JPH0442332Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a self-propelled concrete paving machine.

[Prior Art] Generally, reinforcing members framed in a lattice shape using reinforcing bars, for example, are buried in the roadbed, and the lower roadbed below the reinforcing members is filled with cement-based crushed stone, crushed stone, etc.
Paving materials with added sand etc. are used.

In addition, when the same pavement material as the lower base course is used for the upper base course above the reinforcing members, and in areas with heavy vehicle traffic, smaller cuts are made in the pavement material to ensure the hardness of the upper base base. Reinforcement materials such as steel fibers may be added. Alternatively, measures have been taken to shorten the construction time by accelerating the formation time by adding an accelerating agent into the paving material.

[Problems that the invention aims to solve] As mentioned above, countermeasures are taken for the roadbed layer, such as ensuring hardness and accelerating the formation time depending on the road conditions, but cement-based When adding reinforcing materials or quick-setting agents to paving materials, an agitation device is required, and a special vehicle equipped with an agitation device is required.

In addition, in order to ensure the hardness of the upper sub-base course relative to the sub-base sub-base course, a paving vehicle with paving materials for the upper sub-base course and one for the lower sub-base course is required since the paving materials are different for the upper sub-base course and the lower sub-base course. becomes. For this reason, a large number of vehicles must be maintained and managed, which is undesirable in terms of maintenance and management man-hours.

Therefore, the purpose of this invention is to provide a self-propelled concrete paving machine that has the versatility of being able to handle both upper and lower roadbeds using a single vehicle.

[Means for Solving the Problems] In order to achieve the above-mentioned object, in this invention, cement-based paving material is stored, and a drive unit controls the paving material dropping posture and the paving material receiving posture. It has a bucket that can be rotated at different times, and a conveying device that receives the paving material from inside the bucket in the paving material dumping position and sends it to the stirring device, and a first input port for dropping onto the pavement surface is provided at the starting end of the conveying device. A second input port is provided on the conveyance terminal side above the receiving port of the agitation device, and at least a shutter for opening and closing the first input port is provided.

[Function] In such a concrete paving machine, when the first input port of the conveying device is opened by the shutter,
The paving material in the bucket, which is delivered in the dropping position, is dropped onto the paving surface from the first input port. This results in a normal cement-based subgrade.

Next, a reinforcing member framed in a grid pattern by rebar is laid on top of the lower roadbed, and steel fibers are added on top of that to obtain the upper roadbed. The first inlet is then closed by the shutter. This causes the paving material sent from the bucket to pass through the first inlet and be dropped into the mixer from the second inlet at the end of the conveyance. At the same time, a worker adds steel fibers in a specified ratio from the receiving port of the mixer, and mixes them in the mixer. After that,
The upper roadbed is obtained by dropping the paving material to which steel fibers have been added from the mixing device. In this case, if the upper roadbed is the same as the paving material of the lower roadbed, the paving material in the bucket can be supplied by opening and closing the shutter to obtain an upper roadbed identical to the lower roadbed, and both operations can be performed with one vehicle.

[Embodiment] Hereinafter, an embodiment of this invention will be described in detail with reference to the drawings of FIGS. 1 to 3.

1 in the figure shows the body of a concrete paving machine 7 having a front wheel 3 and a rear wheel 5, and the rotational power of a hydraulic motor 9 is transmitted to the rear wheel 5 via a reduction gear 11, a differential case 13, and a transmission chain 15. Ru. The speed reducer 11 can be switched between high "H" and low "L" for the working speed and traveling speed, and can be switched to "H" or "L" as necessary.
"L" can be selected.

Also, inside the differential case 13 are left and right rear wheels 5, 5.
An actuating mechanism (not shown) is provided to allow differential movement of the .

On the other hand, a bucket 19 is attached to the front of the body 1 and is rotatable about a pivot shaft 17 between a paving material dropping position (dashed line in FIG. 1) and a paving material receiving position (solid line in the same figure).

The bucket 19 is formed into a box shape with an open top, and a rotating roller 21 is fixed to the upper edge of the bucket main body. A traction wire 29 fed out from a drum 27 of a winch 25 is wound around the rotating roller 21 via a guide roller 23, and the tip of the traction wire 29 extends upward from the body 1 to freely rotate the guide roller 23. The support arm 31 is connected to the support arm 31 supported by the support arm 31 .

Therefore, by the drum 27, the traction wire 2
By winding up the bucket 19 (arrow A in Figure 1)
It is possible to switch from the receiving position to the dropping position.

The conveyance start end 33a of the conveyance device 33 faces the lower part of the bucket 19 in the paving material dropping position. A first spreader 30a and a second spreader 30b on the left and right are provided at the transport start end 33a of the transport device 33 to send and collect the paving material sent from the bucket 19 to the central part, and the spreader shafts of the first and second spreaders 30a and 30b 28 is a hydraulic motor
Driven by M ₁ and M ₂ .

The transport case 35 of the transport device 33 is formed into a semi-cylindrical shape. Inside the conveyance case 35, a feed spiral 41 is provided on a rotating shaft 39 that is rotated by the power of a hydraulic motor 37 located on the side of the conveyance end portion 33b.

The feed spiral 41 functions to convey the paving material sent from the receiving port 43 along the conveyance case 35 toward the conveyance end portion 33b of the publication.

In addition to the receiving port 43 provided on the upper surface of the case 35, the transport case 35 of the transport device 33 includes:
A first input port 45 and a second input port 47 are provided, respectively. The first input port 45 is the conveyance starting end 33
a, and the second input port 47 is located on the side of the conveyance end portion 3.
3b side and the first and second input ports 45,
47 opens at the bottom of the transport case 35. The first input port 45 is provided with a shutter 49 that is opened and closed by a desired control means, and when the shutter 49 is "open", the paving material is dropped from the first input port 45 and transferred to the second input port 47. transport will not occur. Furthermore, when the shutter 49 is "closed", the paving material passes through the first input port 45 and can be transported toward the second input port 47, so the second input port 47 does not have a shutter. There is.

A receiving port 53 of the stirring device 51 faces below the second input port 47 .

The stirring device 51 has a plurality of stirring blades 59 spirally arranged on a rotary shaft 57 that can be rotated by a drive motor 55 to transport the mixture backward while agitating the mixture. A discharge port 63 is provided for dropping the material.

The conveyor 61 has an endless belt 67 wrapped around a driving pulley 63 and a driven pulley 65.
One end of the conveyor belt support frame 69 is pivotally supported by the machine body 1, and the other end is supported by the movable frame 71. The movable frame 71 is fixedly supported by a support arm 73 extending rearward from an arm shaft 73a serving as a mounting shaft, and under the control of a hydraulic device 75, the support frame 71 can move up and down about the arm shaft 73a as a fulcrum. ing.

The hydraulic system 75 consists of a cylinder 75a fixed to the body 1 and a piston rod 75b fixed to the support arm 73.
When the support frame 71 is expanded, the support frame 71 is raised, and when it is contracted, the support frame 71 is lowered.

The support frame 71 is provided with a spreader 83 in which a spiral plate 81 is attached to a rotating shaft 79 driven by a hydraulic motor 77. It's summery. In addition, the support frame 7 is provided at the rear of the spreader 83.
1 is provided with a ground leveling plate 85 that is long in the width direction of the vehicle.

An eccentric arm 91 of an eccentric shaft 89 rotatably supported by a bearing 87 is attached to the flange 85a of the leveling plate 85, and a swing arm 93 extending from the support frame 71 is pivotally supported on the eccentric arm 91. has been done. Therefore, due to the rotation of the eccentric shaft 89,
The ground leveling plate 85 can move up and down corresponding to the amount of eccentricity of the eccentric shaft 89. Note that power is transmitted to the eccentric shaft 89 from the hydraulic motor 77 via a transmission mechanism 95 provided inside the support frame 71.

A conveyance start end 97a of a separately prepared belt conveyor 97 faces the conveyance end side of the conveyor 61, and this belt conveyor 97 is of a movable type that can be carried by a truck or the like. This makes it possible to transport the paving material to the rear of the machine body 1.

Note that 99 indicates handles for fine adjustment provided on both sides of the support frame 71.

In the concrete paving machine constructed in this way, first, the first input port 45 of the conveying device 33 is opened by the shutter 49 in order to carry out concrete paving. As a result, the paving material sent out from the bucket 19 in the paving material dropping position is dropped onto the paved surface from the first input port 45 to a predetermined thickness. The dropped paving material is sent to the rear spretsuda 83.
After being spread out left and right by the ground leveling plate 85, the uneven portions are leveled almost completely by leveling plates 85 to form a lower roadbed.

Next, a reinforcing member framed in a lattice shape using reinforcing bars is placed on the lower roadbed, and then paving material is dropped onto the reinforcing member to form an upper roadbed.

At this time, for example, when reinforcing the upper roadbed by adding a reinforcing material such as cut steel fiber into small pieces, the first input port 4 is
Block 5. Thereby, after passing through the first input port 45, the paving material is fed into the stirring device 51 from the second input port 47. At this time, the operator feeds the steel fibers at a prescribed rate through the receiving port 53. In this case, the steel fibers are packed in bags and set in the machine body 1 in advance, so that it can be handled accordingly. Next, the steel fibers are stirred in the stirring device 51 and then dropped onto the lower roadbed from the discharge port 63 via the conveyor 61 and the belt conveyor 97. In this case, a single vehicle will be able to handle both cement-based pavement materials and pavement materials with reinforcement added.

Thereafter, by controlling the opening and closing of the shutter 49, it is possible to use the same pavement material for the lower roadbed and the upper roadbed, or to obtain a pavement material in which reinforcing material is added to the upper roadbed.

[Effects of the invention] As explained above, according to the concrete paving machine of this invention, there are cases in which concrete is dropped via the stirring device by opening and closing the shutter, and cases in which concrete is dropped directly from the conveying device without going through the stirring device. As a result, various combinations of paving materials can be obtained using a single vehicle. Therefore, maintenance and management of the vehicle becomes easier.

[Brief explanation of the drawing]

Fig. 1 is a side view of the concrete paving machine of this invention, Fig. 2 is a plan view of the same, and Fig. 3 is a rear view showing a part of the ground leveling plate. Explanation of main drawing symbols, 19... Bucket, 2
5... winch (drive unit), 33... conveyance device,
45...First input port, 47...Second input port, 49
... Shatter, 51 ... Stirring device.

Claims (1)

[Scope of utility model registration request] A bucket that stores cement-based paving material and can be rotated by a drive unit between a paving material dropping position and a paving material receiving position, and receives the paving material from within the bucket in the paving material dropping position and sends it to an agitation device. a conveyance device, and a first input port for discharging onto a paved surface is provided on the conveyance start end side of the conveyance device,
A second input port is provided above the receiving port of the stirring device on the conveyance terminal side, and at least the first input port is provided with:
A self-propelled concrete paving machine characterized by being provided with a shutter for opening and closing the input port.