JP2017042893A - Portable heat treatment tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a portable heat treatment tool, which blows hot air having a high temperature to perform heat treatment, to efficiently blow hot air and thereby sufficiently perform the heat treatment even in a narrow space in which the heat treatment is not sufficiently performed only by removing a nozzle attachment.SOLUTION: A portable heat treatment tool blows hot air having a high temperature to perform heat treatment and has: a tool body 11 having a heating part 40 and a blast part 30; and a nozzle attachment 80 which is detachably attached to the tool body 11. A detachment mechanism 50 for detaching the nozzle attachment 80 from the tool body 11 is attached to the tool body 11 so as to be detachable from the tool body 11.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a portable heat treatment tool that performs high temperature heat treatment.

  A portable heat treatment tool generally called a heat gun is known (see, for example, Patent Document 1). This portable heat treatment tool has a heat generating device and a blower, and blows out a high temperature wind up to about 600 ° C. at a high level. This portable heat treatment tool is used in various applications such as bending a resin product, peeling off a coating, or heat shrinking a thermal shrink film. For this reason, in the portable heat treatment tool, a plurality of types of nozzle attachments are prepared and detachable from the main body so that the blowing of hot air can be changed according to the application. Also, in such a portable heat treatment tool, a removal mechanism for removing the nozzle attachment is provided in the main body so that the nozzle attachment that has been heated to a high temperature can be easily removed without touching it directly after work. It has been.

International Publication No. 2007/071127

  By the way, in the portable heat treatment tool described above, it may be desired to perform heat treatment by blowing hot air into a narrow space. In such a case, if a long nozzle attachment is attached and hot air is blown out, the temperature of the blown hot air decreases and sufficient heat treatment cannot be performed. In addition, even if the nozzle attachment is removed to reduce the size and enter a narrow space, there is also a narrow space where the nozzle attachment cannot be entered with the removed size.

  The present invention has been made in view of such circumstances, and the problem to be solved by the present invention is to remove a nozzle attachment in a portable heat treatment tool that performs heat treatment by blowing hot hot air. Then, even in the heat treatment of a narrow space where sufficient heat treatment cannot be performed, it is to efficiently perform the heat treatment by blowing hot air efficiently.

  In solving the above-described problems, the portable heat treatment tool according to the present invention takes the following means. That is, the portable heat treatment tool according to the first aspect of the present invention is a portable heat treatment tool that performs heat treatment by generating high-temperature heat, and includes a main body having a heating part and a delivery part that generate heat by electricity. A detachable mechanism for detaching the tip nozzle part from the main body is detachably attached to the main body. This is the configuration. According to the portable heat treatment tool according to the first aspect of the present invention, the main body can be slimmed by removing both the tip nozzle portion and the removal mechanism from the main body. Accordingly, the slimmed main body can be invaded into a narrow space, and high-temperature heat can be emitted to a portion where heat treatment is desired, and desired heat treatment can be performed.

  A portable heat treatment tool according to a second aspect of the present invention is the portable heat treatment tool according to the first aspect, wherein the detaching mechanism is also formed as a cover that covers the periphery of the heat generating portion. This is the configuration. According to the portable heat treatment tool according to the second aspect of the present invention, since the removal mechanism is formed while also serving as a cover that covers the periphery of the heat generating portion, the function as a cover of the heat generating portion is exhibited while the removal mechanism is attached. it can. This makes it possible to reduce the size of the outer shape of the front portion on which the heat generating portion is provided while facilitating the removal of the tip nozzle portion by the removal mechanism, and it is possible to provide an easy-to-handle portable heat treatment tool.

  The portable heat treatment tool according to a third aspect of the present invention is the portable heat treatment tool according to the first or second invention, wherein the removal mechanism performs a removal operation when removing the tip nozzle portion. It has a configuration in which an operation unit is provided, and the operation unit is provided with a finger hooking unit protruding in a direction crossing the removal operation direction. According to the portable heat treatment tool according to the third aspect of the present invention, the operation portion that performs the removal operation when removing the tip nozzle portion is provided with the finger hook portion that protrudes in a direction intersecting the removal operation direction. ing. As a result, when the operation unit is operated, it becomes easy for a finger to be hooked on the finger hook unit, and the detachment operation is facilitated.

It is a perspective view of a heat gun. It is sectional drawing which shows the (II)-(II) cross-section arrow in FIG. It is sectional drawing which shows the (III)-(III) cross-section arrow in FIG. It is a perspective view of the heat gun from which the removal mechanism was removed from the tool body. It is a perspective view of the heat gun which isolate | separated the extrusion cylinder member of the removal mechanism of FIG. It is a perspective view of the heat gun which isolate | separated the operation member of the removal mechanism of FIG.

  Hereinafter, an embodiment for carrying out a portable heat treatment tool according to the present invention will be described with reference to FIGS. The code | symbol 10 shown in FIGS. 1-6 is the heat gun as a portable heat processing tool which concerns on this invention. FIG. 1 is a perspective view of the heat gun 10 in which the nozzle attachment 80 is removed from the tool body 11. 2 shows a sectional view taken along the line (II)-(II) in FIG. 1, and FIG. 3 shows a sectional view taken along the line (III)-(III) in FIG. The tool body 11 corresponds to the body according to the present invention. Further, in describing the heat gun 10, it will be described using a prescribed direction in the drawings. The heat gun 10 is a power tool for heat treatment used for various purposes such as bending of resin products, peeling of paint, and heat shrinkage of heat shrink film. This heat treatment is performed by blowing hot air having a high temperature of about 600 ° C.

  The heat gun 10 is configured by a handy type that is used by being held by hand, and has a pistol shape that is easy to use. The heat gun 10 includes a tool body 11 and a nozzle attachment 80. The nozzle attachment 80 corresponds to the tip nozzle portion according to the present invention. The nozzle attachment 80 is detachably attached to the tip of the tool body 11. The tool body 11 is provided with a removal mechanism 50. As will be described later in detail, the detaching mechanism 50 is used to easily remove the nozzle attachment 80 from the tool body 11.

  As shown in FIGS. 1 to 3, the tool body 11 has a pistol-shaped lower part formed as a grip part 20. On the upper side of the grip part 20, a blower part 30 as a delivery part is provided. A heating unit 40 is provided on the front side of the blower unit 30. In addition, since the removal mechanism 50 is attached to the outer periphery of the heat generating part 40, the heat generating part 40 is hidden and cannot be seen in the figure. That is, the removal mechanism 50 is formed while also serving as a cover that covers the periphery of the heat generating portion 40. A power cord 28 for power supply is drawn from the lower end of the grip portion 20. The power cord 28 is connected to a household power source in order to supply power to the heat gun 10. In addition, the code | symbol 29 shown in figure is a rubber member for protecting the power cord 28 withdraw | derived from the lower end of the grip part 20. FIG.

  As shown in FIG. 1, the grip part 20 is formed in the substantially cylindrical shape extended in an up-down direction. The grip part 20 is formed by a grip housing part 21. The grip housing part 21 is formed integrally with the blower housing part 31 that houses the blower mechanism 35. That is, the grip housing part 21 and the blower housing part 31 form an integral body housing 15. Incidentally, the main body housing 15 has a housing shape that is substantially divided into left and right parts made of resin. As shown in FIG. 2, the grip housing portion 21 extends straight while tilting to the front side from the lower portion 201 toward the upper portion 202. A grip end portion 22 is provided at the lower portion 201 of the grip portion 20.

  The grip end portion 22 has a larger outer diameter than the base end of the baseball bat. The grip end portion 22 has a shape in which the rear side and the front side are appropriately projected. The grip end portion 22 prevents the hand gripped from the grip portion 20 from falling off when the heat gun 10 is turned upside down and the grip portion 20 is gripped. An operation switch 23 is provided on the rear surface of the grip portion 20. The operation switch 23 is a switch for performing operations of “strong”, “weak” and “power off” of the air volume of the heat gun 10. The operation switch 23 is slid in three stages in the vertical direction to perform “strong”, “weak” and “power off” of the air volume. Incidentally, this type of product can be switched between the air volume 250 (l / min) and the air volume 550 (l / min) by switching from the operation switch 23. A switch substrate 24 is housed inside the grip housing portion 21. The switch board 24 is connected to a controller board 37 described later. The power cord 28 is pulled out from the lower end of the grip end portion 22.

  The blower unit 30 is connected to the upper portion 202 of the grip unit 20. The blower housing part 31 is connected to the upper side of the grip housing part 21. The blower housing part 31 is formed in a substantially cylindrical shape extending in the front-rear direction intersecting with the up-down direction in which the grip housing part 21 extends. A large number of intake holes 33 are provided in the rear portion of the blower housing portion 31 to allow intake of outside air. The intake hole 33 has an opening shape that communicates the inside and outside of the blower housing portion 31. A blower mechanism 35 is housed in a portion of the blower housing portion 31 that is continuous with the grip housing portion 21.

  The blower mechanism 35 includes a motor 351 and a centrifugal fan 353. The motor 351 is a widely used motor and is supplied with power via the controller board 37. The centrifugal fan 353 is attached to the drive shaft 352 of the motor 351. For this reason, the centrifugal fan 353 is rotated by receiving the rotational drive of the motor 351 and generates a wind as indicated by the symbol F in the figure. An appropriate airflow guide wall 355 is provided around the centrifugal fan 353. A controller board 37 is housed above the air blowing mechanism 35. The controller board 37 supplies the electric power from the household power supply supplied through the power cord 28 to the motor 351 and the heater mechanism 45.

  The controller board 37 receives control signals from the operation switch 23 and the temperature adjustment dial 38 and supplies power to the motor 351 and the heating element 46 based on the received signals. A temperature adjustment dial 38 is provided on the upper side of the controller board 37. The temperature adjustment dial 38 has an operation surface 39 set on the upper surface of the blower housing portion 31 so that the hot air temperature blown to the user can be adjusted. The temperature set by the temperature adjustment dial 38 is transmitted to the controller board 37. In addition, the main body housing 15 is screw-fastened so that the left and right halves are integrally formed by four screw portions 34.

  A heating unit 40 is provided on the front side of the blower unit 30. As shown in FIGS. 4 to 6, the front end of the main body housing 15 is set as an opening peripheral edge portion 16. The opening peripheral edge portion 16 is formed in a shape protruding forward so as to partially cover the rear end portion of the heat generating portion 40. The opening peripheral edge portion 16 is provided with an engaging groove 57 that allows a removal mechanism 50, which will be described in detail later, to be attached and detached. The engaging groove portion 57 is formed so that a groove is provided on the peripheral surface. The engaging groove portion 57 has a first groove portion 571 and a second groove portion 572 connected at the rear end of the first groove portion 571. The first concave groove 571 extends in the front-rear direction from the opening edge of the main body housing 15. The second groove portion 572 intersects with the first groove portion 571 in the orthogonal direction and extends in the circumferential direction.

  The heating unit 40 includes a heater mechanism 45 inside a heater housing 41. The heater housing 41 is formed in a metal cylinder shape. The heater housing 41 is a separate member from the main body housing 15 described above, and is integrally connected to the main body housing 15 at the opening peripheral portion 16 of the main body housing 15. The heater housing 41 is supported by the main body housing 15 by sandwiching substantially the left and right halves of the opening peripheral edge portion 16 of the main body housing 15. The heater housing 41 includes a heater mechanism 45 inside. In addition, an outer peripheral surface 42 to which the removal mechanism 50 can be attached is formed on the outside. The outer peripheral surface 42 forms a smooth cylindrical peripheral surface. Further, the front end of the heater housing 41 is opened as a blowout opening 43 that allows high-temperature hot air to be blown out.

  The heater mechanism 45 includes a heating element 46 and a ceramic member 47. Electric power is supplied to the heating element 46 via the controller board 37. The heating element 46 supplied with power generates heat up to a high temperature. This high temperature is, for example, 600 ° C. The ceramic member 47 is formed in a shape that covers the outer periphery of the heating element 46. A heating element 46 is attached to the ceramic member 47. For this reason, the air sent by the blower mechanism 35 passes through the inside of the heater housing 41, is heated to a high temperature by the heater mechanism 45, and is blown forward from the blowout port 43 at the front end. Incidentally, the wind blown from the blowout port 43 is heated by the heater mechanism 45 to become hot air of 100 ° C. to 550 ° C.

  A mounted portion 44 is provided on the outer peripheral surface 42 of the heater housing 41 in the vicinity of the outlet 43. The mounting portion 81 of the nozzle attachment 80 is externally mounted on the mounted portion 44. The outer fitting of the mounting portion 81 with respect to the mounted portion 44 is press-fitted with an appropriate outer fitting pressure. For this reason, a frictional force is generated between the mounted portion 44 and the mounting portion 81 due to the external fitting pressure. The frictional force due to the external fitting of the mounting portion 81 prevents the mounting portion 81 of the nozzle attachment 80 from being detached from the mounted portion 44. That is, the mounting state of the nozzle attachment 80 on the tool body 11 is held by this frictional force. Incidentally, the removal mechanism 50 described later slides the nozzle attachment 80 to the front side against this frictional force, and acts so as to remove the nozzle attachment 80 from the mounted portion 44.

  The nozzle attachment 80 is a member prepared in a plurality of types according to the application of the heat treatment by the heat gun 10. The nozzle attachment 80 is a member that can be attached to and detached from the mounted portion 44, and is a member that changes the manner in which hot air is blown out. For this reason, the nozzle attachment 80 includes a mounting portion 81 that is attached to and detached from the mounted portion 44, an airflow guide wall portion 82 that guides the hot air that is sent, and a blowout opening portion 83 that blows out the hot air. The illustrated nozzle attachment 80 is for blowing hot air flat. For this reason, the airflow guide wall portion 82 and the blowout opening 83 are set in the airflow passage of the nozzle attachment 80 so as to change from the circular shape of the blowout port 43 to a long and thin rectangle. Reference numeral 84 denotes a rear edge of the nozzle attachment 80.

  Next, the removal mechanism 50 for removing the nozzle attachment 80 will be described. The removal mechanism 50 is detachably attached to the outer periphery of the heater housing 41. The perspective views of FIGS. 4 to 6 illustrate the configuration of the removal mechanism 50 in an easy-to-understand manner. 4 shows that the detaching mechanism 50 is removed from the tool body 11, FIG. 5 shows that the extruded cylinder part of FIG. 4 is separated, and FIG. 6 shows that the operation part of FIG. It shows that it is separated. The removal mechanism 50 generally includes a holder portion 51 and an operation mechanism 60. The detaching mechanism 50 is formed while also serving as a cover that covers the periphery of the heat generating portion 40.

  The holder 51 is provided with a structure that can be attached to and detached from the tool body 11 and a structure that holds the operation mechanism 60 so as to be relatively displaceable. The holder part 51 is molded using a resin as a material. The holder part 51 generally has an annular main body 52 and a guide part 53. The annular main body 52 is formed in a substantially annular shape having an outer circumferential surface 521 of an arc. The outer peripheral surface 521 is provided with a cut portion 522 extending in the front-rear direction. The cut portion 522 is formed such that a cut step is formed on the outer peripheral surface 521. By this cut portion 522, the outer peripheral surface 521 is easily hooked in the circumferential direction.

  The guide portion 53 extends forward from the inner peripheral surface near the front end of the annular main body 52. The guide portions 53 are arranged in pairs at positions facing the annular main body 52 at 180 degrees. The guide part 53 is set to the left and right positions in FIG. The guide portion 53 is in sliding contact with the connection peripheral surface portion 75 of the operation member 71. By the sliding contact of the connection peripheral surface portion 75 with respect to the guide portion 53, the operation mechanism 60 is smoothly moved in the front-rear direction. An accommodating portion 54 that accommodates the compression spring 58 is provided inside the guide portion 53. The front end of the compression spring 58 is in contact with the shape of the front wall inside the housing portion 54.

  As shown in FIGS. 4 to 6, the holder portion 51 is provided with an engaging convex portion 56. The engaging convex portion 56 is provided on the inner peripheral surface near the rear end of the annular main body 52. The engaging convex portion 56 has a circular shaft shape and slightly protrudes toward the annular center. The engaging convex portion 56 engages with the engaging concave groove portion 57. Specifically, the engagement convex portion 56 is fitted into the first concave groove portion 571 extending in the front-rear direction, and the holder portion 51 is moved to the rear side. Thereafter, the engaging convex portion 56 is fitted into the second concave groove portion 572 extending in the circumferential direction, and the holder portion 51 is rotated in the circumferential direction. In this way, the holder portion 51 is in an attached state with respect to the tool body 11.

  The operation mechanism 60 is supported by the holder portion 51 so as to be relatively movable in the front-rear direction. The operation mechanism 60 generally includes an extruded cylinder member 61, an operation member 71, and two compression springs 58. The extruded cylinder member 61 is formed in a substantially cylindrical shape extending in the front-rear direction. The extruded cylinder member 61 has an outer peripheral surface 62 having a diameter slightly larger than the outer peripheral surface 42 of the heater housing 41. A flange portion 65 is provided at the rear end of the extruded cylinder member 61 so as to project outward in the radial direction. The flange portion 65 is provided with a rear end contact portion 66 against which the rear end of the compression spring 58 abuts. The rear end abutting portion 66 corresponds to the above-described guide portion 53 (accommodating portion 54), and is disposed in a pair at a position facing the flange portion 65 at 180 degrees.

  The flange portion 65 is provided with two screw holes 67 through which the fastening screws 68 are inserted. The two screw holes 67 are disposed between the two rear end abutting portions 66, and are disposed in pairs at positions facing the flange portion 65 at 180 degrees. The fastening screw 68 inserted through the screw hole 67 is fastened to a female screw portion 76 of the operation member 71 described below. At this time, the compression spring 58 is accommodated in the accommodation portion 54 in a compressed state. For this reason, the operating mechanism 60 including the metal extruded cylinder member 61 is urged toward the rear side by the elastic restoring force of the compression spring 58. The front end edge 69 of the extruded cylinder member 61 is set as a portion that contacts the rear end edge 84 of the nozzle attachment 80 when the nozzle attachment 80 is removed.

  The operation member 71 corresponds to an operation unit according to the present invention. The operation member 71 includes an annular portion 72 and a connection peripheral surface portion 75 provided on the rear side of the annular portion 72. The connection peripheral surface portion 75 is a surface that is in sliding contact with the guide portion 53. The connection peripheral surface portion 75 is provided with a female screw portion 76 to which the fastening screw 68 is screwed. The front end of the synthetic resin operation member 71 is provided with an opening 77 that is open so that the extruded cylinder member 61 can protrude. The annular portion 72 is provided with an operation recess 73 having an outer peripheral surface appropriately recessed. Thus, by providing the operation recessed part 73, the front-end edge of the operation member 71 is set as the finger hook part 74 on which a user's finger is hooked. The finger hook portion 74 is projected in the radial direction of the extruded cylinder member 61. The protruding direction of the finger hook portion 74 is a direction intersecting with the front direction that is the removal operation direction.

  The operation member 71 set in this way constitutes the operation mechanism 60 by assembling the two compression springs 58 and the extruded cylinder member 61 as described above. Further, by this assembly, the operation mechanism 60 is also assembled to the above-described holder portion 51 to form the removal mechanism 50. The detaching mechanism 50 is in a state of being integrated with the tool body 11 in a manner of engaging the engaging convex portion 56 of the holder portion 51 with the engaging concave groove portion 57. In a state where the detaching mechanism 50 is attached to the tool body 11, if the finger is placed on the finger hook portion 74 and the operation member 71 is moved forward against the urging force of the compression spring 58, an integrated extruded cylinder member 61 is also moved forward.

  Here, the front end edge 69 of the extruded cylinder member 61 hits the rear end edge 84 of the nozzle attachment 80 and pushes the nozzle attachment 80 forward. Then, the mounting portion 81 of the nozzle attachment 80 is gradually shifted to the front side from the mounted portion 44 that has been externally mounted, and the nozzle attachment 80 is eventually detached from the mounted portion 44. When the finger attached to the finger hooking portion 74 is removed after the nozzle attachment 80 is removed from the mounted portion 44, the operating member 71 returns to the initial position before the removing operation by the urging force of the compression spring 58. It will be.

  According to the heat gun 10 configured as described above, the following operational effects can be achieved. According to the heat gun 10 described above, the heater housing 41 can be exposed to the outside by removing both the nozzle attachment 80 and the removal mechanism 50 from the tool body 11. That is, the nozzle of the heat gun 10 having the outer peripheral surface 42 of the heater housing 41 as the outermost diameter can be obtained. If the nozzle can be slimmed in this way, the slimmed nozzle can be allowed to enter a narrow space. In addition, since the hot air is blown out directly from the blowout opening 43 without going through the nozzle attachment, the temperature of the hot air blown out does not drop. As a result, a desired heat treatment can be performed by blowing hot hot air to a location where heat treatment is desired.

  Further, according to the heat gun 10 described above, the removal mechanism 50 is formed while also serving as a cover that covers the periphery of the heat generating portion 40, so that the function as a cover of the heat generating portion 40 can be exhibited while the removal mechanism 50 is attached. As a result, it is possible to reduce the size of the outer shape of the front portion where the heat generating portion 40 is provided while facilitating the removal of the nozzle attachment 80 by the removal mechanism 50, and the heat gun 10 can be easily handled. Further, according to the heat gun 10 described above, the operation member 71 that performs the removal operation when removing the nozzle attachment 80 is provided with the finger hooking portion 74 protruding in the radial direction perpendicular to the front direction as the removal operation direction. Therefore, when the operation member 71 is operated, the finger hooking portion 74 can be easily put on the finger and the detaching operation can be easily performed.

  A hole 32 is provided in front of the lower end of the grip housing part 21, and a hole 36 is provided at the upper end near the center in the front-rear direction of the blower housing part 31. These holes 32 and 36 are for suspending the tool body 11 from above using a hook or the like. When the grip housing part 21 obstructs the work, the tool body 11 is used in an upside-down posture using the hole 32. In this case, the blowing direction is inclined downward by the inclination of the outlet 43. When the air blowing direction is desired to be horizontal, the air blowing housing 31 can be brought into a horizontal posture by using the hole 36 near the upper center of the center of gravity of the tool body 11.

  In addition, in the portable heat processing tool which concerns on this invention, it is not limited to above-described embodiment, A various change can be added suitably. For example, the configuration for attaching and detaching the detaching mechanism with respect to the main body is not limited to the configuration of the engagement convex portion 56 and the engagement concave groove portion 57 described above, and is configured using a known engagement configuration. It may be a thing. That is, the removal mechanism according to the present invention only needs to be detachable from the main body.

10 Heat gun (portable heat treatment tool)
11 Tool body (main body)
15 Body housing 16 Opening peripheral edge part 20 Grip part 201 Lower part 202 Upper part 21 Grip housing part 22 Grip end part 23 Operation switch 24 Switch board 28 Power cord 29 Rubber member 30 Blower part (sending part)
31 Blower housing portion 33 Air intake hole 34 Screw portion 35 Blower mechanism 351 Motor 352 Drive shaft 353 Centrifugal fan 355 Airflow guide wall 37 Controller board 38 Temperature adjustment dial 39 Operation surface 40 Heat generating portion 41 Heater housing 42 Outer peripheral surface 43 Air outlet 44 Covered Mounting portion 45 Heater mechanism 46 Heating element 47 Ceramic member 50 Removal mechanism 51 Holder portion 52 Annular body 521 Outer peripheral surface 522 Notch portion 53 Guide portion 54 Housing portion 56 Engaging convex portion 57 Engaging concave groove portion 571 First concave groove portion 572 Second Recessed groove portion 60 Operating mechanism 61 Push-out cylinder member 62 Outer peripheral surface 65 Flange portion 66 Rear end abutting portion 67 Screw hole 68 Fastening screw 69 Front end edge 71 Operating member 72 Annular portion 73 Operating recess 74 Finger hook portion 75 Connection peripheral surface portion 76 Female screw Part 77 Opening 80 Nozzle attachment (tip nozzle part)
81 Mounting portion 82 Airflow guide wall portion 83 Blowout opening portion 84 Rear edge

Claims (3)

A portable heat treatment tool that generates heat at high temperature and performs heat treatment,
A main body having a heat generating portion and a delivery portion that generate heat by electricity, and a tip nozzle portion that is detachable from the main body,
A portable heat treatment tool, wherein a removal mechanism for removing the tip nozzle portion from the main body is detachably attached to the main body. The portable heat treatment tool according to claim 1,
The removal mechanism is a portable heat treatment tool that is formed while also serving as a cover that covers the periphery of the heat generating portion. The portable heat treatment tool according to claim 1 or 2,
The removal mechanism has an operation part that performs a removal operation when removing the tip nozzle part,
The portable heat treatment tool, wherein the operation portion is provided with a finger hook portion that protrudes in a direction crossing the removal operation direction.

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