JP4391220B2 - Hot air blowing nozzle and hot air fusion method for waterproof sheet - Google Patents

Description

  In the present invention, a pair of waterproof sheets are arranged in a state where the edges of the waterproof sheets overlap each other on the waterproof base, and hot air is blown between the surfaces to be fused of both waterproof sheets in a state where the edges of the waterproof sheets that overlap are sandwiched. The present invention relates to thermal fusion of a waterproof sheet that is melted by spraying and the two waterproof sheets are overlapped and fused.

  Conventionally, as a heat-sealing of this type of waterproof sheet, for example, a first waterproof sheet 12A of a pair of waterproof sheets 12 as shown in FIG. The second waterproof sheet 12B is arranged so that the edge thereof overlaps the edge of the first waterproof sheet 12A, and the edge of the second waterproof sheet 12B is lifted up in this state. By blowing hot air using a hot air fusion machine 20 over the overlapping surface and melting it, the second waterproof sheet 12B is stacked on the first waterproof sheet 12A and pressed by the pressing jig 21 in that state. The method of fusing was adopted.

As shown in FIG. 6, the hot-air fusion machine 20 includes a hot-air generator 22, a cylindrical portion 23 that is flatly deformed and extended from the hot-air generator 22, and a hot-air blowing nozzle 24 attached to the tip of the cylindrical portion 23. Consists of.
Further, as shown in FIG. 7, the hot air blowing nozzle 24 is provided with openings 24a and 24b for blowing hot air in the backward direction and the two directions of the joining surface with respect to the direction of fusion work, and the hot air is blown from these openings. It is known (see, for example, Patent Document 1).
Japanese Patent No. 3064264

However, according to the hot air fusion machine shown in FIG. 6, since the hot air is blown out from one direction and directly heated, it may not be possible to heat the entire fusion surface uniformly. There was a problem that it took time.
Further, according to the hot air fusion machine shown in FIG. 7, in order to melt the waterproof sheet 12, the hot air is blown out in two directions of the opening 24a in the rear direction and the opening 24b in the joint surface with respect to the progressing direction of the fusion work. Has a problem that a large amount of hot air is required, heat loss is large and efficiency is low.

As described above, the conventional hot air fusion machine has the problems that it takes time for the fusion work and the quality of the joint is likely to vary.
The present invention was made in order to solve such a conventional problem, and the object of the present invention is to provide a hot air blowing nozzle and a waterproof sheet that can reliably and efficiently join waterproof sheets with the minimum necessary hot air. The object is to provide a hot air fusion machine and a fusion method.

The invention which concerns on Claim 1 arrange | positions a pair of waterproof sheet in the state which the edge part mutually overlaps on the waterproof base | substrate, and in the state which pinched | overlaid the waterproof sheet which overlaps, between the fusion | bonding object surfaces of both waterproof sheets A hot-air blowing nozzle used for hot-air fusion of a waterproof sheet that is melted by blowing hot air, and the two waterproof sheets are superposed and fused, with openings on the upper and lower surfaces, and in front of the direction of fusion work An opening connected in three directions extending in the direction, the rear direction, and the joint surface is provided, and is configured to blow hot air over the entire area between the fusion target surfaces of the two waterproof sheets to be melted by blowing the hot air, The size of the provided opening is 2 to 10% with respect to the width of the hot air blowing nozzle, and the opening located in the forward direction and the backward direction with respect to the progressing direction of the fusion work is relative to the opening located in the joint surface. Angle θ is 90-130 ° And the length of the opening located in the front direction and the rear direction is 10 to 20% of the opening located in the joint surface.

The invention according to claim 2, a pair of waterproof sheet, placed in a state in which another edge on the waterproof underlayer overlap, in a state of flipping through the waterproof sheet overlying, place the hot Izuru Fubuki the nozzle of claim 1, wherein Then, hot air is blown from the openings on the upper and lower surfaces of the hot air blowing nozzle and the openings connected in the three directions extending in the forward direction, the backward direction and the joining surface with respect to the progressing direction of the fusion work, and the two waterproof sheets are fused. The entire area of the target surfaces is melted, and the two waterproof sheets are overlapped and fused.

  According to the present invention, waterproof sheets can be bonded to each other reliably and efficiently with a minimum amount of hot air.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 show a hot air blowing nozzle 1 according to an embodiment of the present invention (corresponding to claims 1 and 2 ).
The hot air blowing nozzle 1 according to the present embodiment is provided with a plurality of openings 3a and 4a at regular intervals on the upper and lower surfaces 3 and 4 of the nozzle body 2 which is flat and expands toward the tip, and the fusion work proceeds. This is different from the conventional hot air blowing nozzle 24 in that it is configured to provide an opening 5 connected in three directions extending in the forward direction, the backward direction, and the joint surface with respect to the direction, and to blow hot air over the entire melting range.

In addition, the hot air blowing nozzle 1 which concerns on this embodiment is attached to the front-end | tip of the cylinder part 23 similarly to the hot air fusion machine 20 of the conventional waterproof sheet shown in FIG. Therefore, also in this embodiment, a case where the present invention is applied to a conventional waterproof sheet hot-air fusion machine 20 will be described. Accordingly, the hot air fusion machine will be described as the hot air fusion machine 20 without a new reference numeral.
In the present embodiment, the openings 3a and 4a provided on the upper and lower surfaces 3 and 4 are arranged in a matrix, and the size is 2 to 10%, preferably 5% with respect to the nozzle width (width of the bonding surface opening 5a). It has become.

Further, the opening 5 connected in the three directions extending in the forward direction, the rearward direction, and the joining surface with respect to the progressing direction of the fusion work cuts out a predetermined portion at the tip of the hot air blowing nozzle 1 and is joined to the joint face opening 5a. It is formed so as to be connected in three directions extending from the front opening 5b and the rear opening 5c.
And the front direction opening 5b and the back direction opening 5c are notched and formed so that angle (theta) with respect to the joint surface opening 5a may be 90-130 degrees, Preferably it is 110 degrees. The length of the front opening 5b and the rear opening 5c is 10 to 20%, preferably 20%, of the joint surface opening 5a.

Next, the effect | action of the hot air blowing nozzle 1 which concerns on this embodiment comprised in this way is demonstrated based on FIGS. 1-3.
3, the hot Izuru Fubuki nozzle 1 according to the present embodiment shows a hot air fusion construction method waterproof sheet used (corresponding to claim 2).
In FIG. 3, an insulating sheet 13 is first laid on a general base 10 such as concrete. Then, along the lower edge of the rising portion 11A, the resin-coated plate steel plate 14A and the disk steel plate 15 fixed with anchors are installed, and the first waterproof sheet 12A is overlaid thereon. Then, the overlapping portion between the edge portion of the first waterproof sheet 12 </ b> A and the resin-coated plate steel plate 14 </ b> A is heated and fused using the hot air fusion machine 20. This fused part is indicated by a hatched area P.

  Next, on the other edge of the first waterproof sheet 12A, the second waterproof sheet 12B is disposed so that the edge overlaps the edge of the first waterproof sheet 12A, and the overlapping surface of the two waterproof sheets Are heated and fused in the same manner using the hot air fusion machine 20. This fused part is indicated by a hatched area Q. Further, the resin-coated plate steel plate 14B is installed on the upper surface of the base rising portion 11A and fixed with an anchor, and the edge portion of the third waterproof sheet 12C cut to a certain size is fused thereto. This fused part is indicated by a hatched area R. Then, the other edge portion of the third waterproof sheet 12C is fused to the edge portion of the first waterproof sheet 12A that is fixed first. This fused part is indicated by a hatched area S.

Next, the electromagnetic induction heater 21 is applied from above the waterproof sheet 12 to the position where the disk steel plate 15 is disposed, and heated by energization to be melted into the first waterproof sheet 12A and the second waterproof sheet 12B. To wear.
Finally, the resin molding material 16 is installed at the entrance / exit corner, and is heated and fused using the hot air fusion machine 20.

Thus, according to the construction method shown in FIG. 3, the waterproof sheet 12 can be joined very easily and without any gaps.
In this construction method, as described above, hot air heating is required for the fusion of the waterproof sheets 12, the fusion of the waterproof sheet 12 and the resin-coated steel plate 14, and the fusion of the waterproof sheet 12 and the resin molding material 16. It is. For this purpose, the conventionally known hot-air fusion machines have a problem that it takes a long time for the fusion work and also causes variations in the quality of the joints, resulting in easy leakage.

  On the other hand, according to the hot air fusion machine 20 for the waterproof sheet according to the present embodiment, as shown in FIG. 2, the openings 3a and 4a of the upper and lower surfaces 3 and 4 of the hot air blowing nozzle 1 and the direction in which the fusion work proceeds. Hot air blows out from the opening 5 connected to the three directions spanning the front opening 5b, the rear opening 5c, and the joint surface 5a, and the openings 3a and 4a of the upper and lower surfaces 2 and 3 pass the waterproof sheet 12 immediately before the fusion. The direction opening 5b can heat the edge of the waterproof sheet 12B, and the rear direction opening 5c can heat the rear of the fusion part, and the waterproof sheet 12B edge and the fusion part, which are likely to cause poor quality, are efficiently heated over a wide area. It is possible to realize a fusion work with high quality and good workability.

  In the present embodiment, the size of the upper and lower surfaces 3a, 4a is outside the range of 2 to 10% with respect to the nozzle width (width of the bonding surface opening 5a), and the front opening 5b and the rear with respect to the fusion work direction. When the direction opening 5c is outside the range of the angle θ with respect to the bonding surface opening 5a of 90 to 130 °, and the lengths of the front opening 5b and the rear opening 5c are outside the range of 10 to 20% of the bonding surface opening 5a, In each of these cases, it was confirmed that the thermal efficiency was poor and the bonding quality could not be ensured.

The hot air fusion machine 20 has been described as a manual type as shown in FIGS. 3 and 6, but the hot air fusion machine 20 may be attached to a self-propelled gantry to perform the work.
Moreover, it is suitable for the hot-air melter 20 to set the blowing temperature to 400 to 650 ° C. and the self-propelling type to 350 to 600 ° C. with a manual type. Further, it is preferable that the fusing speed is manually set to 0.3 to 2.0 m / min, and the self-running type is set to 0.8 to 5.0 m / min.

  Moreover, although the said embodiment demonstrated the case where all formed the opening 5 connected in three directions over a front direction, a back direction, and a joining surface with respect to the advancing direction of a fusion | fusion process, FIG. As shown, it may have an arc shape.

Next, the effects of the invention will be verified based on examples.
Under the joining conditions of the waterproof sheet (thickness 1.0 mm) shown in FIG. 3, the waterproof sheet was actually joined. The hot air fusion machine 20 was provided with the hot air blowing nozzle 1 shown in FIG. The fusing conditions were a hot air blowing temperature of 500 ° C. and a fusing speed of 2.0 m / min.
Moreover, joining of the waterproof sheet was performed on the same conditions as an Example using the hot air melt | fusion machine 20 provided with the hot air blowing nozzle 14 shown in FIG. 7 as a comparative example.

Next, the performance evaluation test of the joined waterproof sheet was performed.
The evaluation method conforms to the standard of JIS A 6008 (synthetic polymer roofing sheet), and a strip sheet having a width of 100 mm is joined as a sample so that the overlap is 40 mm, and a tensile load (300 mm / min) is applied to break. The load to be measured was determined.
The results are shown in Table 1.

  In the standard of JIS A 6008, a bonding strength of 61.2 kgf or more is required at room temperature.

It is a top view which shows the hot air blowing nozzle which concerns on one Embodiment of this invention. It is a perspective view which shows the application condition of the hot air blowing nozzle which concerns on one Embodiment of this invention. It is a perspective view which shows the waterproofing construction method using the hot-air melter concerning this embodiment. It is a top view which shows the hot air blowing nozzle which concerns on another embodiment of this invention. It is a perspective view which shows the joining condition of the conventional waterproof sheet. It is a perspective view which shows the conventional hot air fusion machine. It is a perspective view which shows the hot air blowing nozzle of the conventional hot air melter.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hot air blowing nozzle 3, 4 Upper and lower surfaces 3a, 4a of hot air blowing nozzle Opening 5 provided in upper and lower surfaces 3, 4 of hot air blowing nozzle Opening 5a Joint surface opening 5b Forward opening 5c Backward opening 12 A pair of waterproof sheets 12A 1 waterproof sheet 12B 2nd waterproof sheet 20 hot air fusion machine

Claims (2)

Place a pair of waterproof sheets in a state where the edges overlap each other on the waterproof base, and with the waterproof sheets overlaid on top of each other, blow hot air between the surfaces to be fused of both waterproof sheets to melt both A hot air blowing nozzle used for hot air fusion of a waterproof sheet that is laminated and fused with a waterproof sheet,
An opening is provided on the upper and lower surfaces, and an opening is provided in three directions extending in the forward direction, the rear direction, and the joining surface with respect to the direction in which the fusion work proceeds, and the two waterproof sheets are melted by blowing the hot air. It is configured to blow hot air across the entire area to be worn ,
The size of the opening provided on the upper and lower surfaces is 2 to 10% with respect to the width of the hot air blowing nozzle,
The openings positioned in the front direction and the rear direction with respect to the traveling direction of the fusion work are inclined so that an angle θ with respect to the opening positioned in the joint surface is 90 to 130 °, and the front direction The length of the opening located in the rear direction is 10 to 20% of the opening located in the joint surface. A pair of waterproof sheets are arranged in a state where their edges overlap each other on a waterproof base, and the hot air blowing nozzle according to claim 1 is arranged in a state where the overlying waterproof sheet is rolled up, and above the hot air blowing nozzle Hot air is blown out from the opening on the lower surface and the opening connected in three directions, the front direction, the rear direction, and the joining surface with respect to the progressing direction of the fusion work, and the entire area of the fusion target surfaces of the both waterproof sheets is melted. The heat-sealing method, wherein the two waterproof sheets are overlapped and fused.

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