JP6209954B2 - Telha crane for pneumatic caisson and construction method of pneumatic caisson - Google Patents

Description

  The present invention relates to a Telka crane for a pneumatic caisson and a method for constructing a pneumatic caisson.

  In the construction of the pneumatic caisson, the earth and sand bucket is reciprocated through the material shaft and the material lock by the Telha crane between the work room at the bottom of the caisson and the earth and sand hopper, and the earth is discharged from the room (for example, Patent Document 1). The terha crane horizontal jib extends from the top of the mast installed in the vicinity of the pneumatic caisson to the top of the material lock, and the earth and sand bucket is between the tip of the horizontal jib and the top of the mast, and the top of the mast. And the earth and sand hopper below it. Here, in the Teruha crane described in Patent Document 1, the horizontal jib is supported on the upper part of the mast so as to be turnable.

JP-A-10-280425

  By the way, the Telka crane for the pneumatic caisson is a crane dedicated to the work to remove soil from the work room, so it is necessary to install a tower crane and carry out the lifting work such as hanging materials. is there. Here, when carrying out the suspended load work by the tower crane between the mast and the pneumatic caisson, it is necessary to avoid the interference between the suspended load and the horizontal jib. Therefore, in the case of the Telha crane described in Patent Document 1, it is necessary to swivel the horizontal jib, but in order to widen the working space between the mast and the pneumatic caisson, the horizontal jib must be swung largely. It takes time and is inefficient. In addition, the horizontal jib may not be able to swivel due to reasons such as the distance between the terha cranes being narrow, in which case it is not possible to ensure a sufficient working space between the mast and the pneumatic caisson. .

  The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a Telka crane for a pneumatic caisson that can efficiently carry out a lifting work with another crane between a mast and a pneumatic caisson. It is to make.

  In order to solve the above problems, a Telka crane for a pneumatic caisson according to the present invention, a mast installed in the vicinity of the pneumatic caisson, a horizontal jib extending horizontally from above the mast to above the material lock, A transport mechanism that reciprocates between the upper part of the mast and the tip of the horizontal jib and lifts and lowers the suspended load in the mast and the tip of the horizontal jib, and the horizontal jib is orthogonal to the longitudinal direction. And a moving mechanism for moving in the horizontal direction.

  In the terha crane for the pneumatic caisson, the moving mechanism is provided at an upper portion of the mast and extends in a lateral direction perpendicular to the longitudinal direction of the horizontal jib, and the horizontal jib is mounted on the rail. A plurality of wheels provided so as to roll, a drive mechanism for rolling the wheels, and a guide mechanism for guiding the wheels so as to move along the rails.

  In the Telka crane for the pneumatic caisson, the plurality of masts are arranged at intervals in a transverse direction orthogonal to the longitudinal direction of the horizontal jib, and the moving mechanism is spanned across the plurality of masts. A pair of rails and a drive mechanism for moving the horizontal jib along the pair of rails.

  In addition, the pneumatic caisson construction method according to the present invention is such that the Telha crane is installed so that the material lock and the material shaft are positioned under the tip of the horizontal jib, and the mast is used using another crane. A pneumatic caisson construction method for performing a suspended work between a mast and a pneumatic caisson, wherein the suspended work is performed between the mast and the pneumatic caisson using the other crane. The horizontal jib is moved by the moving mechanism so as to be retracted from the suspended load path.

  A pneumatic caisson construction method according to the present invention is the Telha crane according to claim 4, wherein each of the plurality of masts and each of the plurality of material locks and the material shaft are arranged in the longitudinal direction of the horizontal jib. In this method, the pneumatic caisson is installed, and when the horizontal jib exists at a position off the top of the mast, the suspension work is stopped.

  ADVANTAGE OF THE INVENTION According to this invention, the Telha crane for pneumatic caissons which can implement efficiently the lifting work by the other crane between a mast and a pneumatic caisson can be provided.

It is an elevation view which shows the Telha crane which concerns on one Embodiment. It is an elevation view which expands and shows a 1st trolley and a 2nd trolley. It is the top view to which the 1st trolley and the 2nd trolley were expanded. It is an elevation view which shows a horizontal jib and a drive mechanism. It is a top view which shows a horizontal jib and a drive mechanism. It is a roping figure (plan view) of a hoisting line, a traversing line, and a traversing line. (A)-(C) are the roping figure (elevation figure) of a hoisting rope, a transverse line, and a transverse tension line. It is a figure which shows the state of the drive mechanism at the time of the rising of a sediment bucket. It is a figure which shows the state of the traversing mechanism at the time of the horizontal movement of the earth and sand bucket. It is a figure which shows the state of the traversing mechanism at the time of the horizontal movement of the earth and sand bucket. It is an elevation view which shows a moving mechanism from the base end side of a horizontal jib. It is a top view which shows a moving mechanism. It is an elevation view which shows the state which moved the horizontal jib to the horizontal direction orthogonal to the longitudinal direction. It is an elevation view which shows the state which moved the horizontal jib to the horizontal direction orthogonal to the longitudinal direction. It is a top view which shows the state which moved the horizontal jib to the horizontal direction orthogonal to the longitudinal direction. It is a top view which shows the state which moved the horizontal jib to the horizontal direction orthogonal to the longitudinal direction. It is an elevation view which shows the moving mechanism which concerns on other embodiment from the base end side of a horizontal jib. It is a top view which shows the drive mechanism of the moving mechanism which concerns on other embodiment. It is a top view which shows the Telha crane which concerns on other embodiment. It is an elevation view which shows the moving mechanism which concerns on other embodiment from the base end side of a horizontal jib.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an elevation view showing a Telha crane 10 according to an embodiment. As shown in this figure, a Telha crane 10 is a horizontal jib crane used in the construction of a pneumatic caisson 1, and an earth and sand bucket 2 is passed through a material shaft 3 and a material lock 4 to a work room 5 at the bottom of the caisson and a ground surface. It transports to and from the earth and sand hopper 14.

  In the construction of the pneumatic caisson 1 according to the present embodiment, the material lock 4 is installed at the upper end of the material shaft 3. Then, the material shaft 3 is added in accordance with the increase in the sinking amount of the pneumatic caisson 1. At that time, after removing the material lock 4, the material shaft 3 is added upward, and the material lock 4 is installed on the upper end of the material shaft 3 again.

  The Telha crane 10 includes a mast 12 installed in the vicinity of the construction area of the pneumatic caisson 1, an earth and sand hopper 14 installed in the lower part of the mast 12, and the material shaft 3 and the material lock 4 directly above the mast 12. A horizontal jib 20 that extends horizontally so as to pass through, a transport mechanism 30 that is installed on the horizontal jib 20 and the mast 12, moves the earth and sand bucket 2 up and down and moves in the horizontal direction, and the horizontal jib 20 is orthogonal to the longitudinal direction. And a moving mechanism 50 (see FIGS. 11 to 16) for moving in the horizontal direction. The mast 12 is a square columnar steel tower, and supports the horizontal jib 20 above the material lock 4.

  The horizontal jib 20 has a configuration in which a pair of I beams 21 parallel to each other are coupled by a plurality of steel members 23 (see FIG. 3 and the like) disposed therebetween, and the lower flanges of the pair of I beams 21 are rails 22. It has become. The rail 22 extends so as to pass right above the earth and sand hopper 14 and right above the material lock 4. Here, the horizontal jib 20 is supported by the mast 12 so as to be movable in a horizontal direction orthogonal to the longitudinal direction of the horizontal jib 20. That is, although the mechanism which moves the horizontal jib 20 to the horizontal direction orthogonal to the longitudinal direction is installed in the Telha crane 10, the mechanism which turns the horizontal jib 20 is not installed.

  The transport mechanism 30 includes a first trolley 32 and a second trolley 34 supported by the horizontal jib 20 so as to be horizontally movable along the rails 22, a hoisting mechanism 40 for raising and lowering the earth and sand bucket 2, and the earth and sand bucket 2. And a traversing mechanism 80 for horizontal movement. The first trolley 32 and the second trolley 34 are arranged side by side in the longitudinal direction of the horizontal jib 20, and the second trolley 34 is arranged closer to the front end side of the horizontal jib 20 than the first trolley 32.

  FIG. 2 is an enlarged elevation view showing the first trolley 32 and the second trolley 34, and FIG. 3 is an enlarged plan view of the first trolley 32 and the second trolley 34. As shown in these drawings, two sets of guide rollers 32 </ b> A are provided on the upper portion of the first trolley 32, two sets for each rail 22. The two guide rollers 32 </ b> A of each set are arranged coaxially with the web of the I beam 21 interposed therebetween, and the two sets of guide rollers 32 </ b> A are arranged apart from each other in the longitudinal direction of the horizontal jib 20. The four guide rollers 32A are arranged so as to be able to roll on the rails 22, and the first trolley 32 is supported by the rails 22 on both sides so as to be horizontally movable via a total of eight guide rollers 32A. ing.

  Further, two guide rollers 34 </ b> A for each rail 22 are arranged on the upper portion of the second trolley 34 so as to be separated from each other in the longitudinal direction of the horizontal jib 20. The two guide rollers 34A are arranged on the rail 22 so as to be able to roll, and the second trolley 34 is supported by the rails 22 on both sides so as to be horizontally movable via a total of four guide rollers 34A. Yes.

  FIG. 4 is an elevation view showing the horizontal jib 20 and the transport mechanism 30, and FIG. 5 is a plan view showing the horizontal jib 20 and the transport mechanism 30. As shown in these drawings, a scaffold 24 and a fence 26 are provided around the horizontal jib 20. In addition, it demonstrates below by making the mast 12 side into the base end side and the material shaft 3 side as the front end side at the one end side of the horizontal jib 20 in the longitudinal direction. Further, in FIG. 5, illustration of a hoisting rope 47, a traversing rope 88, and a traversing tension cord 89, which will be described later, is omitted.

  The hoisting mechanism 40 includes a hoisting winch 42 disposed at the upper end of the mast 12, a hoisting sheave 43 disposed at the center in the longitudinal direction of the horizontal jib 20, and upper and lower members disposed at the base end of the horizontal jib 20. A pair of winding sheaves 44, a winding sheave 45 disposed on the second trolley 34, a winding sheave 46 disposed on the first trolley 32, and a winding winch 42 wound around the winding sheaves 43 to 46. And a hoisting rope 47 wound around. The tip of the hoisting rope 47 is attached to the earth and sand bucket 2. The hoisting sheaves 43 to 46 are arranged in the center in the width direction in the plan view of the horizontal jib 20, and the hoisting rope 47 passes above and below the center in the width direction in the plan view of the horizontal jib 20. It is wound around hoisting sheaves 43-46.

  Further, the traversing mechanism 80 includes a traversing winch 82 disposed between the hoisting winch 42 and the hoisting sheave 43 on the horizontal jib 20 and a pair of upper and lower pairs disposed at the base end portion of the horizontal jib 20. Two sets of transverse sheaves 83, a pair of transverse sheaves 84 disposed at the tip of the horizontal jib 20, a pair of transverse sheaves 85 and one transverse tension sheave 81 disposed on the second trolley 34, and a horizontal jib 20, a pair of traverse sheaves 86 (see FIG. 4) disposed between the traverse sheave 84 and the traverse winch 82, an overload prevention limit switch 87 disposed at the tip of the horizontal jib 20, and a traverse sheave 83. A pair of traversing ropes 88 wound around the traversing winch 82 and a traversing tension line 89 wound around the traverse tension sheave 81. One end of the traversing rope 88 is fixed to the first trolley 32 and the other end is fixed to the overload prevention limit switch 87. Further, one end of the traversing tension line 89 is fixed to the lower part of the base end of the horizontal jib 20 and the other end is fixed to the first trolley 32.

  The transverse winch 82 is a capstan winch having a pair of warving drums arranged coaxially, and a transverse rope 88 is wound around each warping drum. Further, as shown in FIG. 5, the transverse sheaves 83 to 86 are arranged in two columns, and the transverse sheaves 83 to 86 in one column are arranged along one rail 22, and The transverse sheaves 83 to 86 are arranged along the other rail 22. One traverse line 88 is wound around the traverse sheaves 83 to 86 in one column, and the other traverse line 88 is wound around the traverse sheaves 83 to 86 in the other column.

  FIG. 6 is a roping diagram (plan view) of the hoisting rope 47, the traversing cable 88, and the traversing tensioning cable 89, and FIGS. 7A to 7C show the hoisting cable 47, the traversing cable 88, and the traversing line. It is a roping figure (elevation) of the tension cord 89. As shown in FIGS. 6 and 7A, the hoisting winch 42, the hoisting sheave 43, and the upper hoisting sheave 44 are arranged on the upper side of the horizontal jib 20, and the pair of upper and lower hoisting sheaves 44 are The winding sheaves 45 and 46 are disposed on the lower side of the horizontal jib 20. The hoisting rope 47 extends from the hoisting winch 42 to the distal end side of the horizontal jib 20 on the upper side of the horizontal jib 20, and the direction is changed to the base end side of the horizontal jib 20 by the hoisting sheave 43. At 44, the direction is changed to the lower side of the horizontal jib 20. Then, the hoisting rope 47 is changed in direction toward the distal end side of the horizontal jib 20 by the lower hoisting sheave 44, and is changed in direction toward the proximal end side of the horizontal jib 20 by the hoisting sheave 45 of the second trolley 34. The direction is changed downward by the winding sheave 46 of the first trolley 32.

  Here, in order to raise the earth and sand bucket 2, it is necessary to wind up the hoisting rope 47 by the hoisting winch 42 in a state where the first trolley 32 is stopped. In order to move the earth and sand bucket 2 horizontally, the first trolley 32 needs to be traversed. In order to enable these operations, the second trolley 34 is provided, and the transverse rope 88 and the transverse tension cord 89 are roped as described below.

  As shown in FIGS. 6 and 7B, the traversing winch 82 and the traversing sheave 86 are arranged on the upper side of the horizontal jib 20, and the two sets of traversing sheaves 83 are arranged on the side surface of the base end portion of the horizontal jib 20. The traversing sheave 85 of the second trolley 34 is disposed below the horizontal jib 20, and the traversing sheave 84 is disposed on the inner wall surface at the tip of the horizontal jib 20. The traverse line 88 extends from the traverse winch 82 to the front end side and the base end side of the horizontal jib 20 on the upper side of the horizontal jib 20, and the direction is changed to the lower side of the horizontal jib 20 by the upper traverse sheave 83 on the base end side. The tip side is guided to a traverse sheave 84 by a traverse sheave 86. Then, the traversing line 88 is changed in direction toward the front end side of the horizontal jib 20 by the lower traverse sheave 83 on the base end side of the horizontal jib 20, and at the front end side of the horizontal jib 20, The direction is changed to the base end side. Then, below the horizontal jib 20, one end side of the traversing rope 88 extends from the lower traversing sheave 83 to the first trolley 32 and is fixed to the first trolley 32, and the other end side of the traversing rope 88 is The direction is changed to the front end side of the horizontal jib 20 by the transverse sheave 85 of the two trolleys 34 and is fixed to the overload prevention limit switch 87.

  Here, if both ends of the traversing cable 88 are fixed to the first trolley 32, the earth and sand bucket 2 is raised with the first trolley 32 stopped even though the first trolley 32 can be traversed. I can't. Therefore, one end of the traversing cable 88 is fixed to the first trolley 32 and the other end is hooked on the traversing sheave 85 of the second trolley 34 and fixed to the overload prevention limit switch 87 at the tip of the horizontal jib 20. Further, as will be described below, roping of the traversing tension cord 89 is performed.

  As shown in FIGS. 6 and 7C, the transverse tension line 89 extends from the proximal end of the horizontal jib 20 to the transverse tension sheave 81 of the second trolley 34 on the lower side of the horizontal jib 20. The direction is changed to the base end side of the horizontal jib 20 by the sheave 81 and fixed to the first trolley 32.

  Here, when the traverse tension line 89 is tensioned, a force in a direction in which the first trolley 32 and the second trolley 34 approach each other acts, and the traverse line 88 is strained by this force. It is in the state that was done. In addition, when the tension force of the traverse line 88 and the traverse tension line 89 becomes excessive, the overload prevention limit switch 87 is operated.

  FIG. 8 is a diagram illustrating a state of the transport mechanism 30 when the earth and sand bucket 2 is lifted. As shown in this figure, a force from the hoisting rope 47 to the proximal end side of the horizontal jib 20 acts on the second trolley 34, and this force is horizontally applied to the first trolley 32 via the transverse rope 88. It acts as a pulling force on the base end side of the jib 20. That is, when the hoisting rope 47 is wound up by the hoisting winch 42, the force P toward the proximal end of the horizontal jib 20 acts on the first trolley 32.

  Here, a force Q toward the distal end side of the horizontal jib 20 is applied to the first trolley 32 by the transverse tension cord 89, and the force Q and the force P are balanced. Thereby, in the state which stopped the 1st trolley 32, the hoisting rope 47 can be wound up by the hoisting winch 42, and the earth and sand bucket 2 can be raised.

  9 and 10 are views showing a state of the traversing mechanism 80 when the earth and sand bucket 2 moves horizontally. As shown in FIG. 9, when the traverse winch 82 rotates in the clockwise direction in the figure (the direction of arrow A in the figure), the force R from the traverse 88 to the proximal end of the horizontal jib 20 with respect to the first trolley 32 is generated. This force acts as a force S that pulls the second trolley 34 to the proximal end side of the horizontal jib 20 via the transverse tension line 89. At this time, since no force resisting the forces R and S is generated, the first trolley 32 and the second trolley 34 move to the proximal end side of the horizontal jib 20.

  Further, as shown in FIG. 10, when the traversing winch 82 rotates counterclockwise in the figure (in the direction of arrow B in the figure), the force from the traversing rope 88 to the distal end side of the horizontal jib 20 with respect to the second trolley 34. T acts, and this force acts as a force U that pulls toward the front end side of the horizontal jib 20 against the first trolley 32 via the traversing tension line 89. At this time, since no force resisting the forces T and U is generated, the first trolley 32 and the second trolley 34 move to the front end side of the horizontal jib 20. Further, since both the first trolley 32 and the second trolley 34 move to the proximal end side of the horizontal jib 20, the traverse winch 82 and the traverse sheave 86, the traverse sheave 86 and the traverse sheave 84, and the traverse Between the sheave 84 and the traversing sheave 85, the traversing cord 88 is not loosened.

  Here, as shown in FIGS. 9 and 10, the moving sheave 85 of the second trolley 34 around which the traversing cable 88 is wound is a moving pulley, so that the movement amount of the second trolley 34 is the first trolley. It becomes 1/2 of the movement amount of 32. That is, the first trolley 32 moves to a position immediately above the material lock 4 and directly above the earth and sand hopper 14, whereas the second trolley 34 has the vicinity of the front end of the horizontal jib 20 and the longitudinal center of the horizontal jib 20. Move between departments. Further, since both the first trolley 32 and the second trolley 34 move to the front end side of the horizontal jib 20, the traversing rope 88 is not loosened between the traversing winch 82 and the traversing sheave 83.

  FIG. 11 is an elevation view showing the moving mechanism 50 from the base end side of the horizontal jib 20, and FIG. 12 is a plan view showing the moving mechanism 50. As shown in these drawings, the moving mechanism 50 includes a pair of steel frames 51 arranged in parallel to each other on the mast 12, and a plurality of wheel units 60 and 70 attached to the lower part of the pair of steel frames 51. Yes. The pair of steel frames 51 are H-shaped steels and extend in a horizontal direction perpendicular to the longitudinal direction of the horizontal jib 20, and are respectively provided on the top end rail 12 </ b> A of the mast 12 via wheel units 60 and 70. It is on. The rail 12 </ b> A is an H-shaped steel that extends parallel to the steel frame 51. Moreover, the steel frame 51 is shorter than the rail 12A, and the steel frame 51 and the rail 12A are arranged so that the flanges are positioned vertically.

  The wheel unit 60 is attached to the lower part of one end of the steel frame 51 in the longitudinal direction, and the wheel unit 70 is attached to the lower part of the other end of the steel frame 51 in the longitudinal direction. The wheel unit 60 includes a wheel 61, a motor 62 that rotates the wheel 61, a plurality of guide wheels 63, a cushion material 64, a frame 65 that supports these at one end in the longitudinal direction of the steel frame 51, and wheel rotation. And a brake mechanism (not shown).

  The frame 65 includes a pair of side plates 65A that sandwich the upper flange of the rail 12A in the width direction, a pair of side plates 65B that join the side ends of the pair of side plates 65A, and an upper plate 65C that joins the upper ends of the side plates 65A and 65B. And a support plate 65D extending horizontally from the upper part of the outer side plate 65A (see FIG. 11). The upper plate 65C is fixed to the lower surface of one end in the longitudinal direction of the rail 12A.

  A wheel 61 is disposed in a space surrounded by the side plates 65A and 65B, the upper plate 65C, and the upper flange of the rail 12A. The wheel 61 is rotatably supported by a pair of side plates 65A via bearings. The motor 62 is installed on the support plate 65D and is fixed to the support plate 65D. Here, the motor 62 is connected to the axle of the wheel 61 via a drive transmission mechanism, and rotates the wheel 61.

  The guide wheel 63 is rotatably supported by the side plate 65A via a bearing. Here, a pair of horizontally arranged guide wheels 63 are arranged so as to sandwich the upper flange of the rail 12A in the thickness direction together with the wheels 61. Thus, the wheel 61 is prevented from being lifted from the upper flange of the rail 12A by the guide wheel 63. The wheel 61 is positioned in the width direction of the upper flange by the pair of side plates 65A and the upper flange of the rail 12A. Therefore, the wheel 61 rolls on the rail 12A in the longitudinal direction while being positioned in the vertical direction and the width direction of the upper flange of the rail 12A.

  A plate-like stopper 66 is fixed to one end of the upper flange of the rail 12 </ b> A in the longitudinal direction, and a cushion material 64 is fixed to a side plate 65 </ b> B facing the stopper 66. The cushion material 64 is a rod-like member having impact absorbing performance such as rubber, and is arranged so that the stopper 66 is positioned on an extension line of the axis.

  The wheel unit 70 includes a wheel 71, a plurality of guide wheels 73, a cushion material 74, a frame 75 that supports these at the lower part of the other end in the longitudinal direction of the steel frame 51, and a brake mechanism (not shown) that stops the rotation of the wheel 71. ).

  The frame 75 includes a pair of side plates 75A that sandwich the upper flange of the rail 12A in the width direction, a pair of side plates 75B that join the side ends of the pair of side plates 75A, and an upper plate 75C that joins the upper ends of the side plates 75A and 75B. It has. The upper plate 75C is fixed to the lower surface at the other longitudinal end of the rail 12A.

  A wheel 71 is disposed in a space surrounded by the side plates 75A and 75B, the upper plate 75C, and the upper flange of the rail 12A. The wheel 71 is rotatably supported by a pair of side plates 75A via bearings. ing. The guide wheel 73 is rotatably supported by the side plate 75A via a bearing. Here, a pair of horizontally arranged guide wheels 73 are arranged so as to sandwich the upper flange of the rail 12A in the thickness direction together with the wheels 71. Thus, the wheel 71 is prevented from being lifted from the upper flange of the rail 12A by the guide wheel 73. The wheel 71 is positioned in the width direction of the upper flange by the pair of side plates 75A and the upper flange of the rail 12A. Accordingly, the wheel 71 rolls on the rail 12A in the longitudinal direction in a state where the wheel 71 is positioned in the vertical direction and the width direction of the upper flange of the rail 12A.

  Further, a plate-like stopper 76 is fixed to the other longitudinal end of the upper flange of the rail 12A, and a cushion material 74 is fixed to a side plate 75B facing the stopper 76. The cushion material 74 has the same configuration as the cushion material 64 described above, and is disposed so that the stopper 76 is positioned on an extension line of the axis.

  A weight (not shown) for balancing the weight of the distal end side and the proximal end side of the horizontal jib 20 is provided on the proximal end side of the horizontal jib 20, and the distal end side of the horizontal jib 20 is on the lower side. Inclination is prevented.

  13 and 14 are elevation views showing a state in which the horizontal jib 20 is moved in the horizontal direction orthogonal to the longitudinal direction thereof, FIG. 15 is a plan view corresponding to FIG. 13, and FIG. It is a top view corresponding to. As shown in FIGS. 13 and 15, when the motor 62 is driven in the first direction, the wheel 61 rotates in one direction (counterclockwise direction shown in FIG. 13), and the horizontal jib 20 moves in the longitudinal direction. It moves to the horizontal stopper 66 side which is orthogonal. Here, the horizontal jib 20 can move to a position where the cushion material 64 hits the stopper 66.

  On the other hand, as shown in FIGS. 14 and 16, when the motor 62 is driven in the second direction, the wheel 61 rotates in the other direction (clockwise direction shown in FIG. 14), and the horizontal jib 20 moves in the longitudinal direction. It moves to the horizontal stopper 76 side orthogonal to. Here, the horizontal jib 20 can move to a position where the cushion material 74 hits the stopper 76.

  As described above, in the Telha crane 10 according to the present embodiment, the mast 12 is installed in the vicinity of the pneumatic caisson 1, and the horizontal jib 20 extends horizontally from the upper part of the mast 12 to above the material lock 4 to be conveyed. The mechanism 30 reciprocates the earth and sand bucket 2 between the upper part of the mast 12 and the front end of the horizontal jib 20 and moves up and down in the mast 12 and the front end of the horizontal jib 20. Here, the Telha crane 10 according to the present embodiment includes a moving mechanism 50 that moves the horizontal jib 20 in a lateral direction orthogonal to the longitudinal direction. As a result, when the tower crane is installed in the vicinity of the pneumatic caisson 1 and the hanging work such as the hanging of the material is performed between the mast 12 and the pneumatic caisson 1, the horizontal jib 20 is moved by the moving mechanism 50. By retreating from the route of the suspended load, interference between the suspended load and the horizontal jib 20 can be avoided.

  Here, since the horizontal jib 20 can be retracted from the path of the suspended load by sliding (translating) the horizontal jib 20 in the lateral direction orthogonal to the longitudinal direction by the moving mechanism 50, the horizontal jib 20 The moving stroke of the horizontal jib 20 can be shortened and the horizontal jib 20 can be retracted from the suspended load path in a short time compared with the case of turning for the purpose of retracting the suspended load from the suspended load path. Further, even when the installation interval of the horizontal jib 20 is narrow, the horizontal jib 20 can be retracted from the route of the suspended load without being affected by this, and the load work between the mast 12 and the pneumatic caisson 1 can be performed. Sufficient space can be secured.

  FIG. 17 is an elevational view showing the moving mechanism 150 according to another embodiment from the base end side of the horizontal jib 20. As shown in this figure, the moving mechanism 150 includes a pair of steel frames 51 arranged in parallel to each other on the mast 12, a plurality of wheel units 170 attached to the lower part of the pair of steel frames 51, and a drive mechanism 160. I have. The wheel unit 170 is attached to lower portions of both ends of the steel frame 51 in the longitudinal direction. The wheel unit 170 includes a pair of wheels 171, a plurality of guide wheels 73, cushion materials 64 and 74, a frame 175 that supports these at the lower end of the longitudinal direction of the steel frame 51, and a brake that stops the rotation of the wheels 171. Mechanism (not shown).

  The frame 175 includes a pair of side plates 175A that sandwich the upper flange of the rail 12A in the width direction, a pair of side plates 175B that join the side ends of the pair of side plates 175A, and an upper plate 175C that joins the upper ends of the side plates 175A and 175B. It has. The upper plate 175C is fixed to the lower surface of the end portion in the longitudinal direction of the rail 12A.

  In a space surrounded by the side plates 175A and 175B, the upper plate 175C and the upper flange of the rail 12A, a pair of wheels 171 are horizontally arranged, and these wheels 171 are attached to the pair of side plates 175A via bearings. It is rotatably supported. The guide wheel 73 is rotatably supported on the side plate 75A via a bearing. Here, a pair of horizontally arranged guide wheels 73 are arranged so as to sandwich the upper flange of the rail 12A in the thickness direction together with the wheels 171. Accordingly, the wheel 171 is prevented from being lifted from the upper flange of the rail 12A by the guide wheel 73. The wheel 171 is positioned in the width direction of the upper flange by the pair of side plates 175A and the upper flange of the rail 12A. Therefore, the wheel 171 rolls on the rail 12A in the longitudinal direction in a state where the wheel 171 is positioned in the vertical direction and the width direction of the upper flange of the rail 12A.

  Moreover, the cushion material 64 is attached to the longitudinal direction one end surface of the steel frame 51, and it is distribute | arranged so that the stopper 66 may be located on the extension line | wire of the axis line. Moreover, the cushion material 74 is attached to the longitudinal direction other end surface of the steel frame 51, and it arrange | positions so that the stopper 76 may be located on the extension line | wire of the axis line.

  As shown in the plan views of FIGS. 17 and 18, the drive mechanism 160 includes a rack 161, a motor 162, and a bracket 163. The motor 162 is attached to the side of the steel frame 51 via a bracket 163. The rack 161 is provided so as to extend in the horizontal direction on the web 12W of the rail 12A, and the rack 161 and the gear 162A of the motor 162 are engaged with each other. Thus, when the motor 162 is driven, the gear 162A moves along the rack 161, so that the horizontal jib 20 moves on the rail 12A while rolling the wheels 171 and the guide wheels 73 in the longitudinal direction. .

  FIG. 19 is a plan view showing a Telha crane 100 according to another embodiment. As shown in this figure, the Telha crane 100 includes a plurality of masts 12 installed at intervals in the moving direction of the horizontal jib 20 and a pair of rails 112A spanned on top of the plurality of masts 12. ing. That is, in the Telha crane 100, the horizontal jib 20 can move not only on one mast 12 but also on one mast 12 to another mast 12. Thereby, the earth work from the material shafts 3 and the material locks 4 at a plurality of locations can be carried out with one horizontal jib 20, and the number of installed horizontal jibs 20 can be reduced.

  Here, when the horizontal jib 20 exists at a position off the mast 12 (that is, between the mast 12 and the mast 12), the conveyance mechanism 30 is controlled by a control panel (not shown) so as not to operate. . As a result, when the horizontal jib 20 is present at a position off the mast 12, it is possible to prevent an excessive load from acting on the part of the rail 112A that is off the mast 12 by carrying out the hanging work. .

  FIG. 20 is an elevational view showing the moving mechanism 250 according to another embodiment from the base end side of the horizontal jib 20. As shown in this figure, the moving mechanism 250 according to this embodiment includes a rail 212A that is longer than the rail 12A of the above-described embodiment, and a bracket 13 that connects the tip of the rail 212A and the column 12B of the mast 12. Prepare. That is, the length of the rail 212A is larger than the interval between the columns 12B arranged in the moving direction of the horizontal jib 20 of the mast 12, and the moving range of the horizontal jib 20 is larger than that of the moving mechanism 50 of the above-described embodiment. It is getting wider.

  Here, the width of the horizontal jib 20 is set to be equal to or less than half the length of the rail 212A. As a result, when the horizontal jib 20 is moved to the stopper 66 side or the stopper 76 side as much as possible, the lifting work can be performed in a space of more than half between the mast 12 and the pneumatic caisson 1. Therefore, the hanging work can be performed in the entire space between the mast 12 and the pneumatic caisson 1.

  In addition, the above-mentioned embodiment is for making an understanding of this invention easy, and does not limit this invention. It goes without saying that the present invention can be changed and improved without departing from the gist thereof, and that the present invention includes equivalents thereof. For example, in the above-described embodiment, the wheel that rolls on the rail is provided, but a spherical rolling element may be provided in the lower part of the steel frame 51.

  In the above-described embodiment, the moving mechanism 50 is provided on the upper portion of the mast 12 and the horizontal jib 20 is moved on the upper portion of the mast 12. However, the moving mechanism 50 is provided on the middle portion of the mast 12 and the mast 12 is moved. Alternatively, the horizontal jib 20 and a part of the mast 12 may be moved integrally at the intermediate portion. In this case, interference between the transport mechanism 30 and the traversing mechanism 80 and the moving mechanism 50 can be easily avoided.

1 pneumatic caisson, 2 earth and sand bucket, 3 material shaft, 4 material lock, 5 work room, 10 terha crane, 12 mast, 12A rail, 12B pillar, 12W web, 13 bracket, 14 earth and sand hopper, 20 horizontal jib, 21 I Beam, 22 rail, 23 steel, 24 scaffold, 26 fence, 28 space, 30 transport mechanism, 32 first trolley, 32A guide roller, 34 second trolley, 34A guide roller, 40 hoist mechanism, 42 hoist winch, 43 44, 45, 46 Winding sheave, 47 Winding rope, 50 Moving mechanism, 51 Steel frame, 60 Wheel unit, 61 Wheel, 62 Motor, 63 Guide wheel, 64 Cushion material, 65 Frame, 65A Side plate, 65B Side plate, 65C Upper plate, 65D support plate, 66 Stopper, 70 wheel unit, 71 wheel, 73 guide wheel, 74 cushion material, 75 frame, 75A side plate, 75B side plate, 75C upper plate, 76 stopper, 80 traverse mechanism, 81 traverse tension sheave, 82 traverse winch, 83, 84, 85, 86 Traverse sheave, 87 Overload prevention limit switch, 88 Transverse rope, 89 Traverse tension rope, 100 Telha crane, 112A rail, 150 Moving mechanism, 160 Drive mechanism, 161 Rack, 162 Motor, 162A Gear, 163 Bracket, 170 Wheel unit, 171 wheel, 175 frame, 175A side plate, 175B side plate, 175C upper plate, 212A rail, 250 moving mechanism

Claims (5)

A mast installed near the pneumatic caisson,
A horizontal jib extending horizontally from the top of the mast to above the material lock;
A transport mechanism for reciprocating a suspended load between the upper part of the mast and the tip of the horizontal jib and moving up and down in the mast and the tip of the horizontal jib;
A pneumatic caisson terha crane comprising: a moving mechanism for moving the horizontal jib in a lateral direction perpendicular to the longitudinal direction thereof. The moving mechanism is
A pair of rails provided at an upper portion of the mast and extending in a lateral direction perpendicular to a longitudinal direction of the horizontal jib;
A plurality of wheels provided on the horizontal jib to roll on the rail;
A drive mechanism for rolling the wheels;
The terha crane for a pneumatic caisson according to claim 1, further comprising: a guide mechanism that guides the wheel to move along the rail. A plurality of the masts are spaced apart in a transverse direction perpendicular to the longitudinal direction of the horizontal jib;
The moving mechanism is
A pair of rails spanning the plurality of masts;
A Telchan crane for a pneumatic caisson according to claim 1, further comprising: a drive mechanism that moves the horizontal jib along the pair of rails. The Telha crane according to any one of claims 1 to 3 is installed so that the material lock and the material shaft are positioned under the tip of the horizontal jib, and the other crane is used to It is a construction method of a pneumatic caisson that performs a suspended load work between a mast and a pneumatic caisson,
A pneumatic caisson that moves the horizontal jib by the moving mechanism so as to retract from the path of the suspended load when the suspended work is performed between the mast and the pneumatic caisson using the other crane. Construction method. A method for constructing a pneumatic caisson by installing the Telha crane according to claim 3 so that each of the plurality of masts and each of a plurality of material locks and material shafts are arranged in a longitudinal direction of the horizontal jib. And
A pneumatic caisson construction method in which a suspended work is stopped when the horizontal jib is present at a position off the mast.

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