JP2020007871A - Nozzle for hot wind ejection - Google Patents

Abstract

To provide a nozzle for a hot wind ejection capable of ejecting hot wind with a uniform temperature.SOLUTION: A nozzle for a hot wind ejection 100 has a first cylinder part 31 extending in a first axis O1 direction and in which a first channel P1 is formed, a second cylinder part 32 of which end at upward side is connected to an end at downward side of the first cylindrical part 31 and extending in a second axis O2 direction where at least downward side intersects with the first axis O1 direction and in which a second channel P2 is formed and a flat part 40 of which end at upward side is connected to an end at downward side of the second cylindrical part 32 and extending in a second axis O2 direction and in which a third channel P3 is formed and is characterized in that a width in X direction orthogonal to a plane including the first axis O1 direction and the second axis O2 direction in the third channel P3 is narrower than a width in X direction upward side of the second channel P2 and a connection part P0 of the second channel P2 and the third channel P3 is formed as to extend toward downward side as it extends toward an inside Y1 of a channel P consisting of the first channel P1, the second channel P2 and the third channel P3.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a hot air jet nozzle.

  BACKGROUND ART Conventionally, on a roof of a building or the like, a waterproof sheet is installed on a roof base material, and ends of the waterproof sheet are joined together to ensure waterproofness of the entire roof.

  Adjacent waterproof sheets are arranged with their respective ends vertically overlapped. The upper waterproof sheet is turned up, the hot air jet nozzle attached to the tip of the hot air gun is inserted into the gap between the upper and lower waterproof sheets, and hot air is blown to thermally fuse the upper and lower waterproof sheets (see below). Patent Documents 1, 2, 3).

JP-A-2004-351635 JP 2005-178165 A JP 2008-69625 A

  However, in the hot-air jet nozzles described above, there are many objects having a bent end portion, and the temperature of the hot air blown from the inside of the flow path of the hot air is lower than the temperature of the hot air blown from the outside. As a result, there is a problem that temperature unevenness occurs in the hot air.

  The present invention has been made in view of the above circumstances, and provides a hot-air jet nozzle capable of blowing hot air at a uniform temperature.

In order to achieve the above object, the present invention employs the following means.
That is, the hot-air jet nozzle according to the present invention extends in the first axial direction and has a first cylindrical portion in which a first flow path through which hot air flows is formed, and an upstream end portion of the first cylindrical portion. A second tubular portion connected to the downstream end, at least the downstream side extending in a second axial direction intersecting the first axial direction, and a second flow passage through which the hot air flows is formed, and an upstream side A flat portion having an end portion connected to a downstream end portion of the second cylindrical portion, extending in the second axial direction, and a third flow passage through which the hot air flows is formed. The width of the third flow path in one direction perpendicular to a plane including the first axial direction and the second axial direction is smaller than the width in the one direction on the upstream side of the second flow path. The connection between the passage and the third passage is directed toward the inside of the passage composed of the first passage, the second passage, and the third passage. According, characterized in that it is formed so as to toward the downstream side.

  In the hot-air jet nozzle configured as described above, the extending direction (second axial direction) of at least the downstream side of the second cylindrical portion and the flat portion is in the extending direction of the first cylindrical portion (first axial direction). Intersect. That is, the second tubular portion is arranged to cross the first tubular portion. Since the hot air tends to travel straight after passing through the first flow path, the hot air is biased to the outside of the flow path in the second flow path, causing temperature unevenness outside and inside the flow path. The connection between the second flow path and the third flow path whose widths are narrowed in a direction including the uniaxial direction and the second axial direction) is flattened while hot air deflected to the outside of the flow path is guided inward by the connection portion between the second flow path and the third flow path. Is blown out from the discharge port of the section. Thereby, the temperature unevenness of the hot air to be blown out is suppressed, and the hot air having a uniform temperature is blown. In addition, since the width in one direction is gradually reduced as the second flow path moves toward the downstream side, the flow of hot air from the second flow path to the third flow path is smoothly performed.

  In the hot-air jet nozzle according to the present invention, it is preferable that the second cylindrical portion is formed so that the width in the one direction becomes narrower toward the downstream side.

  In the hot-air jet nozzle configured as described above, the second cylindrical portion is formed so that the width in one direction becomes narrower toward the downstream side. If one direction of the ejection nozzle is directed up and down, it is easy to insert.

  In the hot-air jet nozzle according to the present invention, a downstream end is connected to an upstream end of the first cylindrical portion, and extends in the first axial direction. An insertion portion to be inserted may be provided, and a slit along the first axial direction may be formed at an end on the upstream side of the insertion portion.

  In the hot air jet nozzle configured as described above, a slit is formed at the upstream end of the insertion portion along the first axial direction. Therefore, insert the nozzle mounting part of the hot air gun into the insertion part, and if the insertion part is sufficiently large, tighten the insertion part so that the width of the slit becomes narrow, and attach the nozzle mounting part to the insertion part be able to. When the insertion portion is smaller, the insertion portion can be loosened so that the width of the slit is widened, and the nozzle mounting portion can be attached to the insertion portion.

  Further, the hot-air jet nozzle according to the present invention may include a virtual line parallel to the first axial direction passing through an inner peripheral end located on an inner peripheral side of the flow path among downstream ends of the flat portion. , The shortest length from the upper waterproof sheet to the insertion section is an overlap between the lower waterproof sheet and the upper waterproof sheet in a state where the end of the upper waterproof sheet is overlapped with the end of the lower waterproof sheet. It may be longer than your teens.

  In the hot air jet nozzle configured as described above, the upper and lower waterproof sheet ends are arranged in parallel, and the insertion portion of the hot air jet nozzle is used in parallel with the end of the waterproof sheet. Even if the flat part is inserted until it touches the end of the lower waterproof sheet corresponding to the virtual line, the shortest length from the virtual line to the insertion part is longer than the overlap of the upper and lower waterproof sheets, so fusion When working, the insertion portion does not interfere with the upper waterproof sheet.

  According to the hot air jet nozzle according to the present invention, hot air having a uniform temperature can be jetted.

It is a figure showing composition of a hot air jet nozzle concerning one embodiment of the present invention. FIG. 2 is a diagram illustrating a configuration of a hot-air jet nozzle according to an embodiment of the present invention, as viewed from a direction different from FIG. 1. FIG. 2 is a sectional view taken along line AA of FIG. 1. FIG. 3 is a sectional view taken along line BB of FIG. 2. It is the figure which looked at the use condition of the nozzle for hot air ejection concerning one embodiment of the present invention from the upper part. It is a perspective view of the nozzle for hot air ejection concerning one embodiment of the present invention. It is a front view of the nozzle for hot air ejection concerning one embodiment of the present invention. It is a rear view of the nozzle for hot-air ejection concerning one embodiment of the present invention. It is a left view of the nozzle for hot-air ejection which concerns on one Embodiment of this invention. It is a right side view of the nozzle for hot air jets concerning one embodiment of the present invention. It is a top view of the nozzle for hot air ejection concerning one embodiment of the present invention. It is a bottom view of the nozzle for hot air ejection concerning one embodiment of the present invention. FIG. 10 is a sectional view taken along line CC of FIG. 9.

Hereinafter, a hot-air jet nozzle according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing a configuration of a hot air jet nozzle according to one embodiment of the present invention. FIG. 2 is a diagram illustrating a configuration of a hot-air jet nozzle according to an embodiment of the present invention, and is a diagram viewed from a direction different from FIG. 1 (a direction rotated by 90 degrees around an O1 direction described later).
As shown in FIGS. 1 and 2, the hot air jet nozzle 100 is mounted on a hot air blower (see FIG. 5) such as a hot air gun 110.
The hot-air jet nozzle 100 has an insert (insert) 1 and a nozzle body 3. In the present embodiment, the hot-air jet nozzle 100 is formed of a metal material, and the insert 1 and the nozzle body 3 are joined by welding.

  The nozzle mounting portion 111 of the hot air gun 110 is inserted into the insert 1 (see FIG. 5), and hot air flows from the insert 1 toward the nozzle 3. In the following description, the upstream side in the hot air flow direction may be simply referred to as the upstream side, and the downstream side in the hot air flow direction may be simply referred to as the downstream side.

The insert 1 has a peripheral wall portion 10 and a flange portion 20.
FIG. 3 is a sectional view taken along line AA of FIG. FIG. 4 is a sectional view taken along line BB of FIG.
As shown in FIGS. 3 and 4, the peripheral wall portion 10 has a cylindrical shape. The peripheral wall portion 10 extends in the O1 direction (first axis direction). The upstream end 10a of the peripheral wall 10 is open.

  As shown in FIGS. 1 and 2, the peripheral wall portion 10 is provided with slits 11 and 12 penetrating in the radial direction. The slits 11 and 12 are provided at one location on the peripheral wall portion 10 respectively, but may be provided at a plurality of locations separated in the circumferential direction.

  The slit 11 extends downstream from the end 10a of the peripheral wall 10 along the O1 direction. The slit 12 extends from the downstream end of the slit 11 to both sides in the circumferential direction.

  As shown in FIGS. 3 and 4, the flange portion 20 is provided at a downstream end portion 10 b of the peripheral wall portion 10.

  The flange portion 20 has an annular shape when viewed from the O1 direction. The flange portion 20 is provided on the inner peripheral side of the end 10 b of the insert 1.

  As shown in FIGS. 1 and 2, the nozzle body 3 has a first tubular portion 31, a second tubular portion 32, and a flat portion 40.

  As shown in FIGS. 3 and 4, the first cylindrical portion 31 has a cylindrical shape. The diameter of the first cylindrical portion 31 is smaller than the diameter of the insert 1 (the diameter of the peripheral wall portion 10). A first flow path P1 through which hot air can flow is formed inside the first cylindrical portion 31.

  The first cylindrical portion 31 extends in the O1 direction. The upstream end 31 a of the first cylindrical portion 31 is connected to the radially inner end of the flange portion 20 of the insert 1.

  The second cylindrical portion 32 has a cylindrical shape. The diameter on the upstream side of the second cylindrical portion 32 is substantially the same as the diameter of the first cylindrical portion 31. Inside the second tubular portion 32, a second flow path P2 through which hot air can flow is formed. The second flow path P2 is communicated with the first flow path P1.

  The second cylindrical portion 32 extends in the O2 direction (second axial direction) intersecting with the O1 direction (see FIG. 4, the same applies hereinafter). As shown in FIG. 4, the upstream end 32 a of the second cylindrical portion 32 is connected to the downstream end 31 b of the first cylindrical portion 31. In other words, the second tubular portion 32 is bent and connected to the first tubular portion 31. In the present embodiment, the angle C between the O1 direction and the O2 direction (see FIG. 4) is about 132 degrees. The angle C is preferably at least an obtuse angle, and more preferably 120 to 140 degrees.

  As shown in FIGS. 1 and 4, a direction orthogonal to a plane including the O1 direction and the O2 direction is defined as an X direction (one direction). In other words, the X direction is a direction orthogonal to the O1 direction and the O2 direction. The second cylindrical portion 32 is formed so that the width in the X direction gradually decreases toward the downstream side. As a result, the width of the second flow path P2 in the X direction is also reduced.

  A direction orthogonal to the O2 direction and the X direction is defined as a Y direction. The second cylindrical portion 32 is formed so that the width in the Y direction gradually increases toward the downstream side. Thereby, the width of the second flow path P2 in the Y direction is also increased. In the present embodiment, the region 33 (see FIG. 2) on the downstream side of the second cylindrical portion 32 is formed by being pressed from both sides in the X direction.

  As shown in FIGS. 1 and 2, the flat portion 40 has a flat shape. As shown in FIGS. 3 and 4, a third flow path P3 through which hot air can flow is formed inside the flat portion 40. The third flow path P3 communicates with the second flow path P2.

  The first flow path P1, the second flow path P2, and the third flow path P3 form a flow path P of the hot air jet nozzle 100 as a whole. As shown in FIG. 4, the flow path P is formed to be bent.

  The flat part 40 extends in the O2 direction. As shown in FIG. 4, the upstream end 40 a of the flat portion 40 is connected to the downstream end 32 b of the second cylindrical portion 32.

  As shown in FIGS. 2 and 3, the width of the flat portion 40 in the X direction (see FIG. 1, the same applies hereinafter) is smaller than the width of the second cylindrical portion 32 in the X direction on the upstream side. Accordingly, the width of the third flow path P3 in the X direction is smaller than the width of the second flow path P2 on the upstream side.

  As shown in FIG. 1 and FIG. 2, the flat portion 40 is formed in a flat plate shape and is arranged to be separated in the X direction, and connects the pair of flat plate portions 41 to both ends in the Y direction of the flat plate portion 41. And a connecting wall portion 42.

  As shown in FIGS. 1 and 4, the width in the Y direction is formed at the downstream side of the flat plate portion 41. Thus, the width in the Y direction is also constant downstream of the third flow path P3.

  The downstream end (discharge port) 40b of the flat part 40 is arranged on a plane orthogonal to the O2 direction. When viewed from the direction shown in FIG. 1, the end portion 40b of the flat portion 40 is arranged parallel to the Y direction.

  As shown in FIG. 4, the end 32b of the second cylindrical portion 32 and the end 40a of the flat portion 40 are connected to form a connection portion P0 between the second flow path P2 and the third flow path P3. I have. The connection portion P0 is formed to be inclined from the Y direction. The connection portion P0 is gradually inclined toward the downstream side as it goes toward the inside (bent side, Y1 side) of the flow path P. For example, the angle formed between the connection portion P0 and the O2 direction is 70 degrees.

  The connection portion P0 is formed on the inner peripheral surface of the nozzle body 3. As shown in FIG. 1, on the outer peripheral surface of the nozzle body 3, a crush line P10 at which the extending direction of the outer peripheral surface is switched is formed at a position corresponding to the connection portion P0.

FIG. 5 is a diagram illustrating the use state of the hot air jet nozzle 100 as viewed from above.
As shown in FIG. 5, a hot air gun 110 to which the hot air jet nozzle 100 is mounted has a nozzle mounting portion 111 at the tip. The nozzle mounting portion 111 has a base portion 112 and an ejection portion 113 protruding from the base portion 112 toward the distal end. The ejection part 113 is formed to have a smaller diameter than the base part 112. A step 114 is formed at the boundary between the base 112 and the ejection part 113. Hot air can be ejected from the tip of the ejection section 113.

Next, a method of using the hot air jet nozzle 100 will be described.
As shown in FIG. 5, the waterproof sheets 121 and 122 are arranged on the installation surface such as the roof of the house. In the adjacent waterproof sheets 121 and 122, the ends 121 a and 122 a of the waterproof sheets 121 and 122 are vertically overlapped. To do. The overlap margin L1 is about 40 mm.

  The nozzle mounting portion 111 of the hot air gun 110 is inserted into the insert 1 of the hot air jet nozzle 100. Insert 1 is arranged coaxially with hot air gun 110.

  At this time, when the inner diameter of the insert 1 is sufficiently larger than the outer diameter of the nozzle mounting portion 111, the wall portions 14 (see FIG. 2) on both sides of the slit 11 (see FIG. 2; the same applies hereinafter) of the insert 1. The same shall apply hereinafter.), And the insert 1 is fastened with a tool such as pliers so that the width of the slit 11 is reduced, and the nozzle mounting portion 111 is mounted in the insert 1.

  On the other hand, when the inner diameter of the insert 1 is smaller than the outer diameter of the nozzle mounting portion 111, the walls 14 on both sides of the slit 11 of the insert 1 are circumferentially separated from each other, and the width of the slit 11 is increased. As described above, the insert 1 is loosened with a tool such as pliers, and the nozzle mounting portion 111 is mounted in the insert 1.

  With the hot-air jet nozzle 100 attached to the hot-air gun 110, the slits 11 and 12 (see FIG. 2; the same applies hereinafter) are arranged closer to the hand than the step 114 (downstream in the direction of hot-air flow). ing.

  The end portion 121a of the upper waterproof sheet 121 is turned, and the flat portion 40 of the hot air jet nozzle 100 is inserted between the upper waterproof sheet 121 and the lower waterproof sheet 122 (overlapping margin).

  At this time, the plate surface of the flat plate portion 41 of the flat portion 40 is oriented vertically, and the discharge port 40b is oriented toward the upper waterproof sheet 121 in the direction adjacent to the waterproof sheets 121 and 122.

  The second tubular portion 32 is formed so that the width in the X direction (the vertical direction when inserted between the waterproof sheets 121 and 122) gradually decreases toward the downstream side. Easy to insert between 122.

  When using the hot-air gun 110, the hot-air gun 110 is inclined upward toward the hand side. Further, the hot air gun 110 is arranged so as to be separated from the upper waterproof sheet 121 toward the hand side.

  Then, the hot air gun 110 is operated, and hot air spouting from the discharge port 40b is blown to the overlapping margin of the upper and lower waterproof sheets 121 and 122 to fuse them together. At this time, since the hot air tends to go straight after passing through the first flow path P1, the hot air is biased to the outside of the flow path P in the second flow path P2, and temperature unevenness occurs outside and inside the flow path P. However, the hot air deflected to the outside of the flow path P is blown out from the discharge port 40b of the flat portion 40 while being guided inward by the connection portion P0 having the narrowed width in the X direction. Thereby, the unevenness of the temperature of the hot air to be blown out is suppressed, and the hot air having a uniform temperature (about 600 degrees) is blown to the overlapping margin of the waterproof sheets 121 and 122. Also, since the width in the X direction is gradually reduced as the second flow path P2 moves toward the downstream side, the flow of hot air from the second flow path P2 to the third flow path P3 is made smooth. You.

  In the hot-air jet nozzle 100 configured as described above, the extending direction (O2 direction) of the second cylindrical portion 32 and the flat portion 40 intersects with the extending direction of the first cylindrical portion 31 (O1 direction). . That is, the second tubular portion 32 is arranged to cross the first tubular portion 31. Since the hot air tends to go straight even after passing through the first flow path P1, in the second flow path P2, it is biased to the outside of the flow path P, and the temperature unevenness occurs outside and inside the flow path P, The hot air deflected to the outside of the flow path P is blown out from the discharge port 40b of the flat part 40 while being guided inward by the connection part P0 having the narrowed width in the X direction. Thereby, the temperature unevenness of the hot air to be blown out is suppressed, and the hot air having a uniform temperature (about 600 degrees) is blown. Also, since the width in the X direction is gradually reduced as the second flow path P2 moves toward the downstream side, the flow of hot air from the second flow path P2 to the third flow path P3 is made smooth. You. Therefore, the waterproof sheets 121 and 122 can be reliably welded to each other regardless of the skill of the installer.

  Further, since the second cylindrical portion 32 is formed so that the width in the X direction becomes narrower toward the downstream side, when the second cylindrical portion 32 is inserted between the upper and lower waterproof sheets 121 and 122, the X of the hot air jet nozzle 100 is If you turn it up and down, it's easy to insert.

In addition, a slit 11 is formed at the upstream end 10a of the insert 1 along the O1 direction. Therefore, when the nozzle mounting portion 111 of the hot air gun 110 is inserted into the insert 1 and the insert 1 is sufficiently large, the insert 1 is tightened so that the width of the slit 11 is reduced, and the insert 1 is tightened. No. 1 can be attached with the nozzle mounting portion 111. Further, when the insert 1 is smaller, the insert 1 can be loosened so that the width of the slit 11 becomes wider, and the nozzle mounting portion 111 can be attached to the insert 1.
Further, when the width of the slit 11 is reduced or increased, the slits 12 are provided continuously at the downstream end of the slit 11, so that the wall portions 14 on both sides of the slit 11 are deformed. Easy to adjust and easy to adjust.

  Further, for example, it is assumed that the hot air gun 110 is used in parallel with the ends 121a and 122a of the waterproof sheets 121 and 122, with the virtual line A1 shown in FIG. The shortest length L2 from the imaginary line A2 parallel to the O1 direction (see FIG. 1) to the insert 1 through the inner peripheral end 40c located on the inner peripheral side of the flow path P among the ends 40b of the flat portion 40. Is longer than the overlap margin L1 of the upper and lower waterproof sheets 121 and 122. Therefore, even if the flat part 40 is inserted until it comes into contact with the end 122a of the lower waterproof sheet 122 corresponding to the imaginary line A2, the shortest length L2 from the imaginary line A2 to the insert 1 is larger than the overlap margin L1. Since it is long, the insert 1 does not interfere with the upper waterproof sheet 121 during the fusion work.

  With the hot-air jet nozzle 100 attached to the hot-air gun 110, the slits 11 and 12 are arranged closer to the hand than the step 114 (downstream in the direction of hot-air flow). Therefore, even if the hot air ejected from the tip of the ejection portion 113 stays inside the insert 1, it does not leak outward from the slits 11 and 12.

  The various shapes, combinations, and the like of the constituent members shown in the above-described embodiments are merely examples, and can be variously changed based on design requirements and the like without departing from the gist of the present invention.

  For example, in the embodiment described above, the second cylindrical portion 32 is formed so that the width in the X direction gradually decreases toward the downstream side, but the present invention is not limited to this. In consideration of the efficient flow, it is preferable that the configuration is as described above. However, the width is not gradually reduced, and the width in the X direction is reduced at the end 32b of the second cylindrical portion 32. Is also good.

  The slits 11 and 12 are provided in the peripheral wall portion 10 of the insert 1, but the present invention is not limited to this. The slits 11 and 12 may not be provided in the insert 1, and the insert 1 may be mounted on the nozzle mounting portion 111 of the hot air gun 110 by another fixing means such as a screw.

  Further, in the embodiment described above, the first tubular portion 31 and the second tubular portion 32 are connected to bend, but the present invention is not limited to this. The second cylindrical portion only needs to extend at least on the downstream side in the second axial direction intersecting with the first axial direction. Therefore, the first tubular portion and the second tubular portion may be connected so as to be curved, and the downstream side of the second tubular portion may extend along the second axial direction.

1. Insert (insertion part)
DESCRIPTION OF SYMBOLS 3 ... Nozzle body 10 ... Peripheral wall parts 11 and 12 ... Slit 20 ... Flange part 31 ... First cylinder part 32 ... Second cylinder part 40 ... Flat part 41 ... Flat plate part 100 ... Hot air jet nozzle 110 ... Hot air gun 111 ... Nozzle Attachments 121, 122 Waterproof sheet A2 Virtual line L1 Overlapping margin P Flow path P0 Connection section P1 First flow path P2 Second flow path P3 Third flow path

Claims (4)

A first cylindrical portion that extends in the first axis direction and has a first flow passage through which hot air flows is formed,
An upstream end is connected to a downstream end of the first cylindrical portion, and at least a downstream side extends in a second axial direction intersecting the first axial direction, and a second flow path through which the hot air flows is provided inside. A second cylindrical portion formed in
A flat portion in which an upstream end is connected to a downstream end of the second cylindrical portion, extends in the second axial direction, and a third flow passage through which the hot air flows is formed. ,
The width of the third flow path in one direction orthogonal to the plane including the first axis direction and the second axis direction is smaller than the width in the one direction on the upstream side of the second flow path,
The connecting portion between the second flow path and the third flow path is directed toward the downstream side as going toward the inside of the flow path including the first flow path, the second flow path, and the third flow path. A hot-air jet nozzle characterized by being formed.   2. The hot-air jet nozzle according to claim 1, wherein the second cylindrical portion is formed so that the width in the one direction becomes narrower toward the downstream side. 3. A downstream end is connected to an upstream end of the first cylindrical portion, extends in the first axial direction, and has an insertion portion into which a nozzle mounting portion of a hot air gun is inserted,
The hot-air jet nozzle according to claim 1, wherein a slit along the first axis direction is formed at an upstream end of the insertion portion. From the imaginary line parallel to the first axial direction through the inner peripheral end located on the inner peripheral side of the flow path among the downstream ends of the flat portion, the shortest length to the insertion portion is
4. An overlap between the lower waterproof sheet and the upper waterproof sheet in a state in which an end of the upper waterproof sheet is overlapped with an end of the lower waterproof sheet. The hot-air jet nozzle according to item 1.

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