JP2001082082A - Fastening device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fastening device capable of fastening tunnel construction segments simply and quickly in a closed space or a small area. SOLUTION: A guide shaft 42 is protruded at the tip of the screw rod 33 of a first member 30, and a rod section 35 is fixed in a recess 34 formed on a second member 31. A head section 36 larger in diameter than the rod section 35 is formed at the tip of the rod section 35, and a cylinder section 38 having a hollow section 37 to be inserted with the head section 36 is fitted to the rod section 35 movably in the axial direction. A nut member 39 to be screwed with the screw rod 33 is fixed on the tip opening 38A side of the cylinder section 38, and a compression spring 40 is provided between the nut member 39 and head section 36. A guide tube 44 is formed on a seat section 43 sliding in the hollow section 37 of the cylinder section 38, and a work hole 41 for rotating the cylinder section 38 is provided in the recess 34 of the second member 31. The cylinder section 38 is rotated from the work hole 41 after the guide shaft 42 is inserted, and the nut member 39 is screwed to the screw rod 33.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a first member and a second member.
The present invention relates to a fastening device for fastening a member in a closed place or a narrow place.

[0002]

2. Description of the Related Art A conventional fastening device of this type is known which is used for fastening a tunnel construction segment in a tunnel excavation direction. For example, when excavating a tunnel by the shield method, a concrete segment is assembled immediately after excavation to construct an inner wall of the tunnel. At the time of this assembling, as shown in FIG. 1A and the already assembled segment 1B need to be fixed with predetermined tension at locations P, P,. Conventionally, for fastening the above segments 1A, 1B, as shown in FIG. 62, opposing bolt boxes 2, 2 are provided on opposing surfaces of the segments 1A, 1B, and bolts 3 inserted into the bolt boxes 2, 2 are provided. By tightening with the nut 4, the segments 1A and 1B are tightened together.

[0003] However, in the conventional method using the bolts 3 and the nuts 4, each time the segments 1A, 1B are assembled, the nuts 4 at a number of locations P, P ... (usually 4 to 6 locations for one segment) are set. Since the work must be tightened to a certain torque using a wrench or the like, the work becomes complicated, not only the work efficiency is extremely low, but also the bolt 3 may be loosened when assembling the next segment, and the tightening is performed. This often occurs and further reduces the work efficiency.

[0004] It is possible to solve the above-mentioned drawbacks and to prevent the bolt from being removed and to connect it with a necessary tensile force only by press-fitting the shaft, thereby completely eliminating the bolting work and the retightening work after the assembly. Japanese Patent Application Laid-Open No. 9-28
No. 0231 was developed. As shown in FIG. 63, a shaft 5 fixed to a member 1A such as one segment and protruding from its joint surface 1Aa and a shaft tension embedded in the member 1B such as the other segment and receiving the shaft 5 are provided. And a fixing portion 6. The shaft tension fixing portion 6 is provided in a housing 12 embedded in the member and is expanded by the housing 1.
2 and a temporary fixing member 14
A shaft fixing member 15 which is loosely fitted in the shaft 4 and is fixed to the shaft 5 so as to be axially immovable by the insertion of the shaft 5, and the temporary fixing member 14 is expanded to
The housing 2 includes a stopper member 16 that maintains a fixed state, and a coil spring 13 that is located inside the housing 12 and presses the temporary fixing member 14 to the rear side. When the shaft 5 is press-fitted, the stopper member 16 is pushed out at the tip thereof, and the shaft 5 is pulled in with a predetermined tensile force via the shaft fixing member 15 by the reaction of the temporary fixing member 14 by the coil spring 13 to establish a connected state. It is intended to be obtained.

In this conventional example, when the shaft 5 of the segment 1A connected thereto is inserted from the hole 10 in the bottom 11 of the housing 12 of the shaft tension fixing portion 6 embedded in the segment 1B from the state of FIG. When the tip side of the shaft passes through the shaft fixing member 15, the fixing member 15 expands and passes through the shaft fixing member 15, and when the concave and convex grooves 9 of the shaft 5 reach the concave and convex grooves 26 of the shaft fixing member 15, the provisional Since the stopper member 14 is divided in the axial direction by the slit 19 (see FIGS. 65 and 66), the diameter of the stopper member 14 is reduced, and the concave and convex grooves 9 and 26 are engaged with each other. 65 and 66, reference numeral 22 indicates a convex portion, reference numeral 23 indicates a void, and reference numeral 24 indicates a tapered inner peripheral surface. At the same time, segments 1A, 1
When the distance between the joining surfaces 1Aa and 1Bb of B approaches about 3 to 5 mm, the tip of the shaft 5 hits the stopper member 16 of the temporary fixing member 14 and pushes it out. Then coil spring 1
The pressing member 3 pushes the temporary fixing member 14 to the rear side and enters the same, and the projections 22 of the divided pieces 20, 20,.
20 are disengaged from the concave groove 21 on the inner periphery of the housing 12 due to the bending of the housing 12, and further proceed, the shaft fixing member 15 is subjected to a wedge action pressed by the tapered inner peripheral surface 24 of the space 23 of the temporary fixing member 14, The concave and convex grooves 26 of the shaft fixing member 15 are firmly engaged with the concave and convex grooves 9 of the shaft 5, and are integrated with the shaft 5. Thereby, the pressing force of the coil spring 13 is transmitted to the shaft 5 through the temporary fixing member 14 and the shaft fixing member 15, and the shaft 5 is pulled in strongly, and the joining surfaces 1Aa, 1B of the segments 1A, 1B are joined.
Even if the coil spring 1 is in contact with the coil spring 1 as shown in FIG.
The tensile force by 3 acts on the shaft 5 to obtain a strong connection state in which tension is applied.

[0006]

SUMMARY OF THE INVENTION Japanese Patent Application Laid-Open No. 9-28023
In the conventional example described in Japanese Patent Application Publication No. 1 (1993) -123, it can be used only for fastening in the tunnel excavation direction, but cannot be used for fastening adjacent segments in the circumferential direction of the peripheral wall surface. Because, when the shaft 5 protrudes from the joint surface 1Aa,
This is because the joining surfaces 1Aa and 1Bb could not be joined while rubbing each other. In the conventional example,
Instead of rotating and screwing the nut like a bolt and nut, a shaft fixing member 15 corresponding to the nut is used.
Is divided by providing a slit in the axial direction, the diameter is forcibly reduced, and the concave / convex grooves 26 on the inner peripheral surface thereof are engaged with the concave / convex grooves 9 of the shaft 5. Inferior to bolts and nuts. Further, in this conventional example, the mechanism becomes complicated, and each part also requires many special processings, which increases the cost.

Therefore, the present invention enables not only fastening in the tunnel excavation direction but also fastening in a direction orthogonal to this direction, has a sufficient fastening force, and is advantageous in terms of cost and work. The purpose is to provide.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a fastening device for fastening a first member and a second member in a closed space or a narrow space. A threaded rod is fixed in a recess formed at the end of the screw rod, and a guide shaft having a diameter smaller than the diameter of the root of the screw is formed at the tip of the threaded rod, and is joined to the end of the first member. A rod portion is fixed in a recess formed at an end portion of the two members, a head portion having a diameter larger than the diameter of the rod portion is formed at the tip of the rod portion, and a cylinder portion having a hollow portion into which the head portion is fitted is a rod portion. A nut member into which the threaded rod is screwed is fixed to the tip opening side of the cylinder portion, and a compression spring is provided between the nut member and the head portion, and a compression spring is provided between the nut member and the head portion. Abuts the inner end to receive the distal end of the compression spring A guide tube inserted into the nut member and allowing the guide shaft to be inserted is formed in a seat portion sliding in the hollow portion of the cylinder portion, and the second member is used for rotating the cylinder portion in the recess thereof. A hole is provided, and the guide member is advanced by abutting the recesses of the first and second members to insert the guide shaft, and then the cylinder is rotated from the working hole to screw the nut member into the threaded rod. It was done. A fastening device for fastening the first member and the second member in a closed place or a narrow place, wherein a screw rod is fixed to an end of the first member, and a screw root is provided at a tip of the screw rod. A guide shaft having a diameter smaller than the diameter of the portion is formed so as to protrude, and a housing having an insertion hole into which a threaded rod is inserted at an end of a second member joined to an end of the first member is provided. A nut member is set so that the center axis comes on the center of the insertion hole, a cylindrical body portion that allows insertion of the guide shaft is mounted on the upper end of the nut member, and a plurality of blades are mounted on the outer periphery of the cylindrical body portion, An air supply hole and an exhaust hole communicating with the outside of the second member are formed in the housing, the guide shaft of the screw rod is inserted from the nut member into the cylindrical body, and the second screw rod is inserted into the insertion hole of the housing. The member is joined to the first member and gas is sent from the air supply hole into the housing. Crowded those constructed as screwed into the threaded rod rotates the nut member by use of the blade is.

[0009]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

In the embodiment shown in FIGS. 1 to 6, a threaded bar 33 is fixed in a recess 32 formed in the end 30A of the first member 30. A guide shaft 42 having a diameter smaller than the diameter of the first member 30 is formed.
A rod portion 35 is fixed in a recess 34 formed in an end portion 31A of the second member 31 joined to the end portion 30A. Further, a head portion 36 larger than the diameter of the rod portion 35 is formed at the tip of the rod portion 35, and the head portion 36 is fitted into the hollow portion 37 of the cylinder portion 38. The head portion 36 fitted in the hollow portion 37 slides relatively inside the hollow portion 37 like a piston rod. The cylinder part 38 is the rod part 3
5 and slide in the recess 34. A nut member 39 into which the screw rod 33 is screwed is fixed to the distal end opening 38A side of the cylinder portion 38. A compression spring 40 is provided between the nut member 39 and the head portion 36. The cylinder portion 3 is brought into contact with the inner end of the nut member 39 to receive the distal end of the compression spring 40.
The nut member 39 is attached to the seat 43 that slides in the hollow portion 37 of FIG.
A guide cylinder 44 is formed which is inserted into the inside and allows the guide shaft 42 to be inserted. Further, the second member 31 is provided with a working hole 41 into which a device for rotating the cylinder portion 38 in the recess 34 is inserted.

In the embodiment shown in FIGS. 1 to 6, the first member 30 and the second member 31 are configured as tunnel construction segments. When fastening in the tunnel excavation direction,
As shown in FIG. 1, the tip side of the cylinder portion 38 is an end portion 31A.
The nut member 39 may be fitted to the threaded rod 33 while projecting from the screw rod 33. However, when fastening is to be performed in a direction orthogonal to the tunnel excavation direction, the ends 30A and 31A are connected to each other as shown in FIG. Two recesses 32 while sliding together,
34 must be matched. That is, as shown in FIG. 2, the second member 31 is compressed in a state where the cylinder portion 38 compresses the compression spring 40 and the cylinder portion 38 is housed in the recess 34.
Is raised on the drawing. FIG. 3 shows a state during the ascent.

FIG. 4 shows a state in which the recesses 32 and 34 are butted against each other. In the state shown in FIG. 4, the guide shaft 42 formed at the tip of the screw rod 33 is fitted into the guide cylinder 44. As a result, the axes of the screw bar 33 and the nut member 39 coincide with each other. In this state, a rotation applying means 45 for rotating the cylinder portion 38 is provided in the working hole 41. In this example, a gear is formed on the outer periphery of the cylinder portion 38, a plurality of gears 45A meshing with this gear are provided, and the gear portion 45A is rotated by an impact wrench or the like to rotate the cylinder portion 38.

The rotation applying means 45 is operated to rotate the cylinder portion 38 via the gear of the cylinder portion 38 by the rotation of the gear group 45A, and the nut member 39 is screwed into the threaded rod 33. The state is shown in FIG. After the nut member 39 is securely screwed into the threaded rod 33, the rotation applying means 45 is removed from the working hole 41 as shown in FIG.

FIG. 7 is a cross-sectional view taken along the line AA of FIG. Such rotation applying means 45
Rotate the cylinder part 38 with the nut member 39
When the rotation applying means 45 is removed after being screwed into 3, the working hole 41 is kept open as shown in FIG.
The filling member 46 is buried in the work hole 41. A groove 46A that meshes with a gear formed on the cylinder portion 38 is formed on the distal end surface of the filling member 46, and the groove 46A
The nut member 39 is prevented from loosening by meshing the gear with the gear on the outer periphery of the cylinder portion 38. The body 46B in which the groove 46A is formed is formed of metal, plastic, or the like. Further, rubber was used for the head 46C on the outer surface side. FIG. 9 shows a state where the filling member 46 is filled in the working hole 41.

The rotation applying means 45 shown in FIG. 10 is an example using a belt 45B. This belt 45B
Applies tension by the tension roller 45C, and drives the drive roller 45D to rotate the cylinder section 38. After the nut member 39 is screwed into the screw rod 33 by using the rotation applying means 45, the belt 45B is removed, and then a filling member having a shape matching the work hole 41 is filled.

The rotation applying means 45 shown in FIGS. 11 and 12
Uses a belt 45B, but forms two working holes 41, and rotates the belt 45B with the rotation driving roller 45D to rotate the cylinder portion 38.

The rotation applying means 45 shown in FIGS.
Is a belt-like belt 45B without using an endless belt.
Here is an example using. As shown in FIG. 14, the belt 45B is wound up by the rotary drive roller 45D, and a predetermined tension is applied to the belt 45B by the roller 45E in a direction opposite to the traveling direction of the belt 45B. Thereby, the cylinder part 38 is rotated.

FIG. 15 shows the working hole 41 after the cylinder 38 has been rotated in the embodiment shown in FIGS.
Shows a state where the filling member 46 is embedded. This filling member 4
6 may be a rubber cap.

In any of the embodiments described above, the first member 30
And the second member 31 are concrete segments, the recesses 32 and 34 are formed by being surrounded by an iron plate, and the screw rod 33 and the rod portion 35 are coupled to anchoring bars for concrete reinforcement. A washer 36A is provided on the base side of the head portion 36.

In the embodiment shown in FIGS.
A housing 48 having an insertion hole 47 into which the screw rod 33 is inserted is provided in a recess 34 formed in the end 31A of the second member 31 joined to the end 30A of the member 30. A nut member 49 is set in the housing 48 so that the center axis is located on the center of the insertion hole 47. A cylindrical body 50 that allows the guide shaft 42 to be inserted into the upper end of the nut member 49.
Is installed. Further, a plurality of blades 51 are attached to the outer periphery of the cylindrical body 50. The second member 3 is attached to the housing 48.
A ventilation hole 52 and an exhaust port 53 communicating with the outside of the device 1 are formed. The guide shaft 42 of the screw rod 33 protruding from the end 30A of the first member 30 is moved from the nut member 49 to the cylindrical body 50.
The second member 31 is inserted into the first member 30 while the screw rod 33 is inserted into the insertion hole 47 of the housing 48.
To be joined. That is, the state shown in FIG. 17 is changed to the state shown in FIG. At this time, the tip of the guide shaft 42 is
Four hits. The elastic member 54 is formed of an elastic body such as rubber. In the state shown in FIG. 18, the gas is sent from the air supply hole 52 into the housing 48, and the nut member 49 is rotated using the blade 51 and screwed into the screw rod 33.
This state is shown in FIG. In the state shown in FIG.
The elastic member 54 is pressed against the cylindrical body 50,
The elastic member 54 may be configured to exert a force for pushing the cylindrical body portion 50 downward by the elastic force. Elastic member 5
Due to the elastic force of 4, the nut member 49 is brought into a state immediately before engaging with the first thread of the threaded rod 33.

FIG. 20 is a sectional view taken along the line AA of FIG. 16, in which a ratchet gear 55 is formed on the outer peripheral surface on the lower end side of the nut member 49, and the distal end meshes with the ratchet gear 55 on the inner peripheral surface on the lower end side of the housing 48. A plurality of leaf spring-shaped stoppers 56 are attached, and the center axis of the nut member 49 is aligned with the center of the insertion hole 47 with the ends of the stoppers 56 meshing with the ratchet gear 55, and the nut member 49 is fastened to the screw rod 33. The rotation in the exit direction is prevented without hindering the rotation in the arrival direction.

FIG. 21 shows a cross section taken along line BB in FIG. In this cross section, the lower side of the blade 51 bends toward the nut member 49, and plays a role of pushing down the nut member 49 at this portion when gas such as air is supplied. The portion of the blade 51 is indicated by reference numeral 51A. FIG. 22 shows a cross section taken along the line CC in FIG. 16, showing the air supply holes 52 and the exhaust holes 53, and also shows the sirocco type propeller type blades 51.

FIG. 23 shows a cross section taken along line DD in FIG. 16, and shows a state in which a clutch mechanism (conversion means) 57 is provided at a portion where the nut member 49 and the cylindrical body 50 are attached. By providing the clutch mechanism 57, when the cylindrical body 50 is rotated by the rotation of the blade 51, the rotational force of the cylindrical body 50 is converted and transmitted to the nut member 49 as a large tightening torque. .

The embodiment shown in FIGS. 24 to 33 shows a modification of the mounting structure between the cylindrical portion 50 and the nut member 49. FIG. That is, in the above-described embodiment, the speed reduction device using the clutch disk type mechanism, that is, the conversion means 57 is used, but in the following embodiment, an example in which the hitting type conversion means 57 is used is shown. 31 to 33 in this embodiment are cross sections taken along line DD in FIG. The structure of the conversion means 57 is the same as that of the previous embodiment except that the structure of the conversion means 57 is changed to a hitting type.

The embodiment shown in FIGS. 34 to 40 shows an example in which the cylindrical body 50 and the nut member 49 are attached by screw fitting. Therefore, the rotational force of the blade 51 is transmitted to the nut member 49 as it is. That is, in the above embodiment, the reduction gear is used, but in this embodiment, the rotational force of the blade 51 is directly transmitted without deceleration.

In still another embodiment shown in FIGS. 41 to 45, the configuration on the second member 31 side is the same as that shown in FIG. 16, but shows an example in which the configuration on the first member 30 is changed. It is. Therefore, the configuration on the second member 31 side is shown in FIG.
The same reference numerals are given to the same members as 6 and the description is omitted. In this embodiment, a spring housing 58 is provided on the first member 30 side, and a spring 59 is housed in the spring housing 58. The upper end of the spring 59 is attached to the base end 33A of the screw rod 33. The screw rod 33 pushes the spring 59 back into the spring housing 58 and is housed therein. Accordingly, when the first member 30 and the second member 31 are fastened while being joined together in a direction perpendicular to the tunnel excavation direction, the screw rod 33 is moved against the spring force of the spring 59 as shown in FIG. 58. With the guide shaft 42 reaching the insertion hole 27 of the housing 48, the guide shaft 42 and the screw rod 33 enter the housing 48 by the force of the spring 59.

In the embodiment shown in FIGS. 46 to 53, the first
The member 30 and the second member 31 are steel plates, and the first member 30 has a screw rod 33 fixed thereto, and the second member 31 has a housing 4 having an insertion hole 47 into which the screw rod 33 is inserted.
8 is provided. The internal structure of the housing 48 is the same as that of the embodiment shown in FIG. In a state where the respective end portions (in this case, respective surfaces) 30A and 31A of the first member 30 and the second member 31 are joined to each other, the upper end of the cylindrical body portion 50 contacts the elastic member 54 (see FIG. 48). In this state, a gas such as air is sent from the air supply hole 52 into the housing 48. When gas is sent into the housing 48, the blades 51 rotate the cylindrical body 50, and the rotational force of the cylindrical body 50 is transmitted as a large tightening torque to the nut member 49 via the clutch mechanism (conversion means) 57. And the nut member 49 is
Screwed in. FIG. 50 shows a cross section taken along line AA of FIG. 46, which is the same mechanism as shown in FIG. FIG. 51 is a cross-sectional view of FIG.
3 shows a cross section taken along line B. FIG. 52 shows a cross section taken along line CC of FIG. 46, and clearly shows the positional relationship between the air supply hole 52 and the exhaust hole 53. FIG. 53 shows a cross section taken along line DD of FIG. 46, and shows a clutch mechanism 57 as a reduction gear. In this embodiment, the elastic member 54 is formed of rubber in a cylindrical shape, and a metal ring 54A is attached to a lower surface thereof. This ring 54A
Is for improving the separation of the cylindrical body portion 50 from the elastic member 54 side when the nut member 49 is screwed into the screw rod 33 at the beginning. In the state shown in FIG. 48, the upper end of the cylindrical body 50 contacts the ring 54A, and compresses the rubber elastic member 54. Therefore, the elastic force of the elastic member 54 is
It acts on the nut member 49 from 0, and the screw at the tip of the nut member 49 and the screw at the tip of the threaded bar 33 are in a state immediately before meshing. The cylindrical body 50 and the blade 51 are integrally formed of a plastic material or the like, and the blade 51 does not have the above-described portion 51A. Blade 51 without portion 51A
However, since the nut member 49 is pushed down by the elastic member 54, the nut member 49 is smoothly screwed into the screw rod 33 if a rotational force is applied. Further, in this embodiment, two exhaust holes 53 are formed.

In the embodiment shown in FIGS. 54 to 58, a housing 48 similar to that of the previously described embodiment is connected to the second member 31.
The first member 30 is provided with a spring housing 58, and a spring 59 is housed in the spring housing 58. The upper end of the spring 59 is attached to the base end 33A of the screw rod 33. The screw rod 33 pushes the spring 59 back into the spring housing 58 and is housed therein.

FIG. 59 shows, with arrows, the movement of the tunnel construction segment in the tunnel excavation direction.
The embodiment of the type in which the end portions 30A and 31A are rubbed and joined together corresponds to all the movements of the segments shown in FIG. 59, so that the segments can be fastened.
The segment shown in FIG. 60 shows a case where the segments are fastened to each other in the tunnel digging direction.

[0030]

As described above, according to the present invention, the threaded rod is fixed in the recess formed at the end of the first member, and the tip of the threaded rod is smaller than the diameter of the root of the screw. A guide shaft having a diameter is formed so as to protrude, and a rod portion is fixed in a recess formed at an end of a second member joined to an end of the first member, and a head portion having a diameter larger than the diameter of the rod portion is fixed to the rod portion. A cylinder portion formed at the tip and having a hollow portion into which the head portion is fitted is attached to the rod portion so as to be movable in the axial direction,
A nut member into which the threaded rod is screwed is fixed to the distal end opening side of the cylinder portion, a compression spring is provided between the nut member and the head portion, and the distal end side of the compression spring contacts the inner end of the nut member. A guide cylinder which is inserted into the nut member and allows the insertion of the guide shaft is formed in the seat portion which receives and slides in the hollow portion of the cylinder portion, and the second member is used for rotating the cylinder portion in the recess thereof. A hole is provided, and the guide member is advanced by abutting the recesses of the first and second members to insert the guide shaft, and then the cylinder is rotated from the working hole to screw the nut member into the threaded rod. Because
For example, when the first member and the second member are segments for tunnel construction, not only fastening in the tunnel excavation direction but also fastening of the segments in a direction orthogonal to this direction can be performed easily and quickly. Also, the fastening is secure because of the bolt and nut system. Further, the guide shaft is inserted into the guide cylinder, and the nut member is accurately fitted to the screw rod.

Further, a screw rod is fixed to the end of the first member,
A guide shaft having a diameter smaller than the diameter of the root of the screw is formed at the tip of the threaded rod, and an insertion hole into which the threaded rod is inserted at the end of the second member joined to the end of the first member. A nut member is set in the housing so that the center axis is located on the center of the insertion hole, and a cylindrical body portion that allows insertion of the guide shaft is attached to the upper end of the nut member. A plurality of blades are mounted on the outer periphery of the housing, an air supply hole and an exhaust hole communicating with the outside of the second member are formed in the housing, the guide shaft of the screw rod is inserted from the nut member into the cylindrical body, and the screw rod is connected to the housing. The second member is joined to the first member in a state of being inserted into the insertion hole, and gas is sent from the air supply hole into the housing, and the nut member is rotated using the blade to be screwed into the threaded rod. Closing the first member and the second member Since it is not necessary to use a jig to rotate the nut member and just feed gas such as air, it is possible to quickly and reliably fasten even in hard-to-reach places. Become. Further, in the case where the threaded rod is pushed into the inside of the first member and is urged in a projecting direction by a spring,
In the case where the first and second members are segments for constructing a tunnel, the segments can be fastened not only in the tunnel excavation direction but also in a direction orthogonal to the direction.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a preferred embodiment of the present invention before fastening.

FIG. 2 is a cross-sectional view of a state where ends of first and second members are rubbed together;

FIG. 3 is a cross-sectional view just before the recesses are to be butted against each other.

FIG. 4 is a cross-sectional view showing a state in which recesses are abutted with each other and a guide shaft is fitted into a guide cylinder.

FIG. 5 is a cross-sectional view after rotating a cylinder unit using a tool or the like from a work hole.

FIG. 6 is a cross-sectional view showing a state in which an instrument or the like is removed from a working hole and fastening is completed.

FIG. 7 is a cross-sectional view illustrating an example of a rotation applying unit.

FIG. 8 is a cross-sectional view of a state in which a filling member is buried in a work hole after the rotation applying unit has been removed.

FIG. 9 is a sectional view showing a state in which a filling member is embedded.

FIG. 10 is a sectional view showing another rotation applying means.

FIG. 11 is a sectional view showing still another rotation applying means.

FIG. 12 is a cross-sectional view showing a state in which the rotation applying unit shown in FIG. 11 is rotated.

FIG. 13 is a sectional view showing still another rotation applying means.

FIG. 14 is a cross-sectional view showing a state in which the rotation applying unit in FIG. 13 is rotated.

FIG. 15 is a cross-sectional view of a state in which a filling member is buried in a work hole after the rotation applying unit has been removed.

FIG. 16 is a sectional view showing another embodiment.

FIG. 17 is a sectional view showing a state where the guide shaft is inserted into the guide cylinder.

FIG. 18 is a sectional view of a state where the first member and the second member are joined.

FIG. 19 is a cross-sectional view of a state where the nut member is fitted to the threaded rod using the blade.

FIG. 20 is a sectional view taken along line AA of FIG. 16;

FIG. 21 is a sectional view taken along line BB of FIG. 16;

FIG. 22 is a sectional view taken along line CC of FIG. 16;

FIG. 23 is a sectional view taken along line DD of FIG. 16;

FIG. 24 is a sectional view showing still another embodiment.

FIG. 25 is a sectional view showing a state where the guide shaft is inserted into the guide cylinder.

FIG. 26 is a sectional view of a state in which the first and second members are joined.

FIG. 27 is a cross-sectional view showing a state where air is sent to the blade and a nut member is screwed into a screw rod.

FIG. 28 is a sectional view taken along line AA of FIG. 24;

FIG. 29 is a sectional view taken along line BB of FIG. 24;

FIG. 30 is a sectional view taken along line CC of FIG. 24;

FIG. 31 is a sectional view taken along line DD of FIG. 24;

FIG. 32 is a cross-sectional view showing a state in which a gas such as air is supplied from the state of FIG. 31 and the blade is rotated.

FIG. 33 is a sectional view showing a state next to FIG. 32;

FIG. 34 is a sectional view showing still another embodiment.

FIG. 35 is a sectional view showing a state where the guide shaft is inserted into the guide cylinder.

FIG. 36 is a sectional view of a state where the first and second members are joined.

FIG. 37 is a sectional view showing a state in which air is sent to the blade and a nut member is screwed into a threaded rod.

FIG. 38 is a sectional view taken along line AA of FIG. 34;

FIG. 39 is a sectional view taken along line BB of FIG. 34;

40 is a sectional view taken along line CC of FIG. 34.

FIG. 41 is a sectional view showing an example in which the screw rod on the first member side is configured to be able to protrude and retract from the end surface of the first member in the embodiment shown in FIG. 16;

FIG. 42 is a sectional view of a state where the ends of the first and second members are rubbed together;

FIG. 43 is a sectional view showing a state where the guide shaft is inserted into the guide cylinder.

FIG. 44 is a cross-sectional view showing a state where the threaded rod is raised by the force of a spring.

FIG. 45 is a cross-sectional view showing a state where air is blown into the blade and the nut member is screwed into the screw rod.

FIG. 46 is a sectional view showing still another embodiment.

FIG. 47 is a sectional view showing a state where the guide shaft is inserted into the guide cylinder.

FIG. 48 is a cross-sectional view of a state where the respective ends of the first and second members are joined.

FIG. 49 is a cross-sectional view of a state in which air is blown to rotate a blade and a nut member is screwed into a screw rod.

50 is a sectional view taken along line AA of FIG. 46.

FIG. 51 is a sectional view taken along line BB of FIG. 46;

FIG. 52 is a sectional view taken along line CC of FIG. 46;

FIG. 53 is a sectional view taken along line DD of FIG. 46;

54. In the embodiment shown in FIG. 46, the screw rod side is the first
Sectional drawing which shows the example comprised so that it could come and go from the end surface of a member.

FIG. 55 is a sectional view of a state where the first and second members are rubbed together;

FIG. 56 is a sectional view showing a state where the guide shaft is inserted into the guide cylinder.

FIG. 57 is a sectional view showing a state where the screw rod is raised by the force of a spring;

FIG. 58 is a sectional view showing a state in which air is blown into the blade and the nut member is screwed into the screw rod;

FIG. 59 is a schematic development view showing a joining direction of the segments for tunnel construction.

FIG. 60 is a developed plan view showing fastening of the tunnel construction segment in the tunnel excavation direction.

FIG. 61 is a developed plan view showing a conventional example.

FIG. 62 is a sectional view of a fastening portion.

FIG. 63 is a sectional view showing yet another conventional example before fastening.

FIG. 64 is a sectional view at the time of fastening in FIG. 63;

FIG. 65 is a side view of a temporary fixing member used in the conventional example of FIG. 63;

FIG. 66 is a front view of a temporary fixing member.

[Explanation of symbols]

 Reference Signs List 30 first member 30A end 31 second member 31A end 33 screw rod 32, 34 recess 35 rod part 36 head part 37 hollow part 38 cylinder part 38A tip opening 39 nut member 40 compression spring 41 working hole 42 guide shaft 43 Seat 44 Guide tube

Claims (6)

[Claims] 1. A fastening device for fastening a first member and a second member in a closed space or a narrow space, wherein a screw rod is fixed in a recess formed at an end of the first member. A guide shaft having a diameter smaller than the diameter of the root of the screw is formed at the tip of the threaded rod, and the rod is fixed in a recess formed at the end of the second member joined to the end of the first member. A head portion larger than the diameter of the rod portion is formed at the tip of the rod portion; a cylinder portion having a hollow portion into which the head portion is fitted is mounted on the rod portion so as to be movable in the axial direction; A nut member into which the threaded rod is screwed is fixed to a side of the nut member, a compression spring is provided between the nut member and the head portion, and a tip end side of the compression spring is received while being in contact with an inner end of the nut member. On the seat that slides in the hollow part of the Forming a guide cylinder inserted into the first member and allowing the insertion of the guide shaft; providing a working hole for rotating the cylinder portion in the second member in the second member; A fastening device, wherein the nut is screwed into a threaded rod by rotating a cylinder part from a working hole after inserting a guide shaft by advancing a guide cylinder while abutting a place. 2. A fastening device for fastening a first member and a second member in a closed space or a narrow space, wherein a threaded rod is fixed to an end of the first member, and a tip of the threaded rod is fixed to an end of the threaded rod. A guide shaft having a diameter smaller than the diameter of the screw root is formed so as to protrude, and a housing having an insertion hole into which a screw rod is inserted at an end of a second member joined to an end of the first member is provided. A nut member is set in the housing so that the center axis is located on the center of the insertion hole, and a cylindrical portion that allows the guide shaft to be inserted is attached to the upper end of the nut member. A state in which an air supply hole and an exhaust hole communicating with the outside of the second member are formed in the housing, the guide shaft of the screw rod is inserted from the nut member into the cylindrical body, and the screw rod is inserted into the insertion hole of the housing. To join the second member to the first member and blow gas from the air supply hole. Fastening device characterized by being configured so screwed into the threaded rod rotates the nut member by use of the blade is fed into the ring. 3. The fastening device according to claim 2, wherein the screw rod is pushed into the inside of the first member and is urged in a projecting direction by a spring. 4. The method according to claim 1, wherein when the cylinder is rotated by supplying gas to the blades during air supply, the torque of the cylinder is applied to the nut member by a large tightening torque. The fastening device according to claim 2, wherein the fastening device is mounted via a conversion unit that converts and transmits the data. 5. A ratchet gear is formed on the outer peripheral surface on the lower end side of the nut member, and a plurality of leaf spring-shaped stoppers whose tips mesh with the ratchet gear are mounted on the inner peripheral surface on the lower end side of the housing. In the engaged state, the center axis of the nut member is aligned with the center of the insertion hole, and the rotation of the nut member in the direction of tightening to the threaded rod is prevented and the rotation of the nut member in the exit direction is prevented. The fastening device according to any one of claims 2 to 4, wherein 6. The fastening device according to claim 1, wherein the first and second members are segments for constructing a tunnel.