JP2011026069A - Concrete product carrying and placing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a concrete product carrying and placing device having greatly improved controllability and handling property. <P>SOLUTION: The concrete product carrying and placing device includes a travelling operation part 10 having a pair of rear wheels 12, a concrete product handling part 20 connected to the front part of the travelling operation part, and having a main frame 21 having a telescopic frame 22 and an up-and-down movable table 24 mounted on the main frame, and a ride-over mechanism 30 provided movably up and down at the front end of the handling part, and having a front wheel 41. The main frame is turnably connected to the front part of the travelling operation part so that the pair of rear wheels and the front wheel can be self-propelled and steered. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a transport laying apparatus that transports and lays concrete products such as box culverts, large fume pipes, propulsion pipes, and split concrete pipes.

  This type of conveyor laying device has a cargo handling section for loading concrete products and a traveling section for running the cargo handling sections, and when the concrete products are installed at an accurate position or along a meandering conveyance path. In doing so, the minimum turning radius of the transport laying apparatus is greatly affected.

As shown in FIGS. 12 and 13, Patent Document 1 discloses a transport laying device having a pin hinge structure in which the cargo handling portion 80 and the traveling portion 90 are connected by a vertical pin 92 in order to reduce the minimum turning radius. .
The cargo handling unit 80 is movable up and down at both ends thereof and includes a pair of left and right front wheels 81 and a rear wheel 82, and the traveling unit 90 includes a pair of left and right drive wheels 91 for self-propelling.
The cargo handling unit 80 includes a holding unit 89, and the holding unit 89 can be mounted on the cargo handling unit 80 by holding the bottom surface of the concrete product A to be installed.
Further, a pair of left and right steering cylinders 93 are arranged in a plane C shape between the cargo handling unit 80 and the traveling unit 90, and the pair of steering cylinders 93 can be expanded and contracted according to the steering of the drive wheels 91. The turning radius of the cargo handling unit 80 is controlled.

In order to cope with the installation of the concrete product A, the front end portion of the cargo handling unit 80 is provided with a climbing mechanism for getting on and off the bottom of the concrete product.
The climbing mechanism described in Patent Document 1 includes a plurality of cylinders 81a and 83a provided vertically at the front end portion of the cargo handling portion 80, a front wheel 81 and an auxiliary front wheel 83 provided at the lower ends of the cylinders 81a and 83a, and concrete. When getting on and off the bottom of the product, the cylinders 81a and 83a alternately expand and contract, and the front wheel 81 and the auxiliary front wheel 83 move up and down.

In addition, Patent Documents 2 and 3 disclose other climbing mechanisms that do not depend on a vertical cylinder.
As shown in FIG. 14, the climbing mechanism described in Patent Document 2 includes a three-pronged wheel holding plate 84 that is rotatably supported via a support shaft 85 at the front end portion of the cargo handling portion 80, and one wheel holding plate 84. The front wheel 81 and the auxiliary front wheel 83 are provided, and the front wheel 81 and the auxiliary front wheel 83 are moved up and down by expansion and contraction of the cylinder S ₁ provided between the cargo handling unit 80 and the wheel holding plate 84.

As shown in FIG. 15, the climbing mechanism described in Patent Document 3 includes two wheel holding plates 86 and 87 that are rotatably supported on a front end of the cargo handling unit 80 via a common support shaft 85, and each wheel holding plate. A pair of left and right front wheels 81 and a pair of left and right auxiliary front wheels 83 provided at the free ends of 86 and 87, and expansion and contraction of the cylinders S ₂ and S ₃ provided between the cargo handling portion 80 and the wheel holding plates 86 and 87. As a result, the front wheel 81 and the auxiliary front wheel 83 are raised and lowered individually.

In general, it is desirable to handle a plurality of sizes of concrete products A with a single transport laying device. To achieve this, the overall height of the climbing mechanism is kept low so that the climbing mechanism does not collide with the top of the concrete product A. There is a need to.
On the other hand, in order for the climbing mechanism to get on and off the bottom of the concrete product A, it is necessary to raise and lower the front wheel 81 and the auxiliary front wheel 83 to a height equal to or greater than the thickness of the bottom of the concrete product A.

JP 2005-132331 A JP 2002-293396 A JP 2003-182987 A

The conventional transport laying apparatus has the following problems.
(1) In the conveying and laying device described in Patent Document 1, since the traveling unit 90 and the cargo handling unit 80 are connected by a pin hinge, the front wheel 81 and the rear wheel 82 are secured in order to ensure the stability of the cargo handling unit 80. Since the auxiliary front wheels 83 each have two wheels on the left and right, for a total of six wheels, the device cost increases.
(2) In the transporting and laying device described in Patent Document 1, the traveling unit 90 and the cargo handling unit 80 are connected by a pin hinge structure. I have to cut it.
For example, in the same way as when driving a large trailer vehicle in reverse, when it is desired to advance the cargo handling unit 80 to the right, the traveling unit 90 must be steered to the left, which requires a highly skilled maneuvering ability. No one can drive easily.
(3) Although the conveyance laying device described in Patent Document 1 can reduce the turning radius as compared with a device that does not have a pin hinge structure, for example, it cannot perform lateral movement in a direction perpendicular to the traveling direction.
Therefore, in order to adjust the position of the concrete product in the left-right direction during installation, it is necessary to repeat the forward and backward movement of the transport laying device and the turning of the handle, and fine adjustment of the laying position in the left-right direction is also difficult.
(4) In the climbing mechanism described in Patent Document 1 in which a cylinder is vertically arranged at the front end portion of the cargo handling portion 80, the minimum overall length of the cylinders 81a and 83a is increased in order to ensure the lifting distance of both front wheels 81 and 83. As a result, the overall height of the climbing mechanism increases.
Depending on the size of the concrete product, the upper parts of the cylinders 81a and 83a projecting upward from the cargo handling unit 80 collide, so that the number of sizes of the concrete product that can be transported by one transport laying device is limited to a small number.
(5) get over mechanism described in Patent Documents 2 and 3, by disposing the cylinder S ₁ to S ₃ obliquely, is suppressed to a small impact on the overall height of the mechanism overcoming the entire length of the cylinder S ₁ to S ₃ There are advantages.
On the other hand, the elevating radius of the wheel holding plates 84, 86, 87 and the front wheel 81 around the support shaft 85 cannot be made smaller than the linear distance from the support shaft 85 due to the mechanism.
Therefore, a part of the wheel holding plates 84, 86, 87 that move up and down around the support shaft 85, or the front wheel 81 jumps out above the cargo handling portion 80, so that the overall height of the climbing mechanism increases.
Therefore, the number of sizes of concrete products that can be transported is limited to a small number even in the transport laying apparatus having the climbing mechanism described in Patent Documents 2 and 3.

The present invention has been made in view of the above points, and an object thereof is to provide at least one of the following transport laying apparatuses.
<1> Anyone can easily operate without requiring a highly skilled maneuvering ability.
<2> The concrete product can be easily aligned in the left-right direction.
<3> Increase the number of sizes of concrete products that can be transported by a single transport laying device while keeping the overall height of the climbing mechanism low.

1st invention of this application has the driving | running | working driving | running part which comprised a pair of rear wheels, the main frame which has an expansion-contraction frame connected to the front part of this driving | running | working driving | running | working part, and the vertically movable table mounted in this main frame. A loading and unloading device that is provided on a table and transports a concrete product, the loading and unloading device having a loading and unloading mechanism provided at a front end of the loading and unloading portion and having a front wheel. It is connected to the front portion so as not to rotate, and the pair of rear wheels and front wheels are capable of traveling and steerable.
According to a second invention of the present application, in the first invention, the climbing mechanism is provided downward on a frame of the cargo handling portion, and an extendable intermediate support leg, a front wheel traveling portion having a front wheel, a frame front end of the cargo handling portion, and the front wheel An elevating unit interposed between the traveling units and elevating and lowering the front wheel traveling unit corresponding to the expansion and contraction of the intermediate support leg, and the elevating unit is between the front part of the telescopic frame and the rear part of the front wheel traveling unit And a link mechanism that is pivotably connected to the upper and lower sides, and an elevating cylinder pivotally supported between the front part of the telescopic frame and the rear part of the front wheel traveling part.
A third invention of the present application is characterized in that, in the first or second invention, the pair of rear wheels and front wheels can be steered in a range of 90 degrees left and right at the maximum.
According to a fourth aspect of the present invention, in any one of the first to third aspects, the concrete product is a concrete cylinder having both ends open.

According to the present invention, at least one of the following effects can be obtained.
<1> The rigidity of the entire transport laying apparatus can be increased by fixing the main frame of the cargo handling section to the driving section without adopting the pin hinge structure.
Therefore, the rear wheel 82 of the conventional transport laying apparatus shown in FIGS. 12 and 13 can be omitted.
In addition, the main frame of the cargo handling section is fixed to the driving section, so there is no need to steer the steering wheel in the reverse direction when traveling, and anyone can easily lay and transport without requiring skilled advanced steering capabilities The device can be operated.
<2> Conventionally, it has been necessary to repeat the forward and backward movement of the transport laying apparatus and the turning of the handle for centering the concrete product.
In the transport laying apparatus according to the present invention, the front wheel can be driven together with the rear wheel, and the structure can be steered, so that the transport laying apparatus can be laterally moved on the spot. Can be done accurately.
<3> The conveying and laying apparatus according to the present invention keeps the overall height of the climbing mechanism low so as to correspond to the minimum size of the concrete product.
Therefore, it becomes possible to greatly increase the number of sizes of concrete products that can be transported by a single transport laying apparatus as compared with the prior art.

Model diagram of transport laying apparatus according to the present invention View of arrow II in FIG. Perspective view of the climbing mechanism with part of the cargo handling section broken Side view of the crossing mechanism with part of the cargo handling section broken Explanatory drawing of the operation of the transport laying device Explanatory drawing of the operation of the transport laying device Explanatory drawing of the operation of the transport laying device Explanatory drawing of the operation of the transport laying device Explanatory drawing of the operation of the transport laying device Explanatory drawing of the operation of the transport laying device Explanatory drawing of the operation of the transport laying device Model diagram of conventional transport laying equipment FIG. 12 is a plan view of the conventional transport laying apparatus shown in FIG. Model diagram of conventional transfer laying device overpass mechanism Model diagram of other transfer mechanism of conventional transport laying device

Hereinafter, a concrete product conveying and laying apparatus according to the present invention will be described with reference to the drawings.
Further, in the description, the forward side of the transport laying device is defined as “front”, the reverse side is defined as “rear”, and the crossing direction with respect to the straight traveling of the transport laying device is defined as “left and right”.
The concrete product A to be transported is a concrete cylinder having both ends open, and includes, for example, a box culvert, a large fume pipe, a propulsion pipe, a split concrete pipe, and the like.

<1> Conveying and Laying Device As shown in FIGS. 1 and 2, the conveying and laying device according to the present invention is a device for carrying and transporting a concrete product and for laying the concrete product A at an installation site, and an operation traveling unit. 10, a cargo handling unit 20 integrally connected to the driving traveling unit 10, and a climbing mechanism 30 provided at the front end of the cargo handling unit 20 so as to be movable up and down.

The transport laying device according to the present invention is configured such that the front and rear traveling wheels can be independently driven and steered to reduce the turning radius, and a link is applied to the overpass mechanism 30 to increase the overall height of the overpass mechanism 30. It is in keeping it low.
Hereinafter, the main part of the transport laying apparatus will be described in detail.

<2> Driving Travel Unit The driving travel unit 10 is a part that has both a travel control function of the transport laying device, a control function of the cargo handling unit 20, and a control function of the crossing mechanism 30.

<2.1> Driving operation panel The driving traveling unit 10 includes a driving operation panel 11.
By operating a plurality of operating handles, levers, buttons, etc. provided on the driving operation panel 11, traveling operation of the transport laying device (forward / reverse switching, shifting, stopping, steering, etc.) and concrete in the cargo handling unit 20 The raising / lowering operation of the product A and the climbing operation by the climbing mechanism 30 can be controlled individually or simultaneously. These controls can be performed by well-known electric control and / or hydraulic control.

<2.2> Drive Source A drive source such as a storage battery, a generator, or hydraulic equipment may be mounted on the driving traveling unit 10 or may be installed separately from the driving traveling unit 10.

<2.3> Rear Wheel Further, the driving traveling unit 10 has a pair of left and right rear wheels 12 and 12.
The rear wheels 12 and 12 are wheels that can be driven forward and backward by receiving a driving force of a drive source such as an electric or hydraulic motor (not shown) and can be steered. Is possible.

<3> Cargo Handling Unit The cargo handling unit 20 is a part that is inserted and mounted in the concrete product A, and a main frame 21 that extends horizontally from the front surface of the driving traveling unit 10 and a telescopic frame that is inserted in the main frame 21 so as to be extendable. 22, a table 24 mounted on the main frame 21 through a plurality of cargo handling cylinders 23 so as to be movable up and down, and intermediate support legs 25 provided at the front end of the main frame 21 so as to be extendable on both the left and right sides.
The main frame 21 has a length equal to or greater than the total length of the concrete product A.

<3.1> Frame The main frame 21 is fixed to the front surface of the driving traveling unit 10 so as not to rotate.
The fact that the main frame 21 is fixed to the driving travel unit 10 without adopting the pin hinge structure is to increase the rigidity of the entire transport laying device to reduce the number of wheels and to steer the steering wheel in the opposite direction when traveling. This is to make it possible for anyone to easily operate the transport laying device without the need for skilled high-level maneuverability.

  The telescopic frame 22 can be expanded and contracted with respect to the main frame 21 by a known slide mechanism such as a hydraulic cylinder or a gear mechanism provided in the main frame 21.

<3.2> Cargo Handling Cylinders A plurality of cargo handling cylinders 23 that support the lower surface of the table 24 are vertically installed with both frames 21 and 22 inserted at predetermined intervals. The height of the top and bottom can be adjusted.
A notch 22a is formed in the telescopic frame 22 through which the cargo handling cylinder 23 is inserted, so that the cargo handling cylinder 23 does not interfere with the expansion and contraction of the telescopic frame 22.

Among the standard sizes of a plurality of concrete products A, a cylinder with a short stroke is sufficient for the cargo handling cylinder 23 so that the internal space height (inner height) can correspond to the minimum size concrete product A.
The reason why the overall length of the cargo handling cylinder 23 is shortened is to cope with the reduction in the overall height of the climbing mechanism 30 as will be described later.
If the cargo handling cylinder 23 is set to a dimension that can accommodate the minimum size concrete product A, the stroke length of the cargo handling cylinder 23 can be achieved simply by mounting a bulking spacer member on the table 24. It is possible to mount even a large concrete product A exceeding the limit.

<3.3> Intermediate Support Legs Intermediate support legs 25, 25 made of a hydraulic cylinder or the like are disposed vertically on the left and right sides of the front end portion of the main frame 21.
The intermediate support legs 25 do not have a running function, are normally in a contracted state, and extend and contract when the concrete product A is climbed in cooperation with the climbing mechanism 30.

<4> Overpass mechanism In order to cope with the installation of the concrete product, a front and rear mechanism 30 for getting on and off the bottom of the concrete product is provided at the front end of the telescopic frame 22.
The climbing mechanism 30 includes the intermediate support leg 25 provided at the front end of the main frame 21, a front wheel traveling unit 40, and an elevating unit 50 that raises and lowers the front wheel traveling unit 40.

<4.1> Front Wheel Travel Unit The front wheel travel unit 40 includes a front wheel 41 and a drive unit 42 that incorporates an electric or hydraulic motor or the like.
The front wheel 41 is a steerable wheel that can travel forward and backward, and can be steered in the range of 90 degrees at the maximum, for example.
If an encoder is incorporated in the rear wheel 12 and the front wheel 41, steering at a more accurate angle is possible.

  The reason why the front wheel 41 can be steered together with the rear wheel 12 is to make the turning radius of the transport laying device very small and to simplify the driving operation, and the front wheel 41 together with the rear wheel 12 is configured to be driven. This is to improve the position adjustment performance when laying the concrete product by running the front side and / or the rear side of the transport laying device in the same direction in the left or right direction or in different directions.

The front wheel 41 is preferably a single wheel, but may be a double wheel.
In consideration of stability during running, turning radius, etc., a three-wheel configuration of two rear wheels and one front wheel is desirable.

<4.2> Elevating Unit As shown in FIGS. 3 and 4, the elevating unit 50 disposed between the front part of the telescopic frame 22 and the rear part of the front wheel traveling unit 40 includes a plurality of links 51 and elevating cylinders 52. It has.

<4.2.1> Link Mechanism Brackets 27 and 44 project from the front face plate 26 of the front part of the telescopic frame 22 and the rear face plate 43 provided at the rear part of the drive part 42. Both ends of the link 51 are pivotally supported via horizontal pins 31 and 32.
The plurality of links 51 can rotate up and down around the horizontal pin 31 on the front plate 26 side.
The reason why the plurality of links 51 that are connected between the telescopic frame 22 and the front wheel traveling unit 40 are arranged in a multistage manner is to move the front wheel traveling unit 40 up and down while maintaining the levelness.

<4.2.2> Elevating Cylinder Brackets 28 and 45 project from the center upper part of the front plate 26 and the center lower part of the rear plate 43, respectively.
The raising / lowering cylinder 52 pivotally supports the main body 52a so that it can swing up and down by a support shaft 33 pivotally supported on the bracket 28 of the front plate 26, and horizontally between the tip of the rod 52b and the bracket 56 of the rear plate 43. The pins 34 are connected.

Therefore, when the lifting cylinder 52 is contracted, the front wheel traveling unit 40 is lifted and floated at the front end of the telescopic frame 22, and when the lifting cylinder 52 is expanded, the front wheel traveling unit 40 is lowered at the front end of the telescopic frame 22.
The extension amount of the elevating cylinder 52 can be controlled according to the landing height of the front wheel 41.

The reason why the elevating cylinder 52 is disposed on the opposing surfaces of the telescopic frame 22 and the front wheel traveling unit 40 facing each other is to be able to swing up and down in order to keep the height of the main body 52a of the elevating cylinder 52 low.
The height from the road bed surface B to the uppermost end of the climbing mechanism 30 when the climbing mechanism 30 is raised is set to a dimension that does not collide with the ceiling portion of the minimum size concrete product A.
That is, the elevating part 50 is constituted by a combination of the link mechanism and the inclined elevating cylinder 52, so that the elevating part 50 enters the interior without colliding even if the inner space of the concrete product A is narrow in the height direction. Because.

[Action]
Next, a method for laying the concrete product A ₁ using the transport laying apparatus will be described with reference to FIGS.

<1> by the running of the handling portion of the entry Figure 5 to 7 rearward from the conveying laying apparatus of the concrete product A ₁ of the conveyor will operate the driving operation panel 11 of the driver travel unit 10, get over mechanism 30 and the cargo handling section 20 We are shown the steps up to enter the concrete products a _1.

<1.1> Floating front wheel In detail, after the transportation laying apparatus approaches and stops the concrete product A ₁ placed on the road floor B, the intermediate support leg 25 is extended to the road floor B. Land.
Next, the raising / lowering part 50 is lifted up so that the front wheel 41 rises to a height at which it does not collide with the bottom of the concrete product A ₁ .
At this time, the weight of the transport laying device is supported by the rear wheel 12 and the intermediate support leg 25 that have landed on the floor surface B.

<1.2> Internal landing of front wheel Extend the telescopic frame 22 until the front wheel 41 enters the concrete product A ₁ , and move the elevating part 50 downward to bring the front wheel traveling part 40 into the bottom inner surface of the concrete product A ₁ . Land on.
The intermediate support legs 25 are contracted to support the weight of the transport laying apparatus with the rear wheels 12 and the front wheels 41.

<1.3> Internal Movement As shown in FIG. 6, the rear wheel 12 and the front wheel 41 are driven forward to cause the climbing mechanism 30 and the cargo handling unit 20 to enter the concrete product A ₁ .
At this time, as the table 24 does not collide with the concrete products A _1, loading cylinder 23 is in a contracted state.

When the rear wheel 12 that has landed on the road surface B and the front wheel 41 that has landed on the bottom surface of the concrete product A ₁ are driven forward, the front wheel 41 is stopped and the telescopic frame 22 is contracted in accordance with the forward driving of the rear wheel 12. The front wheel 41 may be driven forward together with the rear wheel 12 when the telescopic frame 22 completes contraction.

<1.4> external landing wheels 41 of the front wheels is reached near the end of the drawing right of concrete products A _1, stops the travel of the conveyor laying device.
Next, as shown in FIG. 7, after by decompressing the intermediate support legs 25 of the handling portion 20 is landed on the bottom inner surface of the concrete product A _1, the floor of the front wheel driving unit 40 to increase operating the elevating unit 50 From the surface.
After extending the telescopic frame 22 and projecting the front wheel traveling portion 40 outward from the left end of the concrete product A _{1 in} the drawing, the elevating portion 50 is lowered to land the front wheel 41 on the road surface B.
After contracting the intermediate support leg 25, the front wheel 41 is stopped, and the telescopic frame 22 is contracted in accordance with the forward drive of the rear wheel 12.

<2> the concrete product A ₁ inwardly by the loading cylinder 23, as shown in following FIG lifting concrete products extends to raise the table 24 by handling portion 20 in contact with the ceiling surface of the concrete product A ₁ Lift from.
The weight of the transport laying device and the concrete product A ₁ is supported by the three wheels of the rear wheel 12 and the front wheel 41.

<3> carried traveling conveyor laying device travels to a laying position while mounted concrete product A _1.
Since the transport laying device can steer the rear wheel 12 and the front wheel 41, even if the travel route is meandering or the meandering radius is small, the transport laying device can be operated smoothly without turning the handle in the reverse direction.

Furthermore, since it corresponds to the concrete product A ₁ having a long axial length, the front and rear wheels 12 and the front wheel 41 can be driven and steered by the rear wheel 12 and the front wheel 41 even when the main frame 21 of the cargo handling unit 20 is lengthened. Therefore, it is possible to steer with a small radius of curvature without being affected by the distance between the rear wheels 12 and the front wheels 41.

Performing centering of concrete products A ₁ with respect to <4>Shin'awase Concrete When the product A ₁ conveyed to installation position existing concrete product A _2.

  Although it has been necessary to repeat the forward and backward movement of the conventional transport laying apparatus and the turning of the handle, the present invention does not need to repeat the forward and backward movement of the transport laying apparatus.

As shown in FIG. 2, the transport laying apparatus according to the present invention can drive the front wheels 41 together with the rear wheels 12 and can steer each of the wheels 12 and 41 up to 90 degrees left and right.
Therefore, only it moves laterally towards the front or / and rear side of the conveying laying device in situ lateral same direction, or the different directions, centering of concrete products A ₁ can easily and accurately perform.
In this way, the transport laying apparatus can be moved laterally, turned, etc. on the spot, so that even if the installation site is narrow, it is convenient to turn around.

<5> Installation Set When the centering of the concrete product A ₁ is completed, the intermediate support leg 25 is extended and landed on the road bed surface B between the two concrete products A ₁ and A ₂ as shown in FIG.
Next, the elevating part 50 is raised to move the front wheel 41 away from the road bed surface B.
By extending the left telescopic frame 22 raised wheel 41 to enter the front wheel 41 to the existing concrete article A _2.
The front wheel 41 is landed on existing concrete within the product A ₂ a lifting unit 50 drop operation to.

At this time, if the center of the concrete product A ₁ with respect to the existing concrete product A ₂ is shifted to the left or right, the rear wheel 12 and the front wheel 41 are driven as necessary to make fine adjustment of the centering.
At the same time, the cargo handling cylinder 23 is operated to adjust the height of the concrete product A ₁ .

Next, after the intermediate support leg 25 is contracted, the rear wheel 12 and the front wheel 41 are driven forward at low speed to join the right joint of the concrete product A _{1 to} the left joint of the existing concrete product A _2. To complete the installation.

<6> Backward traveling When the joining of the concrete product A ₁ is completed, the cargo handling cylinder 23 is contracted, the table 24 is separated from the ceiling surface of the concrete product A ₁ , and the rear wheel 12 and the front wheel 41 are driven backward.
As shown in FIG. 11, the front wheel 41 positioned on the bottom surface of the concrete product A ₁ is moved to the road floor surface B by performing an expansion / contraction operation of the intermediate support leg 25 and a lifting operation of the front wheel 41.
By repeating the above steps, the concrete products are sequentially transported and installed.

The conveying and laying device according to the present invention keeps the overall height of the climbing mechanism 30 low so as to correspond to the minimum size of the concrete product.
If the overall height of the climbing mechanism 30 can be reduced, it is possible to allow the climbing mechanism 30 to enter the concrete product without colliding with a concrete product having a small inner height as well as a concrete product having a large inner height. In comparison, it is possible to greatly increase the number of concrete products that can be transported by a single transport laying device.

A, A ₁ , A ₂ ··· Concrete product B ··· Roadbed surface 10 ··· Driving section 12 · · · Rear wheel 20 · · · Cargo handling portion 24 · ... Table 25 ... Intermediate support leg 30 ... Passing mechanism 40 ... Front wheel running part 41 ... Front wheel 50 ... Elevating part 51 ... ..Link 52 ... Elevating cylinder

Claims (4)

A driving and traveling unit having a pair of rear wheels, a main frame having a telescopic frame connected to a front part of the driving and traveling unit, a cargo handling unit having a vertically movable table mounted on the main frame, and a cargo handling unit A transport laying device that is provided so as to be movable up and down at the front end, has a climbing mechanism equipped with a front wheel, and is mounted on a table and transports a concrete product,
The main frame is connected to the front part of the driving traveling part so as not to rotate,
The pair of rear wheels and front wheels are self-propelled and steerable,
Transport laying device. In Claim 1, the said overpass mechanism is provided downward on the frame of the cargo handling part, and is provided with a telescopic intermediate support leg,
A front wheel traveling section having front wheels;
A lifting part that is interposed between the front end of the frame of the cargo handling part and the front wheel traveling part, and moves up and down the front wheel traveling part in response to expansion and contraction of the intermediate support leg,
A link mechanism in which the elevating part is pivotably connected between the front part of the telescopic frame and the rear part of the front wheel traveling part;
Characterized by comprising an elevating cylinder pivotably supported between the front part of the telescopic frame and the rear part of the front wheel traveling part,
Transport laying device.   3. The transport laying apparatus according to claim 1, wherein the pair of rear wheels and front wheels can be steered in a range of 90 degrees at the left and right.   4. A conveying and laying apparatus according to claim 1, wherein the concrete product is a concrete cylinder having both ends open.

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