JPH0245359Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a segment holding device in an erector device of a conveyor excavator.

Structure of conventional example and its problems Usually, a shield excavator is provided with an erector device for lifting the segment to a predetermined position on the inner surface of the hole. This erector device is composed of a swing ring, an arm body supported by the swing ring via a hydraulic cylinder so as to be able to rise and fall freely, and a segment holder attached to the arm body. By the way, this segment holder is only for lifting the segment. For example, after the segment is installed in a predetermined position, the hanging bracket screwed onto the segment is removed manually, and therefore the hanging bracket is removed manually. If the position of is above,
There is a risk of accidentally dropping the hanging bracket, and
As the segments become larger, the weight of the hanging fittings also increases, which has the drawback of making it impossible to handle them manually.

OBJECT OF THE INVENTION It is an object of the present invention to provide a segment holding device that eliminates the above-mentioned conventional drawbacks.

Structure of the Invention In order to achieve the above object, the segment holding device of the present invention is a segment holding device supported by an arm body provided on a rotating ring so as to be able to rise and fall freely, and the segment holding device is a cylindrical body having a hollow hole opened at one end. The other end of the holder is supported on the arm body side, and the other end of the holder is provided with an engaging part that can be freely engaged with and detached from the suspension fitting of the segment. is inserted into the hollow hole and movably in the axial direction thereof, a spring body is arranged in the cylinder body to bias the holding body inward through the flange portion, and on one end side of the cylinder body,
A ring gear is rotatably fitted onto the holder and allows movement only in the axial direction of the holder, and the cylinder body is provided with a rotational drive device for rotating the ring gear.

Embodiment and operation Hereinafter, an embodiment of the present invention will be described based on FIGS. 1 to 4. Reference numeral 1 denotes an erector device provided in the shield body 2 for lifting the segment a, which is rotatably supported in a vertical plane via a plurality of support rollers 4 arranged in an inner cylinder 3 provided in the shield body 2. a swing ring 5, a pair of first hydraulic cylinders 6 attached to the swing ring 5 at left and right positions, a semicircular arc-shaped arm body 7 whose both ends are held by the pair of first hydraulic cylinders 6, The segment holding device 8 according to the present invention is held at the center of the arm body 7.

Hereinafter, this segment holding device 8 will be explained in detail. That is, 9 is the front and rear side plates 7 of the arm body 7.
A support body movably supported by a pair of left and right guide rods 10 provided between a and 7b, the rod portion of which is connected to the cylinder body portion 11a of the second hydraulic cylinder 11 connected to the front side plate 7a, for example. They are connected and can move freely in the front and rear directions. Reference numeral 12 denotes a cylinder body having a hollow hole 13 with one end open, and the other end supported by a mounting bracket 15 protruding from the lower surface of the support body 9 via a support pin 14 parallel to the axis of the shield body. There is. Reference numeral 16 denotes a holder having an engaging portion 16a at one end that can be freely engaged and detached from the hanging fitting 17 of the segment, and a shaft portion 16b at the other end that moves into the hollow hole 13 of the cylinder body 12 in its axial direction. A flange portion 16c is formed at the other end so that it can be inserted. The engaging portion 16a is shaped to fit into the recessed portion 17a of the hanging fitting 17, and has a through hole 19 of the same size as the through hole 18 formed in the hanging fitting 17. Therefore, the engaging portion 16
a and the hanging fitting 17 can be engaged with each other by inserting connecting pins (not shown) into the respective through holes 18 and 19. Reference numeral 20 denotes a ring gear externally fitted onto the shaft portion 16b of the holder 16 via a sliding key 21 so as to allow the holder 16 to move only in the axial direction.
It is rotatably supported via 2. Reference numeral 23 denotes a hydraulic motor (rotary drive device) provided on the outer periphery of the cylinder body 12, and a pinion 24 attached to its output shaft is meshed with the ring gear 20. Reference numeral 25 denotes a compression spring (spring body) interposed between the flange portion 16c of the holder 16 and the ring gear 20, which always biases the holder 16 in the direction of drawing it into the hollow hole 13. Reference numeral 26 denotes a ring body screwed onto the lower part of the inner surface of the hollow hole 13, and is used to restrict the amount of protrusion of the holding body 16. 27 is ring body 2
6 is a proximity switch embedded in the side wall of the cylinder body 12 at a position immediately above and used to detect when the flange portion 16c of the holding body 16 has reached the regulating position where it abuts against the ring body 26. Incidentally, spherical bearings 28 and 29 are interposed at the connecting portion between the cylinder body 12 and the support pin 14, and the holder 1
The inner peripheral surface of the through hole 19 of the engaging portion 16a of No. 6 is formed into a spherical surface. Further, 30 is a third hydraulic cylinder for pressing segments arranged on both left and right sides of the support body 9. Furthermore, 31 is a guide bush attached to the outer periphery of the flange portion 16c of the holder 16. In FIG. 1, 32 is a hydraulic motor for rotating the swing ring 5, and 33 is a hydraulic hose for supplying pressure oil to each of the above-mentioned hydraulic devices and a winding device for a proximity switch electric wire.

Hereinafter, the effects of the above configuration will be explained.

First, the swivel ring 5 is rotated and the second hydraulic cylinder 11 is operated to move the holding body 16 to a position corresponding to the hanging fitting 17 of the segment a. Next, after extending the first hydraulic cylinder 6 and inserting the engaging part 16a of the holder 16 into the recessed part 17a of the hanging fitting 17, a connecting pin (not shown) is inserted across both the through holes 18 and 19. Insert. next,
Segment a is pulled up a little and the third hydraulic cylinders 30, 30 on both sides are extended to press and fix segment a from both sides, and then it is lifted to a predetermined position, for example an upper position, on the inner surface of the tunnel and set on the inner surface of the tunnel.

Next, a procedure for removing the hanging fitting 17 will be explained. First, the third hydraulic cylinders 30, 30 are contracted and the arm body 7 is moved inward. By the way, since the holding body 16 is connected to the hanging fitting 17, only the cylinder body 12 follows the arm body 7 against the compression spring 25. Therefore,
Apparently, the flange portion 16c of the holding body 16 moves outward. When the flange portion 16c reaches the proximity switch 27, the proximity switch 27
The movement of the arm body 7 is stopped by this signal. This operation secures the space necessary for pulling out the hanging fitting 17. Next, the holding body 16 is rotated by the hydraulic motor 23 in a direction to remove the hanging fitting 17, and the hanging fitting 17 is loosened and completely removed. Note that while the hanging fitting 17 is being loosened, since the hanging fitting 17 is urged in the direction of removal by the compression spring 25, it can be pulled out smoothly. Further, since spherical bearings 28 and 29 are interposed at the connecting portion between the cylinder body 12 and the support pin 14, and the inner surface of the through hole 19 through which the connecting pin is inserted is formed into a spherical surface, even if the engaging portion 16a Even if the center positions of the hanging fittings 17 are shifted from each other, the hanging fittings 17 can be rotated without breaking.

Effects of the Invention According to the configuration of the present invention described above, after the segment is attached to a predetermined position by the holder, if the holder is rotated by the rotary drive device, the hanging fitting of the segment can be automatically removed. Unlike the conventional manual work, even if the hanging fitting is heavy, it can be removed safely and easily. Furthermore, when removing the hanging bracket, the holding body can be rotated while being pulled against the spring body, so the hanging bracket can be loosened while being pulled, and the hanging bracket can therefore be removed extremely smoothly. .

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a cross-sectional view, FIG. 2 is a view taken in the direction of the - arrow in FIG.
The drawing is an enlarged front view of the main part, and FIG. 4 is a cross-sectional view taken from FIG. 3. 1...Erector device, 2...Shield body,
5...Swivel ring, 7...Arm body, 8...Segment holding device, 12...Cylinder body, 13...
...Hollow hole, 14...Support pin, 16...Holding body,
16a...Engagement part, 16b...Shaft part, 16c...
Flange portion, 17... Hanging fitting, 20... Ring gear, 21... Sliding key, 23... Hydraulic motor, 24... Pinion, 25... Compression spring, 27
... Proximity switch, 28, 29 ... Spherical bearing.

Claims (1)

[Scope of utility model registration request] The segment holding device is supported by an arm body provided on a revolving ring so as to be able to rise and fall, the other end of the cylinder body having a hollow hole opening at one end is supported on the arm body side, and a hanging metal fitting for the segment is attached to one end. A flange portion is provided at the other end of the holder provided with an engaging portion that can be freely engaged and detached from the holder, and the flange portion side of the holder is inserted movably in the axial direction of the hollow hole. A spring body is disposed in the cylinder body to bias the holding body inward through a flange portion, and a spring body is fitted onto the outside of the holding body on one end side of the cylinder body and only moves in the axial direction of the holding body. A segment holding device characterized in that a ring gear is rotatably provided, and a rotation drive device for rotating the ring gear is provided on the cylinder body.