JPH0774490B2 - Road cutting machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a road surface cutting machine for cutting the surface of a pavement road surface, and more particularly to a small self-propelled road surface cutting machine.

[0002]

2. Description of the Related Art When rubbing or cracking occurs on the surface of asphalt, concrete paved roads, etc., the paved surface is cut to a predetermined depth and repaved for repair. Therefore, various cutting machines for cutting the pavement surface have been developed, and this cutting machine generally performs a cutting operation by rotating a cutting rotor provided on a vehicle body. And since a large cutting machine only needs to cut the central part of the road surface without obstacles linearly, it does not matter so much, but for a small cutting machine, the manhole left uncut by the large cutting machine. You must cut around and around the curb. Therefore, the small-sized cutting machine performs the cutting work in a curved manner, which causes various problems that the large-sized cutting machine does not have.

[0003]

For example, when cutting along the outer shape of a manhole or the like, high turning ability is required. Further, in the case of a small cutting machine, the vehicle weight is light, and the vehicle body is lifted by the reaction force received from the road surface at the time of cutting, so that sufficient cutting cannot be performed. On the other hand, when the vehicle weight is increased, not only the running performance such as acceleration and braking performance deteriorates, but also
In particular, when the cutting rotor is provided on the side of the vehicle body, the left-right weight balance is lost and the straight running stability is impaired. The present invention has been proposed in view of the above, and an object thereof is to provide a small road surface cutting machine having excellent cutting performance and having high turning ability and stable straightness.

[0004]

In order to achieve the above-mentioned object, the present invention is a self-propelled road surface cutting machine equipped with traveling means, wherein front, rear, left and right wheels are provided so as to be steerable via suspension wheel steering means. And located between the front and rear wheels on one side of the vehicle body,
A cutting means slidably provided in a direction substantially orthogonal to the traveling direction through the slide means, and a weight means for increasing the load on the cutting means side are provided on one side where the cutting means is provided. The cutting means is slid along a reference and the cutting means is pulled into the vehicle body during traveling to balance the left and right weights.

[0005]

The road surface is cut by the cutting means that is slidable in a direction substantially orthogonal to the traveling direction, and the cutting can be performed along the reference while sliding the cutting means.
Further, during cutting, the weight means added to the cutting means side cancels the reaction force from the road surface, and during running, the cutting means is pulled into the vehicle body to achieve a left-right weight balance.

[0006]

1 is a schematic side view of a road surface cutting machine 1 according to the present invention, FIG. 2 is a schematic front view, and FIG. 3 is a schematic rear view. The cutting machine 1 is a self-propelled construction machine having traveling means, and is capable of traveling according to a driver's operation by a driving operation means.

The vehicle body 2 includes a frame 3, and the vehicle body 2 is provided with steerable front, rear, left and right wheels via a drive source and suspension wheel manipulating means. A cutting means 4 described later is provided on one side of the vehicle body 2. A so-called four-wheel steering system capable of steering each wheel is desirable in order to improve the turning ability. Further, it is preferable that the height of the wheels is not adjustable so that the unevenness of the work site is absorbed and the vehicle body 2 is raised during traveling so as not to hit the obstacle.

The cutting means 4 rotates a drum 6 provided with a plurality of bits 5 for cutting. As shown in FIGS. 4 and 5, the cutting means 4 is configured to be slidable on the frame 3 through a slide means 7 in a direction substantially orthogonal to the traveling direction.

That is, the drum 6 and the bracket 9 provided with the hydraulic motor 8 for rotating the drum 6 are
It is slidably mounted on a pair of slide shafts 10 arranged in a direction substantially orthogonal to the traveling direction. Further, the bracket 9 is provided with a slide control means 11 to control the position of the bracket 9. In the illustrated embodiment, the slide control means 11 is configured to screw a screw shaft 13 into a screw bearing 12 provided on a bracket 9 and rotate the screw shaft 13 with a slide motor 14, for example. However, it may be configured by a hydraulic cylinder or the like.

On the side where the cutting means 4 is provided, a weight means 15 is provided in order to increase the load on the cutting means 4 side and counter the reaction force that the drum 6 receives from the road surface during cutting. The weight means 15 is formed, for example, by forming a weight storage portion 16 in the vehicle body 2 and storing a heavy object such as an iron plate in the storage portion.

Since the weight means 15 increases the load on the cutting means 4 side, the reaction force received by the cutting means 4 at the time of cutting can be canceled and a sufficient weight can be applied to the cutting means 4. Therefore, the cutting means 4 can surely cut the road surface without floating from the road surface, and deep cutting can be performed by one cutting operation, so that the working efficiency is remarkably improved.

On the other hand, when traveling, the weight means 15 is used.
As a result, the weight balance of the vehicle body 2 is lost, and the stability is poor as it is. Therefore, in the road surface cutting machine 1 according to the present invention, the cutting means 4 is moved to the right from the center of the vehicle body 2 so that the left and right weight balance is substantially balanced. In this way, if the weight is balanced, stable running becomes possible.

Next, as an example of the cutting work by the road surface cutting machine 1 according to the present invention, the cutting work around the manhole 17 will be briefly described. First, the cutting means 4 provided in the road surface cutting machine 1 of the present invention is moved to an appropriate position. Then, the vehicle body 2 is turned along the peripheral edge of the manhole 17 in a substantially circular shape. At this time, the worker controls the slide control means 11 while visually observing the cutting means 4 to cut the cutting means 4.
When the cutting means 4 protrudes from the vehicle body 2 when the cutting means 4 breaks away from the edge of the manhole 17, the cutting means 4 pulls into the vehicle body 2 when the cutting means 4 bites into the edge of the manhole 17, Always turn along the edge of the manhole 17. At this time, it is advisable to control the cutting means 4 by standing on the road surface and operating the remote control so that the operator can easily see it.

According to the road surface cutting machine 1 of the present invention which operates as described above, the cutting means 4 can be installed in the manhole 1 even if the running locus of the vehicle body 2 does not draw a perfect circle concentric with the manhole 17.
Since it can be always matched with the edge of 7, the uncut portion does not occur unlike the conventional cutting means 4. Therefore, it is not necessary to hang the uncut portion 18 with an air hammer or the like, and it is possible to significantly reduce labor and time.

Further, since the weight on the side of the cutting means 4 is increased by the weight means 15, the drum 6 is not lifted up by the reaction force received at the time of cutting, and sufficient weight can be applied to perform a satisfactory cutting work. . On the other hand, at the time of traveling, since the drum 6 is pulled into the vehicle body 2 to balance the left and right weights, stable traveling is possible.

Here, considering the left-right weight balance during cutting and during traveling based on FIG. 7, the following Table 1 is obtained. Note that P is the weight of the vehicle body, W is the weight added to the weight portion, Q is the weight of the cutting means, and T is the cutting reaction force received by the left wheel during cutting.

[0017]

[Table 1]

On the other hand, for comparison, in the case of the conventional cutting machine not equipped with the sliding means shown in FIG. However, the body weight M is the total of P + W + Q described above.

[0019]

[Table 2]

When the weight of the left wheel during cutting is compared between the cutting machine according to the present invention and the conventional cutting machine, R
It is understood that l is larger than Rl ″ and the cutting device has sufficient cutting ability without floating. Also, the weight applied to the left and right wheels during self-propelling, Rl ′ and Rr ′ are almost equal, and the left and right balance is equal. You can see that

To give an example of concrete numerical values, P = 38
00kg, W = 500kg, Q = 700kg, T = 20
00kg, L1 = 1200mm, L2 = 1300m
When m, L3 = 1450 mm and L4 = 300 mm, Rl = 740 kg, Rr according to the above Tables 1 and 2.
= 2260kg, Rl '= 2575kg, Rr' = 24
25 kg, Rl ″ = 80 kg, and Rr ″ = 2900 kg. Therefore, according to the cutting machine of the present invention, the load applied to the left wheel during cutting is larger than that of the conventional cutting machine (Rl> Rl ″), and the load applied to the left and right wheels during traveling is almost equal ( It can be confirmed that Rl′≈Rr ′).

Although the present invention has been described above with reference to the embodiments shown in the drawings, the present invention is not limited to the above-mentioned embodiments and can be appropriately implemented without changing the configuration described in the claims. For example, the sliding means may have any structure such as a screw shaft or a hydraulic cylinder, and the weight object to be stored in the weight means may be something other than an iron plate. In the illustrated embodiment, the cutting means and the like are provided on the left side of the vehicle body, but the cutting means and the like may be provided on the right side of the vehicle body.

[0023]

In summary, the present invention is a self-propelled road surface cutting machine equipped with a traveling means, which includes front, rear, left and right wheels steerably provided via suspension wheel manipulating means and front and rear wheels on one side of a vehicle body. Cutting means provided between the wheels of the cutting means so as to be slidable in a direction substantially orthogonal to the traveling direction through the sliding means, and a weight for increasing the load on the cutting means side on one side provided with the cutting means. Means for sliding the cutting means along the reference when cutting the road surface, and pulling the cutting means into the vehicle body during traveling to balance the left and right weights. Therefore, the weight means provided on the cutting means side As a result, the reaction force received from the road surface during cutting can be canceled, and the cutting means will not rise. Therefore, according to the present invention, since sufficient weight can be applied to the cutting means, deep cutting is possible. Moreover, since the cutting means can slide in a direction substantially orthogonal to the traveling direction, it is possible to adjust the cutting work along the edges of manholes, curbs, etc. while visually observing the cutting state. Is extremely high. On the other hand, at the time of traveling, the cutting means can be retracted into the vehicle body to balance the left and right weights and the vehicle can travel stably.

[Brief description of drawings]

FIG. 1 is a schematic side view of a road surface cutting machine according to the present invention.

FIG. 2 is a schematic front view of a road surface cutting machine according to the present invention.

FIG. 3 is a schematic rear view of the road surface cutting machine according to the present invention.

FIG. 4 is a plan view of a slide unit according to the present invention.

FIG. 5 is a cross-sectional view of essential parts showing a cutting means and a sliding means in the present invention.

FIG. 6 is a plan view illustrating a turning locus of a vehicle body and a cutting locus of a cutting unit.

FIG. 7 is a schematic diagram for explaining weight balance,
(A) shows the time of cutting, (B) shows the time of running.

FIG. 8 is a schematic diagram for explaining a weight balance during cutting in a conventional cutting machine.

[Explanation of symbols]

 1 Road surface cutting machine 2 Car body 4 Cutting means 7 Sliding means 15 Weight means

Claims (1)

[Claims] 1. A self-propelled road surface cutting machine having traveling means, wherein the front and rear wheels are steerably provided via suspension wheel manipulating means, and are located between the front and rear wheels on one side of the vehicle body. The cutting means is provided so as to be slidable in a direction substantially orthogonal to the traveling direction through the sliding means, and the weight means for increasing the load on the cutting means side is provided on one side where the cutting means is provided. A road surface cutting machine characterized in that the cutting means is slid along a reference line during cutting, and the cutting means is pulled into a vehicle body during traveling to achieve a left-right weight balance.