is provided in the adhesive tank, it is possible to continuously apply the adhesive to the pipe body.

Further, since the overflow mechanism for guiding the adhesive supplied above the predetermined liquid level to the outside is provided in the adhesive tank, it is possible to prevent the liquid level of the adhesive from rising excessively. Therefore, the roller is not excessively dipped in the adhesive, and it is possible to prevent the excessive application of the adhesive to the pipe body.

Further, in the present invention, a pair of vertical rollers and horizontal rollers both of which can be impregnated with the adhesive, and a supply mechanism for supplying the adhesive to each of these rollers are provided. Therefore, it is possible to apply the adhesive to the entire circumference of the surface of the tubular body without spraying the adhesive by the spray method by the pair of the vertical roller and the horizontal roller. As a result, it becomes possible to reliably apply the adhesive to the entire surface of the tubular body while suppressing the deterioration of the working environment.

The supply mechanism has a supply port for dropping the adhesive on each of the pair of vertical rollers, and a supply port for dropping the adhesive on the upper roller of the horizontal rollers arranged above and below. It was configured. Therefore, the adhesive can be applied to the entire circumference of the surface of the tubular body while simplifying the device without intentionally providing a supply port corresponding to the lower roller that constitutes the horizontal roller. In addition, by arranging the rollers and the supply ports in a substantially hermetically-sealed housing, it is possible to suppress the release of harmful hazardous substances such as organic solvents into the atmosphere.

Further, according to the present invention, a feed hole for feeding the pipe body and a feed hole for feeding the pipe body coated with the adhesive are formed on the opposite side walls of the housing.
A shutter for closing both holes was provided by leaving a gap between the tube and the tube. Therefore, it is possible to suppress the release of harmful substances into the atmosphere as much as possible without scraping off the applied adhesive.

Further, since the roller is a felt roller in which felt is wound on the surface, fine irregularities corresponding to the thickness of the felt fibers are formed on the surface of the adhesive applied to the tubular body. You can Therefore, by further applying a resin to the adhesive having fine irregularities on the surface, the resin layer and the adhesive layer are firmly bonded, and even if bending or twisting is performed, the resin layer and the tubular body It is possible to manufacture a resin-coated tube that is unlikely to be misaligned.

[0049]

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of an adhesive application device according to an embodiment of the present invention.

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

FIG. 3 is a perspective view of a main part.

FIG. 4 is a vertical sectional view of a resin-coated tube.

FIG. 5 is a diagram showing a case where the felt roller is rotated in different directions.

FIG. 6 is a partially cutaway perspective view showing another embodiment of the present invention.

[Explanation of symbols]

 1 Adhesive Coating Device 2 Housing 9 Outlet Hole 10 Inlet Hole 11 Metal Pipe 12 Shutter 13 Adhesive Tank 16 Overflow Pipe 27 Supply Tank

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location B05D 7/24 301 B05D 7/24 301P

Claims (10)

[Claims] 1. An adhesive layer is formed on a surface of a tubular body by a roller capable of impregnating the adhesive in a longitudinal direction of the tubular body to form an adhesive layer, and a resin layer is covered through the adhesive layer. A resin-coated tube characterized by: 2. An adhesive tank containing an adhesive is provided,
A pair of rollers that can be impregnated with the adhesive, in which the lower end side is immersed in the adhesive and the upper end side is exposed in the upper space of the adhesive, are provided in a direction orthogonal to the pair of rollers. An adhesive applying device, characterized in that a pipe is inserted between the upper end portions in the lengthwise direction. 3. The adhesive application device according to claim 2, wherein the adhesive tank and the pair of rollers are housed and arranged in a substantially sealed housing. 4. The adhesive application device according to claim 2, wherein a replenishing mechanism for replenishing the adhesive is provided in the adhesive tank. 5. The adhesive application device according to claim 2, further comprising an overflow mechanism for guiding the adhesive supplied to a level above a predetermined liquid level to the outside in the adhesive tank. 6. A pair of vertical rollers disposed substantially vertically and capable of impregnating an adhesive, and a pair of vertical rollers disposed in the vicinity of the pair of vertical rollers in a direction intersecting with the pair of vertical rollers and capable of impregnating the adhesive. A pair of horizontal rollers and a supply mechanism for supplying an adhesive to each of these rollers are provided, and a tubular body is extended between the pair of horizontal rollers and the pair of vertical rollers in a direction orthogonal to each roller. An adhesive application device characterized in that it is inserted in the vertical direction. 7. The supply mechanism includes a supply port for dropping an adhesive on each of the pair of vertical rollers, and a supply port for dropping an adhesive on an upper roller of the upper and lower horizontal rollers. The adhesive application device according to claim 6, comprising: 8. The adhesive application device according to claim 6, wherein each of the rollers and each of the supply ports are housed and arranged in a substantially hermetic housing. 9. A feed hole for feeding the pipe body and a feed hole for feeding the pipe body coated with the adhesive are formed in opposite side walls of the housing, and 9. The adhesive application device according to claim 3, wherein each side wall is provided with a shutter that closes both holes while leaving a gap between the side wall and the tube body. 10. The adhesive application device according to claim 2, wherein each of the rollers is a felt roller whose surface is made of felt.