JP3121379U - Adapter for hot-air jet type heating device and nozzle holder holding structure of the device - Google Patents

Abstract

An adapter for a hot-air jet type heating device that can easily attach and detach a nozzle holder to and from a pipe tip while having a simple structure, and a nozzle holder holding structure for the device are provided.
In a hot-air jet type heating device that blows hot air from the tip of a nozzle to heat solder or the like, a nozzle, a substantially cylindrical nozzle holder body that holds the nozzle, and a radial direction from the nozzle holder body. An adapter 10 for detachably mounting a nozzle holder 2 having a protruding portion 3 protruding outward to a substantially cylindrical pipe tip 50, and adapter fixing means 14 for fixing the adapter 10 to the pipe tip 50. An axial direction that restricts the movement of the protruding portion 3 toward the axial drop-off side when the circumferential position of the protruding portion 3 is within a specific angular range in a state where the nozzle holder 2 is inserted into the pipe tip 50. The movement restricting portion 13 is provided, and a fixed portion 13b for fixing the protruding portion 3 is provided at a specific position in the axial direction movement restricting portion 13.
[Selection] Figure 1

Description

  The present invention relates to an adapter for holding a nozzle holder used in a hot-air jet type heating device that is used for mounting and removing various surface-mounted components and jets hot air from a nozzle tip to heat solder and the like. Moreover, it is related with the nozzle holder holding structure of the apparatus.

  In general, a hot air jet type heating device (also referred to as a hot air jet type heating device, also abbreviated as hot air) is used with a nozzle holder equipped with a nozzle (hot air jet port) attached to a pipe tip. This nozzle holder is detachable, and is used by appropriately replacing the nozzle holder provided with nozzles of various shapes according to the application.

  FIG. 5 is a perspective view showing a mounting state of a conventional general nozzle holder 2. The nozzle holder 2 includes a nozzle 1 serving as a hot air outlet on the tip side of a substantially bottomed cylindrical nozzle holder body 6. A slit-like notch 8 is provided in the circumferential direction substantially semicircularly near the axial base end side of the nozzle holder body 6. A clamp 3 (protruding portion) for fixing the nozzle holder 2 to the pipe distal end portion 50 is provided on the proximal end side with respect to the notch 8. The portion of the nozzle holder body 6 where the clamp 3 is provided can be expanded and contracted relatively easily by the notch 8. The clamp 3 is provided with a screw 4 for tightening or loosening it.

  If an operator inserts the inner diameter portion 7 on the proximal end side of the nozzle holder body 6 into the pipe distal end portion 50 and then tightens the screw 4 of the clamp 3, the proximal end side of the nozzle holder body 6 is reduced in diameter, and the nozzle holder 2 is fixed to the pipe tip 50. If the operator loosens the screw 4, the diameter of the proximal end of the nozzle holder main body 6 is increased, and the nozzle holder 2 can be removed from the pipe distal end portion 50.

  However, with this structure, the operator must loosen or tighten the screw 4 using a screwdriver each time the nozzle 1 (nozzle holder 2) is replaced. In particular, when it is necessary to replace the nozzle 1 relatively frequently, the operation is troublesome and the work efficiency is lowered.

For such a problem, Patent Document 1 discloses a structure including an attachment that allows the nozzle holder 2 to be replaced relatively easily and can also easily adjust the angular position of the nozzle 1 around the hot air ejection axis. It is shown.
JP 2002-353611 A

  However, the structure provided with the attachment is a relatively complicated structure that requires a locking pin, a spring, and the like, and a simpler structure has been desired. In particular, when the angular position adjustment around the hot air jet axis of the nozzle 1 is not so important, there has been a strong demand for reducing the cost by simplifying the structure rather than such a function.

  In view of such circumstances, an object of the present invention is to provide a hot-air jet type heating device adapter and a nozzle holder holding structure for the device that can easily attach and detach the nozzle holder to and from a pipe tip while having a simple structure. And

  The invention of claim 1 is a hot-air jet type heating device that jets hot air from the tip of a nozzle to heat solder or the like, from the nozzle, a substantially cylindrical nozzle holder main body that holds the nozzle, and the nozzle holder main body. An adapter for a hot-air jet type heating device in which a nozzle holder having a projecting portion projecting radially outward is removably attached to a substantially cylindrical pipe tip, and the adapter is fixed to the pipe tip. When the circumferential direction position of the protruding portion is within a specific angular range with the fixing means and the nozzle holder being inserted into the tip of the pipe, the movement of the protruding portion to the axial drop-off side is limited. And a fixing portion for fixing the protruding portion at the site is provided at a specific position in the axial movement limiting portion.

  The invention of claim 2 is the adapter for a hot-air jet type heating device according to claim 1, wherein the axial movement restricting portion has a contact surface facing the tip end side in the axial direction of the protruding portion. The clearance between the protruding portion and the contact surface is gradually reduced to one direction according to the angular position of the protruding portion while being in the axial movement limiting portion. The portion corresponding to the position where the gap disappears is the fixed portion.

  According to a third aspect of the present invention, in the adapter for a hot air jet type heating device according to the second aspect, the contact surface is a slope inclined in a spiral shape.

  The invention of claim 4 is a nozzle holder holding structure of a hot-air jet type heating device in which the nozzle holder according to claim 1 is detachably attached to the tip of a substantially cylindrical pipe, and the nozzle holder alone is the above-mentioned nozzle holder. It has a nozzle holder independent fixing means that can be fixed to the pipe tip, and the nozzle holder is attached to the pipe tip via the hot-air jet type heating device adapter according to any one of claims 1 to 3. And a state in which the nozzle holder is fixed to the pipe tip by the nozzle holder single fixing means.

  The invention of claim 5 is the nozzle holder holding structure of the hot-air jet type heating device according to claim 4, wherein the protruding portion of the nozzle holder is a part of the nozzle holder single fixing means.

  According to the first aspect of the invention, the nozzle holder can be easily attached to and detached from the distal end of the pipe while being an adapter having a simple structure as described below.

  According to the structure of the present invention, the adapter is first fixed in advance to the pipe tip, and the nozzle holder can be easily attached and detached using this adapter. That is, first, the protrusion is aligned with a portion other than the axial movement restricting portion, the nozzle holder is fitted into the pipe tip, and then the nozzle holder is rotated in the circumferential direction so that the protruding portion is aligned with the fixed portion of the axial movement restricting portion. Thus, the nozzle holder can be easily attached to the pipe tip without complicated work such as screw tightening. The removal of the nozzle holder can be easily performed by the reverse operation.

  According to the second and third aspects of the invention, the fixing portion can be reliably provided with a simple structure.

  According to the invention of claim 4, the degree of freedom of the method of attaching the nozzle holder can be increased. In addition, when the user already has a wide variety of nozzle holders, the user can obtain a single adapter, and use all existing nozzle holders as they are to improve remarkably improved workability. be able to. In other words, a significant cost-effectiveness can be obtained.

  According to the invention of claim 5, the nozzle holder can be diverted by using the single fixing means of the nozzle holder as the protruding portion.

  An embodiment according to the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view showing a mounted state of the adapter 10 according to the first embodiment of the present invention. 2A is an exploded perspective view of the adapter 10 and the nozzle holder 2, and FIG. 2B is a perspective view showing an intermediate state when the nozzle holder 2 is mounted on the pipe tip 50 using the adapter 10. FIG. . FIG. 3 is a longitudinal sectional view showing a use state where the adapter 10 and the nozzle holder 2 are used.

  In the drawings referred to in the following description, the same members as those in the conventional structure shown in FIG. 5 described above are denoted by the same reference numerals, and redundant description thereof is omitted.

  The adapter 10 is a member made of a heat resistant material such as metal. The adapter 10 has a substantially two-stage cylindrical structure including an adapter proximal end side 11 and an adapter distal end side 12. The inner diameter of the adapter proximal end 11 is substantially equal to the outer diameter of the pipe distal end portion 50, and that portion serves as an attachment hole 11b (shown in FIG. 2A) for attaching the adapter 10 to the pipe distal end portion 50. Yes.

  The adapter base end side 11 is partially cut away in the circumferential direction, and a clamp portion 14 (adapter fixing means) is formed at that portion. A screw hole 16 is formed in the clamp portion 14 in a direction substantially parallel to the tangent line, and a screw 15 that is screwed into the screw hole 16 is provided. The adapter base end side 11 is configured such that the diameter thereof is relatively easily enlarged and reduced by the notch of the clamp portion 14. Therefore, when the screw 15 is tightened, the diameter of the mounting hole 11b is reduced, and when the screw 15 is loosened, the diameter of the mounting hole 11b is increased.

  The adapter distal end 12 is a substantially cylindrical member whose inner diameter is larger than the outer diameter of the nozzle holder body 6 and smaller than the maximum outer diameter portion of the clamp 3, and is formed integrally with the adapter proximal end 11. . The adapter distal end side 12 is provided with a notch 17 penetrating the inner and outer diameters in the circumferential direction of about 円 circumference. The notch 17 penetrates from the boundary with the adapter proximal end 11 to the distal end side of the adapter distal end side 12 in the axial direction over about 1/3 of the circumferential direction (opening of the adapter distal end side 12). Hereinafter referred to as an opening 17a). The circumferential length of the opening 17 a is longer than the circumferential length of the clamp 3. Except for the portion of the notch 17 corresponding to the opening 17a, the notch 17 is closed in the axial direction by a portion having a thin thickness in the axial direction (this portion is hereinafter referred to as the axial movement restricting portion 13).

  The axial movement restricting portion 13 is in a mounted state of the nozzle holder 2, that is, the nozzle holder 2 is inserted into the pipe tip 50 and the circumferential position of the clamp 3 is within an angular range corresponding to the axial movement restricting portion 13. In this state, the movement of the clamp 3 toward the axially falling side is limited.

  A surface forming the notch 17 of the axial direction movement restricting portion 13 (hereinafter, this surface is referred to as a distal end side contact surface 13a) is a spiral inclined surface (see FIG. 3). The inclined surface is formed in a direction in which the axial length of the notch 17 is long on the side close to the opening 17a and the axial length of the notch 17 is shortened as the distance from the opening 17a increases. Further, the maximum axial length of the notch 17 corresponding to the distal contact surface 13 a is longer than the axial length of the clamp 3, and the minimum axial length of the notch 17 is shorter than the axial length of the clamp 3. A tip side contact surface 13a is formed on the front side.

  In addition, the surface which forms the notch 17 of the adapter proximal end 11, that is, the surface facing the distal contact surface 13a is hereinafter referred to as a proximal contact surface 11a.

  Next, the operation of the hot air jet type heating device including the method for attaching and detaching the adapter 10 and the nozzle holder 2 will be described.

  First, the operator attaches the adapter 10 to the pipe tip 50 in advance and fixes it. That is, the screw 15 is loosened to enlarge the diameter of the attachment hole 11 b, and the adapter proximal end 11 is fitted into the pipe distal end portion 50. As shown in FIG. 3, the insertion depth is such a depth that the tip of the pipe tip 50 is positioned at least on the tip side of the notch 8 of the nozzle holder 2 with the nozzle holder 2 attached. In addition, when the nozzle holder 2 is inserted into the pipe distal end portion 50, the depth is such that the base end side end surface of the nozzle holder main body 6 can be inserted to a position where it comes into contact with the base end side contact surface 11a. The operator inserts the adapter 10 into the pipe tip 50 to such a depth, and then tightens the screw 15 to reduce the diameter of the mounting hole 11b, thereby fixing the adapter 10 to the pipe tip 50.

  Next, the operator appropriately selects the nozzle holder 2 having the nozzle 1 suitable for the work content, and attaches the nozzle holder 2 to the pipe tip 50 via the adapter 10. The screw 4 of the nozzle holder 2 is loosened in advance, and the diameter of the proximal end side of the nozzle holder body 6 is increased.

  The operator inserts the nozzle holder body 6 into the pipe tip 50 while matching the position of the clamp 3 protruding from the nozzle holder body 6 with the opening 17 a of the adapter 10. The operator inserts the nozzle holder body 6 up to a depth at which the proximal end surface of the nozzle holder body 6 is in contact with the proximal contact surface 11a, that is, the state shown in FIG. At this time, since the diameter of the proximal end of the nozzle holder body 6 is enlarged, the operator can easily insert the nozzle holder body 6 into the pipe distal end portion 50 without applying pressure.

  2A, the base end surface of the nozzle holder body 6 and the clamp base end surface 3a of the clamp 3 are the same surface. Therefore, in the insertion state shown in FIG. 2B, the clamp base end surface 3a is also in contact with the base end side contact surface 11a.

  Next, the operator rotates the nozzle holder body 6 in the circumferential direction indicated by the arrow A1 in FIG. 2B, that is, in the circumferential direction so that the clamp 3 is directed toward the axial movement restricting portion 13. When the clamp 3 is rotated to a position corresponding to the distal end side contact surface 13a, there is a gap between the clamp distal end surface 3b and the distal end side contact surface 13a when the rotation angle is relatively small. Since the front end side contact surface 13a is a spiral slope, the gap gradually decreases as the rotation angle of the nozzle holder body 6 is increased, and finally the gap disappears. That is, the clamp front end surface 3b is in contact with the front end side contact surface 13a (state shown in FIG. 3).

  When the operator further slightly rotates the nozzle holder body 6 in the arrow A1 direction from the state in which the clamp front end surface 3b is in contact with the front end side contact surface 13a, the axial direction movement restricting portion 13 is slightly elastically deformed. A frictional force acts between the clamp tip surface 3b and the tip contact surface 13a by the restoring force. With this frictional force, the clamp 3 is sandwiched between the proximal contact surface 11 a and the distal contact surface 13 a, and the nozzle holder 2 is held by the adapter 10. FIG. 1 shows this mounting completion state. At this time, a portion on the distal end side contact surface 13a where the distal end surface 3b of the clamp is in contact with the distal end side contact surface 13a serves as the fixed portion 13b.

  When the mounting of the nozzle holder 2 is completed in this way, the operator operates a controller or the like (not shown) to eject hot air from the pipe tip 50. As shown by an arrow A <b> 2 in FIG. 3, the hot air passes through the inside of the nozzle holder body 6 from the pipe tip 50 and is ejected from the tip of the nozzle 1. The worker applies hot air ejected from the tip of the nozzle 1 to the heating part, heats the part, and performs a predetermined operation. For example, hot air is applied to the soldering portion, and the solder is melted by the heat, whereby the component soldered to the substrate is removed from the substrate.

  When the work contents change and the nozzle 1 having a different shape is used, the worker replaces the nozzle holder 2 with the nozzle 1 to be replaced. That is, first, the nozzle holder 2 is removed from the adapter 10. The procedure is the reverse of the mounting procedure, and the nozzle holder body 6 is rotated in the direction opposite to the arrow A1 shown in FIG. Since the nozzle holder 2 is held with a relatively small frictional force acting between the clamp tip surface 3b and the tip contact surface 13a, it can be easily rotated. Then, when the operator rotates the nozzle holder body 6 to a position where the clamp 3 and the opening 17a coincide with each other as shown in FIG. 2 (b), the operator then pulls out the nozzle holder body 6 in the axial direction. 2 is removed from the pipe tip 50. At this time, since the screw 4 of the clamp 3 is loosened, the operator can easily pull out the nozzle holder body 6.

  Then, the worker installs the nozzle holder 2 to be used next again according to the above installation procedure.

  As described above, the adapter 10 has a simple structure, but by using this, the operator rotates the rotation of the nozzle holder 2 by inserting the nozzle holder 2 into the pipe tip 50 or rotating the nozzle holder 2. It can be performed by an extremely simple operation of pulling out. Therefore, even when it is necessary to frequently replace the nozzle holder 2, the replacement work is not troublesome, and a reduction in work efficiency can be suppressed.

  The nozzle holder 2 of this embodiment is exactly the same as the nozzle holder 2 having the conventional structure shown in FIG. Therefore, the nozzle holder 2 can be fixed to the pipe tip 50 alone without using the adapter 10. That is, by tightening the screw 4 of the clamp 3 (single fixing means), the diameter of the proximal end side of the nozzle holder main body 6 can be reduced, whereby the nozzle holder 2 can be fixed to the pipe distal end portion 50.

  An operator can freely select a method of using the adapter 10 as a method of mounting the nozzle holder 2 and a method of mounting the nozzle holder 2 alone without using the adapter 10. However, usually, the method using the adapter 10 is far superior in workability, so it is a good idea to select this method.

  In addition, the user may already have a wide variety of nozzle holders 2. In such a case, only by obtaining one adapter 10, the user can remarkably improve the exchange workability while diverting all the existing nozzle holders 2 as they are. In other words, providing the adapter 10 to such a user results in significant cost effectiveness for the user.

  FIG. 4 is a perspective view showing a mounting state of the adapter 30 according to the second embodiment of the present invention. The adapter 30 of this embodiment also makes it easy to attach and detach the same nozzle holder 2 as in the first embodiment. The adapter main body 31 of the adapter 30 is a C-shaped member made of a metallic wire. A clamp 32 (adapter fixing means) is provided at the opening. The clamp 32 is provided with a screw 33. The adapter main body 31 decreases in diameter when the screw 33 is tightened, and increases in diameter when the screw 33 is loosened.

  A U-shaped member 35 made of the same wire material as that of the adapter base end side 11 is fixed to the adapter base end side 11. The U-shaped member 35 is a member formed by bending a single wire in a U-shape that is laterally viewed from the front, and has a base end portion 36 with the bent portion as a boundary, and substantially perpendicular to the base end portion 36. A connecting portion 37 and an axial movement restricting portion 38 substantially parallel to the base end portion 36.

  The base end portion 36 is curved in an arc shape along the outer peripheral side of the adapter main body 31, and is fixed to the outer peripheral side of the adapter main body 31. The connecting portion 37 is a member that extends from one end of the proximal end portion 36 toward the distal end side in the axial direction of the pipe distal end portion 50. The axial direction movement restricting portion 38 is a member that extends from the distal end portion of the connecting portion 37 in the circumferential direction in the same direction as the proximal end portion 36. Moreover, the axial direction movement restriction | limiting part 38 has the inclination of the axial direction that the distance with the base end part 36 leaves | separates, so that it distances from the connection part 37, and becomes a shape which is a part of a spiral as a whole. Yes.

  The axial movement restricting portion 38 is in a mounted state of the nozzle holder 2, that is, the nozzle holder 2 is inserted into the pipe tip 50 and the circumferential position of the clamp 3 is within an angular range corresponding to the axial movement restricting portion 38. In this state, the movement of the clamp 3 toward the axially falling side is limited.

  The surface of the axial movement restricting portion 38 that faces the proximal end portion 36 is a distal end side contact surface 38a (spiral inclined surface). Further, the surface of the base end portion 36 that faces the axial movement restriction portion 38 is a base end side contact surface 36a. The distance between the proximal contact surface 36a and the distal contact surface 38a is shorter than the axial length of the clamp 3 in the vicinity of the shortest connecting portion 37, and the axial length of the clamp 3 in the longest portion away from the connecting portion 37. It is longer than that.

  Next, the operation of the hot air blowing type heating apparatus including a method for attaching and detaching the adapter 30 and the nozzle holder 2 will be described. However, parts common to the first embodiment will be omitted as appropriate.

  First, the operator attaches the adapter 30 to the pipe tip 50 in advance and fixes it. That is, the screw 33 of the adapter 30 is loosened to expand the diameter of the adapter main body 31, and the adapter main body 31 is fitted into the pipe tip 50. Thereafter, the operator tightens the screw 33 to reduce the diameter of the adapter main body 31, and fixes the adapter 10 to the pipe tip 50.

  Next, the operator appropriately selects the nozzle holder 2 having the nozzle 1 suitable for the work contents, and attaches this to the pipe tip 50 via the adapter 30. That is, the operator inserts the nozzle holder body 6 into the pipe distal end portion 50 by matching the position of the clamp 3 protruding from the nozzle holder body 6 with the position where the U-shaped member 35 is not provided. The operator inserts the nozzle holder body 6 to a depth where the base end surface of the nozzle holder body 6 is in contact with the adapter body 31.

  Next, the operator rotates the nozzle holder main body 6 in a direction (direction of arrow A1 in FIG. 4) in which the clamp 3 enters from the opening 35a of the U-shaped member 35. At this time, when the rotation angle is relatively small, there is a gap between the clamp tip surface 3b and the tip contact surface 38a. Since the tip side contact surface 38a is a spiral slope, the gap gradually decreases as the rotation angle of the nozzle holder body 6 is increased, and finally the gap disappears. That is, the clamp front end surface 3b contacts the front end side contact surface 38a (the state shown in FIG. 4).

  When the operator further rotates the nozzle holder body 6 slightly in the direction of the arrow A1 from the state in which the clamp front end surface 3b is in contact with the front end side contact surface 38a, the axial direction movement restricting portion 38 is slightly elastically deformed. A frictional force acts between the clamp tip surface 3b and the tip contact surface 38a by the restoring force. The clamp 3 is clamped between the proximal contact surface 36 a and the distal contact surface 38 a by this frictional force, and the nozzle holder 2 is held by the adapter 30. At this time, a portion on the distal end side contact surface 38a where the clamp distal end surface 3b and the distal end side contact surface 38a are in contact serves as a fixing portion 38b.

  When removing the nozzle holder 2, the procedure is reversed as in the first embodiment. In addition, the same effects as in the first embodiment can be obtained in that the nozzle holder 2 can be attached and detached by an extremely simple operation and that the nozzle holder 2 having a conventional structure can be used as it is.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, You may change suitably in the range of each claim. For example, the protruding portion that protrudes radially outward from the nozzle holder body 6 does not necessarily have to be the clamp 3 including the screw 4. In each of the above embodiments, the nozzle holder 2 having the clamp 3 is used to show that the nozzle holder 2 having a conventional structure can be used. However, for example, the protruding portion may be only one flange portion of the clamp 3. good.

  Further, the tip-side contact surface 13a and the tip-side contact surface 38a may be smooth inclined surfaces, but may be appropriately formed with irregularities in order to increase the frictional force with the clamp 3 (protruding portion). good.

  In the present embodiment, the spiral inclined surface is formed on the distal contact surface 13a or the distal contact surface 38a. However, this inclined surface is formed on the proximal contact surface 11a or the proximal contact surface 36a. May be.

It is a perspective view which shows the mounting state of the adapter of 1st Embodiment which concerns on this invention. (A) is a disassembled perspective view of the adapter and nozzle holder of 1st Embodiment, (b) is a perspective view which shows the middle state at the time of attaching a nozzle holder to a piping front-end | tip part using an adapter. It is a longitudinal cross-sectional view which shows the use condition using an adapter and a nozzle holder in 1st Embodiment. It is a perspective view which shows the mounting state of the adapter of 2nd Embodiment which concerns on this invention. It is a perspective view which shows the mounting state of the nozzle holder by the conventional holding structure.

Explanation of symbols

1 Nozzle 2 Nozzle holder 3 Clamp (protrusion, single fixing means)
6 Nozzle holder body 10 Adapter 13 Axial movement restricting portion 13a Tip side contact surface (contact surface)
13b Fixing part 14 Clamping part (Adapter fixing means)
30 Adapter 32 Clamp (Adapter fixing means)
38 Axial movement limiter 38a Tip side contact surface (contact surface)
38b Fixed part 50 Piping tip

Claims (5)

In a hot air jet type heating device that heats solder etc. by jetting hot air from the nozzle tip,
A nozzle holder having the nozzle, a substantially cylindrical nozzle holder main body for holding the nozzle, and a protrusion projecting radially outward from the nozzle holder main body is detachably attached to the front end of the substantially cylindrical pipe. An adapter for a hot air jet heating device,
Adapter fixing means for fixing the adapter to the tip of the pipe;
An axial movement that restricts the movement of the protruding portion toward the axial drop-off side when the circumferential position of the protruding portion is within a specific angular range with the nozzle holder inserted in the pipe tip. With a restriction part,
An adapter for a hot air jetting type heating apparatus, wherein a fixing portion for fixing the protruding portion at the portion is provided at a specific position in the axial movement restricting portion. The axial movement restriction portion has a contact surface facing the axial front end side of the protrusion,
In a state where the protrusion is in the axial movement restriction portion, the gap between the protrusion and the contact surface is configured to gradually decrease in one direction according to the angular position of the protrusion,
The hot air blast type heating device adapter according to claim 1, wherein a portion of the axial movement restricting portion corresponding to a position where the gap is eliminated serves as the fixing portion.   The adapter for a hot-air ejection type heating apparatus according to claim 2, wherein the contact surface is a slope inclined in a spiral shape. A nozzle holder holding structure for a hot-air jet type heating device in which the nozzle holder according to claim 1 is detachably attached to a substantially cylindrical pipe tip.
The nozzle holder has a nozzle holder single fixing means that can be fixed to the pipe tip alone.
A state in which the nozzle holder is attached to the pipe tip via the hot-air jet type heating device adapter according to any one of claims 1 to 3 and the nozzle holder alone fixing means to the pipe tip. A nozzle holder holding structure of a hot-air jet type heating device, wherein the nozzle holder holding structure can be selected depending on the state of mounting.   The nozzle holder holding structure for a hot-air jet type heating device according to claim 4, wherein the protruding portion of the nozzle holder is a part of the nozzle holder single fixing means.

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