JP3304608B2 - Tarp joining equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a new waterproofing sheet when a waterproofing sheet is laid between a ground around an underground pit excavated by a shield machine and a segment so as to surround the outer periphery of the segment. It is used for a waterproofing sheet laying method in which the adjacent edges are wrapped in a tail plate while being wrapped in a tubular existing waterproof sheet, and the wrapped portions are joined together to build up a waterproof sheet. The present invention relates to a waterproof sheet joining apparatus for joining wrapped portions.

[0002]

2. Description of the Related Art When excavating an underground pit by using a shield excavator, a shield jack is used to excavate a face with a cutter head in front of the shield main body while applying thrust to the shield main body. After excavating the underground pit of the specified unit length in this way, while adding the new segment to the existing segment lined with the already dug underground pit,
The segment is assembled in an annular shape along the inner surface of the tail plate forming the rear part of the shield main body with a predetermined gap from the inner surface. That is, the segment is assembled between the excavated underground pit and the surrounding ground. After assembling the new segment, the shield jack is again used to apply thrust to the shield body to excavate an underground pit having a predetermined unit length, and assemble the new segment in the same manner. In the operation of excavating an underground mine by using a shield excavator, such a process is repeated a number of times, and a new segment is added to an existing segment, so that seams are formed at various places in the assembled segment. The joints between these segments are usually sealed with a sealing material to prevent intrusion of groundwater from the ground. However, there is a risk that groundwater will enter due to deterioration of the sealing material and cracks in the segments. For this reason, various techniques for laying a waterproof sheet in a tubular shape so as to cover the outer periphery of an existing segment between the excavated underground pit and the surrounding ground have been proposed. Among the technologies proposed in the past, a technology that is practically preferable is that a new waterproof sheet to be newly laid is formed in a tubular shape while being wrapped around the edge of the existing waterproof sheet already laid. In this method, a new waterproof sheet is sequentially added to an existing waterproof sheet by winding the wrap portion and joining the wrap portions. In such a method, the rear edge of the newly installed waterproof sheet must be joined to the front edge of the existing cylindrical waterproof sheet that wraps the new waterproof sheet. Equipment is required. Therefore, a waterproof sheet joining apparatus to meet such a demand has been conventionally devised, and as an example,
A water-impermeable membrane bonding apparatus described in Japanese Utility Model Laid-Open No. 72400/1987 can be used. The present invention seeks to improve the waterproof sheet joining device for joining the cylindrical wrap portions described in this publication to one having excellent practicability.

The technical contents of the waterproof sheet joining apparatus described in this publication will be described below with reference to FIGS. 5 and 6. FIG. 5 is a longitudinal sectional view of a main part of a shield machine in which a conventional waterproof sheet bonding apparatus is installed, and FIG. 6 is a VI-V of FIG.
It is an I line sectional view. In describing the technical contents of this conventional apparatus, the terms and reference numerals used in this publication are not used as they are, but the present invention will be described as much as possible in order to clarify the correspondence with the present invention. Of the present embodiment.

5 and 6, reference numeral 1 denotes a shield body having a cutter (not shown) at a front portion, 2 denotes a ring girder for reinforcing the shield body 1, and 6 denotes an existing segment 10 to be described later via a jack spreader. A shield jack for propelling the shield body 1 while taking a reaction force,
9a is an existing waterproof sheet laid in a tubular shape so as to cover the outer periphery of the existing segment 10, which will be described later. 9b is a new tubular waterproof sheet that has just been added to the existing waterproof sheet 9a, and 10 is a shield. This is an existing segment in which an underground mine excavated by an excavator is lining. The segment 10 is assembled by excavating the underground pit by a predetermined unit length, that is, one excavation length by a shield excavator, and then leaving a predetermined gap from the inner surface of the tail plate forming the rear part of the shield main body 1 along the inner surface. Therefore, the existing waterproof sheet 9
a is laid in a tubular shape so as to cover the outer periphery of the segment 10. A new tarpaulin 14 is joined and added to the tarpaulin 9b while wrapping the edges, and the segments are thus joined to the new tarpaulin 1
After 4 is added, it is assembled inside the waterproof sheet 9b. FIG. 5 shows that after a new waterproof sheet 9b is joined to and added to the existing cylindrical waterproof sheet 9a, the shield body 1 is propelled by one excavation length, and on the inner peripheral side of the waterproof sheet 9b, This means that a new segment has not been assembled yet. Newly installed tarpaulin 14
The rear edge is wrapped in a tubular shape while being wrapped around the front edge of the waterproof sheet 9b, the ends are joined together, and the annular wrap portion X at the edge and the seam Y at the end are joined to each other. Formed into a shape. When assembling segments,
Using an erector not shown, add a new segment
The tail plate is added to the existing segment 10 while being positioned in the axial direction or the radial direction of the tail plate. After assembling the new segment, the shield jack 6 again applies thrust to the shield body 1 to excavate an underground pit having a predetermined unit length, and assemble the new segment in the same manner. In the excavation work of the underground mine by the shield excavator, such a process is repeated many times and the new segment is added to the existing segment 10 to proceed. The joining of the waterproof sheet 9b and the new waterproof sheet 14 is performed each time such a process is repeated, so that groundwater does not enter the joints and cracks of the segments 10. The waterproof sheet joining device is used when such joining is performed.

[0005] The joining device for the waterproof sheet is described below. Reference numeral 3 denotes a revolving ring in which an internal gear 13 meshing with the pinion 11 is formed. The rotational force of the motor 12 is generated by the pinion 11 and the internal gear 13. The rotational force transmitted through the gear transmission mechanism and reduced in speed is applied. Reference numeral 21 denotes a support frame projecting from the ring girder. Reference numeral 22 denotes a guide roller provided on the support frame 21 for guiding the revolving ring 3 while contacting the inner peripheral portion thereof. The guide roller 22 pivots as shown in FIG. A plurality of rings 3 are provided in the circumferential direction. Numeral 23 denotes a waterproof sheet joining machine attached to the swivel ring 3, which orients an annular wrap portion X between the rear edge of the newly installed waterproof sheet 14 and the front edge of the cylindrical waterproof sheet 9b in the course of laying in the circumferential direction. It is a joining machine for joining. The conventional waterproof sheet joining apparatus is roughly composed of a joining machine 23 for joining the annular wrap portion X and a revolving ring 3 that is rotationally driven by the motor 12 via the pinion 11 and the internal gear 13. I have.

Reference numeral 24 denotes a waterproof sheet joining machine slidably provided on a guide rail 25 provided in the axial direction of the shield main body 1, and is a known screw feeder which feeds a screw by rotating a screw shaft 27 by a motor 26. By the mechanism, guide rail 2
5 is a joining machine that moves back and forth while being guided by 5 and joins the seam Y at the end. To make sure,
The waterproof sheet joining apparatus provided with the joining machine for joining the seam Y at the end is not a joining apparatus to be improved by the present invention.

Since the conventional waterproof sheet joining apparatus has the above-described configuration, when the motor 12 is driven to rotate, the rotation is transmitted via a gear transmission mechanism including the pinion 11 and the internal gear 13. Transmitted to the swivel ring 3,
The turning ring 3 rotates at a reduced speed while being guided by the guide roller 22. Then, the joining machine 23 attached to the turning ring 3 turns with the rotation to sequentially join the annular wrap portions X in the circumferential direction, and the turning ring 3 makes one rotation. Then, the entire circumference of the annular wrap portion X is joined.

[0008]

According to the conventional waterproof sheet joining apparatus, when joining the annular wrap portion of the existing waterproof sheet and the new waterproof sheet in this way, even the swivel ring is operated. It seems as if the joining can be done automatically only by manipulating the machine, but in reality this cannot be done without human assistance. In other words, the waterproof sheet is flexible and easily expands and contracts, and irregularities and sagging are likely to occur.Therefore, even if the edges of the existing waterproof sheet and the newly installed waterproof sheet are wrapped, it is hardly hoped that the waterproof sheet is wrapped in close contact. However, it is practically impossible to perform good joining with a conventional waterproof sheet joining apparatus. For this reason, when joining the lap portions, it is necessary to manually bring the joining portions into close contact with each other, which not only has a problem in work efficiency but also cannot save labor. Also, when joining the waterproof sheet, there is an appropriate joining speed determined by the type of the joining machine and the waterproof sheet, the joining location, etc., but in the conventional joining apparatus, the joining speed is determined by the rotation speed of the motor 12. Therefore, it cannot be said that proper bonding of the waterproof sheet is necessarily performed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in the prior art, and has been sought to improve the problem. In the case where an existing waterproof sheet is joined to an annular wrap portion of a new waterproof sheet, the conventional technique is applied. The purpose of the present invention is to provide a waterproof sheet joining apparatus which can be automatically joined only by operating a machine without actually requiring human support unlike the waterproof sheet joining apparatus of the present invention. To

[0010]

SUMMARY OF THE INVENTION An object of the present invention is to provide a waterproof sheet between a ground around an underground pit excavated by a shield machine and a segment so as to surround the outer periphery of the segment. When laying in a shape, the new waterproof sheet is wound around the existing tubular waterproof sheet while wrapping adjacent edges together in the tail plate, and joining the wrapped parts A waterproofing sheet joining device used for a method of laying a waterproof sheet to be added and joining the wrapped portions, wherein the lapping portion is joined while sandwiching a sheet-like material to be wrapped and running independently. A self-propelled joining machine, a joining machine support member for supporting the joining machine and positioning the wrap portion of the new waterproof sheet and the existing waterproof sheet at a position where the lap portion can be joined, and A drive mechanism that can rotate the welding machine support member along the inner peripheral surface of the tail plate to adjust the swing speed, and is attached to the welding machine support member, and when the welding machine is self-propelled, the welding machine supports the welding machine. And a guide means for guiding a predetermined distance so as not to be separated in the turning direction of the waterproof sheet ". A joining device for a waterproof sheet as described in claim 1 of the claim, When laying a waterproof sheet in a tubular shape so as to surround the periphery of the segment between the excavated underground pit and the surrounding ground, the new waterproof sheet is attached to the existing tubular waterproof sheet. It is used in a method of laying a waterproof sheet that is wound up while wrapping adjacent edges together in a tail plate, and is joined by joining the wrapped portions. A joining device for a waterproof sheet for joining laid parts, comprising sliding means for allowing sliding in a downward direction in both forward and reverse postures, while wrapping a sheet-like object to be wrapped while self-propelled. Self-propelled joining machine for joining parts to be joined, a joining machine support member for supporting the joining machine and positioning the wrap portion of the newly installed waterproof sheet and the existing waterproof sheet at a position where the lap section can be joined, and a joining machine support A drive mechanism that can rotate the member along the inner peripheral surface of the tail plate and adjust the rotation speed, and is attached to the welding machine support member, and at least when the welding machine support member is rotating at the upper position. And a guide member having a guide surface on the side of the tail plate that contacts and guides the joining machine in the direction of its rotation. " This can be achieved by any of the cage tarp joining devices.

[0011]

Since the waterproof sheet joining apparatus according to the first aspect of the present invention has the above-described structure, after the shield excavator has been excavated by one excavation length, the newly installed waterproof sheet is formed into an existing tubular one. While the waterproof sheet is wrapped and wound in the tail plate, the swivel ring is driven to rotate to rotate the splicer support member along the inner peripheral surface of the tail plate, and self-propelled joining is performed. When the lap portion of the waterproof sheet is sandwiched by the machine and then driven to rotate, the self-propelled joining machine performs joining while self-propelled in a state where the joining machine support member is rotating. If the rotational speed of the drive mechanism and the self-running speed of the joining machine do not match in the case of performing the joining in this manner, the guide mechanism guides the joining mechanism so as not to fall back and forth. If the adjustment is made so as to match the self-propelled speed of the machine as much as possible, the joining work of the waterproof sheet can be performed without any trouble. That is, even if the rotational speed of the drive mechanism and the self-running speed of the welding machine do not slightly match, if the speed of the drive mechanism is adjusted so that the movement of the welding machine support member follows the movement of the welding machine. The joining machine performs good joining without falling off.

Since the waterproof sheet joining apparatus according to the second aspect of the present invention has the above-described structure, the self-propelled joining machine performs the joining while the self-propelled joining machine is traveling by itself. When located at the lower part of the main body, the welding machine slides on the tail plate of the shield body by the sliding means on one side and self-propelled, which is almost the same as a normal use mode of the self-propelled welding machine. Perform joining work without any trouble. When joining work from such a state toward the middle part of the shield main body, the joining machine self-runs with its rotational force while holding the wrap portion of the waterproof sheet in close contact, up to a certain point, It travels by itself while being supported and guided by the tail plate via the sliding means. Then, the sliding means is separated from the tail plate, and the other sliding means gradually approaches the guide member and comes into contact with the guide member at an intermediate portion of the shield body. During this time, the joining machine takes a natural posture of climbing in a direction substantially opposite to the direction of its own weight while opposing its own weight, so it will fall as long as its clamping force and rotational force are adjusted to appropriate values. The joining operation can be performed without any problem. When the joining operation proceeds from the middle part to the upper part of the shield main body, the joining machine moves upward while being supported and guided by the guide member because the sliding means is already in contact with the guide member. Reach the top of the shield body. In the meantime, similarly to the apparatus of the first aspect, even if the rotational speed of the drive mechanism and the self-running speed of the welding machine do not slightly match, the drive mechanism of the welding machine support member follows the movement of the welding machine. If the speed is adjusted, the joining machine performs a good joining without falling off. At the upper part of the shield body, the joining machine takes a position completely opposite to that at the time of self-running at the lower part, comes into contact with the sliding means and is placed on the guide member, and is placed on the guide member via the guide member. As a result, it is completely supported by the joining machine support member.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 to 4 and FIGS. FIG. 1 is a side view showing an internal structure of a shield machine in which a waterproof sheet joining apparatus according to a first embodiment of the present invention is installed, FIG. 2 is a view taken along the line II-II of FIG. 1, and FIG. FIG. 4 is a plan view showing the structure of a main part of a modification of the waterproof sheet joining apparatus according to the first embodiment of the present invention.
FIG. 7 is a schematic diagram for explaining a basic structure of a joining machine used for the waterproof sheet joining apparatus according to the embodiment of the present invention, and FIG. 7 is a diagram showing a main part of the waterproof sheet joining apparatus according to the second embodiment of the present invention. FIG. 8 is a plan view showing the structure, FIG.
FIG. 10 is a view showing a portion similar to FIG. 2 for explaining the operation of the waterproof sheet joining apparatus according to the second embodiment of the present invention.
Is a side view schematically showing a joining machine used for the waterproof sheet joining apparatus of the third embodiment of the present invention, FIG. 11 is a plan view of FIG. 10, and FIG. 12 is a third embodiment of the present invention. FIG. 13 is a cross-sectional view of a shield machine for explaining the operation of the waterproof sheet joining apparatus. FIG. 13 is a view showing the essentials when the waterproof sheet joining apparatus according to the third embodiment of the present invention is located at the position A in FIG. FIG. 14 is a cross-sectional view of the shield machine showing the state of the parts, FIG. 14 is a view similar to FIG. 13 when the waterproof sheet joining apparatus of the third embodiment of the present invention is located at the position A in FIG. 13 is a view similar to FIG. 13 in a case where the waterproof sheet joining apparatus according to the third embodiment of the present invention is located at the position C in FIG. 12, and FIG. 16 is a waterproof sheet joining apparatus according to the third embodiment of the present invention. FIG. 17 is a plan view showing a structure of a main part of a modification example with respect to FIG.
FIG. 2 is a sectional view taken along line II. In FIGS. 1 to 4 and FIGS. 7 to 17, the portions denoted by the same reference numerals as those in FIGS. 5 and 6 represent the same portions as those in FIGS. .

First, the technical contents of the waterproof sheet joining apparatus in the shield method according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 4. In the apparatus of the present embodiment, the waterproof sheet 9a is provided with a shield excavation. When laying in a tubular shape so as to cover the outer periphery of the segment 10 between the ground around the underground pit excavated by the machine and the segment 10, the new waterproof sheet 14 is replaced with the existing tubular waterproof sheet. It is used for a method of laying a waterproof sheet that is wound around the 9a while wrapping adjacent edges together in a tail plate and joining the wrapped portions, and joining the wrapped portions. This is the same as a conventional device.
The apparatus of the present embodiment has the turning ring 3 that is driven to rotate by the motor 12 via the pinion 11 and the internal gear 13 as in the conventional apparatus. The method of attaching the joining machine and the type of the joining machine are different. Therefore, first, a joining machine which is a prerequisite of the present invention will be described with reference to FIG.
This is a self-propelled joining machine that runs by sandwiching a sheet to be wrapped and joins the wrapped portion. In FIG. 4, reference numerals 8a and 8b denote a pair of holding rollers for cooperating and sandwiching the existing waterproof sheet 9a and the wrap portion of the new waterproof sheet, 8c an electric motor, and 8d the rotation of the electric motor 8c to the roller 8a. 8e is a joining terminal of a joining machine for thermally welding the wrap portion of the existing waterproof sheet 9a and the new waterproof sheet 9a. Therefore, in the joining machine 8 in FIG. 4, when the electric motor 8c is driven by sandwiching the wrap portion between the existing waterproof sheet 9a and the newly installed waterproof sheet with the pair of clamping rollers 8a and 8b, the roller 8a is rotationally driven. The joining machine 8 is self-propelled while holding the lap portion in close contact with each other, and thermally welds the lap portion with the joining terminal 8e. In this case, since the existing waterproof sheet 9a and the wrap portion of the new waterproof sheet are wrapped in close contact with each other and the joining machine 8 runs by itself, unlike the conventional apparatus, good joining can be performed and manual support is required. do not do. However, the joining machine 8 is usually used for joining the lap portion between the sheets placed in a horizontal state, and is formed in a flexible and tubular shape like the waterproof sheets 9a and 14 of the present embodiment. The joining of the wrap portion a of the sheet to be
As will be clear from the following description, it cannot be used because there is a risk of falling due to its own gravity. The greatest feature of the present invention is that such a joining machine 8 is devised so that it can be used for joining a waterproof sheet.

1 to 3, a configuration relating to this point will be described. In these figures, reference numeral 3 denotes a slewing ring which is rotationally driven by a mechanism similar to that of the conventional apparatus, as described above, and 4 denotes a slewing ring. Attached to the rear surface of the revolving ring 3 in the axial direction of the shield body 1,
The arm 5 as a joining machine supporting member formed in an arc shape along the arc of the swirl ring 3 is a roller attached to the ring girder 2 and rotatably supporting the swivel ring 3. Unlike the conventional device, the swing ring 3 is rotatably installed on the ring girder 2 and is installed so as to be able to rotate while passing through the gap between the inner surface of the tail plate and the shield jack rod 7. Therefore, when the arm 4 is mounted, the turning ring 3 drives the turning along the inner peripheral surface of the tail plate with the arm 4 positioned at a position closest to the inner peripheral surface of the tail plate. As a result, the arm 4 can also pivot while passing through the gap between the inner surface of the tail plate and the shield jack rod 7. When the arm 4 is attached to the swing ring 3, the arm 4 is attached to the swing ring 3 by fixing means that can be detachably attached to the swing ring 3. It can be removed from the swivel ring 3 as needed. The arm 4 supports the self-propelled joining machine 8 described above at its distal end, and its length is equal to the length of the newly installed waterproof sheet 14 and the existing waterproof sheet 9a when the joining machine 8 is thus supported.
Is set so that the joining machine 8 is located at a position where the lap portion a of the joining machine can be joined. According to the present invention, in order to allow the welding machine 8 to not only be supported by the arm 4 but also to be self-propelled while being guided by the arm 4 without being restrained by the arm 4, the guide means of the welding machine is provided. It has.

Referring to FIGS. 2 and 3, the guide means of the joining machine for the waterproof sheet joining apparatus according to the first embodiment of the present invention will be described. The guide means is provided at the distal end of the arm 4 for guiding. The welding machine 8 is supported by the arm 4 by inserting the rail 16 into the rail insertion hole of the base 15, comprising a rail 16 and a rail 15 through which the rail 16 is inserted. You can do so. When the welding machine 8 is supported by the arm 4 in this manner, the welding machine 8 can be slidably moved relative to the arm 4 in the turning direction of the arm 4. The rail 16 is fixed to the arm 4 via an inverted U-shaped frame 16a. The inverted U-shaped frame 16a is connected to the rail 1 by the weight of the joining machine.
It also acts as a stopper to prevent the joining machine from falling out of the joint 6. Therefore, the base 15, the rail 16, and the inverted U-shaped frame 16a cooperate with each other,
It also has a function of guiding the joining machine 8 so as to be slidable in the turning direction with respect to the arm 4 and not to fall.

Since the waterproof sheet joining apparatus of the present embodiment has the above-described configuration, the new waterproof sheet 14 is attached to the existing tubular waterproof sheet 9a after the shield excavator has made one excavation and long excavation. On the other hand, in a state of being wrapped and wound in the tail plate, the turning ring 3 is rotationally driven by the motor 12 via the pinion 11 so that the arm 4
Is rotated along the inner peripheral surface of the tail plate, and the wrap portion a of the waterproof sheets 9a and 14 is sandwiched between the pair of holding rollers 8a and 8b.
Is driven to rotate the roller 8a, the self-propelled joining machine 8 performs the heat welding while running by itself while the turning ring 3 is turning. If the rotational speed of the swing ring 3 and the self-propelled speed of the joining machine do not match during the heat welding, the base 15 slides back and forth on the rail 16 and is likely to come into contact with the frame 16a. When this happens, the operator only has to change the speed of the turning ring 3. That is, even if the rotation speed of the swivel ring 3 and the self-running speed of the joining machine 8 do not match with each other, there will be no trouble in joining the waterproof sheet. Further, since the frame body 16a functions as a stopper, the joining machine 8 does not drop due to its own weight or the like during the joining operation. Therefore, according to the apparatus of the present embodiment, the joining machine 8 is self-propelled while wrapping the existing waterproof sheet 9a and the wrap portion of the new waterproof sheet 14 in close contact with each other. Joining can be performed and no manual support is required.

FIG. 3 shows a further automated waterproof sheet bonding apparatus as described above. 3, the position detecting means 17 such as a stroke meter for detecting the position of the base 15 on the rail 16 is attached to the arm 4, and the position detecting means 17 detects the position of the base 15 on the rail 16. By doing so, the deviation of the detected position from the center point of the rail 16 is calculated, the rotation speed of the motor 12 is controlled so that the deviation becomes zero, and the rotation speed of the swing ring 3 is controlled by the self-propelled Try to keep it consistent with speed. In that case, the motor 12
It is good to drive with a variable displacement hydraulic pump using a hydraulic motor. By performing such control, the joining machine 8 can be always positioned at the center of the rail 16.

The guide means of the welding machine shown in FIGS. 2 and 3 guides the welding machine 8 so as to be able to run in its turning direction without being restrained by the arm 4, but has a defined circular orbit. The welding machine 8 is guided so that it can only move by itself, and does not allow the joining machine 8 to change its position in the axial direction of the shield body in the process of self-running. Therefore, the guide means of the joining machine which enables such a change of position is provided in the second embodiment of the present invention.
7 and 8 show an embodiment. The guide means of the joining machine can be roughly classified into a rectangular frame 33 and a pair of frames which are slidably inserted into the slits 34 of the frame 33 and attached to the joining machine 8 and which are sufficiently longer than the short side of the frame 33. Bar 3
5 The rectangular frame 33 has a long side portion that is sufficiently longer than the front and rear lengths of the welding machine, and a short side portion that is formed to be somewhat wider than the left and right widths of the welding machine 8. The slit 34 is formed on the pair of long sides of the frame 33 so that the opening 34 a is located forward of the joining machine 8 in the traveling direction. .
The pair of bars 35 are attached to the joining machine 8 at intervals in the traveling direction. The joining machine 8 includes the pair of bars 3
5 is attached, and the bar 35 is connected to the opening 34 of the slit 34.
It is installed on the frame 33 by being inserted from the side a. In a state where the joining machine 8 is installed in this manner, the bar 35 can slide in the slit 34 of the frame 33 not only in the longitudinal direction of the slit 34 but also in a direction orthogonal to the slit 34. 33 can freely move in the direction of the long side and the direction of the short side. Since the bar 35 slides and moves not only in the length direction of the slit 34 but also in the horizontal direction perpendicular thereto, the bar 35 does not fall out of the slit by at least the maximum distance of the horizontal movement. Only the length of the short side of the frame 33 is made longer. Bar 3
If you do not want to lengthen 5 this way, you can
The bar 35 is slidably attached to the bar 35 itself. In this case, after the pair of bars 35 on which the joining machine 8 is mounted are inserted into the slits 34, retaining members are attached to both ends of each bar 34 in order to prevent the bars 35 from falling out of the slits 34. In this embodiment, when the joining machine 8 is installed on the frame 33, the slit 34 is provided with an opening 34a, and a bar 35 attached to the joining machine is inserted from the opening 34a side so that the joining machine 8 can be installed. However, as long as the joining machine 8 can be detachably attached to the bar 35, after inserting the pair of bars 35 into both slits from the lateral direction, the joining machine 8 is moved to the bar 35.
The slit 34 need not always be provided with such an opening 34a.

In the waterproof sheet joining apparatus of the present embodiment, since the joining machine support means is constructed in this manner, the rotation speed of the swivel ring 3 and the self-propelled movement of the joining machine 8 during the heat welding are performed. When the speeds do not match, the bar 35 slides back and forth in the slit 34 along its longitudinal direction. When the bar 35 comes into contact with the frame 33, these speeds are matched as much as possible in the first embodiment. The operator only has to adjust the rotation speed of the swivel ring 3 so as to cause the rotation. Further, in the actual joining work of the waterproof sheet, the position of the wrap portion a between the new waterproof sheet 14 and the existing waterproof sheet 9a may be shifted in the axial direction of the shield body 1 as shown in FIG. However, in the present embodiment, the bar 35
Slides not only in the longitudinal direction but also in the lateral direction in the slit 34, so that the joining machine 8 can be freely moved, particularly in the direction of the short side of the frame 33. Even when the lap portion a is displaced in the direction, the joining machine 8 does not hinder the self-running in the axial direction following the lap portion a in which the displacement has occurred. Therefore, according to the present embodiment, the lap portions a of the waterproof sheets 9a and 14 can always be joined at the center position of the lap portions a, and therefore, good joining can be performed regardless of the state of the lap portions a. This can be done automatically without human intervention.

The guide means of the welding machine 8 shown in the first and second embodiments of the present invention is for guiding the welding machine 8 in the turning direction of the arm 4 so that the welding machine 8 is connected and does not come off. Third Embodiment A guide means of a welding machine which guides the welding machine 8 in a state where the welding machine 8 is separated and independent without being coupled and can also be supported on the arm 4 will be described as a third embodiment with reference to FIGS. The guide means of the joining machine is an arc-shaped guide plate 31 attached to the arm 4 as shown by a reference numeral 31 in these figures, and has a rectangular shape in a plan view, and one long side thereof is an arm. 4 so as to be orthogonal. The guide plate 31 has a guide surface for guiding the welding machine 8 in the turning direction of the arm 4 on the tail plate side of the shield body 1, that is, on the side facing the inner surface of the tail plate. When such a guide plate 31 is used as a guide means of a joining machine,
As the self-propelled joining machine 8, a type as shown in FIGS. 10 and 11 is used. That is, regardless of the forward or reverse posture, the joining machine 8 is provided with the sliding roller 30 on the top side and the front and rear sides and the left and right sides thereof so that the lower side can slide on the opposed contact surface. Sliding rollers 30a are provided on the left and right as sliding means. A commercially available self-propelled welding machine 8 usually has a roller 30a already provided on the bottom side.
Is used for the joining device of the waterproof sheet, only the roller 30 is newly provided on the top side. When the rollers 30 on the top side are newly provided, brackets 36 for mounting roller shafts may be attached to both side surfaces of the top portion of the joining machine 8, and the rollers 30 may be respectively mounted on both end portions. The guide plate 31 is provided at a position where the sliding roller 30 of the joining machine 8 can come into contact with the guide surface when the joining machine 8 is set at a position where the lap portions a of the waterproof sheets 9a and 14 are joined.

Next, the operation of the waterproof sheet joining apparatus according to the third embodiment will be described with reference to FIGS. In order to join the wraps a of the waterproof sheets 9a and 14, the joining machine 8 needs to run by 360 ° along the annular shape of the wrap portion a. When the waterproof sheet joining apparatus of the third embodiment is located at the position a in FIG. 12, that is, at the lower part of the shield body 1 in such a process, the state shown in FIG. 13 is obtained. 14 is in the state shown in FIG. 14 when it is located at the middle part, and is shown in FIG. 15 when it is located in the position C in FIG. When the waterproof sheet joining device is located at the lower portion of the shield main body 1, the joining machine 8 has a normal posture, that is, the same normal posture as when joining the lap portion of the sheet in a horizontal state, as is apparent from FIG. Then, one of the rollers 30a for sliding slides on the tail plate of the shield body 1 while sliding, and joins the wrap portions a of the waterproof sheets 9a and 14. At this time,
The welding machine 8 is supported and guided by a tail plate away from the guide plate 31, and the arms 4 are rotating independently of each other while following each other with the welding machine 8. As described above, when the joining device for the waterproof sheet is located at the lower part of the shield body 1, the joining machine 8 performs the joining operation in substantially the same manner as the normal use mode of the self-propelled joining machine. No particular problem occurs. When the joining operation proceeds from such a state to the position of A in FIG.
The joining machine 8 self-runs with its rotational force while holding the wrap portions a of the waterproof sheets 9a and 14 in close contact with a pair of holding rollers 8a and 8b. Self-propelled while being supported and guided by the tail plate via the roller 30a. Then, this one roller 3
0a is separated from the tail plate, and the other sliding roller 30 gradually approaches the guide plate 31, and the guide plate 3 as shown in FIG.
Contact 1 During this time, the joining machine 8 is not supported by any of the tail plate and the guide plate 31, but takes a natural posture of climbing in a direction substantially opposite to the direction of its own weight while opposing its own weight. As long as is adjusted to an appropriate value, there is no danger of falling. Therefore, no particular problem occurs even in the process from when the waterproof sheet joining device is positioned at the middle portion to the lower portion of the shield body 1. When the joining operation proceeds from such a state toward the position C in FIG. 12, the joining machine 8 uses the guide plate 31 to support and guide the roller 30 since the roller 30 has already contacted the guide plate 31 at the position A. Then, the vehicle travels upward and reaches the position C in FIG. During this time, the operator matches the rotational speed of the swing ring 3 with the self-running speed of the joining machine 8 as much as possible,
The speed of the turning ring 3 is adjusted so that the movement of the guide plate 31 follows the movement of the welding machine 8. At the position of c in FIG. 12, that is, at the upper part of the shield main body 1, the joining machine 8 takes a completely opposite posture from that at the time of self-running at the lower part, and as shown in FIG.
, Comes into a state of being placed on it, and is supported by the arm 4 via the guide plate 30. Incidentally, since the waterproof sheets 9a and 14 are flexible and easily bent, when the weight of the joining machine 8 acts on the upper portion of the shield body 1, the waterproof sheets 9a and 14 are pulled downward at the front end portion of the existing segment 10 and bent. That is, the joining machine 8 bends in a direction perpendicular to the direction in which the joining machine 8 should run, and the joining machine 8 hangs on the waterproof sheets 9a and 14 in a twisted posture. If the self-propelled machine runs in such an unnatural state, the joining machine 8 not only fails to join the waterproof sheets 9a and 14 satisfactorily, but also falls. Such a problem occurs to a greater or lesser extent in the process in which the welding machine 8 is running on the upper half of the shield body 1 by itself. In this embodiment, the guide plate 31 is attached to the arm 4 to guide the welding machine 8. It does not occur because we support it. When the joining operation proceeds from the upper part of the shield body 1 to the lower part, the joining process follows the reverse process in the same state as described above, and the joining machine 8 performs good joining without falling off. In the waterproof sheet joining apparatus of the present embodiment, if the width of the guide plate 31 is set to be somewhat larger than the width of the joining machine 8 so that the joining machine 8 can be moved in the width direction, the shield body 1 can be moved. Even when the wrap portions a of the waterproof sheets 9a and 14 are displaced in the axial direction, similarly to the device of the second embodiment, the joining machine 8 is moved to follow the displaced wrap portions a and move the shield body 1 It can be made to run in the axial direction.

The apparatus shown in FIGS. 16 and 17 is a modification of the waterproof sheet joining apparatus according to the third embodiment of the present invention.
A side wall 32 is provided upright on the four circumferences of the guide plate 31. In the apparatus of the third embodiment, if the length and width of the guide plate 31 are set to a required length, and the rotation speed of the swing ring 3 is appropriately adjusted so as to match as much as possible the self-running speed of the welding machine 8, The joining machine 8 does not fall off, but the guide plate 31 has such side walls 32.
Is provided, even if an error occurs in the adjustment of the rotation speed of the swivel ring 3, the joining machine 8 can be prevented from running away by the side wall 32. Can be more reliably prevented from falling off.

In the waterproofing sheet joining apparatus according to the third embodiment or its modification described above, since the joining machine 8 is formed as an independent unit with respect to the guide means, installation and replacement thereof are extremely simple. Can be done. Further, the control means described with reference to FIG. 3 can be naturally applied to the second embodiment and the joining device of these waterproof sheets.

[0025]

As is apparent from the above description, the waterproof sheet joining apparatus is particularly provided with a self-propelled joining machine for joining a wrapped portion while sandwiching a sheet-like object to be wrapped and self-propelled. A joining machine support member for supporting the joining machine and positioning the wrap portion of the newly installed waterproof sheet and the existing waterproof sheet at a position where the lap portion can be joined, and turning the joining machine support member along the inner peripheral surface of the tail plate. A drive mechanism that can be driven to adjust the turning speed thereof, and a guide that is attached to the joining machine support member and guides the joining machine a predetermined distance so that the joining machine does not separate in the turning direction of the joining machine support member when the joining machine runs by itself. Or "Sliding means that can slide downward in both forward and reverse postures." And bonding machines Hashishiki, the bonding machine support member for locating the lap portion can be joined position tarpaulin tarpaulin and existing established in support of this joining machine,
A drive mechanism capable of rotating and driving the welding machine support member along the inner peripheral surface of the tail plate and adjusting the rotational speed thereof;
At least a guide member attached to the welding machine support member and having a guide surface on the tail plate side that comes into contact with the welding machine support member when the welding machine support member is turning at the upper position and guides the welding machine in the turning direction is provided. "
When joining the annular wrap of an existing tarpaulin and a new tarpaulin, there is no need for manual assistance like a conventional tarpaulin joining device, and it is automatically joined just by operating the machine. It is possible to provide a waterproof sheet joining device that can perform the above-mentioned operations and exhibits practically excellent performance. In particular, if the latter configuration is adopted, an effect that the installation and replacement of the joining machine can be performed extremely easily can also be achieved.

[Brief description of the drawings]

FIG. 1 is a side view showing an internal structure of a shield machine in which a waterproof sheet joining device according to a first embodiment of the present invention is installed.

FIG. 2 is a view taken in the direction of arrows II-II in FIG.

FIG. 3 is a plan view showing a structure of a main part of a modification of the waterproof sheet joining apparatus according to the first embodiment of the present invention.

FIG. 4 is a schematic diagram for explaining a basic structure of a joining machine used in the waterproof sheet joining apparatus according to the embodiment of the present invention.

FIG. 5 is a longitudinal sectional view of a main part of a shield machine in which a conventional waterproof sheet bonding apparatus is installed.

FIG. 6 is a sectional view taken along line VI-VI of FIG. 5;

FIG. 7 is a plan view showing a structure of a main part of a waterproof sheet joining apparatus according to a second embodiment of the present invention.

FIG. 8 is a view taken along line VIII-VIII in FIG. 7;

FIG. 9 is a view showing a portion similar to FIG. 2 for explaining the operation of the waterproof sheet joining apparatus according to the second embodiment of the present invention.

FIG. 10 is a side view schematically showing a joining machine used for a waterproof sheet joining apparatus according to a third embodiment of the present invention.

FIG. 11 is a plan view of FIG. 10;

FIG. 12 is a cross-sectional view of a shield machine for explaining the operation of the waterproof sheet joining apparatus according to the third embodiment of the present invention.

FIG. 13 is a cross-sectional view of a shield machine showing a state of a main part when the waterproof sheet joining apparatus according to the third embodiment of the present invention is located at the position A in FIG.

FIG. 14 is a view similar to FIG. 13 in a case where the waterproof sheet joining apparatus according to the third embodiment of the present invention is located at a position A in FIG. 12;

FIG. 15 is a view similar to FIG. 13 in a case where the waterproof sheet joining apparatus according to the third embodiment of the present invention is located at a position C in FIG. 12;

FIG. 16 is a plan view showing a structure of a main part of a modification of the waterproof sheet joining apparatus according to the third embodiment of the present invention.

17 is a sectional view taken along line XV11-XVII in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shield body 2 Ring girder 3 Revolving ring 4 Arm 5 Roller 6 Shield jack 7 Shield jack rod 8 Joining machine 9a Existing waterproof sheet 10 Existing segment 11 Pinion 12 Motor 13 Internal gear 14 Waterproof sheet 15 Base 16 Rail 17 Position detection Apparatus 30, 30a Roller for sliding 31 Guide plate 32 Side wall 33 Frame 34 Slit 35 Bar

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Shuichi Hara 1534-1 Yotsuku-cho, Nishinasuno-machi, Nasu-gun, Tochigi Prefecture Goyo Construction Co., Ltd. (72) Inventor Masafumi Iio, Nishinasuno-cho, Nasu-gun, Tochigi Prefecture 154-1 Ku-cho, Goyo Construction Co., Ltd. (72) Inventor Yukihisa Hirasawa 650, Kandate-cho, Tsuchiura-shi, Ibaraki Hitachi Construction Machinery Co., Ltd.- Tsuchiura Plant (72) Inventor Nobuyuki Maehara Otemachi 2 Chiyoda-ku, Tokyo No. 6-2, Hitachi Construction Machinery Co., Ltd. (56) References JP-A-3-224995 (JP, A) JP-A 62-72400 (JP, U) (58) Fields investigated (Int. Cl. ⁷⁾ , DB name) E21D 11/38

Claims (2)

(57) [Claims] When a waterproof sheet is laid in a tubular shape so as to surround an outer periphery of a segment, a new waterproof sheet is provided between a ground around the underground pit excavated by the shield machine and the segment. It is used for a waterproofing sheet laying method in which adjacent edges are wound around a tubular existing waterproofing sheet while being wrapped in a tail plate, and the wrapped portions are joined together to add a waterproofing sheet. A self-propelled joining machine that joins the wrapped portions while sandwiching a sheet-like material to be wrapped and self-propelled, and supporting the joining machine. A joining machine support member for positioning the new waterproof sheet and the wrap portion of the existing waterproof sheet so that the joining section can be joined, and the joining machine supporting member is turned along the inner peripheral surface of the tail plate. A drive mechanism that can rotate and adjust the turning speed thereof, and is attached to the joining machine supporting member, and guides the joining machine a predetermined distance so as not to separate in the turning direction of the joining machine supporting member when the joining machine runs by itself. A joining device for a waterproof sheet, comprising a guide means. 2. When a waterproof sheet is laid in a tubular shape so as to surround an outer periphery of a segment, a new waterproof sheet is installed between the ground around the underground pit excavated by the shield machine and the segment. It is used for a waterproofing sheet laying method in which adjacent edges are wound around a tubular existing waterproofing sheet while being wrapped in a tail plate, and the wrapped portions are joined together to add a waterproofing sheet. A waterproof sheet joining device for joining the parts that have been made, the sliding device having a sliding means for allowing sliding in a downward direction in both forward and reverse positions, while wrapping the sheet-like material to be wrapped while self-propelled. Self-propelled joining machine for joining parts to be joined, and joining to support this joining machine and position it so that the new waterproof sheet and the lap part of the existing waterproof sheet can be joined. Machine support member, a driving mechanism capable of rotating and driving the welding machine support member along the inner peripheral surface of the tail plate to adjust the swing speed, and being attached to the welding machine support member, at least the welding machine support member A joining device for a waterproof sheet, comprising: a guide member having a guide surface on a side of a tail plate for contacting and guiding a joining machine in a turning direction when the turning device is turned at a position.