Road cutter

Abstract

To provide a road cutter that can automatically measure a cut distance.SOLUTION: A road cutter 1 comprises a detection device 3 for detecting the rotation of a traveling drive system 2, and a calculation and display device for calculating the cut distance of a paved road surface cut by the road cutter 1 based on a detection signal from the detection device 3 and displaying the calculated cut distance.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a road surface cutter for cutting paved roads.

Background Art

[0002] Paved roads made of asphalt or concrete are damaged or cracked due to the traffic load of vehicles and aging deterioration, so repair work is required to cut and remove the paved road surface and repave it newly. And, in order to cut and remove the existing paved road surface, a road surface cutter equipped with a blade with diamond chips is used (see, for example, Patent Documents 1 and 2).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in the work of cutting and removing the paved road surface, after cutting the paved road surface with a road surface cutter, the cutting distance is measured in order to accumulate the construction cost (cutting work unit price × cutting distance) or calculate the consumption amount of the blade (consumption rate × cutting distance). And, since this measurement of the cutting distance is performed by an operator using a distance measuring instrument such as a walking measure or a tape measure after the work is done, it has been troublesome and time-consuming.

[0005] In view of the problems involved in the measurement work of the cutting distance in the above-mentioned work of cutting and removing the paved road surface, an object of the present invention is to provide a road surface cutter capable of automatically measuring the cutting distance.

Means for Solving the Problem

[0006] In order to achieve the above object, a road surface cutter of the present invention is a road surface cutter configured to cut a paved road surface while self-running in a cutting posture, and includes a detection device for detecting the rotation of a traveling drive system, and an arithmetic display device for calculating and displaying the cutting distance of the paved road surface cut by the road surface cutter based on a detection signal of the detection device.

[0007] In this case, the arithmetic display device can calculate the cutting distance of the paved road surface cut by the road surface cutter based on the detection signal emitted by the detection device when the road surface cutter is in a cutting posture and in a self-running mode.

[0008] Also, the detection device can be configured to detect the rotation of a brake drum.

Advantages of the Invention

[0009] According to the road surface cutter of the present invention, by means of a detection device for detecting the rotation of a traveling drive system and an arithmetic display device for calculating and displaying the cutting distance of the paved road surface cut by the road surface cutter based on a detection signal of the detection device, which are provided in a road surface cutter configured to cut a paved road surface while self-running in a cutting posture, it is possible to automatically measure the cutting distance in a cutting and removal work of a paved road surface.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Modes for Carrying Out the Invention

[0011] Hereinafter, embodiments of the road surface cutter of the present invention will be described with reference to the drawings.

[0012] Figs. 1 to 3 show an embodiment of the road surface cutter of the present invention. This road surface cutter 1 is similar to a general-purpose road surface cutter disclosed in Patent Documents 1 and 2, and is configured to cut a paved road surface while self-running in a cutting posture. It is provided with a detection device 3 for detecting the rotation of the traveling drive system 2, and an arithmetic display device (not shown) that calculates and displays the cutting distance of the paved road surface cut by the road surface cutter based on the detection signal of the detection device 3.

[0013] The location of the traveling drive system 2 where the rotation is detected by the detection device 3 can be any location of the traveling drive system 2. In this embodiment, the detection device 3 is used to detect the rotation of the brake drum 6 that is interlocked with the hydrostatic continuously variable transmission 5 that rotationally drives the rear wheel 4, which is a driving wheel, via a gear. As a result, since there are few detection errors due to slipping or the like, the cutting distance can be accurately calculated, and the detection device 3 can be easily attached. In addition to new ones, the detection device 3 can also be retrofitted to existing road surface cutters 1.

[0014] For the detection device 3, a general-purpose detection device such as an electromagnetic type or an optical type can be selected according to the traveling drive system 2 that detects rotation. In this embodiment, an electromagnetic rotary detector (a sensor that approaches the tooth tips of the detection gear attached to the rotary shaft and extracts a frequency signal proportional to the rotational speed. For example, an electromagnetic rotary detector manufactured by Ono Sokki Co., Ltd.) is used. Here, when detecting the rotation of the brake drum 6 by the electromagnetic rotary detector, in addition to detecting the rotation of the gear provided on the outer periphery of the brake drum 6, another detection gear can be attached to the rotary shaft of the brake drum 6 and the rotation of this detection gear can be detected. As a result, even in the road surface cutter 1 used in a harsh environment where vibration is applied or dust is generated, the detection device 3 can stably detect the rotation of the traveling drive system 2.

[0015] The arithmetic display device is configured such that when the road surface cutter 1 is in the cutting posture shown in Fig. 3(b) and in the self-propelled mode, the cutting distance of the paved road surface cut by the road surface cutter 1 is calculated based on the detection signal emitted by the detection device 3. Here, the road surface cutter 1 can be switched between the cutting posture shown in Fig. 3(a) and the moving posture shown in Fig. 3(b) by operating the machine posture switching lever 71, causing the hydraulic cylinder to expand and contract to swing the arm of the support wheel 8 that supports the machine body. Also, by operating the traveling mode switching lever 72, the traveling mode of the road surface cutter 1 can be switched between the self-propelled mode and the feeding mode. By the way, in this type of road surface cutter 1, the self-propelled mode is generally used only when cutting the paved road surface while self-propelling in the cutting posture. Therefore, by measuring the detection signal emitted by the detection device 3 when the traveling mode switching lever 72 is in the self-propelled mode position, the cutting distance of the paved road surface cut by the road surface cutter 1 can be calculated. The measurement control of the detection signal emitted by the detection device 3 can be performed by detecting the position of the lever using a detector such as a limit switch or using an electrical signal of the drive control system, corresponding to the drive control mechanism of the road surface cutter 1, as in this embodiment. As a result, the cutting distance of the paved road surface cut by the road surface cutter 1 can be calculated automatically without the need for laborious and time-consuming processes by the operator.

[0016] In this embodiment, the detection signal emitted by the detection device 3 is measured when the traveling mode switching lever 72 is in the self-propelled mode position. However, in the measurement control of the detection signal emitted by this detection device 3, according to the specifications and usage form of the road surface cutter 1, the condition for measuring the detection signal emitted by the detection device 3 can be limited to the mechanical posture of the road surface cutter 1 being in the cutting posture, detected using a detector such as a limit switch, and this detection signal can be added as an AND condition. Further, when the road surface cutter 1 is manually driven, a switch 74 of an electromagnetic clutch 73 that turns on and off the rotational force input from the drive source to the input shaft of the hydrostatic continuously variable transmission 5 is added as an AND condition to the condition for measuring the detection signal emitted by the detection device 3 so that the detection signal emitted by the detection device 3 is not measured.

[0017] According to the road surface cutter 1 of the present invention, a detection device 3 that detects the rotation of a traveling drive system 2 provided in the road surface cutter 1 configured to cut a paved road surface while self-running in a cutting posture, and a paved road surface cut by the road surface cutter based on the detection signal of the detection device 3. The cutting distance can be automatically measured by the arithmetic display device that calculates and displays the cutting distance.

[0018] As described above, the road surface cutter of the present invention has been described based on its embodiments. However, the present invention is not limited to the configurations described in the above embodiments, and the configuration can be appropriately changed without departing from the gist thereof.

Industrial Applicability

[0019] Since the road surface cutter of the present invention can automatically measure the cutting distance, it can be widely used for road surface cutters used in cutting and removing work on paved road surfaces.

Explanation of Reference Numerals

[0020] 1 Road surface cutter 2 Traveling drive system 3 Detection device 4 Rear wheel (drive wheel) 5 Hydrostatic continuously variable transmission 6 Brake drum 71 Machine posture switching lever 72 Travel mode switching lever 73 Electromagnetic clutch 74 Switch 75 Pulley 8 Support wheel

Claims

1. A road surface cutter configured to cut a paved road surface while self-propelling in a cutting posture, comprising: a detection device that detects the rotation of a traveling drive system; and an arithmetic display device that calculates and displays the cutting distance of the paved road surface cut by the road surface cutter based on a detection signal from the detection device.

2. The road surface cutter according to claim 1, wherein the arithmetic display device calculates the cutting distance of the paved road surface cut by the road surface cutter based on a detection signal emitted by the detection device when the road surface cutter is in a cutting posture and in a self-propelling mode.

3. The road surface cutter according to claim 1 or 2, wherein the detection device is configured to detect the rotation of a brake drum.

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