In-hole cleaning jig

Abstract

To provide an in-hole cleaning jig capable of cleaning the inside of a hole by efficiently removing dusts or the like from the hole.SOLUTION: A dust collector suction tube 13 is connected to an upper suction port 7 of a body 3. In this state, an insertion part 5a is inserted into a hole 17 formed in, for example, a concrete execution surface 15, and the body 3 is disposed on the execution surface. In this case, a seal 11 is brought into contact with the execution surface 15 so as to surround the hole 17. When suction is performed by a dust collector, a gas in the hole 17 (in the seal 11) is sucked by the dust collector through a flow path inside the body 3, that is, between the inner surface of the body 3 and the outer surface of an a feed pipe 5. Since pressure is thus reduced in the hole 17, the gas is sucked into the hole 17 from the outside through the feed pipe 5. In other words, the gas fed from the outside is jetted out from the tip of the feed pipe 5.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a hole cleaning tool for cleaning dust and the like from inside a hole after it has been drilled for installing an anchor bolt or the like. [Background technology]

[0002] When installing an anchor bolt on the ground or wall of concrete, for example, a hole is drilled using a tool such as a drill. At this time, a lot of dust is generated, so it is desirable to remove the dust.

[0003] In response to this, a drilling tool has been proposed in which a part of the tool tip is covered with a dust collection adapter, and a suction port that collects dust from the dust collection adapter can be moved close to or away from the tool tip inside the dust collection adapter (Patent Document 1). According to Patent Document 1, the suction port can be brought close to the tool tip regardless of the diameter of the tool tip, so dust can be collected efficiently. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2009-12395 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, although the drilling tool of Patent Document 1 can collect dust that is generated during drilling and is blown out onto the work surface, it cannot efficiently collect dust that remains inside the hole after drilling. This is because, once the hole is deep enough, even if the hole is depressurized somewhat by sucking air from above with a dust collector, it is difficult to generate airflow, so most of the dust that has accumulated at the bottom of the hole remains without being sucked in. For this reason, dust inside the hole must be removed separately.

[0006] Fig. 7 is a schematic diagram showing a conventional process for cleaning the inside of a hole. As shown in Fig. 7(a), when a hole 101 is formed in concrete 100 with a tool, as described above, dust on the surface (construction surface) of concrete 100 can be removed with a dust collector, but dust remains inside hole 101.

[0007] For this reason, a dust pump 105 is usually used as shown in Fig. 7(b). The dust pump 105 has a cylindrical air supply section, and by squeezing the pump at the top, air can be ejected from the tip. For this reason, by inserting the tip of the dust pump into the hole 101 and blowing air into the hole 101, dust can be ejected from the hole 101. This is sucked up by the dust collector suction pipe 103, and the dust inside the hole 101 is removed.

[0008] Furthermore, for example, with Chemical Anchor (registered trademark) and the like, dust adhering to the inner surface of hole 101 must also be removed in order to ensure the adhesive strength of the adhesive with the inner surface of hole 101. For this reason, as shown in Fig. 7(c), it is necessary to insert brush 107 into hole 101 to scrape off dust adhering to the inner wall of the hole, and then to remove the dust from inside the hole using dust pump 105. This process must be repeated several times.

[0009] However, when it is necessary to form a large number of holes 101, such hole cleaning work takes a lot of time. In addition, since the dust pump 105, the dust collector suction pipe 103, the brush 107, etc. are used, the work may need to be done by multiple workers, and therefore a more efficient method of cleaning inside the hole is desired.

[0010] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a hole cleaning tool that can efficiently remove dust and other particles from inside a hole and clean the inside of the hole. [Means for solving the problem]

[0011] In order to achieve the above-mentioned object, the present invention provides a cleaning tool for cleaning the inside of a hole formed in a construction surface, comprising a substantially cylindrical main body, an air supply pipe arranged inside the main body, and a suction port provided on the upper part of the main body and connected to a dust collector, one end of the air supply pipe protruding downward from the main body and the other end of the air supply pipe communicating with the outside of the main body, the air supply pipe being inserted into the hole and the lower end of the main body being arranged to surround the hole and contact the construction surface, and suction being performed with the dust collector, so that dust inside the hole is sucked in by the dust collector through the main body, and air can be supplied from the outside into the hole through the air supply pipe, characterized in that the hole cleaning tool.

[0012] An external propeller is provided on the outer surface of the air intake pipe inside the main body, and an internal propeller is provided on the inner surface of the air intake pipe inside the air intake pipe, and when suction is performed with a dust collector, inside the main body, the external propeller rotates at least a part of the air intake pipe due to the exhaust flow flowing outside the air intake pipe, and the internal propeller can generate an air flow inside the air intake pipe in the direction of air intake to a hole.

[0013] A propeller is arranged inside the main body on at least one of the outer or inner sides of the air intake pipe, and the air intake pipe can be rotated by the intake air flow flowing inside the air intake pipe or the exhaust air flow flowing outside the air intake pipe, and a brush capable of cleaning the inner surface of the hole may be provided around the air intake pipe when inserted into the hole.

[0014] At least a portion of the air intake pipe in an area where the brush is disposed may be detachable.

[0015] An elastic member capable of coming into contact with an application surface may be provided at a lower end of the main body.

[0016] According to the present invention, the pressure in the hole is reduced by exhausting air from the intake port, and an air supply pipe is inserted into the hole and air is supplied from the air supply pipe into the hole, so that an air flow is generated from deep inside the hole toward the hole opening, and the dust in the hole can be efficiently ejected and removed from the hole. In this case, since the air supply pipe and the suction port are integrated, the work can be easily performed by one person.

[0017] In addition, by fixing an external propeller and an internal propeller to the outer surface and inner surface of the air intake pipe, the air intake pipe can be rotated together with the external propeller by the exhaust air flow flowing outside the air intake pipe when suction is performed by the dust collector. In addition, by rotating the air intake pipe, it is possible to generate an air flow inside the air intake pipe in the direction of air supply to the hole by the internal propeller, so that air can be supplied into the hole more efficiently.

[0018] In addition, by disposing a propeller on at least one of the outer and inner surfaces of the air intake pipe, the air intake pipe can be rotated by the air intake flow inside the air intake pipe or the exhaust flow outside the air intake pipe. Therefore, by providing a brush capable of cleaning the inner surface of the hole around the vicinity of the tip of the air intake pipe that is inserted into the hole, the brush can be rotated inside the hole to clean the inner surface of the hole.

[0019] In addition, by making the air intake pipe in the area where the brush is arranged detachable, the brush can be easily replaced. Also, the brush size can be changed according to the size of the hole.

[0020] In addition, by providing an elastic member at the bottom end of the main body that can come into contact with the construction surface, the construction surface and the main body can be brought into close contact with each other, thereby preventing air leakage. In addition, since the position and orientation of the main body can be changed somewhat by the elastic member, it can also be applied to holes that are oblique to the construction surface. Effect of the Invention

[0021] According to the present invention, it is possible to provide a hole cleaning tool capable of efficiently removing dust and the like from inside a hole and cleaning the inside of the hole. [Brief description of the drawings]

[0022] [Figure 1] FIG. 2 is a schematic diagram showing the hole cleaning jig 1. [Diagram 2] FIG. 2 is a diagram showing the hole cleaning jig 1 in use. [Diagram 3] FIG. 2 is a schematic diagram showing an inside-hole cleaning jig 1a. [Figure 4] FIG. 2 is a diagram showing a state in which the hole cleaning jig 1a is used. [Diagram 5] FIG. 4 is a schematic diagram showing an inside-hole cleaning jig 1b. [Figure 6] FIG. 4 is a diagram showing a state in which the hole cleaning jig 1b is used. [Figure 7] 13A to 13C are diagrams showing a conventional process for cleaning the inside of a hole. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] A preferred embodiment of the present invention will be described in detail below with reference to the drawings. Fig. 1 is a schematic diagram showing the structure of a hole cleaning tool 1. The hole cleaning tool 1 is used to clean the inside of a hole formed by a tool such as a drill on a construction surface such as concrete, and is used, for example, by attaching it to the tip of a hose of a dust collector. Note that in the following description, it will be described as a hole for fixing an anchor bolt or the like, but it can also be applied to holes for other purposes.

[0024] The hole cleaning jig 1 is mainly composed of a main body 3, an air supply pipe 5, etc. The main body 3 is formed in a generally cylindrical shape so that, when in use, it surrounds a hole described below and its lower end comes into contact with the construction surface. A seal 11 is provided at the lower end of the main body 3 as necessary. The seal 11 is the part that comes into contact with the construction surface and is formed of an elastic material such as soft rubber or sponge. The upper part of the main body 3 is provided with a suction port 7 that is connected to a dust collector (a suction pipe of the dust collector). In the present invention, the suction port 7 side of the main body 3 is the upper side and the seal 11 side is the lower side, but the hole cleaning jig 1 can be used in either direction.

[0025] An air intake pipe 5 is disposed inside the main body 3. The air intake pipe 5 is disposed approximately in the center of the main body 3. For example, if the cross sections of the main body 3 and the air intake pipe 5 are both approximately circular, the main body 3 and the air intake pipe 5 are disposed approximately concentrically. Note that a gap is formed between the outer surface of the air intake pipe 5 and the inner surface of the main body 3, through which air containing dust flows. The outer surface of the air intake pipe 5 and the inner surface of the main body 3 are supported by a support member (not shown) so as not to block this flow path.

[0026] One end (lower end in the figure) of the air supply pipe 5 protrudes below the main body 3 (seal portion 11). The part of the air supply pipe 5 that protrudes below the main body 3 (seal portion 11) becomes an insertion portion 5a to be inserted into a hole described below. The other end (upper end in the figure) of the air supply pipe 5 communicates with the outside of the main body 3, for example, by a pipe 9.

[0027] Here, the diameter of the air intake pipe 5 varies depending on the part. The inside of the main body 3 of the air intake pipe 5 has a relatively large inner diameter, and the insertion part 5a at the tip of the air intake pipe 5 has a relatively small inner diameter. The diameter of the insertion part 5a is set, for example, according to the minimum diameter of the target hole. For example, the diameter of the insertion part 5a is set so that it can be inserted into a hole of the smallest diameter, and a gap is formed between the outer surface of the insertion part 5a and the inner surface of the hole so that dust and the like can flow through it. By increasing the diameter of the part other than the insertion part 5a, it is possible to suppress pressure loss of the intake air flow, and by reducing the diameter of the insertion part 5a, it is possible to increase the flow rate of the air ejected from the tip. The diameter of the air intake pipe 5 may be constant.

[0028] Next, a method of using the hole cleaning jig 1 will be described. FIG. 2 is a diagram showing the hole cleaning jig 1 in use. A dust collector suction pipe 13 is connected to the suction port 7 at the top of the main body 3. In this state, the insertion part 5a is inserted into a hole 17 formed in a construction surface 15 made of concrete, for example, to place the main body 3 on the construction surface. At this time, the hole cleaning jig 1 is placed on the construction surface 15 so that the lower end (seal part 11) of the main body 3 surrounds the periphery of the hole 17 and contacts the construction surface 15. As described above, if the seal part 11 is an elastic member, it can follow the unevenness of the surface of the construction surface 15 and suppress air leakage between the construction surface 15 and the main body 3.

[0029] When suction is performed by the dust collector, the gas inside hole 17 (inside seal portion 11) is sucked into the dust collector through the flow path between the inner surface of main body portion 3 and the outer surface of air supply pipe 5 inside main body portion 3 (white arrow A in the figure). This reduces the pressure inside hole 17, so that air is supplied from the outside to the inside of hole 17 through air supply pipe 5 (black arrow B in the figure). In other words, the gas supplied from the outside is ejected from the tip of air supply pipe 5.

[0030] In this way, by using suction by the dust collector and air supply from the outside to eject air from approximately the center near the bottom (deepest part) of hole 17, it is possible to generate an air current that flows from the deep part of hole 17 toward the opening. Therefore, dust accumulated inside hole 17 can be ejected to the outside, and the ejected dust can be efficiently sucked in.

[0031] As described above, according to this embodiment, dust and the like is not simply sucked in from above hole 17, but rather insertion portion 5a of air supply pipe 5 is inserted into hole 17 and air is supplied into hole 17 while being sucked in, generating an air current directed upward from the bottom of hole 17, thereby efficiently removing dust and the like from inside hole 17. In this case, there is no need to send compressed air or the like to air supply pipe 5, and outside air is taken in by reducing the pressure caused by the suction of the dust collector, so the structure is simple.

[0032] Furthermore, by forming the sealing portion 11 from an elastic member, the construction surface 15 and the sealing portion 11 come into close contact with each other, thereby suppressing air leakage from between the sealing portion 11 and the construction surface 15. Furthermore, since the sealing portion 11 is elastically deformable, even if the hole 17 is not perpendicular to the construction surface 15, for example, the sealing portion 11 can be deformed to allow the insertion portion 5a to be inserted into the hole 17 and the airtightness provided by the sealing portion 11 can be maintained.

[0033] Next, a second embodiment will be described. Fig. 3 is a schematic diagram showing an inside-hole cleaning jig 1a according to the second embodiment. In the following description, components having the same functions as those in the inside-hole cleaning jig 1 according to the first embodiment are given the same reference numerals as in Figs. 1 and 2, and duplicated descriptions will be omitted.

[0034] The hole cleaning jig 1a has a configuration substantially similar to the hole cleaning jig 1, but differs in that an external propeller 21 and an internal propeller 23 are provided. Inside the main body 3, the external propeller 21 is fixed to the outer surface side of the air intake pipe 5. Inside the air intake pipe 5, the internal propeller 23 is fixed to the inner surface of the air intake pipe 5.

[0035] In addition, at least the portion of the air intake pipe 5 where the external propeller 21 and the internal propeller 23 are arranged (air intake pipe body 5b) is rotatable relative to the main body 3 (arrow C in the figure). For this reason, at the upper part of the air intake pipe 5, the pipe 9 communicating with the outside is connected via a rotary joint 19, and the air intake pipe body 5b and the insertion part 5a are connected via a rotary joint 19. For this reason, a part of the air intake pipe 5 (air intake pipe body 5b) is rotatable relative to the main body 3, the pipe 9, and the insertion part 5a. In the above example, the air intake pipe body 5b rotates relative to the main body 3, but the entire air intake pipe 5 including the insertion part 5a may rotate. In this case, for example, at the lower part of the air intake pipe body 5b, a support part in which a bearing or the like is arranged so as not to block the flow path as described above is provided between the outer surface of the air intake pipe 5 and the inner surface of the main body 3, and the air intake pipe 5 is supported by the main body 3.

[0036] The external propeller 21 and the internal propeller 23 rotate in opposite directions. For example, when the air intake pipe body portion 5b is rotated in a predetermined direction relative to the main body portion 3, when the external propeller 21 generates an airflow in an upward direction, the internal propeller 23 can generate an airflow in a downward direction.

[0037] Next, a method of using the hole cleaning jig 1a will be described. Fig. 4 is a diagram showing the hole cleaning jig 1a in use. As described above, the dust collector suction pipe 13 is connected to the suction port 7 at the top of the main body 3. In this state, the insertion part 5a is inserted into a hole 17 formed in a construction surface 15 made of concrete, for example, and the main body 3 is placed on the construction surface 15 so that the seal part 11 surrounds the periphery of the hole 17 and comes into contact with the construction surface 15.

[0038] As described above, when the dust collector performs suction, an airflow is generated inside the main body 3 with the flow path being between the inner surface of the main body 3 and the outer surface of the air intake pipe 5 (indicated by white arrow A in the figure). At this time, since the external propeller 21 is disposed in the flow path, the rotational force generated by the external propeller 21 rotates the air intake pipe body 5b to which the external propeller 21 is fixed.

[0039] When the air intake pipe body portion 5b rotates, the internal propeller 23 rotates together with the air intake pipe body portion 5b. As described above, the internal propeller 23 generates an airflow in the opposite direction to the external propeller 21. That is, the internal propeller 23 generates an airflow inside the air intake pipe body portion 5b toward the tip side (the direction of the insertion portion 5a).

[0040] In this way, the internal propeller 23 generates an airflow toward the tip of the air intake pipe 5. Therefore, instead of sending outside air to the tip of the air intake pipe 5 only by the negative pressure (air pressure difference) caused by the intake air of the dust collector, it is possible to add dynamic pressure by the internal propeller 23 toward the tip of the air intake pipe 5. Therefore, air can be ejected into the hole 17 more efficiently.

[0041] As described above, according to the second embodiment, the same effect as that of the first embodiment can be obtained. In addition, when suction is performed by the dust collector, the external propeller 21 rotates at least a part of the air intake pipe 5 by the exhaust flow flowing inside the main body 3 and outside the air intake pipe 5, and the internal propeller 23 can generate an air flow in the air intake pipe in the air intake direction to the hole 17. Therefore, the amount of air (air pressure) to be ejected from the tip of the air intake pipe 5 can be increased by the internal propeller 23, so that dust and the like inside the hole 17 can be ejected outside the hole 17 and sucked more efficiently.

[0042] Next, a third embodiment will be described. Fig. 5 is a schematic diagram showing a hole cleaning jig 1b according to the third embodiment. The hole cleaning jig 1b has a configuration similar to that of the hole cleaning jig 1a, but differs in that a brush 25 is provided on the outer periphery of the insertion part 5a on the tip side of the air supply pipe 5.

[0043] The portion (insertion portion 5a) to which brush 25 is fixed is detachable from the lower end of air supply pipe 5. In other words, because insertion portion 5a is detachable, brush 25 of a different size can be easily replaced according to the size of the target hole 17. In addition, when brush 25 becomes worn, insertion portion 5a (brush 25) can be replaced with a new one.

[0044] In the illustrated example, similarly to the hole cleaning jig 1a, inside the main body 3, an external propeller 21 is fixed to the outer surface side of the air intake pipe 5, and inside the air intake pipe 5, an internal propeller 23 is fixed to the inner surface of the air intake pipe 5. In this way, as described above, it is possible to supply air to the hole 17 efficiently.

[0045] On the other hand, in this embodiment, only one of the external propeller 21 and the internal propeller 23 may be used. In this case, there is no effect of increasing the amount of air supply (air supply pressure) as described above, but by providing either the external propeller 21 or the internal propeller 23, the air supply pipe 5 can be rotated. In this embodiment, as in the hole cleaning jig 1a, a rotary joint 19 is arranged on the upper part of the air supply pipe 5, and the air supply pipe 5 can be rotated relative to the piping 9 and the main body 3. At this time, a support part in which a bearing or the like is arranged so as not to block the flow path is provided between the outer surface of the air supply pipe 5 and the inner surface of the main body 3, and the air supply pipe 5 is supported by the main body 3, and the entire air supply pipe 5 including the insertion part 5a rotates.

[0046] Next, a method of using the hole cleaning jig 1b will be described. Fig. 6 is a diagram showing the hole cleaning jig 1b in use. As described above, the dust collector suction pipe 13 is connected to the suction port 7 at the top of the main body 3. In this state, the insertion part 5a is inserted into a hole 17 formed in a construction surface 15 made of concrete, for example, and the main body 3 is placed on the construction surface 15 so that the seal part 11 surrounds the periphery of the hole 17 and contacts the construction surface 15.

[0047] When suction is performed by the dust collector, as described above, an airflow is generated inside the main body 3 with the flow path being between the inner surface of the main body 3 and the outer surface of the air intake pipe 5 (white arrow A in the figure). Also, due to the negative pressure (pressure difference) caused by the exhaust to the dust collector, outside air is supplied toward the tip of the air intake pipe 5, generating a flowing airflow (black arrow B in the figure). For this reason, by disposing a propeller on at least one of the outer surface side or inner surface side of the air intake pipe 5 inside the main body 3, it is possible to rotate the air intake pipe 5 by the intake air flow flowing inside the air intake pipe 5 or the exhaust air flow flowing outside the air intake pipe 5.

[0048] When air intake pipe 5 rotates, brush 25 rotates together with insertion portion 5a. Therefore, when suction by the dust collector is started with insertion portion 5a inserted in hole 17, brush 25 rotates inside hole 17. Note that brush 25 has a gap large enough to allow dust and the like to flow from the bottom of hole 17 to the opening, so air and dust and the like ejected from the tip of insertion portion 5a are ejected to the outside of hole 17 through the gap between insertion portion 5a and hole 17.

[0049] In this way, dust and the like inside the hole 17 can be sucked in while the inner surface of the hole is cleaned by the brush 25. Since the seal portion 11 is elastically deformable, the brush 25 can be slid not only in the circumferential direction of the inner surface of the hole but also in the axial direction of the hole to perform cleaning by slightly moving the main body portion 3 up and down during suction.

[0050] As described above, according to the third embodiment, the same effects as those of the first embodiment can be obtained. In addition, by providing the brush 25 on the outer periphery of the insertion part 5a, it is possible to suck up dust in the hole 17 and clean the inner wall of the hole at the same time. Therefore, when using, for example, a chemical anchor (registered trademark), the adhesive strength of the adhesive to the inner surface of the hole can be increased.

[0051] In addition, since the brush 25 is detachable, it is possible to change the size of the brush 25 to be used, or to replace the brush 25 when it becomes worn.

[0052] Although the preferred embodiment of the present invention has been described above with reference to the accompanying drawings, the present invention is not limited to such an example. It is clear that a person skilled in the art can come up with various modified or altered examples within the scope of the technical ideas disclosed in this application, and it is understood that such examples also naturally belong to the technical scope of the present invention.

[0053] For example, it goes without saying that the configurations in each embodiment can be combined with each other. [Explanation of symbols]

[0054] 1, 1a, 1b...Hole cleaning tool 3. Main body 5...Air supply pipe 5a: Insertion section 5b………Air intake pipe body 7……Suction port 9...Piping 11....Sealing section 13……Dust collector suction pipe 15……Construction side 17……hole 19...Rotary joint 21...External propeller 23………Internal propeller 25…Brush 100………Concrete 101……hole 103……Dust collector suction pipe 105...Dust pump 107………Brush

Claims

1. A cleaning tool for cleaning the inside of a hole formed on a construction surface, A substantially cylindrical main body portion; an air intake pipe disposed inside the main body; A suction port provided on an upper portion of the main body and connected to a dust collector; Equipped with One end of the air intake pipe protrudes downward from the main body, and the other end of the air intake pipe communicates with the outside of the main body, This hole cleaning tool is characterized in that the air supply pipe is inserted into the hole, the lower end of the main body is positioned so that it surrounds the hole and contacts the construction surface, and suction is performed using a dust collector, so that dust inside the hole is sucked up by the dust collector through the main body, and air can be supplied into the hole from the outside through the air supply pipe.

2. An external propeller is provided on an outer surface of the air intake pipe inside the main body, and an internal propeller is provided on an inner surface of the air intake pipe inside the air intake pipe, The hole cleaning tool described in claim 1, characterized in that when suction is performed by a dust collector, the external propeller rotates at least a part of the air intake pipe due to the exhaust flow flowing inside the main body and outside the air intake pipe, and the internal propeller generates an air flow inside the air intake pipe in the direction of air supply to the hole.

3. a propeller is disposed inside the main body on at least one of an outer surface side or an inner surface side of the air intake pipe, and the air intake pipe can be rotated by an intake air flow flowing inside the air intake pipe or an exhaust air flow flowing outside the air intake pipe; 2. The hole cleaning tool according to claim 1, further comprising a brush provided around the air supply pipe inserted into the hole for cleaning the inner surface of the hole.

4. 4. The hole cleaning tool according to claim 3, wherein at least the air supply pipe in the area where the brush is disposed is detachable.

5. 2. The hole cleaning tool according to claim 1, wherein an elastic member capable of coming into contact with a work surface is provided at a lower end of the main body.

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