JP2552934B2 - Segment bolting device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a segment bolt fastening device, and more particularly to a segment bolt fastening device capable of automatically and more firmly tightening bolts. .

[Prior Art] In a shield machine, automation of bolt fastening work has been proposed in order to eliminate unsafeness in manually fastening between segment pieces arranged by an erector device. An example of realizing such automation is disclosed in Japanese Patent Laid-Open No. 1-263398.

This is a main body provided in the arc part of the erector band so as to be driven to move along the arc, and is hung vertically to the main part, and is vertically driven, revolving drive and horizontal drive with respect to the main part. Bolt arm provided as described above, a nut arm having a nut gripping portion at the lower end and provided to face the bolt arm, a bolt attached to the erector hand, and a nut supply device. .

With such a bolt fastening device, grasp the bolts and nuts one by one, position the nuts at the bolt holes to be fastened,
Insert the bolt into the bolt hole and rotate the nut with the nut arm to tighten it.

[Problems to be Solved by the Invention] However, in such a conventional bolt fastening device, since the nut is fastened to the bolt by the torque when rotated by the nut drive member, the fastening force is If not enough, and some impact force is repeatedly applied to the segment, the fastening of the bolt and the nut may be loosened.

The present invention has been made in view of the above problems, and an object thereof is to provide a bolt fastening device for a segment which can automatically and strongly fasten a bolt and a nut.

[Means for Solving the Problem] In order to achieve the above-mentioned object, the present invention provides a main body part provided in an arc part of an erector hand so as to be movable along the arc part, and a vertical motion in the main part. A bolt arm that is pivotally and horizontally movable and has a bolt grasping portion at the lower end, and a nut grasping portion that is vertically movable, pivotally movable, and horizontally movable at the main body and that faces the bolt grasping portion at the lower end. The arm for the nut, the bolt attached to the erector hand, the nut supply device, and the nut grasping part of the arm for the nut are provided, and also have ratchet teeth on the outer circumference, and the nut is included inside and integrated with this. Nut holder that rotates around, a drive member that rotationally drives the nut holder and the nut, a power transmission member that transmits the drive force of the drive member to the nut holder, and a nut arm A ratchet arm having a ratchet pawl that is rotatably attached to the inside thereof and that engages with the ratchet teeth, and a ratchet drive member that rotationally drives the ratchet arm, and the ratchet arm rotates with the nut in the nut tightening direction, The gist is that the nut is loosely rotated in the loosening direction.

[Operation] In the bolt fastening device of the present invention, in the first stage of bolt fastening, a set of bolts and nuts is supplied, and the grasped bolts and nuts are positioned at the bolt holes to be fastened.
Insert the bolt into the hole with the bolt arm and rotate the nut with the nut arm to tighten. During this time, since the nut rotates in the tightening direction, the ratchet arm is relatively rotating in the opposite direction, that is, in the direction in which the nut is loosened. It is done smoothly. After the completion of the tightening, the bolt is tightened by the operation of the ratchet mechanism as the second step of tightening the bolt. At this stage, when the ratchet drive member is actuated to rotate the ratchet arm, the ratchet accordingly rotates in the nut tightening direction. As a result, when the ratchet pawl engages with the ratchet teeth to rotate the nut holder, the nut also rotates together, and the bolts and nuts are firmly tightened.

[Embodiment] FIGS. 1 to 7 are views showing an embodiment of a bolt fastening device for a segment according to the present invention.

In this embodiment, the main body 1 is attached to the arc portion of the erector hand so as to be movable along the arc portion. The main body portion 1 is provided with a fastening portion 6 including a nut portion 3 having a nut arm 2 and a bolt portion 5 having a bolt arm 4 so as to be vertically movable, rotatable and horizontally movable. The bolt and nut supply device 7 is attached to the erector hand 8.

On both sides of the tip arc portion 9 of the erector hand 8, there are provided two upper and lower rails 10 extending along the arc and an arc rack 11 extending therebetween.

To the base 12 of the main body 1, four slides 13 that are vertically engaged with two rails 10 are fixed, and a pinion 14 that meshes with the rack 11 is attached. The pinion 14 is a motor 15 It is designed to be driven to rotate by.

In this way, the main body 1 can move along the arcuate portion 9 of the erector hand 8.

Members for moving the bolt fastening portion 6 up and down, turning, and horizontally are sequentially attached to the main body base 12. An upper and lower slide seat plate 16 is provided so as to be vertically driven by a servo motor 17, and a servo motor 19 for swinging a swivel seat plate 18 is fixed to the seat plate 16. A slide seat plate 21 that is horizontally moved by a servomotor 20 is provided on the swivel seat plate 18, and the bolt fastening portion 6 is attached to the seat plate 21.

In this way, the bolt fastening portion 6 is vertically and horizontally rotated with respect to the main body portion 1, and is horizontally driven.

The bolt fastening portion 6 is, as shown in FIGS. 6 and 7,
A nut portion 3 provided with a nut arm 2 having a nut gripping portion 22 that is driven to rotate at the lower end, and a bolt gripping portion 23 at the lower end.
And a bolt portion 5 provided with a bolt arm 4 having. The nut portion 3 is formed by projecting the nut arm 2 on the nut portion main body 24, and is provided so as to move horizontally with respect to the seat plate 21 by the cylinder 25. A hydraulic motor 27 that rotationally drives the shaft 26 is provided at the end of the nut body 24, and the rotation of the shaft 26 rotates the nut gripping portion 22 via a gear train 28 incorporated in the nut arm 2. It is designed to drive. The nut grasping portion 22 has a hexagonal nut hole 29 for accommodating the nut formed at the center thereof,
A nut holder 31 provided with a plurality of ratchet teeth 30 is provided on the outer peripheral portion. The nut holder 31 is operatively connected to the gear train 28 and rotates integrally with the nut.

A ratchet arm 32 is attached to the nut arm 2 so as to be rotatable with respect to the nut arm 2 in the direction of arrow S or in the opposite direction. This ratchet arm 32 has a through hole 33 into which the nut holder 31 is inserted.
A ratchet pawl is formed adjacent to the through hole 33.
34 are provided. The ratchet pawl 34 is rotatably attached by a pin 35 in the vicinity of the through hole 33 of the ratchet arm 32, and a regulation pin 36 for stopping the rotation of the ratchet pawl 34 is provided at the rear position of the ratchet pawl 34. . Also, ratchet arm 32 and ratchet claw
A spring 37 is connected to the position 34 to regulate the ratchet pawl 34 36
Is urged to. Further, a drive cylinder 38 as a ratchet drive member is attached to the nut arm 2,
The piston rod of the drive cylinder 38 is connected to the free end of the ratchet arm 32 and drives the ratchet arm 32 to rotate. And the ratchet tooth 3
The ratchet mechanism is constituted by 0, the ratchet arm 32, the ratchet claw 34, and the drive cylinder 38.

On the other hand, the bolt portion 5 is formed by projecting the bolt arm 4 on the bolt portion main body 39, and the bolt portion main body 39 is horizontally moved by the cylinder 40 with respect to the nut portion main body 24. A bolt grasping portion 23 is formed at the tip of the bolt arm 4.

In this way, the nut arm 2 and the bolt arm 4 are arranged so as to face each other, and can independently move toward and away from each other. Then, the bolt gripping portion 23 and the nut gripping portion provided on the respective tip portions
With 22, it is possible to take out the bolt and the nut from the bolt and nut supply device 7, move the bolt fastening portion 6 to a desired position, and perform the bolt fastening.

The operation of the bolt fastening device of the segment having such a configuration will be described below.

The main body 1 is moved along the arc portion 9 of the erector hand 8, and the bolt / nut supply device 7 attached to the erector hand 8 is moved to the bolt arm 4 of the bolt fastening portion 6.
Bolt gripping part 23 and nut gripping part 22 of the nut arm 2
Grasp the set of bolts 41 and nuts 42 with and take out.

Then, the bolt fastening part 6 is moved in each direction to position the grasped bolt and nut at the bolt hole to be fastened, and the bolt arm 4 inserts the bolt 41 into the bolt hole to perform the first bolt fastening. The hydraulic motor 27 is driven as a step operation. Then, the power of the hydraulic motor 27 is transmitted to the nut grasping portion 22 of the nut arm 2 via the gear train 28, and the nut 42 is rotated together with the nut holder 31 to be tightened. During this rotation operation, the nut holder 31 and the nut 42 rotate in the tightening direction, so the ratchet arm
The 32 and the ratchet pawl 34 are relatively rotating in the opposite direction, that is, in the direction in which the nut 42 is loosened, and rotate idly with respect to the nut halter 31. Therefore, the nut holder 31 and the nut 42 rotate smoothly.

After the completion of the tightening, the bolt is tightened by the operation of the ratchet mechanism as the operation of the second step of tightening the bolt. At this stage, drive cylinder 38
When the piston rod extends, the ratchet arm 32 rotates in the direction opposite to the arrow S in FIG. 7, but at this time, the ratchet pawl 34 moves past the ratchet tooth 30 and advances, and the ratchet arm 32 idles. . Next, when the piston rod retracts, the ratchet arm 32
Rotates in the direction of arrow S. As a result, the ratchet pawl 34 engages with the ratchet teeth 30 of the nut holder 31 to rotate the nut holder 31, the nut 42 also rotates together, and the bolts and nuts are firmly tightened.

Since at least one set of the bolt fastening portions 6 is provided together with the body portion 1, it is possible to simultaneously fasten the bolts at both axial ends or circumferential both ends of the segment piece. In this case, since the bolt fastening portion 6 can rotate and move horizontally, it is also possible to fasten the bolt on the end face inclined to the axis like the key segment.

[Effects of the Invention] As described above, according to the present invention, it is possible to automate the process from taking out bolts and nuts to fastening them.
By installing the ratchet mechanism, it is possible to further tighten the bolts and nuts.

[Brief description of drawings]

FIG. 1 is a front view showing an outline of an embodiment of a bolt fastening device for a segment according to the present invention, and FIG. 2 is a bolt fastening device of FIG. 1, showing a right side surface of FIG. 3 and 4 show the apparatus main body 1 used in the bolt fastening device of FIGS. 1 and 2, in which the swivel seat plate 18 is swung 90 degrees counterclockwise by the servomotor 19 except for the bolt portion 5. 4 is a right side view of the apparatus main body 1 shown in FIG. 4, and FIG. 4 shows the apparatus main body 1 used in the bolt fastening device of FIGS.
FIG. 5 is a left side view of the apparatus main body 1 except for 15, FIG. 5 is a plan view showing the apparatus main body 1 of FIG. 4 from above, FIG. 6 is a schematic front view of the bolt fastening portion of the embodiment, and FIG. FIG. 7 is a sectional view showing a drive mechanism system of the bolt fastening portion shown in FIG. 6. 1 ... Body part, 2 ... Nut arm 3 ... Nut part, 4 ... Bolt arm 5 ... Bolt part, 6 ... Bolt fastening part 7 ... Bolt and nut supply device 8 ... Electa hand, 9 ...... Arc part 22 ...... Nut grip part, 23 ...... Bolt grip part 27 ...... Hydraulic motor (drive member) 28 ...... Gear train (power transmission member) 30 ...... Ratchet teeth, 31 ...... Nut holder 32 ... … Ratchet arm, 34 …… Ratchet claw 38 …… Drive cylinder (ratchet drive member)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hitoshi Ueno 2-5-8 Kita-Aoyama, Minato-ku, Tokyo Within a stock company group (72) Inventor Kazumi Shino 2-5-8 Kita-Aoyama, Minato-ku, Tokyo Stock company (56) References JP-A-1-263398 (JP, A) Actually developed 62-195463 (JP, U)

Claims (1)

(57) [Claims] 1. A main body portion provided on an arc portion of an erector hand so as to be movable along the arc portion, and a main body portion provided for vertical movement, turning movement and horizontal movement, and a bolt gripping portion at a lower end thereof. A bolt arm having a nut arm provided on the main body for vertical movement, swivel movement, and horizontal movement, and having a nut gripping portion at the lower end facing the bolt gripping portion, and a bolt attached to the erector hand, The nut feeder is provided in the nut gripping part of the nut arm and has ratchet teeth on the outer circumference. The nut holder contains the nut inside and rotates integrally with the nut holder. The nut holder and the nut are driven to rotate. A drive member, a power transmission member that transmits the drive force of the drive member to the nut holder, and a ratchet tooth that is rotatably mounted on the nut arm. A ratchet arm having a ratchet pawl that engages with a ratchet arm and a ratchet drive member that rotationally drives the ratchet arm are provided.The ratchet arm rotates with the nut in the nut tightening direction, while idling with respect to the nut in the loosening direction. A bolt fastening device for a segment, which is characterized in that