JPH061767Y2 - Suction hood for transverse cutting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a suction hood for a traversing machine, which produces a large amount of different particles of the processing material during rotation. It is desirable that such particles be moved away from the work place to, for example, a dust suction device through a suction passage (conduit) to an air suction blower.

Dust, for example, is produced during transverse cutting of concrete, stone, brick, etc., which leaves the saw cut at the point where the transverse disc leaves the cut. With conventional technology in this field,
A dust suction device for suctioning from a place near this point is provided. Depending on factors such as the depth of cut, the size of the disc and the working method, this suction device causes dust to often circulate around the transverse disc with the air flow, thereby avoiding suction sites. , Becomes insufficient. Therefore, there is a need for improvements in hoods and suction devices, and such improvements are achieved by this invention.

According to the present invention, the problem of improving the suction of dust and the like produced is solved by the theory that when the transverse disc rotates at high speed, the air in the hood also rotates. This allows the dust to follow the air flow in the largest part of the air hood and thus the separation of dust particles is achieved by centrifugal action at the highest possible angular velocity, with the particles being close to the inner circumference of the hood. get together. Since dust is collected in this way, suction can also be effectively carried out by means of a very common suction conduit in the part of the hood furthest from the inlet. In order to improve the action of the hood as a suction casing, it is formed as part of a helix, i.e. with a tapering shape along the direction of rotation of the disc, and in particular, of the hood. Reach the suction site by the lap in full front. So the hood is formed according to this theory, and according to this invention,
The rotation of the transverse disk in the hood causes the separation of particles from the air, which causes the concentration of these particles on the inner circumference of the hood, and the suction of air and particles is achieved by the suction passage connection at the front end of the hood. To be done.

An embodiment of the present invention will be described below with reference to the drawings.

The traversing machine shown has a power saw body as a basic configuration, which includes an internal combustion engine 10, grips 11, 12, a starter 13, and a reservoir 14 and a lid 15. A transverse arm 16 is fixed to the blade support, which at its outer end has a hub 17 for a transverse disc axis 18. The transverse disc axis 18 supports the transverse disc 19 and the belt wheel 20. The transverse disc shaft 18 is therefore driven by the internal combustion engine by means of a belt transmission.

The transverse disc 19 is surrounded by more than half its circumference by a hood 21 fixed to said hub 17, which encloses the transverse disc 19 on both sides. Hood 21 is 2
It has two purposes, one being to form a protection against debris that may be released from the traverse disc 19 and which may hit the operator of the saw, and another purpose is to traverse to remove dust. Forming a suction port member around the disc 19. Therefore, the narrow front end 23 of the hood 21
A suction conduit (suction passage) is connected to the tube collar 22 at. At the opposite end 24, the hood 21 has its maximum width, where the inflow of suction air takes place. The suction air then flows along the spiral-shaped portion 25 formed by the side and outer surfaces and reaches the outlet in the tube collar 22. The direction of rotation of the transverse disc 19 indicated by arrow 26 is equal to that of air. Dust particles in the air are pushed toward the circumference of the portion 25 by the centrifugal force of the swirling air that flows through the spiral portion 25.
The particles thus become blown off along the inner circumference of the hood 21 and are guided by the air flow into the tube collar 22 where they leave the hood 21 and in the suction conduit a suction blower ( (Not shown) is further sent.

Inside the spiral-shaped part 25, the hood 21 has a pair of flat shields 27, 28, 27 of which are fixed edges 2.
It is fastened at 9 to the hub 17. The plate is
It has a gradually increasing radius r counting from the end 24 of the hood 21. The fixation to the hub 17 can be loosened, which allows the hood 21 to be adjusted at various angles with respect to the transverse arm 16. The most desirable mounting of the hood 21 in terms of dust reception is achieved when the wide end opening of the hood 21 is in the flow of generated particles of the workpiece to be processed.

[Brief description of drawings]

FIG. 1 is a front view of a transverse cutting machine provided with a suction hood. FIG. 2 is a plan view of this machine. Figure 3 shows
FIG. 3 is a cross-sectional view of the hood and the transverse cutting disk taken along line III-III in FIG. In FIG. 1, 16 is a supporting arm, 19 is a transverse disc, 2
Reference numeral 1 denotes a suction hood, and 22 denotes a suction passage connecting portion.

Claims (3)

[Scope of utility model registration request] 1. A suction hood (21) of a traversing machine having a transverse disc (19) attached to a support arm (16) by means of a bearing is located behind the hood (21) next to the support arm (16). In a suction hood for a traversing machine having a side surface and an outer surface that surrounds a part of the circumference of the traverse disc (19) between the end (24) and the front end (23) of the hood remote from the support arm (16), From one end to the other end of the hood (21), the side and outer surfaces form a spiral-shaped portion (25) with a wide end and a narrow end, the narrow end of which connects to a suction passage ( 22) is arranged, and the separation of particles such as dust from the air by the centrifugal force accompanying the rotation of the transverse disc in the hood causes concentration of these particles in the inner circumference of the hood, and the suction of air and particles is Hood (21)
Suction hood, which is achieved by a suction passage connection (22) at the front end of the suction hood. 2. A pair of shields (27, 28) are included outside the spiral-shaped portion (25), one of which is provided with a fixing means (29) near the bearing. The suction hood according to claim 1 of the utility model registration claim. 3. The shield plate (27, 28) has a spiral portion (2).
5) Suction according to claim 2, characterized in that it has a gradually increasing radius (r) relative to the spiral-shaped part (25), counting from the wide end (24) of 5). Hood.