JP2002088890A - Block carrying method, block carrying truck and block laying foundation structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide block carrying technology capable of carrying blocks stably and placing blocks on the predetermined place in a short time and efficiently. SOLUTION: A lower stage supporting member 31 and an upper stage supporting member 32 are mounted on both sides of a block 19, and a block placing section 9, which is a first lift mechanism for lifting the block 19, engaged with the lower stage supporting member 31 and a hydraulic jack 6, which is a second lift mechanism for lifting the block 19 engaged with the upper stage supporting member 32 are provided in a carrying truck 20 to support the block 19 using a block placing section 9 during the carrying of the block 19 and place the block on the predetermined place using the hydraulic jack 6 with the support of the block placing section 9 released after the truck 20 reaches the predetermined place.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for transporting and installing a block such as a box culvert used in sewerage work to a site where the block is to be installed at a construction site.

[0002]

2. Description of the Related Art For the purpose of safely and efficiently laying a block such as a box culvert in a narrow place where a crane cannot enter or under a bridge, the present applicant has disclosed in Japanese Patent Application Laid-Open No. 9-60101. Discloses a laying technique using a box culvert transfer cart.

[0003] In these laying techniques, a concrete subgrade formed at a construction site for installing a box culvert is used as a transport route of the box culvert.
The box culverts are transported and laid in sequence using a transport trolley.

[0004]

When a block is laid in a place where the entire block installation surface is not horizontal and there is a height difference in the block arrangement direction, as shown in FIG. 9, when the height difference is small, the height difference is reduced. A method of forming a block installation surface with an appropriate slope, moving the transport trolley along this block installation surface, and sequentially transporting and placing the blocks 92 is adopted.If the height difference is relatively large, The entire block installation surface is formed stepwise by alternately providing a horizontal block installation surface 93 and a vertical step 94, and the block 92 conveyed by the carrier 91 is mounted on the block installation surface using a crane 95 or the like. A method of suspending the object 93 is adopted.

However, when the entire block installation surface is stepped, a step 94 exists between the adjacent block installation surfaces 93, so that the conventional block transport and placement using the transport carriage 91 can be performed. Impossible. For this reason,
It is necessary to adopt a method in which the block 92 is lifted using the crane 95 and is sequentially hung on the block installation surface 93. However, such a method is used in a narrow place where the crane 95 cannot enter or under a bridge. Can not do it.

As described above, the conventional block transfer technology is
If there is a large difference in elevation on the block installation surface, the implementation is extremely difficult or impossible.

The problem to be solved by the present invention is that a block can be stably and safely transported and laid at a construction site having a height difference, and a block placing operation can be efficiently performed in a short time. And to provide a block transfer technique.

[0008]

In order to solve the above-mentioned problems, a block conveying method according to the present invention is directed to a conveying method capable of traveling along a traveling path formed on both sides of a surface where a concrete block such as a box culvert is to be installed. A method of loading and transporting a block on a carriage, comprising: a first elevating mechanism that attaches a lower support member and an upper support member to both side surfaces of the block, engages with the lower support member, and lifts and lowers the block; and an upper support member And a second lifting mechanism that engages with the second lifting mechanism to raise and lower the block. The first lifting mechanism is used to support the block while the block is being transported. With the support of the lifting mechanism released, the second
The block is placed on the surface to be installed using a lifting mechanism.

With this configuration, the first lifting mechanism of the carrier is engaged with the lower supporting members on both sides of the block, the block is stacked at the lowest possible position, and the block is transported to the block installation surface. After the transport trolley arrives on the block installation surface, the block is lowered using the second lifting mechanism engaged with the upper support member and is placed on the installation surface in a state where the support of the first lifting mechanism is released. Since the blocks can be placed, the blocks can be stably and safely conveyed, and the work of placing the blocks on the surface to be placed can be efficiently performed in a short time. After the work is completed, the lower support member and the upper support member can be removed from the block, so that they do not hinder the incidental work and the like, and can be used repeatedly to save material.

[0010] The second lifting mechanism may be provided on a lower supporting member. With this configuration, the first lifting / lowering mechanism, the lower supporting member, the second lifting / lowering mechanism, and the upper supporting member of the block transport vehicle are hierarchically arranged on both side portions of the block. In addition, the stability and workability in the operation of moving the block support from the first elevating mechanism to the second elevating mechanism, and the like, while supporting the block while the transport vehicle is running are improved. Further, since the load when the block is lifted by engaging the second lifting mechanism with the upper support member is supported by the first lifting mechanism via the lower support member, the load during the lifting operation by the second lifting mechanism is stable. Also excellent in safety and safety.

Next, a block carrier according to the present invention is a carrier capable of traveling along a traveling path formed on both sides of a surface where a concrete block such as a box culvert is to be installed. A first lifting mechanism and a second lifting mechanism are provided, and the second lifting mechanism is a mechanism capable of lifting and lowering the block with the support of the first lifting mechanism released. By using the block transport trolley having such a configuration, it is possible to carry out block transport at a construction site having a height difference.

Next, the block laying foundation structure of the present invention comprises:
Conveying the block by running the block carrier truck, for laying the block, a step-like block installation plan surface formed by alternately arranging a plurality of steps and horizontal planes along the block arrangement direction, A substantially flat traveling path for traveling the block transport trolley formed on both sides of the block installation scheduled surface is provided.

With such a configuration, even when the block installation surface is inclined, the transport vehicle on which the blocks are loaded travels along the substantially flat traveling path on both sides of the block installation surface. After transporting the blocks to the destination, the blocks laid on the transport trolley can be laid by placing the blocks on the horizontal surface. It can be performed efficiently.

Further, if the travel path is formed such that the height difference between the horizontal plane and the travel path on the block installation planned plane is within the range of the height difference of the step, the height between the horizontal plane and the travel path is reduced. The difference is, at most, within the range of the height difference of the step, so that if a block transporting vehicle capable of loading a block at a position higher than the height difference is provided with a block lifting mechanism having a longer lifting stroke than the height difference of the step, The laying operation can be performed easily by passing through the step portion of the installation surface.

In this case, if the traveling path is formed along a straight line connecting the intermediate points of the height differences of the steps on the horizontal plane, the difference in height between the horizontal plane and the traveling path is at most within half of the height difference of the steps. In order to fit in the step, if a block conveying mechanism capable of loading blocks at half the height of the block is provided with a block elevating mechanism having an ascending / descending stroke of half or more of the height difference of the step, the step portion of the installation plan surface can be easily formed. It will be possible to perform the laying work by passing through. In other words, the lifting / lowering stroke and the block loading height of the block lifting / lowering mechanism in the block transport trolley need only be half or more of the height difference of the step on the block installation surface, so that the size of the block transport trolley can be reduced. .

[0016]

Embodiments of the present invention will be described below with reference to the drawings. First, with reference to FIG. 1 and FIG. 2, a transport cart used in the present embodiment will be described. FIG. 1 is a perspective view of a block carrier used in the block carrier method, and FIG. 2 is a side view of the carrier shown in FIG.

In the carriage 20 shown in FIGS. 1 and 2, a pair of parallel running portions 1a and 1b each have a rectangular cross section, and a hollow portion is formed therein, and the wheel 2 is rotatable. The drive motor 3 is fixed to the base ends of the traveling parts 1a and 1b together with the speed reducer 4, respectively.
Is configured as a drive system that rotationally drives. Traveling parts 1a, 1
The driving of b can be performed by remote control using a remote control switch (not shown) connected to the driving motor 3.

A hydraulic jack 6 is fixed in the hollow portions of the traveling portions 1a and 1b, and the operation of the hydraulic jack 6 is performed by the remote control switch. An electric hydraulic pump 8 for driving the hydraulic jack 6 is provided on a bridge 7 that connects the base ends of the pair of traveling portions 1a and 1b.

Each of the traveling portions 1a and 1b is provided with a block loading portion 9 as a first lifting / lowering mechanism for lifting and lowering a concrete block 19, and the block loading portion 9 is provided with the traveling portion 1a. , 1b are formed in a U-shaped cross section so as to cover the upper surface and both side surfaces. The block stacking units 9 arranged on the left and right as described above are moved up and down by the expansion and contraction operation of the hydraulic jack 6.

Further, the traveling unit 1a is provided with a traversing device 10, and a handle (not shown) is set on a handle mounting portion 10b provided below the slide base 10a.
By manually rotating this handle, the traveling unit 1
a, 1b slide base 10a in a direction perpendicular to the running direction
Can be moved.

On the other hand, rollers 11 for moving the loaded blocks 19 smoothly in the lateral direction when the traversing device 10 is operated are provided at positions corresponding to the traversing device 10. ing.

As described above, since the transport vehicle 20 is provided with the block stacking section 9 which can lift and lower the block, and can support the block,
As will be described later, the running units 1
a, 1b are positioned, the hydraulic jack 6 is extended, and the block stacking portion 9 is engaged with the lower holding members 31 (see FIG. 4) provided on both side surfaces of the block 19, and thereafter,
The block 19 can be raised and lowered by the expansion and contraction operation of the hydraulic jack 6, and the block 19 can be supported at an arbitrary height within the range of the expansion and contraction stroke of the hydraulic jack 6.

Next, a description will be given of a block transfer method carried out using the transfer carriage 20. In the present embodiment, a block laying foundation structure as shown in FIG. 3 is formed at a construction site where the block 19 is transported and laid. This block laying basic structure includes a step-like block installation surface 25 formed by alternately arranging a plurality of steps 22 and horizontal surfaces 21 along the arrangement direction of the blocks 19,
A traveling path 23 for traveling the carrier 20 formed on both left and right sides of the block installation scheduled surface 25. The running paths 23 on both the left and right sides are
Straight line 2 connecting the intermediate point 22m of the height difference 22h of the step 22
It is formed substantially flat along 3a.

On these traveling paths 23, rails 24 on which the traveling portions 1a and 1b of the transport carriage 20 travel are provided.
Is laid, and the wheel 2 built in the traveling parts 1a and 1b
Rotates forward and backward along the rail 24, so that the entire carrier 20 moves forward and backward on the rail 24.

The outline of the block transfer method according to this embodiment is as follows.
As shown in FIGS. 4 and 5, the block 19 is
, And as shown in FIG.
3 and transports the block 19 to the destination, and after the transport trolley 20 arrives at the destination, the loaded block 19 is moved to the horizontal plane 21 of the block installation plan surface 25.
It is to be placed on top.

Hereinafter, the block transport method will be described step by step. First, a lower support member 31 and an upper support member 32 are respectively attached to the left and right side surfaces of the block 19 by bolts 3.
0, on the lower supporting member 31 located on the lower side,
A hydraulic jack 33 as a second lifting mechanism is attached. Then, as shown in FIG. 4, the traveling portions 1a,
1b is disposed so as to be located on the left and right side surfaces of the block 19, and the hydraulic jack 6 built in the traveling sections 1a and 1b is extended to raise the block loading section 9, and the lower support member 31 located on the lower side is blocked by the lower support member 31. After the loading section 9 is engaged,
Then, as shown in FIG. 4 and FIG.
9 is raised to a position higher than the block installation scheduled surface 25 and is held in that state.

In this state, the carriage 20 loaded with the blocks 19 can pass through the step 22 on the block installation surface 25, as shown in FIG. The transport cart 20 is moved forward along the travel path 23 to transport the loaded block 19 to the destination.

When the transport vehicle 20 loaded with the blocks 19 arrives at the destination point A, the hydraulic jack 33 in the state shown in FIG. 7A is extended to engage the upper support member 32 as shown in FIG. 7B. After the combination, the bolts 30 fixing the lower supporting member 31 are loosened and removed as shown in FIG. 7C, and the lower supporting member 31 is detached from the side surface of the block 19. The hydraulic jack 33 can be extended and contracted by the hydraulic pump 8 shown in FIG.

Thereafter, as shown in FIG. 7D, the hydraulic jack 33 is contracted to lower the block 19, and the block 19 is placed on the horizontal surface 21. At this time, since the lifting stroke of the hydraulic jack 33 is larger than the lifting stroke of the hydraulic jack 6, the block 19 can be placed on the horizontal surface 21 by one descent operation.

When the block 19 is placed on the horizontal surface 21, the hydraulic jack 33 is further contracted to be disengaged from the upper supporting member 32, and the bolt 30 is loosened to loosen the bolt 30.
Is removed from the block 19, the carriage 20 is retracted, and the traveling portions 1a and 1b are removed from both side surfaces of the block 19, thereby completing the block placing operation. Thereafter, if the transport carriage 20 is moved backward along the traveling path 23 and returned to the block loading site, the transport operation of the next block can be started.

After the block laying operation is completed, the lower supporting member 3
Since both the first support member 32 and the upper support member 32 can be detached from the block 19, the lower support member 31 and the upper support member 32 that have been detached are attached to the block 19 to be transported next without hindering the accompanying work. Therefore, the material can be repeatedly used, so that the material can be reduced.

FIG. 7 shows a block installation work process in the case where the destination point on which the block 19 is to be placed is immediately before the step 22a as indicated by an arrow A in FIG. Immediately after the above, the distance between the block 19 loaded on the transport carriage 20 and the horizontal surface 21 is the longest, but the up-and-down stroke of the hydraulic jack 33 is longer than this distance. Block 1
9 can be placed on a horizontal surface 21.

On the other hand, when the destination is located near the middle of the adjacent steps 22a and 22b, as shown by the arrow B in FIG. 6, the destination is loaded on the carrier 20 as shown in FIG. The distance between the block 19 and the horizontal plane 21 is smaller than that in the case of FIG. 7A, and when the destination point is immediately after the step 22b as shown by the arrow C in FIG.
As shown in FIG. 7 (b), it is the smallest, but since all of them are within the range of the vertical stroke of the hydraulic jack 33, the steps similar to those in FIG. Can be.

As described above, by engaging the block loading portion 9 of the transport carriage 20 with the lower supporting members 31 on both sides of the block 19, the block 19 is loaded as low as possible and transported to the destination. After the carriage 20 arrives on the horizontal plane 21 where the block is to be installed, the hydraulic cylinder 33 is engaged with the upper support member 32 of the block 19, and the hydraulic cylinder 33 is contracted.
Since the upper block mounting operation can be completed by one descent operation, the block 19 can be stably and safely transported, and the block mounting operation can be performed efficiently in a short time.

A hydraulic cylinder 33 is disposed on the lower supporting member 31 on both sides of the block 19,
The upper support member 32 is detachably provided above the block 3, so that the block loading section 9, the lower support member 31, the hydraulic cylinder 33 and the upper support member 32 of the carriage 20 are hierarchically provided on the left and right side surfaces of the block 19 respectively. Since it is arranged, the lifting and lowering work of the block 19, the support of the block 19 while the transporting trolley 20 is running, and the transfer of the block support from the block loading section 9 as the first lifting and lowering mechanism to the hydraulic cylinder 33 as the second lifting and lowering mechanism Excellent stability and workability. Further, the load when the block 19 is lifted by engaging the hydraulic cylinder 33 with the upper support member 32 is supported by the block loading section 9 having a structure suitable for loading the block 19, so that the stability during the operation is maintained. Also, the safety is good.

As shown in FIG. 3, since the traveling path 23 is formed along a straight line 23a connecting the intermediate point 22m of the height difference 22h of the step 22 of the block installation surface 25, the block installation surface The difference between the height of the step 25 and the height of the traveling path 23 is at most half the height difference 22h of the step 22 or less.

Therefore, the block is to be installed by using the transport carriage 20 which is provided with the hydraulic jack 33 having an ascending / descending stroke of at least half of the height difference 22h of the step 22 and can load the block 19 at a position of at least half of the height difference 22h. Face 2
5 can easily pass through the step 22 to perform the laying work. In other words, the lifting and lowering stroke of the block lifting mechanism in the transport trolley 20 and the block loading height are each equal to or less than half of the height difference 22h of the step 22 of the block installation scheduled surface 25, so that the transport trolley 20 and the like can be downsized. .

[0038]

According to the present invention, the following effects can be obtained.

(1) A lower support member and an upper support member are mounted on both side surfaces of the block, and a first lifting mechanism for lifting the block by engaging the lower support member on the carrier, and engaging with the upper support member. A second elevating mechanism for raising and lowering the block by using the first elevating mechanism during the block transport, and supporting the block. After the transport vehicle arrives at the block installation surface,
By placing the block on the planned installation surface using the second lifting mechanism with the support of the first lifting mechanism released, the block can be transported stably and safely, and the work of placing the block on the planned installation surface can be performed. It can be performed efficiently in a short time.

(2) By providing the second elevating mechanism on the lower supporting member, the elevating operation of the block, the support of the block while the carriage is running, the transfer of the block support from the first elevating mechanism to the second elevating mechanism, etc. Stability and workability are improved. Further, since the load received by the second lifting mechanism is supported by the first lifting mechanism via the lower supporting member, the stability and safety during the lifting operation by the second lifting mechanism are also excellent.

(3) A transport trolley that can travel along a travel path formed on both sides of the block installation surface is provided with a first lifting mechanism and a second lifting mechanism capable of lifting and lowering the block, and a second lifting mechanism. By making the elevating mechanism a mechanism capable of elevating the block in a state where the support of the first elevating mechanism is released, it is possible to easily carry the block even when there is a height difference at the construction site.

(4) A step-like block installation surface formed by alternately arranging a plurality of steps and a horizontal surface along the block arrangement direction, and a block transport cart formed on both sides of the block installation surface. By providing a substantially flat traveling path for traveling, it is possible to safely and efficiently perform the block laying operation using the transport trolley even when the construction site has a height difference.

(5) The travel path is formed such that the height difference between the horizontal plane and the travel path on the block installation scheduled surface is within the range of the height difference of the steps, so that the ascending and descending stroke is longer than the height difference of the steps. If a transport vehicle having a block elevating mechanism and capable of loading the blocks at a position higher than the height difference is used, it is possible to easily perform the laying work by easily passing through the step portion of the installation plan surface.

(6) The traveling path is formed along a straight line connecting the intermediate points of the height differences of the steps on the horizontal plane, thereby further reducing the up-and-down stroke of the block lifting / lowering mechanism and the block loading height in the block transport vehicle. Therefore, it is possible to reduce the size of the block transport trolley, the elevating mechanism, and the like.

[Brief description of the drawings]

FIG. 1 is a perspective view of a transport trolley used in a block transport method.

FIG. 2 is a side view of the transport vehicle shown in FIG.

FIG. 3 is a schematic diagram showing a block laying basic structure for implementing the block transport method.

FIG. 4 is a partially omitted front view showing a state where blocks are stacked on the transport vehicle shown in FIG. 1;

FIG. 5 is a side view of the transport vehicle shown in FIG.

FIG. 6 is an explanatory diagram of a process of the block transport method.

FIG. 7 is an explanatory diagram of a process of the block transport method.

FIG. 8 is an explanatory diagram of a process of the block transport method.

FIG. 9 is an explanatory view showing a conventional block transport method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1a, 1b Running part 2 Wheel 3 Drive motor 4 Reduction gear 5 Chain 6,33 Hydraulic jack 7 Bridge 8 Hydraulic pump 9 Block loading part 10 Lateral feed device 10a Slide base 10b Handle mounting part 11 Roller 19 Block 20 Carriage 21 Horizontal plane 22 , 22a, 22b Step 22h Step difference 22m Intermediate point 23 Step 23a Straight line 24 Rail 25 Planned block installation surface 30 Bolt 31 Lower support member 32 Upper support member

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[Procedure amendment]

[Submission date] July 10, 2001 (2001.7.1)
0)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Name of invention

[Correction method] Change

[Correction contents]

Patent application title: Block transport method, block transport cart and block laying basic structure

Claims (6)

[Claims] 1. A method of loading and transporting a block on a transport trolley that can travel along a traveling path formed on both sides of a surface on which a concrete block such as a box culvert is to be installed, comprising: A first elevating mechanism that attaches the lower support member and the upper support member and engages with the lower support member to elevate the block; and a second elevating mechanism that engages with the upper support member and elevates the block. Provided on the carrier, supporting the block using the first elevating mechanism during block transport, and after the carrier has arrived at the block installation surface, the support of the first elevating mechanism is released. A block transport method, wherein the block is placed on a surface to be installed using a second lifting mechanism. 2. The block transport method according to claim 1, wherein said second lifting mechanism is provided on said lower supporting member. 3. A transport trolley that can travel along a traveling path formed on both sides of a surface on which a concrete block such as a box culvert is to be installed, and a first lifting mechanism and a second lifting mechanism that can lift and support the block. A block transport trolley comprising an elevating mechanism, wherein the second elevating mechanism is a mechanism capable of elevating the block in a state where the support of the first elevating mechanism is released. 4. A block laying basic structure for transporting and laying blocks by running a block transport trolley, wherein a plurality of steps and a horizontal plane are alternately arranged along a block arrangement direction. A block laying basic structure comprising: a block-shaped block installation scheduled surface; and a substantially flat traveling path formed on both sides of the block installation planned surface for running the block transport vehicle. 5. The block laying foundation structure according to claim 4, wherein the travel path is formed such that a height difference between the horizontal plane and the travel path on the block installation scheduled surface is within a range of a height difference of the step. . 6. The block laying foundation structure according to claim 4, wherein the running path is formed along a straight line connecting midpoints of height differences of the steps.