JP4032379B2 - Underwater seat connection device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to underwater sheet connecting device are use in the practice of the water sheet laying method for laying a water shield sheet in water.
[0002]
[Prior art]
For example, when a part of a river or sea area is cut off to be used as a landfill or waste disposal site, it is necessary to completely seal the surrounding area with a water shielding sheet to prevent the contaminants from leaking outside. There is. Conventionally, as a method of laying such a water shielding sheet, the sheet is welded (welded) in the air, and the floating body is attached and deployed on the sea surface at a predetermined position, and the floating body is laid (laid) while removing the floating body. It was.
[0003]
By the way, the water-impervious sheet is usually provided with a limited width (2 to 6 m) as a sheet roll. Therefore, in order to lay the sheet, it is necessary to connect the sheets to increase the surface area. In this case, the water-impervious sheet must ensure the water-imperviousness of the connecting portion for the purpose of use, and conventionally, the side edge portions of the two water-impervious sheets to be connected are polymerized and this overlapped portion is used. For example, with a hot air welding machine.
[0004]
[Problems to be solved by the invention]
However, according to the connection method of the water shielding sheet using the welding by the hot air welding machine, since the connection in the air is a condition, in addition to having to perform the connection work on a narrow carriage, the connection is made. The finished large impermeable sheet had to be laid down while being suspended by, for example, a float, and there was a problem that the construction was extremely troublesome because there was a risk of sheet breakage.
[0005]
The present invention has been made in view of the above-described conventional problems, and the problem is that the problem due to the above-mentioned air connection is solved by connecting the water shielding sheets together in water, and thus the workability is improved. It is in providing the underwater sheet | seat connection apparatus which contributes greatly to improvement.
[0006]
[Means for Solving the Problems]
In order to solve the above-described problem, the underwater sheet connecting device according to the present invention is superposed on a jig plate having a sheet receiving surface that receives the side edges of the two water-impervious sheets to be connected in a superposed state. A welding unit having a sonic welding machine and a driving means for moving the welding unit. The ultrasonic welding machine of the welding unit includes a horn extending from an ultrasonic vibrator disposed in a waterproof case. The welding plate is moved forward and backward with respect to the sheet receiving surface of the tool plate to ultrasonically weld the overlapping portion of the two water shielding sheets, and the jig plate of the welding unit moves more than the sheet receiving surface. In the front part of the direction, it is provided with two guide paths that guide the two water-impervious sheets to be connected separately in the upper and lower sides, and a merge channel that joins the two guide paths on the sheet receiving surface, Two pieces of water shielding to be connected Over DOO is characterized by sliding on the sheet receiving surface in response to movement of the welding unit by the drive means. In the underwater sheet connecting apparatus configured as described above, the two water-impervious sheets are sent to the sheet receiving surface of the jig plate in a state where the side edge portions are overlapped in accordance with the movement of the welding unit. By synchronizing the intermittent movement of the plate and the advance / retreat of the horn of the ultrasonic welder, the overlapped portions of the two water shielding sheets can be continuously welded. In addition, by applying this device to the underwater sheet laying method, the use of ultrasonic welding enables reliable connection of the water-impervious sheets even in the water, eliminating the troublesome work of laying after connecting in the air. become.
[0007]
In the apparatus according to the present invention , the jig plate of the welding unit includes two guide paths that guide the two water-impervious sheets to be connected to the front portion in the moving direction from the sheet receiving surface, and the two guide paths. It can be set as the structure provided with the confluence | merging channel which joins a guide path on the said sheet | seat receiving surface. With such a structure, the two water shielding sheets can be smoothly supplied to the sheet receiving surface without impairing the rigidity of the jig plate.
The apparatus of the present invention may be configured to mount a pressing device that presses the water shielding sheet around the horn of the ultrasonic welder against the sheet receiving surface on the jig plate of the welding unit. Since ultrasonic welding can be performed with the two sheets in close contact, a sufficient amount of welding can be obtained.
The apparatus of the present invention also injects cleaning water into the joint channel of the jig plate even if the welding unit is provided with a rotating means for rotating the ultrasonic welder by a predetermined angle around its axis. An injection nozzle may be provided.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
1 to 4 show an embodiment of an underwater sheet connecting device according to the present invention. In these drawings, 1 and 2 are two water-impervious sheets to be connected, which are set on the water bottom ground 3 as a sheet laying area, and 10 is a side edge of the two water-impervious sheets 1 and 2. A welding unit 50 for ultrasonic welding in a state where the parts are superposed on each other, and a drive unit 50 for moving the welding unit 10 in the direction of arrow A (welding direction) along the superposed portion of the two water shielding sheets 1 and 2 The driving unit 50 is disposed on the front side in the welding direction A with respect to the welding unit 10.
[0009]
The welding unit 10 includes an ultrasonic welding machine 12 and a pressing device 13 mounted on a jig plate 11. The jig plate 11 includes two guide passages 14 and 15 for guiding the two water-impervious sheets 1 and 2 to be connected to each other in the upper and lower sides, and the two water-impervious sheets 1 and 2 side. A welding path 17 including a sheet receiving surface 16 that is received in a state where the edges are superposed on each other, and a joining channel 18 that joins the two guide paths 14 and 15 to the welding path 17 including the sheet receiving surface 16. The guide paths 14 and 15, the combined flow path 18, and the welding path 17 are arranged in this order from the front side to the rear side in the welding direction A.
[0010]
As shown in FIG. 4, the two guide paths 14 and 15 are cut in parallel from the left and right sides of the jig plate 11 in opposite directions, and the upper guide path 14 is welded. The guide path 15 on the lower side is used for guiding the water-impervious sheet 1 on the left side as viewed from the direction A, and the lower guide path 15 is used for guiding the water-impervious sheet 2 on the right side as viewed from the welding direction A (FIG. 3). ). The two guide paths 14 and 15 are set to have a cutting depth so as to overlap by a predetermined width S near the center of the jig plate 11 in the width direction. Thereby, the two water-impervious sheets 1 and 2 to be connected move from the guide paths 14 and 15 to the welding path 17 through the joint path 18 according to the movement of the welding unit 10 in the welding direction A, and are welded. The side edge portions are sent to the sheet receiving surface 16 of the path 17 in a state where the side edges are superposed by a predetermined width S. Here, the upper guide path 14 and the welding path 17 are set to the same height level. Therefore, in the joint path 18, the water shielding sheet 2 is stepped from the lower guide path 15 to the upper welding path 17. Will migrate. Therefore, in the present embodiment, the bottom surface 19 of the combined flow path 18 has a slope shape (FIGS. 1 and 4), and the water shielding sheet 2 is smoothly transferred from the lower guide path 15 to the welding path 17. Further, the upper surface side of the combined flow path 18 is raised to the level of the upper guide path 14, and therefore, the upper and lower water shielding sheets 1 and 2 face each other with an appropriate interval in the combined flow path 18. It is supposed to be.
[0011]
As shown in FIG. 3, the jig plate 11 has a sandwich structure in which the front side portion has an intermediate plate 23 interposed between the upper plate 20 and the lower plate 21 via a spacer 22. The upper plate 20, the middle plate 23, and the lower plate 21 are fastened with bolts 24 via spacers 22, and the gap between the upper plate 20 and the middle plate 23 guides the upper water shielding sheet 1. As the path 14 , the gap between the middle plate 23 and the lower plate 21 is provided as a guide path 15 for the lower water shielding sheet 2. On the other hand, the rear portion of the jig plate 11 has a two-layer structure of the upper plate 20 and the lower plate 21, and the welding path 17 and the combined flow path 18 are formed by the upper plate 20 and the lower plate 21. It is formed between. Each of the upper plate 20, the middle plate 23 and the lower plate 21 is made of a thick steel plate having a thickness of about 12 mm as an example, and a reinforcing rib 25 (FIG. 2) is provided on the upper surface of the upper plate 20. Thereby, the whole jig plate 11 has sufficient rigidity. In addition, a relatively large opening 26 is formed in a portion of the upper plate 20 facing the welding path 17, and a part of the sheet receiving surface 16 is opened above the jig plate 11 through the opening 26. The opening 26 is provided as a work area for the ultrasonic welder 12 and the pressing device 13, and this will be described in detail later. In FIG. 4, the jig plate 11 is shown as an integral object for convenience of explanation.
[0012]
As shown in FIG. 1, the ultrasonic welder 12 mounted on the jig plate 11 includes an ultrasonic vibrator 30, a cone 31 extending downward from the ultrasonic vibrator 30, and A horn 32 attached to the tip of the cone 31 and a pressing cylinder 33 for moving the constituent elements below the ultrasonic transducer 30 up and down are provided. Among the constituent elements of the ultrasonic welder 12, the ultrasonic transducer 30 and the pressing cylinder 33 are provided in a waterproof case 35 that can be moved up and down on a column 34 erected on the jig plate 11 and a cone 31. The horns 32 are respectively arranged outside the waterproof case 35, and a part of the ultrasonic transducer 30 is slidably and liquid-tightly inserted through the bottom plate of the waterproof case 35 and extended downward. Yes. The waterproof case 35 is driven up and down by an up and down cylinder 36 attached to the column 34. The lifting cylinder 36 is used to move the ultrasonic welder 12 and adjust the pressing height of the horn 32. Overall ultrasonic welding machine 12, the horn 32 serves position and a lowered end to slightly contact with the two sheets of water shield sheet 1 on the sheet receiving face 16, the ultrasonic welding machine 12, the downward The pressing cylinder 33 is actuated at the end so that the horn 32 is pressed against the overlapped portion of the two water-impervious sheets 1 and 2 and vibration energy generated by the ultrasonic vibrator 30 is applied to ultrasonically weld them together.
Here, a power source, an ultrasonic oscillator, a control device and the like for oscillating the ultrasonic transducer 30 are installed on a later-described carriage 5 (FIG. 6). In addition, a fluid source, a control valve, a control device, and the like for supplying and discharging the working fluid to and from the pressing cylinder 33 are also installed on the carriage 5. Of course, the mechanism for raising and lowering the waterproof case 35 is not limited to the cylinder 36, and for example, a rack and pinion mechanism may be used.
[0013]
As shown in FIGS. 5A and 5B, the horn 32 of the ultrasonic welder 12 has a flat shape as a whole. In particular, the head portion 32a on the tip side is thin and has a waved end face. It has a shape. As described above, the shape of the head portion 32a having the thin wall and the corrugated end face ensures that the overlapping portions of the two water-impervious sheets 1 and 2 are pressed, and the transmission efficiency of vibration energy to the overlapping portions is improved. This is for the purpose of improving the ultrasonic welding smoothly and rapidly. For example, the horn 32 is set to have an overall width W = 50 to 60 mm, a thickness t = 3 to 5 mm of the head portion 32a, and a waveform angle θ of the head portion 32a of about 80 to 100 degrees. .
[0014]
Here, the ultrasonic transducer 30 is rotatably connected to the piston rod 33a of the pressing cylinder 33 via a bearing 37, and a driven gear 30a is provided on the peripheral surface over almost a half circumference. It has been. On the other hand, on the bottom plate of the waterproof case 35, a rotation motor 38 having a drive gear 38a at the output shaft end, and the rotation of the motor 38 is transmitted to the ultrasonic transducer 30 via the drive gear 38a and the driven gear 30a. An intermediate gear 39 is provided. The operation of the motor 38 is controlled so as to rotate left and right by a predetermined angle α (FIG. 2) with respect to the center line of the jig plate 11, and the ultrasonic transducer 30 is accordingly controlled. Rotates around the axis by a predetermined angle α. As a result, the horn 32 is appropriately positioned in a posture inclined by a predetermined angle α with respect to the welding direction A.
[0015]
The pressing device 13 mounted on the jig plate 11 includes a cylinder (pressing cylinder) 41 disposed in a waterproof case 40 fixed on the jig plate 11, and a waterproof case from the pressing cylinder 41. A pressing head 42 that is fixed to the tip of a piston rod that passes through 40 and extends downward, and a pressing plate 43 that is integrated with the pressing head 42 are provided. The pressing plate 43 has a plate surface size that expands almost completely in the opening 26 provided in the jig plate 11, and an insertion hole that allows the insertion of the horn 32 of the ultrasonic welder 12 at one end thereof. 43a is formed. The pressing device 13 moves the pressing plate 43 forward and backward with respect to the sheet receiving surface 16 according to the operation of the pressing cylinder 41, and presses the overlapping portions of the water shielding sheets 1 and 2 against the sheet receiving surface 16. Fix it. At this time, since one end side of the pressing plate 43 presses the vicinity of the horn 32, the pressing plate 43 is pressed before the ultrasonic welding by the horn 32, so that the two sheets are brought into close contact with each other. Ultrasonic welding can be performed, and as a result, a sufficient welding amount can be obtained.
[0016]
In the present embodiment, the welding unit 10 is provided with an injection nozzle 45 for injecting cleaning water into the joint channel 18 of the jig plate 11 (FIG. 2). Clean water is pumped from the top 5 to the injection nozzle 45 through the hose 46, and this wash water passes from one opening of the combined flow path 18 to the other opening. Thus, foreign matters such as sand staying between the two water-impervious sheets 1 and 2 to be connected are discharged out of the jig plate 11. That is, foreign matter such as sand is not present on the superposed surfaces of the two water-impervious sheets 1 and 2 sent onto the sheet receiving surface 16 of the jig plate 11, and the water-imperviousness of the welded portion is guaranteed. Become.
[0017]
On the other hand, the drive unit 50 includes a cylinder (moving cylinder) 54 on a moving plate 53 having two guide paths 51 and 52 that guide two water-impervious sheets 1 and 2 to be connected separately. A pressing device 55 is mounted. The moving cylinder 54 extends and is supported in a horizontal direction by a bracket 56 erected at the rear end portion of the moving plate 53, and is surrounded by a waterproof case 57 fixed to the same bracket 56. In the moving cylinder 54, the tip of the piston rod 54 a extending toward the welding unit 10 is connected to a bracket 58 erected on the front end of the jig plate 11. The bracket 56 on the moving plate 53 side and the bracket 58 on the jig plate 11 side are operatively connected by a pair of left and right guide rods 59. One end of the guide rod 59 is fixed to the bracket 58 on the jig plate 11 side, and the other end is slidably inserted into a hollow guide 60 provided on the bracket 56 on the moving plate 53 side. Thus, when the piston rod 54a of the moving cylinder 54 on the moving plate 53 is expanded or contracted, the moving plate 53 and the jig plate 11 move relative to each other using the pair of guide rods 59 as a guide.
[0018]
The pressing device 55 mounted on the moving plate 53 can slide the waterproof case 61 from the cylinder (pressing cylinder) 62 disposed in the waterproof case 61 fixed on the moving plate 53. And a pressure head 63 fixed to the tip of a piston rod 62a that is inserted in a liquid-tight manner and extends downward. The moving plate 53 is formed with an opening 64 that opens the upper guide path 51 to the upper side of the moving plate 53, and the pressing head 63 can enter and leave the opening 64. The pressing device 55 causes the pressing head 63 to enter and exit from the opening 64 according to the expansion and contraction of the piston rod 62 a of the cylinder 62, and presses and fixes the upper water shielding sheet 1 to the moving plate 53. A fluid source, a control valve, a control device, and the like for supplying and discharging pressure fluid to and from these moving cylinders 54 and 62 are also installed on the carriage 5.
[0019]
Hereinafter, the operation of the underwater sheet connecting apparatus configured as described above and the underwater sheet laying method performed using the apparatus will be described with reference to FIGS. In FIG. 7, the welding unit 10 arranged on the rear side in the traveling direction A is shown as R, and the drive unit 50 arranged on the front side is shown as F.
When laying the sheets, the two water-impervious sheets 1 and 2 to be connected from the carriage 5 are laid on the water bottom ground 3 so that the side edges of the two are overlapped with each other. Then, the welding unit 10 and the drive unit 50 constituting the underwater sheet connecting device are hung by a crane (not shown) and lowered to the water bottom ground 3. At this time, the piping for supplying and discharging the working fluid to and from the pressing cylinder 33 on the welding unit 10 side, the lifting and lowering cylinder 36 and the pressing cylinder 41, and the moving cylinder 54 and the pressing cylinder 62 on the drive unit 50 side are It is housed in the underwater cable 6 (FIG. 6).
[0020]
The welding unit 10 and the drive unit 50 constituting the seat connection device are first lowered to the connection end side of the two water-impervious sheets 1 and 2, and first, a moving plate on the drive unit 50 side is submerged by a diver. Two corresponding water shielding sheets 1 and 2 are inserted into the upper and lower guide paths 51 and 52, respectively, and the guide paths 14 and 15 of the jig plate 11 on the welding unit 10 side, the combined path 18 and the welds. Two impermeable sheets 1 and 2 are inserted into the path 17.
[0021]
The operation of the pressing cylinder 33, the lifting cylinder 36 and the pressing cylinder 41 on the welding unit 10 side (R side) and the operation of the moving cylinder 54 and the pressing cylinder 62 on the drive unit 50 side (F side) The sequence is controlled by a sequencer (not shown) installed on the ship 5. When the connection is started, the piston rod 54 a of the moving cylinder 54 is in the extended end in advance, and the welding unit 10 and the drive unit 50 are connected. Are positioned so as to be separated from each other at maximum ((1) in FIG. 7). From this state, first, the R-side pressing cylinder 41 is actuated to lower the pressing head 42, and the pressing plate 43 presses the overlapped portion of the two water shielding sheets 1 and 2 against the sheet receiving surface 16. Subsequently, the elevating cylinder 36 is operated to lower the entire ultrasonic welding machine 12, and the tip of the horn 32 enters the insertion hole 43 a of the pressing plate 43. Thereafter, the pressing cylinder 33 is actuated so that the horn 32 is pressed against the overlapping portion of the two water-impervious sheets 1 and 2 on the sheet receiving surface 16, and the overlapping portion is generated by the vibration energy generated by the ultrasonic vibrator 30. Is ultrasonically welded. At this time, the horn 32 is positioned so as to be inclined leftward or rightward by a predetermined angle α with respect to the welding direction A by the operation of the motor 38 for rotation. As shown in FIG.
[0022]
When the ultrasonic welding is completed, the pressing cylinder 33 and the pressing cylinder 41 are operated in the opposite directions, and the pressing plate 43 and the horn 32 are slightly raised. At the same time, the F-side pressing cylinder 62 is operated. The pressing head 63 presses and fixes the upper water shielding sheet 1 to the moving plate 53. The pressing and fixing by the pressing head 63 may be performed in parallel with the ultrasonic welding process.
Next, the moving cylinder 54 is actuated, and the piston rod 54a is shortened by a stroke shorter than the width W (FIG. 5) of the horn 32 of the ultrasonic welder 12. Then, since the position of the F-side moving plate 53 is fixed with respect to the water shielding sheet 1, the R-side jig plate 11 moves toward the moving plate 53 by the stroke. During this time, the horn 32 is converted to the opposite side to the previous tilted position by the operation of the rotation motor 38, and when the movement is completed, the R-side pressing cylinder 41 and the pressing cylinder 33 are sequentially operated, and the horn again. The next ultrasonic welding is performed by 32. At this time, the welding line WL by the horn is formed in a state where it intersects the end of the previous welding line WL as shown in FIG. 8, so that no gap is generated between the welding lines WL.
Thereafter, by repeating the above operation, the ultrasonic welding of the two water-impervious sheets 1 and 2 proceeds in a staggered manner in the welding direction A. Finally, the piston rod 54a reaches the shortened end, and FIG. As shown, the R-side jig plate 11 moves forward to a position approaching the F-side moving plate 53, so that ultrasonic welding is performed by the initial interval between the welding unit 10 (R) and the drive unit 50 (F). Progresses.
[0023]
Thereafter, the F-side pressing cylinder 62 is operated, and the pressing head 63 releases the water shielding sheet 1, and at the same time, the R side pressing cylinder 41 is operated and the pressing plate 43 seats the water shielding sheets 1 and 2. Then, the piston rod 54a of the F-side moving cylinder 54 extends. Then, since the R-side jig plate 11 is fixed in position relative to the water shielding sheets 1 and 2, the F-side moving plate 53 moves forward in the welding direction A, and finally the piston rod 54a reaches the extended end. Thus, as shown in FIG. 7 (3), the F-side jig plate 11 and the F-side moving plate 53 are positioned in a state of being maximally separated from each other. That is, the welding unit 10 (R) and the driving unit (F) return to the initial state where they are separated to the maximum, and thereafter, the ultrasonic welding of the two water-impervious sheets 1 and 2 is intermittently performed by repeating the above-described operation. The sheet connection over the entire length is completed.
[0024]
Here, in the above embodiment, the motor 38 and the gears 30a, 38a, 39 are used as means for rotating the ultrasonic welding machine 12 around its axis, but this rotating means is arbitrary, For example, as shown in FIGS. 9 and 10, it may be configured to be rotated by a cylinder (rotating cylinder) 70 disposed outside the waterproof case 35. That is, a support base 71 is fixed to the upper end of the support column 34 so as to cover the upper side of the waterproof case 35, and the rotating cylinder 70 extends from the upper surface of the support base 71 to the side, and the tip end portion of the bracket 72. It is attached to the shaft. On the other hand, the pressing cylinder 33 of the ultrasonic welding machine 12 disposed in the waterproof case 35 is directly connected to the ultrasonic vibrator 30 without using the bearing 37 (FIG. 1), and from the upper end of the cylinder 33. The upper end of the rotating shaft 73 that is inserted liquid-tightly through the upper plate of the waterproof case 35 and protrudes upward is projected to the upper surface side of the support base 71, and the rotating cylinder 70 is formed at the upper end of the rotating shaft 73. The piston rod 70 a is operatively connected via a connecting arm 74. In the rotating means configured as described above, the rotary shaft 73 rotates left or right according to the expansion and contraction of the piston rod 70a of the cylinder 70, and the horn 32 of the ultrasonic welding machine 12 is predetermined with respect to the welding direction A. It is appropriately positioned in a posture inclined by the angle α, and can be advanced in the welding direction A in a manner (see FIG. 8) in which ultrasonic welding is performed similarly to the above embodiment.
[0025]
In the above embodiment, the drive unit 50 provided with the moving plate 53 is used as the drive means for moving the welding unit 10. However, the present invention does not limit the drive means, and the drive unit 50 includes Various alternative means can be used. For example, a method in which the welding unit 10 is towed on a winch extending from the carrier 5, a rail is temporarily installed on the two water-impervious sheets 1 and 2 sunk in the water bottom ground 3, and the tow-type or self-propelled on the rail A method of moving the welding unit 10 in a formula, a method of attaching a crawler to the welding unit to make it self-run, a method of moving the welding unit 10 using magnetic force, and the like correspond to this.
[0026]
【The invention's effect】
As described above in detail, according to the underwater sheet connecting device according to the present invention, after the two impermeable sheets to be connected are laid, both side edges can be ultrasonically welded in water. The troublesome work of laying down the vast water-impervious sheet connected inside is eliminated, there is no danger of the sheet being damaged, and the workability and safety of sheet laying are improved.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing the overall structure of a sheet connecting apparatus according to the present invention.
FIG. 2 is a plan view showing the overall structure of the sheet connecting apparatus.
FIG. 3 is a cross-sectional view in the width direction showing the overall structure of the sheet connecting apparatus.
FIG. 4 is a perspective view schematically showing a structure of a jig plate constituting the sheet connecting apparatus.
FIGS. 5A and 5B are a front view and a side view showing the shape of an ultrasonic welding horn used in the sheet connecting apparatus. FIGS.
FIG. 6 is a schematic view showing an embodiment of a sheet laying method performed using the sheet connecting apparatus.
FIG. 7 is an explanatory diagram showing an operation of the sheet connecting apparatus.
FIG. 8 is a schematic view showing a state of forming an ultrasonic weld line by the sheet connecting apparatus.
FIG. 9 is a plan view showing another embodiment of rotating means for converting the attitude of a horn constituting the ultrasonic welder.
10 is a side view of the rotating means shown in FIG. 9. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1, 2 Water shielding sheet 10 Welding unit 11 Jig plate 12 Ultrasonic welding machine 13 Pressing device 14, 15 Guide path 16 of water shielding sheet 16 Sheet receiving surface 17 Sheet welding path 18 Joint flow path 30 Ultrasonic vibrator 31 Ultrasonic welding Machine cone 32 ultrasonic welder horn 33 pressing cylinder 35 waterproof case 38 rotating motor (rotating means)
41 Cylinder for pressing 43 Pressing plate 45 of the pressing device Injection nozzle 50 Drive unit (drive means)
54 Driving cylinder 62 Pressing cylinder 70 Rotating cylinder (rotating means)

Claims (4)

A welding unit in which an ultrasonic welding machine is mounted on a jig plate having a sheet receiving surface that is received in a state in which the side edges of two water-impervious sheets to be connected are superposed with each other, and the welding unit are moved. An ultrasonic welding machine for the welding unit, the horn extended from the ultrasonic vibrator disposed in the waterproof case is moved forward and backward with respect to the sheet receiving surface of the jig plate, and the two sheets The superposed portion of the water shielding sheet is ultrasonically welded, and the jig plate of the welding unit has two water shielding sheets to be connected up and down on the front portion in the moving direction from the sheet receiving surface. Two guide paths for guiding separately, and a joining channel for joining the two guide paths on the sheet receiving surface, and the two water shielding sheets to be connected are welded by the driving means. As the unit moves Underwater sheet connecting device, characterized in that sliding on serial sheet receiving surface. 2. The underwater sheet connecting device according to claim 1, wherein a pressing device for pressing a water shielding sheet around a horn of an ultrasonic welder against a sheet receiving surface is mounted on a jig plate of a welding unit . The underwater sheet connecting apparatus according to claim 1 or 2, wherein the welding unit is provided with rotating means for rotating the ultrasonic welding machine by a predetermined angle around its axis . The underwater sheet connecting device according to any one of claims 1 to 3, wherein the welding unit is provided with an injection nozzle for injecting cleaning water into a joint flow path of the jig plate .

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