JPH0714480Y2 - Segment gripping device in segment assembly device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a segment gripping device in a segment assembling device arranged in a shield machine, for example.

2. Description of the Related Art In a segment assembling apparatus for assembling a segment, which is disposed in the rear part of a shield machine and carried in, into a hole that has been excavated, a gripping device that grips a segment is, for example, a second one.
As shown in the figure. This gripping device has a gripping part frame 51
A male thread portion 54 for gripping the tip end of the drive shaft 53 is arranged in a vertically extending casing 52 while being biased by a coil spring 55 so as to project therefrom. When gripping the segment A, first, the male thread portion 54 for gripping, for example, the female thread portion for gripping B formed at the center of the segment A is opposed to this male thread portion 54 for gripping and is pressed as shown by the imaginary line (a) to drive. The shaft 53 retreats against the coil spring as shown by an imaginary line (b). Next, when the hydraulic motor 56 is driven, the drive gear 57 drives the driven gear.
Power is transmitted via 58 to a support cylinder 59 that is fitted onto the drive shaft so that it can move only in the axial direction, and the rotation of the support cylinder 59 drives the drive shaft 53 to rotate. As a result, the male screw portion 54 for gripping is rotated and is urged toward the segment side by the coil spring 55, and fitted into the female screw portion B for gripping. At the time of removal, the hydraulic motor 56 is rotated in the reverse direction.

However, according to the above-described conventional configuration, since the male gripping screw portion 54 is in the protruding state in the gripping frame 51 of the segment during standby, when the segment A is gripped, the segment A and the gripping portion frame 51 are The segment A has to be carried in with a gap l larger than the protrusion of the gripping male screw portion 54 between them, and the carrying-in position of the segment A is restricted.

The present invention eliminates the protruding portion of the male thread for gripping to eliminate the restriction on the loading position of the segment, and the segment gripping device in the segment assembling device can be gripped even when the segment is slid on the gripping part frame and loaded. The purpose is to provide.

Means for Solving the Problems In order to solve the above problems, the present invention provides a drive shaft having a gripping male screw portion at a tip end thereof which can be screwed into a gripping female screw portion formed in a segment in an axial direction. It is provided so as to be able to move back and forth from the inside of the casing that opens to the grip frame via a support cylinder that is movably supported only in the axial direction of the drive shaft between the male thread for gripping and the support cylinder. A screw thread for extruding, and a male screw portion for extruding formed on the outer periphery of the extruding screw tube is screwed to move the extruding screw tube in the axial direction in association with the rotation of the drive shaft. A movable female screw portion for extrusion is provided in the casing, an extrusion spring is interposed between the screw cylinder for extrusion and the male screw portion for grasping, and a pulling spring is provided between the base end of the drive shaft and the support cylinder. Forward and reverse rotation is possible by rotating the drive shaft by interlocking with the support cylinder through a return spring. The rotary drive device is provided.

Action In the above configuration, the segment is carried in along the surface of the grip frame, and is arranged so that the gripping internal thread portion of the segment faces the gripping external thread portion in the casing.
Then, the rotation drive device rotates the drive shaft and the screw cylinder for extrusion through the support cylinder, and the male screw portion for extrusion and the female screw portion for extrusion move the extrusion screw cylinder in the protruding direction to extrude. The spring for use is compressed, and the male screw portion for gripping is urged toward the female screw portion for gripping by the spring force of the pushing spring. Then,
The male thread for gripping is smoothly screwed in and fitted. At the time of disengagement, by rotating the rotary drive device in the reverse direction, the male thread for gripping is pulled out from the female thread for gripping the segment, and the screw cylinder for extrusion is retracted and pulled back into the casing by the spring for pulling back. Be done.

Embodiment An embodiment of the present invention will be described below with reference to FIG.

Reference numeral 1 denotes a gripping part frame arranged on the gripping surface of the segment gripping device, and a through hole 2 of the gripping frame 1 is connected to a cylindrical first casing 3 and a second casing 5 via an internal thread ring 4. The casing casing 6 is vertically fixed so that its opening surface is flush with the surface. This casing cylinder 6
Inside, a drive shaft 8 having a male screw portion 7 for gripping at the tip,
The male screw portion 7 for gripping is fitted in the casing cylinder 6 so as to be able to move back and forth, and the drive shaft 8 has a male screw portion 7 for gripping at the tip end and a corner having a square cross section located in the casing 3. Cylindrical part 9 and a small diameter part that projects from the inside of the casing 3 at the base end part
10 and a locking collar 11 attached to the lower end of the small diameter portion 10. The male screw portion 7 for gripping is formed so as to be screwed into a female screw portion B for gripping formed in the central portion of the segment A to be gripped, and the lower end portion thereof is a step portion on the base end side of the opening of the first casing 3. A brim-shaped stopper portion 7a is formed which is locked to the 3a and serves as a protruding limit of the male screw portion 7 for gripping. On the base end side of the square tube portion 9, it is movable only in the axial direction with respect to the square tube portion 9 (that is, it is slidable in the axial direction and is prevented from rotating).
A support cylinder 12 having a fitting hole 12a is externally fitted so that rotation can be transmitted, and the support cylinder 12 is rotatably supported by the second casing 5 via a bearing 13.

The square tube portion 9 between the male screw portion 7 for gripping and the support tube 12 is movable only in the axial direction with respect to the square tube portion 9 (that is, slidable in the axial direction and non-rotating). Mating hole
A screw cylinder for extrusion 14 having 14a is externally fitted so that rotation can be transmitted. On the outer peripheral surface of the pushing screw cylinder 14, there is a pushing male screw portion 14b in the same direction as the holding male screw portion 7 screwed to the female pushing screw portion 4a formed on the female ring 4 over the entire length. The entire length of the pushing screw cylinder 14 is limited to the base end where the pushing screw cylinder 14 contacts the support cylinder 12 and the tip end where the stopper portion 7a of the gripping male screw portion 7 contacts the step portion 3a. Also, the male screw portion 14b for extrusion is set so as to be screwed into the female screw portion 4a for extrusion. A counterbore portion 14c is formed around the fitting hole 14a on the tip end side of the pushing screw cylinder 14, and a square tubular portion 9 is externally fitted between the counterbore portion 14c and the gripping male screw portion 7. An extruding coil spring 15 is interposed to urge the gripping male screw portion 7, that is, the drive shaft 8 toward the tip side. Also,
A coil spring 16 for pulling back fitted on the small diameter portion 10 is interposed between the support cylinder 12 and the locking collar portion, and biases the drive shaft 8 toward the reference side. At the retracted position shown by the solid line in FIG. 1, the pushing coil spring 15 and the pulling coil spring 16 are set to be balanced with each other with the holding male screw portion 7 housed in the casing tube 6. There is.

Reference numeral 17 denotes a passive gear fixed to a portion of the support cylinder 12 projecting from the casing cylinder 6 toward the base end side. The passive gear 17 is mounted on the second casing 5 via a mounting member 18 and is capable of normal and reverse rotation.
A drive gear 20 meshing with the passive gear 17 is fixed to the output shaft 19a of the drive shaft 8, and the drive shaft 8 is rotationally driven by the hydraulic motor 19 via the support cylinder 12.

Next, a method of gripping the segment A by this gripping device will be described.

First, the segment A is carried in along the surface of the grip frame 1, and the female screw portion B for gripping is opposed to the male screw portion 7 for gripping. Next, when the hydraulic motor 19 is rotationally driven in the direction of arrow C, the support cylinder 12 is rotated in the direction of arrow D via the drive gear 20 and the passive gear 17, and the pushing screw cylinder 14 is driven via the drive shaft 8.
Rotates in the direction of arrow D. Then, this screw cylinder for extrusion 14
The arrow E protruding from the outer peripheral thread portion for extrusion 14b is screwed into the female thread portion for extrusion 4a of the female thread ring 4.
Is moved in the direction to compress the pushing coil spring 15. Then, the male screw portion 7 for gripping is resisted against the force of the coil spring 16 for pulling back.
Is gradually urged in the direction of the protruding arrow E, and the male gripping screw portion 7 is fitted to the female gripping screw portion and projects into the segment A. When the male gripping screw portion 7 is screwed in to a certain position, the stopper portion 7a is brought into contact with the stepped portion 3a of the casing cylinder 6, the hydraulic motor 19 is stopped, and the gripping is completed.

When the segment A is to be disengaged after moving to the predetermined position, the hydraulic motor 19 is rotated in the opposite arrow F direction to drive the drive shaft 8
And the pushing screw cylinder 14 is rotated in the direction of arrow G, and the male screw portion 7 for gripping is moved in the direction of backward arrow H by the urging force of the coil spring 16 for pulling back, and the male screw portion 14b for pushing and The pushing screw cylinder 14 is retracted in the H direction by the action of the pushing female screw portion 4a. Then, when the male screw portion 7 for gripping is disengaged from the female screw portion B for gripping and the screw cylinder 14 for pushing abuts the supporting cylinder, the hydraulic motor 19 is stopped and the work is completed.

In the above-mentioned embodiment, the drive shaft 8 is formed into a rectangular tube portion 9 having a rectangular cross section.
However, it may be a sliding key or a spline shaft.

Advantageous Effects of Invention According to the present invention as described above, with the male thread portion for gripping being housed in the casing, the segments are arranged along the frame of the gripping portion and the extruding screw tube is moved to project. The holding spring can be gradually compressed to urge the holding male screw portion in the projecting direction, so that the holding male screw portion of the segment can be securely fitted. At the time of disengagement, the drive shaft is rotated in the reverse direction to pull out the male thread for gripping from the female thread for gripping the segment, and the screw cylinder for extrusion is moved backwards. Pull back and release. Therefore, it is not necessary to form a gap between the segment and the grip frame at the time of gripping the segment as in the prior art, and the segment can be slid on the grip frame to be supplied, and the supply can be easily performed. In addition, the male thread for gripping is gradually pressed against the male thread for gripping the segment by the pushing spring, so that the screw head is not damaged and only one of the pushing spring or the pulling spring is adjusted. Thus, the pressing force can be easily adjusted. Further, since the pull-back spring pulls the pull-back spring apart when it is separated, there is no need to press the gripping screw segment as in the conventional case, and the segment displacement can be reliably prevented.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a segment gripping device of the present invention,
FIG. 2 is a vertical sectional view showing a conventional segment gripping device. A ... Segment, B ... Gripping female thread, 1 ... Gripping frame, 4b ... Extrusion female thread, 6 ... Casing cylinder, 7 ... Gripping male thread, 8 ... Drive shaft , 9 ... Square tube part, 12 ... Support tube, 14 ... Extrusion screw tube, 14b ... Extrusion male thread part, 15 ... Extrusion coil spring, 16 ... Pull back coil spring, 17 ... … Passive gear, 19 …… hydraulic motor, 20 ……
Drive gear.

Claims (1)

[Scope of utility model registration request] 1. A grip is provided through a support cylinder that movably supports only a drive shaft having a gripping male threaded portion that can be screwed into a gripping female threaded portion formed on a segment in the axial direction. Provided so as to be capable of retracting from the inside of the casing that opens to the partial frame, and fit a screw cylinder for extrusion that is movable only in the axial direction to the drive shaft between the male thread for gripping and the support cylinder,
A male screw portion for extrusion formed on the outer periphery of the screw barrel for extrusion is screwed into the inside of the casing, and a female screw portion for extrusion that can move the screw barrel for extrusion in the axial direction is interlocked with the rotation of the drive shaft. An extruding spring is provided between the extruding screw cylinder and the male screw portion for gripping, and a pullback spring is interposed between the base end portion of the drive shaft and the supporting cylinder. A segment gripping device in a segment assembling device, which is provided with a rotation drive device that is interlocked and connected to rotate a drive shaft and is capable of rotating in the forward and reverse directions.