JP3041312U - Road surface cutting device - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To change the rotation direction of a cutter blade with a simple configuration. A road surface cutting device includes an engine and a cutter blade. On the engine drive shaft 20,
The driving pulley 22 is fixed. The cutter blade is supported by a shaft 24, and a moving pulley 26 is fixedly provided at one end thereof. The power transmission mechanism for transmitting the rotational force of the engine includes the forward and reverse rotation belts 50, 52.
And intermediate pulleys 54 and 56 and a tension pulley 58. The intermediate pulleys 54 and 56 are driven pulleys 26.
It is arranged on both sides of the center. The forward rotation belt 50 is composed of a timing belt having teeth on its inner surface side, and is wound directly between the driving pulley 22 and the driven pulley 26 when the blade is rotated in the forward direction.
The reverse rotation belt 52 is composed of a timing belt having teeth inside and outside, and is wound inside the driven pulley 26 from the driving pulley 22 to the intermediate pulley 54 and then to the outside of the intermediate pulley 56. And is wound on the outside of the driving pulley 22.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a road surface cutting device, and more particularly to a technique for changing a rotation direction of a cutter blade of the cutting device.

[0002]

[Prior art]

 When repairing concrete or asphalt paved roads or installing or repairing buried objects such as gas pipes and electric power cable pipes under the road surface, the existing road surface is cut first. A road surface cutting device is known as a device used for this type of cutting.

A road surface cutting device generally includes an engine placed on a trolley, and a cutter blade protruding downward from the trolley so as to be able to move up and down and rotating in association with the engine. The cutter blade is moved while moving the trolley. By lowering and rotating the cutter blade while pressing it against the road surface, the blade is continuously cut to a predetermined depth from the road surface along the moving direction of the truck.

In this case, the cutter blade is generally rotated in a direction called an undercut in which the cutter blade is rotated from the upper side to the lower side in order to make the cutter blade act on the cutter blade to increase the cutting efficiency. It was

However, when the cutter blade is rotated in such a direction, there is a problem that the sludge jumping up due to cutting is directed backward, which makes it difficult to operate the cutting device. Japanese Patent Laid-Open No. 6-11364 proposes a method called an upper cut in which a cutter blade is rotated upward from a lower side.

From the side of the user of the road surface cutting device, it is desirable that the rotating direction of the cutter blade can be arbitrarily selected. As a means for changing the rotation direction of the cutter blade rotationally driven by the engine, for example, a transmission or a gear may be interposed between the engine and the cutter blade.

However, such a rotation direction conversion means has the technical problems described below.

[0008]

[Problems to be solved by the device]

 That is, a belt system is usually adopted for the power transmission mechanism between the engine and the cutter blade of this type of road surface cutting device, and for example, the transmission and gear of the existing road surface cutting machine as described above are used. There is a problem in that when the conversion means is attached, not only the structure becomes complicated but also a large amount of remodeling is inevitable and the remodeling cost is considerably high.

The present invention has been made in view of the above problems, and a road surface capable of changing the rotation direction of a cutter blade with a relatively simple structure without major modification. It is to provide a cutting device.

[0010]

[Means for Solving the Problems]

 To achieve the above object, the present invention provides a road surface cutting device including an engine mounted on a carriage and a cutter blade that is rotatably supported by the carriage and is rotatably driven by the engine to cut the road surface. In the device, the rotation direction of the engine is always driven to rotate in a fixed direction, and the normal rotation is wound between a driving pulley provided on the output shaft of the engine and a driven pulley provided on the cutter blade. And a pair of intermediate pulleys arranged on both sides of the driven pulley, and a reverse rotation belt wound so that the winding direction around the drive pulley is different from that of the forward rotation belt. It was According to the road surface cutting device configured as described above, the rotation direction of the cutter blade can be changed by switching the forward or reverse rotation belt. The forward rotation belt is composed of a timing belt having teeth extending on one surface in a direction orthogonal to the traveling direction, and the reverse rotation belt is formed on both surfaces in a direction orthogonal to the traveling direction. The timing belt may have extending teeth, and the drive, driven, and intermediate pulleys may be provided with concave grooves that fit into the tooth portions. With this configuration, the rotational force can be transmitted to the cutter blade without causing slip. A tension pulley for adjusting the tension of each of the belts may be provided in the middle of winding the forward and reverse rotation belts. With this configuration, the tension of the belt can be properly maintained by the tension pulley. The tension pulley may be installed on the inner side of the winding path of the normal and reverse rotation belts, and may adjust the tension for both the normal and reverse rotation belts. According to this structure, only one tension pulley for tension adjustment is required.

[0011]

[Embodiment of the invention]

 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 to 6 show an embodiment of a road surface cutting device according to the present invention. The road surface cutting device shown in the figure includes an engine 10, a cutter blade 12, and a cooling device 14. Each of these devices is mounted on a movable carriage 18 equipped with wheels 16.

The engine 10 is driven by, for example, gasoline, heavy oil, etc., and a driving pulley 20 is fixedly mounted on a driving shaft 20 projecting to one end side thereof. The cutter blade 12 is, for example, formed into a disk shape by holding a diamond grain grind, and is supported by a blade shaft 24 provided at the center thereof.

In this embodiment, the blade shaft 24 is arranged on one end side in the longitudinal direction of the carriage 18 so as to be orthogonal to the longitudinal direction, and is rotatably supported by the carriage 18 by a bearing or the like (not shown). .

A sliding pulley 26 is fixed to one end of the blade shaft 24. The cooling device 14 is composed of an air cooling device 30 and a water cooling device 32. The air-cooling device 30 is provided so as to project from the engine 10 on the side opposite to the driving shaft 20, and is rotated by the engine 10. A cooling fan 34, a radiator 36 that is installed in front of the cooling fan 34 and face each other, 10 and a water pump 38 attached thereto.

The water pump 38 and the radiator 36 of the air cooling device 30 are connected via a first communication hose 40, the radiator 36 and the water cooling device 32 are connected via a second communication hose 42, and a water cooling device is connected. 32 and the engine 10 are connected via a third communication hose 44, and the engine cooling water A that connects the engine 10 and the air-cooling and water-cooling devices 30, 32 by the communication hoses 40, 42, 44. The water cooling device 32 is installed on the upstream side of the radiator 36 in this circulation path.

The water cooling device 32 is connected to one end of a supply hose 48 for the blade cooling water B, one end of which is connected to a water tank 46, and the water cooling device 32 and a blade cover 50 covering the outer circumference of the blade 12. In between, a water supply hose 52 for supplying the blade cooling water B is installed.

The power transmission mechanism that transmits the rotational force of the engine 10 to the driven pulley 26 side is composed of forward and reverse rotation belts 50 and 52, a pair of first and second intermediate pulleys 54 and 56, and a tension pulley 58. Has been done.

The pulleys 54, 56 and 58 including the driving and driven pulleys 22 and 26 are arranged on the same plane on one side surface of the carriage 18 as shown in the arrangement state of FIGS. And is covered with a cover (not shown).

The first and second intermediate pulleys 54, 56 are rotatably arranged on one side of the bogie 18, and are arranged on both sides of the driven pulley 26 so as to sandwich the intermediate pulley 26. There is.

The forward rotation belt 50 is composed of a timing belt provided with teeth extending in a direction orthogonal to the running direction on the inner surface side, and as shown in the winding state of FIG. 22 and the driven pulley 26 and the outside are directly wound.

The reverse rotation belt 52 is composed of a timing belt provided with teeth extending in the direction orthogonal to the running direction on the inner and outer surfaces, respectively, and its winding state is shown in FIG. As described above, after being wound from the driving pulley 22 to the inner side of the driven pulley 26 via the first intermediate pulley 54, it is wound to the outer side of the driving pulley 22 via the outer side of the second intermediate pulley 56.

Each of the pulleys 54, 56, 58, including the driving and driven pulleys 22, 26, is provided with a groove corresponding to the teeth of the timing belt. On the other hand, the tension pulley 58 is for adjusting the tension of the forward and reverse rotation belts 50 and 52, and is arranged inside the winding path of the belts 50 and 52.

An example of the tension pulley 58 is shown in FIGS. 4 to 6. The tension pulley 58 shown in the figure includes an idler pulley 60, an arm 62 that rotatably supports the idler pulley 60, a square inner cylinder 64 in which one end of the arm 62 is fixed, and a square inner cylinder. And a rectangular outer cylinder 66 that accommodates 64.

As shown in FIG. 6, the rectangular inner cylinder 64 and the outer cylinder 66 are arranged in a state of being displaced by 45 degrees in the circumferential direction, and four rubber rods 68 are provided at each corner of the rectangular outer cylinder 66. Each is inserted.

The rectangular outer cylinder 66 is fixed to a mounting plate 70, and the mounting plate 70 is fixed to a plate 72 provided on the dolly 18 side by mounting bolts 74. According to the tension pulley 58 configured as described above, when the rectangular inner cylinder 64 rotates in the direction shown by the arrow in FIG. 6, the rubber rod 68 is pinched between the rectangular inner cylinder 64 and the rectangular outer cylinder 66, The elastic force of the rubber acts to restore it to its original state.

In the tension pulley 58 of this embodiment, the elastic force of the rubber rod 68 is used to adjust the tension of the forward and reverse rotation belts 50 and 52. In this case, the tension pulley 58 is fixed at a fixed position by loosening the mounting bolt 74 and then re-fixing the belt 50, 52 (see FIGS. 2 and 3).

Now, in the road surface cutting device configured as described above, the rotation direction of the engine 10 is always kept constant. When changing the rotation direction of the cutter blade 12, the rotation direction is changed by changing over the forward and reverse rotation belts 50 and 52.

That is, assuming that the forward rotation belt 50 is directly wound between the driving and driven pulleys 22 and 26 to rotate the cutter blade 12 forward as shown in FIG. As shown in FIG. 3, the driven pulley 26 is wound from the opposite direction via the intermediate pulleys 54 and 56, whereby the rotational direction of the cutter blade 12 is changed.

According to such a rotation direction changing means, it suffices to install the intermediate pulleys 54 and 56 and prepare and place the reverse rotation belt 52. Therefore, even for an existing road surface cutting machine, It can be easily applied without major modification.

Further, in this embodiment, the forward rotation belt 50 is composed of a timing belt having teeth extending in the direction orthogonal to the traveling direction on one surface, and the reverse rotation belt 52 is provided on both surfaces. It is composed of a timing belt that has teeth extending in the direction orthogonal to the running direction. Since the drive and driven gears 22 and 26 and the intermediate pulleys 54 and 56 are provided with recessed grooves that fit with the teeth, they rotate without slipping. The force can be transmitted to the cutter blade 12.

Further, since the tension pulley 58 for adjusting the tension of each of the belts 50 and 52 is provided in the middle of winding the forward and reverse rotation belts 50 and 52, the tension of the belts 50 and 52 is properly adjusted by the tension pulley. Can be kept at

Further, the tension pulley 58 is installed inside the winding path of the forward and reverse rotation belts 50 and 52, and adjusts the tension of both the forward and reverse rotation belts 50 and 52. Only one tension pulley 58 for adjustment is required.

[0033]

[Effect of the invention]

 As described in detail above, according to the road surface cutting device according to the present invention, the rotation direction of the cutter blade can be changed with a relatively simple structure without major modification.

[Brief description of the drawings]

FIG. 1 is a top view of a road surface cutting device according to the present invention.

FIG. 2 is a side view of a power transmission mechanism when the cutter blade of the road surface cutting device of FIG. 1 is normally rotated.

FIG. 3 is a side view of a power transmission mechanism when the cutter blade of the road surface cutting device of FIG. 1 is reversely rotated.

4 is a front view of a tension pulley of the road surface cutting device of FIG. 1. FIG.

FIG. 5 is a side view of the tension pulley of the road surface cutting device of FIG. 1 in a mounted state.

6 is a cross-sectional view of a main portion of a tension pulley of the road surface cutting device of FIG.

[Explanation of symbols]

 10 Engine 12 Cutter Blade 22 Driving Pulley 24 Blade Shaft 26 Driven Pulley 50 Forward Rotation Belt 52 Reverse Rotation Belt 54 First Intermediate Pulley 56 Second Intermediate Pulley 58 Tension Pulley

Claims (4)

[Utility model registration claims] 1. A road surface cutting device comprising an engine mounted on a bogie and a cutter blade rotatably supported by the bogie and rotationally driven by the engine to cut the road surface. A belt for normal rotation wound between a driving pulley provided on the output shaft of the engine and a driven pulley provided on the cutter blade, and the driven belt. A road surface cutting device, in which a pair of intermediate pulleys are arranged on both sides of the pulley, and a reverse rotation belt wound so that the winding direction around the driving pulley is different from the forward rotation belt is provided. . 2. The forward rotation belt is composed of a timing belt having teeth extending in a direction orthogonal to the traveling direction on one surface, and the reverse rotation belt is orthogonal to the traveling direction on both surfaces. 2. The road surface cutting device according to claim 1, comprising a timing belt having teeth extending in a direction, and the driving, driven, and intermediate pulleys having concave grooves fitted to the teeth. 3. The road surface cutting device according to claim 2, wherein a tension pulley for adjusting the tension of each belt is provided in the middle of winding the forward and reverse rotation belts. 4. The tension pulley is installed inside a winding path of the forward and reverse rotation belts, and adjusts tensions of both the forward and reverse rotation belts. The road surface cutting device according to claim 3.