JP7417317B2 - induction heating welding equipment - Google Patents

Description

The present invention provides induction heating welding that welds the sheet material and the conductive member by inductively heating the conductive member covered with the sheet material from the upper surface of the sheet material and pressing the sheet material and the conductive member. Regarding equipment.

In waterproofing work for construction work or civil engineering work, for example waterproofing work for flat roofs, etc., a conductive fixing member with a heat-welded layer on the surface is fixed to the surface of the structure, and the fixing member is applied from the surface side of the waterproof sheet stretched over the structure. It is known that a waterproof sheet is adhesively fixed onto a building frame by induction heating and pressing the waterproof sheet against a fixing member. The waterproof sheet and the fixing member in this construction are the sheet material and the conductive member as objects to be welded by the induction heating welding device.

In the above construction, an induction heating device for inductively heating the fixing member from the surface side of the waterproof sheet and a pressing device for pressing the waterproof sheet against the fixing member after induction heating the fixing member are prepared. Therefore, each time the induction heating using the induction heating device is completed, the operator needs to switch the induction heating device to a pressing device and perform the pressing operation. In order to eliminate such troublesomeness of switching between the two devices, a device that integrates an induction heating device and a pressing device has been proposed.

For example, Patent Document 1 discloses an electromagnetic heating coil unit that includes a base having a holding surface facing the welding target and a heating coil, a power supply section that supplies current to the electromagnetic heating coil unit, and an electromagnetic heating coil unit that is attached to the base. An induction heating welding apparatus is disclosed that includes a pressure pad. When adhesively fixing a waterproof sheet using this induction heating welding device, the waterproof sheet is heated by induction using an electromagnetic heating coil unit while keeping the pressure pad in contact with the top of the fixing member of the waterproof sheet. and the fixing member are welded together. Even after the induction heating ends, the waterproof sheet and the fixing member are welded by pressing the press pad against the fixing member while maintaining the same posture for a while.

Japanese Patent Application Publication No. 2016-110824

In heat welding using an induction heat welding apparatus such as that disclosed in Patent Document 1, the positioning of the heating coil and the pressing pad with respect to the conductive member improves the heat welding between the sheet material and the conductive member. is important. If the heating coil and the pressing pad are displaced from the fixing member, not only will induction heating be insufficient, but also the sheet material will not be pressed sufficiently against the conductive member, resulting in poor quality of heat welding. However, since the conductive member is covered with the sheet material, the outline of the conductive member cannot be visually confirmed from the sheet material side. Therefore, it is necessary to check the external contour of the conductive member by feeling, which leads to deterioration of work efficiency.

In view of these circumstances, an object of the present invention is to provide an induction heating welding device incorporating a heating coil and a pressing pad, in which the pressing pad and the heating coil can be easily and accurately aligned with the external contour of the conductive member. The goal is to provide a device that can.

The induction heating welding apparatus according to the present invention inductively heats the conductive member covered with the sheet material from the upper surface of the sheet material and presses the sheet material and the conductive member to bond the sheet material and the conductive member together. Weld. This induction heating welding device includes a heating coil that inductively heats the conductive member , a housing that houses the heating coil , and a contact surface that is attached to the lower end of the housing and that can come into contact with the sheet material. The pressing pad has an inner peripheral shape that can follow the outer contour of the conductive member while sandwiching the sheet material, and is attached to the lower end of the housing so as to be slidable along the vertical line of the contact surface. and a skirt unit.

According to this configuration, the operator uses the skirt unit to find the position of the conductive member from above the sheet material, and then moves the skirt unit 8 to follow the outline of the conductive member while sandwiching the sheet material. When the skirt unit follows the outline of the conductive member, it is determined that the positional relationship of the pressing pad and the heating coil with respect to the conductive member is appropriate. When the skirt unit accurately follows the external contour of the conductive member, the skirt unit slightly fits the tip of the conductive member while sandwiching the sheet material. At this time, since the skirt unit can slide along the vertical line of the contact surface of the pressing pad, the skirt unit can slide upward against the housing without the conductive member being deeply fitted onto the outside of the skirt unit. do. This prevents the sheet material sandwiched by the skirt unit from being deformed or damaged. As the skirt unit slides upward, the contact surface of the pressing pad comes into contact with the sheet material. After that, the operator can press the sheet material and the conductive member via the pressing pad.

In one of the preferred embodiments of the present invention, the skirt unit includes a skirt body that slidably fits onto the side wall of the lower end portion, and a resistance means that provides a resistance force against upward sliding of the skirt body. It is equipped with Since the skirt body fits around the side wall of the lower end, stable sliding is possible. In addition, since a resistance force acts against the upward sliding of the skirt body, when the worker attempts to make the tip of the skirt body follow the external contour of the conductive member, the skirt body easily slides upward. This solves the problem of the worker being unable to accurately follow the contour of the conductive member with the skirt body. The resistance force of the resistance means is set so that the skirt body can easily follow the external contour. A resistance spring, which does not require a large installation space, is advantageous as a resistance means that allows the desired resistance force to be easily set.

Providing a resistance force against upward sliding of the skirt body by a resistance means such as a resistance spring means, conversely, that a biasing force is acting on the skirt body to cause it to slide downward. . If the skirt body is biased downward, when the induction heating welding device is lifted, the skirt body will fall off from the lower end. However, since the skirt body slightly protrudes from the pressing pad, the work of following the external contour of the conductive member can be smoothly performed. Therefore, in one of the preferred embodiments of the present invention, a locking device is provided that limits the length of the skirt body protruding from the pressing pad to the sheet material to a predetermined value.

Many conductive members used for fixing waterproof sheets and the like are disk-shaped. Further, even if the conductive member has a polygonal shape other than a circle, if the tip of the skirt body is cylindrical, the tip of the skirt body can be made to follow the external contour of the conductive member. Furthermore, it is electromagnetically effective to wind the heating coil in a circular shape. Therefore, in one of the preferred embodiments of the present invention, the heating coil is wound in a circular shape, the lower end of the housing is cylindrical, and the pressing pad is arranged on the end surface of the lower end. The skirt body has a cylindrical shape, and the lower end of the housing, the heating coil, the pressing pad, and the skirt body are coaxially arranged with the vertical line as a central axis. Due to this coaxial arrangement, when the tip of the skirt body is fitted into the conductive member, the conductive member, the skirt body, the pressing pad, and the heating coil overlap along the vertical line. In other words, the position of the induction heating welding device at this time is the appropriate position for the pressing pad and heating coil relative to the conductive member.

In one of the preferred embodiments of the present invention, a pressing operation tool is displaceable along a vertical line of the contact surface, and a spring force defined by the displacement of the pressing operation tool is used to move the pressing pad to the sheet material. A pressure spring is provided for pressing the resistor, and the resistance force of the resistance means in the direction of the vertical line is set to be weaker than the spring force of the pressure spring in the direction of the vertical line. In this configuration, the spring force of the pressing spring, which is the pressing force generated by the operation of the pressing operation tool, and the resistance force created by the resistance means when the skirt body is slid upward are the central axis ( This is the force that acts along the vertical line of the contact surface. Therefore, if the resistance force of the resistance means is larger than the spring force of the pressing spring, the skirt body will sandwich the sheet material and fit over the tip of the conductive member during positioning, and when the pressing pad is brought into contact with the sheet material, the pressing force will be lowered. The skirt body presses against the sheet material with a force that exceeds the pressing force set by the spring, and the depth at which the skirt body fits outward increases. This causes deformation of the sheet material. Therefore, it is preferable that the resistance force of the resistance means in the direction of the center axis is set to be weaker than the spring force of the pressing spring in the direction of the center axis.

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

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 main body, and refers to the height from the object to be welded. It shows a relationship.

Embodiments of the present invention will be described below based on the drawings. As shown in FIG. 1, in this embodiment, the conductive member is a circular conductor that is fixed at predetermined intervals to a concrete waterproof base on a rooftop or the like using anchors or the like. It is configured. This circular conductor is hereinafter referred to as a fixing member FX. The sheet material is a waterproof sheet SH that is welded to the fixing member FX while covering the fixing member FX. A planar hot melt adhesive layer made of a thermoplastic synthetic resin such as polyester resin is formed on the upper surface of the fixing member FX as a heat welding layer for the waterproof sheet SH.

Using the induction heating welding device 2, the worker applies induction heating to the fixing member FX covered with the waterproof sheet SH from the top surface of the waterproof sheet SH, and at the same time presses the waterproof sheet SH and the fixing member FX material to waterproof the fixing member FX. The sheet SH and the fixing member FX are welded together.

In the induction heating welding device 2 according to this embodiment, the functional unit 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 a power line. It is 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 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 outputs AC power necessary for induction heating to the induction heating welding apparatus 2 using a commercial power source or a private power generator as an input. The GNSS unit 12 calculates the position coordinates of the heat welding location using a satellite positioning system. Since the position coordinates thus calculated are the positions of the antennas (not shown), only the antennas 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 data on the heat welding work performed there (work environment temperature, work date and time, heating intensity, heating time, position of the induction heat welding device 2 and the object to be welded). record the deviation, temperature of the welding object, etc.). The environmental temperature detection unit 14 detects the working environment temperature. The operation panel 15 includes various operation buttons, operation switches, and various notification lamps. The display panel 16 is a liquid crystal display for visually informing the operator of information.

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

The housing 20 has a cylindrical body part 21 having a central axis CL, an upper end part 22 connected to the upper end of the body part 21, and a lower end part 23 connected to the lower end of the body part 21. A second connector box 19b to which the connection cable CA is connected is formed on the side wall of the body portion 21. The upper end portion 22 is a ceiling wall that closes off the upper portion of the housing 20. An upper storage chamber 22a is formed on the lower surface side of the upper end portion 22, and an annular projection 22b is formed upward on the upper surface side of the upper end portion 22. The lower end portion 23 is a bottom wall that closes off the lower portion of the housing 20 . A lower storage chamber 23 a is formed on the upper surface side of the lower end portion 23 , and a circular bottom recess 23 b is formed on the lower surface side of the lower end portion 23 . A rotating 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 thin, flat coil wound around the central axis CL, and is housed in the bottom recess 23b of the lower end portion 23. The heating coil 6 is held in the bottom recess 23b while being sandwiched between a thin resin plate 64 and a ferrite 65 attached to the end surface 23c of the lower end 23. The resin plate 64 is attached so as to be flush with the end surface 23c, and the pressure pad 5 made of silicone rubber is attached to that surface. That is, the lower surface of the pressing pad 5 is also the lower surface of this induction heating welding device 2, and serves as a contact surface 50 that can come into contact with the waterproof sheet SH located on the fixing member FX. A heating coil 6 is placed on top of the pressing pad 5 with a resin plate 64 in between, and a ferrite 65 is placed further above.

As shown in FIG. 4, the resin plate 64 is a circular plate in which four circular recesses 640 are formed, distributed at a circumferential angle of 90 degrees. A circular displacement detection coil 63 functioning as a displacement sensor is arranged in each circular recess 640 . A wiring groove 641 connected to each circular recess 640 is formed for the detection signal wiring of the positional deviation 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 further transmitted to the resin plate 64 and the positional deviation detection coil 63.

The inner diameter of the circular recess 640 is set to be slightly larger than the outer diameter of the positional deviation detection coil 63. This makes it easier to attach the positional deviation detection coil 63 to the circular recess 640. Moreover, when a pressing force is applied to the positional deviation detection coil 63, the positional deviation detection coil 63 is allowed to expand outward a little, and is restricted from expanding beyond a predetermined value. As a result, the positional deviation detection coil 63 is held in an appropriate posture during induction heating welding work. Furthermore, the depth of the circular recess 640 is set to be smaller than or approximately the same as the thickness of the positional deviation detection coil 63. This restricts deformation of the positional deviation detection coil 63 in the direction in which the pressing force is applied when a pressing force is applied to the positional deviation detection coil 63, and also distributes the pressing force evenly over the entire surface of the positional deviation detection coil 63. acts. This also contributes to maintaining the positional deviation detection coil 63 in an appropriate posture during induction heating welding work.

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 misalignment detection coils 63 above each misalignment detection coil 63 with the heating coil 6 in between. has been done.

As shown in FIG. 2, a power supply section 61 and a positional deviation calculation section 62 are housed inside the body section 21 of the housing 20. The power supply unit 61 supplies AC power sent through the connection cable CA and the second connector box 19b to the heating coil 6 at a predetermined timing. The positional deviation calculation unit 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 coincides with the center of the fixing member FX, that is, whether the heating coil 6 is fixed. Calculate the degree of deviation with respect to the member FX. The determination result by the positional deviation calculation unit 62 is displayed on the display panel 16 provided on the top surface of the second connector box 19b. In this embodiment, the display panel 16 includes a notification lamp to notify of positional deviation. This positional deviation notification lamp is turned on so as to guide the heating coil 6 directly above the fixing member FX. Further, if the heating coil 6 is misaligned with respect to the fixed member FX, an error lamp indicating the direction of the misalignment lights up, and if the heating coil 6 is not misaligned with the fixed member FX, an OK lamp is lit. Lighting control such as lighting may be used.

As shown in FIG. 2, the pressing operation tool 3 is attached to the upper end 22 of the housing 20. Using this pressing operation tool 3, the operator can apply a strong pressing force to the pressing pad 5 that 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 center axis CL. The pressing cap 31 is provided at the upper end of the slide rod 32. The upper surface of the pressing cap 31 is curved in an arch shape 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 move forward and backward. As a result, when the pressing cap 31 is slid and displaced from the first position, which is an upper position, to the second position, which is a lower position, while being guided by the annular projection 22b and the annular hole 31a, the slide rod 32 is also moved. and slide downward. The switch operating body 33 is provided at the lower end of the slide rod 32 inside the upper storage chamber 22a. The switch operating body 33 is a disc whose lower peripheral edge is chamfered.

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

Inside the upper storage chamber 22a, a heating switch 34 consisting of a microswitch that is turned ON/OFF is further provided. Heating switch 34 is connected to power supply section 61 . Due to the sliding displacement of the press cap 31 from the first position to the second position, the switch actuating body 33 also descends, and in the middle of its 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 signal for starting power supply by the power supply section 61, the power supply section 61 that has received the ON signal causes a predetermined alternating current to flow through the heating coil 6. Thereby, induction heating of the fixing member FX by the heating coil 6 is started.

The induction heating welding device 2 includes a non-contact temperature sensor 7 (for example, infrared type) that detects the surface temperature of the waterproof sheet SH, and a temperature sensor 7 that calculates 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 need to be placed as far away from the heating coil 6 as possible so as to avoid signal interference due to the excitation of the heating coil 6 as much as possible. Therefore, the infrared passage path formed between the temperature sensor 7 and the waterproof sheet SH becomes long. In order to secure this infrared passage, a first through hole 23d (see FIG. 2) is provided in the lower end portion 23 of the housing 20, a second through hole 642 (see FIG. 4) is provided in the resin plate 64, and a press pad 5 is provided with a third through hole 51 (see FIG. 2). Furthermore, as shown in FIG. 5, the heating coil 6 is divided into an inner coil part and an outer coil part, and the outermost winding of the inner coil part and the innermost winding of the outer coil part are separated. Due to the widening of the interval, a gap SP is formed between the inner coil part and the outer coil part. With this structure, an infrared passage of 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 the dashed-dotted line arrow in FIG. 2). The 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 .

As shown in FIG. 3, a skirt unit 8 is provided at the lower end 23 of the housing 20. 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 into 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 contact 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 attached to the outer circumferential surface of the lower end portion 23 so as to be slidable along a vertical line passing through the center of the contact surface 50 (corresponding to the central axis CL). The inner diameter of the skirt body 81 is equal to the outer diameter of the fixing member FX plus a 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 coaxially arranged with respect to the central axis CL. As a result, when the tip of the skirt body 81 is fitted to the fixed member FX with the waterproof sheet SH in between, the center of the fixed member FX, the center of the skirt body 81, and the centers of the pressing pad 5 and heating coil 6 are substantially aligned. Match. The orientation 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 skirt unit 8 is further pressed downward in a state where the heating coil 6 and the fixing member FX are aligned, the skirt body 81 is moved along the central axis CL. The contact surface 50 of the pressure pad 5 is brought into close contact with the surface of the waterproof sheet SH. The sliding stroke ST of the skirt body 81 is such that the lower end of the skirt body 81 almost coincides with the position where the lower end of the skirt body 81 protrudes from the contact surface 50 by a predetermined length (several mm to tens of mm) and the contact surface 50 This is the length between the two positions. If the skirt body 81 slides upward with a light force, it will not be possible to align the skirt body 81 by fitting it shallowly onto the fixing member FX. A means of 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. Note that a pneumatic spring or a fluid pressure spring may be used as the resistance means.

As a result of experiments, it has been found that a spring force of 1 N/cm2 or more is suitable as the spring force.

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

As shown in FIGS. 3, 6, and 7, the skirt body 81 is formed with a J-shaped pin guide groove 84 that is open at the upper end of the skirt body 81. Further, a locking pin 83 is screwed into the peripheral wall of the lower end portion 23 in the radial direction. The width of the pin guide groove 84 is such that the locking pin 83 can be inserted therein. In addition, in FIG. 3, a vertical cross section cut along a plane passing through the resistance spring 80 is shown on the right side of the central axis CL, and a vertical cross 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. This pin guide groove 84 is connected to 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 is connected to the first groove 841 and extends in the circumferential direction, and a second groove 842 that is connected to the first groove 841 and extends in the circumferential direction. and a third groove 843 extending in the axial direction. The head of the locking pin 83 enters through the opening of the first groove 841. The skirt body 81 is guided by the locking pin 83 and the first groove 841 to slide upward. 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 urged downward by the resistance spring 80, but as the locking pin 83 comes into contact with the upper end of the third groove 843, the skirt body 81 The downward sliding movement of the body 81 is restricted. That is, the locking pin 83 and the upper end of the third groove 843 function as a locking tool that limits the length of the skirt body 81 projecting downward from the pressing pad 5 to a predetermined value.

The spring force of the resistance spring 80 becomes a resistance force when the skirt body 81 is slid upward. The spring force of the pressing spring 30 becomes a pressing force generated by operating the pressing cap 31. Therefore, if the spring force of the resistance spring 80 is larger than the spring force of the pressure spring 30, the skirt body 81 will resist the pressure set by the pressure spring 30 when aligning the pressure pad 5 and the heating coil 6 described above. The waterproof sheet SH will be pressed with an exceeding force. This leads to deformation of the tarpaulin SH. Therefore, the spring force of the resistance spring 80 in the direction of the center axis CL is set to be weaker than the spring force of the pressure spring 30 in the direction of the center axis CL.

As shown in FIG. 8, the heat welding management device 1 is equipped 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 above-mentioned power supply unit 11, GNSS unit 12, data logger unit 13, environmental temperature detection unit 14, operation panel 15, and display panel 16.

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

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

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

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 induction heating, that is, the timing of stopping the power supply to the heating coil 6, is determined by the preset heating time, but the timing of stopping the power supply is determined by the surface temperature of the waterproof sheet SH measured by the temperature measurement circuit 70. May be adjusted.

When the decision on the power supply stop timing is left to the operator, the timing when the heating switch 34 is switched from ON to OFF is used. When the operator releases the force 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 activated. Switches from ON to OFF.

The second control unit 10b sends data on the supply time of induction heating power, data indicating the state of the heating switch 34, measurement result data of the temperature measurement circuit 70, etc. to the data logger unit 13. The first control unit 10a sends positioning data from the GNSS unit 12, environmental temperature data from the environmental temperature detection unit 14, specification data for induction heating power generated by the power supply unit 11, etc. to the data logger unit 13. The data logger unit 13 records the received data in a predetermined format in a 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 transmitted to the first control unit 10a. The information is sent and displayed on the display panel 16 as appropriate. Furthermore, the error data is also sent to the data logger unit 13 and stored together with the positioning data.

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

(2) In the embodiment described above, the sheet welded to the fixing member FX is the waterproof sheet SH, but other sheets may be used.

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

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

(5) In the embodiment described above, the fixing member FX was fixed to a waterproof base made of concrete. The fixing member FX may be fixed to a precast concrete base other than a concrete slab, or a waterproof base made of another material such as metal. Further, the waterproof base to which the fixing member FX is fixed may be not only a horizontal surface but also a vertical surface such as a vertical wall or an inclined 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 steel plate.

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

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

The present invention can be applied to an induction heating welding device that welds a sheet material and a conductive member by induction heating the conductive member covered with the sheet material and pressing the sheet material against the conductive member.

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 calculation part 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 Component SH: Waterproof sheet

Claims (6)

An induction heating welding device that welds the sheet material and the conductive member by inductively heating the conductive member covered with the sheet material from the upper surface of the sheet material and pressing the sheet material and the conductive member. ,
a heating coil that inductively heats the conductive member;
a housing that houses the heating coil;
a pressing pad that is attached to the lower end of the housing and has a contact surface that can come into contact with the sheet material;
a skirt unit that has an inner peripheral shape that can follow the outer contour of the conductive member while sandwiching the sheet material, and is attached to the lower end portion so as to be slidable along a vertical line of the contact surface;
Induction heating welding equipment equipped with The guide according to claim 1, wherein the skirt unit includes a skirt body that slidably fits onto the side wall of the lower end portion, and a resistance means that provides a resistance force against upward sliding of the skirt body. Heat welding equipment. The induction heating welding apparatus according to claim 2, wherein the resistance means is a resistance spring that urges the skirt body against the sheet material. The induction heating welding apparatus according to claim 2 or 3, further comprising a locking device that limits a protrusion length of the skirt body from the pressing pad to the sheet material to a predetermined value. The heating coil is wound in a circular shape, the lower end portion is cylindrical, the pressing pad is a disk fixed to the end surface of the lower end portion, and the skirt body is cylindrical,
The induction heating welding apparatus according to any one of claims 2 to 4, wherein the lower end portion, the heating coil, the pressing pad, and the skirt body are coaxially arranged with the vertical line as a central axis. A pressing operation tool that is displaced along the vertical line, and a pressing spring that presses the pressing pad against the sheet material with a spring force defined by the displacement of the pressing operation tool,
The induction heating welding apparatus according to any one of claims 2 to 5, wherein the resistance force of the resistance means in the direction of the vertical line is set to be weaker than the spring force of the pressing spring in the direction of the vertical line.

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