JP2016110824A - Portable induction heating welding apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable induction heating welding apparatus which facilitates the induction heating work, and subsequent cooling pressing work.SOLUTION: A portable induction heating welding apparatus 100 for heating a welding object OB by electromagnetic induction and welding includes a power supply 2, an electromagnetic heating coil unit including a base having a pressing surface facing the welding object and a heating coil, a power supply 3 for supplying a current to the electromagnetic heating coil unit 4 by using power from the power supply 2, a control unit 5 for controlling the power supply 3, and a pressing pad 9 applied to the base 41 so as to cover the pressing surface.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a portable heat welding apparatus that heats and welds an object to be welded using magnetic induction heating.

  For example, in waterproofing work for construction work or civil engineering work, for example, waterproofing work for flat roofs, etc., a conductive piece coated with a resin having heat adhesiveness is fixed to the surface of a frame such as concrete with an anchor bolt, and then a waterproof sheet is formed on the frame. A construction method is known in which the sheet is bonded and fixed on the housing by inductively heating the conductor piece and a heating device is used for such a construction method.

  An induction heating apparatus for construction waterproof sheet construction according to Patent Document 1 includes an apparatus main body that is movable by being connected to a commercial power source, and a heating holder that is connected to the apparatus main body by a cable. An apparatus is provided, and the heating holder is provided with an induction coil that is fed via a cable. When constructing the waterproof sheet, fix the conductor pieces having the heat-welding material layer on the upper surface of many required positions on the waterproof construction surface, and stretch the waterproof sheet covering this construction surface over the entire waterproof construction surface. The conductor piece is induction-heated from above the waterproof sheet by using this induction heating device, and the waterproof sheet is welded and fixed to the conductor piece by the melted material layer.

  Each time induction heating for melting the heat-welding material layer of each conductor piece is completed, the heating holder is moved sideways, and cooling is performed while pressing, for example, a cloth or cushion containing water against the welding region. This cooling is important because the heat of the adhesive part is taken away by this cooling, and the adhesive resin quickly solidifies and firmly adheres, and the temperature rise of the waterproof sheet is prevented and its thermal deformation is prevented. It is.

JP 2003-313993 A

  As described above, every time welding by induction heating is completed, the work of placing the heating holder sideways and cooling it while pressing a cooling pressure cushion or the like against the welding region becomes a burden on the operator. In particular, every time induction heating with a heavy heating holder is completed, it is a burden on the operator to replace the heating holder and the cooling pressure cushion. In particular, the burden is great at construction sites where the number of welds is several hundred or more, and improvements are desired.

  In order to solve the above-mentioned problems, a portable induction heating welding apparatus for heating and welding a welding object by electromagnetic induction according to the present invention includes a power source, a base having a pressing surface facing the welding object, and a heating coil. An electromagnetic heating coil unit comprising: a power supply unit that supplies electric current to the electromagnetic heating coil unit using electric power from the power supply unit; a control unit that controls the power supply unit; and the presser surface so as to cover the pressing surface And a pressing pad attached to the base.

  According to this configuration, after the welding object is welded by induction heating with the electromagnetic heating coil unit in a posture in which the holding surface faces the welding object, induction heating is stopped and the holding surface is kept in the posture as it is. By pressing the covering pressing pad in the direction of the welding object, the welding object can be firmly bonded. Thereby, in the welding fixing work in one welding location, it becomes unnecessary to change the apparatus to heat and the apparatus to crimp | bond, and workability | operativity improves.

  In a preferred embodiment of the present invention, the power source unit is configured by a rechargeable battery, and a housing is provided to integrally attach the battery, the electromagnetic heating coil unit, the power feeding unit, and the control unit. ing. This configuration eliminates the need for a power cable and improves workability. In addition, since the components such as the battery and the electromagnetic heating coil unit are integrally formed by the housing, the apparatus itself becomes heavy, but this weight is advantageous for crimping the welded portion. The conventional act of pressing the operator with weight is not necessary, and a sufficient crimping force can be obtained stably by the weight of the apparatus, which is advantageous.

  Particularly in the summer, cooling of the welded portion cannot be sufficiently achieved simply by stopping the power supply to the electromagnetic heating coil unit and stopping the induction heating. For this reason, in one of the suitable embodiment of this invention, the cooling mechanism which forcedly cools a welding location through a press pad is provided. Thereby, the cooling to a welding location is improved and the rapid fixation of a welding location and suppression of a thermal deformation are performed efficiently.

  At that time, the cooling mechanism includes a cooling fan that generates cooling air, and a cooling passage is formed so that the cooling air cools the pressing pad, thereby realizing reliable and sufficient cooling of the welding location. Is done.

  In one preferred embodiment of the present invention, the cooling passage includes a pad side cooling passage formed in the pressing pad. Thereby, a press pad can contact cooling air in a wide location, and is cooled effectively. Thereby, the cooling with respect to a welding location is strengthened.

  In one preferred embodiment of the present invention, in order to further enhance the cooling of the welding location, the pad-side cooling passage includes a groove-like passage formed in a groove shape on a surface facing the pressing surface of the pressing pad. And an outflow hole that communicates with the groove-like passage and penetrates the pressing pad. Thereby, the cooling air effectively flows through the pressing pad, the pressing pad is rapidly cooled, and as a result, the welded portion is cooled.

It is a schematic diagram which shows the basic structure of the portable induction heating welding apparatus by this invention. It is a schematic diagram which shows the modification of the cooling channel | path of the portable induction heating welding apparatus by this invention. It is a perspective view which shows one of the embodiments of the portable induction heating welding apparatus by this invention. It is a perspective view which shows a waterproof sheet fixing metal fitting. It is sectional drawing of a waterproof sheet fixing metal fitting. It is sectional drawing which shows the formation condition of a waterproof layer. It is a schematic diagram which shows the component of a portable induction heating welding apparatus, and the flow of control. It is a functional block diagram which shows the control system of a portable induction heating welding apparatus. It is a side view of the pistol type induction heating welding apparatus which is another embodiment. It is a schematic diagram which shows another embodiment of a heating coil unit. It is a schematic diagram which shows the modification of the heating coil unit by FIG.

Before describing a specific embodiment of the portable induction heating welding apparatus according to the present invention, the basic structure characterizing the present invention will be described with reference to FIG.
Although schematically shown in FIG. 1, in the portable induction heating welding apparatus 100, substantially all of the components are integrally assembled by the housing 1. Here, the housing 1 is a cylindrical body whose upper part is closed by a top plate 11 and whose lower part is open. A rechargeable battery 2 that functions as a power supply unit is disposed below the top plate 11. A power feeding unit 3 is disposed below the battery 2, and an electromagnetic heating coil unit 4 is disposed below the power feeding unit 3. The electromagnetic heating coil unit 4 includes an electromagnetic heating coil (hereinafter simply referred to as a heating coil) 40 and a base 41 that supports the heating coil 40. The base 41 includes a disc portion 42 and a post portion 43 that is erected at the center of the disc portion 42. A circular recess 44 is formed on the bottom surface of the disc portion 42, and the heating coil 40 is held in the recess 44. Since the bottom surface of the disc portion 42 including the lower end of the heating coil 40 functions as a pressing surface that suppresses the object to be welded OB, it is formed in a substantially flat surface.

  The control unit 5 that controls the power feeding unit 3 is disposed in a gap space between the battery 2 or the power feeding unit 3 and the housing 1. In the example of FIG. 1, the battery 2 is disposed adjacent to the mounting portion.

  In the example of FIG. 1, the welding object OB of the portable induction heating welding apparatus 100 is a fixture 70 fixed to a slab such as a rooftop of a building, and a waterproof sheet 7 joined to the fixture 70. A thermoplastic adhesive layer is formed on the flat fixing surface of the fixture 70, and the waterproof sheet 7 is stacked on the fixture 70, and the portable induction heating welding device 100 is pressed thereon, followed by heating work and thereafter. The pressing operation is performed. By repeating the melt bonding operation consisting of the heating operation and the pressing operation, the waterproof sheet 7 is joined to a large number of fixtures 70, and the waterproof sheet 7 is laid on the slab.

  After the adhesive is melted by induction heating, the waterproof sheet 7 is pressed against the fixture 70 at a predetermined pressure at a temperature at which the adhesive is cured for a predetermined time, whereby a good joint between the fixture 70 and the waterproof sheet 7 can be obtained. . The portable induction heating welding apparatus 100 according to the present invention performs a pressing operation by pressing the disc portion 42 of the base 41 against the waterproof sheet 7 as it is after heating. In order to effectively perform this pressing operation, the pressing pad 9 is attached to the disk portion 42 of the base 41 so as to cover the pressing surface which is the bottom surface of the disk portion 42.

  The pressing pad 9 shown in FIG. 1 is formed as a mounting pad 90 in the form of a shoe that covers the pressing surface of the disc portion 42 from below. The mounting pad 90 is made of a resin material such as soft rubber having cushioning properties, and has a pressing portion 91 that has the same shape as the lower surface of the disc portion 42 and is in close contact with the lower surface, and an outer peripheral edge of the pressing portion 91. And a side wall portion 92 having a ring-shaped flange portion 93 that rises perpendicularly from the top and holds down the upper surface edge of the disc portion 42. The mounting pad 90 can be attached to the disc portion 42 so that the disc portion 42 is fitted into a space defined by the pressing portion 91, the side wall portion 92, and the ring-shaped flange portion 93. The pressing portion 91 has a thickness for effectively pressing the waterproof sheet 7 after induction heating. Since the wearable pad 90 can be easily removed, the wearable pad 90 having an appropriate thickness and cushioning property can be used by exchanging it according to the situation.

  Furthermore, it is important that the temperature of the mounting pad 90 is low during the pressing operation. Since the wearable pad 90 is exposed to the heat of the fixture 70 that is the object to be welded OB during induction heating, the wearable pad 90 is effectively cooled when induction heating is completed. It is necessary to Therefore, the portable induction heating welding apparatus 100 shown in FIG. 1 is provided with a cooling fan unit 60 as a cooling mechanism 6 that is positioned above the heating coil 40 and forcibly cools the heating coil 40. The cooling fan 61 of the cooling fan unit 60 is driven by a motor (not shown), and sends cooling air to the heating coil 40 and the mounting pad 90 through a cooling passage 62 that allows the cooling air provided in the base 41 to pass through. The heating coil 40 and the mounting pad 90 that have finished heating are cooled.

  In the example of FIG. 1, the cooling passage 62 includes a passage hole 45 extending at the center of the base 41 whose one end opens to the cooling fan 61 and the other end opens to the recess 44 of the base 41. In order to supply a larger amount of cooling air to the heating coil 40 and the mounting pad 90, a plurality of through holes may be provided above the recess 44 of the base 41. Furthermore, a pad-side cooling passage may be formed in the mounting pad 90.

  FIG. 2 shows a more preferable form of the cooling passage 62. In this embodiment, as the pad-side cooling passage, a central recess 94 for diversion and a groove-like passage 95 formed in the shape of a groove extending outward in the circumferential direction from the central recess 94 are provided on the surface facing the pressing surface of the mounting pad 90. Is formed. The outer end of the groove-like passage 95 is formed as an outflow hole for discharging cooling air to the outside. Accordingly, the cooling air flows directly between the pressing surface created by the pressing pad 9 and the heating coil 40 and the mounting pad 90, and the mounting pad 90 is forcibly and effectively cooled. As a result, the cooling effect on the waterproof sheet 7 is also increased, the adhesive is quickly solidified and firmly fixed, the temperature rise of the waterproof sheet 7 is prevented, and thermal deformation thereof is also prevented.

  Since the bottom surface of the mounting pad 90 contacts the waterproof sheet 7, at least the mounting pad 90 is configured to protrude from the opening of the housing 1.

  In order to eliminate the need for the power cord, the battery 2 employed as the power source is housed in the housing 1 and can be removed from the housing as needed. In the example of FIG. 1, it is removable and attachable through an opening (which may be closed with a lid) formed in the side wall of the housing 1. The power supply unit 3 includes a power electronics circuit such as an inverter circuit that converts a direct current from the battery 2 into a high-frequency current. By supplying the high-frequency current generated by the power supply unit 3 to the heating coil 40 of the electromagnetic heating coil unit 4, the fixture 70 positioned facing the pressing portion 91 of the mounting pad 90 is electromagnetically heated. .

  Next, one specific embodiment of the portable induction heating welding apparatus 100 according to the present invention will be described. Again, this portable induction heating welding apparatus 100 is used to fix the waterproof sheet 7 to a fixture 70 fixed to a waterproof base on a rooftop or the like. At that time, the adhesive layer applied to the upper surface of the fixture 70 is melted by heating the fixture 70 by electromagnetic induction, and then the waterproof sheet 7 and the waterproof sheet 7 through the pressing pad 9 under the operation of the cooling mechanism 6. It is pressed between the fixtures 70. Thereby, the waterproof sheet 7 is bonded and fixed to the fixture 70.

  FIG. 3 is a perspective view showing the roof slab of the building before the waterproof sheet 7 is laid. This perspective view shows an operation of bonding a sheet material, which is a waterproof sheet 7, to a fixing tool 70 disposed on a reinforced concrete slab body serving as a waterproof base, using a portable induction heating welding apparatus 100. Yes. This portable induction heating welding apparatus 100 employs the basic structure described with reference to FIG.

  The slab body assumes a roof slab. However, in addition to slabs of reinforced concrete structure, slabs formed by laying ALC panels, slabs formed by combining deck plates and metal folded plates and concrete, and those with a heat insulation layer laminated on them, etc. The present invention can be applied to various types of slabs. It is preferable that the slab body can fix the fixing tool 70 with an anchor bolt or the like.

For example, as shown in FIGS. 3, 4, and 5, the fixture 70 melts as an adhesive to the waterproof sheet 7 on the upper surface of a stainless steel disc having a diameter of about 50 to 100 mm and exhibits adhesiveness. A washer-shaped body coated with a planar hot-melt adhesive layer (hereinafter simply referred to as an adhesive layer) 71 made of a thermoplastic synthetic resin such as a polyester resin. The fixture 70 is formed with a countersink recess 72 at the center and an attachment hole 74 of an anchor bolt 79 (see FIG. 6) at the bottom, and the upper surface of the fixture 70 has a predetermined width around the countersink recess 72. An annular recess 73 is formed with a gap therebetween. The fixtures 70 are arranged on the slab body at respective positions at predetermined intervals in the vertical and horizontal directions, and are fixed by screws through the attachment holes 74.
Note that the fixture 70 is formed into a undulating shape as shown in the figure by pressing a sheet metal, and by forming concave portions such as the countersink concave portion 72 and the annular concave portion 73, a secondary cross-section is maintained as a flat plate. The moment increases and high strength can be obtained even with a thin plate.

  The waterproof sheet 7 having a large area is composed of a PVC sheet, and a roll body is formed by winding a long waterproof sheet material having a predetermined width dimension at a factory, and the roll body is arranged while being spread on the site. It is created by adhering the side edges of each waterproof sheet 7. Of course, the waterproof sheet 7 may be formed in advance according to the area to be laid, and the material may be rubber or TPE (thermoplastic elastomer) in addition to PVC. ) Sheet or a waterproof sheet 7 made of other materials.

  As shown in FIG. 6, in order to fix the waterproof sheet 7 to the slab body, first, the waterproof sheet 7 is put on a number of fixtures 70 (see FIG. 6A). Next, the portable induction heating welding device 100 is set at a position directly above the fixture 70 from above the waterproof sheet 7, and induction heating is performed on the fixture 70 (see FIG. 3). By heating the fixing tool 70, the adhesive layer 71 is melted, and the upper surface of the fixing tool 70 and the lower surface of the waterproof sheet 7 are brought into close contact with each other through the melted adhesive, and then the pressure is applied while cooling. 70 and the waterproof sheet 7, and as a result, the waterproof sheet 7 and the slab body are fixed (see FIG. 6B).

  FIG. 7 schematically shows a basic structure of portable induction heating welding apparatus 100 in this embodiment and a signal flow in induction heating control using portable induction heating welding apparatus 100. FIG. 8 shows a functional block diagram of a control system of the portable induction heating welding apparatus 100.

  In this embodiment, the portable induction heating welding apparatus 100 includes a housing 1 in which an upper end of a cylindrical body 12 having a circular cross section is closed with a top plate 11. The cylindrical body 12 is divided into three spaces by two partition walls 13a and 13b, and a first space S1, a second space S2, and a third space S3 in order from the top. The battery 2 is disposed in the uppermost first space S1, the power feeding unit 3 and the control unit 5 are disposed in the intermediate second space S2, and the electromagnetic heating coil unit is disposed in the lowermost third space S3. 4 and a cooling fan unit 60 are arranged. The top plate 11 is provided with an arched grip 19.

  The wall 12 surrounding the first space S1 of the cylindrical body 12 is provided with an opening 12a for taking in and out the battery 2, and the battery 2 is provided on the wall surface at a position facing the opening 12a. 17 is detachable.

  In the wall body surrounding the second space S2 of the cylindrical body 12, in order to release heat released from the power feeding section 3 and the control unit 5 accommodated in the second space S2, a large number of outside air circulation ports are provided. Is formed.

  The electromagnetic heating coil unit 4 and the cooling fan unit 60 as the cooling mechanism 6 are integrally assembled, and the upper end portion thereof is connected to the partition wall 13b. The electromagnetic heating coil unit 4 includes a heating coil 40 and a base 41 that holds the heating coil 40, and the base 41 is a post portion that is erected at the center of the disc portion 42 and the disc portion 42. 43. A mounting pad 90 as shown in FIG. 1 is mounted on the disc portion 42 as the pressing pad 9. A cooling fan unit 60 is provided at the upper end of the post portion 43. As described with reference to FIG. 1, the post portion 43 and the disc portion 42 are formed with a cooling passage 62 through which the cooling air from the cooling fan unit 60 passes. The cooling fan unit 60 supplies cooling air to the heating coil 40 and the mounting pad 90 by driving the fan by a motor (not shown). Thereby, the cooling effect with respect to the waterproof sheet 7 improves. In FIG. 7, the wearable pad 90 is shown in the form of a basic pad in which no special passage for cooling air is formed, but of course, as shown in FIG. A pad formed with a cooling air passage composed of 94, a groove-like passage 95 and the like may be mounted.

  As shown in FIG. 8, the control unit 5 includes a detection signal evaluation unit 51, a heating behavior calculation unit 52, a heating control unit 53, and a cooling control unit 54 as functional units related to the present invention. These functions are substantially realized by starting a program. The control unit 5 is connected to various external devices via the input / output interface 50. As external devices, a memory device 55, a data communication unit 56, a notification unit 57, a temperature detection unit 80, a sensor / switch group 8, and a GPS unit 800 are connected. Further, the control unit 5 is connected to a controller and a power supply unit 3 built in the battery 2 so as to be able to transmit a signal such as a control signal.

  In this embodiment, the temperature detection unit 80 includes a surface temperature detector 801 that detects the surface temperature of the waterproof sheet 7 and an environmental temperature detector 802 that detects the environmental temperature around the waterproof sheet 7. The detection signal is sent to the control unit 5. The surface temperature detector 801 and the environmental temperature detector 802 are mounted on a bracket provided in the housing 1. The sensor / switch group 8 is a general term for sensors and switches incorporated in the portable induction heating welding apparatus 100. As particularly relevant to the present invention, the operation switch 81, the pressure-sensitive switch (or the pressure-sensitive sensor). ) 82, a position detection sensor 83. The operation switch 81 is provided around the grip 19 of the housing 1 and has an induction heating start function. The pressure sensitive switch 82 is provided between the disc portion 42 and the pressing pad 9 and detects the pressing pressure against the waterproof sheet 7 during the pressing operation after induction heating. The position detection sensor 83 detects whether or not the fixture 70 is accurately positioned within the induction heating effective range of the heating coil 40. In this embodiment, the position detection sensor 83 detects the fixture 70, preferably three or more. This is a magnetic sensor. The GPS unit 800 detects a radio wave from a satellite such as a GPS satellite, calculates a current position (azimuth coordinate) of the portable induction heating welding apparatus 100, and gives it to the control unit 5.

  The detection signal evaluation unit 51 of the control unit 5 evaluates signals input from the sensor / switch group 8, the temperature detection unit 80, and the GPS unit 800, and sends the evaluation signal to a function unit that requires the evaluation signal. For example, the temperature detection signal is sent to the heating behavior calculation unit 52 and the heating control unit 53 as a temperature detection signal. The signals from the pressure-sensitive switch 82 and the position detection sensor 83 are compared with the reference ranges set for them, and when they are out of the reference ranges, a visual alarm or an audible alarm is given through the notification unit 57.

  The heating behavior calculation unit 52 includes a heating time calculation unit 521, a heating intensity calculation unit 522, and a behavior derivation table 523. The heating time calculation unit 521 calculates the heating time using the behavior derivation table 523 from the temperature detection signal including information on the surface temperature of the waterproof sheet 7 and the environmental temperature. The heating intensity calculator 522 calculates the heating intensity (induction heating intensity) from the temperature detection signal using the behavior derivation table 523. At that time, if the heating time is divided into unit times and the heating intensity is calculated for each unit time, a heating intensity curve over time can be obtained. A heating control command based on the heating intensity curve is transferred to the heating control unit 53. The heating control unit 53 gives a control signal to the power feeding unit 3 based on the received heating control command. Based on the received control signal, the power supply unit 3 controls the power electro circuit (inverter circuit, booster circuit, etc.) over time so that an appropriate heating behavior is realized in the fixture 70.

  After the induction heating is finished, the cooling control unit 54 gives a cooling control signal to the cooling fan unit 60, drives the cooling fan 61, cools the wearable pad 90 and the heating coil 40, and consequently the waterproof sheet 7 is removed. Cooling. During this cooling, by pressing the waterproof sheet 7 located above the fixture 70 via the mounting pad 90, the adhesive fixing between the fixture 70 and the waterproof sheet 7 is favorably promoted.

  In the memory device 55, work data related to adhesive fixing to each fixing tool 70 using induction heating is written. The data communication unit 56 is an optional function, and is used to receive internal data such as work data to the outside and data transmitted from the outside.

  FIG. 9 shows an ultra-small pistol type induction heating welding apparatus as another embodiment of the portable induction heating welding apparatus 100 according to the present invention. The housing 1 is a cylindrical body bent into an L shape, and a rechargeable battery 2 is disposed on one end side thereof, and an electromagnetic heating coil unit 4 is disposed on the other end side. A pressing pad 9 is mounted on the surface of the electromagnetic heating coil unit 4 that faces the welding object OB. A grip portion 190 having a shape that can be easily gripped with one hand is formed in an intermediate portion of the housing 1, and a trigger that functions as the operation switch 81 is provided at a position that can be easily operated with a finger of the hand that grips the grip portion 190. The control unit 5 is disposed inside the grip 190, and the power feeding unit 3 is disposed between the control unit 5 and the electromagnetic heating coil unit 4. A flat panel that functions as the notification unit 57 is provided around the grip unit 190, and various information can be displayed. Further, a detachable semiconductor memory card that functions as the memory device 55 is also mounted. Various other sensor / switch groups 8, a temperature detection unit 80, and a GPS unit 800 can also be provided. In order to enable one-handed operation, a lightweight and small high-performance battery is used as the battery 2, but the battery capacity is insufficient to continue the electromagnetic induction heating for a long time, so that the worker always has a plurality of spares. Bring the battery 2 and work while replacing the battery.

[Other Embodiments]
(1) In the above-described embodiment, the pressing pad 9 is configured as the shoe-shaped pressing pad 9 that is mounted so as to cover the disk portion 42 of the base 41 from the lower surface thereof. You may comprise from the pad frame attached to the lower end of the housing 1, and the cushion material fixed to this pad frame.

(2) In the portable induction heating welding apparatus 100 shown in FIG. 10, the upper surface of the disc part 42 is formed in a substantially flat surface, and functions as a surface on which the heating coil 40 is placed. The lower surface and the side surface of the disc part 42 are covered with a pressing pad 9 attached to the disc part 42 as a shoe-type attachment pad 90. In this alternative embodiment, a cooling passage 62 is formed in the base 41 in order to enhance the cooling effect of the cooling air on the base 41 by the cooling fan 61. The heating coils 40 are densely arranged on the upper surface of the disc portion 42, and smooth air circulation is hindered. For this reason, in the example shown in FIG. 10, the cooling air passing through the heating coil 40 as the cooling passage 62 effectively cools the disc portion 42. Is formed as a coil-side cooling passage 621.

(3) FIG. 11 shows a modification of the portable induction heating welding apparatus 100 shown in FIG. In this modified example, not only the coil-side cooling passage 621 but also a groove-like passage is formed as the object-side cooling passage 622 on the lower surface (pressing surface) of the disk portion 42 of the base 41 as the cooling passage 62. A communication passage 623 that penetrates from the upper surface to the lower surface of the disc portion 42 and connects the coil side cooling passage 621 and the object side cooling passage 622 is formed. As a result, the cooling air also flows between the disc portion 42 and the pressing pad 9, and the mounting pad 90 is forcibly cooled. As a result, the cooling effect on the waterproof sheet 7 is also increased, the adhesive is quickly solidified and firmly fixed, the temperature rise of the waterproof sheet 7 is prevented, and thermal deformation thereof is also prevented. Furthermore, although not shown in the drawings, a structure is provided in which a hole communicating with the coil side cooling passage 621 and the object side cooling passage 622 is provided in the mounting pad 90, and cooling air is discharged from the hole to cool the periphery. It may be adopted.

(4) The fan of the cooling fan unit 60 may be disposed not on the heating coil 40 but on the side. Further, an electronic cooling mechanism using a Peltier element or the like may be employed as the cooling mechanism 6 for cooling the disk portion 42. In this case, an advantage can be obtained in the disk portion 42 by directly using the electronic cooling mechanism. At that time, if the disk portion 42 is cooled by both the cooling fan unit 60 and the electronic cooling mechanism, the welded portion is further effectively cooled.

(5) In the above-described embodiment, the battery 2, the power feeding unit 3, and the control unit 5 are integrally assembled by the housing 1 with the electromagnetic heating coil unit 4 and the cooling fan unit 60. Instead of this, the battery 2 may be separated and separated from the housing 1 in which the electromagnetic heating coil unit 4 and the power feeding unit 3 are assembled, and connected from the battery 2 to the power feeding unit 3 using a cable. Furthermore, the battery 2 and the power feeding unit 3 may be integrated, and the power feeding unit 3 and the electromagnetic heating coil unit 4 may be connected by a cable. Moreover, in this invention, using a commercial power supply as a power supply part is not excluded.

(6) The base 41 may be attached to the housing 1 so as to allow swinging in one direction or all directions around the lateral swing axis by using a universal joint or the like. By adopting this configuration, the electromagnetic heating coil unit 4 and the pressing pad 9 can take a free angular attitude with respect to the housing 1 within a predetermined angle.

(7) Each functional unit of the control unit 5 shown in FIG. 8 is divided for convenience of explanation, and a plurality of arbitrary functional units may be integrated, or each functional unit may be further divided. May be.

  The present invention can be applied to a portable heating apparatus that heats and welds an object to be welded using magnetic induction heating.

100: Portable induction heating welding apparatus 1: Housing 2: Battery (power supply unit)
3: Power feeding part 4: Electromagnetic heating coil unit 40: Heating coil 41: Base 42: Disk part 43: Post part 44: Recess 45: Passing hole 5: Control unit 6: Cooling mechanism 60: Cooling fan unit 61: Cooling Fan 62: Cooling passage 621: Coil side cooling passage 622: Object side cooling passage 623: Communication passage 7: Waterproof sheet 70: Fixing tool 9: Press pad 90: Wearable pad 91: Press portion 92: Side wall portion 93: Ring Saddle OB: welding object

Claims (6)

A portable induction heating welding apparatus that heats and welds an object to be welded by electromagnetic induction,
A power supply,
An electromagnetic heating coil unit including a base having a holding surface facing the welding object and a heating coil;
A power feeding unit that supplies current to the electromagnetic heating coil unit using power from the power source unit;
A control unit for controlling the power feeding unit;
A pressing pad attached to the base so as to cover the pressing surface;
A portable induction heating welding apparatus provided with The power supply unit is composed of a rechargeable battery,
The portable induction heating welding apparatus according to claim 1, further comprising a housing for integrally attaching the battery, the electromagnetic heating coil unit, the power feeding unit, and the control unit.   The portable induction heating welding apparatus according to claim 1 or 2, further comprising a cooling mechanism for forcibly cooling the pressing pad.   The portable induction heating welding apparatus according to claim 3, wherein the cooling mechanism includes a cooling fan that generates cooling air, and a cooling passage is formed in which the cooling air cools the pressing pad.   The portable induction heating welding apparatus according to claim 4, wherein the cooling passage includes a pad-side cooling passage formed in the pressing pad.   The pad-side cooling passage has a groove-like passage formed in a groove shape on a surface facing the pressing surface of the pressing pad, and an outflow hole communicating with the groove-like passage and penetrating the pressing pad. The portable induction heating welding apparatus as described in 1.

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