JPH07158396A - Erector for shield machine - Google Patents

Abstract

PURPOSE:To prevent damage by wrapping a cable supplying power etc., to a turning erector through a movable roller, at the same time, providing tensile force on the roller, and removing the slack of the cable caused in the case of turning. CONSTITUTION:Segments are mounted to an excavated tunnel, and a flexible cable 6 supplying power etc., is provided to a turnable erector 2 through a cable conveyor 10. The conveyor 10 is wrapped around a movable roller 5 along a guide body 4 and, at the same time, tensile force is so provided to the roller that there is no slack in the conveyor 10. The provision of the tensile force is made by the self-weight of the roller 5 or an energized spring. Even if the erector 2 is turned in any direction, the surplus length of the cable 6 is always removed, and there is no slack in the cable. According to the constitution, the folding or damage of the cable can be prevented.

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 machine for lining an underground pit excavated by a shield machine, which is slack in a flexible power path generated when the erector body is rotated. To improve the means of handling.

[0002]

2. Description of the Related Art As is well known, a shield excavator is an excavator that excavates a face with a cutter at the front of the shield body while applying thrust to the shield body, and excavates an underground pit. . On the peripheral wall of the underground mine where the excavation proceeded,
As is well known, a lining work machine called an erector is used for lining an underground mine by lining a segment and lining the underground mine. This erector is a device for performing a work of rotating the erector body to a predetermined position while gripping the segment by the erector body and sequentially positioning and stretching the segment along the peripheral wall of the underground pit.
In this way, since the erector performs operations such as gripping a segment by the erector body, power such as driving hydraulic pressure and signal electricity that drives and controls actuators such as pressing jacks that perform these operations is performed. Power lines such as hydraulic lines and cables for carrying are 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 rotating action no matter where the erector body is rotated. There is. Therefore, depending on the rotating position of the erector body, a phenomenon occurs in which the flexible power path sags or bends and overlaps. If the erector body is rotated while leaving it, the flexible power path is shielded. Peripheral devices such as jacks inside the main unit may be caught or entangled and damaged. Occurrence of such a situation can be prevented by a worker monitoring the rotation operation and performing a process for preventing the damage, but such a work is not only troublesome but sometimes inadvertently flexed. It may also damage the sexual power line. On the other hand, recently, a technique for automatically preventing the occurrence of such a situation without human intervention has been developed, and an erector equipped with a hose reel and a cable reel has been put into practical use.
In some cases, these devices cannot be placed due to space restrictions. As shown in FIG. 9, this conventional erector is provided with a cable reel and a hose reel indicated by reference numeral 11 in the inner diameter portion of the erector ring 2a, whereby a cable and a hydraulic hose indicated by reference numeral 6 are installed. A flexible power path such as the one described above can be wound up.
FIG. 9 shows a state in which the flexible power path 6 fed from the cable reel or the hose reel 11 is guided by a plurality of rollers 12 (in the reference numerals of the drawing, the same reference numerals as those in other drawings described later are given. Represents the equivalent part, so the description is omitted). Since such a conventional erector transmits electricity through a slip ring especially when a cable reel is installed to handle slack of a cable, a weak electric signal such as electricity of a signal cable is used. When trying to communicate, it becomes unreliable and unusable. Also, the actual Kaihei 4-12700
As described in Japanese Patent No. 0, a technique has been devised in which a slack of a flexible power path generated in the process of rotating an erector body is attracted to a rotating frame by magnetic force and processed. Since there is a danger that the magnetic force may adversely affect the electric signal of the signal cable, this technique cannot be used for processing such as sagging of the signal cable, as in the above technique. As described above, all of these conventional techniques are not versatile because their use is restricted by the type of flexible power path used. However,
Among the techniques that have been conventionally devised, there is a technique that can solve the above problems, and an example thereof is an erector described in Japanese Utility Model Publication No. 60-33199. The present invention intends to further improve such an erector in order to make it suitable for a shield machine and put it to practical use.

Therefore, by positioning the erector described in this publication as a conventional erector as a prior art of the present invention,
The technical contents will be described below with reference to FIG. Figure 1
FIG. 0 is a cross-sectional view of a main part of a shield machine having the conventional erector. In describing the technical contents of this conventional example, the terms and reference numerals are not used as they are in this publication, but the present invention described later will be described as much as possible so that the correspondence with the present invention is clear. It is adapted to the embodiment.

In FIG. 10, reference numeral 1 is a shield body having a cutter (not shown) at the front portion thereof, and a rear portion thereof is propelled by a shield jack (not shown), and 1a is this shield body 1.
A ring girder for reinforcing 2 is a rotation-operated erector body installed in the shield body 1, 2a is an erector ring as a rotating portion of the erector body 2, and 2b is a erector ring 2a which is rotatable. A plurality of rollers axially supported on the inner wall of the shield body 1 so as to be supported by a pair of arms, 2c is a pair of arms provided on the erector ring 2a, and 2d is a pair of pressing jacks for pressing a segment respectively attached to the pair of arms 2c. Reference numeral 2e is a pair of guide rods slidably inserted in the pair of arms 2c, and 2f is a substantially U-shape in a front view, which is slidably supported by the pair of arms 2c via the guide rods 2e. It is a hanging beam. When viewed from the front, the arms 2c, the pressing jacks 2d, and the guide rods 2e are provided in pairs as described above, but only one side thereof is shown in FIG. Although not shown, the erector includes the pressing jack 2d provided on the erector body 2 side, and the erector ring 2 installed on the shield body 1 side that is the fixed side.
It is provided with a hydraulic motor for rotating the erector body for rotationally driving a. By driving this hydraulic motor, the erector body 2 normally moves the erector ring 2a
The lining work is carried out by rotating in a desired direction by a desired rotation angle within a rotation angle range of forward and reverse half rotation margin (± about 200 °).

Explaining a hydraulic line which is a power line for driving and controlling the equipment on the side of the eclectic body 2 such as the pressing jack 2d. When this hydraulic line is provided, a pair of supply line and discharge line should be provided. However, only one of the pair of conduits is shown in FIG.
In FIG. 10, 20 is a pair of pipe joints fixed to the outer periphery of the erector ring 2a, 21 is a pair of pipe joints fixed to the ring girder 1a, 22 is one end connected to the pipe joint 20, and the other end is a pressing jack. Erector ring 2a for supplying hydraulic pressure to 2d and discharging such pressure oil
A pair of steel pipes for hydraulic pressure supply and discharge provided along
3 is formed by 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 so as to follow the rotation of the elector ring 2a. A pair of movable flexible conduits for supplying and discharging hydraulic pressure, 24 is a drum part around which the movable flexible conduit 23 is wound when the erector body 2 is rotated, and 25 is connected to the pipe joint 21 at one end 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, etc.
Since the pair of pipe lines 22, 23, 25 are connected to each other by the pipe joints 20, 21, the hydraulic pressure of the hydraulic pump is one of the pair of pipe lines 22, 23, 25. Through the fixed hydraulic line 25, the movable flexible line 23, the steel line 2
It is guided in the order of 2 and supplied to the pressing jack 2d and the like.
Further, the oil discharged from the pressing jack 2d and the like returns through the other of the pair of pipe lines 22, 23, 25 in the reverse order, and is returned to the hydraulic pump via a tank (not shown). The movable flexible conduit 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 immobile pipe joint 21 as described above. Since it functions so as to be able to move following the rotation, it is formed sufficiently long so as to have a margin corresponding to the maximum rotation movement distance of the pipe joint 20. Therefore, if the middle portion of the movable flexible conduit 23 is left as it is, an excess length is generated, and as described above, the movable flexible conduit 23 is slackened or bent and overlaps, and the movable flexible conduit 23 is At the time of the turning operation, the movable flexible conduit 23 as a flexible power conduit may be damaged by being caught on peripheral devices in the shield body. Therefore, in this conventional device, in order to process the surplus length, a mechanism for applying tension to the intermediate portion of the movable flexible conduit 23 is provided.

To explain the mechanism, in FIG. 10, reference numeral 26 is an automatic tensioning device which is a mechanism for applying the tension, and 27 is a wire reel mounted on the ceiling surface of the shield main body 1 in front of the erector so as to be rotatable. , 28 is the wire wound on this wire reel, 29 is this wire 2
The automatic tensioning device 26 includes a wire reel 27, a wire 28, and a pulley 29, which is a pulley for connecting an intermediate portion of the movable flexible conduit 23 connected to the pulley 8. When the intermediate portion of the movable flexible conduit 23 is wound around the pulley 29 around the wire reel 27, the pulley 28 is pulled in a direction in which the wire 28 is wound so as to continuously apply tension to the movable flexible conduit 23. A tension urging means such as a spring and a motor for urging is provided. Since the conventional device has such a configuration, the pulley 29 is shown in FIG. 10 when the wire reel 27 winds the wire 28 by its tension urging means when the erector body 2 is in the neutral position. In this way, the movable flexible conduit 2 corresponding to the length 2l is drawn by pulling in the direction away from the elector ring 2a (left in the figure) by a distance l.
Absorb a surplus length of 3. On the other hand, when the erector body 2 is rotated in either forward or reverse directions by a rotation angle of a half rotation margin (about 200 °), which is the maximum rotation angle, the movable flexible conduit 23 has its tension. The pulley 29 is moved to the position of the pipe joint 21 against the pulling force of the applying means, and while being wound around the drum portion 24, it is fed out to the maximum extent. Thus, according to this conventional device, the movable flexible conduit 23 may be slackened or bent and overlapped when the erector main body 2 is rotated to any position in the rotation angle range. Therefore, the accident of damage to the movable flexible conduit 23 caused by this can be prevented in advance. In addition, even when processing the slack of the signal cable, since no slip ring for transmitting the electricity or magnetic force for processing the slack is used, the flexible power path used The use is not restricted by the type.

[0007]

This automatic tensioning device 26
The erector of the conventional example having the above-described structure exhibits excellent features that are not found in other conventional techniques, but on the other hand, the shield body 1 having a long captain due to the provision of the automatic tensioning device 26 is provided. Since it can be installed only in a new environment, a new problem, which can be said to be fatal in practical use, arises. That is, in the shield machine, not only in changing the direction of excavation to smoothly bend it, but also in reducing the frictional resistance between the shield body 1 and the ground at the time of excavation to smoothly advance the excavation, Although it is basically necessary to shorten the length of the shield body 1 as much as possible, the erector of this conventional example is provided with the automatic tensioning device 26, so that the basic requirements can be met. Can't do it.

With respect to this point, as described above, the automatic tensioning device 26 provided in the conventional erector has the pulley 29 when the erector body 2 is in the neutral position.
Is pulled in a direction away from the elector ring 2a by a distance l so as to absorb the surplus length of the movable flexible conduit 23 corresponding to the length 2l. In order to be possible, the shield body 1 must have at least a length equal to the moving distance l of the pulley 29 plus a distance l'corresponding to the space required for installing the wire reel 27. It will be. Therefore, when the moving distance l of the pulley 29 is calculated with the diameter of the drum portion 24 being D and the circular constant being π, the moving distance l
Can be determined as follows.

2l = πD × 200 ° (maximum rotation angle of the elector body 2) / 360 ° ∴l = 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 l of the pulley 29 becomes about 2.6 m from the equation (1). Then, in addition to the distance of about 2.6 m, a distance l'corresponding to the space required for installing the wire reel 27.
Considering that it is necessary, the shield body 1
It is necessary to design the length to be about 3 m, which is about 1 m longer than that of a normal shield machine of this type. Thus, not only is it difficult for the conventional erector to be installed in a normal shield machine, but if it is intentionally installed, the length of the shield body 1 should be considerably longer than that of a normal shield machine. There is no choice but to impair the excavation function, which is the basic function of the shield machine.

In addition to such a problem, in the conventional erector, the wire reel 27 is installed in front of the shield body 1, so that the wire reel 27 is installed in the shield body 1 having a sufficient captain to install it. 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 foothold.
A pulley 29 is provided together with the wire reel 27 and the wire 2
If 8 is stretched, not only a maintenance problem occurs but also the installation location itself is restricted. In addition, installing such a conventional erector on a mid-break type shield machine, which is in high demand these days,
It is very difficult because the shield body 1 is divided and configured so that it can be bent in the middle and is substantially short, and the installation place is further restricted by the attachment of the middle-breaking jack, which is very difficult.

The present invention has been made in view of these problems in the conventional erector, and intends to improve the problems. It is possible to automatically prevent damage to a flexible power path and It has the same characteristics as the conventional erector that the usage is not restricted by the type of road, but it can be installed even if the shield body length is shortened, and it can be installed on any type of shield machine. An object of the present invention is to provide a versatile shield excavator erector that can be easily installed without being restricted.

[0012]

SUMMARY OF THE INVENTION An object of the present invention is to convey an eclectic main body which has an actuator and is rotatably operated for lining work by driving the actuator, and power for driving and controlling the actuator. It is used as a power path, and one end is connected to the erector body side so as to move according to the rotating operation of the erector body and the other end is fixed so as not to move, and has a length that can follow the rotating operation. In an erector of a shield machine having a flexible power path, a fixed frame body around which the flexible power path can be wound and flexibility when rotating the erector body in one direction from a neutral position. A roller that is wound around the middle part of the power path and can move with the movement of the flexible power path, and at the time of this movement, this roller can move around the fixed frame within a predetermined range. A guide body for guiding is provided, and when the middle portion of the flexible power path is wrapped around the roller, a tension applying means for applying a tension force to the flexible power path through the roller is applied. This is achieved by an erector of a shield machine as described in claim 1 of the characterizing claim.

[0013]

Since the erector of the shield machine of the present invention has such a configuration, the end of the flexible power path on the side of the erector body of the flexible power path is rotated by rotating the erector body in one direction from the neutral position. When the portion is moved in a direction counteracting the tension force of the tension applying means, the roller moves around the fixed frame body along with the movement of the intermediate portion of the flexible power path. As a result, since the flexible power path is wound around the fixed frame body, it is possible to rotate the erector body at a required rotation angle. In such a state, the erector body is rotated in the opposite direction to return to the neutral position, and the end portion of the flexible power path on the erector body side is moved to return to the reference position. An extra length is generated in the power path, but the extra length is absorbed by the tension imparting means by imparting the tension force through the roller, so that it is not caught or entangled in the peripheral device. In addition, when the end of the flexible power path on the erector body side is moved by rotating the erector body in the other direction from the neutral position, the intermediate portion is wrapped around the roller. As the road moves away from the roller 5 and shifts to a state in which the road is wound around the fixed frame while being guided by the roller 5, the erector body must be rotated by a required rotation angle. Is possible. In such a state, when the erector body is pivoted in the opposite direction to return to the neutral position, and the end of the flexible power path on the erector body side is moved to return to the reference position, the fixed frame body is moved. Since the flexible power path in a state of being wound around, the movement of the flexible power path moves away from the fixed frame and is wound around the roller, and the surplus length is absorbed. It will not get caught or entangled in peripheral devices.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a sectional view taken along the line I-I of FIG. 6 showing a main part of an erector of a shield machine according to an embodiment of the present invention, and FIG.
II-II line development view of FIG. 1, FIG. 3 is a III-III line sectional view of FIG. 2, FIG. 4 is a IV-IV line sectional view of FIG. 2, and FIG. FIG. 6 is a view similar to FIG. 3 showing a state in which it is rotated by 200 °, and FIG. 6 is a partially cutaway side view schematically showing the entire image by omitting details of the erector of the shield machine of the embodiment of the present invention. 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. Figure 1
8 to 8, the parts denoted by the same reference numerals as those in FIG. 10 represent the same parts as those in FIG. 10 and will not be described in detail to avoid duplication of description.

First, an overall image of the erector of the shield machine according to the embodiment of the present invention will be described with reference to FIGS. 6 to 8. The erector is only schematically shown in FIGS. 6 to 8. As with the conventional erector, "a pressing jack provided on the erector body 2 side, an unillustrated erector body rotating hydraulic motor installed on the shield body 1 side, and the like are provided to perform lining work. The eclectic main body 2 to be rotated is used, and one end is connected to the eclectic main body 2 side so as to move according to the rotational movement of the eclectic main body 2 and the other end is fixed so as not to move. And a flexible power path that is long enough to follow. In the shield excavator erector according to the present embodiment, which has the same configuration as the conventional erector, the drum portion 24 of the conventional erector is used.
The fixed frame body 3 is provided without providing such a thing. That is, the fixed frame body 3 is attached to the work floor 1a which is provided so as to project rearward (tail portion) from the shield body 1 through the inner diameter portion of the elector ring 2a. At the position corresponding to the upper part of the fixed frame 3, the beam 2h is directed from the rear end of the erector body 2 toward the same position.
By projecting, the rotation-side fixed end 2g for fixing the end of the cable conveyor 10 to the erector 1 main body side, which is the rotation side, is formed. This rotating side fixed end 2g
Thus, since it is integrally formed with the erector main body 2 to form an end portion on the rotation side, if the erector main body 2 is rotated left and right from the neutral position, the erector main body 2 turns left and right in response to this rotation operation. . The cable conveyor 10 is similar to a cable conveyor known in machine tools and the like, and accommodates an intermediate portion of the flexible power path 6 such as a cable or a hose, and pulls out both end portions of the flexible power path 6. It works to guide 6. The cable conveyor 10 has one end on the rotating 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 clamped by clamp members. The fixed side 2g of the flexible side of the flexible power path 6 pulled out from the cable conveyor 10 is connected to an electric device such as a control device in the erector body 2 for a cable and a hydraulic device such as an actuator for a hose. It The fixed frame 3 side of the flexible power path 6 is connected to a control panel if it is a cable and to a hydraulic pump as a hydraulic source if it is a hose. The shield machine excavator erector according to the present embodiment is configured based on the above-described structure to form a mechanism for applying tension to the flexible power path 6 as shown in FIGS. 1 to 5. The mechanism has the greatest feature of this embodiment.

Therefore, referring to FIGS. 1 to 5, the mechanism will be described in detail. Reference numeral 3 has an annular groove formed by side plates 3a and 3b and a bottom plate 3c on the outer peripheral portion thereof, and the bottom plate 3c has a flexible power path. A ring-shaped fixed frame around which 6 can be wound,
Numeral 4 is provided on the tops of the side plates 3a and 3b of the ring-shaped fixed frame 3 along substantially the entire circumference along the annular groove, and guides the roller 5 described later so that it can move around the fixed frame 3 by about 90 °. The pair of guide bodies 5 has a roller body around which the flexible power path 6 is wound, and the pair of guide bodies 4
The roller 7 mounted so that it can be moved within a predetermined range around the fixed frame 3 while being guided by, is mounted via a tension spring 8 in the guide body 4 so as to slide along the guide direction, It is a slider that transmits a spring force to the roller 5 by engaging with and moving when moving upward. The mechanism of this embodiment is roughly classified as follows.
It is composed of these fixed frame 3, a pair of guide bodies 4, rollers 5 and slider 7. As can be seen from FIG. 1, the fixed frame 3 has a flexible power path 6 formed by notching one portion of the bottom plate 3c in a U shape and bending the notched piece inward.
3d is formed, and the other end of the cable conveyer 10 is guided from this outlet 3d along the cutout piece and fixed by the fixing portion 3e on the cutout piece. As shown in FIG. 4, the pair of guide bodies 4 are
A frame body having a rectangular cross section composed of the side plates 4a and 4b, the bottom plate 4c, and the upper plate 4d is formed, and the fixed frame side plates 3a and 3 have a space B'which is slightly wider than the width B of the roller body of the roller 5.
Mounted parallel to the outside of each top of b. When the guide body 4 is provided on the fixed frame 3 in this manner, in this embodiment, it is provided on the left side substantially half circumference of the ring-shaped fixed frame 3 in the present embodiment, but may be provided on the right side substantially half circumference. The roller 5 is fixed to each side plate 4b of the pair of guide bodies 4 by the fixed frame body 3
1 is formed in the range from the lower end X to the upper end Y in FIG. 1, that is, in the range of about 90 ° to the upper left. As shown well in FIG. 3, the bottom plate 4c and the upper plate 4d of each guide body 4 are formed in a circular arc shape concentric with the ring-shaped fixed frame body 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 elongated hole 4e. As well shown in FIG. 4, the roller 5 is a roller body having an annular groove formed on the outer peripheral portion formed by a rim 5b slightly wider than the cable conveyor 10 and guide flanges 5c provided at both ends thereof. It comprises 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 elongated holes 4e of each guide body 4 so that the bearings 5d at both ends thereof are housed in the pair of guide bodies 4. As a result, the roller main body is interposed between the pair of guide bodies 4 and is arranged such that the outer peripheral portion is located in the annular groove of the fixed frame 3. As will be apparent with reference to FIGS. 2 to 4, the slider 7 includes a rectangular base plate 7a having a curvature substantially equal to that of the bottom plate 4c of the guide body, and vertically arranged at four corners on the inner diameter side of the base plate 7a. A lower roller 7b ₁ which is rotatably projected,
7b ₂ , a horizontal roller 7c rotatably projecting laterally at the four corners of the base plate 7a, a stopper 7d mounted above the outer diameter side of the base plate 7a, and a bracket 7e mounted on the lower end of the base plate 7a. Consists of. The slider 7 is slidably mounted in the guide body 4 so as to slide on the bottom plate of the guide body by the lower rollers 7b ₁ and 7b ₂ . In that case, while the lower roller 7b ₁ is locked to the stopper 4f of the guide body 4, a tension spring 8 is stretched between the bracket 4g and the bracket 7e, and as the roller 5 moves upward, Bearing 5d and stopper 7d
Is arranged so that it can be slid upward together with the roller 5. The cable conveyor 10 is shown in FIG.
As shown in, one end is fixed to the rotation side fixed end 2g, the intermediate part is introduced into the annular groove of the roller body of the roller 5 and folded back while being wound around, and introduced into the environmental groove of the fixed frame 3. While being wound around the bottom plate 3c of the fixed frame body 3, it is guided to the outlet 3d, and the other end is fixed to the fixed portion 3 of the fixed frame 3.
Fix to e. In FIG. 1, O is a rotation-side fixed end 2g.
Is a reference position that is a neutral position where R is not turned, R
Is a right turn 200 ° position which is a limit position when the turning side fixed end 2g is turned to the right, and L is a left turn 200 ° which is a limit position when the turning side fixed end 2g is turned to the left side. Indicates a position.

Since the erector of this embodiment has such a structure, the erector body 2 is set to the neutral position in the unoperated state, and the rotating side fixed end 2g is set to the reference position O in FIG.
3, the roller 5 is stationary because the shaft 5a of the roller 5 is locked to the lower stop end X of the elongated hole 4e of the guide body 4, and the slider 7 is lower than the lower end thereof. The roller 7b ₁ is stationary because it is locked by 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,
Further, the slider 7 is positioned below the stopper 7d of the slider 7 and separated therefrom, and the slider 7 is pulled downward by a pulling spring 8 with a slight force. Also,
The cable conveyor 10 having the intermediate portion wound around the roller 5 is in a suspended state apart from the roller 5. As described above, when the rotation-side fixed end 2g is at the reference position O, the length 2l (= 0.8 in the equation (1)) is calculated.
7D × 2 = 1.74D) equivalent cable conveyor 10
It is necessary to absorb the surplus length of somewhere. However, in the erector of the present embodiment, this occurs between the rotation side fixed end 2g and the roller 5 to the fixed portion 3e on the fixed frame 3 side. Is designed to absorb.

In such a state, if the erector body 2 is now rotated in the leftward rotation direction, that is, in the counterclockwise direction, the rotation-side fixed end 2g is also rotated in the same direction, and the intermediate portion is wound around the roller 5. The cable conveyer 10 which is designed to move is separated from the roller 5 as the turning progresses, and is guided by this, and the bottom plate 3 of the fixed frame 3 is guided.
It shifts to a state in which it is wound around the left side of c. Then, 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 which is the limit position of the left turn.
When turned 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 a turning limit switch (not shown). . In such a state, when the erector main body 2 is rotated clockwise to return it to the neutral position, the rotation-side fixed end 2g also swivels in the same direction, and the cable conveyor is wound around the fixed frame 3. 10 is the bottom plate 3 of the fixed frame 3 as the turning progresses.
When it is separated from c and smoothly moves to a state in which it is wound around the roller 5 and turns to the reference position O, it returns to the state shown by the solid line in FIG. During the above operation, both the roller 5 and the slider 7 naturally remain stationary, and the cable conveyor 10 moves the roller 5
However, when the cable conveyor 10 is separated from the fixed frame 3, it is guided by the fixed frame side plates 3a and 3b and guided by the guide flange 5c of the roller 5 to the roller 5 when the cable conveyor 10 is separated from the fixed frame 3. Because it is wrapped around, it will not get caught or tangled with peripheral devices.

As described above, when the erector body 2 is returned to the neutral position and further rotated clockwise, that is, in the clockwise direction, the cable conveyor 10 hanging down around the roller 5 is suspended. As can be seen with reference to FIG. 3, the roller 5 is immediately brought into close contact with and pulled up, so that the bearing 5 of the roller 5
d is also pulled up and engages with the stopper 7d of the slider 7. Then, if the turning is continued as it is, the cable conveyor 10 is pulled to the right side by the turning, and accordingly, the bearing 5d and the stopper 7d are pulled by the pulling force of the pulling spring 8 while being engaged in this manner. Pull up against. In that case, the roller 5
Since the shaft 5a is guided by the elongated 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 sliding on the bottom plate 4c of the guide body 4 without resistance, and the horizontal roller 7c
With the function of, the side plates 4a and 4b can smoothly guide.
In this way, when the roller 5 moves along the ring-shaped annular groove of the fixed frame body 3 from the lower end X of the long hole 4e toward the upper end Y, the cable conveyer 10 can be clearly seen from FIG. Will eventually be wound around the right side of the bottom plate 3c of the fixed frame 3. Then, when the turning side fixed end 2g turns to the right turn 200 ° position R, which is the limit position of the right turn,
The erector body 2 is stopped by a turning limit switch (not shown). At this time, the roller 5 stops before the upper end Y as shown in FIG. 5, and the cable conveyor 10
The fixed frame 3 is wound around the right half. In this state, as is clear from FIG. 5, the cable conveyor 10 is wound around the fixed frame 3 while being wound around the roller 5, unlike the above-described case in which the erector body 2 is rotated leftward. It is in a broken state. Looking at the force acting on the cable conveyor 10 in the process of pulling up the roller 5 from the lower toe X to the upper toe Y in this way, when the roller 5 tries to pull 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 total component weight of the roller 5 and the slight tension force of the spring 8 act on the cable conveyor 10, and the minimum component force of the weight of the roller 5 and the maximum tension force of the spring 8 are applied. The force acts on the cable conveyor 10. Therefore, while rotating the erector main body 2 from the neutral position to the right rotation direction, unlike the other cases, the spring 8 receives a pulling force in the direction opposite to the rotation direction. The operating force required to rotate the main body 2 can be considered to be substantially uniform in the entire operating process, and the operating force does not vary greatly.

In such a state, the erector body 2
If you rotate to the left to return the to the neutral position,
The cable conveyor 10 in the state of being wound around the fixed frame 3 also swivels in the same direction as the swivel-side fixed end 2g, and the bottom plate of the fixed frame 3 remains wound around the rollers 5 as the swivel progresses. Leave from 3c. When the turning side fixed end 2g is turned from the right turn 200 ° position R to the reference position O in this manner, the state shown by the solid line in FIG. 1 is restored. Meanwhile, the roller 5 is guided by the elongated hole 4e of the guide body 4 and moves along the annular groove of the fixed frame body 3 from the vicinity of the upper stop end Y toward the lower stop end X direction. In this way, when the roller 5 moves near the bottom toe X, the slider 7
The lower roller 7b ₁ is the stopper 4f of the guide body 4.
When the roller 5 itself is moved to the lower stop end X, the shaft 5a of the roller 5 itself is moved to the long hole 4e of the guide body 4
It is locked on the lower edge and stopped. As a result, roller 5
Since the tension cannot be applied to the cable conveyor 10, when the turning side fixed end 2g is swung to the reference position O, the cable conveyor 10 is in a state in which the intermediate portion is wound around the roller 5. It will hang apart from the roller 5. The states of the roller 5, the slider 7, and the cable conveyor 10 when the rotation-side fixed end 2g is rotated to the reference position O through such processes are as shown in FIG. In the process of moving 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 due to its own weight and the pulling force of the tension spring 8. The cable conveyor 10 has a roller 5 in the middle thereof.
Through the application of tension, it will be pulled toward the left side without being caught or tangled with peripheral devices. As is clear from what has been described above, the tension force is almost uniform in the entire operation process of the erector body 2, and the erector body 2 is rotated without causing a large fluctuation in the tension force. The same applies to the operating force required for.

Therefore, according to the present embodiment, the surplus length of the flexible power path 6 is always absorbed no matter which position in the rotation angle range the erector body 2 is rotated. The power passage 6 does not slacken or bend to be overlapped, and damage to the flexible power passage 6 caused by this can be prevented. In that case, in this embodiment, the excess length of the flexible power path 6 is absorbed in the cross-sectional direction of the erector body 2, and the pulley 29 is moved from the erector ring 2a to the erector ring 2a as in the conventional erector. Since it does not attract the surplus length by pulling it in the direction of separation, it can be installed even if the length of the shield body is shortened, and it is a special constraint for any type of shield machine. Without receiving
It can be installed easily. Further, even when a signal cable is used as the flexible power path 6, since a slip ring for transmitting the electricity or a magnetic force for processing the slack is not used at all, weak electricity is not used. Signals can be reliably transmitted, and the use of the flexible power path used is not restricted. In addition to these effects, according to the present embodiment, the fixed frame body 3 has a substantially complete hollow portion, and there is almost no obstacle inside thereof, so that the earth pressure system shield machine When installing a soil discharging device such as a screw conveyor or a mud pipe of a muddy water shield machine in the shield body 1, the soil discharging device can be installed by inserting it into the hollow portion without any restrictions. It can be easily installed without receiving it. Further, the operating force required to rotate the erector body 2 and the tension force applied to the cable conveyor 10 are substantially uniform in the entire operation process of the rotating operation of the erector body 2 in each direction, and large fluctuations occur. Therefore, stable operation and processing of the erector body 2 and the cable conveyor 10 can be performed.

In this embodiment, an example in which the tension of the roller 5 and the tension spring 8 is applied to the intermediate portion of the cable conveyor 10 has been described. However, by attaching a weight to the roller 5, the weight of the roller 5 is reduced. Since the object of the present invention can be achieved by making the size sufficiently large, the tension spring 8 can be omitted.
It suffices that the cable conveyor 10 is provided with a tension applying means for applying a tension through the roller 5 when the intermediate part of the above is wound around the roller 5. Further, in the present embodiment, the middle portion of the flexible power path 6 is housed in the cable conveyor 10, but such a thing is omitted and the flexible power path 6 is wound directly on the roller 5. It can also be installed.

[0023]

As is apparent from the above description, the present invention has a structure described in the claims, in particular, "a fixed frame body around which a flexible power path can be wound, and an erector body are neutral. A roller that can be moved along with the movement of the flexible power path when the intermediate portion of the flexible power path is wrapped around when the rotary operation is performed in one direction from the position, and this roller during the movement. And a guide body that guides the movable body around the fixed frame so that it can move within a predetermined range, and when the middle part of the flexible power path is wrapped around the roller, tension force is applied to the flexible power path through the roller. Since the erector main body is rotated to any position in the rotation angle range, the surplus length of the flexible power path is increased. Always absorbed, the flexible power path It never as or overlapping bent Rundari, can be reliably prevented from being damaged. In that case, the excess length of the flexible power path is absorbed in the cross-sectional direction of the erector body, and the excess length is pulled by pulling the pulley in the direction away from the erector ring like the erector of the conventional example. Since it does not absorb the noise, it can be installed even if the length of the shield body is shortened, and it is easily installed on any type of shield machine without any special restrictions. You can In addition, even when a cable is used as the flexible power path, weak electric signals can be reliably transmitted, so that the usage is not restricted by the type of the flexible power path to be used. It is possible to obtain the erector of the shield machine with the property.

[Brief description of drawings]

FIG. 1 is a sectional view taken along line I-I 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 line II-II of FIG.

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

4 is a sectional view taken along line IV-IV in FIG.

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

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

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

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

FIG. 9 is a cross-sectional view of an erector of a shield machine that has been conventionally used for practical use.

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

[Explanation of symbols]

1 Shield main body 2 Electa main body 2a Erector ring 2d Pushing jack 2g Rotating side fixed end 3 Fixed frame body 3d Flexible power path outlet 3e Fixed part 4 Guide body 4e Guide long hole 4f Stopper 5 Roller 5a Shaft 5b Rim 5c Guide flange 5d Bearing 6 Flexible power path 7 Sliders 7b ₁ and 7b ₂ Lower roller 7c Horizontal roller 7d Stopper 8 Extension spring 10 Cable conveyor

Claims (3)

[Claims] 1. An eclectic main body which has an actuator and is rotatably operated to perform a 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 eclectic main body is rotatively operated. Electa of shield machine equipped with flexible power path that is connected to the erector body side so as to move according to In the case of (1), when the fixed frame body around which the flexible power path can be wound and the erector body are rotated in one direction from the neutral position, the middle part of the flexible power path is wrapped around and the flexible power path is A roller that can move along with the movement of the road and a guide body that guides this roller so that it can move within a predetermined range around the fixed frame body during the movement are provided. An erector for a shield machine, characterized in that a flexible power path is provided with a tension applying means for applying a tension through the roller when the space is wound around the roller. 2. The erector of a shield machine according to claim 1, wherein at least a self-weight of the roller or a spring force for urging the roller is used as the tension applying means. 3. The tension applying means is attached to the guide body via a spring so as to move along the guide direction, and engages the roller when the roller moves along with the movement of the flexible power path. 2. The shield machine excavator erector according to claim 1, wherein the slider is a slider that moves in unison and transmits a spring force to the roller.