Waterproof sheet seam welding management device and management method

Abstract

To make it possible to verify whether defective welding is caused by defective operation of a welding machine when a joint of a waterproof sheet stretched over a structure to be waterproofed, such as a tunnel, is defective, in addition, to facilitate identification of a defective welding location caused by the defective operation.SOLUTION: While moving a welding machine 10 along a joint 2c of a waterproof sheet 2, the welding machine 10 welds the joint 2c. Output information including a welding temperature of the welding machine 10 is acquired over time by an output acquisition unit 31 of the welding management device 30 and stored in the storage units 35 and 45. A creation unit 41 creates display data 47 representing the welding temperature at each position corresponding value of the joint 2c of the waterproof sheet 2 from the stored output information.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an apparatus and method for managing construction of waterproof sheets stretched over structures to be waterproofed, such as tunnels, and more particularly to an apparatus and method for managing welding construction of joints between adjacent waterproof sheets. [Background technology]

[0002] For example, in mountain tunnels, waterproofing consisting of multiple waterproof sheets is applied to the back of the lining. Each waterproof sheet is stretched with its longitudinal direction aligned with the circumferential direction of the upper half arch of the tunnel and its transverse direction aligned with the tunnel axis. Multiple waterproof sheets are lined up in the tunnel axis direction. The joints between the opposing ends of adjacent waterproof sheets are welded together using a welding machine (see Patent Document 1, etc.). The welding reference temperature (target temperature) is set in advance before construction. The reference temperature is set according to the outside temperature, for example, around 360°C in summer and 380°C in winter. The setting is done manually by the worker. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-113801 [Patent Document 2] Patent Publication No. 2021-096101 Summary of the Invention [Problem to be solved by the invention]

[0004] Poor welding can occur when processing waterproofing sheet seams. This can be caused by human error, such as improper application of the welding machine or incorrect temperature settings, or by malfunction of the welding machine, such as the actual welding temperature (output temperature) not reaching the standard temperature. However, since the welding temperature of a welding machine is usually considered to be controlled to the standard temperature, and actual welding temperature data is not available, it is unclear whether poor construction is due to malfunction of the welding machine. Furthermore, checking for poor welding requires visual inspection of the entire length of the seam and conducting pressurized leak tests, which is cumbersome. In view of the above circumstances, the present invention aims to make it possible to verify whether poor welding at the seams of a waterproof sheet is caused by a malfunction of the welding machine, and to make it easy to identify the location of the poor welding caused by the malfunction. [Means for solving the problem]

[0005] In order to solve the above problems, the present invention provides a waterproof sheet welding management device that manages the welding state of a waterproof sheet joint by a welding machine when the waterproof sheet is stretched over a waterproof structure, and includes the following features: an output acquisition unit that acquires output information over time, including a welding temperature of the welding machine while the welding machine is moving along the seam; a storage unit that stores the output information; a creating unit that creates display data representing the welding temperature at each position corresponding value of the seam of the waterproof sheet from the stored output information; The present invention is characterized by the following features. This makes it possible to verify the relationship between the welding machine output and the welding condition by checking the displayed data, making it easier to find areas of poor welding caused by welding temperature.

[0006] Each of the position-corresponding values ​​may be an elapsed time from the start of welding. Preferably, the creating unit creates display data showing the welding temperature versus the elapsed time. Normally, the welding machine moves along the seam at a constant speed during welding. Therefore, the elapsed time from the start of welding is roughly proportional to the distance the welding machine has moved since the start of welding, and can serve as information indicating the position of the welding machine. Therefore, the welding temperature at each position along the seam can be confirmed from the display data showing the welding temperature versus the elapsed time.

[0007] It is preferable that the welding management device further includes a position estimation unit that estimates the position of the welding machine at the time of acquisition from the length from the welding start position to the welding end position of the seam, the time from the welding start position to the welding end position, and the elapsed time from the welding start position to the output information acquisition position. It is preferable that the creating unit creates the display data using the estimated positions as the position corresponding values, thereby making it possible to directly display the relationship between each position of the seam and the welding temperature. The length of the seam from the welding start position to the welding end position is known or measurable. The time from the welding start position to the welding end position is acquired by the output acquisition unit as part of the output information. The ratio of the distance traveled by the welder from the welding start position to the length from the welding start position to the welding end position at the time of acquisition is equal to the ratio of the elapsed time from the welding start position to the time of acquisition to the time from the welding start to the welding end position. Therefore, the distance traveled by the welder at the time of acquisition, and therefore the position of the welder at the time of acquisition, can be calculated from the length from the welding start position to the welding end position, the time from the welding start to the welding end position, and the elapsed time from the welding start to the time of acquisition. This provides display data of the welding temperature at each position of the seam.

[0008] the output acquisition unit includes a temperature acquisition unit that acquires the welding temperature and a speed acquisition unit that acquires speed information of the welding machine, a position estimation unit that estimates a position of the welding machine at the time of acquiring the output information from the speed information, It is preferable that the creation unit creates the display data using the estimated positions as the position correspondence values. For example, the position of the welder at a certain time (the distance traveled from the welding start position) can be determined from the product of the speed information and the time elapsed since the start of welding, or from the time integral of the speed information.

[0009] It is preferable that the welding management device further comprises an outside air thermometer for measuring the outside air temperature and a temperature setting means for automatically setting the reference welding temperature in the welding machine based on the measurement value of the outside air thermometer, thereby avoiding human input errors in the reference welding temperature according to the outside air temperature.

[0010] It is preferable that the welding management device further includes an alarm means for issuing an alarm when the temperature difference between the welding reference temperature in the welding machine and the welding temperature exceeds a predetermined value, thereby alerting the worker during welding work to the possibility of welding defects caused by the welding machine.

[0011] The method of the present invention is a method for managing the welding state of a seam of a waterproof sheet stretched over a waterproof structure by a welding machine, comprising the steps of: welding the seam with the welding machine while moving the welding machine along the seam; a step of acquiring output information including a welding temperature of the welding machine over time during the welding; storing the output information in a storage unit; a step of creating display data representing the welding temperature at each position corresponding value of the seam of the waterproof sheet from the stored output information; The present invention is characterized by the following features. The display data allows verification of the relationship between the output of the welding machine and the state of work, and allows management of the quality of the welding work.

[0012] It is preferable that each of the position correspondence values ​​is an elapsed time from the start of welding, and that the creating step creates display data that indicates the welding temperature relative to the elapsed time. The position of the welding machine can be estimated from the elapsed time, and the welding temperature at each position of the seam can be confirmed from the display data showing the welding temperature versus the elapsed time.

[0013] a position of the welding machine at the time of acquisition is estimated from a length from a welding start position to a welding end position of the seam, a time from the welding start position to the welding end position, and an elapsed time from the welding start position to the acquisition of the output information; It is preferable to create the display data using the estimated positions as the position correspondence values. This provides display data of the welding temperature at each position of the joint, making it easier to verify the relationship between welding defects and welding temperatures.

[0014] acquiring speed information of the welding machine as the output information, and estimating the position of the welding machine at the time of acquiring the output information from the speed information; It is preferable to create the display data using the estimated position as each of the position correspondence values, thereby enabling the position of the welder to be accurately estimated even if the speed of the welder fluctuates.

[0015] It is preferable to correct the estimated position based on a calculated value of the travel distance of the welding machine from the start to the end of welding based on the speed information of the welding machine and the actual distance from the welding start position to the welding end position, thereby correcting errors in the speed information and improving the accuracy of the position estimation. [Effects of the Invention]

[0016] According to the present invention, when poor welding occurs at the seams of a waterproof sheet, it is possible to verify whether the cause is that the actual welding temperature of the welding machine does not reach the reference temperature, and it is also possible to easily identify the location of the poor welding caused by such malfunction. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is a perspective view of a tunnel showing the implementation of a waterproof sheet seam welding method using a waterproof sheet seam welding system including a waterproof sheet seam welding management device according to a first embodiment of the present invention. [Figure 2]FIG. 2 is a circuit diagram showing a schematic configuration of the waterproof sheet seam welding management system. [Figure 3] FIG. 3 is a graph showing an example of display data on the display unit of the management device. [Figure 4] FIG. 4 is a graph showing an example of display data according to the second embodiment of the present invention. [Figure 5] FIG. 5 is a graph showing an example of display data according to the third embodiment of the present invention. [Figure 6] FIG. 6 is a circuit diagram showing a schematic configuration of a waterproof sheet seam welding system including a waterproof sheet seam welding management device according to a fourth embodiment of the present invention. [Figure 7] FIG. 7 is a circuit diagram showing a schematic configuration of a waterproof sheet seam welding system including a waterproof sheet seam welding management device according to a fifth embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. <First embodiment (FIGS. 1 to 3)> As shown in Figure 1, in a mountain tunnel 1, a waterproofing work consisting of multiple waterproof sheets 2 is installed between a primary lining 1a and a secondary lining 1b. Each waterproof sheet 2 is stretched with its longitudinal direction aligned with the circumferential direction of the upper half arch of the tunnel 1 and its short side aligned with the tunnel axis direction. The multiple waterproof sheets 2 are lined up in the tunnel axis direction. The joints 2c between the opposing ends of two adjacent waterproof sheets 2 are welded together.

[0019] As shown in Fig. 1, the welding is performed by a waterproof sheet seam welding system 3. As shown in Fig. 2, the waterproof sheet seam welding system 3 includes a welding machine 10 and a waterproof sheet seam welding management device 30. The welding machine 10 includes a welding operation unit 11 and a welding control circuit 20.

[0020] As shown in Figure 2, the welding operating unit 11 has a pair of opposing rollers 12 and a heater 13. The pair of rollers 12 sandwich and overlap the ends of two waterproof sheets 2 to be welded. Each roller 12 is connected to a motor 14 via a torque transmission mechanism (not shown). Driven by the motor 14, the pair of rollers 12 are driven to rotate synchronously with each other in opposite directions. This moves the welding machine 10 in the extension direction of the seam 2c along the tunnel circumferential direction. The movement speed correlates with the output rotation speed of the motor 14.

[0021] A heater 13 is provided immediately in front of (to the right in FIG. 2) the roller 12 in the direction of movement of the welding machine 10 (the direction of the outline arrow in FIG. 2). The heater 13 may be disposed downstream of the roller 12 .

[0022] A thermocouple 15 (welding thermometer) is built into the heater 13. (In FIG. 2, for convenience of illustration, the thermocouple 15 is placed on the outside of the heater 13.) The thermocouple 15 detects the welding temperature caused by the heater 13.

[0023] As shown in FIG. 2, a welding control circuit 20 is connected to the welding operation unit 11. The welding control circuit 20 includes a temperature adjustment unit 21, a speed control unit 22, a heater drive unit 23, and a motor drive unit 24. The input terminal of the temperature adjustment unit 21 is connected to the detection temperature feedback line 15c of the thermocouple 15. The temperature adjustment unit 21 is provided with a temperature setting unit 25. The temperature setting unit 25 sets a reference temperature (target temperature) for welding by the heater 13. The temperature setting unit 25 is configured with a touch panel monitor, but may also be configured with a dial, temperature increase / decrease button, or other knob. The heater drive unit 23 is connected to one of the output terminals of the temperature adjustment unit 21. The heater drive unit 23 is provided as an attachment to the heater 13 and turns the heater 13 on and off or increases / decreases its output. The temperature adjusting unit 21 operates the heater driving unit 23 based on the temperature detected by the thermocouple 15, thereby performing feedback control so that the output temperature (welding temperature) of the heater 13 becomes the reference temperature.

[0024] The speed control unit 22 is provided with a speed setting unit 26. The speed setting unit 26 sets the rotation speed of the roller 12 and therefore the movement speed of the welding machine 10. The speed setting unit 26 is configured with a dial, but may also be configured with other knobs such as a speed increase / decrease button or a touch panel monitor.

[0025] A motor driving unit 24 is connected to the output terminal of the speed control unit 22. The speed control unit 22 controls the motor driving unit 24 so that the motor output corresponds to the speed set by the speed setting unit 26. The motor driving unit 24 is attached to the motor 14 and drives the motor 14 under the control of the speed control unit 22 .

[0026] As shown in Fig. 2, a waterproof sheet seam welding management device 30 is connected to the welding machine 10. The waterproof sheet seam welding management device 30 includes a management unit 39 and a processing unit 40. The management unit 39 includes a CPU 31, a power supply circuit 32, a signal conversion unit 33, a memory unit 35, an alarm buzzer 37, and a communication unit 36.

[0027] A temperature signal conversion unit 33 is connected to one of the output terminals of the temperature adjustment unit 21 .

[0028] The signal conversion unit 33 is connected to the CPU 31. The CPU 31 performs predetermined processing based on a predetermined program to manage the welding state of the seam 2c of the waterproof sheet 2. A memory unit 35 and an alarm buzzer 37 are connected to the CPU 31. The memory unit 35 stores the program, setting data, etc.

[0029] Furthermore, a computer 40 is connected wirelessly or by wire to the CPU 31 via a communication unit 36. The communication unit 36 ​​may include a public communication network such as the Internet. The computer 40 is configured by a smartphone, but is not limited to this and may also be configured by a tablet, a laptop computer, a desktop computer, cloud computing, etc. The computer 40 includes a CPU 41, a storage unit 45, and a display 46 (display unit).

[0030] The welding state of the seam 2c of the waterproof sheet 2 is managed by the management device 30 as follows. <Welding process> During welding, the heater 13 of the welding machine 10 is operated and the pair of rollers 12 are rotated synchronously. As a result, the ends of the two waterproof sheets 2 that make up the seam 2c to be welded are heated and then introduced between the pair of rollers 12 and welded. At the same time, as shown by the white arc arrow in Figure 1, the welding machine 10 is moved at a set speed along the circumferential direction of the tunnel arch from one end 2p to the other end 2q of the seam 2c.

[0031] <Output information acquisition process> During the welding process, the output temperature (welding temperature) of heater 13 is detected continuously or at short intervals by thermocouple 15. The detection signal of the welding temperature is used for feedback control by temperature adjustment unit 21 and is output from temperature adjustment unit 21 to management device 30. In management device 30, the detection signal is converted into digital form by signal conversion unit 33 and input to CPU 31 as welding temperature information. CPU 31 stores the received welding temperature information together with the time of reception in memory unit 35. The welding temperature and time information constitute output information of welding machine 10. CPU 31 functions as a temperature acquisition unit that acquires the welding temperature over time, and also functions as an output acquisition unit that acquires output information over time.

[0032] <Storage process> The output information of the welding machine 10 over time is stored in the memory unit 35. Furthermore, the output information is transmitted to the computer 40 via the communication unit 36 ​​and stored in the storage unit 45 as well.

[0033] <Monitoring process> At the same time, the CPU 31 monitors the temperature difference between the acquired welding temperature and a reference welding temperature, which is set, input, and stored in the storage unit 35 in advance. When the temperature difference exceeds a certain level, an alarm command is output from CPU 31 to alarm buzzer 37, and an alarm is issued from alarm buzzer 37. This notifies the worker performing the welding operation of a welding abnormality, such as a poor welding caused by welding machine 10, and urges the worker to take action. As an alarm means, instead of or in addition to the alarm buzzer 37, a light emitter such as a patrol lamp may be used.

[0034] Each time a new waterproof sheet 2 is added in the tunnel axial direction, a seam 2c is welded, and output information from the welding machine 10 is acquired for each seam 2c, which is then stored in the memory units 35 and 45. The output information for a particular seam 2c among multiple seams 2c spaced apart in the tunnel axial direction may be distinguished based on data on the distance from the tunnel entrance. The output information for a particular seam 2c may also be distinguished based on the number of the seam 2c counting from the entrance.

[0035] <Creation process> During or after the welding process, the CPU 41 of the computer 40 reads the output information of the specific seam 2c stored in the memory unit 45 in response to a display command from the manager or worker. Then, from the output information, display data 47 showing the welding temperature at each position corresponding value of the specific seam 2c is created and displayed on the display 46. The CPU 41 constitutes a creation unit that creates the display data 47. As shown in FIG. 3, the display data 47 is a graph in which the horizontal axis represents the time elapsed since the start of welding and the vertical axis represents the welding temperature. The time elapsed since the start of welding is a value corresponding to each position in the extension direction of the specific seam 2c. That is, during the welding process, the welding machine 10 moves along the seam 2c at a substantially constant speed set by the speed setting unit 26. Therefore, the time elapsed since the start of welding is proportional to the distance L traveled by the welding machine from the start of welding. 10 (FIG. 1), and can be information indicating where the welding machine 10 was located on the seam 2c when the output information was acquired. In other words, the start point p of the horizontal axis of the display data 47 corresponds to the welding start position 2p of the seam 2c (FIG. 1). The midpoint of the horizontal axis of the display data 47 corresponds to the midpoint in the extension direction of the seam 2c. The end point q of the horizontal axis of the display data 47 corresponds to the welding end position 2q of the seam 2c (FIG. 1). Note that the time when the output information was acquired may be used as the horizontal axis. It can be said that the time itself essentially represents the elapsed time from the start of welding.

[0036] <Verification process> The manager or worker can check the welding temperature at each position of the seam 2c from the display data 47 on the display 46. Furthermore, by comparing the display data 47 with the actual welding defects of the seam 2c, it can be verified whether the welding defects are caused by malfunction of the welding machine 10.

[0037] As shown in the graph in Figure 3, the welding temperature (output of the welding machine 10) is usually almost the same as the reference temperature. If there is an abnormal point a on the graph where the welding temperature is significantly different from the reference temperature, there is a possibility that a construction defect, such as a welding defect, caused by the welding machine 10 may be occurring at the position on the seam 2c corresponding to the horizontal axis coordinate ta of the abnormal point a. Therefore, by focusing on inspecting the corresponding position, it becomes easier to find construction defects, and the management of the welding status can be made more efficient.

[0038] Next, another embodiment of the present invention will be described. In the following embodiments, the same components as those already described will be denoted by the same reference numerals in the drawings and the description thereof will be omitted. <Second embodiment (Fig. 4)> As shown in FIG. 4, in the second embodiment, the horizontal axis of display data 47B is set to the distance (estimated position) from the welding start position. In the process of creating the display data 47B, the CPU 41 (see FIG. 2) reads the output information of the specified seam 2c and estimates the position on the seam 2c where the output information was acquired. Specifically, in accordance with the following equation (1), the distance L from the welding start position 2p to the point where each piece of output information was acquired is calculated. 10 Ask for. L 10 =(L 2c / t 2c )×t 10 (1) distance L 10 are the positional correspondence values ​​that represent the positions on the seam 2c. 2c is the total length L of the joint 2c 2c That is, the length from the welding start position 2p to the welding end position 2q. 2c is equal to the perimeter of the tunnel arch, is known, and is stored in advance in the storage unit 45. If it is not known, it is measured in advance and stored in the storage unit 45. 2c is the time from the start of welding to the end of welding. 10 is the elapsed time from the start of welding to the acquisition of each welding temperature information.

[0039] The CPU 41 calculates the distance L 10 The display data 47B is created and displayed on the display with the horizontal axis scale being Lb. This allows the manager or worker to easily determine which position on the seam 2c the welding temperature displayed in the graph corresponds to. If there is an abnormality point b in the welding temperature on the graph, by reading the horizontal axis coordinate Lb of the abnormality point b, it is possible to easily determine which position on the seam 2c the abnormality point b corresponds to.

[0040] <Third embodiment (Fig. 5)> 5, in the third embodiment, the horizontal axis of display data 47C has two scales. One scale indicates the elapsed time from the start of welding, and the other scale indicates the distance from the welding start position. These elapsed time and distance are position-corresponding values ​​that indicate positions on seam 2c.

[0041] <Fourth embodiment (FIG. 6)> As shown in Fig. 6, in a waterproof sheet seam welding system 3B according to the fourth embodiment, a control signal conversion unit 34 is provided in a management unit 39 of a waterproof sheet seam welding management device 30. A control signal line from the speed control unit 22 to the motor drive unit 24 branches off and is connected to the control signal conversion unit 34. The control signal conversion unit 34 is connected to a CPU 31.

[0042] <Welding speed acquisition process> When welding the seam 2c, in addition to welding temperature information, speed information of the welding machine 10 is acquired over time as output information. That is, a control signal is output from speed control unit 22 to motor drive unit 24, which drives motor 14, causing roller 12 to rotate and welding machine 10 to move along seam 2c. At the same time, the control signal from speed control unit 22 is also output to management device 30. In management device 30, the control signal is converted into a digital signal by signal converter 34 and then input to CPU 31. This control signal corresponds to the output of motor 14 and, by extension, the rotational speed of roller 12, and is equivalent to real-time speed information of welding machine 20. At this time, CPU 31 functions as a speed acquisition unit that acquires speed information of welding machine 20.

[0043] <Position estimation process> Furthermore, the CPU 31 estimates the position of the welder 10 on the joint 2c at each temperature detection time (when the output information is acquired) from the acquired speed information of the welder 10. That is, from the product of the speed information and the elapsed time from the start of welding or the time integral of the speed information, the CPU 31 calculates the position information of the welder 10 at a certain time t, i.e., the movement distance L of the welder 10 from the welding start position. 10At this time, the CPU 31 functions as a position estimation unit. The welding temperature at each position of the seam 2c is determined by combining the welding temperature information over time and the position information. The speed set by the speed setting unit 26 is used as speed information, and the position L of the welding machine 10 is calculated by multiplying the set speed by the elapsed time from the start of welding. 10 may be estimated.

[0044] <Correction process> Preferably, the calculated moving distance L of the welding machine 10 from the welding start position to the welding end position is 10q and the actual length L of the seam 2c from the welding start position to the welding end position 2c Based on this, the position information L at each temperature detection time is 10 Specifically, the calculated moving distance to the welding end position L 10q and the actual length of the seam 2c, L 2c Therefore, the correction coefficient α = (L 2c / L 10q ) is calculated by adding the correction coefficient α to the position information L 10 and the corrected position information L' 10 =α L 10 This allows the error in the speed measurement of the welding machine 10, and hence the error in the position estimation, to be corrected, thereby improving accuracy. 10 are the position corresponding values ​​that represent the positions on the seam 2c.

[0045] <Storage process> The output information and position information of the welding machine 10 over time are stored in the memory unit 35. Furthermore, the output information and position information are transmitted to the computer 40 via the communication unit 36 ​​and stored in the storage unit 45 as well.

[0046] <Creation process> During or after the welding operation, the CPU 41 of the computer 40 reads the welding temperature information and position information for a specific seam 2c stored in the memory unit 45 in response to a display command from an administrator or the like, creates display data showing the welding temperature at each position on the seam 2c, and displays it on the display 46. This display data is, for example, a graph similar to that shown in Figure 4, but by taking into account the speed information of the welding machine 10 and making further corrections, highly accurate display data can be obtained. Even if the speed of the welding machine 10 fluctuates, the position of the welding machine 10 can be accurately determined, and the welding temperature at each position on the seam 2c can be accurately displayed.

[0047] <Fifth embodiment (FIG. 7)> As shown in FIG. 7, a waterproof sheet seam welding system 3C according to a fifth embodiment of the present invention is provided with an outdoor air thermometer 50. The outdoor air temperature is measured by the outdoor air thermometer 50. The measured outdoor air temperature information is converted into digital data by a signal converter 33 and input to a CPU 31. The CPU 31 determines the reference temperature for welding based on the measured outdoor air temperature. For example, when the outdoor air temperature is equivalent to a summer temperature, the reference temperature for welding is set to approximately 360°C. When the outdoor air temperature is equivalent to a winter temperature, the reference temperature for welding is set to 380°C.

[0048] Furthermore, the CPU 31 issues a command to the temperature setting unit 25 via the signal conversion unit 33 to automatically set the reference temperature in the temperature setting unit 25. This makes it possible to avoid human input errors in the reference welding temperature.

[0049] The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the invention. For example, the structure to be waterproofed is not limited to a tunnel, but may also be the bottom of a reservoir, the surface of an industrial waste disposal site, or the like. The speed information may be acquired as the rotation speed of the roller 12. A rotation speed sensor for the roller 12 may be provided as the speed information acquisition unit. A speed sensor may be provided in the welding machine 10, and a detection signal from the speed sensor may be used as the speed information. [Industrial Applicability]

[0050] The present invention can be applied to waterproofing of mountain tunnels, for example. [Explanation of symbols]

[0051] 1. Tunnels (waterproof structures) 1a Primary lining 1b Secondary lining 2. Tarpaulin 2c seam 3, 3B~3C Waterproof sheet welding system 10 Welding machine 11 Welding actuation unit 12 Rollers 13 Heater 14 motor 15 Thermocouple (welding thermometer) 20 Welding control circuit 21 Temperature control section 22 Speed ​​control section 23 Heater drive unit 24 Motor drive unit 25 Temperature setting section 26 Speed ​​setting section 30 Welding control device 31 CPU 32 Power supply circuit 33 Temperature signal conversion unit 34 Speed ​​control signal converter 35 Storage section 36 Communications Department 37 Warning buzzer 39 Management Department 40 Computer (processing section) 41 CPU 45 Storage section 46 Display section 47 Display Data 50 Outside temperature gauge

Claims

1. A device for managing the welding state of the seams of a waterproof sheet stretched over a waterproof structure by a welding machine, an output acquisition unit that acquires output information over time, including a heater temperature detected by a welding thermometer built into a heater of the welding machine while the welding machine is moving along the seam and welding the seam, from a temperature adjustment unit that performs feedback control to keep the heater at a reference temperature; a storage unit that stores the output information; a creating unit that creates display data representing the temperature of the heater at each position corresponding to each position in the extension direction of the seam of the waterproof sheet from the stored output information; A waterproof sheet seam welding management device comprising:

2. Each of the positional correspondence values ​​is an elapsed time from the start of welding, 2. The waterproof sheet joint welding management device according to claim 1, wherein the creation unit creates display data that indicates the temperature of the heater relative to the elapsed time.

3. a position estimation unit that estimates the position of the welding machine at the time of the welding from the length from the welding start position to the welding end position of the seam, the time from the welding start position to the welding end position, and the elapsed time from the welding start position to the welding end position, 2. The waterproof sheet joint welding management device according to claim 1, wherein the creation unit creates the display data using the estimated positions as the position correspondence values.

4. the output acquisition unit includes a temperature acquisition unit that acquires a temperature of the heater and a speed acquisition unit that acquires speed information of the welding machine, a position estimation unit that estimates a position of the welding machine at the time of acquiring the output information from the speed information; Further preparation, 2. The waterproof sheet joint welding management device according to claim 1, wherein the creation unit creates the display data using the estimated positions as the position correspondence values.

5. An outside air thermometer to measure the outside temperature, a temperature setting means for automatically setting the reference temperature for welding in the welding machine based on the measurement value of the outside air thermometer; The welding management device according to any one of claims 1 to 4, further comprising:

6. The welding management device according to any one of claims 1 to 5, further comprising an alarm means for issuing an alarm when a temperature difference between the reference temperature for welding in the welding machine and the temperature of the heater becomes equal to or greater than a predetermined value.

7. A method for managing the welding state of a waterproof sheet joint that is stretched over a waterproofing target structure by a welding machine, comprising: welding the seam with the welding machine while moving the welding machine along the seam; a step of acquiring output information including a heater temperature detected by a welding thermometer built into the heater of the welding machine during the welding over time from a temperature adjusting unit that performs feedback control to keep the heater at a reference temperature; storing the output information in a storage unit; a step of creating display data representing the temperature of the heater at each position corresponding to each position in the extension direction of the seam of the waterproof sheet from the stored output information; A waterproof sheet seam welding management method comprising:

8. Each of the positional correspondence values ​​is an elapsed time from the start of welding, 8. The waterproof sheet joint welding management method according to claim 7, wherein the creating step creates display data showing the temperature of the heater versus the elapsed time.

9. a position of the welding machine at the time of acquisition is estimated from a length from a welding start position to a welding end position of the seam, a time from the welding start position to the welding end position, and an elapsed time from the welding start position to the acquisition of the output information; 8. The waterproof sheet joint welding management method according to claim 7, wherein the display data is created using the estimated positions as the position corresponding values.

10. acquiring speed information of the welding machine as the output information, and estimating the position of the welding machine at the time of acquiring the output information from the speed information; The display data is created using the estimated positions as the position correspondence values. The method for controlling welding of waterproof sheet seams according to claim 7.

11. A method for managing the welding of waterproof sheet seams as described in claim 10, characterized in that the estimated position is corrected based on a calculated value of the travel distance based on the speed information of the welding machine from the start of welding to the end of welding, and the actual distance from the start position of welding to the end position of welding.

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