JP2597900B2 - Set bolt type segment connection method and bolt socket - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial application field" This invention is used when connecting segments in shield work, and is a set bolt type segment connection in which bolts are set in advance to segments before connection. The present invention relates to a method and a bolt socket for holding the bolt when connecting the segments.

`` Conventional technology '' In general, the shield construction method applied when constructing a tunnel in a soft ground, while preventing the collapse of the ground with a skin plate that is the outer shell of the cylindrical shield machine,
The tunnel is formed by excavating the ground with a cutter device provided at the front of the shield machine.
While performing the primary lining of the tunnel by assembling an arc plate called a segment obtained by dividing the annular body into a predetermined thickness and a predetermined angle on the wall surface of the tunnel, a reaction force is applied to the tip of the assembled segment. The shield machine is pushed forward, and this is repeated to build a tunnel in the ground.

When assembling segments in such a shield construction method, a shield machine equipped with an automatic segment assembly robot is used.Conventionally, bolts and nuts are previously attached to a bolt fastening machine of the automatic segment assembly robot. I was trying to keep it.

"Problems to be Solved by the Invention" However, when the bolt and the nut are held in advance by the bolt fastening machine as described above,
Every time one segment is added to all bolt fastening machines of the segment automatic assembly robot, a large number of bolts and nuts necessary to connect the segment must be supplied by input, and the bolt And the supply of nuts must be performed in a fixed position (on the upper scaffolding of the shield), so that the segment assembling cycle required for adding one segment becomes longer and the segment assembling operation cannot be fully automated. There is.

In order to solve such a problem, it is conceivable to set bolts in advance in the bolt box of the segment before connection, but in that case, there is a possibility that the bolt may fall off or be eccentric during the movement of the segment. Therefore, there is a possibility that the bolt fastening operation may not be completely performed on all the joints.

The present invention has been made in view of the above circumstances, and is a set bolt capable of preventing a bolt from falling off or eccentric, which is likely to occur when a bolt is set on a segment before connection, and capable of smoothly performing a fastening operation of the bolt. It is an object of the present invention to provide a segment connecting method of the type and a bolt socket used in the segment connecting method.

[Means for Solving the Problems] The first set bolt type segment connecting method of the present invention is a method of connecting joint plates of joint fittings embedded in both joint end surfaces of segments to be joined together to form a bolt box. Before connecting the segments by fastening with bolts and nuts, before connecting each segment, insert a bolt with a fitting hole in the center of the head into the bolt hole of the joining plate from within the bolt box of one segment Then, place a positioning rod on the surface of the bolt box opposite to the joint plate, and insert the bolt into the bolt box by fitting the tip of the positioning rod into the fitting hole in the bolt head. Set, when connecting each segment, the joining plate of the other segment is brought into close contact with the joining plate of the one segment, Insert the nut runner holding the nut into the bolt box of the other segment, insert the bolt socket behind the bolt head in the bolt box of the one segment, and then insert the bolt socket into the bolt head. After gripping the bolt head by moving it toward the other direction, the nut is rotated by the nut runner while pushing the tip of the bolt into the bolt hole of the other segment by further moving the bolt socket in that direction. The nut is fastened to the bolt.

Further, the bolt socket of the present invention is inserted into the bolt box of one of the segments when fastening the fittings which are buried in the joint end faces of the segments to be joined to each other to form a bolt box with bolts and nuts. A bolt insertion portion formed on the front surface of the bolt socket body, and a movable wrench mounted rotatably behind the bolt insertion portion. And a notch for allowing the positioning rod to pass through the bolt insertion portion of the bolt socket body and the movable wrench.

Further, in the second set bolt type segment connecting method of the present invention, the joints of the respective fittings embedded in both joint end faces of the segments to be joined to each other to form a bolt box are fastened with bolts and nuts. Before connecting the segments, a guide hole in which a pipe made of an elastic material is provided is provided on the surface of one of the segments opposite to the joining plate in the bolt box before connecting the segments. A bolt having a fitting hole at the center of the head is inserted into the bolt hole of the joining plate from the bolt box and temporarily placed, and then a guide rod is inserted into the guide hole, and the head of the bolt is inserted into the tip of the guide rod. The bolts are set in the bolt box by fixing the parts, and when connecting the segments, The joining plate of the other segment is brought into close contact with the joining plate of the other segment, the nut runner holding the nut is inserted into the bolt box of the other segment, and the bolt socket is inserted into the bolt box of the one segment. The bolt head is fitted into the bolt socket, and then the bolt socket is moved in the axial direction of the bolt, so that the guide rod holding the bolt is pulled out of the guide hole so that the tip of the bolt is connected to the other segment. The nut is fastened to the bolt by rotating the nut with the nut runner while pushing into the bolt hole.

[Operation] In the case where segments are connected by the first set bolt type segment connecting method of the present invention, the bolts of the respective joining plates on the joining end faces to be joined to the already assembled segments are added to the segments before the connection. In the hole, a bolt with a fitting hole in the center of the head is inserted from the inside of the bolt box and temporarily placed, then a positioning rod is attached to the surface of the bolt box opposite to the joining plate, and the tip of the positioning rod is The bolt is set in the bolt box by fitting it into the fitting hole of the bolt head. And, in this way, bolts are set in advance for a large number of segments, and by supplying those segments one by one, the joining end faces of the segments are
The assembled segments are brought into contact with the joining end faces, and the joining plates of the respective segments are brought into close contact with each other.

Then, after the joining plates are brought into close contact with each other in this manner, when joining the joining plates, for example, using a bolt fastening machine equipped with a bolt socket of the present invention, in that case, already assembled Insert the nut runner holding the nut into the bolt box of the segment, and insert the bolt socket of the present invention from the cut into the bolt socket inside the bolt box of the segment where the bolts are set as described above. The locating rod is inserted to pass through, thereby positioning the bolt socket behind the bolt head in the bolt box. After this, the bolt socket is moved toward the bolt head, and at this time, the movable wrench of the bolt socket is rotated so as to match the phase angle of the bolt head. After the bolt is inserted into the movable wrench from the bolt insertion portion and the bolt head is gripped, the movable wrench is further rotated to remove the bolt head from the positioning rod. After gripping the bolt head with the bolt socket in this way, by moving the bolt socket toward the bolt hole of the joining plate, inserting the bolt into the bolt hole, and rotating the nut with the nut runner. A nut is fastened to the bolt.

Further, in the case where segments are connected by the second set bolt type segment connecting method of the present invention, each bolt located on the joint end face to be joined to the already assembled segment is connected to the segment before connection. A guide hole incorporating a pipe made of an elastic material is provided on the surface opposite to the joining plate in the box, and then a fitting hole is provided at the center of the head in the bolt hole of the joining plate from within the bolt box. A bolt is inserted and temporarily placed, then a guide rod is inserted into the guide hole, and the head of the bolt is fixed to the tip of the guide rod, so that the bolt is set in the bolt box. And
In this way, bolts are set in advance for a large number of segments, and the segments are supplied one by one. Closely attach the joining plates of the segments.

Then, after joining the joining plates in this manner, when joining the joining plates together, insert the nut runner holding the nut into the bolt box of the already assembled segment, and as described above. Then, insert the bolt socket into the bolt box of the segment where the bolt is set, fit the bolt head into the bolt socket, and then move the bolt socket toward the bolt hole of the joining plate, and By pulling out the fixed guide rod from the guide hole and inserting it into the bolt hole of the bolt while regulating the moving direction of the bolt, and rotating the nut with the nut runner at this time, Tighten the nut to the bolt.

Embodiment A first embodiment of the present invention will be described below with reference to FIGS.

In FIGS. 1 to 4, reference numeral 17 denotes a joint fitting buried in the joint end of the segment 5 to form a bolt box 16, reference numeral 18 denotes a bolt hole formed in the joint plate 11 of the joint fitting 17, Is a bolt inserted into the bolt hole 18, and 20 is a fitting hole formed at the center of the head of the bolt 19.

When the segments 5 and 5 are connected by the set bolt type segment connecting method of this embodiment, first,
As shown in FIG. 1, a nut 21 is mounted at a position facing the bolt hole 18 of the joining plate 11 in the bolt box 16 and a washer 22 and a sealing material 23 are attached to the bolt 19. 19 is temporarily inserted into the bolt hole 18 from inside the bolt box 16. Thus bolt 19
Then, as shown in FIG. 2, a positioning rod 24 is attached to the nut 21 and the tip of the positioning load 24 is directed to the bolt hole 18. After doing so, as shown in FIG.
Is screwed into a screw hole 20 (fitting hole) in the head of the bolt 19 to set the bolt 19 in the bolt box 16. In this way, the bolts 19 are set in advance in the bolt boxes 16 of the many segments 5 and the segments 5 are supplied one by one, so that the joint end faces of the segments 5 are already assembled. The joining plates 11 of the segments 5 and 5 are brought into close contact with each other by abutting the joining end faces of the segments 5 thus obtained.

Then, after the joining plates 11 are brought into close contact with each other in this manner, when joining the joining plates 11, the bolt socket 25 as shown in FIGS. 5 and 6 is used.

In the bolt socket 25, a bolt insertion portion 27 is formed on the front surface of the bolt socket body 26, and a movable wrench 28 is rotatably mounted behind the bolt insertion portion 27, and the movable wrench 28 is rotated. Gear mechanism 29
And notches 30 and 31 for allowing the positioning rod 24 to pass therethrough are provided in the bolt insertion portion 27 of the bolt socket body 26 and the movable wrench 28.

When joining the joining plates 11 using the bolt socket 25, as shown in FIG. 4, a nut runner 33 holding a nut 32 is inserted into the bolt box 16 of the already assembled segment 5, and The bolt socket 25 is cut into the bolt box 16 of the segment 5 in which the bolt 19 is set as described above,
From the positioning rod 24 to the inside of the bolt socket 25
And the bolt socket 25 is positioned behind the head of the bolt 19 in the bolt box 16. After doing so, the bolt socket 25 is moved toward the head of the bolt 19, and at that time, the movable wrench 28 of the bolt socket 25 is rotated to match the phase angle of the head of the bolt 19. After inserting the head of the bolt 19 from the bolt insertion portion 27 into the movable wrench 28 and grasping the head of the bolt 19, the movable wrench 28
The head of the bolt 19 is removed from the positioning rod 24 by rotating. After gripping the head of the bolt 19 with the bolt socket 25 in this manner, the bolt socket
While inserting the bolt 19 into the bolt holes 18, 18 by moving 25 toward the bolt holes 18, 18 of the joining plate 11, 11,
The nut 32 is fastened to the bolt 19 by rotating the nut 32 with the nut runner 33.

Next, a second embodiment of the present invention will be described with reference to FIGS.

When connecting the segments 5 by the set bolt type segment connecting method of this embodiment, first, the seventh
As shown in the figure, a guide hole 35 in which a pipe-shaped elastic body 34 is incorporated is provided at a position facing the bolt hole 18 of the joint plate 11 in the bolt box 16 and the bolt
With the washer 22 and the sealing material 23 attached to the bolt 19, the bolt 19 is inserted from the bolt box 16 into the bolt hole 18 and temporarily placed. After the bolts 19 have been temporarily placed in this way, as shown in FIG.
Insert the guide rod 36 so that the tip of the guide rod 36 faces the bolt hole 18 of the joining plate 11,
The bolt 19 is fixed by screwing the screw hole 20 of the head of the bolt 19 into a.
Set it in 16. The sectional shape of the guide hole 35 may be circular or square as shown in FIGS. 10 (a) and 10 (b). And in this way,
The bolts 19 are set in advance in the bolt boxes 16 of the many segments 5, and the segments 5 are supplied one by one, so that the joining end surfaces of the segments 5 are changed to the joining end surfaces of the already assembled segments 5. The joining plates 11 of the segments 5 and 5 are brought into close contact with each other.

Then, after the joining plates 11 are brought into close contact with each other in this way, when joining the joining plates 11, the bolt socket 25a as shown in FIGS. 11 and 12 is used.

The bolt socket 25a is different from the bolt socket 25 used in the first embodiment in that it does not grip the head of the bolt 19, and simply fits the head of the bolt 19 from the side to rotate the bolt 19. Is to be regulated.

When joining the joining plates 11 using this bolt socket 25, as shown in FIG. 9, a nut runner 33 holding a nut 32 is inserted into the bolt box 16 of the already assembled segment 5, and Then, the bolt socket 25a is inserted into the bolt box 16 of the segment 5 in which the bolt 19 is set as described above, the head of the bolt 19 is fitted into the bolt socket 25a, and then the bolt socket 25a is bolted to the joint plate 11. The guide rod is fixed to the bolt 19 by being moved toward the hole 18.
The bolt 19 is pulled out from the guide hole 35 and the bolt 19 is inserted into the bolt hole 18 while regulating the moving direction of the bolt 19, and at this time, the nut 32 is rotated by the nut runner 33. Thus, the nut 32 is fastened to the bolt 19.

The guide hole 35 and the guide rod
When fastening the bolt 19 using the 36, when fixing the head of the bolt 19 to the tip of the guide rod 36, the bolt 19
Although it is desirable to make the phase angle of the head almost constant, even if there is a slight shift, the phase angle can be made uniform by inserting the bolt socket 25a, so that there is no problem in fastening the bolt 19. When the cross-sectional shape of the guide hole 35 is square as shown in FIG. 10 (b), the bolt 19 can always be set at a constant phase angle.

In addition, in the segment connecting method of the set bolt type of this embodiment, by using the bolt socket 25b as shown in FIGS. 14 and 15, a plurality of joining plates 11 as shown in FIG. Even when the two bolts 19 are fastened, the bolts 19 can be fastened simultaneously.

According to the first set bolt type segment connecting method of the present invention, before connecting each segment, from inside the bolt box of one segment to the bolt hole of the joining plate,
Insert a bolt with a fitting hole in the center of the head and temporarily place it,
Next, a positioning rod is attached to the surface of the bolt box opposite to the joining plate, and the bolt is set in the bolt box by fitting the tip of the positioning rod into a fitting hole of the bolt head. When connecting the segments, the joining plate of the other segment is brought into close contact with the joining plate of the other segment, a nut runner holding a nut is inserted into the bolt box of the other segment, and the bolt of the one segment is connected. After inserting the bolt socket behind the bolt head in the box, and then moving the bolt socket toward the bolt head to grip the bolt head, the bolt socket is further moved in that direction to move the bolt socket. Turn the nut with the nut runner while pressing the tip of the bolt into the bolt hole of the other segment. Since fastening a nut to the bolt by, it can achieve excellent effects as follows.

Since the bolt is installed in a fixed position, it is easy to grasp with a bolt socket.

Since the set bolt system is used, it is not necessary to supply a bolt to the segment each time one segment is connected, so that the structure of the automatic segment assembling robot can be simplified.

Since it is fixed to the tip of the bolt positioning rod, it does not easily fall off.

According to the bolt socket of the present invention, the bolt insertion portion is formed on the front surface of the bolt socket body, and the movable wrench is rotatably mounted behind the bolt insertion portion, and the movable wrench is rotated. Since the gear mechanism is provided to rotate the movable wrench in accordance with the phase angle of the bolt head, the bolt head can be securely gripped. Since the notch for passing the positioning rod to the movable wrench is provided,
At the time of insertion into the bolt box, the positioning rod can be reliably inserted by passing through the cut.

According to the second set bolt type segment connecting method of the present invention, before connecting each segment, a pipe made of an elastic material is provided on the surface of one of the segments opposite to the joining plate in the bolt box. A built-in guide hole is provided, and then a bolt having a fitting hole at the center of the head is inserted into the bolt hole of the joining plate from the inside of the bolt box and temporarily placed, and then a guide rod is inserted into the guide hole. Then, by fixing the head of the bolt to the tip of the guide rod, the bolt is set in the bolt box, and when connecting each segment, one of the segments is connected to the joining plate by the other segment. Closely attach the joining plate, insert the nut runner holding the nut into the bolt box of the other segment, and Insert the bolt socket into the bolt box, fit the bolt head into the bolt socket, and then move the bolt socket in the axial direction of the bolt to pull out the guide rod fixing the bolt from the guide hole. Thus, the nut is fastened by rotating the nut with the nut runner while pushing the tip of the bolt into the bolt hole of the other segment, so that the following excellent effects can be obtained.

Since there is no need to install bolts on the segment automatic assembly robot, the segment assembly time can be reduced.

Since the bolt is installed in a fixed position, it is easy to grasp with a bolt socket.

Since the set bolt system is used, it is not necessary to supply a bolt to the segment each time one segment is connected, so that the structure of the automatic segment assembling robot can be simplified.

Since the guide rod regulates the moving direction of the bolt at the time of box fastening, it is not necessary to hold the bolt socket with the bolt socket. Therefore, a simple structure can be used as the bolt socket.

[Brief description of the drawings]

1 to 6 are views showing a first embodiment of the present invention. FIGS. 1 to 4 are explanatory diagrams for explaining a segment connecting method of a set bolt system, and FIG. 5 is a bolt socket. 6 is a sectional view taken along line AA of FIG. 7 to 15 are views showing a second embodiment of the present invention. FIGS. 7 to 9 are explanatory views for explaining a segment connecting method of a set bolt system, and FIG. 10 is a guide hole. Fig. 11 is a front view of a bolt socket,
FIG. 12 is a sectional view taken along the line BB of FIG. 11, FIG. 13 is an explanatory view of fastening two bolts, FIG. 14 is a front view of a bolt socket, and FIG. FIG. 4 is a cross-sectional view taken along line C. 5… Segment, 11… Connection plate, 16… Bolt box, 17… Fitting fitting, 18… Bolt hole, 19… Bolt, 20… Mating hole (screw hole), 21 …… Nut, 22 ... washer, 23 ... sealing material, 24 ... positioning rod, 24a ... male thread part, 25 ... bolt socket of the present invention, 25a, 25b ... bolt socket, 26 ... bolt socket body, 27 ... Bolt insertion part, 28… Movable wrench, 29… Gear mechanism, 30, 31… Cut, 32 …… Nut, 33 …… Nut runner, 34 …… Elastic material, 35 …… Guide hole, 36 …… Guide rod , 36a ... Male thread.

Claims (3)

(57) [Claims] When connecting segments by connecting bolts and nuts to joint plates of joint fittings embedded in both joint end surfaces of segments to be joined together to form a bolt box, the segments are connected. Before inserting, temporarily insert a bolt with a fitting hole in the center of the head into the bolt hole of the joining plate from the inside of the bolt box of one segment, and then place it on the surface of the bolt box opposite to the joining plate. The positioning rod is mounted on the bolt box, and the tip of the positioning rod is fitted into the fitting hole of the bolt head so that the bolt is set in the bolt box. A nut runner holding the nut in the bolt box of the other segment with the joining plate of the other segment in close contact with the plate And at the same time, insert a bolt socket behind the bolt head in the bolt box of the one segment, then move the bolt socket toward the bolt head to grip the bolt head, and then move in the direction. A set-bolt type segment wherein the nut is fastened by rotating the nut with the nut runner while pushing the tip of the bolt into the bolt hole of the other segment by further moving the bolt socket. Connection method. 2. A bolt head which is inserted into a bolt box of one segment when fastening with a bolt and a nut which is embedded in each joint end surface of a segment to be joined to each other and forms a bolt box. A bolt insertion portion is formed on the front surface of the bolt socket body, and a movable wrench is rotatably mounted behind the bolt insertion portion, and a gear for rotating the movable wrench. Mechanism is provided,
And a notch for allowing a positioning rod to pass through the bolt insertion portion of the bolt socket body and the movable wrench. 3. The segments are connected by connecting bolts and nuts to joint plates of joint fittings embedded in both joint end surfaces of the segments to be joined to each other to form a bolt box. Before doing so, a guide hole incorporating a pipe made of elastic material is provided on the surface opposite to the joining plate in the bolt box of one segment, and then from the inside of the bolt box to the bolt hole of the joining plate, A bolt having a fitting hole in the center of the head is inserted and temporarily placed, and then a guide rod is inserted into the guide hole, and the head of the bolt is fixed to the tip of the guide rod, thereby inserting the bolt into a bolt box. When joining each segment, the joining plate of the other segment is closely attached to the joining plate of the other segment. Insert the nut runner holding the nut into the bolt box of the other segment, insert the bolt socket into the bolt box of the one segment, fit the bolt head into the bolt socket, and then insert the bolt By moving the socket in the axial direction of the bolt, the guide rod fixing the bolt is pulled out of the guide hole, and the tip of the bolt is pushed into the bolt hole of the other segment, and the nut is rotated by the nut runner. A nut is fastened to the bolt by causing the nut to be fastened.