JP3346857B2 - Electa for shield machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an erector of a shield excavator for lining an underground mine excavated by a shield excavator. Is to improve the means of processing.

[0002]

2. Description of the Related Art As is well known, a shield excavator is an excavator that excavates a cutting face with a cutter at the front of the shield body while applying thrust to a shield body with a shield jack, and excavates an underground pit. . On the surrounding wall of the excavated underground pit,
A lining work machine called an erector is used for lining the underground pit by lining the segment and lining the underground pit with the segment, as is well known. This erector is an apparatus for performing an operation of rotating the erector body to a predetermined position while grasping the segment with the erector body, and sequentially positioning and stretching the segment along the underground tunnel wall.
In this manner, the erector performs operations such as gripping of the segments by the erector body, and thus drives actuators such as pressing jacks and the like for performing these operations, and uses power such as hydraulic pressure for driving and electricity for signals to drive. A power line such as a hydraulic pipeline or a cable for carrying is provided. This power path is formed of a flexible member at least in the vicinity of the erector body so that the erector body can be bent and stretched in accordance with the rotation operation, regardless of the position of the erector body, and the length of the power path is given a margin. I have. Therefore, depending on the rotation position of the erector body, a phenomenon occurs in which the flexible power path sags or bends and overlaps. When the erector body is rotated while the erector body is left standing, the flexible power path is shielded. There is a danger that peripheral equipment such as jacks in the body may be caught or entangled and damaged. The occurrence of such a situation can be prevented by monitoring the operator at the time of the rotation operation and performing a process to prevent the damage, but such work is not only troublesome, but also sometimes flexible due to carelessness. Sexual power lines may be damaged. On the other hand, recently, a technology for automatically preventing such a situation from occurring without manual intervention has been developed, and an erector equipped with a hose reel and a cable reel has been put to practical use.
In some cases, these devices cannot be arranged due to space restrictions. As shown in FIG. 9, a cable reel and a hose reel denoted by reference numeral 11 are installed on the inner diameter portion of the erector ring 2a, thereby providing a cable and a hydraulic hose denoted by reference numeral 6 as shown in FIG. Such a flexible power path can be wound.
FIG. 9 shows a state in which the flexible power path 6 drawn out from the cable reel or the hose reel 11 is guided by a plurality of rollers 12 (in the reference numerals in FIG. Represents the equivalent part, so the description is omitted). Such conventional erectors transmit electric power via a slip ring particularly when a cable reel is installed to handle slackness of the cable, so that a weak electric signal such as electric power of a signal cable is used. In this case, the reliability is lost when the communication is attempted, and the communication cannot be used. In addition, actual opening flat 4-12700
As described in Japanese Patent Publication No. 0, a technique has been devised in which a slack or the like of a flexible power path generated in the process of rotating the erector body is attracted to a rotating frame by a magnetic force and processed. Since the magnetic signal may adversely affect the electric signal of the signal cable, this technique cannot be used for processing the slack of the signal cable or the like, similarly to the above-described technique. As described above, the use of any of these conventional techniques is restricted by the type of the flexible power path to be used, and is not versatile. However,
Among the technologies devised conventionally, there is a technology capable of solving the above-mentioned problems, and an example thereof includes an elector described in Japanese Utility Model Publication No. 60-33199. The present invention seeks to further improve such an erector in order to make it suitable for a shield machine and put to practical use.

Therefore, the erector described in this publication is positioned as a conventional erector as a prior art of the present invention,
The technical content will be described below with reference to FIG. FIG.
Reference numeral 0 is a cross-sectional view of a main part of a shield machine equipped with a conventional example of an erector. In describing the technical contents of this conventional example, terms and reference numerals are not used as they are in this publication, and in order to clarify the correspondence with the present invention, the present invention will be described in detail as follows. It is adapted to the embodiment.

In FIG. 10, reference numeral 1 denotes a shield body which has a cutter (not shown) at the front and a rear part is propelled by a shield jack (not shown).
Ring girder which reinforces the above-mentioned erector main body, which is installed in the shield main body 1 and which is rotatably operated, 2a is an erector ring as a rotary portion of the erector main body 2, and 2b is capable of rotating this erector ring 2a A roller is supported on the inner wall of the shield body 1 by a plurality of shafts so as to support the pair of arms, 2c is a pair of arms provided on the electoring ring 2a, 2d is a pair of segment pressing jacks respectively attached to the pair of arms 2c. Reference numeral 2e denotes a pair of guide rods slidably fitted to the pair of arms 2c, respectively, and reference numeral 2f denotes a substantially U-shaped front view which is slidably supported by the pair of arms 2c via the guide rod 2e. It is a hanging beam of a shape. When viewed from the front, the arm 2c, the pressing jack 2d, and the guide rod 2e are provided in a pair, but only one side is shown in FIG. The erector includes an pressing ring 2d provided on the erector body 2 side and an erector ring 2 installed on the shield body 1 side, which is not shown, but not shown.
a rotary hydraulic motor for rotating the erector body for rotating the a. By driving the hydraulic motor, the erector body 2 normally moves the erector ring 2a to the
The lining work is performed by rotating in a desired direction within a range of a rotation angle of plus or minus half rotation (± about 200 °) by a desired rotation angle.

A description will be given of a hydraulic line which is a power line for driving and controlling devices on the erector body 2 side such as a pressing jack 2d. In the case where this hydraulic line is provided, a pair of supply and discharge lines is provided. However, FIG. 10 shows only one of the pair of conduits.
In FIG. 10, reference numeral 20 denotes a pair of pipe joints fixed to the outer periphery of the elector ring 2a, 21 denotes a pair of pipe joints fixed to the ring girder 1a, 22 denotes one end connected to the pipe joint 20, and the other end has a pressing jack. Electoring ring 2a for supplying hydraulic pressure to 2d etc. and discharging these pressure oils
A pair of steel pipelines for hydraulic supply and discharge provided along
Reference numeral 3 denotes a rubber hose or the like having one end connected to the pipe joint 20 and the other end connected to the pipe joint 21 after being inserted into the hole of the ring girder 1a and movable along the rotation of the elector ring 2a. A pair of movable flexible pipes for supplying and discharging hydraulic pressure, 24 is a drum section around which the movable flexible pipe 23 is wound when the erector body 2 is rotated, and 25 is one end connected to the pipe joint 21 and the other end is illustrated. And a pair of fixed hydraulic lines for supplying and discharging hydraulic pressure connected to a hydraulic pump not provided. The hydraulic line connecting the hydraulic pump and the pressing jack 2d is
Since the pair of pipes 22, 23, 25 are formed by connecting the pair of pipe joints 20, 21, the hydraulic pressure of the hydraulic pump is one of the pair of pipes 22, 23, 25. Through, fixed hydraulic pipeline 25, movable flexible pipeline 23, steel pipeline 2
2 and is supplied to the pressing jack 2d and the like.
The discharged oil from the pressing jack 2d and the like returns through the other of the pair of pipes 22, 23, and 25 in the reverse order, and is returned to the hydraulic pump via a tank (not shown). The movable flexible pipe 23 has one end fixed to the pipe joint 20 that moves in accordance with the rotation of the elector ring 2a and the other end fixed to the fixed pipe joint 21 as described above. Since it functions to be movable following the rotation, it is formed long enough to have a margin corresponding to the maximum rotation movement distance of the pipe joint 20. Therefore, if the intermediate portion is left as it is, the movable flexible conduit 23 has an extra length, and as described above, the movable flexible conduit 23 sags or bends and overlaps, and as a result, the movable body 23 During the rotation operation, there is a possibility that the movable flexible pipe 23 as a flexible power path may be damaged due to, for example, catching on peripheral devices in the shield body. Therefore, in this conventional apparatus, a mechanism for applying tension to the intermediate portion of the movable flexible conduit 23 is provided in order to process the surplus length.

Referring to FIG. 10, reference numeral 26 denotes an automatic stretching device which is a mechanism for applying the tension, and reference numeral 27 denotes a wire reel which is rotatably mounted on the ceiling surface of the shield body 1 in front of the erector. , 28 are the wires wound on this wire reel, 29 is this wire 2
8 is a pulley for looping the intermediate portion of the movable flexible pipe 23, and the automatic tensioning device 26 includes the wire reel 27, the wire 28, and the pulley 29. When the intermediate portion of the movable flexible conduit 23 is wrapped around the pulley 29 on the wire reel 27, the pulley 29 is drawn to take up the wire 28 so as to constantly apply tension to the movable flexible conduit 23. Tension urging means such as a mainspring and a motor for urging is provided. Since the conventional device is provided with such a configuration, when the erector body 2 is at the neutral position, the pulley 29 is shown in FIG. 10 by the wire reel 27 winding the wire 28 by its tension urging means. In this manner, the movable flexible conduit 2 having a length equivalent to 2 l is drawn in a direction away from the electoring ring 2 a by a distance l (to the left in the figure).
Absorb the extra length of 3. On the other hand, when the erector body 2 is rotated in the forward or reverse direction by a rotation angle of a half turn (approximately 200 °), which is the maximum rotation angle, the movable flexible conduit 23 has the tension. The pulley 29 is moved to the position of the pipe joint 21 against the pulling force of the applying means, and is pulled out almost as much as possible while being wound up by the drum portion 24. Thus, according to this conventional apparatus, even when the erector main body 2 is turned to any position within the turning angle range, the movable flexible pipe 23 may sag or bend and overlap. Therefore, damage to the movable flexible conduit 23 caused by this can be prevented beforehand. In addition, even when a slack of a signal cable is processed, since a slip ring for transmitting the electricity or a magnetic force for processing the slack is not used, a flexible power path to be used is used. Its use is not restricted by the type.

[0007]

SUMMARY OF THE INVENTION
The conventional erector provided with the above has excellent features not found in other conventional technologies as described above, but on the other hand, with the provision of the automatic stretching device 26, the shield main body 1 having a long machine length is required. Therefore, a new problem which can be fatal in practical use arises. That is, in the shield excavator, in order to change the excavation direction and smoothly bend the excavation direction, and also to reduce the frictional resistance between the shield body 1 and the ground during excavation and smoothly excavate, Although it is basically necessary to reduce the length of the shield body 1 as much as possible, in the conventional erector, the provision of the automatic stretching device 26 satisfies such basic requirements. You will not be able to do it.

[0008] In this regard, the automatic tensioning device 26 provided in the conventional erector, when the erector main body 2 is in the neutral position, has the pulley 29 as described above.
Is pulled in the direction away from the erector ring 2a by a distance l so as to absorb the excess length of the movable flexible conduit 23 corresponding to a length of 2l. To enable this, the shield body 1 must have a length at least equal to the travel distance l of the pulley 29 plus a distance l 'corresponding to the space required for installing the wire reel 27. Will be. Then, when the diameter of the drum portion 24 is D and the pi is π, the moving distance 1 of the pulley 29 is obtained.
Can be obtained as follows.

2l = πD × 200 ° (maximum rotation angle of the erector body 2) / 360 ° {1 = πD × 5/18 = 0.87D} (1) Now, assuming a medium-sized shield machine, and assuming that the diameter D of the drum portion 24 of the erector body 2 is, for example, 3 m, the moving distance 1 of the pulley 29 is about 2.6 m from the formula (1). Then, in addition to the distance of about 2.6 m, a distance l ′ corresponding to a space necessary for installing the wire reel 27 is provided.
Considering that the shield body 1 is necessary,
It is necessary to design the length to be about 3 m, which is about 1 m longer than that of a conventional shield machine. As described above, the conventional erector is not only difficult to install on a normal shield excavator, but if it is to be installed, the length of the shield body 1 is considerably longer than that of a normal one. Inevitably, the excavation function, which is a basic function of the shield excavator, is impaired.

In addition to such a problem, in the conventional erector, since the position where the wire reel 27 is installed is in front of the shield body 1, the wire reel 27 is installed on the shield body 1 having a machine length enough to install the wire reel 27. Even so, there are various restrictions. That is, in front of the shield body 1, many devices such as a shield jack and a cutter drive motor are installed so that there is no stepping stone.
A pulley 29 is provided together with the wire reel 27,
In addition, when the cable 8 is extended, not only does a problem arise in maintenance, but also the installation location itself is restricted. In addition, the installation of such conventional erectors in a mid-fold shielded tunneling machine, which is increasingly in demand recently,
It is very difficult because the shield body 1 is divided so that it can be folded in the middle and is substantially shortened, and the installation place is further restricted by the addition of the middle-bending jack.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems in the conventional erectors, and is intended to improve the problem. It has the same features as the conventional erector that the use is not restricted by the type of road, it can be installed even if the length of the shield body is shortened, and it can be used for any type of shield excavator An object of the present invention is to provide a versatile shield excavator erector that can be easily installed without restrictions.

[0012]

SUMMARY OF THE INVENTION An object of the present invention is to provide a rotary-operated erector body having an actuator for performing lining work by driving the actuator, and a power for driving and controlling the actuator. , One end of which is connected to the erector body side so as to move in accordance with the turning operation of the erector body and the other end is fixed so as not to move, and has a length that can follow the turning operation. In an erector of a shield machine equipped with a flexible power path, a fixed frame body around which the flexible power path can be wound, and a flexible frame when the erector body is rotated in one direction from a neutral position. A roller around which an intermediate portion of the power path is wound and which can move with the movement of the flexible power path; and at the time of the movement, the roller can move around the fixed frame by a predetermined range. A guide to guide body provided with facilities to a tension applying means for applying a tensioning force through the rollers to flexible power path when the intermediate portion of the flexible power path is wound into a roller, this Tension giving hand
So that the step moves on the guide body along its guide direction
Mounted via a spring, the roller moves on a flexible power path
When moving along with the
And a slider for transmitting the spring force to the shaft. "

[0013]

Since the erector of the shield machine according to the present invention has such a structure, the erector main body is rotated in one direction from the neutral position so that the end of the flexible power path on the erector main body side. Part by a slider as a tension applying means
When the roller moves in a direction opposing the tension generated by the transmitted spring force , the roller slides around the fixed frame with the movement of the intermediate portion of the flexible power path.
It moves while being applied with tension while engaging with the iron . As a result, since the flexible power path is wound around the fixed frame, the erector main body can be rotated by a required rotation angle. In such a state, when the erector body is rotated in the reverse direction to return the erector body to the neutral position, and the end of the flexible power path on the erector body side is returned to the reference position, the flexible power path becomes flexible. the length of the surplus generated in the power path, the excess length, Sly as tension imparting means
Since the tension given by the spring force is applied and absorbed by the roller through the roller, the peripheral device does not get caught or entangled. Also, when the erector body is rotated from the neutral position in the other direction to move the end of the flexible power path on the erector body side, the flexible power path is wound around the roller. As the path moves along with the movement, the path moves to a state where the path is separated from the rollers 5 and is wound around the fixed frame while being guided by the rollers. Is possible. In such a state, when the erector main body is rotated in the reverse direction so as to return to the neutral position, and the end of the flexible power path on the erector main body side is returned to the reference position, the fixed frame body is moved. As the flexible power path in the state of being wound around is moved away from the fixed frame and moved to a state of being wound around the rollers with its movement, and the excess length is absorbed, It does not get caught or tangled by peripheral devices.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a sectional view taken along line II of FIG. 6 showing a main part of an erector of a shield machine according to an embodiment of the present invention.
FIG. 3 is a sectional view taken along line III-III of FIG. 2, FIG. 4 is a sectional view taken along line IV-IV of FIG. 2, and FIG. FIG. 6 is a view similar to FIG. 3 showing a state in which the shield excavator is rotated by 200 °, and FIG. 7 is a sectional view taken along line VII-VII of FIG. 6, and FIG. 8 is a sectional view taken along line VIII-VIII of FIG. FIG.
In FIG. 8 to FIG. 8, the parts denoted by the same reference numerals as those in FIG. 10 indicate the same parts as those in FIG.

First, an overall image of an erector of a shield machine according to an embodiment of the present invention will be described with reference to FIGS. 6 to 8. Although the erector is shown only schematically in FIGS. 6 to 8, FIG. As in the case of the conventional erector, "a pressing jack provided on the erector main body 2 side and an unillustrated hydraulic motor for rotating the erector main body mounted on the shield main body 1 side and the like are used to perform lining work by driving these. The erector body 2 to be rotated and one end is connected to the erector body 2 side so as to move according to the rotation operation of the erector body 2 and the other end is fixed so as not to move, and the rotation operation is performed. And a flexible power path having a length sufficient to follow the above. The erector of the shield machine according to the present embodiment has the same configuration as the erector of the related art described above.
The fixed frame 3 is provided without providing such a structure. That is, the fixed frame 3 is attached to the work floor 1a provided so as to protrude rearward (tail portion) from the shield body 1 through the inner diameter portion of the erector ring 2a. At a position corresponding to the upper part of the fixed frame 3, a beam 2h is directed from the rear end of the erector body 2 toward the same position.
Are formed to form a rotation-side fixed end 2g for fixing the end of the cable conveyor 10 to the rotation-side erector 1 body side. 2 g of this rotating side fixed end
Is formed integrally with the erector main body 2 and forms an end on the rotation side, so that when the erector main body 2 is turned left and right from the neutral position, it turns left and right in accordance with this turning operation. . The cable conveyor 10 is similar to a cable conveyor well-known in machine tools and the like. The cable conveyor 10 accommodates an intermediate portion of a flexible power path 6 such as a cable or a hose, and both ends thereof are pulled out to provide a flexible power path. Works to guide 6. The cable conveyor 10 has one end on the rotation-side fixed end 2g and the other end on the fixed frame 3 as described later.
Both ends of the flexible power path 6 fixed to the side and pulled out from the cable conveyor 10 are respectively fastened with clamp materials. The rotating-side fixed end 2g side of the flexible power path 6 pulled out from the cable conveyor 10 is connected to electric equipment such as control equipment in the erector body 2 if it is a cable, and hydraulic equipment such as an actuator if it is a hose. You. The fixed frame 3 side of the flexible power path 6 is connected to a control panel if a cable, or to a hydraulic pump as a hydraulic source if a hose. The erector of the shield machine according to this embodiment forms a mechanism for applying a tension to the flexible power path 6 as shown in FIGS. 1 to 5 based on the above configuration. The mechanism has the greatest feature of this embodiment.

The mechanism will be described in detail with reference to FIGS. 1 to 5. Reference numeral 3 denotes an annular groove formed by side plates 3a and 3b and a bottom plate 3c on an outer peripheral portion. A ring-shaped fixing frame around which 6 can be wound,
Reference numeral 4 denotes a ring-shaped fixed frame 3 provided on each of the tops of the side plates 3a and 3b over substantially a half circumference along the annular groove, and guides the roller 5 so that the roller 5 described below can move around the fixed frame 3 by about 90 °. The pair of guide bodies 5 has a roller body for winding the flexible power path 6, and the pair of guide bodies 4
The roller 7 mounted so as to be able to move around the fixed frame 3 in a predetermined range while being guided by the roller 5 is mounted in the guide body 4 via a tension spring 8 so as to slide along the guide direction. A slider that transfers spring force to the roller 5 by engaging with and moving when moving upward. The mechanism of the present embodiment is roughly divided into
The fixed frame 3, the pair of guides 4, the rollers 5, and the slider 7 are provided. As can be seen from FIG. 1, the fixed frame 3 is formed by cutting one portion of the bottom plate 3c in a U-shape and bending the notched piece inward to form the flexible power path 6.
The other end of the cable conveyor 10 is guided from the outlet 3d along the notch and fixed by the fixing portion 3e on the notch. As is well represented in FIG. 4, each pair of guides 4
The fixed frame side plates 3a, 3 have a rectangular frame having a rectangular cross section including the side plates 4a, 4b, the bottom plate 4c, and the upper plate 4d, and have an interval of B 'slightly larger than the width B of the roller body of the roller 5.
b is attached parallel to the outside of each top. In this embodiment, when the guide body 4 is provided on the fixed frame 3 in this embodiment, the guide body 4 is provided over substantially the left half of the ring-shaped fixed frame 3 as shown in FIG. A roller 5 is fixed to each side plate 4b of the pair of guides 4 by a fixed frame 3.
1 is formed in the range from the lower toe X to the upper toe Y in FIG. 1, that is, in the range of about 90 ° to the upper left. 3, the bottom plate 4c and the top plate 4d of each guide body 4 are formed in an arc shape concentric with the ring-shaped fixed frame 3, and the bottom surface of each bottom plate 4c has a lower end. A bracket 4g is attached to the portion, and a stopper 4f is attached slightly above the lower end X of the guide slot 4e. As shown in FIG. 4, the roller 5 includes a roller body having an annular groove formed on an outer peripheral portion formed by a rim 5 b slightly wider than the cable conveyor 10 and guide flanges 5 c provided at both ends thereof. A shaft 5a fixed to the roller body, and bearings 5d attached to both ends of the shaft 5a. Both ends of the shaft 5a are inserted into the guide slots 4e of the guides 4 so that the bearings 5d at both ends are accommodated in the pair of guides 4. As a result, the roller body is interposed between the pair of guides 4 and disposed such that the outer peripheral portion is located in the annular groove of the fixed frame 3. 2 to 4, the slider 7 has a rectangular base plate 7a having a curvature substantially equal to that of the bottom plate 4c of the guide body, and has four vertically extending corners on the inner diameter side of the base plate 7a. The lower roller 7b ₁ protruding rotatably,
And 7b _2, and a horizontal roller 7c which projects rotatably sideways at the four corners of the base plate 7a, a stopper 7d mounted on the radially outer side above the base plate 7a, bracket 7e attached to the lower end of the base plate 7a Consists of The slider 7 is mounted to slidably guide body 4 to slide the bottom plate on the guide body under roller 7b _1, 7b _2. As this case, while stretched the spring 8 tension between the bracket 4g and the bracket 7e in a state in which engaging the lower roller 7b ₁ the stopper 4f of the guide body 4, with the upward movement of the roller 5 Bearing 5d to stopper 7d
And can be slid upward with the roller 5. The cable conveyor 10 is shown in FIG.
As shown in (1), one end is fixed to the rotation-side fixed end 2g, and the intermediate portion is introduced into the annular groove of the roller body of the roller 5 and folded back in a state of being wound around, and is also introduced into the environmental groove of the fixed frame 3. While being wound around the bottom plate 3c of the fixed frame 3, it is guided to the outlet 3d, and the other end is fixed to the fixed portion 3 of the fixed frame 3.
e. In FIG. 1, O denotes a rotation-side fixed end 2g.
A reference position, which is a neutral position where is not turned,
Is a right turn 200 ° position which is a limit position when turning the rotation side fixed end 2g rightward, and L is a left turn 200 ° which is a limit position when turning the rotation side fixed end 2g leftward. Indicates the position.

Since the erector of this embodiment has such a structure, the erector main body 2 is set at the neutral position in an unoperated state, and the rotation-side fixed end 2g is moved to the reference position O in FIG.
As shown in FIG. 3, the roller 5 is stationary because the shaft 5a is locked at the lower toe X of the elongated hole 4e of the guide body 4, and the slider 7 is roller 7b ₁ is stationary because it is engaged with the stopper 4f of the guide body 4. In this state, the roller 5
Bearing 5d contacts the base plate 7a of the slider 7,
At the same time, the slider 7 is located below and separated from the stopper 7d of the slider 7, and the slider 7 is pulled downward by the tension spring 8 with a slight force. Also,
The cable conveyor 10 whose intermediate portion is wound around the roller 5 is separated from the roller 5 and is in a hanging state. As described above, when the rotation-side fixed end 2g is at the reference position O, the length 2l (= 0.8
7D × 2 = 1.74D) equivalent cable conveyor 10
It is necessary to absorb the surplus length of somewhere. However, in the erector of this embodiment, the distance from the rotation-side fixed end 2g to the fixed portion 3e of the fixed frame 3 via the roller 5 is smaller. Designed to absorb

In such a state, when the erector body 2 is now rotated in the left-hand rotation direction, ie, counterclockwise, the rotation-side fixed end 2g also turns in the same direction, and the intermediate portion is wound around the roller 5. The cable conveyor 10 is adapted to be separated from the rollers 5 as the turn progresses, and guided by the rollers 5 while the bottom plate 3 of the fixed frame 3 is being guided.
The state shifts to a state in which it is wound around the left side of c. As is apparent from FIG. 1, the cable conveyor 10 is gradually wound around the left side of the bottom plate 3c, and the turning side fixed end 2g is the left turn 200 at the limit position of the left turn.
When it turns to the position L, as shown by the L side chain line in FIG. 1, it is completely wound around the left half circumference of the fixed frame 3, and at the same time, the erector body 1 is stopped by the turning limit switch (not shown). . In such a state, when the erector body 2 is rotated clockwise to return to the neutral position, the rotation-side fixed end 2g also turns in the same direction, and is wound around the fixed frame 3. 10 is a bottom plate 3 of the fixed frame 3 as the turning progresses.
c, the state smoothly shifts to a state where the roller 5 is wound around the roller 5, and when it turns to the reference position O, it returns to the state shown by the solid line in FIG. During the above operation, the roller 5 and the slider 7 are of course still stationary, and the cable conveyor 10 is
Does not receive the pulling force of the spring 8, but when the cable conveyor 10 separates from the fixed frame 3, the cable conveyor 10 is guided by the guide flange 5 c of the roller 5 while being guided by the fixed frame side plates 3 a and 3 b, and Because it is wrapped around, it does not get caught or entangled with peripheral devices.

As described above, when the erector body 2 is further rotated clockwise or clockwise from the state where the erector body 2 is returned to the neutral position, the cable conveyor 10 hanging down around the roller 5 is As can be seen with reference to FIG. 3, the roller 5 is immediately brought up close, so that the bearing 5
d is also pulled up and engages with the stopper 7d of the slider 7. Then, when the turning is continued, the cable conveyor 10 is moved to the right side by the turning, so that the bearing 5d and the stopper 7d are kept in the engaged state by the tension force of the extension spring 8 in this state. Pull together to resist. In that case, the roller 5
When the shaft 5a is guided by the long hole 4e of the guide body 4, the shaft 5a moves along the ring-shaped annular groove of the fixed frame body 3 without coming off the stopper. The slider 7 is guided by the lower rollers 7b ₁ and 7b ₂ by sliding on the bottom plate 4c of the guide body 4 without any resistance, and is also guided by the horizontal roller 7c.
By the function of, the guide is smoothly guided by the side plates 4a and 4b.
In this manner, when the roller 5 moves from the lower toe X to the upper toe Y of the elongated hole 4e along the ring-shaped annular groove of the fixed frame 3, as shown in FIG. Is wound around the right side of the bottom plate 3c of the fixed frame 3 soon. Then, when the turning-side fixed end 2g turns to the right turning 200 ° position R, which is the limit position of the right turning,
The erector body 2 is stopped by a turning limit switch (not shown). At this time, the roller 5 stops just before the upper toe Y as shown in FIG.
The fixed frame 3 is wound around the right half circumference. In this state, the cable conveyor 10 is wrapped around the fixed frame 3 while being wrapped around the rollers 5, unlike the above-described case in which the erector main body 2 is rotated in the left rotation direction, as is apparent from FIG. 5. It is in the state where it was. Looking at the force acting on the cable conveyor 10 while the roller 5 is being lifted from the lower toe X to the upper toe Y, if the roller 5 is to be pulled up at the lower toe X, the roller 5 When the roller 5 is about to be pulled up to the upper toe Y, the minimum component force of the roller 5 and the maximum tension of the spring 8 are exerted on the cable conveyor 10 due to the total weight of the spring 8 and the slight tension of the spring 8. Force acts on the cable conveyor 10. Therefore, while the erector body 2 is rotated from the neutral position to the right rotation direction, unlike the other cases, the spring 8 receives a pulling force in a direction opposite to the rotation direction. The operating force required to rotate the main body 2 can be considered to be substantially equal in all the operation steps, and the operating force does not greatly fluctuate.

In such a state, the erector body 2
If you rotate left to return to the neutral position,
The rotation-side fixed end 2g also turns in the same direction, and the cable conveyor 10 in a state of being wound around the fixed frame 3 keeps being wound around the roller 5 as the turn progresses, and the bottom plate of the fixed frame 3 Depart from 3c. When the turning side fixed end 2g is turned from the right turning 200 ° position R to the reference position O in this manner, the state returns to the state shown by the solid line in FIG. Meanwhile, the roller 5 moves along the annular groove of the fixed frame 3 from the vicinity of the upper toe Y in the direction of the lower toe X while being guided by the elongated hole 4 e of the guide body 4. When the roller 5 moves near the lower toe X in this manner, the slider 7
Is lower rollers 7b ₁ of the guide member 4 the stopper 4f
When the roller 5 is further moved to the lower toe X, the shaft 5a of the roller 5 itself is also
It is stopped by the lower edge. As a result, the roller 5
Since the tension cannot be applied to the cable conveyor 10, the cable conveyor 10 is in a state where the intermediate portion is wound around the roller 5 when the turning-side fixed end 2 g is turned to the reference position O. It will fall away from the roller 5. The state of the roller 5, the slider 7, and the cable conveyor 10 when the turning-side fixed end 2g is turned to the reference position O through such a process is as shown in FIG. In the process of moving in the range from the upper toe Y to the lower toe X, the roller 5 moves so as to be pulled down via the stopper 7d of the slider 7 by its own weight or the pulling force of the tension spring 8, The cable conveyor 10 has a roller 5
Is constantly leaned to the left while being applied with tension, without being caught or tangled by peripheral devices. As is apparent from the above description, the tension is substantially uniform during the entire operation of the erector main body 2, and the tension does not greatly change, and the erector main body 2 is rotated. The same is true for the operating force required for.

Therefore, according to the present embodiment, the surplus length of the flexible power path 6 is always absorbed even when the erector body 2 is turned to any position within the turning angle range. In addition, the power path 6 does not sag or bend, and does not overlap, thereby preventing damage to the flexible power path 6 caused by this. In this case, in the present embodiment, the excess length of the flexible power path 6 is absorbed in the cross-sectional direction of the erector main body 2, and the pulley 29 is separated from the erector ring 2a as in the conventional erector. Since it does not pull in the direction of separation and absorb the excess length, it can be installed even if the length of the shield body is shortened, and there are special restrictions on any type of shield excavator Without receiving
It can be easily installed. Further, even when a signal cable is used as the flexible power path 6, since a signal such as a slip ring for transmitting the electric power or a magnetic force for processing the slack is not used at all, weak electric power is used. Signals can be transmitted reliably, and their use is not restricted by the type of flexible power path used. In addition to these effects, according to the present embodiment, the fixed frame 3 has a substantially complete hollow portion, and there is almost no obstacle inside the fixed frame 3, so that the earth pressure shield excavator has When a soil removal device such as a screw conveyor or a mud-type shield excavator's sending / discharging pipe is installed in the shield main body 1, the soil removal device can be installed by directly inserting it into the hollow portion, and there are no restrictions. It can be easily installed without receiving it. Further, the operating force required to rotate the erector main body 2 and the tension applied to the cable conveyor 10 are substantially equal during the entire operation of the erector main body 2 in each direction of the rotation operation, and large fluctuations occur. Therefore, stable operation and processing of the erector body 2 and the cable conveyor 10 can be performed.

In the present embodiment, the intermediate portion of the flexible power path 6 is accommodated in the cable conveyor 10, but such an arrangement is omitted, and the flexible power path 6 is directly wound around the roller 5. It can also be installed in this way.

[0023]

As is apparent from the above description, the present invention relates to a structure described in the claims, and more particularly, to a structure in which a fixed frame body around which a flexible power path can be wound and a erector body are neutralized. A roller that is wound around an intermediate portion of the flexible power path when rotated in one direction from the position, and that can move with the movement of the flexible power path; And a guide body for guiding the flexible power path around the fixed frame so that the flexible power path is wound around the roller when the flexible power path is wound around the roller. with facilities to the tension imparting means for imparting, the tension imparting means, the guide body
To move along the guide direction.
Rollers move as the flexible power path moves.
When the roller moves, it engages with the roller and applies spring force to the roller.
The extra length of the flexible power path is always absorbed even when the erector body is turned to any position within its turning angle range because the slider is configured to transmit the power. As a result, the flexible power path does not sag or bend and overlap, and the damage can be reliably prevented. In this case, the excess length of the flexible power path is absorbed in the cross-sectional direction of the erector body, and the pulley is pulled in the direction away from the erector ring and the excess length is pulled, as in the conventional erector. The shield body is not absorbed, so it can be installed even if the length of the shield body is shortened, and it can be easily installed on any type of shield excavator without any special restrictions Can be. Further, even when a cable is used as the flexible power path, since a weak electric signal can be transmitted without fail, the use of the flexible power path is not restricted by the type of the flexible power path used. It is possible to obtain a reliable shield excavator erector.

[Brief description of the drawings]

FIG. 1 is a sectional view taken along line II of FIG. 6 showing a main part of an erector of a shield machine according to an embodiment of the present invention.

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

FIG. 3 is a sectional view taken along line III-III in FIG. 2;

FIG. 4 is a sectional view taken along line IV-IV of FIG. 2;

FIG. 5 is a view similar to FIG. 3, but showing a state in which the erector main body is rotated clockwise by about 200 °.

FIG. 6 is a partially cutaway side view schematically showing an entire image of the shield machine according to the embodiment of the present invention, omitting details of an erector.

FIG. 7 is a sectional view taken along line VII-VII of FIG. 6;

8 is a sectional view taken along line VIII-VIII in FIG.

FIG. 9 is a cross-sectional view of an erector of a shield machine previously used in practice.

FIG. 10 is a sectional view of a main part of a shield machine equipped with an erector of a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Shield main body 2 Electa main body 2a Electring 2d Pressing jack 2g Rotation side fixed end 3 Fixed frame 3d Flexible power path outlet 3e Fixed part 4 Guide 4e Guide long hole 4f Stopper 5 Roller 5a Shaft 5b Rim 5c guide flanges 5d bearing 6 flexible power path 7 slider 7b _1, 7b ₂ lower roller 7c horizontal roller 7d stopper 8 a tension spring 10 cable conveyor

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 4-134599 (JP, U) JP-A 4-17000 (JP, U) JP-A 5-77399 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) E21D 11/40

Claims (1)

(57) [Claims] 1. An erector main body having an actuator, which is rotatably operated to perform lining work by driving the actuator, and a power path for carrying motive power for driving and controlling the actuator, and one end of the erector main body is operated to rotate the erector main body. Of a shield machine with a flexible power path that is connected to the erector body side so as to move in accordance with A flexible frame that can be wound around a flexible power path, and a flexible power path that is wound around an intermediate portion of the flexible power path when the erector body is rotated in one direction from a neutral position. A roller that can move along with the movement of the road, and a guide body that guides the roller so that it can move around the fixed frame in a predetermined range during the movement are provided. The inter together with facilities to a tension applying means for applying a tensioning force through the rollers to flexible power path when it is wound into a roller, the tension
The applying means moves to the guide body along the guide direction.
Is mounted via a spring so that the roller has a flexible power path
Engage with the roller when moving with the movement of
And transmit the spring force to the roller
Elekta of the shield machine, characterized in that it was.