JPS63808Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a soundproof cover for a road surface circular cutter that cuts a road surface into a circle when repairing the road surface.

As is well known, a road surface circular cutter as shown in FIG. 1 is used to cut the road surface around road-occupied objects such as manholes into a circular shape when repairing the road surface. The road surface circular cutter has a shaft 3 whose upper end is rotatably fixed by a fulcrum pin 2 to the tip of a heavy equipment arm 1 which is moved up and down by a drive device (not shown), and an arm attached above the shaft 3. A hydraulic cylinder 6 is rotatably fixed by the mounting arm 4 and pin 5, and is fixed by the piston rod 7 and pin 8 of the hydraulic cylinder 6, and the shaft 3 is fixed by the vertical movement of the piston rod 7. a casing 9 that moves up and down guided by
Hydraulic motor 1 fixed above the casing 9
A sleeve 13 is fixed to a driven gear 12 that meshes with a manual gear 11 rotated by 0, and is rotatably fitted onto the shaft 3, a bit mounting base 14 fixed to the sleeve 13, and the bit mounting base. It consists of a cylindrical bit 15 fixed to 14 with a bolt or the like.

When using the road surface circular cutter having the above configuration, the lower end of the shaft 3 is placed above the manhole cover B on the road surface A. This operation is easily performed by driving the heavy equipment arm 1 downward. Then, by operating the hydraulic cylinder 6, the casing 9 and the sleeve 13, which moves up and down guided by the shaft 3 together with the casing 9, the bit mounting base 14, and the cylindrical bit 15 are positioned on the road surface A around the manhole cover B. After that, the hydraulic motor 10 is driven. Then, the rotational force of the hydraulic motor 10 is applied to the manual gear 11, the driven gear 12, and the sleeve 1.
3, the bit is transmitted to the bit mounting base 14 and the cylindrical bit 15. When the cylindrical bit 15 rotates around the shaft 3 through such rotation transmission, the tooth tips of the cylindrical bit 15 gradually dig into the ground from the road surface A, making it possible to cut the road surface in a circular shape. It is.

Such a road surface circular cutting machine has the disadvantage that, when cutting the drawing A, a large amount of noise is generated due to the friction between the tooth tip of the cylindrical bit 15 and the road surface A. In addition, in order to reduce the frictional resistance between the road surface A and the cylindrical bit 15, the cylindrical bit 1 is
5 may be sprayed with water, but in this case, there is a drawback that the water for preventing frictional resistance is blown away by the rotational force of the cylindrical bit 15 and scattered around. Furthermore, there is a danger that the cuttings of the road surface A cut by the cylindrical bit 15 will fly off, and furthermore, if the tip of the tooth of the cylindrical bit 15 is chipped, it will fly around, posing a danger to the worker. There was also the fear that it would be harmful.

This idea was devised in view of these circumstances, and it not only reduces noise by surrounding the cylindrical bit with a soundproof cover, but also protects the cylindrical bit from damage caused by water, cuttings, or chips. It was devised for the purpose of ensuring work safety by preventing the tips of the teeth from scattering into the surrounding area.

An embodiment of this invention will be described in detail below based on the drawings.

The soundproof cover for the road surface circular cutting machine of this invention includes a ceiling part 16 with an opening 15 formed in the center and a retractable cylindrical part 17 fixed to the outer periphery of the ceiling part 16.
The ceiling portion 16 and the cylindrical portion 17 are cut in the longitudinal direction, and fixtures 18 are provided on opposing sections, so that the sections can be fixed and removed from each other.

The opening 15 is connected to the shaft 3 and the hydraulic motor 10 located above the casing 9 of the road circular cutting machine.
etc. are located inside it. The ceiling portion 16 and the cylindrical portion 17 are optimally made of a material such as a synthetic resin sheet or thick cloth, but the material is not limited. The cylindrical part 17 is expandable and retractable because as the cylindrical bit 15 is successively cut into the road surface and the tip of the tooth is gradually buried in the ground, its length in the vertical direction gradually becomes shorter. desirable. Most preferably, there is a bellows-shaped structure as shown in FIG. 1 or 3. In addition, in order to prevent water, cutting materials, noise, etc. from leaking between the lower end of the cylindrical portion 17 and the road surface A, a grounding member 1 made of a flexible material such as sponge is provided.
It is desirable to provide 9. In this case, the ground contacting member 19 is well adapted to the high resistance difference of the road surface A, topography, etc., so that there is almost no gap, and the above-mentioned drawbacks can be prevented.

The fixing parts 18 provided on the two opposing sections of the ceiling part 16 and the cylindrical part 17 cut in the longitudinal direction may be made of a large number of hooks, buttons, etc., or fasteners, pullers, etc., as shown in FIG. It may be a hanging member or the like, and its type is not limited.

When using the soundproof cover for the road surface circular cutting machine of this invention having such a configuration, a frame body on which the soundproof cover is placed is provided in advance on the casing 9. As shown in detail in FIG. 2, in this frame body, a mounting ring 20 is fixed to a casing 9 with bolts 21, etc., and a support arm 24 is radially attached to a protrusion 22 provided on the outer mounting ring 20 with a pin 23. Attach ring 2 to
0, and a ring frame 26 is fixed to the tip of the support arm 24 with a pin 25. When attaching the soundproof cover of this invention to the frame prepared in this way, the fixing device 18 that fixes the two sections
Remove the soundproof cover, open it in two, put the frame inside it, and tighten the fixing part 18 again. As a result, the frame body is positioned inside the ceiling portion 16, so that the cylindrical bit 15 and the like are housed inside the soundproof cover.
By starting the above-described work, even if the cylindrical bit 15 gradually goes into the ground, the cylindrical part 17 will gradually expand and contract, making it possible to follow it. can.

Incidentally, when removing the soundproof cover, it is possible to easily remove it by performing the operation opposite to the above-mentioned installation.

As is clear from the above explanation, according to the soundproof cover for the circular road cutting machine of this invention, the cylindrical bit 15 that generates noise can be covered with the soundproof cover consisting of the ceiling part 16 and the cylindrical part 17. Therefore, most of the noise generated inside can be absorbed. Therefore, there will be no noise pollution in the vicinity of the construction site, and work can be carried out with peace of mind even in residential areas. Furthermore, it is possible to prevent water, cutting objects, the tips of the teeth of the cylindrical bit 15, etc. from scattering to the surroundings, thereby making it possible to further improve the safety of the work.

[Brief explanation of drawings]

Figure 1 is a partial vertical cross-sectional view of the road surface circular cutter of this invention using a soundproof cover, Figure 2 is an explanatory view of the frame attached to the casing, and Figure 3 is the road surface circular cutting machine of this invention. FIG. 3 shows an overall perspective view of the soundproof cover of the circular cutting machine. 15...Opening part, 16...Ceiling part, 17...Cylindrical part, 18...Fixing tool, 19...Grounding member.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. Consisting of a ceiling part with an opening in the center and a retractable cylindrical part fixed to the outer periphery of the ceiling part, and formed by cutting the ceiling part and the cylindrical part. A soundproof cover for a road surface circular cutting machine, characterized in that each section is provided with a fixture so that these two sections can be freely connected. 2. A soundproof cover for a road surface circular cutter according to claim 1, wherein the cylindrical portion has a grounding member made of a flexible material such as sponge on its lower edge.