JP2017071998A - Movable installation carriage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a movable installation carriage capable of coping with a thickness change in an arch rib with a simple constitution.SOLUTION: A movable installation carriage 1 comprises an under-supporting wagon 2 and a support frame 3. The under-supporting wagon 2 includes a pair of main materials 4 and 4 extending so as to straddle a thickness part of an arch rib 10 by sandwiching the arch rib 10 from both side surface sides, a lower frame 5 constituted so as to extend in the extension direction of the arch rib 10 under the arch rib 10 and to connect mutual lower parts of the pair of main materials 4 and 4 and supporting a load of concrete newly placed for extending the arch rib 10 and a diagonal member 6 for connecting an upper part of the main materials 4 and an end part in the extension direction of the arch rib 10 of the lower frame 5. The support frame 3 has a support part 8 placed on an upper surface of the arch rib 10, connected to the upper part of the main materials 4 and 4 and supporting a load of the under-supporting wagon 2 and a lifting mechanism 9 for lifting the under-supporting wagon 2 in the extension direction of the main materials 4.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a mobile trolley.

  2. Description of the Related Art Conventionally, a mobile trolley (construction device) for constructing an arch rib of an arch bridge is known. For example, the movable trolley disclosed in Patent Document 1 has a support-type wage that supports the load of the placed concrete with a lower frame, and moves upward along the axis of the arch rib as the arch rib extends.

  In order to support the load of the concrete, this wagegen comprises a main material extending in the thickness direction of the arch rib, a lower frame extending in the extending direction of the arch rib, and a diagonal material connecting the upper portion of the main material and the ends of the lower frame. A triangular truss is formed as an element. In general, the arch ribs are reduced in thickness in the height direction as they extend, but in the mobile trolley disclosed in Patent Document 1, in order to cope with the change in thickness, the main material and the diagonal The material has an expansion / contraction mechanism that expands / contracts its own length. By operating the telescopic mechanism, the lengths of the main material and the diagonal material can be adjusted, and the distance between the lower surface of the arch rib and the lower frame can be ensured appropriately.

JP 2000-144640 A

  However, when the lengths of the main material and the diagonal material are adjusted, the shape of the triangular truss changes, and the load applied to each part of the wagegen changes greatly. Here, depending on the case, it is necessary to reinforce the strength of the wagen, and the weight of the wageen increases. In addition, the expansion / contraction mechanism has a complicated structure and takes time and effort.

  Therefore, an object of the present invention is to provide a mobile trolley that can cope with a change in the thickness of an arch rib with a simple configuration.

  The present invention includes a pair of main members extending from both sides to sandwich an arch rib that is made by sequentially placing concrete in an arbitrary length unit and extending from both sides, and below the arch rib. The lower frame is configured to extend in the extending direction of the arch ribs and connect the lower portions of the pair of main members, and supports the concrete load newly placed for extending the arch ribs, and the upper and lower frames of the main members And a support member that supports the load of the support sword by being mounted on the upper surface of the arch rib and connected to the upper part of the pair of main members. And a support frame having an elevating mechanism that elevates and lowers the lower support word in the extending direction of the main material.

  In this movable trolley, the support frame supports the load of the support wagon, and the entire support wagon can be raised and lowered in the extending direction of the main material, so that the thickness of the arch rib can be increased without changing the shape of the support wage. Can respond to changes.

  Here, it is preferable that the lower support word is connected to the support frame so as to be swingable. Since the lower support word is swingable, it is possible to easily follow the inclination of the arch rib and the change in its angle.

  The support wage has a first diagonal member that connects the upper portion of the main member and the front end portion of the lower frame, and a second diagonal member that connects the upper portion of the main member and the rear end portion of the lower frame. It is preferable. In this case, the strength of the supporting wage is further increased.

  Moreover, it is preferable that the raising / lowering mechanism has a tension member that transmits the load of the supporting wagegen to the support part, and the lifting mechanism is suspended from the support part in the extending direction of the main material by the tension member. In this case, the elevating mechanism is driven at a position below the support part, and the reaction force in the elevating and lowering of the lower support word can be taken from the support part, so that the elevating stability is improved. At this time, the capability of a jack or the like used in the lifting mechanism may be a capability that can raise and lower the supporting wage. In other words, for a large load acting on the supporting wagon when placing concrete, a jack or the like used as the lifting mechanism can be specified by temporarily receiving it with a compression material (such as a sanddle) so that the lifting mechanism is not directly loaded. It is possible to minimize the load that can be used only for the load required for the lifting operation.

  It is preferable that the support straddle has a scaffold that extends in a direction parallel to the truss surface composed of the main material, the lower frame, and the diagonal member and is pivotable with respect to the support straddle. It is preferable that the scaffold can be rotated because the horizontality of the scaffold can be ensured in a situation where the entire movable trolley is tilted with respect to the vertical direction.

  ADVANTAGE OF THE INVENTION According to this invention, the mobile trolley | bogie which can respond to the change of the thickness of an arch rib with simple structure can be provided.

It is a side view which shows the use condition of a mobile installation trolley | bogie. It is a side view which shows the state which the supporting wage was lowered. FIG. 3 is a sectional view taken along line III-III in FIG. 2. It is a side view which shows the state which the supporting wagegen rose. It is VV sectional drawing of FIG. It is a side view which shows a scaffold. It is the elements on larger scale of FIG.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings. In addition, in each figure, the same code | symbol is attached | subjected to the same part or an equivalent part, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 1, the mobile trolley 1 of this embodiment is used for construction of an arch rib 10 in the construction of an arch bridge, and the arch rib 10 is obliquely upward from the starting point on the ground. As it is extended, it moves upward along the axis of the arch rib 10. In FIG. 1, there are three mobile installation trolleys 1, but this shows a trajectory of movement of one mobile installation trolley 1.

  In FIG. 1, a state in which the arch rib 10 is extended from the lower left portion, which is the side closer to the ground (arch abut side), toward the upper right portion, which is the side closer to the center of the bridge, is depicted. That is, concrete arch ribs 10 are extended by sequentially placing concrete C in an arbitrary length unit from the ground to complete an arch shape. In this process, every time a concrete unit is driven to some extent, the support pillar P is erected vertically upward from the existing part of the arch rib 10, and the concrete cable C is supported by stretching the slanting cable R from the top. The thickness of the arch rib 10 is thinner toward the side closer to the center of the bridge.

  The mobile trolley 1 includes a support wage 2 for providing a work place for workers and a place for placing and curing concrete C, and a support frame 3 for supporting the load of the support wage 2. The lower support wage 2 can be moved up and down with respect to the support frame 3. Since the constructed arch rib 10 is gradually reduced in thickness, as shown in FIG. 1, as the movable trolley 1 moves upward along the axis of the arch rib 10, the support wage 2 is raised, The distance between the lower surface of the arch rib 10 and the supporting wage 2 is made constant.

  Hereinafter, the mobile installation cart 1 will be described in detail. 2 and 3 show a state where the support wage 2 is lowered, and FIGS. 4 and 5 show a state where the support wage 2 is raised. For convenience of illustration, the arch rib 10 is drawn horizontally in any of the drawings, but the arch rib 10 is actually inclined, and the movable trolley 1 is also inclined accordingly. Moreover, in FIG.2 and FIG.4, illustration of the scaffold 7 (refer FIG. 6) mentioned later is abbreviate | omitted. Moreover, the formwork at the time of placing concrete C is not shown in all drawings.

  The mobile trolley 1 is a mobile trolley used for the construction of the arch rib 10, moves to the tip of the arch rib 10 along the rail 11 laid on the upper surface of the arch rib 10 being constructed, and a new concrete Provide a working place for erection.

  The lower support wagon 2 has a pair of main members 4 and 4 that sandwich the arch rib 10 from both sides (from the horizontal direction), and a lower frame configured to connect the lower portions of the main members 4 and 4 below the arch rib 10. 5.

  The main members 4 and 4 extend so as to straddle the thickness portion of the arch rib 10 with the thickness direction (vertical direction) of the arch rib 10 as the longitudinal direction, and both end portions are respectively from the height positions of the upper surface and the lower surface of the arch rib 10. It is sticking out. Each of the main members 4 and 4 has a rectangular frame in a side view (see FIG. 2), and a lifting mechanism 9 described later is accommodated in the frame. In the substantially central part of the main members 4 and 4 in the longitudinal direction, the two members (long members 41 and 41) that extend in parallel with the longitudinal direction of the frame and constitute the frame are bridged. A single support member 42 is provided.

  The lower frame 5 is located below the arch rib 10, and provides a work place for newly placing and curing the concrete C for the extension of the arch rib 10, and supports the load of the concrete C. The lower frame 5 extends in the extending direction of the arch rib 10 and also extends in the width direction of the arch rib 10 and has a rectangular shape in plan view. A substantially central portion in a side view of the lower frame 5 is coupled to the lower portions of the pair of main members 4, 4, thereby connecting the lower portions of the pair of main members 4, 4.

  The lower frame 5 has a frame shape with members extending in the height direction so as to have a predetermined thickness. The frame shape has a thickness that increases from both ends in the extending direction of the arch rib 10 toward the central portion (portion connected to the main members 4 and 4) (see FIG. 2), and the width of the arch rib 10 The direction is configured to be a front-view rectangle (see FIG. 3). A plurality of support columns 51 and braces 52 extending in the height direction are erected inside the frame shape to ensure the strength of the frame shape.

  A jack 53 extending upward and a roller 54 rotating in the extending direction of the arch rib 10 are attached to the upper surface of the rear end of the lower frame 5. By adjusting the expansion / contraction amount of the jack 53, the roller 54 can be brought into contact with the lower surface of the arch rib 10, or the roller 54 can be separated from the lower surface of the arch rib 10. As a result, the jack 53 bears the load when the concrete C is placed, and the roller 54 bears the load when the movable trolley 1 moves. 2 to 5 illustrate a state in which the jack 53 is extended to contact the lower surface of the arch rib 10 and the roller 54 is separated from the lower surface of the arch rib 10.

  Further, the supporting wage 2 has a diagonal member 6 for forming a truss surface together with the main material 4 and the lower frame 5. That is, the supporting wage 2 includes a first diagonal member 6a that connects the upper portion of the main member 4 and the front end portion of the lower frame 5 in the extending direction of the arch rib 10, and the upper end portion of the main member 4 and the rear end portion of the lower frame 5. And a second diagonal member 6b.

  The support frame 3 includes a support portion 8 placed on the upper surface of the arch rib 10 and an elevating mechanism 9 that raises and lowers the lower support wage 2 in the extending direction of the main members 4 and 4.

  The support portion 8 is placed on a rail 11 laid on the upper surface of the arch rib 10, and a carriage portion 81 in which wheels 87 are disposed on the back surface (lower surface), and the extending direction of the arch rib 10 in the carriage portion 81. It has a pair of support | pillar parts 82 and 82 each standingly arranged by the front part and the side close | similar to a pair of main materials 4 and 4, and the beam material 83 spanned between the upper part of a pair of support | pillar parts 82 and 82 In addition, a support diagonal member 84 is provided between the top of the support column 82 and the carriage unit 81 so as to be inclined.

  Moreover, the support part 8 is connected with the upper part of the main materials 4 and 4 in the side surface at the side of the main materials 4 and 4 of a pair of support | pillar parts 82 and 82, respectively. Specifically, a support plate 85 is provided inside the frame body of the pair of main members 4 and 4 and above the support member 42 so as to be slidable with the inner side surfaces of the long members 41 and 41 of the frame body. The support plate 85 and the support column portion 82 are coupled by a pin 86. The slide of the inner surface of the long members 41 and 41 and the support plate 85 defines the trajectory when the lower support word 2 is raised and lowered, and the connection at the pin 86 causes the lower support word 2 to swing relative to the support frame 3. It is possible to move.

  The elevating mechanism 9 has two fully threaded PC steel bars (tension members) 91 and 91 that extend through the support plate 85 in the vertical direction on both sides of the pin 86 and extend downward in the extending direction of the main material 4. doing. The all screw PC steel bars 91 and 91 further penetrate the support member 42 and extend downward, and are coupled to a support block 92 provided so as to be slidable with the inner surface of the long members 41 and 41. . A lifting hydraulic jack 93 is fixed to the upper surface of the support block 92, and the upper end of the head is in contact with the lower surface of the support member 42. The lifting hydraulic jack 93 can be expanded and contracted in the extending direction of the main material 4 and upward.

  As described above, the all-screw PC steel bars 91, 91 connect the support plate 85 and the support block 92, so that the lifting mechanism 9 is suspended from the support portion 8. The mutual positional relationship is determined as a state where the block 92 is kept at a predetermined distance. In the portion of the support member 42 where the all-screw PC steel rods 91 and 91 are penetrating, a through-hole having a diameter larger than the diameter of the all-thread PC steel rods 91 and 91 is opened in the support member 42. It does not interfere with the lifting / lowering of the wagen 2.

  Further, the supporting wage 2 has a scaffold 7 that extends in a direction parallel to the truss surface composed of the main material 4, the lower frame 5, and the diagonal material 6 on both sides of the arch rib 10 as shown in FIG. 6. Have. The scaffold 7 is fastened to the main material 4 by a pin 71 at a position where the main material 4 and the lower frame 5 intersect (see also FIGS. 3 and 5), and can be rotated with respect to the supporting wage 2. The scaffold 7 is necessary for the worker to perform formwork installation, concrete C placement and curing, and other work, and can be assembled vertically and horizontally according to the scene. In FIG. 6, an example of the minimum configuration of the scaffold 7 is indicated by a solid line, and an expanded example is indicated by a two-dot chain line.

  Next, a method for raising and lowering the support wage 2 will be described. In the following description, one side surface side of the arch rib 10 is described, but the actual operation of the lifting mechanism 9 is simultaneously performed on the lifting mechanisms 9 and 9 on both side surfaces of the arch rib 10.

  In constructing the arch rib 10, it is usual to reduce the thickness as the arch rib 10 is extended. Reducing the thickness of the arch rib 10 means that the distance between the lower surface of the arch rib 10 and the lower frame 5 is increased. If this interval is too wide, the concrete C placing work will be hindered. Therefore, it is necessary to adjust the interval so as to close it.

  When raising the supporting wage 2 from the lowered state shown in FIGS. 2 and 3 to the elevated state shown in FIGS. 4 and 5, the lifting hydraulic jack 93 is operated to extend. When the head of the lifting hydraulic jack 93 moves in the extending direction of the main material 4 and upward, a reaction force is applied to the support frame 3 via the tension of the all-screw PC steel bars 91, 91, and the lifting hydraulic jack 93 The support member 42 that is in contact with the upper end of the head portion 93 is pushed upward. Since the support member 42 is a part of the main material 4 and the lower frame 5 and the first and second diagonal members 6a and 6b are coupled to the main material 4, the support member 42 is pushed upward. As a result, the whole supporting wage 2 rises. At this time, the support block 92 and the support plate 85 slide with respect to the inner surfaces of the long members 41 and 41 constituting the frame body of the main material 4.

  At this time, the elevating mechanism 9 is not changed except that the elevating hydraulic jack 93 is extended, and the positions of the all screw PC steel bars 91 and 91 and the support block 92 are not changed. Further, the positional relationship between the support plate 85 on the support portion 8 side and the support block 92 has not changed.

  In addition, when it is not possible to secure the ascending distance of the supporting wage 2 only by the extension of the lifting / lowering hydraulic jack 93, all the screw PC steel rods 91 and 91 are wound in advance to raise the position of the support block 92 ( That is, after the distance between the support plate 85 and the support block 92 is shortened), the lifting hydraulic jack 93 is extended.

  In addition, in the state in which the supporting wage 2 is raised, as shown in FIG. 7, the connecting member 43 and the support plate 85 that connect the long members 41, 41 of the frame body of the main material 4 at the upper part. The sandle material 44 may be packed in the space. Thereby, the site | part which supports the load of the supporting wage 2 can be disperse | distributed.

  When lowering the lower support wage 2, the lifting hydraulic jack 93 is operated and contracted so that the head of the lifting hydraulic jack 93 moves in the extending direction of the main material 4 and downward. Then, the lower support wage 2 descends by its own weight as the hydraulic jack 93 for lifting is reduced.

  In the mobile trolley 1 described above, the support frame 3 supports the load of the lower support word 2 and the entire lower support word 2 can be moved up and down in the extending direction of the main members 4, 4. It is possible to cope with a change in the thickness of the arch rib 10 without changing. That is, since the shape of the truss surface formed by the support wage 2 does not change, the change in the load applied to each part of the support wage 2 due to raising and lowering can be minimized, and the strength of the support wage 2 is specially increased. There is no need to reinforce. Further, since the lifting operation is only the operation of the lifting hydraulic jack 93, the operation is simple.

  Further, since the lower support wage 2 is connected to the support frame 3 so as to be swingable, it can easily follow the inclination of the arch rib 10 and the change in its angle. At this time, the jack 53 and the roller 54 attached to the rear end side of the lower frame 5 contribute to the movement of the movable gantry 1 and the stability of the posture.

  Further, the supporting wage 2 is a first diagonal member 6a that connects the upper part of the main member 4 and the front end of the lower frame 5, and a second member that connects the upper part of the main member 4 and the rear end of the lower frame 5. Therefore, the overall strength of the supporting wage 2 is high.

  The elevating mechanism 9 has fully threaded PC steel bars 91 and 91 that transmit the load of the supporting wage 2 to the support part 8. The elevating mechanism 9 is connected to the main support part 8 by the fully threaded PC steel bars 91 and 91. Since it is suspended in the extending direction of the material 4, the lifting mechanism 9 is driven at a position below the support portion 8, and the reaction force in the lifting and lowering of the support wage 2 can be taken from the support portion 8. Therefore, the lifting stability is improved.

  Further, since the scaffold 7 included in the support wage 2 can be rotated, the horizontality of the scaffold 7 can be ensured in a situation where the entire movable trolley 1 is tilted with respect to the vertical direction.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment. For example, in the above embodiment, the support wage 2 and the support frame 3 are connected via the support plate 85 and the pin 86. However, if the support wage 2 can swing with respect to the support frame 3, the connection method is as follows. Other embodiments may be used.

  Further, in the above embodiment, the support portion 8 in the support frame 3 is integrated with the two strut portions 82 and 82 standing on the one carriage portion 81 and the beam member 83 being bridged between the upper portions thereof. Although the mode which was made was shown, the support | pillar parts 82 and 82 should just have the intensity | strength which becomes independent, respectively, and may be erected on the cart independent from each other.

  Moreover, in the said embodiment, although the position of the raising / lowering mechanism 9 was made into the position lower than the support plate 85 among the frame bodies of the main material 4, it is good also as a position higher than the support plate 85. FIG. For example, a lifting hydraulic jack 93 may be disposed on the upper surface of the support plate 85, and its head may be brought into contact with the lower surface of the connecting member 43. In this case, the all-thread PC steel bars 91 and 91 and the support block 92 are unnecessary.

  DESCRIPTION OF SYMBOLS 1 ... Moving construction trolley, 2 ... Under support wage, 3 ... Support frame, 4 ... Main material, 5 ... Lower frame, 6 (6a, 6b) ... Diagonal material, 7 ... Scaffold, 8 ... Support part, 9 ... Lifting mechanism, DESCRIPTION OF SYMBOLS 10 ... Arch rib, 91 ... Full thread PC steel bar (tensile member, raising / lowering mechanism), 92 ... Support block (elevating mechanism), 93 ... Hydraulic jack for raising / lowering (elevating mechanism), C ... Concrete.

Claims (5)

A pair of main materials extending across the thickness part of the arch ribs, sandwiching the arch ribs that are sequentially placed and extended in an arbitrary length unit from both sides, and below the arch ribs, A lower frame that extends in the extending direction of the arch ribs and connects the lower portions of the pair of main members, and supports a load of the concrete newly placed for extending the arch ribs, and an upper portion of the main members And a diagonal member connecting the ends of the arch ribs in the extending direction of the lower frame, and a supporting wage
A support portion that is placed on the upper surface of the arch rib and connected to the upper portions of the pair of main members, and supports a load of the lower support word, and an elevating mechanism that raises and lowers the lower support word in the extending direction of the main material. And a support frame having a movable trolley.   The movable gantry according to claim 1, wherein the lower support wagon is swingably connected to the support frame.   The supporting wagegen includes a first diagonal member that connects the upper portion of the main member and the front end portion of the lower frame, and a second diagonal member that connects the upper portion of the main member and the rear end portion of the lower frame. The mobile construction vehicle according to claim 1 or 2, comprising: The elevating mechanism has a tension member that transmits a load of the support wagegen to the support part,
The movable elevating carriage according to any one of claims 1 to 3, wherein the lifting mechanism is suspended from the support portion in the extending direction of the main material by the tension member.   The said supporting wagon has a scaffold provided in a direction parallel to a truss surface composed of the main material, the lower frame, and the diagonal material and rotatably provided with respect to the supporting wagon. The movable installation cart as described in any one of -4.

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