JP2010229805A - Movable deck, and shield machine equipped with the movable deck - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technology related to a movable deck and a shield machine having the movable deck including a handrail hardly interfering with the turning range of an erector apparatus. <P>SOLUTION: The movable deck 19 provided at the shield machine 1 is constituted to be deformable not to interfere with the erector apparatus 11 transporting segments 10 and to include the folding handrail 23 foldable by carrying out turning operation within a plane that intersects the advancing direction of the shield machine 1. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a movable deck provided in a shield machine and capable of being deformed so as not to interfere with an erector apparatus, and a shield machine provided with the movable deck.
In the following, when the elector device includes a transport device that swivels and transports a segment, the swivel range of the transport device or a space defined as the swivel range may be referred to as a swivel range or swivel space of the elector device.

Segments are assembled to the tunnel excavation surface dug by the shield machine. This assembly is performed by an erector device, but fastening of the segments with bolts is often performed manually by an operator, and it is necessary for the operator to approach the segment and visually check the position when finely adjusting the position. There are many cases. Therefore, the shield machine requires a work deck that serves as a scaffold for workers.
Such work decks are roughly classified into those fixed to the shield machine (fixed deck) and movable (movable deck), and some have both a fixed deck and a movable deck.

  The work deck, including its components and attachments, must not interfere with the transport device during segment transport work by the erector device. Since the fixed deck is itself fixed, it should not interfere in any state of the erector device. On the other hand, since the movable deck itself is movable, it is necessary to evacuate it so that it does not interfere with the transportation of the segment of the erector device. After the transportation, the operator can access the segment as necessary. In order to do so, it is configured to project to the excavation wall surface side.

As an example of such a movable deck, for example, Patent Document 1 describes a work deck of a shield machine, and this work deck includes a plurality of slide scaffold devices in the vertical direction. The scaffolding can be provided inside and outside the turning range of the elector device at a timing that does not hinder the turning operation of the elector device.
Each scaffold device includes, as a work deck, a fixed scaffold (fixed deck) with a fixed handrail and a movable scaffold (movable deck) with a movable handrail provided slidably on the fixed scaffold.
(In the following explanation, the movable scaffold is a movable deck, and the fixed scaffold is a fixed deck, and the description is unified unless otherwise described in relation to the prior art.)

JP 2003-120198 A

In the prior art described above, in some of the plurality of slide scaffold devices, the sliding direction of the movable deck and the movable handrail is the digging direction, and the rest is the direction perpendicular to the digging direction. When performing such a sliding operation, the possibility that the movable handrail will interfere with the turning range of the erector is increased if the movable handrail is not deformed, for example, folded.
Therefore, regardless of the diameter of the shield machine, it is desirable that the movable handrail be deformed so that it does not interfere with the swiveling range or swivel space of the erector device, and therefore the movable scaffold (and hence the work deck). It is desirable to have such a movable handrail.

  Note that the fixed handrail 29 shown in FIG. 12 of Patent Document 1 is arranged outside the turning range of the elector device so as to cross the turning range, so it is assumed that the fixed handrail 29 can be inserted and removed together with the movable handrail 30. The This is because interference with the erector apparatus cannot be avoided unless configured in this manner. However, it is troublesome for the operator to insert and remove the handrail so that the handrail does not interfere with the erector device. However, it is dangerous to work while the handrail is removed just because it is bothersome to insert and remove the handrail.

  In addition, since the movable deck and the movable handrail are devices that are relatively infrequently used, it is not preferable that the movable deck and the movable handrail interfere with the work of the operator when not in use. In particular, it is not preferable that the driving device for operating the movable deck and the movable handrail and the incidental equipment (including a hydraulic hose and a power supply cable) for supplying power to the driving device are bulky. Furthermore, it cannot be said that high functionality with increased cost is preferable. In other words, it is desirable that the device is as compact as possible and the cost can be kept low.

  The present invention has been made in view of the above problems, and an object thereof is to provide a technique related to a movable deck provided with a handrail that hardly interferes with a turning range of an erector apparatus, and a shield machine having the movable deck. To do.

  In order to achieve the above object, a movable deck according to the first embodiment of the present invention is a movable deck provided in a shield machine, and the movable deck includes a handrail that can move in conjunction with the deformation operation. It is characterized by this.

  A movable deck according to a second aspect of the present invention is a movable deck provided in a shield machine, and the movable deck is configured to be deformable so as not to interfere with an erector apparatus that transports a segment. A handrail that is movable in conjunction with the deformation operation is provided.

  A movable deck according to a third embodiment of the present invention is a movable deck provided in a shield machine, and the movable deck is configured to be deformable so as not to interfere with an erector device that transports a segment, and is folded. A handrail is provided, and the folding operation of the handrail has a component that moves horizontally between the shield machine and the tunnel wall surface excavated by the shield machine.

  A movable deck according to a fourth aspect of the present invention is a movable deck provided in a shield machine, and the movable deck is configured to be deformable so as not to interfere with an erector apparatus that transports a segment, and is shielded. A handrail that can be folded is provided in a plane that intersects the digging direction of the digging machine.

  The movable deck according to a fifth aspect of the present invention is the one according to any one of the first to fourth aspects, wherein the erector device includes a transporting device that swivels and transports a segment, and the movable deck includes: In the plane intersecting with the excavation direction, it can be arranged together with the handrail at a position inside the turning range of the transporting device and not interfering with the turning range.

  A movable deck according to a sixth aspect of the present invention is the movable deck according to any one of the first to fifth aspects, wherein the handrail includes a link mechanism that enables interlocking with the deformation operation of the movable deck. It is characterized by this.

  According to a seventh aspect of the present invention, in the movable deck according to any one of the first to sixth aspects, the deformation operation of the movable deck is such that the deck portion of the movable deck moves in the traveling direction of the shield machine. It slides in the direction which intersects with a handrail, and a handrail folds.

  The movable deck according to an eighth aspect of the present invention is the one according to any one of the first to seventh aspects described above, wherein the deformation operation of the movable deck is such that one end side of the deck portion serving as a workbench is placed on the fixed deck side. And a pivoting motion in a plane intersecting the digging direction of the shield machine, and the handrail is folded.

  A shield machine according to a ninth aspect of the present invention includes the movable deck according to any one of the first to eighth aspects.

A shield machine according to a tenth aspect of the present invention is an erector apparatus capable of a normal speed turning operation, which is a fine speed turning operation and a turning operation at a higher speed than the fine speed turning operation, and a fixed where an operator works. A shield machine equipped with a deck and a movable deck installed on the fixed deck and deformable so as not to interfere with the erector device,
The movable deck is provided with a foldable handrail in a plane intersecting the excavation direction,
The handrail is folded from the tunnel excavation wall surface side to the fixed deck side when the erector device is performing the normal speed turning operation, and when the erector device is not performing the normal speed turning operation, the handrail is It can be extended from the fixed deck side toward the tunnel excavation wall surface side.

  A shield machine according to an eleventh aspect of the present invention is the shield machine according to the tenth aspect, wherein the handrail includes a link mechanism that enables interlocking with the deformation operation of the movable deck. Is.

  The shield machine according to the twelfth aspect of the present invention is the one according to the tenth or eleventh aspect, wherein the deformation operation of the movable deck is such that the deck portion of the movable deck intersects the traveling direction of the shield machine. And a handrail is folded and moved in a sliding direction.

  A movable deck according to a thirteenth aspect of the present invention is a movable deck provided in a shield machine, and the movable deck is configured to be deformable so as not to interfere with an erector apparatus that transports a segment. A handrail that is movable in conjunction with the deformation operation is provided, and the handrail functions as a handrail even at a position where it does not interfere with the erector apparatus.

  The movable deck which concerns on the 14th form of this invention concerns on the said 13th form, Comprising: The said handrail guards both the outward side and side surface side of the deck part of the said movable deck. It is characterized by this.

  A movable deck according to a fifteenth aspect of the present invention is the one according to the thirteenth or fourteenth aspect, wherein the erector device includes a transporting device that swivels and transports the segment, and the movable deck has a digging direction. In the plane that intersects with the handrail, it can be arranged with the handrail at a position inside the turning range of the transporting device and not interfering with the turning range.

  A movable deck according to a sixteenth aspect of the present invention is the one according to the thirteenth to fifteenth aspects, wherein the handrail tilts in conjunction with the deformation operation of the movable deck. .

  According to a seventeenth aspect of the present invention, in the movable deck according to the thirteenth to sixteenth aspects, the deformation operation of the movable deck is such that the deck portion of the movable deck intersects the traveling direction of the shield machine. While sliding in the direction, the handrail is provided on the deck portion and tilts.

  A movable deck according to an eighteenth aspect of the present invention is the movable deck according to the seventeenth aspect, wherein the movable deck is provided so as to connect the handrail and the fixed deck side, and is deformable as the deck portion slides. A railing is provided.

  A movable deck according to a nineteenth aspect of the present invention is the movable deck according to the thirteenth to eighteenth aspects, wherein the handrail moves to the fixed deck side when the movable deck moves from the fixed deck side to the tunnel excavation wall surface side. The handrail tilts from the tunnel excavation wall surface side to the fixed deck side when the movable deck moves from the tunnel excavation wall surface side to the fixed deck side. It is.

  A movable deck according to a twentieth aspect of the present invention is the one according to the thirteenth to nineteenth aspects, characterized in that it includes a lock mechanism that holds the handrail upright.

  According to a twenty-first aspect of the present invention, in the movable deck according to the thirteenth to twentieth aspects, the lock mechanism performs a locked state and an unlocked state in conjunction with the movement of the movable deck. It is a feature.

  A shield machine according to a twenty-second aspect of the present invention includes the movable deck according to any one of the thirteenth to twenty-first aspects.

A shield machine according to a twenty-third aspect of the present invention is an erector apparatus capable of a normal speed turning operation that is a turning operation at a faster speed than the slow turning operation, and a fixed operation on which an operator performs work. A shield machine equipped with a deck and a movable deck installed on the fixed deck and capable of being deformed so as not to interfere with the erector device;
The movable deck includes a handrail that can be tilted in a plane that intersects the excavation direction,
When the erector device is performing the normal speed turning operation, the movable deck and the handrail are disposed at positions that do not interfere with the turning operation of the erector device, and when the erector device is not performing the normal speed turning operation, The movable deck can move from the fixed deck side to the tunnel excavation wall surface side, and the handrail can stand from the fixed deck side toward the tunnel excavation wall surface side.

  In the description of each of the above embodiments, “configured so as to allow deformation operation” includes various modes. As an example or one mode, the deck unit (working platform unit) of the movable deck is a shield machine. And a handrail tilts and moves in and out of the turning range of the erector device.

  In addition, as another example of “configured to be deformable” or another aspect, the deck part (working table part) of the movable deck rotates in a plane intersecting the traveling direction of the shield machine and the handrail is The thing which goes in and out with respect to the turning range of an elector apparatus by folding operation | movement is mentioned.

  One example or one aspect of the folding operation of the handrail is based on a rotational movement in a plane that intersects the direction in which the shield machine is engraved, and the other example or another aspect is the shield machine and the tunnel excavated thereby. This is an operation having a component that moves horizontally between the walls. A typical example of the latter operation, i.e., having a component that moves horizontally between the shield machine and the tunnel wall excavated thereby, is between the shield machine and the tunnel wall excavated thereby. Although it is a telescopic motion along the horizontal direction, in the former motion, that is, in the folding motion by the rotational motion in the plane intersecting the direction of the shield machine, the shield machine and the tunnel wall surface dug by it As long as it has a component that moves horizontally between the two, it corresponds to the latter operation.

  Moreover, in description of said each form, entering / exiting with respect to the turning range of an elector apparatus means exiting from the turning range of an elector apparatus, and entering into the turning range of an elector apparatus, respectively. If it goes out of the turning range of an elector apparatus, since it will be arrange | positioned outside the turning range of an elector apparatus, it will be in the positional relationship which does not interfere with an elector apparatus. Moreover, since it will be arrange | positioned in the turning range of an elector apparatus if it enters into the turning range of an elector apparatus, it will be in the positional relationship which interferes with an elector apparatus.

  Further, “in the plane intersecting the excavation direction” is intended to exclude those in which the rotation direction in the rotation operation of the deck portion serving as the work table is parallel to the excavation direction. However, considering that the deck section can better avoid the interference with the erector device by the turning operation, this "in-plane crossing the digging direction" is a direction that is close to the digging direction. More desirable.

According to the first aspect of the present invention, since the movable deck is provided with the handrail that can move in conjunction with the deformation operation, the space required for the deformation is small and compact while being safe for the operator. Become.
According to the first aspect of the present invention, the movable deck is configured to be deformable so as not to interfere with the erector apparatus that carries the segment, and is configured to include a handrail that can move in conjunction with the deformable operation. Therefore, the space required for deformation is small, and the operation of the erector apparatus is not hindered.
Therefore, according to the first and second embodiments of the present invention, it is possible to realize a movable deck that can be installed even when the shield machine has a small diameter as well as a small diameter.

  According to the third embodiment of the present invention, the handrail of the movable deck is configured so as to be capable of a folding operation having a component that moves horizontally between the shield machine and the tunnel wall surface excavated thereby. Therefore, as in the case of the first and second embodiments, the space required for deformation can be small. Therefore, it is possible to realize a movable deck that can be installed even when the shield machine has a large diameter as well as a small diameter.

  According to the fourth aspect of the present invention, since the handrail of the movable deck is configured to be foldable in a plane that intersects the direction of the shield machine, it moves horizontally when viewed as the entire movable deck. Movement (eg, movement having a horizontal component between the shield machine and the tunnel wall excavated thereby) or vertical deformation is possible. Requires less space. Therefore, it is possible to realize a movable deck that can be installed even when the shield machine has a large diameter as well as a small diameter.

  The movable deck which concerns on the 5th form of this invention can be arrange | positioned with a handrail in the position which does not interfere with the said turning range inside the turning range of the conveying apparatus with which an elector apparatus is provided in the surface which cross | intersects an excavation direction. Therefore, regardless of the diameter of the shield machine, it is possible to realize a desirable movable deck and thus a work deck.

  Since the movable deck according to the sixth aspect of the present invention includes a link mechanism that enables the movable deck to be interlocked with the deformation operation, a separate driving source is not required for the folding operation of the handrail. In addition, if the movable deck is configured to be interlocked with the deformation operation, it is possible to install the handrail in a usable state when the movable deck is required, and a burden that an operator installs the handrail separately. There is no rational structure.

  The movable deck according to the seventh aspect of the present invention is configured such that the deformation operation is such that the deck portion of the movable deck slides in a direction intersecting the traveling direction of the shield machine and the handrail folds. Therefore, it can function as a work table at any position of the deck portion slide, that is, even when the deck portion is not moved outward most. Therefore, in order to allow the handrail that performs the folding operation to function as the handrail, for example, it is possible to complete the assembly of the handrail when the slide to the outside of the deck portion has progressed a predetermined amount. Good.

  In the movable deck according to the eighth aspect of the present invention, the deformation operation is such that the one end side of the deck portion serving as a workbench is pivotally connected to the fixed deck side and intersects the digging direction of the shield machine. Since the handrails are configured to be pivoted at the same time, the members constituting the movable deck need not be arranged inside the fixed deck, and therefore the members related to the movable deck are not provided on the fixed deck side. It is not necessary to secure a space for installation, and it is not necessary to consider interference with members installed on the fixed deck side. Therefore, it is possible to secure a work area for workers who work on the fixed deck, and it is possible to secure safety without interfering with work. For example, even when a screw conveyor is installed in the center of the shield machine such as a mud type shield machine, the movable deck does not need to consider interference with the screw conveyor, Assembly work can be performed quickly. Further, it is possible to realize a movable deck that can be installed even when the shield machine has a large diameter as well as a small diameter.

  Since the shield machine according to the ninth aspect of the present invention includes the movable deck according to any one of the first to eighth aspects, the effects exhibited by the first to fifth aspects can be achieved. A shield machine with a movable deck can be realized.

  In the shield machine according to the tenth aspect of the present invention, the movable deck includes a foldable handrail in a plane intersecting the digging direction, and when the erector device is rotating at a normal speed, the handrail is Folded from the tunnel excavation wall surface side to the fixed deck side, and configured so that the handrail can be extended from the fixed deck side toward the tunnel excavation wall surface side when the erector device is not rotating at the normal speed. As a result, it is possible to accurately link the operation of the erector device. In other words, when the erection device that interferes with the erection device is performing a normal speed turning operation, the handrail is folded and there is no danger of interference with the erection device, and the erection device is not operating at the normal speed turning operation. Can extend the handrail, and can also work by extending the handrail according to the situation. Thereby, a shield machine with a small space occupied by the movable deck can be realized. The tenth embodiment is particularly useful when realizing a shield machine with a small diameter.

  In the shield machine according to the eleventh aspect of the present invention, the handrail is provided with a link mechanism that enables interlocking with the deformation operation of the movable deck, so that it is the same as described in the sixth aspect. In addition, since a link mechanism that enables interlocking with the deformation operation of the movable deck is provided, a separate drive source and actuator are not required for the handrail folding operation. Since such a handrail folding operation does not use a separate drive source or actuator, the risk of occurrence of such failures is low, and it can be installed in a compact space as in the prior art. Further, if interlocking with the deformation operation of the movable deck, the handrail can be assembled in a usable state when the movable deck is required, and a rational structure can be obtained.

  In the shield machine according to the twelfth aspect of the present invention, the movable deck is deformed so that the deck portion of the movable deck slides in a direction intersecting the traveling direction of the shield machine and the handrail folds. Since it is configured, a shield machine with a movable deck that can function as a work table at any position of the deck part slide, that is, even when the deck part is not moving outward most, realizable. In order to allow the handrail that performs the folding operation to function as the handrail, for example, the assembly of the handrail may be completed when a predetermined amount of sliding outward of the deck portion proceeds.

According to the thirteenth aspect of the present invention, since the movable deck is provided with the handrail that can move in conjunction with the deformation operation, the space required for the deformation is small and compact while being safe for the operator. Become.
According to the thirteenth aspect of the present invention, the movable deck is configured to be deformable so as not to interfere with the erector apparatus that carries the segment, and is configured to include a handrail that can move in conjunction with the deformable operation. Therefore, the space required for deformation is small, and the operation of the erector apparatus is not hindered.
Furthermore, according to the thirteenth aspect of the present invention, since the handrail functions as a handrail even in a position where it does not interfere with the erector device, it is possible to prevent the operator from falling even when the movable deck is in the retracted state, and to improve safety. Are better.

  According to the fourteenth aspect of the present invention, since the handrail guards both the outer side and the side surface of the deck portion of the movable deck, it is possible to effectively prevent the operator from falling and to improve safety. Are better.

  According to the fifteenth aspect of the present invention, the erector device includes a transport device that swivels and transports the segment, and the movable deck is located on the inner side of the swivel range of the transport device in a plane that intersects the excavation direction. Since it can be arranged together with the handrail at a position that does not interfere with the turning range, a desirable movable deck, that is, a work deck can be realized regardless of the diameter of the shield machine.

  According to the sixteenth aspect of the present invention, since the handrail tilts in conjunction with the deformation operation of the movable deck, no separate drive source is required to tilt the handrail. In addition, because it is configured to be linked to the deformation operation of the movable deck, it can be installed in a state where the handrail can be used when the movable deck is required, and the operator installs the handrail separately. It is possible to make a rational structure without any burden.

According to the seventeenth aspect of the present invention, the movable deck is deformed by sliding the movable deck in a direction intersecting the traveling direction of the shield machine, and the handrail is provided in the deck. Therefore, it can function as a work table at any position where the deck portion slides, that is, even when the deck portion is not moved outward most. In addition, in order to make the handrail which tilts perform the function as the handrail, you may comprise so that the raising of a handrail can be completed, for example, when the slide to the outward of a deck part advances predetermined amount.
Further, since the handrail is provided on the deck portion on which the handrail slides, the handrail moves, for example, inward and outward with the movement of the deck portion. Therefore, it is not necessary to provide a moving mechanism that moves inward and outward in the handrail itself, and the structure is simplified.

  According to the eighteenth aspect of the present invention, the deck rail is provided so as to connect the handrail and the fixed deck side and deforms as the deck portion slides, so the deck portion is outward. When sliding, the side handrail functions as a handrail, further enhancing the safety of the deck.

  According to the nineteenth aspect of the present invention, when the movable deck moves from the fixed deck side to the tunnel excavation wall surface side, the handrail stands up from the fixed deck side toward the tunnel excavation wall surface side, and the movable deck is tunnel excavated. Since the handrail tilts from the tunnel excavation wall surface side to the fixed deck side when moving from the wall surface side to the fixed deck side, the space required for deformation is small, and therefore the shield machine has a large diameter. Of course, it is possible to realize a movable deck that can be installed even in the case of a small diameter.

  According to the twentieth aspect of the present invention, since the lock mechanism for holding the handrail in the standing state is provided, the handrail in the standing state can be reliably held, and thus the safety is further improved.

  According to the twenty-first aspect of the present invention, since the lock mechanism performs the locked state and the unlocked state in conjunction with the movement of the movable deck, the lock mechanism is automatically locked and unlocked when necessary. Therefore, the operator does not need to be aware of the handrail lock, which is convenient.

  Since the shield machine according to the twenty-second aspect of the present invention includes the movable deck according to any one of the thirteenth to twenty-first aspects, the effects exhibited by the thirteenth to twenty-first aspects can be achieved. A shield machine equipped with a movable deck can be realized.

  In the shield machine according to the twenty-third aspect of the present invention, the movable deck includes a handrail that can tilt in a plane intersecting the excavation direction, and when the erector device performs the normal speed turning operation, When the movable deck and the handrail are arranged at positions that do not interfere with the turning operation of the erector device, and when the erector device is not turning at the normal speed, the movable deck moves from the fixed deck side to the tunnel excavation wall surface side. Since it is movable and configured so that the handrail can stand from the fixed deck side toward the tunnel excavation wall surface side, there is no risk that the movable deck and the handrail interfere with the elector device at any time, Accordingly, the movable deck and the handrail can be accurately interlocked with the operation of the elector apparatus without hindering the turning operation of the elector apparatus.

  It should be noted that the movable deck and the handrail are arranged at positions that do not interfere with the turning operation of the erector device when the erector device is turning at the normal speed. This is substantially synonymous with the fact that the deck and the handrail are arranged on the inner side of the swivel range of the elector device (particularly, the transport device that swivels and transports the segment). In order for the movable deck and the handrail to be arranged at a position that does not interfere with the turning operation of the erector device when the erector device is turning at a normal speed, the state that the movable deck is completely moved to the fixed deck side and It is not necessary until the handrail is completely tilted to the fixed deck side, and even if the movable deck is not completely moved to the fixed deck side, or the handrail is completely tilted to the fixed deck side. Even if it is not necessary, it is sufficient that the movable deck and the handrail are arranged at positions where they do not interfere with the turning operation of the erector apparatus, which is within the range of the twenty-third aspect of the present invention.

  In addition, the movable deck can move from the fixed deck side to the tunnel excavation wall surface side and the handrail can stand from the fixed deck side toward the tunnel excavation wall surface side when the erector device is not rotating at the normal speed. In fact, it is not necessary until the movable deck is moved from the fixed deck side to the tunnel excavation wall surface side, and the handrail stands up from the fixed deck side toward the tunnel excavation wall surface side, It is sufficient that the movable deck is in a state where it can move from the fixed deck side to the tunnel excavation wall surface side, and the handrail can stand up from the fixed deck side toward the tunnel excavation wall surface side. It is within the range of the 23rd form.

  Other effects achieved by the embodiments of the present invention and effects achieved by the other aspects of the present invention will be described in the embodiments of the present invention.

It is explanatory drawing of the movable deck which concerns on one embodiment of this invention. It is operation | movement explanatory drawing of the movable deck which concerns on one embodiment of this invention. It is operation | movement explanatory drawing of the movable deck which concerns on one embodiment of this invention. It is operation | movement explanatory drawing of the movable deck which concerns on one embodiment of this invention. It is operation | movement explanatory drawing of the movable deck which concerns on one embodiment of this invention. It is operation | movement explanatory drawing of the movable deck which concerns on one embodiment of this invention. It is a top view inside the shield machine which concerns on one embodiment of this invention. It is a side view inside the shield machine which concerns on one embodiment of this invention. It is a perspective view inside a shield machine according to an embodiment of the present invention. It is explanatory drawing of an erector apparatus. It is explanatory drawing of the movable deck which concerns on other embodiment of this invention. It is operation | movement explanatory drawing of the movable deck which concerns on other embodiment of this invention. It is operation | movement explanatory drawing of the movable deck which concerns on other embodiment of this invention. It is operation | movement explanatory drawing of the movable deck which concerns on other embodiment of this invention. It is operation | movement explanatory drawing of the movable deck which concerns on other embodiment of this invention. It is a top view inside a shield machine according to another embodiment of the present invention. It is a side view inside a shield machine according to another embodiment of the present invention. It is a perspective view inside a shield machine according to another embodiment of the present invention. It is a top view inside the other aspect of the shield machine which concerns on other embodiment of this invention. It is an internal side view of the other aspect of the shield machine which concerns on other embodiment of this invention. It is explanatory drawing of the construction process of the shield machine provided with the movable deck which concerns on other embodiment of this invention. It is explanatory drawing of the construction process of the shield machine provided with the movable deck which concerns on other embodiment of this invention. It is explanatory drawing of the movable deck which concerns on other embodiment of this invention. It is explanatory drawing which expands and shows the A section which is a part of movable deck shown to Fig.23 (a). FIG. 25 is an explanatory view showing a part of the movable deck shown in FIG. 24 at a different angle. FIG. 25 (a) shows a state seen from the direction of arrow A in FIG. 24 (a), and FIG. Shows a state viewed from the direction of arrow B in FIG. It is explanatory drawing which expands and shows the B section which is a part of movable deck shown in FIG.23 (b). It is arrow AA sectional drawing of FIG.26 (b). It is operation | movement explanatory drawing of the movable deck which concerns on other embodiment of this invention. It is explanatory drawing which showed the state which looked at a part of movable deck shown to FIG.28 (b) (c) from the side surface side. It is a top view inside a shield machine according to another embodiment of the present invention. It is a side view inside a shield machine according to another embodiment of the present invention. It is a perspective view inside a shield machine according to another embodiment of the present invention. It is explanatory drawing of an erector apparatus. It is explanatory drawing explaining the effect | action of the movable deck which concerns on other embodiment of this invention, and is explanatory drawing which shows the relationship between a movable deck and the turning range of an elector apparatus. It is explanatory drawing of the other aspect of the movable deck which concerns on other embodiment of this invention. It is explanatory drawing of the other aspect of the movable deck which concerns on other embodiment of this invention. It is explanatory drawing of the other aspect of the movable deck which concerns on other embodiment of this invention.

In the following description, description will be made with reference to the drawings as necessary, but in the respective drawings, the same parts or corresponding or common parts are denoted by common reference numerals, and some explanations may be omitted.
Needless to say, the present invention is not limited to the embodiments and examples described in the drawings. The technical scope of the present invention is not limited by these embodiments, and can be implemented in various forms without changing the gist of the invention. Further, the technical scope of the present invention extends to an equivalent range, and the definition of the term relating to the present invention does not preclude its equivalent application.

[Embodiment 1]
In this embodiment, as one aspect of the movable deck according to the present invention “configured so that it can be deformed”, the deck portion (working table portion) of the movable deck is perpendicular to the traveling direction of the shield machine. The figure shows that the handrail slides in the direction and folds into and out of the turning range of the erector apparatus.

1 to 5 are explanatory diagrams of the movable deck according to the embodiment of the present invention, and FIG. 7 is an explanatory diagram for explaining the internal structure of the shield machine equipped with the movable deck of the present embodiment. FIG. 8 is a side view of the shield machine equipped with the movable deck of the present embodiment, and FIG. 9 is a perspective view showing the internal structure of the shield machine equipped with the movable deck of the present embodiment. It is.
In the following, prior to the description of the movable deck, the internal structure of the shield machine will be described based on FIGS. 7 to 9, and then the movable deck will be described.
In the following description, “front” and “front” indicating the direction indicate the traveling direction of the shield machine, and “rear” and “rear” indicate the opposite.
Further, “outer” and “outer” used to indicate the moving direction of the movable deck are directions from the shield machine side to the excavation wall surface side, and “inner” and “inward” are the opposite.

The shield machine 1 includes a front body portion 3 and a rear body portion 5. A cutter head 7 is provided at the front end of the front body 3. A shield jack 9 for propelling the shield machine 1 is installed from the rear part of the front trunk part 3 to the rear trunk part 5. And immediately behind this shield jack 9, there is provided an erector device 11 that holds the segment 10 and transports it to a desired position (see FIG. 10). The erector apparatus 11 includes a grip portion 13 that grips a segment, and an arm portion 15 that moves the grip portion 13 to a desired position.
A fixed deck 17 is installed behind the erector device 11. And the movable deck 19 is installed in the upper part of this fixed deck 17, and the both sides of the part near the front.
The movable deck 19 is installed at a position that does not interfere with the turning range on the inner side of the turning range of the arm portion 15 of the erector apparatus 11 so that it can be easily estimated from the arrangement of FIG.

  The movable deck 19 is configured to be slidable in a direction orthogonal to the traveling direction of the shield machine 1. In FIG. 7, the movable deck 19 on one side moves outward and the other is inward. The state moved to is shown. In FIG. 7, the left movable deck 19 is moved outward from the rear to the front of the shield machine 1, and the right movable deck 19 is moved inward. In FIG. 7, the structure of the movable deck 19 is shown in a simplified manner.

  As understood from the above description, the movable deck 19 is installed on the fixed deck 17 in the rear trunk portion 5 of the shield machine 1 and is located at a position that does not interfere with the turning range inside the turning range of the erector device 11. Since it is arrange | positioned, according to the operating condition of the elector apparatus 11, it enters into the turning range of the elector apparatus 11, and comes out.

Next, based on FIG. 1, the structure of the movable deck 19 of this Embodiment is demonstrated. FIG. 1 shows a state in which the movable deck 19 is moved outward. FIG. 1 (a) is a perspective view and FIG. 1 (b) is a side view. Note that FIGS. 2 to 4 are appropriately referred to when necessary to clarify the explanation.
The movable deck 19 includes a deck portion 21 that can slide inward and outward, and a folding handrail 23 that performs a folding operation in conjunction with the sliding of the deck portion 21.
The deck unit 21 includes a guide rail 25 installed on the fixed deck 17, a rectangular deck frame 27 installed on both sides of the guide rail 25 so as to be slidable inward and outward, and an inner frame of the deck frame 27. Is provided with a deck plate 29 serving as a work table.
On both sides of the deck frame 27, a first roller 31 is installed at a position closer to the outside (see FIG. 1B), and a second roller 33 is installed at a middle position (FIG. 1 ( a)).
In addition, a hook-like portion 35 that opens outward is formed at the outer end portions on both sides of the deck frame 27, and an inclined portion 37 that is inclined downward is formed on the outer end side of the hook-like portion 35. (See FIG. 4).
Further, a jack (not shown) for driving the deck frame 27 inward and outward is provided on the fixed deck 17 side.

The foldable handrail 23 includes a pair of column members 39 erected on the fixed deck 17 so as to sandwich the deck portion 21, and a pair of inner end sides rotatably connected to upper ends of the pair of column members 39. A side upper arm 41, a side lower arm 43 whose inner end is rotatably connected to the fixed deck 17, and a pivot shaft on the outer end side of the pair of side upper arm 41 and side lower arm 43. The pair of side upper arm 41 and side lower arm 43, and the front frame 45 constitute a link mechanism.
The pair of column members 39 are provided with horizontal bars 47 that connect the two so as to cross the deck portion 21. The horizontal bar 47 has a function of ensuring the rigidity of the deck portion 21 and a function of preventing the deck portion 21 from being lifted. In addition to these functions, the deck portion 21 is completely moved inward. It also functions as a safety fence that prevents workers from inadvertently leaving the deck portion 21 (see FIG. 2A).
An arm portion 49 is provided at a position closer to the inner end than the center of the side upper arm 41 and extends downward in a direction perpendicular to the axis of the side upper arm 41.
Further, the front frame 45 is connected to the outer ends of the pair of side upper arm 41 and side lower arm 43, and to the upper side portion of the rectangular portion, and is inverted U-shaped. An inverted U-shaped frame portion 45b is provided. And the 3rd roller 51 is installed in the both sides of the lower side of the rectangular frame part 45a (refer Fig.1 (a)).

2 to 5 are operation explanatory views for explaining the operation of the movable deck 19 configured as described above. FIG. 2 is a diagram in which the deck portion 21 is moved inward and the folding handrail 23 is folded. Indicates the state. 3 and subsequent figures show the state in which the deck portion 21 slides outward from the state of FIG. 2, and the state of FIG. 5 is folded as the deck portion 21 has completely moved outward as in FIG. The state in which the handrail 23 is assembled (installed state) is shown.
Hereinafter, the operation of the movable deck 19 will be described with reference to FIGS.

As shown in FIG. 2, when the deck portion 21 is in an inwardly moved state, both the upper side arm 41 on the side and the lower arm 43 on the side are directed obliquely outward, and the whole is folded. It is in. In this state, as shown in FIG. 2B, the first roller 31 provided on the deck frame 27 is in contact with a portion near the inner end of the side upper arm 41.
In the state shown in FIG. 2, the entire movable deck 19 is in a position that does not interfere with the turning range inside the turning range of the elector device 11, and does not interfere with the elector device 11.

  When the deck portion 21 is moved outward by a jack (not shown) from the state shown in FIG. 2, the side upper arm 41 is pushed by the first roller 31 to rotate the inner end side as shown in FIG. It rotates as a fulcrum. When the side upper arm 41 rotates, the front frame 45 connected thereto is lifted, and the side lower arm connected to the front frame 45 rotates using the inner end side as a fulcrum of rotation. By such an operation, the foldable handrail 23 is folded so that the whole becomes a rectangular frame shape as shown in FIG.

When the deck portion 21 moves outward to some extent, as shown in FIG. 4, the second roller 33 comes into contact with the surface on the fixed deck side of the arm portion 49 installed on the side upper arm 41, and the second roller 33 By pressing the arm portion 49, the side upper arm 41 further rotates. The lower end portion of the arm portion 49 is formed in an arc shape as shown in FIG. 4B, and as the deck portion 21 moves outward, the second roller 33 wraps around the lower end portion of the arm portion 49, Since the arm portion 49 is pushed up, the side upper arm 41 further rotates.
And if the deck part 21 moves further outward, the inclined part 37 formed in the outer end part of the deck frame 27 and the 3rd roller 51 installed in the lower part of the front part frame 45 contact | abut. When the deck portion 21 further moves outward, the third roller 51 rises up the inclined portion 37 at the outer end of the deck frame 27 and is inserted into the bowl-shaped portion 35 to complete the operation (see FIG. 5).

  In this state, as shown in FIG. 5, the folding handrail 23 is completely folded, that is, assembled, and the side upper arms 41 are arranged on both sides of the deck portion 21 so as to surround the deck portion 21. Thus, the front frame 45 is installed at the front end of the deck unit 21. That is, the side upper stage arm 41 constitutes a side handrail, and the front frame 45 constitutes a front handrail. The front frame 45 has a two-stage structure of a rectangular frame portion 45a and an inverted U-shaped frame portion 45b. Since the front frame 45 has a height, the operator can be reliably prevented from falling.

  In the state shown in FIG. 5, the worker works on the deck portion 21. At this time, the third roller 51 of the front frame 45 is inserted into the hook-shaped portion 35 at the tip of the deck frame 27. Even if the operator leans on the front frame 45, the front frame 45 does not become unstable. On the contrary, when the deck frame 27 is not completely moved outward, that is, when the third roller 51 is not inserted into the bowl-shaped portion 35 at the tip of the deck frame 27, the operator is notified of this. It is desirable to provide an alarm means.

Next, the operation of moving the movable deck 19 configured as described above inward from the state shown in FIG. 5 and returning it to the state shown in FIG. 2 will be described. The operation in this case is the reverse of the operation shown in FIGS. That is, when the deck portion 21 is moved inward from the state shown in FIG. 5, the third roller 51 comes out of the hook-like portion 35 at the tip of the deck frame 27, and the third roller 51 comes out of the hook-like portion 35. As shown in FIG. 4, the lower portion of the arm portion 49 contacts the second roller 33 to support the side upper arm 41. When the deck portion 21 further moves inward, the second roller 33 moves along the lower end portion of the arm portion 49. According to such an operation, the folding handrail 23 is gradually folded with its outer end side turning downward.
And if the deck part 21 moves further inward, the 1st roller 31 will contact | abut to the side upper stage arm 41, and will support this next. Then, the first roller 31 moves inward while supporting the side upper arm 41, and finally the state shown in FIG. 2 is obtained.

In the state of FIG. 2, the horizontal bar 47 functions as a safety fence. However, in order to add a function as a safety fence, for example, a holding portion is provided in the column member 39, and a handrail is manually attached to the holding portion. Just plug it in.
In the state of FIG. 2, the folding handrail 23 is within the turning range of the erector apparatus 11 and does not interfere with the erector apparatus 11.

  FIG. 6 is a diagram in which (b) views of FIGS. 2 to 6 are arranged in order from the top as (A) to (D), and the folding handrail 23 rotates and the movable deck 19 is arranged. It is explanatory drawing explaining that is performing deformation | transformation operation | movement. Hereinafter, the folding operation of the folding handrail 23 and the deformation operation of the movable deck 19 will be described.

<Operation of folding handrail>
1. Side as pivoting operation The upper arm 41 on the side part of the folding handrail 23 has an inner end side pivotably connected to a column member 39 erected on the fixed deck 17 side as a pivot for pivoting, Rotating operation is performed so that the outer end side draws a circular arc track. Further, the side lower arm 43 performs a rotation operation so that the inner end side rotatably connected to the fixed deck 17 side is a fulcrum of rotation and the outer end side draws an arc track. Since the front frame 45 is rotatably connected to the outer end sides of the side upper stage arm 41 and the side lower stage arm 43, if the fixed deck 17 side including the column member 39 is viewed as a fixed link, the front frame 45 The entire folding handrail 23 composed of the links of the frame 45, the side upper arm 41, and the side lower arm 43 rotates as shown by the arrow P in FIG. It can be seen that it is moving.
The folding handrail 23 performs the above-described pivoting operation according to the sliding operation in which the deck unit 21 moves in the outer and inner directions indicated by the arrow Q in FIG.

2. Side as Translational Movement Operation The folding operation of the folding handrail 23 described in the above 1 is also an operation having a component that horizontally moves between the shield machine and the tunnel wall surface excavated thereby. That is, when the operation of the handrail 23 accompanying the slide operation of the deck portion 21 as indicated by the arrow Q in FIG. 6A is projected in the horizontal direction, the operation moves in the horizontal direction within the range indicated by the arrow R in FIG. This is accompanied by movement in the horizontal direction (especially the horizontal direction between the shield machine and the tunnel wall surface excavated thereby). In short, the foldable handrail 23 moves the deck portion 21 in an outward / inward direction indicated by an arrow Q in FIG. 6A in an operation accompanied by a horizontal movement component as indicated by an arrow R in FIG. Perform according to the sliding motion.

<About the deformation of the movable deck>
As described above, the movable deck 19 includes the deck portion 21 and the folding handrail 23. The foldable handrail 23 rotates as a whole as described above, and performs a deforming operation of being folded or folded along with the rotating operation. Further, the deck portion 21 moves in the outer and inner directions indicated by the arrow Q in FIG. Accordingly, when viewed as the entire movable deck 19, the folding handrail 23 is deformed in accordance with the movement operation of the deck portion 21, and can be deformed so as not to interfere with the erector apparatus as a whole.

<Interlocking with the slide operation of the deck>
As described above, the folding operation of the folding handrail 23 as indicated by the arrow P in FIG. 6A and the deformation operation of the movable deck that is folded or unfolded with the rotation operation. Occurs in conjunction with the sliding operation of the deck portion 21 as indicated by the arrow Q in FIG.
The movement operation accompanied by the horizontal movement component of the folding handrail 23 as indicated by the arrow R in FIG. 6D also occurs in conjunction with the sliding operation of the deck portion 21 as indicated by the arrow Q in FIG. .

As described above, according to the movable deck 19 of the present embodiment, when the movable deck 19 moves outward, the folding handrail 23 is assembled in conjunction with the operation, and the movable deck 19 is inward. Since the folding handrail 23 is moved or folded in conjunction with the movement when moving to the position, the space required for the deformation can be reduced. Therefore, it is possible to realize a movable deck that can be installed even when the shield machine has a large diameter as well as a small diameter.
Moreover, according to the movable deck 19 of this Embodiment, the installation or removal operation | movement of a handrail becomes unnecessary. In other words, it is equipped with a folding handrail 23 that is automatically installed in conjunction with the operation of the movable deck 19 without using a special actuator, etc. A handrail is set when 19 is used, and the safety when using the movable deck 19 is improved. In addition, since the actuator is not used for the operation of the handrail, the risk of occurrence of those failures is low, and it can be installed in a compact space as in the past.
Furthermore, the foldable handrail 23 of the present embodiment rotates in the plane perpendicular to the traveling direction of the shield machine 1 with the inner end side as a fulcrum. Therefore, it is possible to reliably avoid interference with the erector apparatus 11.

In addition, as operation | movement of the electre apparatus 11, when performing turning operation | movement at the speed | rate at the time of normal work (normal speed turning operation | movement) like performing segment assembly operation | movement, operation | movement slower than normal speed turning operation | movement is performed. Slow turn operation can be performed. For this reason, it is desirable for safety to associate the operation of the erector apparatus with the operation of the movable deck 19.
As a specific means for that purpose, the retracted state of the movable deck 19 (the state where the movable deck 19 has moved most inward) is monitored by a limit switch. It is only necessary to program the interlock so as to allow the control and to control based on this program. In this way, the movable deck 19 starts to move outward, and when the limit switch is turned off, the interlock works on the side of the elector device 11 and the elector device 11 stops.
Further, in order to further increase the safety, in addition to the above control, an interlock is programmed on the movable deck 19 side, and the movable deck 19 is controlled not to operate when the erector apparatus 11 is performing the normal speed turning operation. do it.

  By providing the movable deck 19 according to the first embodiment, a shield machine (for example, a small space occupied by the movable deck and a safe shield machine) that exhibits the effects of the movable deck 19 described above is realized. can do.

[Embodiment 2]
In the present embodiment, as one aspect of the movable deck according to the present invention “configured so that it can be deformed”, the deck portion (working table portion) of the movable deck is within a plane that intersects the traveling direction of the shield machine. It shows what the handrail folds and moves in and out of the turning range of the erector apparatus while rotating.
FIGS. 11 to 15 are explanatory diagrams of the movable deck according to the embodiment of the present invention, and FIG. 16 is an explanatory diagram illustrating the internal structure of the shield machine equipped with the movable deck of the present embodiment. FIG. 17 is a side view of the shield machine equipped with the movable deck according to the present embodiment, and FIG. 18 is the interior of the shield machine (rear trunk) equipped with the movable deck according to the present embodiment. It is a perspective view which shows a structure.
In the following, in order to explain where the movable deck is arranged in the shield machine, the internal structure of the shield machine will be described based on FIGS. 16 to 18 prior to the explanation of the movable deck. Then, the movable deck will be described.

The shield machine 61 includes a front body portion 63 and a rear body portion 65. A cutter head 67 is provided at the front end of the front body portion 63. A shield jack 69 for propelling the shield machine 61 is installed from the rear part of the front trunk part 63 to the rear trunk part 65. And immediately behind the shield jack 69, there is provided an erector device 71 that holds the segment 70 and transports and installs it to a desired position (see FIG. 10). The erector device 71 includes a gripping portion 73 that grips the segment 70 and an arm portion 75 that moves the gripping portion 73 to a desired position.
A fixed deck 77 is installed behind the erector device 71. A movable deck 79 is installed on both sides of the upper portion of the fixed deck 77 and the front side.
The movable deck 79 is installed at a position that does not interfere with the turning range inside the turning range of the arm portion 75 of the erector device 71 so that it can be easily inferred from the arrangement of FIG.

The movable deck 79 is configured to be rotatable in a plane orthogonal to the traveling direction of the shield machine 61. In FIG. 16, the movable deck 79 set on the left side from the rear to the front of the shield machine 61 is in a horizontal state and can be used, and the right movable deck 79 has the tip side on the lower side. It is in a state where it cannot be used by rotating so as to face.
In FIG. 16, the structure of the movable deck 79 is shown in a simplified manner.

  As understood from the above description, the movable deck 79 is installed on the fixed deck 77 in the rear trunk portion 65 of the shield machine 61 and is located at a position that does not interfere with the turning range inside the turning range of the erector device 71. Since it is arranged, it enters or exits the turning range of the erector device 71 according to the operating status of the erector device 71.

  Next, the structure of the movable deck 79 of the present embodiment will be described based on FIG. FIG. 11 shows a state in which the movable deck 79 projects outward, and FIG. 11A is a perspective view and FIG. 11B is a side view. Note that FIGS. 12 to 14 are appropriately referred to when necessary for the description.

The movable deck 79 is attached to the fixed deck 77 via a bracket 80 installed on the fixed deck 77. The bracket 80 for attaching the movable deck 79 to the fixed deck 77 is formed in a substantially rectangular frame shape, the upper side is fixed to the upper surface of the fixed deck 77, and the lower side is attached to the outer side of the fixed deck 77. Is installed.
Note that the movable deck 79 may not be attached via the bracket 80 as shown in this example, but may be substituted if there is a member or the like for attaching the movable deck 79 to the fixed deck 77 side.

The movable deck 79 includes a deck portion 81 that is rotatable in a plane substantially orthogonal to the traveling direction of the shield machine 61, a folding handrail 83 that performs a folding operation in conjunction with the rotation of the deck portion 81, and a deck. And a drive mechanism unit 85 that drives the rotation of the unit 81.
The deck unit 81 includes a rectangular deck frame 87 and a deck plate 89 that is installed in the frame of the deck frame 87 and serves as a work table. The deck portion 81 is attached to the bracket 80 by rotatably installing both end portions of the deck frame 87 at a position slightly above the middle of the vertical side of the bracket 80.

The folding handrail 83 includes a side handrail 91 disposed on both sides of the deck portion 81, and a front handrail 93 provided on the front portion of the deck portion 81. The side handrail 91 is configured by a pair of tube members having one end side rotatably connected to the upper end portion of the bracket 80 and the other end side pin-connected to the front handrail 93. The front handrail 93 is formed of a tube member like the side handrail 91, and a rectangular frame portion 95 whose lower end is rotatably attached to the tip end side of the deck frame 87, and an inverted U-shape on the upper side of the rectangular frame portion 95. The reverse U-shaped part 97 formed in the above is connected.
The folding handrail 83 configured as described above surrounds both sides and the front portion of the deck portion 81 so that an operator on the deck portion 81 can be prevented from falling from the deck portion 81.

The drive mechanism portion 85 has a rectangular frame-shaped first drive frame member 99 whose base end side is rotatably attached to the lower portion of the bracket 80, and one end side of the first drive frame member 99 is rotatably connected to the distal end side of the first drive frame member 99. The second drive frame member 101 having a rectangular frame shape whose other end side is rotatably connected to the front end side of the deck frame 87, and the main body 103 are rotatably attached to the bracket 80, and the front end of the rod 105 is The first drive frame member 99 is provided with a pair of drive jacks 107 connected via a rotation shaft.
The drive mechanism 85 configured in this manner rotates the first drive frame member 99 by extending and contracting the rod 105 of the drive jack 107, and the second drive frame member 101 is interlocked with this, Further, the deck portion 81 is rotated in conjunction with the rotation of the second drive frame member 101, and the folding and folding operation of the folding handrail 83 is performed.

12 to 15 are operation explanatory views for explaining the operation of the movable deck 79 configured as described above. FIG. 12 shows the state in which the front end side of the deck portion 81 faces obliquely downward and the folding handrail 83 is folded. Indicates the state. 13 and subsequent figures show a state in which the deck portion 81 is rotated from the state of FIG. 12, and the state of FIG. 14 is the deck portion 81 being used with the deck portion 81 being substantially horizontal as in FIG. A state in which the folding handrail 83 is assembled (installed state) is shown. FIG. 15 continuously shows the side views shown in FIGS.
Hereinafter, the operation of the movable deck 79 will be described with reference to FIGS.

  As shown in FIG. 12, when the front end side of the deck portion 81 is in a state of facing obliquely downward, the folding handrail 83 is in a folded state. In this state, the entire deck unit 81 is disposed close to the side of the fixed deck 77. Further, the front handrail 93 and the side handrail 91 in the foldable handrail 83 are arranged close to each other so as to fall over the deck plate 89 of the deck portion 81. Therefore, in the state shown in FIG. 12, the entire movable handrail is disposed so as to stick to the side surface of the fixed deck 77, is located inside the turning range of the elector device 71, and does not interfere with the elector device 71.

When the rod 105 of the drive jack 107 is extended from the state shown in FIG. 12, the first drive frame member 99 rotates in the direction indicated by the arrow A in FIG. Operates to be extruded. Further, the second drive frame member 101 is entirely pushed outward in conjunction with the operation of the first drive frame member 99, and is indicated by an arrow B in FIG. Rotate in the direction. Further, in conjunction with the operation of the second drive frame member 101, the deck portion 81 rotates in the direction indicated by the arrow C in FIG. Further, when the deck portion 81 is rotated, the front handrail 93 connected thereto is rotated in the direction indicated by the arrow D in FIG. 13B with the lower end side as a fulcrum of rotation. The side handrail 91 rotates in the direction indicated by the arrow E in FIG.
That is, when the rod 105 of the drive jack 107 starts to extend, the deck portion 81 starts to protrude, and the folding handrail 83 has a rectangular frame surrounding the deck portion 81 as shown in FIG. It will be assembled into a shape.

  Further, when the rod 105 of the drive jack 107 is extended, each member constituting the movable deck 79 further rotates from the state shown in FIG. Then, as shown in FIG. 14, the deck portion 81 becomes substantially horizontal, the front handrail 93 rises vertically, and the side handrail 91 becomes substantially horizontal. In this state, the folding handrail 83 is fully folded, that is, assembled, side handrails 91 are installed on both sides of the deck portion 81, and a front handrail 93 is installed on the front end of the deck portion 81. Thus, the deck portion 81 is surrounded. The front handrail 93 has a two-stage structure of a rectangular frame portion and an inverted U-shaped frame portion, and has a height, so that the operator can be reliably prevented from falling.

When an operator gets on the deck portion 81 in this state, the force acting on the deck portion 81 acts to rotate the second drive frame member 101 and the first drive frame member 99. Therefore, it is necessary to provide a stopper for preventing these members from rotating.
In the present embodiment, as shown in FIG. 14B, the outer angle α formed by the first drive frame member 99 and the second drive frame member 101 is set to exceed 180 °. When an operator rides on the deck portion 81, a load is applied to the first drive frame member 99 via the second drive frame member 101. The direction of the acting force causes the first drive frame member 99 to be changed as shown in FIG. It becomes the direction shown by arrow A in b), which is the direction in which the rod 105 of the drive jack 107 is extended. Accordingly, if the rod 105 of the drive jack 107 is set to the maximum extension in the state shown in FIG. 14, the rod 105 does not extend any further, and the rod 105 restricts the rotation of the first drive frame member 99. Functions as a stopper. Therefore, even if a problem such as an oil leak from a hydraulic hose occurs, the movable deck 79 does not rotate and is safe.
In the present embodiment, since the rod 105 of the drive jack 107 is set to the maximum extension in the state in which the deck portion 81 of the movable deck 79 is horizontal as shown in FIG. There is no need to provide it. Of course, a mechanical stopper for restricting the rotation between the members constituting the drive mechanism portion 85 in a state where the deck portion 81 is set horizontally may be provided. Increase.

In addition, when the movable deck 79 is stopped in the middle of the overhanging operation, it is dangerous because the folding handrail 83 is not sufficiently installed or the deck portion 81 is inclined. It is desirable to provide a safety mechanism as shown.
<Safety mechanism>
A limit switch (hereinafter referred to as “LS”) capable of detecting the “deck extension completion state” is provided in the drive jack 107 or the movable deck 79 main body, and the procedure for use is performed as follows.
(i) An operator instructs an extension operation of the movable deck 79 by pressing an operation switch, for example.
(ii) The drive jack 107 starts a predetermined operation (generally a rod extension operation).
(iii) When the LS is detected, the drive jack 107 automatically stops the predetermined operation, and at the same time, the operation completion notifying device (or lamp) installed separately "moves the movable deck over" Give a signal to let you know. Note that the operation completion notification may be “voice (including buzzer sound)” or “combination of voice and rotating lamp rotation (visual display)”.
(iv) An operator (a person who gets into the movable deck 79) gets on the work deck after confirming the above three signals.
It should be noted that another safety fence (handrail) is provided near the entrance of the movable deck 79 so that the safety fence can be automatically opened after “extension is completed” or the safety fence is automatically unlocked. Alternatively, the safety fence may be opened manually.

Next, the operation of rotating the movable deck 79 configured as described above from the state shown in FIG. 14 to the fixed deck 77 side to return to the state shown in FIG. 12 will be described. The operation in this case is the reverse of the operations shown in FIGS. That is, when the rod 105 of the drive jack 107 is retracted from the state shown in FIG. 14, each member of the first drive frame member 99, the second drive frame member 101, the deck portion 81, the front handrail 93, and the side handrail 91. Are rotated in directions opposite to the arrows A to E shown in FIG. In accordance with such a turning operation, the deck portion 81 approaches the fixed deck 77 side, and the folding handrail 83 is also folded toward the deck portion 81 side and close to the fixed deck 77 side together with the deck portion 81. Finally, the state shown in FIG. 12 is obtained.
In the state of FIG. 12, the movable deck 79 is within the turning range of the erector device 71 and does not interfere with the erector device 71.

  FIG. 15 is a diagram in which (b) views of FIGS. 12 to 14 are arranged in order from the top as (A) to (C), and the deck portion 81 performs a rotation operation, and the folding handrail 83 is provided. FIG. 6 is an explanatory diagram for explaining a situation in which the door is folded and installed in conjunction with the turning operation of the deck portion 81.

<About the operation of the deck>
1. As described above, the side surface deck portion 81 is pivotally connected to the bracket 80 so as to be pivotable, and the connecting portion serves as a pivot point in the direction indicated by the arrow C in FIG. Rotate.
In FIG. 15B, arrows are attached to both ends of the arrow C in order to show that it can be rotated in both directions in the state of FIG. The same applies to arrows D and E described later.
2. Side surface as translational movement operation When the rotation operation of the deck portion 81 described in the above 1 is projected in the horizontal direction, the operation is generally in the horizontal direction (particularly in the shield machine) in the range indicated by the arrow S in FIG. And the tunnel wall surface excavated thereby, or a moving operation in the horizontal direction in which the fixed deck 17 is separated or approached.
In short, the deck unit 81 performs an operation with a horizontal movement component in accordance with the rotation operation.

<Operation of folding handrail>
1. Side as pivoting operation The front handrail 93 that constitutes the folding handrail 83 is pivotally connected to the second drive frame member 101 of the drive mechanism section 85 at the lower end side, and the deck section 81 pivots. Rotate in the direction indicated by arrow D in FIG.
Further, the side handrail 91 rotates in the direction indicated by the arrow E in FIG. Since the folding handrail 83 is composed of the front handrail 93 and the side handrail 91, it can be seen that the folding handrail 83 is rotating as a whole.
The turning operation of the front handrail 93 and the side handrail 91 is an operation in a plane that intersects the deck surface of the fixed deck 17 or a plane that intersects the digging direction of the shield machine.

2. Side as translational movement The movement of the side handrail 91 described in the above 1 moves horizontally between the shield machine and the tunnel wall excavated by it or so as to separate or approach the fixed deck 17. It is also an operation having a component. That is, the side handrail 91 is rotated as indicated by an arrow E in FIG. 15 as the deck portion 81 is rotated as indicated by an arrow C in FIG. When this pivoting movement of the handrail 91 is projected in the horizontal direction, the horizontal direction in the range indicated by the arrow S in FIG. 15C (particularly the horizontal direction between the shield machine and the tunnel wall surface excavated thereby) Alternatively, the moving operation is performed in a horizontal direction that is separated from or approaching the fixed deck 17. The front handrail 93 is rotated as indicated by an arrow D in the drawing along with the rotation operation of the deck portion 81 as indicated by an arrow C in FIG. This involves movement in the horizontal direction between the shield machine and the tunnel wall excavated thereby, or in the horizontal direction away from or approaching the fixed deck 17. Further, the front handrail 93 moves horizontally by a distance close to the horizontal distance shown by the arrow S in FIG. 15C in accordance with the turning operation of the deck portion 81 as shown by the arrow C in FIG. In short, both the handrails 91 and 93 constituting the foldable handrail 83 perform an operation accompanied by a horizontal movement component in accordance with the rotation operation of the deck portion 81.

<Interlocking with the operation of the deck part 81 of the folding handrail>
As described above, the movement operation or the rotation operation of the folding handrail 83 is performed in conjunction with the movement operation or the rotation operation of the deck portion 81 by the front handrail 93 directly connected to the deck portion 81. It is. The folding handrail 83 performs a folding operation and a folding operation in conjunction with the movement operation or the rotation operation. Therefore, the folding handrail 83 moves or rotates in conjunction with the movement operation or the rotation operation of the deck portion 81 and performs the folding operation.
Further, as described above, each of the handrails 91 and 93 constituting the foldable handrail 83 performs a movement operation with a horizontal movement component in conjunction with the movement or rotation of the deck portion 81.

The movable deck 79 of the present embodiment has the following advantages.
(1) In the movable deck 79, when the deck part 81 rotates in the projecting direction or moves in the projecting direction, the folding handrail 83 is assembled in conjunction with the operation. When 81 rotates toward the fixed deck 77 side or moves in the direction opposite to the protruding direction, the folding handrail 83 is moved or folded in conjunction with the rotating operation or moving operation. Therefore, the movable deck 79 requires only a small space for deformation. Therefore, the movable deck 79 can be installed not only when the shield machine has a large diameter but also with a small diameter.

(2) In the movable deck 79, installation and removal operations of individual handrails are unnecessary. In other words, since the movable deck 79 is equipped with a folding handrail 83 that is automatically installed in conjunction with its operation, the handrail is always set when the movable deck 79 is used without the operator being aware of it. As a result, safety when using the movable deck 79 is improved. Further, since the handrail operates without using a special actuator or the like, the risk of failure of the actuator or the like is low, and it can be installed in a compact space as in the past.

(3) The movable deck 79 rotates with the fixed deck 77 side as a fulcrum in a plane perpendicular to the traveling direction of the shield machine 61 in the movable deck 79. In the state of being close to the side, the arm can be reliably placed inside the swivel range of the arm of the erector device 71, and therefore interference with the erector device 71 can be reliably avoided.

(4) Since the movable deck 79 operates so that the base end side is a pivot point and projects outward from the side surface of the fixed deck 77, the inside of the fixed deck 77 (that is, the body axis of the shield machine) The side) is not provided with the members constituting the movable deck 79. Therefore, it is not necessary to secure a space for installing the members related to the movable deck 79 on the fixed deck 77 side, and installed on the fixed deck 77 side. It is not necessary to consider interference with the member to be processed.

For example, when the shield machine 61 is a mud type, a screw conveyor is installed obliquely from the front trunk to the rear trunk of the shield machine 61, but this is not possible with the movable deck 79 of the present embodiment. There is no need to consider interference with the screw conveyor.
FIG. 19 is a plan view showing the state in which the movable deck 79 of the present embodiment is installed in the mud type shield machine 61 on which the screw conveyor 109 is installed, and FIG. It is a side view of the state which installed the movable deck 79 of the form.
As shown in FIGS. 19 and 11, since the screw conveyor 109 is disposed at the center of the shield machine 61, in the case of a sliding movable deck as shown in the conventional example, the deck portion is a fixed deck. When sliding to the 77 side, the problem of interference between the movable handrail and the screw conveyor 109 occurs, but such a problem does not occur in the movable deck 79 of the present embodiment.

(5) The movable deck 79 does not adversely affect the assembly process of the shield machine 61 even in the assembly process of the shield machine 61 in which the screw conveyor 109 is installed.
FIGS. 21 and 22 are explanatory views for explaining the assembly process of the shield machine 61 including the screw conveyor 109, and showing how the assembly proceeds in the order of (a) to (f) in the drawing.
Hereinafter, an assembly process of the shield machine 61 including the screw conveyor 109 will be outlined based on FIGS. 21 and 22.

(i) A front trunk 63 (lower front trunk 63a) (upper front barrel 63b), a cutter driving unit (not shown), a cutter head, which are divided into upper and lower parts, on a starting stand (not shown) under the start-up resistance. The majority of the front torso equipment such as 67 is thrown in for temporary assembly. FIG. 21A shows a state where the temporary assembly has been completed.
(ii) The lower rear trunk portion 65a which is the lower half of the rear trunk portion 65 of the half split structure is inserted (FIG. 21B). In consideration of welding work in the subsequent process and the entry / exit of workers, the rear torso 65 is located slightly rearward from the front torso 63, specifically, a folded portion installed in the back torso 65. A gap is formed between 66 and the front body portion 63, and the temporary placement is performed so that the gap can be welded and allow workers to enter and exit.
(iii) The screw conveyor 109 is inserted from above the rear cylinder and connected to the front cylinder side and installed (FIG. 21 (c)).
(iv) The fixed deck 77 on which the movable deck 79 is installed is inserted and temporarily fixed to the support in the lower rear trunk portion 65a (FIG. 22 (d)). Since the movable deck 79 is installed on the fixed deck 77, the relative position with respect to the fixed deck 77 does not change, but at this time, the relative position of the rear body 65 with respect to the front body 63 is behind the normal position. It is shifted to. At this time, if the movable deck 79 extends to the fixed deck 77 side like a slide type, the movable deck 79 should interfere with the screw conveyor 109 and should be installed at this time. I can't.
However, in practice, the movable deck 79 does not extend to the fixed deck 77 side, so that it does not interfere with the screw conveyor 109 and can therefore be installed in advance.

(v) Next, the upper rear barrel 65b, which is the upper half of the rear barrel 65, is inserted and temporarily fixed to the lower rear barrel 65a (FIG. 22 (e)).
(vi) After the step shown in FIG. 22 (e), the main parts of the divided parts (including the welding operation) are performed to complete the partial assembly of the front and rear body parts 63 and 65, and then the rear body is moved forward on the starting stand. Then, the middle bent portion 66 is inserted. At this time, the front and rear body parts 63 and 65 are in a proper relative positional relationship for the first time (FIG. 22 (f)). If the movable deck 79 is slidable, the movable deck 79 can be installed at a position where it does not interfere with the screw conveyor 109 when the front and rear torso parts 63 and 65 are in a proper relative positional relationship.

As can be seen from the description based on FIGS. 21 and 22, when the movable deck 79 extends to the fixed deck 77 side, even if the movable deck 79 does not interfere with the screw conveyor 109 in the completed state, shield digging is performed. The installation time of the machine 61 is limited due to the assembly process of the machine 61, and it is necessary to install it at the end of the local assembly process (after the front and rear cylinders are in a normal relative positional relationship). Therefore, it is necessary to remove the movable deck 79 from the fixed deck 77 at the beginning. Further, in consideration of such an assembly process, the entire movable deck is unitized in order to simplify on-site assembly work. Such considerations are also necessary.
On the other hand, since the movable deck 79 of the present embodiment does not extend to the fixed deck 77 side, it does not interfere with the screw conveyor 109 in any process of the assembly process of the shield machine 61, It can be installed at any time, and can be fixed (welded) to the fixed deck 77 before shipment from the factory, simplifying the local assembly process (shortening the construction period).

(6) Processes after assembly completion of each block of the shield machine 61 (front barrel, rear (middle) barrel, erector device, rear carriage, cutter drum, cutter disk, cutter motor, slewing bearing, shield jack, etc.) In general, (i) Temporary assembly in the factory → (ii) Factory test and witness inspection → (iii) Dismantling → (iv) Split transportation → (v) On-site assembly → (vi) On-site inspection and test operation Yes (more specifically, although there are some differences in the names and names of each process, Geotechnical Engineering / Practical Series 3 “From Investigation / Design to Construction of the Shield Method” (Correction 2nd edition, published by the Geotechnical Society of Japan) Release: Maruzen Co., Ltd.) pp. 149-155).

At this time, if it is a movable deck that interferes with the screw conveyor 109, while trying to avoid problems during assembly and disassembly due to the interference, the assembly and disassembly of the shield machine 61 is complicated. It may end up. That is, in the case of the movable deck that interferes with the screw conveyor 109, the front barrel portion 63 and the rear barrel portion 65 are connected (equipped with the fixed deck 77) in the entire temporary assembly process in the factory of (i). ) The movable deck 79 can only be installed after the relative positional relationship between the rear body 65 and the screw conveyor 109 is determined. In the dismantling step (iii), the movable deck 79 is not disassembled and removed first. The front body part 63 and the rear body part 65 cannot be disassembled (for example, relative separation). In the on-site assembly process (iv), the same procedure as the temporary assembly process in the factory in (i) is taken. Since there are many cases, the problem arises that the assembly timing of the movable deck 79 is restricted as in the case of (i) the factory temporary assembly process.
In addition, when the assembly timing of the movable deck 79 is restricted in the on-site assembly process (iv), the movable deck 79 must be disassembled and removed from the fixed deck 77 side in the previous disassembly process of (iii). It is also subject to another restriction that it must be.
When constructing a shield machine equipped with a screw conveyor 109 and a sliding movable deck, the above-mentioned problems often occur.

  On the other hand, since the movable deck 79 of the present embodiment does not interfere with the screw conveyor 109, various problems as described above do not occur. For this reason, for example, in the dismantling process of (iii), it is possible to carry in the field without dismantling the movable deck 79, so that the work process can be simplified (and thus the work period can be shortened).

  In the above description, the interference with the screw conveyor 109 during the on-site assembly is a problem. However, depending on the installation position of the screw conveyor 109, the (appropriate) installation position of the movable deck 79 may be changed even after the assembly is completed. In some cases, the screw conveyor 109 interferes. (Such a case may occur depending on various conditions such as a small-diameter shield machine, an arrangement angle of the screw conveyor 109, a work deck shape, and a segment assembly position.)

In this case, the following countermeasures can be taken.
(i) The movable deck position is shifted forward, for example, to avoid interference with the screw conveyor 109.
However, if this is done, the movable deck 79 will be displaced from the position where the movable deck 79 is originally intended to be extended (ie, the position that is efficient for the segment assembling work), and it will also be close to the erector device 71, so the usability will deteriorate.
(ii) The sliding stroke of the slide type movable deck 79 is shortened and the movable deck 79 is also made small so that it does not interfere with the screw conveyor 109 on the shield machine center side even when stored.
However, if this is done, the amount of overhang of the movable deck 79 becomes insufficient, and the usability deteriorates.
(iii) The movable deck installation position is moved upward, and the movable deck 79 is disposed at a position where it does not interfere with the screw conveyor 109.
However, because the upper space of the deck is compressed, the usability of not only the movable deck 79 but also the fixed deck 77 deteriorates.

As described above, even in the case of the sliding movable deck 79, it is possible to avoid interference with the screw conveyor 109 by taking countermeasures, but it can be said that any countermeasure is sufficient. Absent.
In this respect, if the movable deck 79 is used, the movable deck 79 does not extend to the fixed deck 77 side, and it is not necessary to take the above-mentioned countermeasures, and sacrifice the functions that the movable deck should have or should originally have. This is preferable.

  By providing the movable deck 19 according to the present embodiment, a shield machine (for example, a space shielded in a small space occupied by the movable deck and yet a safe shield machine) that exhibits the effects of the movable deck 19 described above is realized. can do.

In the second embodiment, the slide type shown in the second embodiment is given as an example in which the problem of interference with the screw conveyor 109 occurs, and such a problem does not occur in the movable deck 79 of the second embodiment. It was stated that it is suitable.
This description is intended to explain the specific effects of the second embodiment, and does not deny the effects of the first embodiment as an invention. That is, in the first embodiment, it is linked to the slide of the deck portion 21. Thus, the various effects described in the first embodiment resulting from the action of the first embodiment in which the folding handrail 23 is folded or spread (assembled) are not denied. .

[Embodiment 3]
In this embodiment, as one aspect of the movable deck according to the present invention “configured so that it can be deformed”, the deck portion (working table portion) of the movable deck is perpendicular to the traveling direction of the shield machine. It shows what slides in the direction and the handrail tilts to enter and exit the turning range of the erector apparatus.

23 to 29 are explanatory diagrams of the movable deck according to the embodiment of the present invention, and FIG. 30 is an explanatory diagram for explaining the internal structure of the shield machine equipped with the movable deck of the present embodiment. FIG. 31 is a side view of the shield machine equipped with the movable deck of the present embodiment, and FIG. 32 is a perspective view showing the internal structure of the shield machine equipped with the movable deck of the present embodiment. FIG. 33 is an explanatory diagram of the erector apparatus mounted on the shield machine, and FIG. 34 is an explanatory diagram showing the relationship between the movable deck and the turning range of the erector apparatus.
In the following, the internal structure of the shield machine will be described based on FIGS. 30 to 33 prior to the description of the movable deck, and then the movable deck will be described.

The shield machine 111 includes a front body portion 113 and a rear body portion 115. A cutter head 117 is provided at the front end of the front body portion 113. A shield jack 119 for propelling the shield machine 111 is installed from the rear portion of the front trunk portion 113 to the rear trunk portion 115. And immediately behind the shield jack 119, there is provided an erector device 121 that holds the segment 120 and transports and installs it to a desired position (see FIGS. 32 and 33). As shown in FIG. 33, the erector device 121 includes a grip portion 123 that grips a segment, and an arm portion 125 that moves the grip portion 123 to a desired position.
A fixed deck 127 is installed behind the erector device 121. And the movable deck 129 is installed in the upper part of this fixed deck 127, and both sides of the part near the front.

The movable deck 129 is configured to be slidable in a direction orthogonal to the traveling direction of the shield machine 111. Regarding the moving state of the movable deck 129, in FIG. 30, the left movable deck 129 has moved outward from the rear of the shield machine 111 toward the front, and the right movable deck 129 has moved inward. Is in a state. In FIG. 32, the left movable deck 129 is moved inward from the rear to the front of the shield machine 111, and the right movable deck 129 is moved outward.
In FIG. 30, the structure of the movable deck 129 is shown in a simplified manner.

As can be understood from the above description, the movable deck 129 is installed on the fixed deck 127 in the rear trunk portion 115 of the shield machine 111, and can move out of the turning range of the elector device 121 depending on the operating status of the elector device 121. , Is supposed to enter. That is, as shown in FIG. 34, when the movable deck 129 is moved inward like the movable deck 129 on the left side in the figure, the movable deck 129 is disposed inside the turning trajectory of the erector device 121 indicated by a two-dot chain line. In other words, it is in a state of coming out of the turning range of the erector device 121. In this state, the movable deck 129 does not interfere with the erector device 121.
On the other hand, in the state where the movable deck 129 on the right side in the drawing is extended outward, the movable deck 129 is disposed outside the turning trajectory of the erector device 121 and is in a state where the erector device 121 enters the turning range. In this state, if the erector device 121 is operated, there is a risk of interference.

Next, the structure of the movable deck 129 of this embodiment will be described with reference to FIGS. FIG. 23 is a view showing the entire movable deck 129, FIG. 23 (a) shows a state where the movable deck 129 is moved outward, and FIG. 23 (b) shows a state where the movable deck 129 is moved inward. Indicates the state.
The movable deck 129 moves in the horizontal direction as the deck portion 131 slides, a deck portion 131 slidable inward and outward, a jack (not shown) that provides driving force for moving the deck portion 131 inward and outward, and the like. A tilting handrail 133 that tilts is provided.
Further, the fixed deck 127 is provided with a rod-like flip-up piece portion 135 (see FIG. 23B) and a rod-like operation piece portion 137 (see FIG. 26) so as to protrude outward from the fixed deck 127 side. It has been. The flip-up piece 135 has a function of locking and releasing the tilting handrail 133 in an upright state in cooperation with a lock mechanism 153 to be described later. Details of the operation will be described later. The operation piece portion 137 has a function of tilting the tilting handrail 133 as the deck portion 131 moves. Details of the operation will be described later.

As shown in FIG. 23, the tilt-type handrail 133 is formed by bending and welding the pipe material so that the overall shape is substantially rectangular, and the lower end portions on both sides are pivotally attached to the outer end portions of the deck portion 131. It is attached as possible. There is a portion that extends downward from the pivoting portion at the lower end portions on both sides of the tilting handrail 133, and this portion is a portion that functions as an action point for tilting the tilting handrail 133 according to the principle of the lever as will be described later. Yes, and will be referred to as a lever portion 139 in the following description.
In the middle of the tilting type handrail 133, a horizontal bar 141 is installed on both sides, and a support bar 143 protruding inward from the middle to the lower side of both sides is installed. The support rod 143 has a function of restricting and supporting the tilting angle when the tilting handrail 133 falls inward due to the protrusion (in the example shown in FIG. 23B, an inverted triangular portion). Yes. Further, as shown in FIG. 23A, the support rod 143 protrudes toward the fixed deck 127 on both sides of the deck portion 131 when the tilting handrail 133 is in an upright state. It also has a function to prevent it from falling sideways.
The tilting handrail 133 is urged so as to always rotate in a standing direction by an urging means (not shown) such as a spring.

  The deck unit 131 includes a guide rail 145 installed on the fixed deck 127, a rectangular deck frame 147 installed on both sides of the guide rail 145 so as to be slidable inward and outward, and an inner frame of the deck frame 147. Is provided with a deck plate 148 serving as a work table. As shown in FIG. 23 (b), the deck plate 148 is accommodated when the deck portion 131 moves inward, and becomes a work table when the deck portion 131 moves outward. A cover 149 is provided. In FIG. 23A, illustration of the deck cover 149 is omitted.

At the outer end of the deck frame 147, a support portion 151 that rotatably supports the lower end portion of the tilting handrail 133, and a lock mechanism that restricts the rotation of the tilting handrail 133 so that the tilting handrail 133 is locked in an upright state. 153 is provided.
The lock mechanism 153 includes a first lock piece 155 that abuts a portion (a lever portion 139 described later) of the tilting handrail 133 that extends below the support portion 151, and a second that restricts the rotation of the first lock piece 155. A lock piece 157 is provided (see FIGS. 24 to 29).
As shown in FIG. 24A, the first lock piece 155 has a substantially rectangular shape, and is provided so that the bracket portion 159 faces the upper and lower sides. FIG. 24B shows a state in which the first lock piece 155 is removed in order to explain the internal structure of the lock mechanism 153. As shown in FIG. A horizontal piece 161 having a shaft hole is provided, and the horizontal piece 161 supports the first lock piece 155 so as to be rotatable. That is, the first lock piece 155 is installed with the bracket portion 159 supported by the horizontal piece portion 161 so as to be rotatable about the vertical axis. On the surface of the first lock piece 155 that faces the lever portion 139 of the tilting handrail 133, a contact portion 163 that contacts the tilting handrail 133 and restricts the rotation of the tilting handrail 133 (FIG. 24A). 27).
The first lock piece 155 is always urged by an urging means (for example, a spring) (not shown) so that the abutting portion 163 rotates in a direction to abut on the lever portion 139 of the tilting handrail 133.

The second lock piece 157 is formed of a substantially L-shaped member, and the base end side of the L-shaped piece is attached to the deck frame 147 so as to be rotatable around the horizontal axis. A roller 165 is provided on the leading end side (lower end) (see FIG. 24B) of the other L-shaped piece. The function of this roller 165 will be described later.
The second lock piece 157 is always urged by an urging means (for example, a spring) (not shown) so that the tip side rotates in a downward direction.
A hook-like hook-shaped member 167 is provided so as to surround both sides of the other piece of the second lock piece 157, and this is a member for preventing rattling on the tip side of the second lock piece 157. By covering the tip of the two lock pieces 157 from both sides, the second lock piece 157 is prevented from moving beyond a predetermined range.

The tilting handrail 133 is restricted from rotating by the lock mechanism 153 in the standing state shown in FIG. 23A, but the lock mechanism 153 restricts (locks) the rotation of the tilting handrail 133. The following describes how the lock state is established with respect to the state.
The state shown in FIG. 24A shows details of a state where the rotation of the tilting handrail 133 is restricted. In this state, the contact portion 163 of the first lock piece 155 is in contact with the lever portion 139 of the tilting handrail 133. At this time, the side end surface of the first lock piece 155 is in contact with the side surface of the second lock piece 157, whereby the rotation of the first lock piece 155 is restricted, and the first lock piece 155 cannot rotate. Is in a state. Thus, since the contact part 163 of the 1st lock piece 155 contact | abuts to the lever part 139 of the tilting-type handrail 133, and the 1st lock piece 155 is in a non-rotatable state, the tilting handrail 133 cannot rotate. Is in a locked state.

Next, the relationship between the lock mechanism 153 and the tilting handrail 133 when the lock mechanism 153 is unlocked and the tilting handrail 133 is tilted as shown in FIG. 27 will be described.
In the state where the tilting handrail 133 is tilted, as shown in FIGS. 26A and 27, the first lock piece 155 is rotated clockwise in FIG. 26 to the side of the lever portion 139 of the tilting handrail 133. Is located. At this time, the side end surface of the first lock piece 155 enters between the pieces of the second lock piece 157 (see FIG. 27), and therefore the first lock piece 155 can be rotated clockwise. The side end surface of the first lock piece 155 can enter between the pieces of the second lock piece 157 because the roller 165 at the tip of the second lock piece 157 rides on the flip-up piece 135 and the second lock piece 157 This is because the piece 157 is rotated upward and the L-shaped piece is in a straight state, thereby releasing the locking of the first lock piece 155 to the side end surface.

  In the tilted handrail 133, the support rod 143 is in contact with the deck cover 149 in the tilted state, and cannot tilt further. On the other hand, even if the tilting handrail 133 that is in an inclined state is erected, the lever portion 139 is in contact with the operation piece portion 137, and movement in the erection direction is also restricted. As described above, the tilting handrail 133 can stably maintain the state even in the inclined state.

Next, from the state where the movable deck 129 protrudes toward the excavation wall surface and the tilting handrail 133 stands up (see FIG. 23A), the movable deck 129 moves to the fixed deck 127 side and the tilting handrail 133 tilts. The flow of the operation to reach the state (see FIG. 23B) will be described based on FIGS. 28 and 29, particularly focusing on the operation of the lock mechanism 153.
In the overhanging state, as shown in FIG. 28A, the lever portion 139 of the tilting handrail 133 is fixed while being sandwiched between the first lock piece 155 and the tip end portion of the deck frame 147. As described above, the first lock piece 155 is pin-bonded to the deck frame 147 and can rotate in a direction in which the contact portion 163 moves away from the lever portion 139. However, in the situation of FIG. The side end surface of the first lock piece 155 is in contact with the side surface of the second lock piece 157, and the rotation is restricted by the second lock piece 157 so that the first lock piece 155 cannot rotate. Both the type handrails 133 are fixed.

Next, the movable deck 129 is slid to the fixed deck 127 side and slid to a position before reaching the retreat completion position, that is, a position slightly protruding from the retraction completion position (for example, a position protruding about 100 mm from the retraction completion position). This state is the state shown in FIGS. 28B and 29A.
When the movable deck 129 is retracted from the overhanging side, the tip of the deck portion 131 approaches the flip-up piece portion 135 installed on the fixed deck 127 side, as shown in FIGS. 28 (b) and 29 (a). As described above, the roller 165 provided at the tip of the second lock piece 157 rides on the flip-up piece portion 135. When the second lock piece 157 rides on the flip-up piece portion 135, the contact between the side end surface of the first lock piece 155 and the second lock piece 157 is released, that is, the first lock piece 155 is disengaged. It becomes a state. Therefore, at this time, the first lock piece 155 can be rotated, but the state in which the lever portion 139 of the tilting handrail 133 is pushed by the restoring force of the spring is maintained. At this time, the roller 169 provided on the operation piece 137 and the lower lever portion 139 of the tilting handrail 133 are in a state immediately before contact (see FIG. 29A).

When the movable deck 129 is further slid and moved to the retreat completion position, the lever portion 139 is pushed up by the roller 169 of the operation piece portion 137. As a result, as shown in FIG. 28C and FIG. 29B, the tilting handrail 133 tilts so that the upper end side of the tilting handrail 133 falls to the fixed deck 127 side. In the state where the tilting handrail 133 is tilted, the support rods 143 provided on both sides of the tilting handrail 133 abut on the deck cover 149 to prevent the tilting handrail 133 from falling further. In this state, like the movable deck 129 on the left side of FIG. 34, the movable deck 129 has the entire apparatus including the tilting handrail 133 arranged inside the turning range of the elector, that is, the state where it has come out of the turning range of the elector. In this case, the first lock piece 155 is pushed away by the lower lever part 139 of the tilting handrail 133, and as shown in FIG. Although rotating, since the restoring force of the spring is working, the state where the lower lever portion 139 is pressed is maintained.

  When the movable deck 129 is in the retracted state, the tilting handrail 133 is installed on the deck unit 131 in an inclined state as shown in FIG. 23B, so that the operator falls outward from the deck. There is no worry to do.

Next, the flow of the reverse operation of the movable deck 129, that is, the flow of the operation of moving the movable deck 129 from the retracted state to the extended state will be described. This operation is basically the reverse of the above operation.
In the process of sliding the movable deck 129 outward (for example, in the process of sliding outward about 100 mm from the retraction completion position), the contact state between the lever part 139 and the roller 169 of the operation piece part 137 changes. The contact position of 169 with respect to the lever portion 139 moves upward, whereby the tilting handrail 133 gradually rises. As described above, the tilting handrail 133 rises due to the restoring force of the spring that biases the tilting handrail 133 in the standing direction.

When the tilting handrail 133 rises, the first lock piece 155 also returns to a state in which the lever portion 139 is sandwiched between the deck frame 147 while pressing the lever portion 139 by the restoring force of the spring.
When the movable deck 129 is further slid outward (for example, further slid outward by about 50 mm), the second lock piece 157 riding on the flip-up piece 135 descends from the jump-up piece 135, It is pushed down by the spring force, comes into contact with the side end surface of the first lock piece 155, and returns to a position that functions as a rotation prevention spacer for the first lock piece 155 (see FIG. 28A). At this point, the tilting handrail 133 is completely locked and returned to the fixed state. In this state, the movable deck 129 slides further to the state shown in FIG.

In the state shown in FIG. 23A, the worker works on the deck portion 131. At this time, the tilting handrail 133 is completely locked by the lock mechanism 153, so that the worker can move the tilting handrail 133. The tilting handrail 133 does not tilt even if it leans on.
In addition, the tilting handrail 133 has a support rod 143, which functions as a safety fence on the side of the deck portion 131, and is therefore safe for the operator.

As described above, in the movable deck 129 of the present embodiment, the deck unit 131 slides inward and outward, and in conjunction with this, the tilting handrail 133 moves from the standing state to the inclined state, or from the inclined state to the standing state. The operation of changing the posture is performed.
Therefore, such a series of operations is classified into “operation of the tilting handrail 133”, “operation of the entire movable deck 129”, and “interlocking of the sliding operation of the movable deck 129 and the tilting of the tilting handrail 133”. explain.

<Operation of tilting handrail>
1. Tilt Tilt-type handrail 133 is pivotally mounted with its lower end on both sides pivotally attached to the outer end of deck portion 131. When it is in the standing state (FIG. 23A), it is locked in that state by the lock mechanism 153, and when it is in the inclined state, the support rod 143 comes into contact with the deck cover 149 to further incline it. It is supposed not to. In other words, the tilting handrail 133 is pivotally mounted and the range of rotation is restricted to a standing state and an inclined state, so that it can tilt as a whole.

2. Horizontal movement operation The tilting handrail 133 is attached to a deck 131 that slides inward and outward. Accordingly, the tilting handrail 133 inevitably moves inward and outward as the deck portion 131 slides inward and outward. In other words, the tilting handrail 133 tilts and moves in the horizontal direction inward and outward.

<Deformation operation of movable deck 129>
The movable deck 129 includes the deck portion 131 and the tilting handrail 133 as described above. The tilting handrail 133 tilts and moves horizontally as described above. Further, the deck unit 131 moves in the outer and inner directions by a sliding operation. Accordingly, when viewed as the entire movable deck 129, the tilting handrail 133 is tilted in accordance with the moving operation of the deck portion 131, and the deformation operation is performed so as not to interfere with the erector apparatus as a whole.
Further, the horizontal movement of the tilting handrail 133 is included in the deformation operation of the entire movable deck 129. This means that the entire movable deck 129 performs the deformation operation, and the tilting handrail 133 is horizontally moved in conjunction with this. It can also be understood as moving.

<Interlocking with the slide operation of the deck>
As described above, the tilting handrail 133 is tilted in conjunction with the sliding operation of the deck unit 131. Since the slide operation of the deck unit 131 is a part of the deformation operation of the movable deck 129, the tilting handrail 133 can be regarded as tilting in conjunction with the deformation operation of the movable deck 129.

According to the movable deck 129 of the present embodiment, when the movable deck 129 moves outward, the tilting handrail 133 rises in conjunction with the operation, and when the movable deck 129 moves inward, the operation. Since the tilting handrail 133 moves inward in conjunction with the tilt, the space required for the deformation can be reduced. Therefore, the movable deck 129 that can be installed can be realized not only when the shield machine has a large diameter but also with a small diameter.
Moreover, according to the movable deck 129 of this Embodiment, the installation or removal operation | movement of a handrail becomes unnecessary. In other words, since the tilting handrail 133 that is automatically installed in conjunction with the operation of the movable deck 129 is used without using a special actuator or the like, the movable deck 129 is always unaware of the operator. A handrail will be set when using, and safety when using the movable deck 129 is improved. In addition, since the actuator is not used for the operation of the handrail, the risk of occurrence of those failures is low, and it can be installed in a compact space as in the past.
Furthermore, in the movable deck 129 of the present embodiment, the tilting handrail 133 stands up and is locked if the deck portion 131 does not completely protrude (for example, about 150 to 200 mm). Excellent in properties.

The operation of the erector device 121 is, for example, a case where the turning operation is performed at a normal work speed (normal speed turning operation) as in the case of performing a segment assembly operation, and a slower operation than the normal speed turning operation is performed. In the case where the operation is divided into the slow turning operation, it is desirable for safety to associate the operation of the erector apparatus with the operation of the movable deck 129. For example, the retracted state of the movable deck 129 (the state moved most inward) is monitored by the limit switch, and the interlock is made so that the normal speed turning is allowed for the erector device 121 only when the movable deck 129 is retracted. Is programmed and controlled based on this program. In this way, the movable deck 129 starts to move outward, and when the limit switch is turned off, the interlock works on the side of the erector device 121 and the erector device 121 is stopped, which is safe.
In order to further increase safety, in addition to the above control, an interlock is programmed on the movable deck 129 side so that the movable deck 129 does not operate when the erector device 121 is performing a normal speed turning operation. Control is sufficient.

  By providing the movable deck 129 of the present embodiment, a shield machine (for example, a small space occupied by the movable deck and a safe shield machine) that exhibits the effects of the movable deck 129 described above is realized. can do.

  The tilting handrail 133 functions as a handrail even when the movable deck 129 is in the retracted state, as shown in FIG. 23B. In this case, the tilting handrail 133 is inclined. Therefore, a tip will extend greatly inward, and work space will be made small. Therefore, by making the tilting handrail 133 extendable and contracting, when the movable deck 129 is in the retracted state like the movable deck 129 on the left side of FIG. 35, the tilting handrail 133 is contracted in the direction indicated by the arrow in the drawing. When the movable deck 129 is in an overhanging state like the movable deck 129 on the right side of FIG. 35, the tilting handrail 133 may be extended to increase safety. In this case, as an example of a structure for expanding and contracting the tilting handrail 133, a structure in which the rectangular tilting handrail 133 is divided into two parts in the vertical direction and the distal end side is inserted into the proximal end side can be cited.

  The support rod 143 is a member for regulating the tilt angle of the tilting handrail 133 and at the same time, a member that functions as a side safety fence when the tilting handrail 133 stands up. Here, in order to further enhance the lateral safety when the tilting handrail 133 stands up, as shown in FIG. 36, a column 171 is erected on the fixed deck 127 side, and the upper end of the column 171 and the tilting handrail are arranged. The ends of 133 may be connected by a chain 173, and the chain 173 may function as a side safety fence of the deck unit 131 together with the tilting handrail 133. In this case, when the movable deck 129 is in a retracted state, such as the movable deck 129 on the left side of FIG. 36, the chain 173 is U-shaped, and the movable deck 129 is configured like the movable deck 129 on the right side of FIG. When is in the overhanging state, it is in a state of being stretched between the column 171 and the tilting handrail 133.

  In addition, as shown in FIG. 37, instead of the chain 173, a support column 171 and a tilting handrail 133 may be connected by a link member 175. In this case, when the movable deck 129 is in the retracted state like the left movable deck 129 in FIG. 37, the link member 175 is folded, and the movable deck 129 overhangs like the right movable deck 129 in FIG. When it is in a state, it is in a state of being stretched between the support column 171 and the tilting handrail 133.

  Furthermore, known urging means other than a spring may be employed as the urging means in the above-described embodiment. For example, as means for urging the tilting handrail 133 in the standing direction, instead of a spring, a “weight” is hung on the lower side of the lever portion 139, and the action of gravity acting on the “weight” is used. The tilting handrail 133 may be raised like a “pendulum”.

DESCRIPTION OF SYMBOLS 1 Shield machine 3 Front trunk | drum 5 Rear trunk | drum 5a Lower rear trunk | drum 5b Upper front trunk | drum 7 Cutter head 9 Shield jack 10 Segment 11 Elector apparatus 13 Grip part 15 Arm part 17 Fixed deck 19 Movable deck 21 Deck part 23 Folding Tatami-style handrail 25 Guide rail 27 Deck frame 29 Deck plate 31 1st roller 33 2nd roller 35 Gutter-shaped portion 37 Inclined portion 39 Column member 41 Side upper arm 43 Side lower arm 45 Front frame 45a Rectangular frame 45b Reverse U-shaped frame portion 47 Horizontal bar 49 Arm portion 51 Third roller 61 Shield machine 63a Lower front barrel portion 63b Upper front barrel portion 65 Rear barrel portion 65a Lower rear barrel portion 65b Upper front barrel portion 67 Cutter head 69 Shield jack 70 Segment 71 Elector device 73 Grip part 75 Arm part 77 Fixed deck 79 Movable deck DESCRIPTION OF SYMBOLS 0 Bracket 81 Deck part 83 Folding type handrail 85 Drive mechanism part 87 Deck frame 89 Deck plate 91 Side handrail 93 Front handrail 95 Rectangular frame member 97 Reverse U-shaped part 99 1st drive frame member 101 2nd drive frame member 103 Main body Part 105 Rod 107 Drive jack 109 Screw conveyor 111 Shield machine 113 Front trunk part 115 Rear trunk part 117 Cutter head 119 Shield jack 120 Segment 121 Elector device 123 Grip part 125 Arm part 127 Fixed deck 129 Movable deck 131 Deck part 133 Tilt type Handrail 135 Bounce-up piece part 137 Operation piece part 139 Lever part 141 Reed 143 Support rod 145 Guide rail 147 Deck frame 148 Deck plate 149 Deck cover 151 Support part 153 Lock mechanism 155 1st lock piece 157 2nd lock piece 159 Bracket part 161 Horizontal piece part 163 Contact part 165 Roller 167 Scissor-like member 169 Roller 171 Post 173 Chain 175 Link member

Claims (11)

  A movable deck provided in a shield machine, wherein the movable deck includes a handrail that is movable in conjunction with the deformation operation.   A movable deck provided in a shield machine, the movable deck being configured to be deformable so as not to interfere with an erector apparatus that transports the segment, and provided with a handrail that can be moved in conjunction with the deformation operation. A movable deck characterized by   A movable deck provided in the shield machine, the movable deck is configured to be deformable so as not to interfere with an erector apparatus that carries the segment, and includes a foldable handrail, and the folding operation of the handrail is A movable deck having a component that horizontally moves between a shield machine and a tunnel wall surface dug by the shield machine.   A movable deck provided in the shield machine, the movable deck is configured to be deformable so as not to interfere with an erector device that transports the segment, and in a plane that intersects the direction of the shield machine. A movable deck comprising a handrail that can be folded by moving. The erector device includes a transport device that swivels and transports the segment,
5. The movable deck can be arranged together with the handrail at a position that does not interfere with the turning range inside the turning range of the transporting device in a plane that intersects the excavation direction. The movable deck as described in any one of.   The movable deck according to any one of claims 1 to 5, wherein the handrail includes a link mechanism that enables interlocking with a deformation operation of the movable deck.   2. The deformation operation of the movable deck is characterized in that the deck portion of the movable deck performs a sliding operation in a direction intersecting a traveling direction of the shield machine and a handrail is folded. The movable deck as described in any one of 6.   A shield machine comprising the movable deck according to any one of claims 1 to 7. An erector apparatus capable of a fine speed turning operation and a normal speed turning action that is a turning action at a speed faster than the fine speed turning action, a fixed deck on which an operator works, and the erector apparatus installed on the fixed deck, A shield machine equipped with a movable deck that can be deformed so as not to interfere,
The movable deck is provided with a foldable handrail in a plane intersecting the excavation direction,
The handrail is folded from the tunnel excavation wall surface side to the fixed deck side when the erector device is performing the normal speed turning operation, and when the erector device is not performing the normal speed turning operation, the handrail is A shield machine that can be extended from the fixed deck side toward the tunnel excavation wall side.   The shield machine according to claim 9, wherein the handrail includes a link mechanism that enables interlocking with the deformation operation of the movable deck.   The deformation operation of the movable deck is characterized in that the deck portion of the movable deck performs a sliding operation in a direction intersecting a traveling direction of the shield machine and a handrail is folded. The shield machine described.

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