JPH09217597A - Nut feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automate feeding of nuts to a segment fastening device in a shield machine by taking out the nuts one by one from 5 nut stocker, and holding the nut by chuck units to transfer the nut. SOLUTION: Nuts stacked being fitted to the periphery of an vertical pipe in a nut stocker 3 are pushed up to suck the uppermost nut to a nut holder, and the nut holder is vertically erected to change the attitude of the nut. A pair of jaws of chuck units 17 fixed onto a chuck reversing unit 28 are inserted in the hollow part of the nut and separated from each other to hold the nut. A fork unit 36 disposed almost horizontally on a platform 56 of a segment erector has an intermediate fork, a tip fork and a sliding plate placed one upon another in three stages so as to be slidable onto a frame, and the chuck reversing unit 28 and the chuck units 17 mounted on the sliding plate in the uppermost layer transfer the nut from the nut stocker 3 to a segment fastening device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nut feeder, and more particularly to a nut feeder used as a segment fastening device attached to a segment assembly machine used in a shield construction method.

[0002]

2. Description of the Related Art Conventionally, a tunnel boring machine is used to successively excavate a hole, and every time the hole is dug a predetermined distance, a segment assembling machine provided at a rear portion of a shield machine excels a segment having a shape shown in FIG. A shield construction method is implemented in which 1 is annularly arranged along the inner peripheral surface of the above-mentioned drilling hole, and adjacent segments 1 are bolted together by a segment fastening device attached to the segment assembly machine to construct a tunnel circumferential wall. Has been done.

The segment 1 forming the peripheral wall of the tunnel has a convex curved surface 1a having a curvature corresponding to the inner peripheral surface of the excavation hole, a concave curved surface 1b to be the tunnel inner peripheral surface, a convex curved surface 1a and a concave curved surface 1b.
Is formed in a curved plate shape having a curved strip-shaped front-and-rear end surface 1c connected to each other and a rectangular circumferential end surface 1d connected to the convex curved surface 1a and the concave curved surface 1b.

In the vicinity of the front-rear end face 1c of the segment 1, there is an inter-ring fastening member hole 1e which is recessed from the concave curved surface 1b toward the convex curved surface 1a and which can accommodate an inter-ring fastening member such as a bolt or a nut. Are provided at predetermined intervals.

In the vicinity of the circumferential end surface 1d of the segment 1, there is an inter-piece fastening member hole 1f which is recessed from the concave curved surface 1b toward the convex curved surface 1a and which can accommodate an inter-piece fastening member such as a bolt or a nut. Are provided at predetermined intervals.

On the front-rear direction end face 1c, the inter-ring fastening member hole 1 of one segment 1 adjacent in the front-rear direction of the tunnel.
A bolt insertion hole 1g for inserting a bolt from e to the inter-ring fastening member hole 1e of the other segment 1 is formed.

A bolt insertion hole 1h for inserting a bolt from the inter-piece fastening member hole 1f of one segment 1 adjacent to the tunnel circumferential direction to the inter-piece fastening member hole 1f of the other segment 1 is formed in the circumferential end face 1d. Has been drilled.

Further, in the center of the segment 1, there is provided an engaging hole 1i which is recessed from the concave curved surface 1b toward the convex curved surface 1a and which can be engaged with the grip portion of the segment assembling machine.

That is, when constructing the tunnel peripheral wall, the grip portion of the segment assembling machine is engaged with the engaging hole 1i of the segment 1 and the segment 1 is made to follow the inner peripheral surface of the excavation hole by the segment assembling machine. And a segment fastening device is used to connect both segments 1 from the inter-piece fastening member hole 1f of one segment 1 adjacent in the tunnel circumferential direction by the segment fastening device.
Of the inter-piece fastening member hole 1f of the other segment 1 through the bolt insertion holes 1h, 1h of the other segment 1 into the inter-piece fastening member hole 1f of the other segment 1 A segment fastening device screw-engages a nut with a portion located at, and tightens the nut to fasten the segments 1 adjacent to each other in the tunnel circumferential direction.

Further, by means of the segment fastening device, the inter-ring fastening member hole 1e of one of the segments 1 adjacent to each other in the tunnel front-rear direction is connected to the bolt insertion holes 1g of the two segments 1.
The bolt which is the inter-ring fastening member is inserted through the ring 1g of the other segment 1 into the inter-ring fastening member hole 1e of the other segment 1 and the inter-ring fastening member hole 1e of the other segment 1 of the bolt
A segment fastening device screw-engages a nut with a portion located inside of the and the segments 1 adjacent to each other in the front-rear direction of the tunnel are fastened to each other.

[0011]

Conventionally, a nut is supplied to a segment fastening device manually by an operator, but in recent years, when forming a tunnel inner wall having a large cross section, the nut in the segment fastening work is formed. There is a demand for reliable supply within a short time.

The present invention has been made in view of the above situation, and an object thereof is to provide a nut supply device capable of automatically supplying a nut to a segment fastening device.

[0013]

In order to achieve the above object, in a nut supply device of the present invention, a nut stocker for storing a plurality of nuts and successively taking out the nuts,
A chuck unit that supports a nut taken out from the nut stocker, a chuck reversing unit that changes the posture of the chuck unit, and a chuck reversing unit and a chuck unit that are provided between the nut stocker and the segment fastening device and that move the chuck reversing unit and the chuck unit. It has a fork unit to let.

That is, in the nut supply device of the present invention,
The nut taken out from the nut stocker is supported by the chuck unit, and the chuck unit and the chuck reversing unit are moved to the vicinity of the segment fastening device by the fork unit.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 17 show an example of an embodiment of a nut feeding device of the present invention. This nut feeding device stores a plurality of nuts 2 and successively takes out the nuts 2 from a nut stocker 3 ( 4 to 6), a chuck unit 17 (see FIGS. 7 to 11) for supporting the nut 2 taken out from the nut stocker 3, and a chuck reversing unit 28 (FIG. 12) for changing the posture of the chuck unit 17. 14), a fork unit 36 (see FIGS. 16 and 17) provided between the nut stocker 3 and the segment fastening device (not shown) and for moving the chuck reversing unit 28 and the chuck unit 17 (see FIGS. 16 and 17). It has and.

First, the structure of the nut stocker 3 will be described with reference to FIGS.

The nut stocker 3 includes a nut guide 4 for vertically aligning a plurality of nuts 2, a nut lift bracket 8 for pushing the nuts 2 aligned by the nut guide 4 upward from below, and the nut lift. It is composed of a rodless cylinder 6 for raising and lowering the bracket 8, a nut holder 12 for sucking the nut 2 raised to the upper end portion of the nut guide 4, a standing rotary actuator 9 for changing the direction of the nut holder 12, and the like.

The nut guides 4 are made of pipe material and are provided substantially vertically in the vicinity of the left and right ends of the upper surface of the flat base plate 5.

The nut guide 4 has an outer diameter such that the nut 2 can be fitted up and down so that the nut 2 can be fitted up and down. Cap 4a is attached.

The rodless cylinder 6 has a cylinder 6c and a guide rod 6d which extend substantially vertically and whose upper end is fixed to the end plate 6a and whose lower end is fixed to the end plate 6b, respectively, and the cylinder 6c and the guide rod 6d.
And a moving block 6e which is fitted onto both of them so as to be slidable in the axial direction.

A piston (not shown) equipped with a permanent magnet is installed in the cylinder 6c so as to be slidable in the axial direction of the cylinder 6c, and a permanent magnet of the piston installed in the cylinder 6c is installed in the moving block 6e. A permanent magnet whose magnetism is aligned so as to be attracted is provided inside, and applies a fluid pressure to the upper fluid chamber formed by the inner surface of the cylinder 6c and the upper surface of the piston, and the inner surface of the cylinder 6c and the lower surface of the piston. When the lower fluid chamber formed by is released to the atmosphere, the moving block 6e descends as the piston moves, and applies a fluid pressure to the lower fluid chamber formed by the inner surface of the cylinder 6c and the lower surface of the piston. And cylinder 6
When the upper fluid chamber formed by the inner surface of c and the upper surface of the piston is released to the atmosphere, the moving block 6e rises as the piston moves.

The rodless cylinder 6 has a cylinder mounting plate 7 in the center of the upper surface of the base plate 5.
It is erected via a and 7b.

The nut lift bracket 8 has a nut push-up portion 8b which extends substantially horizontally and has notches 8a formed in the vicinity of both ends thereof so as to be loosely fitted to the nut guide 4, and the nut push-up portion 8b. The connecting portion 8c is continuous and extends substantially vertically.

The connecting portion 8c is fixed to the moving block 6e of the rodless cylinder 6 so that the notch 8a is loosely fitted in the nut guide 4, and the nut is placed so as to be located above the nut pushing portion 8b. When the moving block 6e is raised after the nut 2 is fitted onto the guide 4, the nut 2 is pushed up by the nut pushing portion 8b.

The upright rotary actuator 9 is orthogonal to the nut guide 4 and has a base plate 5.
The nut standing arm 10 extending in a direction perpendicular to the axis extending horizontally in the front-rear direction is rotated.

The upright rotary actuator 9 is
It is attached to the upper end of an actuator mounting bracket 11 which is provided upright on the left and right ends of the upper surface of the base plate 5.

Reference numeral 12 denotes a nut holder. The nut holder 12 has a shape that can be externally fitted to the nut 2 and internally houses a permanent magnet for attracting the nut 2.

The nut holder 12 is fixed to the tip of the nut raising arm 10 and applies a fluid pressure to one fluid chamber of the raising rotary actuator 9 and releases the other fluid chamber to the atmosphere. Arm for raising nut 1
0 is rotated to a substantially horizontal state, the nut holder 1
2 coaxially covers the upper end of the nut guide 4, applies fluid pressure to the other fluid chamber of the rotary actuator 9 for standing up, and releases one fluid chamber to the atmosphere to substantially vertically move the arm 10 for standing up the nut. The nut holder 12 is positioned above the upright rotary actuator 9 when it is rotated in such a state.

That is, when the nut 2 fitted on the nut guide 4 is pushed up as the nut lift bracket 8 is raised while the nut holder 12 covers the upper end of the nut guide 4, the nut guide 4 is pushed up. The uppermost one of the externally fitted nuts 2 is adsorbed to the nut holder 12, and the nut holder 12 moves above the upright rotary actuator 9 with the nut 2 adsorbed. Then, from the nut guide 4 to the nut 2
Are taken out.

Further, the nut stocker 3 includes a light projector 13
And a photoelectric switch 14 are provided.

The light projector 13 is mounted on the intermediate portion in the vertical direction of the cylinder mounting plate 7b via the sensor mounting plate 15 so that the light beam is emitted substantially horizontally toward the position just above the upper end of the nut guide 4. .

The photoelectric switch 14 is mounted on the intermediate portion in the vertical direction of the actuator mounting bracket 11 via a sensor mounting plate 16 so that the light beam emitted from the light projector 13 can be received.

The light beam emitted from the projector 13 toward the photoelectric switch 14 is located at the uppermost position of the nut 2 fitted onto the nut guide 4 by the nut lift bracket 8. Is pushed up above the predetermined position of the upper end of the nut guide 4,
The nut 2 blocks the light.

Next, the structure of the chuck unit 17 is shown in FIG.
11 to FIG.

The chuck unit 17 includes a pair of jaws 21 for supporting the nut 2, an opening / closing actuator 20 for moving the jaws 21 toward and away from each other, and a moving cylinder 18 for moving the opening / closing actuator 20 forward and backward.
A sleeve 22, a fixed casing 23, and a movable casing 24 that surround the opening / closing actuator 20 in the circumferential direction.
And so on.

The moving cylinder 18 has a housing 18a containing a piston (not shown), a pair of rods 18b that move forward and backward, and a connecting member 18c that connects the tips of the rods 18b to each other. There is.

The moving cylinder 18 is provided in the housing 1
When fluid pressure is applied to the fluid chamber on the one end side of the piston inside 8a and the fluid chamber on the other end side of the piston is released to the atmosphere, the rod 18b advances from the housing 18a toward one side, and the housing 18a When the fluid pressure is applied to the fluid chamber on the other end side of the piston inside the rod and the fluid chamber on the one end side of the piston is released to the atmosphere, the rod 18b retracts toward the housing 18a. .

A sensor (not shown) for detecting whether the rod 18b is in the forward movement state or the backward movement state is incorporated in the housing 18a.

A flange 19 is attached to the end surface of the connecting member 18c on the side opposite to the rod.

The opening / closing actuator 20 includes a housing 20a in which a piston (not shown) is housed, and a pair of fingers 20b which move toward and away from each other as the piston moves.
It has a support block 20c fixed to the end of the housing 20a on the side opposite to the fingers.

This opening / closing actuator 20 has a pair of fingers 20b when fluid pressure is applied to the fluid chamber on one end side of the piston inside the housing 20a and the fluid chamber on the other end side of the piston is released to the atmosphere. Are separated from each other in the open state, fluid pressure is applied to the fluid chamber on the other end side of the piston inside the housing 20a, and the fluid chamber on the one end side of the piston is released to the atmosphere.
It is configured so that b is close to each other and is in a closed state.

The support block 20c has fingers 20b.
A sensor (not shown) for detecting whether the vehicle is in the open state or the closed state is installed, and the support block 20
The end portion of the non-housing side of c is the opening / closing actuator 2
The flange 19 is mounted on the end surface of the flange 19 on the side opposite to the connecting member so that 0 is located substantially coaxially with the moving cylinder 18.

The jaw 21 has a tip portion formed into a shape that can be inserted into the hollow portion of the nut 2 and a base end portion fixed to the finger 20b of the opening / closing actuator 20, so that the tip portions are close to each other. When the jaws 21 are separated from each other after the nut 21 is inserted into the hollow portion of the nut 2, the tip of the jaw 21 is inscribed in the nut 2 to support the nut 2.

The sleeve 22 is used for the opening / closing actuator 2
0 housing 20a, fingers 20b, and jaws 2
It is arranged so as to surround 1 and is externally fitted and fixed to the housing 20a.

The fixed casing 23 is arranged so as to surround the support block 20c of the opening / closing actuator 20 and is fixed to the flange 19.

The moving casing 24 is fitted onto the sleeve 22 so as to be slidable in the axial direction of the sleeve 22.

A socket holder 25, which can come into contact with the above-mentioned nut holder 12 of the nut stocker 3 or the nut holder (not shown) of the segment fastening device, is externally fitted and fixed to the tip of the moving casing 24. ing.

Further, between the base end of the moving casing 24 and the fixed casing 23, there is provided a spring 26 for urging the moving casing 24 toward the side opposite to the moving cylinder side.

On the outer side of the moving casing 24, a stopper 27 for preventing the moving casing 24, which is biased by the spring 26, from coming out of the fixed casing 23 to the side opposite to the moving cylinder side is engaged with the flange 19. It is installed in a compatible manner.

Therefore, the rod 18 of the moving cylinder 18
When b is retracted with respect to the housing 18a,
When the jaw 21 is placed inside the moving casing 24 and the rod 18b of the moving cylinder 18 moves forward with respect to the housing 18a, the flange 19, the opening / closing actuator 20, the fixed casing 23, and the moving casing 24 move forward. At the same time, the spring 26 is compressed so that the opening / closing actuator 20 moves further forward than the moving casing 24, and the tip of the jaw 21 projects outward of the moving casing 24.

Next, the structure of the chuck reversing unit 28 will be described with reference to FIGS.

The chuck reversing unit 28 includes a tilting rotary actuator 29 for tilting the actuator mounting plate 34, a rotary rotary actuator 32 mounted on the actuator mounting plate 34 and rotating the chuck unit 17 as described above. It is configured.

The tilting rotary actuator 29 is configured to tilt the plate tilting arm 30 about the horizontal axis.

This tilting rotary actuator 29
Are mounted on the upper surface of the base plate 31.

The rotary rotary actuator 32 is configured to rotate the unit rotary arm 33 about an axis orthogonal to the horizontal axis.

This rotating rotary actuator 32
Are attached to the front and rear ends of the actuator mounting plate 34 that extends in the lateral direction and is fixed to the plate tilting arm 30.

The bracket 35 provided at the tip of the unit rotating arm 33 is attached to the chuck unit 1 described above.
7, a moving cylinder 18 of 7 is mounted, and a fluid pressure is applied to one fluid chamber of the rotary actuator 32 for rotation and the other fluid chamber is opened to the atmospheric pressure so that the unit rotation arm 33 is made substantially horizontal. When the chuck unit 17 is rotated to the state, the chuck unit 17 faces the front or the rear, applies fluid pressure to the other fluid chamber of the rotary actuator 32 for rotation, and releases one fluid chamber to the atmospheric pressure. When the turning arm 33 is turned in a substantially vertical state, the chuck unit 17 faces downward.

When the fluid pressure is applied to one fluid chamber of the tilting rotary actuator 29 and the other fluid chamber is released to the atmosphere, the plate tilting arm 30 is rotated in a substantially horizontal state. Is located at the side of the tilting rotary actuator 29, applies a fluid pressure to the other fluid chamber of the tilting rotary actuator 29, and releases one fluid chamber to the atmosphere to release the plate tilting arm. When 30 is rotated in a substantially vertical state,
The chuck unit 17 is located above the tilting rotary actuator 29.

Next, the structure of the fork unit 36 is shown in FIG.
6 and FIG.

The fork unit 36 includes a frame 37 that extends in the lateral direction, an intermediate fork 42 that moves along the frame 37, a tip fork 47 that moves along the intermediate fork 42, and a tip fork 47. A slide plate 52 that moves, a rodless cylinder 40 that moves the intermediate fork 42 and the tip fork 47 with respect to the frame 37, and a rodless cylinder 55 that moves the slide plate 52 with respect to the tip fork 47.
And so on.

The frame 37 is formed in the shape of a plate girder, and is positioned on the rear side of the segment fastening device (not shown).
(See FIG. 1) is fixed substantially horizontally.

On the upper surface of the frame 37, the frame 37
A pair of guide rails 38 extending over substantially the entire length of
A rack 39 is provided whose meshing portion faces the inside of the frame 37 and extends from the front-rear direction intermediate portion of the frame 37 to the tip portion.

The rodless cylinder 40 has a cylinder 40a which extends substantially horizontally and a moving block 40b which is fitted onto the cylinder 40a so as to be slidable in the axial direction thereof.

A piston (not shown) having a permanent magnet is installed in the cylinder 40a so as to be slidable in the axial direction of the cylinder 40a, and a moving block 40b is provided with a permanent magnet of the piston installed in the cylinder 40a. A permanent magnet whose magnetism is aligned so as to be attracted is provided inside, and applies a fluid pressure to one fluid chamber formed by the inner surface of the cylinder 40a and one surface of the piston and also the inner surface of the cylinder 40a and the other surface of the piston. When the other fluid chamber formed by and is released to the atmosphere, the moving block 40b advances toward the tip of the frame 37 as the piston moves, and the other of the other surface formed by the inner surface of the cylinder 40a and the other surface of the piston. When a fluid pressure is applied to the fluid chamber and one fluid chamber formed by the inner surface of the cylinder 40a and the one surface of the piston is released to the atmosphere, Moving block 40b with the movement of the piston is adapted to retract toward the proximal end portion of the frame 37.

The rodless cylinder 40 is mounted between the base end portion of the frame 37 and the intermediate portion in the front-rear direction, and the cylinder 40a is fixed to the inner bottom portion of the frame 37 by a bracket 41.

The intermediate fork 42 is formed in an I-beam shape.

A plurality of sliding blocks 43 and 44 are mounted on the lower surface and the upper surface of the intermediate fork 42, and the intermediate fork 42 is designed so that the sliding block 43 on the lower surface slides along the guide rail 38. It is mounted on the frame 37.

A vertically extending rotary shaft 45 is pivotally supported at an intermediate portion of the intermediate fork 42 in the front-rear direction.
5, the pinion 4 is engaged with the rack 39 described above.
6 is fitted.

Further, the moving block 40b of the rodless cylinder 40 described above is connected to the bracket 42a provided at the base end portion of the intermediate fork 42, and the moving block 40b is connected from the base end side of the cylinder 40a. When moving toward the tip side, the intermediate fork 42 projects toward the front side of the frame 37, and the moving block 40b moves into the cylinder 40a.
The intermediate fork 42 is housed above the frame 37 when it moves from the front end side to the base end side.

The tip fork 47 is formed in the shape of a groove member having an open bottom.

A pair of guide rails 48 extending over substantially the entire length of the tip fork 47 is provided on the lower surface of the tip fork 47, and the tip fork 47 slides on the upper surface of the intermediate fork 42 along the guide rail 48. A block 44 is slidably mounted on the intermediate fork 42.

On one side of the tip fork 47, a rack 49 extending over substantially the entire length of the tip fork 47 meshes with the pinion 46 and is rack 39.
When the pinion 46 that meshes with the rack 39 rotates when the rod-less cylinder 40 pushes the intermediate fork 42 forward of the frame 37, the rack 49 is fed by the rotation of the pinion 46. As a result, the tip fork 47 protrudes toward the front side of the intermediate fork 42, and when the rodless cylinder 40 rotates the pinion 46 that meshes with the rack 39 when the intermediate fork 42 is stored above the frame 37, the pinion 46 moves. The rotation causes the rack 49 to be pulled back so that the tip fork 47 is housed above the intermediate fork 42.

A guide rail 50 extending over substantially the entire length of the tip fork 47 is mounted on the upper surface of the tip fork 47 via a bracket 51.

The slide plate 52 is formed in a flat plate shape.

A plurality of sliding blocks 53 are mounted on the lower surface of the slide plate 52 via brackets 54. The slide plate 52 has a sliding block 53.
Is mounted on the tip fork 47 so as to slide along the guide rail 50.

Slide plate 52 and tip fork 47
And a rodless cylinder 5 for moving the slide plate 52 in the front-back direction of the tip fork 47.
5 are provided.

The mounting structure of the rodless cylinder 55, the tip fork 47 and the slide plate 52 is substantially the same as the mounting structure of the rodless cylinder 40, the frame 37 and the intermediate fork 42 described above.
When fluid pressure is applied to one fluid chamber of the rodless cylinder 55 and the other fluid chamber is released to the atmosphere, the slide plate 52 advances toward the tip of the tip fork 47 as the piston moves, and the rodless cylinder 55 When the fluid pressure is applied to the other fluid chamber and the one fluid chamber is released to the atmosphere, the slide plate 52 retracts toward the base end portion of the tip fork 47 as the piston moves.

The arrangement of the above-mentioned nut stocker 3, chuck unit 17, chuck reversing unit 28, and fork unit 36 will be described with reference to FIGS. 1 to 3.

As described above, the fork unit 36 is fixed to the platform 56 of the segment assembling machine substantially horizontally.

The nut stocker 3 is the fork unit 3
It is fixed to the platform 56 so as to be located on the side of the base end portion of 6.

In the chuck reversing unit 28 equipped with the chuck unit 17, the base plate 31 is mounted and fixed to the slide plate 52 of the fork unit 36, and the tip fork 47 and the intermediate fork 42 of the fork unit 36 are connected to the intermediate fork 42 and the frame. With the slide plate 52 positioned near the base end portion of 37 and the slide plate 52 positioned near the base end portion of the tip fork 47, the nut holder 12 of the nut stocker 3 is erected in a substantially vertical state and the chuck unit 17 is set horizontally. When the chuck unit 17 is rotated to the position and is positioned to the side of the tilting rotary actuator 29, the nut holder 12
And the chuck unit 17 are positioned coaxially.

The operation of the nut supply device shown in FIGS. 1 to 17 will be described below.

When supplying the nut 2 to the segment fastening device, a plurality of nuts 2 are inserted into the respective nut guides 4 with the nut lift bracket 8 of the nut stocker 3 shown in FIGS. 4 to 7 being lowered. To do.

Further, the tip fork 47 and the intermediate fork 42 of the fork unit 36 are located closer to the base end portions of the intermediate fork 42 and the frame 37, and the slide plate 52 is located closer to the base end portion of the tip fork 47. The unit 17 is rotated to a horizontal position and the chuck unit 17 is tilted by a rotary actuator 29.
Be located to the side of.

Next, the nut holder 12 of the nut stocker 3 is rotated in a substantially horizontal state to position the nut holder 12 directly above the nut guide 4, and the nut lift bracket 8 is raised, whereby the nut is lifted. Of the nuts 2 fitted onto the guide 4, the nuts located on the uppermost side are attracted to the nut holder 12.

When the nut holder 12 is erected substantially vertically, the nut 2 is taken out from the nut guide 4 and the nut 2 faces the chuck unit 17.

When the nut 2 faces the chuck unit 17, a pair of jaws 21 close to each other are moved forward to insert the tips of the jaws 21 into the hollow portion of the nut 2 so that the jaws 21 are separated from each other. The nut 2 is supported by separating it.

Further, by retracting the jaw 21 supporting the nut 2, the nut 2 is taken out from the nut holder 12.

In this state, the chuck unit 17 is positioned above the tilting rotary actuator 29, and the tip fork 47 of the fork unit 36 and the intermediate fork 4 are moved.
2 is moved toward the tip of the intermediate fork 42 and the frame 37, and the slide plate 52 is moved toward the tip of the tip fork 47, and the nut 2 is conveyed to the vicinity of the segment fastening device.
The socket holder 25 is brought into contact with a nut holder (not shown) of the segment fastening device to supply the nut 2 to the segment fastening device.

When the nut 2 is supplied to the segment fastening device, the tip fork 47 and the intermediate fork 42 of the fork unit 36 are moved toward the intermediate fork 42 and the base end of the frame 37, and the slide plate 5 is moved.
2 is moved toward the base end portion of the tip fork 47, and then the nut 2 for the segment fastening device is attached by the procedure described above.
Supply.

As described above, in the nut supply device shown in FIGS. 1 to 17, the nut 2 taken out from the nut stocker 3 is supported by the chuck unit 17, and the chuck unit 17 and the chuck reversing unit 28 are supported.
Is moved to the vicinity of the segment fastening device by the fork unit 36, so that the nut 2 can be reliably and automatically supplied to the segment fastening device within a short time.

If a nut waste box with an open top is installed at the front-rear intermediate portion of the fork unit 36,
The chuck unit 17 corresponding to the nut waste box
After positioning, the chuck reversing unit 28 causes the chuck unit 17 to face downward and the pair of jaws 21 to approach each other, whereby the nut 2 having a defective shape can be recovered.

The nut feeding device of the present invention is not limited to the above-mentioned embodiment, and it goes without saying that various modifications can be made without departing from the scope of the present invention.

[0095]

As described above, according to the nut feeding device of the present invention, the nut taken out from the nut stocker is supported by the chuck unit, and the chuck unit and the chuck reversing unit of the segment fastening device are supported by the fork unit. Since it is moved to the vicinity, the nut can be supplied to the segment fastening device reliably and automatically within a short time, which is an excellent effect.

[Brief description of drawings]

FIG. 1 is a side view showing an example of an embodiment of a nut supply device of the present invention.

FIG. 2 is a view taken in the direction of arrows II-II in FIG.

FIG. 3 is a view taken in the direction of arrows III-III in FIG. 1;

FIG. 4 is a side view of a nut stocker applied to an example of the embodiment of the nut supply device of the present invention.

FIG. 5 is a view taken in the direction of arrows VV in FIG. 4;

FIG. 6 is a view taken in the direction of arrows VI-VI in FIG. 4;

FIG. 7 is a partially cut side view showing a state in which the jaw is stored in the chuck unit applied to the example of the embodiment of the nut supply device of the present invention.

8 is a partially cut side view showing a state in which the jaws project and are close to each other in the chuck unit shown in FIG.

9 is a partially cut side view showing a state in which the jaws project and are separated from each other in the chuck unit shown in FIG. 7.

FIG. 10 is a view taken in the direction of arrows XX in FIG. 7;

FIG. 11 is a view as viewed in the direction of arrows XI-XI in FIG. 9;

FIG. 12 is a side view showing a state in which the chuck unit is rotated to a horizontal position in the nut reversing unit applied to the example of the embodiment of the nut supply device of the present invention.

FIG. 13 is a view on arrow XIII-XIII in FIG.

FIG. 14 is a view on arrow XIV-XIV in FIG. 12;

15 is a side view showing a state where the chuck unit is rotated to a vertical position in the nut reversing unit shown in FIG.

FIG. 16 is a side view showing a fork unit applied to an example of the embodiment of the nut supply device of the invention.

17 is a cross-sectional view of the fork unit shown in FIG.

FIG. 18 is a perspective view showing an example of a segment used in the shield construction method.

[Explanation of symbols]

 2 Nut 3 Nut stocker 17 Chuck unit 28 Chuck reversing unit 36 Fork unit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toru Goto 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Yoshiya Komura 13 Showa-cho, Minato-ku, Nagoya, Aichi Prefecture Ishikawajima Harima Heavy Industry Co., Ltd.Nagoya Plant (72) Inventor Ken Tsutsui 13 Showa-cho, Minato-ku, Nagoya, Aichi Prefecture Ishikawajima Harima Heavy Industry Co., Ltd. Heavy Industry Co., Ltd. Nagoya Factory (72) Inventor Toshio Suzuki 11-1 Kitahamacho, Chita City, Aichi Prefecture Ishikawajima Harima Heavy Industry Co., Ltd. Aichi Factory

Claims (1)

[Claims] 1. A nut stocker for storing a plurality of nuts and sequentially taking out the nuts, a chuck unit for supporting the nuts taken out from the nut stocker, a chuck reversing unit for changing the posture of the chuck unit, and A nut supply device comprising a chuck reversing unit and a fork unit for moving the chuck unit, which is provided between the nut stocker and the segment fastening device.