JP7213543B2 - Induction welding equipment - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induction heating welding apparatus that welds an object to be welded by inductively heating the object to be welded and pressing the object to be welded.

In waterproofing work for building or civil engineering work, for example waterproofing work for flat roofs, etc., a conductive fixing member having a heat-sealing layer on the surface is fixed to the surface of the building frame, and the fixing member is attached from the surface side of the waterproof sheet stretched on the building frame. There is known a construction method in which a waterproof sheet is fixed on a building frame by induction heating and pressing the waterproof sheet against a fixing member. In this construction, the objects to be welded are the waterproof sheet and the fixing member.

For example, Patent Document 1 discloses an electromagnetic heating coil unit including a base having a pressing surface facing an object to be welded and a heating coil, a power supply unit that supplies current to the electromagnetic heating coil unit, and a An induction heat welding apparatus is disclosed that includes a pressure pad. In the adhesion and fixing work of the waterproof sheet using this induction heating welding device, the waterproof sheet is subjected to induction heating by the electromagnetic heating coil unit while maintaining the posture of contacting the pressing pad to the portion above the fixing member of the waterproof sheet. and the fixing member are welded together. The waterproof sheet and the fixing member are welded together by pressing the pressure pad against the fixing member while maintaining the posture for a while after the induction heating is completed.

JP 2016-110824 A

In the work of pressing an object to be welded using a pressure pad of an induction heating welding apparatus as disclosed in Patent Document 1, the pressing pressure is an important factor that determines the welding state of the object to be welded. For example, if the objects to be welded are a sheet material and a fixed member, if the pressing pressure is too small, the problem of insufficient welding of the objects to be welded arises.
In view of such circumstances, it is an object of the present invention to provide an induction heating welding apparatus that uses a built-in pressing pad to easily and properly perform the pressing operation.

The induction heating welding apparatus according to the present invention welds the objects to be welded by induction heating the objects to be welded and pressing the objects to be welded. This induction heating welding apparatus includes a heating coil for induction heating the object to be welded, a power supply section for supplying current to the heating coil, a housing for accommodating the heating coil and the power supply section, and a lower end portion of the housing. a pressing pad having a contact surface that contacts the object to be welded; a pressing operation tool displaced from a first position to a second position; and a spring force defined by the displacement of the pressing operation tool. A pressing spring is provided to press the pressing pad against the object to be welded.

According to this configuration, when the operator displaces the pressing operation tool from the first position to the second position during the induction heating of the object to be welded by the heating coil, after the induction heating, or both, the displacement causes the The pressing pad is pressed against the object to be welded with a defined spring force. By grasping the relationship between the displacement of the pressing tool and the spring force, the operator can easily press the object to be welded with more than an appropriate force via the spring and the pressing pad.

If there is a gap between the object to be welded and the contact surface of the pressing pad, the distance between the heating coil and the object to be welded (non-heated dielectric) is increased, resulting in insufficient heating. Therefore, it is preferable that the induction heating is started when the pressing operation tool is displaced and the pressing pad presses the object to be welded with a sufficient pressing force. For this reason. In one preferred embodiment of the present invention, a heating switch is provided that is turned ON by displacement of the pressing operation tool, and the heating switch outputs a start signal for starting power supply to the heating coil by the ON operation. do.

When the pressing pad presses the object to be welded, it is preferable that the pressing pressure due to the operation displacement of the pressing operation tool is generated on the contact surface of the pressing pad as uniformly as possible. Further, it is preferable that the induction heating is started when the contact state between the contact surface and the object to be welded becomes good by generating a pressing pressure of a predetermined level or more. In order to realize this, in one preferred embodiment of the present invention, the pressing operation tool is mounted on the upper end of the housing so as to be slidable along a vertical line of the contact surface, and the heating switch is attached to the housing so as to be switched from OFF to ON by contact with the pressing operation tool during sliding of the pressing operation tool.

In one preferred embodiment of the present invention, the pressing operation tool includes a slide rod penetrating a ceiling wall forming the upper end of the housing, a pressing cap provided on the upper end of the slide rod, and the slide. a switch actuating body provided at the lower end of the slide rod so as to turn on the heating switch as the rod is slid, wherein the pressing spring is arranged between the pressing cap and the ceiling wall. ing. With this configuration, the top wall of the housing is used as a guide member for the displacement operation of the pressing operation tool, enabling stable pressing operation. In addition, since the press cap manually operated by the operator is arranged in a free space away from the housing upward, the operability is excellent, and a stable posture is ensured so that the contact surface of the press pad can be placed on the object to be welded. can be pushed. Furthermore, since the heating switch and the pressure spring are arranged in the housing covered by the top wall, malfunction due to accidental contact or dust can be prevented.

When the object to be welded consists of a fixed member to be heated and a sheet member covering the fixed member, it is difficult to visually recognize the fixed member from above the sheet member. Proper induction heating becomes impossible when the heating coil deviates from the proper position with respect to the member to be heated. Therefore, it is preferable to detect the position of the member to be heated using a sensor coil. The detection coil needs to be arranged at a position where the detection accuracy of the detection coil is unlikely to be degraded by the heating coil. However, the farther the detection coil is placed from the heating coil, the larger the size of the induction heating welding apparatus, which is an obstacle to making the induction heating welding apparatus more compact. For this reason, in one preferred embodiment of the present invention, a positional deviation detection coil for detecting a positional deviation between the object to be welded and the heating coil is arranged between the pressing pad and the heating coil. there is In this configuration, the detection coil is arranged at a position closer to the object to be welded than the heating coil, so the effect of the heating coil on the detection of the object to be welded by the detection coil is reduced.

If the detection coil itself is displaced, the position detection accuracy with respect to the object to be welded decreases, so the detection coil must be held accurately and stably. For this reason, in one preferred embodiment of the present invention, the detection coil is fitted in a recess formed in the lower surface of a resin plate, and the resin plate is positioned between the heating coil and the pressing pad. located at the lower end of the housing. With this configuration, the movement of the detection coil is restricted by the wall surface forming the concave portion of the resin plate, so that the detection coil can be held in a predetermined posture. At that time, when the resin plate is mounted so that the lower surface of the resin plate is in contact with the upper surface of the pressing pad, the detection coil is surrounded by the wall surface forming the recess and the upper surface of the pressing pad. Remain stable.

FIG. 2 is a perspective view showing a heat welding management device, an induction heat welding device, a waterproof sheet, and a fixing member; 1 is a longitudinal sectional view of an induction heating welding device; FIG. FIG. 4 is a vertical cross-sectional view of the induction heating welding device in the skirt unit area, the right side of the center line is a longitudinal cross-sectional view cut along a plane passing through the resistance spring, and the left side of the central axis is a longitudinal cross-sectional view cut along a plane passing through the locking pin. 1 is a vertical cross-sectional view; FIG. It is a top view of a resin plate. FIG. 3 is a plan view showing the positional relationship among a resin plate, a heating coil, a positional deviation detection coil, and ferrite; It is a top view of a skirt unit. It is a side view of a skirt unit. 3 is a functional block diagram showing control functions provided in a heat welding management device and an induction heat welding device; FIG.

In this specification, "top, top, top" or "bottom, bottom, bottom" refers to the positional relationship in the longitudinal axis direction (vertical direction) of the device body, and the height from the object to be welded. showing relationships.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an induction heating welding apparatus 2 that welds objects to be welded by inductively heating the objects to be welded and pressing the objects to be welded. In the induction heating welding device 2 according to this embodiment, the functional part for managing the heating welding work is configured separately as the heating welding management device 1, and the heating welding management device 1 and the induction heating welding device 2 are connected to the power line. are connected by a connection cable CA including a control line. Of course, the functions of the heat welding management device 1 may be incorporated into the induction heat welding device 2 so that the induction heat welding device 2 alone can perform the heat welding work.

The heat welding management device 1 includes a power supply unit 11, a GNSS unit 12, a data logger unit 13, an environmental temperature detection unit 14, an operation panel 15, a display panel 16, and the like. The power supply unit 11 receives a commercial power supply or an in-house power generator, and outputs AC power necessary for induction heating to the induction heating welding apparatus 2 . The GNSS unit 12 uses a satellite positioning system to calculate the location coordinates of the heat weld location. Since the position coordinates calculated by this are the positions of the antenna (not shown), only the antenna may be provided in the heat welding management device 1 . The data logger unit 13 stores the positional coordinates of each heat welding location as well as the data of the heat welding work performed there (working environment temperature, working date and time, heating intensity, heating time, position of the induction heating welding device 2 and the object to be welded). deviation, temperature of the object to be welded, etc.) are recorded. The environment temperature detection unit 14 detects the work environment temperature. Various operation buttons, operation switches, and various notification lamps are arranged on the operation panel 15 . The display panel 16 is a liquid crystal display for visually notifying the operator of information.

FIG. 1 shows how the induction heating welding apparatus 2 welds a waterproof sheet SH to a fixing member FX fixed to a waterproof foundation made of concrete on a rooftop or the like with an anchor or the like. In this embodiment, the objects to be welded are the fixing member FX and the portion of the waterproof sheet SH covering the fixing member FX. The fixing member FX here is a circular conductor, and is made of, for example, a steel plate. A planar hot-melt adhesive layer made of a thermoplastic synthetic resin such as a polyester resin is formed as a thermal adhesive layer for the waterproof sheet SH on the upper surface of the fixing member FX. The fixing members FX are arranged on the slab body at a large number of fixing points spaced vertically and horizontally at predetermined intervals. The worker welds the waterproof sheet SH to the fixing member FX by induction heating the fixing member FX while pressing the upper surface of the fixing member FX with the waterproof sheet SH sandwiched therebetween using the induction heating welding device 2 .

As shown in FIG. 2, the induction heating welding apparatus 2 includes a heating coil 6 that induction-heats the fixing member FX, a power supply unit 61 that supplies the heating coil 6 with current sent from the power supply unit 11, and the heating coil 6. and a housing 20 that accommodates the power supply unit 61 .

The housing 20 has a cylindrical body portion 21 having a central axis CL, an upper end portion 22 connected to the upper end of the body portion 21 , and a lower end portion 23 connected to the lower end of the body portion 21 . A side wall of the body portion 21 is formed with a second connector box 19b to which the connection cable CA is connected. The top end 22 is a top wall that closes the top of the housing 20 . An upper housing chamber 22a is formed on the lower surface side of the upper end portion 22, and an annular protrusion 22b is formed on the upper surface side of the upper end portion 22. As shown in FIG. A lower end 23 is a bottom wall that closes the lower portion of the housing 20 . A lower storage chamber 23a is formed on the upper surface side of the lower end portion 23, and a circular bottom concave portion 23b is formed on the lower surface side of the lower end portion 23. As shown in FIG. A rotatable handle 24 is provided on the peripheral wall of the upper end portion 22 .

As shown in FIG. 3 , the heating coil 6 is a coil wound flat and thin around the central axis CL, and is housed in the bottom concave portion 23 b of the lower end portion 23 . The heating coil 6 is sandwiched between a thin resin plate 64 attached to the end surface 23c of the lower end portion 23 and a ferrite 65 and held in the bottom recessed portion 23b. The resin plate 64 is mounted so as to be flush with the end face 23c, and the pressing pad 5 made of silicon rubber is mounted on that face. That is, the lower surface of the pressing pad 5 is also the lower surface of the induction heating welding device 2, and serves as the contact surface 50 that can contact the waterproof sheet SH positioned above the fixing member FX. A heating coil 6 and a ferrite 65 are arranged above the pressing pad 5 with a resin plate 64 interposed therebetween.

The resin plate 64 is, as shown in FIG. 4, a disk having four circular recesses 640 distributed at circumferential angles of 90 degrees. A circular misalignment detection coil 63 that functions as a misalignment sensor is arranged in each circular recess 640 . A wiring groove 641 connected to each circular concave portion 640 is formed for the detection signal wiring of the misalignment detection coil 63 .

The pressing force during heating is transmitted to the heating coil 6 via the lower surface of the lower end portion 23 and the ferrite 65 , and is also transmitted to the resin plate 64 and the displacement detection coil 63 .

The inner diameter of the circular concave portion 640 is set to be slightly larger than the outer diameter of the misalignment detection coil 63 . This facilitates the work of attaching the detection coil 63 to the circular recess 640 . Further, when the pressing force is applied to the detection coil 63, the detection coil 63 is allowed to expand outward a little, and is restricted from expanding more than a predetermined amount. As a result, the detection coil 63 is held in a proper posture during the induction heating welding operation. Furthermore, the depth of the circular recess 640 is set to be smaller than or substantially the same as the thickness of the misalignment detection coil 63 . As a result, when a pressing force acts on the detecting coil 63 , deformation of the detecting coil 63 in the direction in which the pressing force acts is restricted, and the pressing force acts evenly on the entire surface of the detecting coil 63 . This also contributes to keeping the detection coil 63 in an appropriate posture during the induction heating welding operation.

As shown in FIG. 5, the ferrite 65 has a rectangular parallelepiped shape in plan view, and is arranged to extend in the radial direction of the positional deviation detection coils 63 above the respective positional deviation detection coils 63 with the heating coil 6 interposed therebetween. It is

As shown in FIG. 2 , inside the body portion 21 of the housing 20 , a power feeding portion 61 and a positional deviation calculating portion 62 are accommodated. The power feeding unit 61 feeds the heating coil 6 with AC power sent through the connection cable CA and the second connector box 19b at a predetermined timing. The positional deviation calculator 62 uses the detection signals from the four positional deviation detection coils 63 to determine whether the central axis CL of the induction heating welding device 2 is aligned with the center of the fixing member FX. A degree of displacement with respect to the member FX is calculated. The determination result by the positional deviation calculator 62 is displayed on the display panel 16 provided on the upper surface of the second connector box 19b. In this embodiment, the display panel 16 includes a notification lamp for notifying misalignment. This misalignment notification lamp is lit so as to guide the heating coil 6 directly above the fixing member FX. If the heating coil 6 is displaced with respect to the fixing member FX, an error lamp indicating the direction of the displacement is lit, and if the heating coil 6 is not displaced with respect to the fixing member FX, the OK lamp lighting control may be used.

As shown in FIG. 2, the pressing operation tool 3 is attached to the upper end portion 22 of the housing 20 . The operator can use this pressing operation tool 3 to apply a strong pressing force to the pressing pad 5 which is in contact with the waterproof sheet SH on the fixing member FX.

The pressing operation tool 3 includes a pressing cap 31 , a slide rod 32 and a switch operating body 33 . The slide rod 32 passes through the ceiling wall forming the upper end portion 22 coaxially with the central axis CL. A pressing cap 31 is provided at the upper end of the slide rod 32 . The upper surface of the press cap 31 is curved like an arch so that it can be easily operated with the palm of the operator's hand. An annular hole 31a is formed in the lower surface of the pressing cap 31 to allow the annular projection 22b of the upper end portion 22 to advance and retreat. As a result, when the pressure cap 31 is slidably displaced from the upper first position to the lower second position while being guided by the annular projection 22b and the annular hole 31a, the slide rod 32 is also interlocked. down. The switch operating body 33 is provided at the lower end of the slide rod 32 inside the upper housing chamber 22a. The switch actuating body 33 is a disc with a chamfered lower peripheral edge.

A pressure spring 30 is arranged between the lower surface of the pressure cap 31 and the top wall forming the upper end portion 22 . In FIG. 2, the pressure spring 30 is arranged to surround the slide rod 32, but instead is arranged in an annular hole 31a so that the spring pressure acts on the pressure cap 31 near the outer periphery. may The pressing spring 30 is set to urge the upward displacement (displacement to the first position) of the pressing cap 31 . Conversely, the pressing spring 30 is set to oppose the downward displacement (displacement to the second position) of the pressing cap 31 . With this configuration, when an operator displaces the pressing cap 31 downward and holds the pressing cap 31 at a predetermined displaced position, the compressed pressing spring 30 has a spring force defined according to the spring displacement. to press the pressing pad 5 against the waterproof sheet SH. As a result, the waterproof sheet SH is in close contact with the fixing member FX. The pressing cap 31 is held at a position (first position) where a stopper 32 a provided on the slide rod 32 contacts the upper end portion 22 in a natural state due to the biasing force of the pressing spring 30 .

Inside the upper storage chamber 22a, a heating switch 34, which is a microswitch that is turned on and off, is further provided. The heating switch 34 is connected to the power supply section 61 . Due to the sliding displacement of the pressing cap 31 from the first position to the second position, the switch actuating body 33 is also lowered, and in the middle of the sliding displacement, it comes into contact with the lever of the heating switch 34 and the heating switch 34 is turned on. Since the ON signal of the heating switch 34 serves as a start signal for power feeding by the power feeding section 61 , the power feeding section 61 receives the ON signal and supplies a predetermined alternating current to the heating coil 6 . Thereby, induction heating of the fixed member FX by the heating coil 6 is started.

The induction heating welding apparatus 2 includes a non-contact temperature sensor 7 (for example, an infrared type) for detecting the surface temperature of the waterproof sheet SH, and a temperature measuring device for calculating the surface temperature based on the detection signal of the temperature sensor 7. A circuit 70 is provided. The temperature sensor 7 and the temperature measurement circuit 70 should be placed as far away from the heating coil 6 as possible so as to avoid signal interference due to excitation of the heating coil 6 . Therefore, the infrared passage formed between the temperature sensor 7 and the waterproof sheet SH becomes long. In order to secure this infrared passage, the housing 20 is provided with a first through-hole 23d (see FIG. 2) in the lower end portion 23, and the resin plate 64 is provided with a second through-hole 642 (see FIG. 4). 5 is provided with a third through hole 51 (see FIG. 2). Further, the heating coil 6 is divided into an inner coil portion and an outer coil portion, as shown in FIG. A gap SP is formed between the inner coil portion and the outer coil portion by widening the interval. With this structure, an infrared passage for the temperature sensor 7 is created by the first through hole 23d, the gap SP, the second through hole 642, and the third through hole 51 (see dashed-dotted arrows in FIG. 2). Surface temperature data measured by the temperature measurement circuit 70 is sent to the power supply section 61 and the data logger unit 13 of the heat welding management device 1 .

A skirt unit 8 is provided at the lower end 23 of the housing 20, as shown in FIG. The inner peripheral shape of the skirt unit 8 substantially matches the outer peripheral dimension of the fixing member FX including the waterproof sheet SH. When the tip of the skirt unit 8 is fitted to the fixing member FX covered with the waterproof sheet SH, the contact surface 50 of the pressing pad 5 is appropriately positioned above the fixing member FX. In this embodiment, the outer contours of the abutment surface 50 and the fixing member FX are circles of substantially the same size.

The skirt unit 8 has a skirt body 81 . The skirt body 81 is a cylindrical body mounted on the outer peripheral surface of the lower end portion 23 so as to be slidable along a vertical line (coinciding with the central axis CL) passing through the center of the contact surface 50 . The inner diameter of the skirt body 81 is the sum of the outer diameter of the fixing member FX and the length two to three times the thickness of the waterproof sheet SH. The skirt body 81, the pressing pad 5, and the heating coil 6 are arranged coaxially with respect to the central axis CL. Accordingly, when the tip of the skirt body 81 is fitted to the fixing member FX with the waterproof sheet SH interposed therebetween, the center of the fixing member FX, the center of the skirt body 81, and further the centers of the pressing pad 5 and the heating coil 6 are substantially aligned. match. The posture of the induction heating welding device 2 at this time is an appropriate position for induction heating the fixing member FX.

As shown in FIG. 3, when the heating coil 6 and the fixing member FX are aligned, when the skirt unit 8 is further pressed downward, the skirt body 81 moves along the central axis CL. 3), and the contact surface 50 of the pressing pad 5 comes into close contact with the surface of the waterproof sheet SH. The sliding stroke ST of the skirt body 81 is such that the position where the lower end of the skirt body 81 protrudes from the contact surface 50 by a predetermined length (several mm to ten-odd mm) and the lower end of the skirt body 81 substantially coincide with the contact surface 50 . It becomes the length between the positions. If the skirt body 81 slides upward with a light force, the skirt body 81 cannot be positioned by fitting the fixing member FX shallowly. A means of providing resistance is required. In this embodiment, this resistance means is constituted by a resistance spring 80 arranged between the lower end 23 and the skirt body 81 . More specifically, resistance spring 80 is an elongated coil spring. A pneumatic spring or a fluid pressure spring may be used as the resistance means.

As shown in FIGS. 3 and 6, one end of the resistance spring 80 is inserted into a vertical hole 82 formed in the skirt body 81 and functioning as a spring receiving portion. is in contact with the lower surface of a collar portion 23e formed on the peripheral wall of the. As a result, spring resistance acts against upward sliding of the skirt body 81 .

As a result of experiments, it has been found that a spring force of 1 N/cm 2 or more is suitable as the spring force.

As shown in FIGS. 3, 6 and 7, the skirt body 81 is formed with a J-shaped pin guide groove 84 that opens at the upper end of the skirt body 81 . Further, a locking pin 83 is radially screwed into the peripheral wall of the lower end portion 23 . The width of the pin guide groove 84 is such that the locking pin 83 can be inserted. In FIG. 3, a longitudinal section cut along a plane passing through the resistance spring 80 is shown on the right side of the central axis CL, and a longitudinal section cut along a plane passing through the locking pin 83 is shown on the left side of the central axis CL. It is shown. The pin guide groove 84 has a first groove 841 that opens at the upper end of the skirt body 81 and extends in the axial direction, a second groove 842 that connects with the first groove 841 and extends in the circumferential direction, and a second groove 842 that connects with the second groove 842 . and a third groove 843 extending in the axial direction. The head of the locking pin 83 enters from the opening of the first groove 841 . The skirt body 81 slides upward under the guidance of the locking pin 83 and the first groove 841 . Furthermore, the skirt body 81 is turned so that the locking pin 83 moves from the lower end of the first groove 841 to the second groove 842 . When the locking pin 83 enters the third groove 843 , the skirt body 81 is biased downward by the resistance spring 80 . The downward sliding of body 81 is restricted. In other words, the locking pin 83 and the upper end of the third groove 843 function as a locking tool that limits the projecting length of the skirt body 81 downward from the pressing pad 5 to a predetermined value.

The spring force of the resistance spring 80 serves as resistance force when the skirt body 81 is slid upward. The spring force of the pressing spring 30 is the pressing force generated by the operation of the pressing cap 31 . Therefore, if the spring force of the resistance spring 80 is greater than the spring force of the pressing spring 30, the skirt body 81 will not apply the pressing force set by the pressing spring 30 when the pressing pad 5 and the heating coil 6 are aligned. The waterproof sheet SH is pressed by the force exceeding the pressure. This leads to deformation of the waterproof sheet SH. Therefore, the spring force of the resistance spring 80 in the direction of the central axis CL is set weaker than the spring force of the pressing spring 30 in the direction of the central axis CL.

As shown in FIG. 8, the heat welding management device 1 is provided with a first control unit 10a that controls the heat welding process on the heat welding management device 1 side. The first control unit 10a is connected to the power supply unit 11, GNSS unit 12, data logger unit 13, environmental temperature detection unit 14, operation panel 15, and display panel 16 described above.

The induction heating welding device 2 is provided with a second control unit 10b for controlling the heating welding process on the induction heating welding device 2 side. The second control unit 10b is connected to the power supply section 61, the heating switch 34, the positional deviation calculator 62, the positional deviation display panel 66, and the temperature measurement circuit 70 described above.

Electric power for induction heating is sent from the heat welding management device 1 to the induction heat welding device 2 , and induction heating data and various signals are sent from the induction heat welding device 2 to the heat welding management device 1 . For the input and output of power, data, and signals, the heat welding management apparatus 1 is provided with a first connector box 19a, and the induction heat welding apparatus 2 is provided with a second connector box 19b. The first connector box 19 a is connected to the first control unit 10 a and power supply unit 11 , and the second connector box 19 b is connected to the second control unit 10 b and power supply section 61 . A connection cable CA connects between the first connector box 19a and the second connector box 19b.

Induction heating of the fixing member FX is performed by supplying power generated by the power supply unit 11 to the heating coil 6 by the power supply unit 61 . The power supply unit 11 converts AC power from a commercial power supply into induction heating power based on a control command from the first control unit 10a. The power specification for induction heating is calculated based on the thickness of the waterproof sheet SH and the environmental temperature detected by the environmental temperature detection unit 14, which are input through the operation panel 15. FIG.

Electric power for induction heating is sent to the power supply section 61 via the first connector box 19a, the connection cable CA, and the second connector box 19b. The power supply unit 61 supplies induction heating power to the heating coil 6 in response to the ON operation of the heating switch 34 . The timing of stopping the induction heating, that is, the timing of stopping the power supply to the heating coil 6, is determined by a preset heating time. may be adjusted.

When entrusting the determination of the power supply stop timing to the operator, the timing at which the heating switch 34 is switched from ON to OFF is used. When the operator releases pressure on the pressing cap 31 and slides the pressing cap 31 back to the first position, the contact between the switch operating body 33 and the lever of the heating switch 34 is released, and the heating switch 34 is closed. It switches from ON to OFF.

The second control unit 10b sends to the data logger unit 13 the supply time data of the power for induction heating, the data indicating the state of the heating switch 34, the measurement result data of the temperature measurement circuit 70, and the like. The first control unit 10 a sends the positioning data from the GNSS unit 12 , the environmental temperature data from the environmental temperature detection unit 14 , the specification data of the power for induction heating generated by the power supply unit 11 , and the like to the data logger unit 13 . The data logger unit 13 records the received data in a predetermined format in memory for each induction heating point. The second control unit 10b can generate various error data (for example, coil error, coil abnormally high temperature, voltage error, sensor failure, seat abnormally high temperature, etc.), and these error data are sent to the first control unit 10a. and displayed on the display panel 16 as appropriate. Additionally, the error data is also sent to the data logger unit 13 and stored with the positioning data.

[Another embodiment]
(1) In the above-described embodiment, the device for induction heat welding of objects to be welded is divided into the heat welding management device 1 and the induction heat welding device 2 . Alternatively, the heat welding management device 1 may be incorporated into the induction heat welding device 2 . At least one functional part of the induction heating welding device 2 in the above-described embodiment may be transferred to the heating welding management device 1, or conversely, at least one functional part of the heating welding management device 1 may be transferred to the induction heating welding device. You can move to 2.

(2) In the above-described embodiment, the objects to be welded are the fixing member FX and the waterproof sheet SH to be welded to the fixing member FX. It may be combined with a body to be welded.

(3) In the above-described embodiment, induction heating is started by turning on the heating switch 34 by pushing down the pressing cap 31 . Alternatively, ON/OFF of the heating switch 34 may be used to confirm the pressing force on the pressing pad 5, and initiation of induction heating may be performed by another operation tool.

(4) Each functional unit shown in FIG. 8 is divided for convenience of explanation, and arbitrary plural functional units may be integrated or each functional unit may be further divided.

(5) In the above-described embodiment, the fixing member FX is fixed to the concrete waterproof substrate. In addition to the concrete slab, the fixing member FX may be fixed to a precast concrete base or a waterproof base made of a different material such as metal. Moreover, the waterproof substrate to which the fixing member FX is fixed may be a vertical surface such as a vertical wall or an inclined surface other than the horizontal surface.

(6) The fixing member FX may have a shape other than a circle, such as a rectangle or a square. The material of the fixing member FX may be other than the steel plate.

(7) The temperature sensor 7 may be a contact sensor such as a bimetal sensor or a thermistor sensor instead of a non-contact sensor.

(8) In the above-described embodiment, the objects to be welded by the induction heating welding apparatus are the fixing member FX and the waterproof sheet, but the objects to be welded may be other objects.

INDUSTRIAL APPLICABILITY The present invention is applicable to an induction heating welding apparatus that welds objects to be welded by induction heating and pressing the objects to be welded.

2: Induction heating welding device 20: Housing 3: Pressing operation tool 30: Pressing spring 31: Pressing cap 32: Slide rod 33: Switch operating body 34: Heating switch 5: Pressing pad 50: Contact surface 6: Heating coil 61: Power supply Part 62 : Positional deviation calculator 63 : Positional deviation detection coil 64 : Resin plate 7 : Temperature sensor 70 : Temperature measurement circuit 8 : Skirt unit 80 : Resistance spring 81 : Skirt body 82 : Spring receiving part CL : Center axis FX : Fixed Material SH: waterproof sheet

Claims (7)

An induction heating welding apparatus for welding the welding target by inductively heating the welding target and pressing the welding target,
a heating coil that induction-heats the object to be welded;
a power supply unit that supplies current to the heating coil;
a housing that houses the heating coil and the power supply;
a pressing pad attached to the lower end of the housing and having a contact surface that contacts the object to be welded;
a pressing operation tool displaced from a first position to a second position;
a pressing spring that presses the pressing pad against the object to be welded with a spring force defined by the displacement of the pressing operation tool;
Induction heating welding device with. 2. The induction heating welding apparatus according to claim 1, further comprising a heating switch that is turned on by displacement of said pressing operation tool, and said heating switch outputs a start signal for starting power supply to said heating coil when said heating switch is turned on. The pressing operation tool is attached to the upper end of the housing so as to be slidable along the vertical line of the contact surface, and the heating switch contacts the pressing operation tool while the pressing operation tool is sliding. 3. The induction heating welding device of claim 2, mounted on said housing so as to be switched from OFF to ON by a. The pressing operation tool includes a slide rod penetrating a top wall forming the upper end of the housing, a pressing cap provided at the upper end of the slide rod, and turning on the heating switch as the slide rod is slid. a switch actuating body operably provided at the lower end of the slide rod;
4. The induction heating welding device according to claim 2, wherein the pressing spring is arranged between the pressing cap and the top wall. 5. The induction according to any one of claims 1 to 4, wherein a positional deviation detection coil for detecting a positional deviation between the object to be welded and the heating coil is arranged between the pressing pad and the heating coil. Heat welding equipment. The displacement detection coil is fitted in a recess formed in the lower surface of a resin plate, and the resin plate is attached to the lower end of the housing so as to be positioned between the heating coil and the pressing pad. The induction heating welding device according to claim 5. 7. The induction heating welding device according to claim 6, wherein the lower surface of said resin plate is in contact with the upper surface of said pressing pad.

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