JPH0723852Y2 - Light curable coating sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a photocurable coating sheet, and more particularly to a photocurable coating sheet that is convenient for coating various members such as insulation of a transmission tower.

[Prior Art] Wild birds such as crows or snakes fly in and in, and bring good conductors such as metal bodies into facilities that support outdoor electric wires, such as power transmission towers and utility poles. There are cases. If such a situation is left unattended, an electric accident such as a short circuit or a ground fault may occur.

As a countermeasure for these, there is a method of escaping / eliminating by appealing to the sight and hearing of birds and beasts, but it could not be said to have sufficient effect. There is also a method of removing the nest, but it has no effect on flying or invading animals that do not create a nest, and the Bird and Animal Protect Law requires the permission of the prefectural governor.

As a solution to this problem, light curable insulating resin is used to cover the armpits of power transmission towers, tension bars, armrests of anchoring metal parts, utility poles, etc. There is a measure to use a curable insulating sheet that completely insulates so as to prevent an electric accident such as a short circuit or a ground fault even if there is a jump or an intrusion.

[Problems to be solved by the invention] However, when the above-mentioned insulating sheet is used, since the arms and tension bars have different lengths and shapes, it is necessary to use a large number of appropriately sized insulating sheets. It is necessary to coat the insulating sheets one by one, and in order to obtain sufficient durability, weather resistance, adhesiveness or insulating property, it is required that the insulating sheets are closely attached without any gap.

However, such a photocurable sheet has a relatively large size depending on the adherend, and is difficult to handle in high places such as steel towers where the scaffolding is poor, and it is more difficult to handle because it is sensitive to light. In addition, it is very labor-consuming to try to satisfy both the point that work must be completed in a short time to prevent hardening before deposition and the point that precision is required for the work at the same time. There was a risk that the yield would decrease.

Therefore, the present invention adopts the following configuration in order to solve the above problems.

[Means for Solving Problems] That is, the gist of the present invention is to provide a flexible and shape-retaining photocurable sheet, and seal both sides of the photocurable sheet and at least one side thereof. The side is provided with a sealing layer having a light shielding layer for curing the curable sheet, and a positioning mark for an adherend or a bonding jig provided on the sealing layer, and the photocurable sheet and the The photocurable coating sheet is characterized in that the sealing layer and the photocurable sheet are adhered and fixed by the adhesive force of the photocurable sheet.

[Operation] According to the photocurable coating sheet of the present invention, since the photocurable sheet has flexibility and shape retention, the adherend can be covered at a predetermined position. Moreover, since the sealing layers are provided on both sides, the useful components of the photocurable sheet hardly leak during storage and transportation. Furthermore, a light-shielding layer that prevents the photocurable sheet from being cured is provided on at least one surface side of the sealing layer. For this reason,
When used under sunlight or other light, the curing time can be adjusted freely.

Further, since the positioning mark for the adherend or the attachment jig is provided on the sealing layer that is tightly fixed to the photocurable sheet having shape retention property, the position of the positioning mark with respect to the predetermined position of the photocurable sheet does not change. . By this,
Whether it is directly attached to the adherend or is fixed to the attaching jig and then adhered to the adherend, the positioning can be extremely easily and accurately performed. Moreover, since the positioning mark is indirectly provided on the sealing layer that can be peeled off after the photocurable sheet is attached, the positioning mark does not remain on the photocurable sheet after the completion of the covering operation. Here, the sealing layer may be removed before curing if the shielding layer is integrated, or if the sealing layer and the shielding layer can be separated from each other, only the light shielding layer is removed before curing, The sealing layer may be removed after curing. Therefore, it is not necessary to delete or hide the positioning mark, and it can be used conveniently. The above is an important action especially when a precise work must be performed in a short time at a high place where the scaffolding is poor.

[Embodiment] Next, an embodiment of the present invention will be described. The present invention is not limited to these, and includes various embodiments without departing from the scope of the invention.

FIG. 1 is a plan view showing a first embodiment of the present invention, and FIG. 2 is an enlarged view of the AA cross section.

The photocurable coating sheet 1 is layered in such a manner that the photocurable sheet 3 is sandwiched between two sealing layers 5 and 7 made of transparent plastic films, and the periphery of the sealing layers 5 and 7 is further covered with a plastic tape, It is formed by sealing with an adhesive seal tape 9 such as a cloth tape. As a result, the light curable sheet 3 inside is completely sealed, and its components do not leak out. Further, a light shielding layer 25 is provided on the upper sealing layer 5 via an adhesive material 23. This is to prevent the photo-curable sheet 3 from being hardened so that the bonding becomes impossible even when the mounting work takes a long time. It is also suitable when working with a jig described later. Furthermore, the light shielding layer 25
A tape of a color different from that of the photo-curable sheet 3 is linearly adhered to the center of the surface of the sheet to form a positioning mark 11.

The photocurable sheet 3 is a mixture of various photocurable resins such as an ultraviolet curable resin composition and a visible light curable resin composition, and in particular, from the viewpoint of working outdoors, light having a wavelength included in the mode rays is used. The type which is cured by is preferable. This photocurable resin composition is a curable resin alone, or further various fillers, glass fibers, antioxidants, rust preventives, combustion inhibitors, heat stabilizers, colorants, solvents, plasticizers, etc. are appropriately selected.・
It is mixed and prepared. The property of the photocurable resin composition may be such that it adheres to the adherend without dripping until it is cured by light at room temperature. For example, styrene monomer,
An example is a sheet-like material in which a glass fiber contains a photocurable unsaturated polyester resin containing an unsaturated alkyd (produced from unsaturated dibasic acid, saturated dibasic acid and glycol) and a photopolymerization initiator. If a photopolymerization initiator is appropriately selected, it can be cured with ultraviolet rays having a wavelength of 365 to 410 nm, and can be cured at room temperature for 2 to 5 minutes under sunlight.

An example of manufacturing the photocurable sheet 3 and the sealing layers 5 and 7 will be described. First, the fiber length for photocurable unsaturated polyester
20-40% by weight of the total glass fiber of 40-60mm is mixed, and the predetermined amount is sandwiched between transparent sealing layers 5 and 7 made of PVA (polyvinyl alcohol) film, sheet size 1x2m, thickness 1-6mm To press-mold. Incidentally, the photocurable sheet 3
May be a so-called prepreg sheet in which an appropriate curing agent, filler, etc. are appropriately mixed and semi-cured.

Since the sealing layer 7 of the photocurable coating sheet 1 molded as described above is transparent, in order to prevent it from being cured during storage / transportation, a bag or the like that blocks at least light of a wavelength that causes a reaction, etc. Multiple sheets are stored in. For example, a bag made of an aluminum laminated film, a black polyethylene bag, a black paper bag, or the like is used for visible light or ultraviolet light. In the case of blocking ultraviolet rays, the bag may be a white bag and is not limited to a black bag.

If this is to be attached to the armor, tension bar, armor such as the anchor fittings and utility poles, anchor fittings, and pull-down part of the power transmission tower, the procedure is as follows. First, the light is blocked and one photocurable coating sheet 1 is taken out from the storage bag. Next, cut the seal part around it with a cutter knife etc. in a straight line,
Remove the sealing tape 9. The state is the photocurable coating sheet 1 shown in FIG. The lower sealing layer 7 is peeled off from the sheet 1 and removed. In this way, the surface of the photocurable sheet 3 which has not been cured is exposed. Next, the exposed surface of the photocurable sheet 3 is applied to the arm 13 or the corner 13a of the tension bar 13 using the mark 11 on the back as a guide. Mark 11
Thus, the accurate mounting position of the seat 1 can be easily determined. Further, in the sheet 1, if the photo-curable sheet 3 and the sealing layer 5 are transparent, the corner portion 13a can be seen as it is, and the work can be performed more accurately and quickly.

Next, the both sides 1a and 1b of the mark 11 are wrapped so that the outer circumference of the arm bar or the tension bar 13 is wound. Thus, the state shown in FIG. 4 is obtained. The adhesive 23 is not shown in FIG. After mounting as described above, the light shielding layer 25 can be removed and exposed to sunlight to cure in 2 to 5 minutes. This cured product has sufficient insulation. If the sealing layer 5 is removed after curing, the photocurable sheet 3 has a smooth surface and is exposed. This exposed surface does not require finishing treatment, and no base treatment is required when painting.

In addition, as a second embodiment, as shown in FIG. 5, after the photocurable sheet 3 is sandwiched between the sealing layers 5 and 7 without using the sealing tape 9, light is irradiated only to the peripheral edge, As shown in FIG. 6, a hardened portion 27 may be formed around the periphery to seal it. In this case, the sticking work of the seal tape 9 is not required at the time of manufacturing.
At the time of construction, the hardened portion 27 is removed with a cutter or the like.

The exposure of the peripheral portion of the second embodiment may be performed by the method shown in FIG. That is, since the peripheral portion is exposed by disposing the light-curing sheet 3 and the light-shielding layer 25 having a smaller area than the sealing layer 5, if the exposure is performed as it is, it can be located at a desired position without using a special irradiation device. A seal can be formed. In addition, the periphery of the light-shielding layer 25 serves as a ruler, so that even a simple cutter can be easily cured into an accurate straight line 27
Can be cut out.

The shape of the mark is not limited to the band shape, and as shown in FIG. 8, small marks 29 such as triangles and circles may be provided only on the edges of necessary portions. The position is not limited to the central portion and may be laterally unevenly distributed depending on the adherend and the construction method.

In addition, when the hardened portion 27 enters inward from the edge portion of the light shielding layer 25, the cut line 31 is provided at the edge portion 33 as shown in FIG.
It may be provided inside by a predetermined distance d. Further, as shown in FIG. 10, cut lines 37 of various sizes combined with the marks 35 may be provided on the light shielding layer 25 in accordance with the sizes of the armrest and the tension bar.

Next, a description will be given of the contents of construction performed using the sticking jig.
An example of the attachment jig 51 is shown in the plan view of FIG. 12 and the front view of FIG.

The sticking jig 51 includes a hinge portion 59 formed by connecting two long plates 53 and 55 via a swing shaft 57 at a side end thereof, and the long plates 53 and 55.
It is composed of the blind portions 61 and 63 attached to the outer side end portions of the. The hinge 59 can be closed up to 90 °. Further, since the rod portions 61 and 63 on both sides are connected so that the rod members 65 forming the cord portions 61 and 63 are swingable with respect to each other, the whole can be opened and closed flexibly.

In the attachment work, first, the photocurable coating sheet 1 having the light shielding layer 25 is attached with the light shielding layer 25 facing upward.
Attach to 51. The adhesive jig 67 is provided in advance with an adhesive layer 67 using a double-sided adhesive tape or the like, and in the photocurable coating sheet 1, the marks 11, 29, 35 provided on the light shielding layer 25 are both long. It is attached so as to match the boundary line 69 between the scale plates 53 and 55. Even if it is transported in this state, the light-shielding layer 25 is present, so that curing is prevented. The adhesive layer 67 may be provided in advance on the sealing layer 7 on the side of the photocurable coating sheet 1 as shown in FIG.

Next, the peripheral portion of the photocurable coating sheet 1 is cut off to form a light shielding layer.
25 and the upper sealing layer 5 are peeled off. Of course, the sealing layer 5 is the light shielding layer
If it also serves as 25, only the sealing layer 5 is peeled off.

Next, the attachment jig 51 on which the photocurable coating sheet 1 is placed is
It is carried to the arm bar as an adherend or the tension bar 13 and placed on the corner 13a such that the boundary line 69 between the long plates 53 and 55 is aligned with the corner 13a. Next, set the angles of the long plates 53, 55 to 90 °.
Close up. As a result, as shown in the sectional view of FIG.
Is attached to the outer surface 71 of the. Further, the blinds 61, 63 are made to extend along the inner edge 73 from the end edge 72 of the arm bar or the tension bar 13. In this way, once the armature and the tension bar 13 are completely covered with the sticking jig 51, and then only the sticking jig 51 is slowly peeled off, the adhesive layer 67 is also peeled off, and The curable sheet 3 and the sealing layer 7 are left. Since the sealing layer 7 is transparent, if it is left as it is, it will cure in response to sunlight. After curing, peeling the sealing layer 7 reveals a smooth surface.

When the sticking work is performed with the jig 51 as described above, the sticking jig is made by the marks 11, 29 and 35 on the photocurable coating sheet 1.
It can be accurately attached to the predetermined place of 51. Therefore, if the sticking jig 51 is accurately pressed against the armrest or the tension bar 13, then the photocurable sheet 3 can be mounted accurately by simply winding the sticking jig 51.

Therefore, even if only the hand is used or the jig 51 is used,
As shown in the figure, the end surface 75 of the photocurable sheet 3 after construction forms a flat surface (here, a flat surface at a right angle) at a desired angle with respect to the longitudinal direction of the arm bar or the tension bar 13. Therefore, as shown in FIG. 17, the photocurable sheet 3 is continuously formed.
Since it can be attached with almost no gap even if attached, the putty of the same composition as the photocurable resin (however, the length of glass fiber is 3
It is possible to completely seal with only a simple coating operation of 10% by weight of ~ 6 mm or 10% by weight of a filler as an alternative), and ground fault etc. can be completely prevented. Highly accurate work can be performed with extremely efficient work.

Although the sealing layer 5 and the light-shielding layer 25 are separate films in the above-mentioned embodiment, they have the property of preventing the components of the photocurable sheet 3 such as styrene monomer from scattering and the light-shielding property with respect to the curing wavelength light. If so, one layer can serve also.

In addition, the sealing layer 5 in the case of the work only with the hand and the sealing layer 7 in the case of the work with the jig 51 are films having releasability such as PVA so that they can be peeled off after the photocurable sheet 3 is cured. However, if other films have a release treatment, the films of other materials can have releasability.

Although the upper sealing layer 5 and the lower sealing layer 7 are separate bodies, as shown in the partially cutaway perspective view of FIG. 18, the sealing layer 79 is made of a cylindrical film having at least a sealing property.
It may be one in which the photocurable sheet 3 is enclosed and each end 81 is closed. Of course, as shown in FIG. 19, using a sealing layer 83 made of a long cylindrical film, it is sealed at a predetermined interval,
You may cut and use them one by one during construction.

Further, the mark may be provided not only by tape but also by printing.

As another application different from the first and second embodiments, it may be used for coating a detention metal fitting portion, for example, a detention clamp 91 as shown in FIG. This retracting clamp 91 is a armor 95 against a utility pole 93, a strap for two tension-resistant joints, and two tension-resistant insulators 99.
And the electric wire 101 is retained on the electric pole 93. When covering the photocurable sheet 3, first, a light shielding layer
The light-curable sheet 3 with the sealing layer 5 having 25 is arranged so that the marks 11, 29 and 35 thereof are directly above the detention clamp 91 and bent at the marks 11, 29 and 35, and the detention clamp 91 is placed. And the electric wire 101 are folded up. Then, the peripheral portion of the photocurable sheet 3 is attached by the adhesive force of the photocurable sheet 3 itself, and then the light shielding layer 25 is peeled off and photocured. After this, the sealing layer 5
Peel off and complete. This photocurable sheet 3 has a mark 1
Accurately attach the peripheral edge with 1,29,35.
Since the resin hardens in a sealed and tight contact with the wire 1 and the electric wire 101, short circuit, ground fault, etc. can be prevented.

Advantageous Effects of Invention The light-curable covering sheet of the present invention is a flexible and shape-retaining light-curable sheet, and a sealing layer having a light-shielding layer and a positioning mark is adhered and fixed to both sides of the light-curable sheet, so Since extremely accurate and quick construction work can be performed even in poor locations, complete insulation can be easily achieved, work efficiency and yield can be improved, and electric accidents due to birds and beasts can be prevented.

[Brief description of drawings]

FIG. 1 is a plan view of the first embodiment of the present invention, FIG. 2 is a partial cross-sectional view thereof, FIG. 3 is an explanatory view of a manual installation work, and FIG. 4 is a sticking of a photocurable coating sheet. Sectional view showing the state,
FIG. 5 is a sectional view of the second embodiment, FIG. 6 is a plan view thereof, FIG. 7 is an explanatory view of exposure of a peripheral portion, FIG. 8 is an explanatory view showing another example of the mark, and FIG. Explanatory diagram when a line is provided,
FIG. 10 is an illustration of another example, FIG. 11 is an illustration of a photocurable coating sheet provided with an adhesive layer, FIG. 12 is a plan view of a sticking jig, and FIG. 13 is a front view thereof. 14 and 15 are explanatory views showing the use state thereof, FIG. 16 is an explanatory view when a photocurable sheet is attached to an adherend, and FIG. 17 is an explanatory view when continuously attached. FIG. 18 is an explanatory view when the upper and lower sealing layers are integrally formed, and FIG. 19 is an explanatory view of the continuous body,
Figure 20 shows an explanatory diagram when applied to a detention clamp. 1 ... Photocurable coating sheet 5,7,79,83 ... Sealing layer 3 ... Photocurable sheet, 11,29,35 ... Mark 25 ... Light-shielding layer

Claims (8)

[Scope of utility model registration request] 1. A light-curable sheet which is flexible and has a shape-retaining property, and both sides of the light-curable sheet are hermetically sealed, and at least one surface side of which has a light-shielding layer against light for curing the curable sheet. A sealing layer and a positioning mark for an adherend or a bonding jig provided on the sealing layer are provided, and the photocurable sheet and the sealing layer are closely fixed by the adhesive force of the photocurable sheet. A sheet for photocurable coating, characterized in that 2. The photocurable coating sheet according to claim 1, wherein the sealing layer is a bag-shaped utility model registration made of a plastic film. 3. The photocurable coating sheet according to claim 1 or 2, wherein the positioning mark is provided on the light-shielding layer side. 4. A utility model registration claim in which the photocurable sheet becomes an electrical insulator at least after curing.
The photocurable coating sheet according to any one of items. 5. The photocurable coating sheet according to claim 1 or 2, wherein the sealing layer and the light-shielding layer are each formed into a film shape. 6. The photocurable coating sheet according to claim 1, wherein the sealing layer is peelable from the photocurable sheet after curing the photocurable sheet. . 7. The photocurable coating sheet according to claim 1, wherein the photocurable sheet contains a photocurable unsaturated polyester and a glass fiber. 8. The photocurable coating sheet according to any one of claims 1 to 7, wherein the sealing layer is a polyvinyl alcohol film.