JPH09310598A - Bolt-nut clamper and erector device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To clamp an article to be clamped simply with high torque even at a place, where a work platform is not stabilized, by installing holding sections holding a bolt and a nut respectively and rotating and driving the nut holding section. SOLUTION: A bolt holder 13 having a socket 13a holding a bolt 10 at a front end is supported to a base member 11 with a handle 21. A nut runner 16 having a socket 16a holding a nut 9 at a front end is supported movably to the base member 11 through a guide rail 12 and a guide block 15. A pull spring 18 is installed between the bolt holder 13 and the guide block 15, and the nut runner 16 is energized to the bolt holder 13 side. The socket 16a is turned and driven by a rolling drive mechanism consisting of a driving motor 17 and a gear row.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bolt / nut fastener and an erector device, and more particularly to a bolt / nut fastener for fastening a nut to a bolt passed through two segments during segment assembly. The present invention relates to an erector device which is provided at a rear portion of a shield machine and assembles segments.

[0002]

2. Description of the Related Art Usually, when a tunnel is constructed by a shield machine, segments are sequentially assembled on the inner peripheral wall surface of the tunnel. Assembly of this segment is performed by an erector device provided at the rear of the shield machine.

In general, the erector device includes an erector ring supported on the rear part of the shield machine so as to be rotatable about the shield axis, and a segment gripping part movably supported on the erector ring in the shield radial direction to grip a segment. have. When a segment is assembled by such a general erector device, the segment gripping portion grips a segment to be assembled (hereinafter referred to as an assembly segment), and in that state, the segment gripping portion is swung to the segment assembly position to assemble the segment. The segment is positioned with respect to the existing segment, then the nut is fitted through the bolt holes of the assembled segment and the existing segment, and the nut is rotated and tightened by a torque wrench or the like to fasten the assembled segment and the existing segment.

Further, Japanese Utility Model Publication No. 4-84499 discloses that
The segment grip (suspension beam) has a bolt storage box that stores multiple bolts, a nut storage box that stores multiple nuts, and an erector device that has a hydraulic / pneumatic or electric fastener (wrench) detachably attached. Has been described. When performing segment assembly with such an erector device, after positioning the assembly segment at a predetermined assembly position, the bolts and nuts are taken out from the bolt storage box and the nut storage box, respectively, and the fastener is removed from the suspension beam. The assembly segment and the existing segment are fastened by.

[0005]

However, the above-mentioned prior art has the following problems. When a segment is to be fastened by a general erector device, an operator sequentially carries fasteners such as a torque wrench to an assembly position and tightens the nuts with the fasteners, but with the recent increase in diameter of shield machines. Due to an increase in size of bolts and nuts and an increase in fastening torque, workers are forced to perform fastening work with greater force. For example, assuming that the fastening torque is 100 kg-m and the length of the torque wrench is 1 m, the worker must fasten with a force of 100 kg to obtain the predetermined torque. However, the force that a normal worker can output in a place with a good working environment is about 60 kg, and in this case, the nut cannot be firmly tightened. When the torque wrench is lengthened, a predetermined torque can be obtained. However, since the work space is narrow in the shield machine, the torque wrench cannot be lengthened unnecessarily. Therefore, it is impossible to obtain a predetermined torque by using such a torque wrench.

It is also conceivable to use hydraulic / pneumatic or electric fasteners other than the torque wrench, but a fastener that can provide a large torque capacity increases in size and weight, so that the operator can easily do so. It is not portable, and even if it can be carried, it is a difficult task to carry it from the bottom to the top of the shield machine.

On the other hand, in the erector device disclosed in Japanese Utility Model Laid-Open No. 4-84499, the fastener is of the hydraulic / pneumatic type or the electric type and the fastener is detachably attached to the suspension beam. Problems are solved. However, the fastener described in Japanese Utility Model Laid-Open No. 4-84499 has
The nut is simply rotated by an electric motor or the like, and it is necessary to apply a spanner to the bolt side so that the bolt and the nut do not rotate together during the fastening work. Therefore, the worker supports both the fastener and the wrench for preventing rotation, and the fastening work is difficult, and it is difficult to fasten with a high torque particularly in an unstable place of the work scaffold.

An object of the present invention is to provide a bolt / nut fastener and an erector device capable of easily fastening a fastened object with high torque even in a place where a work scaffold is unstable.

[0009]

[Means for Solving the Problems]

(1) In order to achieve the above-mentioned object, the present invention provides a bolt-nut fastener for fastening a nut to a bolt passed through these fastening objects when bolting two fastening objects. And a first arm having a first holding portion that is supported by the base member and holds one of the head of the bolt and the nut, and moves to the base member via a slide mechanism. A second member that is movably supported and holds the head of the bolt and the other of the nuts
A second arm having a holding portion, a biasing means provided between the first arm and the second arm, for biasing the second arm toward the first arm, the first arm and the second arm And a rotation drive mechanism which is provided in any one of the above and rotationally drives the corresponding holding portion.

In the bolt / nut fastener of the present invention constructed as described above, either the head of the bolt or the nut is held by the first holding portion of the first arm, and
The second holding part of the second arm holds the other of the head of the bolt and the nut, and the rotary drive mechanism rotationally drives either the first holding part or the second holding part, so that the bolt and the nut are firmly tightened. In addition, it is not necessary to apply one of the bolts and nuts with a wrench for preventing rotation while tightening the other with a wrench.This makes it easy to apply high torque to the fastened object even when the work platform is unstable. Can be concluded at.

(2) In the above (1), preferably,
The first holding portion is a bolt holding portion that holds the head of the bolt, the second holding portion is a nut holding portion that holds the nut, and the rotation drive mechanism is provided on the second arm, The nut holder is configured to rotate.

(3) In order to achieve the above object,
The present invention relates to an erector device having an erector ring rotatably supported around a shield axis on a rear part of a shield machine, and a segment gripper movably supported by the erector ring in a shield radial direction and gripping a segment. In the above configuration, the segment gripping portion is provided with a holding means for detachably holding the bolt / nut fastener of (1).

In the erector device of the present invention constructed as described above, when the bolt / nut fastener of the above (1) is not used, it is held by the holding means, and the bolt
When the nut fastener is used, it can be removed from the holding means, so that the assembly segment and the existing segment can be fastened easily and with high torque even in a place where the scaffolding in the tunnel is unstable.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. 1 and 2, the erector device 2 of the present embodiment is installed in the rear part of the shield machine 30, and the erector device 2 has an erector ring 3. The erector ring 3 is supported by a plurality of rollers 33 attached to the shield machine 30 so as to be rotatable around the shield axis, and is rotated by a hydraulic motor 42 attached to the shield machine 30 via a pinion 43 and a gear (not shown). To do.

Two arms 45 project from the erector ring 3 in the shield axial direction, and rods 46 are slidably arranged in the shield radial direction in through holes provided in these arms 45, respectively. A suspension beam 47 having a substantially gate shape is attached to the rod 46 of the. A pressing jack 48 is attached between the suspension beam 47 and the arm 45, and the suspension jack 47 slides in the shield radial direction by the pressing jack 48.

A slider 5 is provided at the center of the suspension beam 47.
The slider 50 is slidably supported in the shield axis direction by two guide pins 51. A front-rear sliding jack 52 is mounted between the slider 50 and the suspension beam 47.
2, the slider 50 slides in the shield axis direction.
Two segment gripping members 54 are attached to the central portion of the lower surface of the slider 50 at a predetermined interval, and these segment gripping members 54 are provided with holes for pins 55 for gripping the segments 6. There is.

A female screw is cut at the center of the segment 6, and a holding metal fitting 49 is screwed into this female screw. The non-screw side of the grip 49 has an eye end shape,
A hole is provided for the pin 55 described above. Segment 6
When gripping, the gripping metal 49 is inserted between the two segment gripping members 54, and the pin 55 is passed through the holes of the segment gripping member 54 and the gripping metal 49 to suspend the segment 6 on the slider 50. . At both ends on the lower surface of the slider 50, steady rests 56 are attached to prevent the held segments 6 from wobbling.

A storage box 40 is provided at the side of the suspension beam 47, which is a constitution of a holding means for detachably holding the bolt / nut fastener 1 used when bolting the segments 6 to each other. Has been.

The bolt / nut fastener 1 is shown in FIGS.
As shown in FIG.
Arm-shaped bolt holder 13 provided with a socket 13a, which is fixed to the end portion of the socket, and is a bolt holding portion for holding the head 10a of the bolt 10 at the tip end, a guide rail 12 provided on the base member 11, and this guide. An arm provided with a slide mechanism 14 including a guide block 15 slidably supported on a rail 12, and a socket 16a that is connected to the guide block 15 and is a rotatable nut holding portion that holds a nut 9 at a tip end portion. And a nut runner 16 in the shape of a circle.

The bolt holder 13 is attached so as to be orthogonal to the base member 11 and to the axis X1 of the socket 13a, and the nut runner 16 is orthogonal to the base member 11 and the axis of the socket 16a. It is attached so as to be orthogonal to X2 (coincident with the axis X1 of the bolt 10).

Bolt holder 13 and guide block 15
A pulling spring 18, which is a biasing means, is attached to this, and the spring force of this pulling spring 18 biases the nut runner 16 along the guide rail 12 toward the bolt holder 13 side. The nut runner 16 is provided with a rotary drive mechanism 28 including a drive motor 17 and a gear train 19, and the drive motor 17 drives the socket 16 a to rotate via the gear train 19.

Further, the base member 11 is provided with a handle 21 for the operator to grip and a switch 22 for the operator to instruct the rotation of the drive motor 17. A power supply hose 23 (or cable) is connected to the switch 22, and the connector 2 is attached to the end of the hose 23.
4 is attached.

As shown in FIGS. 5 and 6, one surface of the storage box 40 described above is open, and a pin 41 for preventing the bolt / nut fastener 1 from coming out is inserted near the opening 40a. A hole for inserting it in the hanging beam 47. When the bolt / nut fastener 1 is not used, the bolt / nut fastener 1 is inserted from the opening 40a of the storage box 40, and the pin 41 is inserted into the hanging beam 47 through the hole near the opening 40a. The bolt / nut fastener 1 is surrounded by the storage box 40 and the pin 41 and does not come out from the opening 40a.

Further, a joint box 47b connected to a power source (not shown) via a hose or a cable is provided on the side of the suspension beam 47, and the connector 24 at the tip of the hose 23 is connected to the joint box 47b. Are connected. As a result, the bolt / nut fastener 1 can be driven.

Next, the process of fastening the segments 6 to each other by the bolt / nut fastener 1 will be described. In this case, the segment 6 held by the slider 50 and to be assembled from now on is the assembly segment 6A, and the segment 6 already assembled is the existing segment 6B.

First, the operator S presses the hydraulic motor 42 and the pressing jack 4 with a manual operation switch (not shown).
8. The front-rear sliding jack 52 is driven to move the slider 50 holding the assembly segment 6A to the segment assembly position, and the assembly segment 6A is moved to the existing segment 6
Position so that B and the bolt hole 6b are aligned. And
The bolt 10 is passed through the bolt holes 6b of the assembly segment 6A and the existing segment 6B, and the nut 9 is fitted into the bolt 10.

Next, the worker S inserts the pin 41 into the storage box 40.
And remove the bolt / nut fastener 1 from the storage box 40. Then, as shown in FIG. 7, holding the handle 21, the socket 13a of the bolt holder 13 and the socket 16a of the nut runner 16 are respectively assembled into segments 6A.
And the bolt box 6a of the existing segment 6B. Then, install the nut runner 16 in the bolt holder 13
The head 10a of the bolt 10 is held in the socket 13a, and the nut 9 is held in the socket 16a. At this time, the head 1 of the bolt 10
If the phase of 0a and the socket 13a or the phase of the nut 9 and the socket 16a do not match, the bolt / nut fastener 1 may be appropriately tilted so that the phases match.

Next, the operator S turns on the switch 22 to drive the drive motor 17 to drive the socket 16
The nut 9 is screwed into the bolt 10 by rotating a, and the assembly segment 6A and the existing segment 6B are fastened.

In the above bolt / nut fastening operation, the worker S is supposed to pass the bolt 10 through the bolt holes 6b of the assembly segment 6A and the existing segment 6B and fit the nut 9 before fastening. First, the bolt 9 and the nut 10 are held in the socket 13a and the socket 16a, respectively, and in that state, the nut runner 16 is pulled in a direction away from the bolt holder 13 to remove the bolt hole 6b of the assembly segment 6A and the existing segment 6B.
Alternatively, the bolt 10 may be passed through, and then the driving motor 17 may be driven to rotate the socket 16a to screw the nut 9 into the bolt 10.

The bolt-nut fastening with the bolt-nut fastening tool 1 as described above will be compared with the conventional bolt-nut fastening tool. 8 and 9 show a first comparative example. This comparative example uses a torque wrench 5 as a bolt / nut fastener. In this comparative example, the worker S manually tightens the nut with the torque wrench 5, so that not only a considerable burden is placed on the worker S, but also when the size of the bolt and the nut and the tightening torque are large, the above-mentioned is performed. It is not possible to obtain a reliable fastening force for some reason.

FIG. 10 shows a second comparative example. This comparative example uses the electric wrench 100 described in Japanese Utility Model Publication No. 4-84499 as a bolt / nut fastener.
In this comparative example, the worker S tightens the nuts with the electric wrench 100 instead of manually, so the burden on the worker S is lightened accordingly, but the electric wrench 100 is used.
Simply rotates the nut with an electric motor or the like, and it is necessary to apply a spanner 200 to the bolt side so that the bolt and the nut do not rotate together as shown in FIG. Therefore, the worker S supports both the electric wrench 100 and the wrench 200 for preventing rotation, and the fastening work is difficult, and it is difficult to fasten with a high torque especially in an unstable place of the work scaffold. become.

Further, in this comparative example, as shown in FIG. 10, the electric wrench 100 is put in the bolt box 60a provided in the segment 60, and the electric wrench 10 is inserted.
The width M of the bolt box 60a must be greater than or equal to the length L of the electric wrench 100 in order to align the axis of the socket 100a provided at the end of 0 with the axis X * of the bolt hole 60b. Therefore, such an electric wrench 10
Although 0 can be used for fastening a core type segment having a large bolt box, it cannot be used for fastening a flat plate type segment in which the bolt box is as small as possible from the viewpoint of strength, and lacks versatility.

On the other hand, in this embodiment, the nut runner 16 is pulled in the direction away from the bolt holder 13 to hold the head 10a of the bolt 10 in the socket 13a of the bolt holder 13 and the nut 9 to the socket of the nut runner 16. 16a, and then the drive motor 17 is driven to rotate the nut 9 to fasten the segment 6, so that the bolt 10 and the nut 9 are firmly tightened and the bolt 9 is prevented from rotating. Applying a spanner for the nut 1
It is not necessary to fasten 0, and the segment 6 can be fastened easily and with high torque even in a place where the work scaffold is unstable. As a result, the work load on the worker S can be reduced, a reliable fastening force can be obtained, and the fastening quality of the segment 6 is improved.

Further, since the length L1 of the bolt holder 13 in the direction of the axis X1 and the length L2 of the nut runner 16 in the direction of the axis X2 are small, it can be used not only for fastening the core type segment but also for the flat type segment. be able to.

Further, the suspension beam 47 is provided with a storage box 40 for detachably holding the bolt / nut fastener 1 and is stored in the storage box 40 when the bolt / nut fastener 1 is not used. When fastening each other, the worker S does not need to carry the bolt / nut fastener 1 and the work load on the worker S can be significantly reduced.

In the bolt / nut fastener 1 of this embodiment, the bolt holder 13 is fixedly supported by the base member 11, and the nut runner 16 is movably supported by the base member 11 via the slide mechanism 14. Although the configuration is not limited to this, the nut runner 16 may be fixedly supported by the base member 11 and the bolt holder 13 may be movably supported by the base member 11 via the slide mechanism 14.

Although the socket 16a provided at the tip of the nut runner 16 is rotatable, the socket 13a provided at the tip of the bolt holder 13 is not limited to this, and the socket 13a is rotatable. It is also possible to adopt a configuration in which a mechanism for rotationally driving is provided.

Further, in the erector device 2 of the present embodiment, the suspension beam 47 is provided with the storage box 40 and the bolt / nut fastener 1 is stored in the storage box 40. It suffices that the hook 47 is provided with a hook and the bolt / nut fastener 1 is hooked on the hook so that the bolt / nut fastener 1 can be detachably held.

In this embodiment described above, the bolt / nut fastener 1 for fastening the segments 6 to each other has been described. However, the present invention is not limited to this, and when two objects to be fastened are bolted, Any bolt / nut fastener for fastening the nut to the bolt passed through the fastener can be applied.

[0040]

According to the present invention, the object to be fastened can be fastened easily and with high torque even in a place where the work scaffold is unstable, so that the work load on the worker can be reduced and the fastening can be surely performed. The force is obtained and the fastening quality of the article to be fastened is improved.

[Brief description of drawings]

FIG. 1 is a view showing a shield machine equipped with an erector device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 illustrates a bolt and nut fastener according to an embodiment of the present invention.

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

FIG. 5 is an enlarged view of the storage box shown in FIG.

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

FIG. 7 is a view showing how the bolt and nut fasteners shown in FIG. 3 fasten segments together.

FIG. 8 is a diagram showing a manner in which the segments are fastened to each other by the bolt / nut fastener of the first comparative example.

9 is a sectional view taken along line IX-IX in FIG.

FIG. 10 is a view showing how segments are fastened together by a bolt / nut fastener according to a second comparative example.

[Explanation of symbols]

 1 Bolt / Nut Fastener 2 Erector Device 3 Erector Ring 6 Segment 6A Assembly Segment 6B Existing Segment 9 Nut 10 Bolt 10a Head 11 Base Member 12 Guide Rail 13 Bolt Holder (First Arm) 13a Socket (First Holding Part) 14 Slide Mechanism 15 Guide block 16 Nut runner (second arm) 16a Socket (second holding part) 17 Drive motor 18 Pulling spring (biasing means) 19 Gear train 21 Handle 22 Switch 28 Rotation drive mechanism 40 Storage box (holding means) 41 Pin (holding means) 47 Hanging beam

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takami Kusagi 650 Jinrachicho, Tsuchiura, Ibaraki Prefecture Tsuchiura Plant, Hitachi Construction Machinery Co., Ltd. Stock company Tsuchiura factory

Claims (3)

[Claims] 1. When bolting two objects to be fastened,
A bolt / nut fastener for fastening a nut to a bolt passed through an object to be fastened, comprising: a base member having a handle; a base member supported by the base member; and a head of the bolt or the nut. A second arm including a first arm having a first holding part for holding and a second holding part movably supported by the base member via a slide mechanism and holding the other of the head of the bolt and the nut. An arm, a biasing means provided between the first arm and the second arm, for biasing the second arm toward the first arm, and provided in any one of the first arm and the second arm, A bolt / nut fastener, comprising: a rotary drive mechanism that rotationally drives a corresponding holding portion. 2. The bolt / nut fastener according to claim 1, wherein the first holding portion is a bolt holding portion that holds the head of the bolt, and the second holding portion is a nut holding portion that holds the nut. And the rotary drive mechanism is the second
A bolt / nut fastener which is provided on an arm and rotationally drives the nut holder. 3. An erector ring rotatably supported on the rear part of the shield machine so as to be rotatable around the shield axis line, and movably supported by the erector ring in the shield radial direction.
An erector device having a segment gripping part for gripping a segment, wherein the segment gripping part is provided with a holding means for removably holding the bolt / nut fastener.