JPH04339991A - Cleaner for inside of pit - Google Patents

Abstract

PURPOSE:To remove foreign matters in a pit by a method in which a cylinder to be inserted into a pit and having a passage inside is connected to the suction side of an ejector and a valve is connected to the exhaust side of the ejector. CONSTITUTION:A cylinder 1 has a passage through which foreign matters in a pit are passed by bowing away or air stream sucked and its one end is to be inserted into a pit. The other end of the cylinder 1 is connected to an ejector 2, and a valve 3 is connected to the exhaust side of the ejector 2. The nozzle 1a on the tip of the cylinder 1 is inserted into the pit, and the valve 3 on the exhaust side of the ejector 2 is opened to supply compressed air to the ejector 2, whereupon suction air stream is produced in the cylinder 1 by the ejector 2 to remove foreign matterns in the pit by suction.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hole cleaner for removing foreign matter inside a blind hole drilled in bedrock or a structural member of a building or machine.

0002

BACKGROUND OF THE INVENTION It is common practice to drill blind holes in rock or concrete blocks and fill the holes with a static crushing agent to crush the rock or the like. Furthermore, blind holes are drilled in the structural members of buildings and anchor bolts are buried in the holes, and blind holes are drilled in the structural members of machines and the holes are tapped. The blind hole drilling operation is performed using a tool selected depending on the workpiece, and as the operation progresses, chips, shavings, chips, etc. are generated. All of these chips and the like are not discharged to the outside during the drilling process, but some remain in the hole when the drilling process is completed. In addition to chips, cutting agents added to the tool may also remain in the hole, and if the hole is in bedrock, rainwater or the like may accumulate. Chips, cutting agents, accumulated rainwater, etc. remaining in the hole (hereinafter referred to as ``foreign objects'') are removed when performing secondary operations such as filling the hole with static crushing agent, filling with mortar, etc., and tapping. Since it is a hindrance, it is generally removed from within the hole.

[0003] In order to remove foreign matter in the hole, a tool is used which has a cylindrical body at the tip having dimensions that can be inserted into the hole, and a valve connected to an air compressor to introduce pressurized air into the cylindrical body. A method is used in which foreign matter is blown away by opening a valve and injecting pressurized air into the hole. Furthermore, when the foreign matter is liquid, a method is also used in which the valve of the tool is connected to the suction side of a blower, fan, vacuum pump, etc. to suck out the foreign matter within the hole.

0004

[Problems to be Solved by the Invention] When removing foreign matter in the hole with the above-mentioned conventional tools, the valve is operated by an air compressor, blower, fan, or vacuum depending on whether the foreign matter is blown away or suctioned. It is necessary to selectively connect to pumps, etc. However, even if a pressure air supply source such as an air compressor is installed at a work site such as a construction site or a factory, a suction source such as a blower is not always available. Even if it is a liquid, it is generally removed by blowing it away. For this reason, there is a problem in that liquid and small foreign matter eject from the hole and contaminate the area around the hole. In addition, the above-mentioned conventional tool simply circulates pressurized air inside the cylindrical body, and when removing foreign matter by injecting pressurized air from the cylindrical body, the foreign matter flies out from the entire circumference of the hole, and the particle size or nature of the foreign matter is In some cases, there is a risk of harm to the surrounding area.

[0005] An object of the present invention is to selectively blow or suction foreign matter in a hole by supplying only pressurized air, and to blow away or suck out foreign matter in a hole. An object of the present invention is to provide a hole cleaner capable of regulating the direction of scattering of water.

[0006]

[Means for Solving the Problems] In order to solve the above problems, the hole cleaner according to the present invention has one end inserted into the hole, and has an air flow that blows away or sucks foreign matter in the hole. a cylindrical body having a passage through which foreign matter flows; an ejector whose suction side is connected to the other end of the cylindrical body and generates a suction air flow inside the cylindrical body using supplied pressurized air; and an exhaust side of the ejector. The hood includes a valve provided on the cylindrical body, and a hood slidably and fixedly provided on the cylindrical body to regulate the scattering direction of foreign matter.

[0007]

[Operation] According to the above-mentioned hole cleaner, when the valve provided on the exhaust side of the ejector whose suction side is connected to the end of the cylindrical body is opened to supply pressurized air to the ejector, the ejector sucks air into the inside of the cylindrical body. Can generate airflow. Therefore, by inserting the tip of the cylindrical body into the hole, it is possible to suction and remove foreign matter inside the hole. Also, when the valve is closed and pressurized air is supplied to the ejector, the supplied pressure air flows back inside the ejector, passes through the inside of the cylinder, and is ejected from the tip of the cylinder, causing foreign particles in the hole to be removed. It can be removed by blowing away. Therefore, even in a construction site or factory without a suction source such as a blower, the foreign matter in the hole can be selectively blown away or suctioned out depending on the nature of the foreign matter. Furthermore, the hood that regulates the scattering direction of foreign matter is slidably and fixedly provided on the cylindrical body, so when the foreign matter is blown away, the hood can be slid along the cylindrical body and placed at the opening of the hole. By fixing it, foreign matter can be blown out through the hood.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the hole cleaner according to the present invention will be described below with reference to the drawings. FIG. 1 is a side view of the hole cleaner, and FIG. 2 is a sectional view of the ejector section. The hole cleaner A shown in the figure removes solid matter such as chips, cutting agents, liquid matter such as rainwater, etc. inside the hole (not shown) by supplying pressurized air from an air source such as an air compressor. The structure is such that the foreign matter can be removed by blowing or suction, and the direction of scattering of the blown foreign matter can be controlled. In other words, even if you are at a construction site or factory without a negative pressure source such as a blower, fan, or vacuum pump, if there is an air source that can supply pressurized air, the foreign material can be sucked out depending on the nature of the foreign material in the hole. It is constructed so that it can be removed.

As shown in FIG. 1, this in-hole cleaner A has a cylindrical body 1 having an outer diameter smaller than the inner diameter of a hole (not shown).
, an ejector 2 connected to the end of the cylinder 1, a valve 3 connected to the exhaust side of the ejector 2, and a hood 4 slidably and fixedly attached to the cylinder 1. Further, the ejector 2 is connected via a valve 5 to an air compressor (not shown).

The cylindrical body 1 has a nozzle 1a formed at its tip inserted into a hole to blow away or suck out foreign matter, and is a cylindrical body having a passageway through which air is circulated and the sucked foreign matter is circulated. It is formed in the shape of a rectangular tube. A clogging prevention tool 6 formed by bending a metal rod is provided in the nozzle 1a of the cylindrical body 1, and the particle size of solid foreign matter sucked by the clogging prevention tool 6 is regulated. The clogging prevention device 6 may be formed into a net shape and attached to cover the opening of the nozzle 1a. The cylinder 1 is detachably attached to a connecting member 7 attached to the suction side of the ejector 2. That is, a nut 1b is provided at the rear end of the cylinder 1,
By screwing this nut 1b into the connecting member 7, it is configured to be connectable to and detachable from the ejector 2. Therefore, it is possible to prepare a plurality of cylindrical bodies 1 having different thicknesses and to select and use an appropriate cylindrical body 1 according to the inner diameter of the hole.

[0011] The ejector 2 ejects the supplied pressurized air in one direction of the passage, and generates a suction air flow by applying negative pressure to the interior of the cylinder 1 on the upstream side of the passage. As shown in FIG. 2, the ejector 2 includes an ejector main body 8 and an ejector nozzle 9 fitted into the ejector main body 8. In this embodiment, the ejector nozzle 9 is screwed onto the ejector main body 8, thereby fitting and fixing the ejector nozzle 9 to the ejector main body 8. A nipple 8a for attaching the valve 5 is provided at a predetermined position on the outer circumference of the ejector body 8.
A through hole 8b is formed to provide electrical continuity between the ejector body 8 and the inside of the ejector body 8. A ring-shaped groove 9a is formed on the outer periphery of the ejector nozzle 9 at a position facing the through hole 8b. ) A plurality of orifices 9b are formed at an angle. Therefore, when pressurized air is supplied from the through hole 8b of the ejector body 8, this pressurized air is ejected from the orifice 9b formed in the ejector nozzle 9, generating an air flow in the direction of the arrow on the suction side (left side in FIG. 2). It is possible to do so. Ejector nozzle 9 which is the suction side of the ejector 2
A connecting member 7 for attaching the cylinder 1 is attached to the end 9c of the ejector 2, and a valve 3 is attached to the end 8c of the ejector main body 8, which is the exhaust side of the ejector 2. That is, a nut 9d is provided at the end 9c of the ejector nozzle 9, and the ejector 2 and the connecting member 7 are connected by screwing this nut 9d to the connecting member 7. A socket 8d is fixed to the end 8c of the ejector main body 8, and the ejector 2 and the valve 3 are connected by screwing a nut 8e of the socket 8d to the valve 3.

The valve 3 opens the exhaust side of the ejector 2 to exhaust the pressure air supplied to the ejector 2 to generate a suction air flow inside the cylinder 1, or closes the exhaust side of the ejector 2. The pressurized air supplied to the ejector 2 is made to flow backwards and is injected from the nozzle 1a of the cylindrical body 1. As the valve 3, a ball valve is used in this embodiment. The passage of this valve can be opened or closed by rotating the handle 3a by 90 degrees, and when the valve is opened, the internal passage can be fully opened in a straight line. Therefore, by fully opening the valve 3, it is possible to suction solid foreign matter without any problem. However, the valve 3 is not limited to a ball valve, and other valves such as a gate valve and a butterfly valve may also be used. When a suction air flow is generated in the cylindrical body 1 and the foreign matter in the hole is suctioned,
Preferably, the aspirated foreign matter is contained in a container. For this reason, in this embodiment, the exhaust side of the valve 3 is connected to a dust collector (not shown) via a hose 10.

The valve 5 is connected to an air compressor via a hose 11, and serves to supply and cut off pressurized air to the ejector 2. Therefore, the valve 5 does not need a function to allow solid foreign matter to flow, and a valve such as a globe valve or an angle valve used in ordinary air piping can be used. In this embodiment, the ejector 2
A ball valve is used, which can quickly supply or cut off pressurized air to the valve, and which is easy to open and close.

[0014] The hood 4 regulates the scattering direction of foreign matter in the hole when the foreign matter is blown away. This hood 4 includes a sliding member 4a that slides along the outer periphery of the cylinder 1, a nut 4b that is screwed onto the sliding member 4a to fix the member 4a, and a hood that is fixed to the sliding member 4a. It is composed of a member 4c. The sliding member 4a is constituted by a cylindrical member having an inner shape substantially equal to the outer diameter of the cylinder 1, and a thread such as a taper thread for screwing the nut 4b is formed at the end thereof. By forming a plurality of slits in the screw in the axial direction, it is possible to fix the sliding member 4a at a predetermined position on the cylinder body 1 by tightening the nut 4b. The hood member 4c is formed into an elbow shape having an outer diameter that is approximately equal to or smaller than the diameter of the drilled hole. This hood member 4c is fixed to the sliding member 4a by a method such as welding.

The procedure for removing foreign matter in a hole using the hole cleaner A constructed as described above will be explained. If the foreign matter in the hole is a liquid or a solid matter with a small particle size, and when such foreign matter is to be removed by suction, the valve 5 and the air compressor are connected via the hose 11, and the valve 3 and the dust collector are connected. are connected via hose 10. The nut 4b is loosened and the hood 4 is placed and fixed at a position equal to the depth of the hole or at a position retreating from the depth of the hole. The nozzle 1a provided at the tip of the cylindrical body 1 is inserted into the hole, and the valve 3 and the valve 5 are opened to supply pressurized air to the ejector 2. Ejector 2
The pressurized air supplied to the valve 3 is ejected from the orifice 9b to the valve 3 side, and generates a suction air flow in the direction of the arrow a inside the cylinder body 1. With the generation of this suction air flow, foreign matter in the hole is suctioned, and the inside of the cylinder 1, the ejector nozzle 9,
It passes through the ejector body 8 and the valve 3 and is housed in the dust collector. Therefore, it is possible to remove foreign matter without contaminating the area around the hole with foreign matter.

When removing foreign matter in the hole by blowing it away, insert the nozzle 1a formed at the tip of the cylindrical body 1 into the hole, slide the hood 4 along the cylindrical body 1, and remove the hood member 4c. is placed in the opening of the hole and fixed. and valve 3
is closed and the valve 5 is opened to supply pressurized air to the ejector 2. Since the exhaust side of the ejector 2 is closed by the valve 3, the pressurized air supplied to the ejector 2 flows backward through the ejector 2 and is ejected from the nozzle 1a of the cylinder 1 into the hole. Foreign matter in the hole is blown away by the pressurized air jetted from the nozzle 1a, and the hood member 4c restricts the scattering direction to only the direction of arrow b and removes it to the outside. Therefore, the scattering direction of foreign matter is restricted to one direction, so that the work can be carried out safely.

In the above-described embodiment, the cylinder 1 is formed in a straight line, but it is not limited to this shape, and may be formed with a tip or a predetermined part bent.

[0018]

Effects of the Invention As described above in detail, according to the hole cleaner according to the present invention, by opening the valve provided on the exhaust side of the ejector and supplying pressurized air, suction air can be drawn into the inside of the cylinder. Foreign matter in the hole can be suctioned and removed by generating a flow. Furthermore, by closing the valve and supplying pressurized air, the pressurized air can be ejected from the tip of the cylindrical body to blow out and remove foreign matter in the hole. Further, since the hood for regulating the scattering direction of foreign matter is slidably and fixedly provided on the cylinder body, the scattering direction of the foreign matter can be regulated when the foreign matter is blown away. Therefore, at a construction site or factory that has a pressurized air source such as an air compressor, it is possible to remove the foreign matter by suction or blowing it away depending on the nature of the foreign matter in the drilled hole, and also to prevent it from scattering. This feature allows the work to proceed safely by regulating the direction of foreign objects.

[Brief explanation of drawings]

FIG. 1 is a side view of an in-hole cleaner.

FIG. 2 is a sectional view of the ejector section.

[Explanation of symbols]

A is a hole cleaner, 1 is a cylinder, 1a is a nozzle, 2 is an ejector, 3 and 5 are valves, 4 is a hood, 4a is a sliding member, 4b is a nut, 4c is a hood member, 6 is a clogging preventer , 7 is a connecting member, 8 is an ejector main body, 9 is an ejector nozzle, 9a is a groove, 9b is an orifice, and 10 and 11 are hoses.

Claims (1)

[Claims] 1. A cylindrical body having one end inserted into a hole and having an air flow for blowing off or suctioning foreign matter in the hole and a passage for circulating the suctioned foreign matter, and a suction side of the other end of the cylindrical body. an ejector that is connected to the end and generates a suction air flow inside the cylinder by supplied pressurized air;
An in-hole cleaner comprising: a valve provided on the exhaust side of the ejector; and a hood slidably and fixedly provided to the cylindrical body for regulating the scattering direction of foreign matter.