Patent Publication Number: US-2009217482-A1

Title: Anchor Bolt Hole Cleaning Device

Description:
TECHNICAL FIELD 
     The present invention relates to an anchor bolt hole cleaning device suitable for cleaning cutting powder, etc. in an anchor bolt hole. 
     BACKGROUND ART 
     In the case of fixing a device or the like on a concrete surface, an anchor bolt hole is drilled on the concrete surface using a vibrating drill or the like, and an anchor bolt is planted in the anchor bolt hole. Thus, the device or the like is fixed on the concrete surface. 
     There are so-called a resin anchor and a mortar anchor, in which the anchor bolt is planted in the anchor bolt hole by an adhesive force of resin or mortar filled between the anchor bolt hole and the anchor bolt. In the present DESCRIPTION and CLAIMS, these anchors may be collectively and simply called “resin anchor”. 
     In the case of the resin anchor, if there are cutting powder and dust inside the anchor bolt hole (on an inner peripheral surface and a bottom portion), a resistance of the anchor bolt to a pull-out force deteriorates significantly. 
     Therefore, it is necessary that cutting powder, etc. do not remain in the drilled anchor bolt hole, that is, it is necessary that foreign matters (simply referred to as “cutting powder” in the present DESCRIPTION and CLAIMS) such as cutting powder do not get in between the anchor bolt hole and an outer peripheral surface of the anchor bolt. 
     On this account, various anchor bolt hole cleaning devices have been provided. Specifically, provided is a device which scrapes out cutting powder, etc. by inserting into the drilled anchor bolt hole a rod-like cleaning tool with a brush disposed on its periphery (see Patent Document 1). Moreover, provided is a device which scrapes out cutting powder, etc., adhered to the inner peripheral surface of the anchor bolt hole, by a brush of a cleaning tool which is made by disposing the brush on a periphery of a core rod and on an upper end portion of which a cover is formed, and suctions the scraped cutting powder from a suction opening (see Patent Document 2). 
     Patent Document 1: Japanese Utility Model Application Publication 07-15210 
     Patent Document 2: Japanese Utility Model Application Publication 64-1728 
     DISCLOSURE OF THE INVENTION 
     Problems to be Solved by the Invention 
     However, although the device described in Patent Document 1 excels in that its configuration is simple, it cannot adequately scrape out fine cutting powder, especially fine cutting powder accumulated on the bottom portion. 
     Moreover, although the device described in Patent Document 2 can suction fine cutting powder from the suction opening, it is difficult to scrape out comparatively large cutting powder accumulated on the bottom portion by its brush or suctioning. 
     In view of these circumstances, an object of the present inventor is to provide an anchor bolt hole cleaning device which has a simple configuration, can scrape out cutting powder adhered to the inner peripheral surface of the anchor bolt hole, and can also effectively scrape out both fine and comparatively large cutting powder accumulated on the bottom portion. 
     Means for Solving the Problems 
     The above object of the present invention can be achieved by the anchor bolt hole cleaning device having the following configuration. 
     An anchor bolt hole cleaning device according to the present invention is provided with a brush on a peripheral portion thereof and is capable of cleaning cutting powder adhered to a hole inner peripheral surface, the anchor bolt hole cleaning device comprises a suction nozzle which is able to be inserted into an anchor bolt hole to suction the cutting powder, the suction nozzle includes a main body that is a tubular body, a suction opening formed at a tip end portion of the main body, and an exhaust opening which is formed at a base end portion of the main body to be connected to a tip end of a suction hose whose base end is connected to a suction opening of a suction device, and the brush is disposed on an outer peripheral surface of the main body. 
     In accordance with the anchor bolt hole cleaning device according to the present invention having the above-described configuration, the cutting powder adhered to the inner peripheral surface of the anchor bolt hole can be scraped and dropped to the bottom portion side by the brush disposed on the outer peripheral surface of the main body of the suction nozzle inserted into the anchor bolt hole such that the tip end of the suction nozzle faces the bottom side of the hole, and the scraped cutting powder and the cutting powder accumulated on the bottom portion of the hole can be suctioned toward the suction device side from the suction opening formed at the tip end portion of the suction nozzle. 
     Therefore, the cutting powder can be effectively removed from the anchor bolt hole. 
     In addition, a conventional case requires three steps of suctioning the cutting powder by the suction nozzle after the drilling of the anchor bolt hole, scraping and dropping the cutting powder adhered to the inner peripheral surface of the hole, and again suctioning the scraped cutting powder by the suction nozzle. However, in accordance with the anchor bolt hole cleaning device according to the present invention, all the cutting powder, etc. in the hole is surely suctioned outside by so-called one-touch cleaning in which the tip end of the suction nozzle is simply inserted into the anchor bolt hole, and the cutting powder, etc. adhered to the inner peripheral surface of the hole is scraped and dropped by the brush disposed on the outer peripheral surface of the main body. Therefore, the cleaning operation can be carried out extremely effectively, some steps can be omitted, and a workload of a worker can be reduced. 
     Moreover, in the anchor bolt hole cleaning device according to the present invention, in a case where the suction opening is formed at a tip end of the main body, the cutting powder, etc. accumulated on the bottom portion of the hole can be effectively suctioned outside from the suction opening since the suction opening opens toward the bottom portion of the hole. 
     Further, in the anchor bolt hole cleaning device according to the present invention, in a case where the brush is disposed on the outer peripheral surface of the main body in a spiral manner, the cutting powder adhered to the hole inner peripheral surface can be effectively scraped and dropped on the bottom portion of the hole by rotating the suction nozzle in the hole. 
     Furthermore, in the anchor bolt hole cleaning device according to the present invention, even in a case where a plurality of the brush having a ring shape are disposed at different levels of height on the outer peripheral surface of the main body, the cutting powder adhered to the inner peripheral surface of the hole can be effectively scraped and dropped on the bottom portion of the hole by moving the suction nozzle upward and downward and can suction the cutting powder. 
     Effects of the Invention 
     In accordance with the anchor bolt hole cleaning device according to the present invention having the above-described configuration, it is possible to realize an anchor bolt hole cleaning device which has a simple configuration, can scrape out cutting powder adhered to the inner peripheral surface of the anchor bolt hole, and can also effectively scrape out both fine and comparatively large cutting powder accumulated on the bottom portion. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS  
         FIG. 1  is a side view showing the entire configuration of a suction nozzle of an anchor bolt hole cleaning device according to an embodiment of the present invention. 
         FIG. 2  is a side view showing the entire configuration of the suction nozzle of the anchor bolt hole cleaning device according to an embodiment different from that of  FIG. 1 . 
         FIG. 3  is an enlarged partial side view showing the configuration of a portion where a brush of the suction nozzle shown in  FIG. 2  is disposed. 
         FIG. 4  is a side view showing the entire configuration of the suction nozzle of the anchor bolt hole cleaning device according to an embodiment different from those of  FIGS. 1 and 2 . 
         FIG. 5  is a conceptual diagram showing a state where the anchor bolt hole is cleaned using the anchor bolt hole cleaning device having the suction nozzle of the embodiment shown in  FIG. 1 . 
         FIG. 6  is a side view showing the entire configuration of the suction nozzle of the anchor bolt hole cleaning device according to an embodiment different from those of  FIGS. 1 ,  2  and  4 . 
         FIG. 7  is an enlarged partial side view showing the configuration of a tip end portion of the suction nozzle. 
     
    
    
     EXPLANATION OF REFERENCE NUMBERS 
     A anchor bolt hole cleaning device 
     B suction nozzle 
       1  main body 
       1 S outer peripheral surface 
       2  brush 
       1 A suction opening 
       1 B exhaust opening 
       7  suction device 
       7   a  suction opening 
       8  anchor bolt hole 
       8 S hole inner peripheral surface 
       9  suction hose 
     BEST MODE FOR CARRYING OUT THE INVENTION 
     Embodiment 1 
     Hereinafter, an anchor bolt hole cleaning device according to an embodiment of the present invention will be specifically explained with reference to the drawings. 
       FIG. 1  is a side view showing the entire configuration of a suction nozzle of the anchor bolt hole cleaning device according to an embodiment of the present invention. 
     An anchor bolt hole cleaning device A according to the embodiment of the present invention includes a suction nozzle B shown in  FIG. 1 . The suction nozzle (hereinafter may be simply referred to as “nozzle”) B includes a main body  1  that is a tubular body, and a brush  2  disposed on an outer peripheral surface  1 S of the main body  1  along a longitudinal direction. 
     At a tip end of the main body  1 , a suction opening  1 A is formed, which opens obliquely with respect to the longitudinal direction. At a base end of the main body  1 , an exhaust opening  1 B is formed, which opens in a direction perpendicular to the longitudinal direction. The main body  1  includes a base end portion  1 C that is a straight tubular shape, and a portion  1 L which extends from a lower end  1   e  of the base end portion  1 C to the suction opening  1 A below the lower end  1   e  and is a tapered tubular body whose diameter gradually decreases in a downward direction. 
     Although the material of the suction nozzle B is not especially limited, it is preferable to use plastic in light of weight reduction and mass production at low cost. 
     As shown in  FIG. 1 , in Embodiment 1, the brush  2  is disposed only at a lower end portion of the tapered tubular body of the main body  1 . However, the brush  2  may be disposed so as to extend up to a position on the base end side above the position shown in  FIG. 1 . 
     Moreover, in Embodiment 1 shown in  FIG. 1 , the brush  2  is disposed on the outer peripheral surface  1 S of the main body  1  in a spiral manner. As shown in  FIG. 1 , in the case of forming the main body  1  with a mold or the like, the brush  2  may be directly disposed on the outer peripheral surface  1 S of the main body  1 . Alternatively, as shown in  FIG. 2 , in the case of integral molding, a spiral groove  1 D may be formed on the outer peripheral surface of the main body  1 , and then a band-like body  3  with the brush  2  disposed on its surface may be put in the groove  1 D by adhesion, fitting, or the like. This is preferable since the integral molding of the main body  1  can be carried out easily. 
     When in use, a tip end of an accordion hose  5  is connected to the exhaust opening  1 B of the main body  1  as shown in  FIG. 5 , and a base end of the hose  5  is connected to a suction opening  7   a  of a suction device (a vacuum cleaner is used as the suction device in Embodiment 1)  7  via a conventional hose  9 . 
     As shown in  FIG. 5 , after drilling an anchor bolt hole  8  with a concrete drill or the like, the nozzle B is inserted in the anchor bolt hole  8  such that the suction opening  1 A is directed toward the hole (the suction opening  1 A is located on the lower end side in  FIG. 5 ). In this state, by turning on a switch of the suction device  7 , cutting powder, etc. in the anchor bolt hole  8  is suctioned from the suction opening  1 A. The cutting powder adhered to an inner peripheral surface  8 S of the anchor bolt hole  8  can be scraped and dropped to the hole bottom portion from the inner peripheral surface  8 S of the hole by the brush  2  by causing the nozzle B to move upward and downward, rotate, etc., if necessary, and the scraped cutting powder, etc. is suctioned from the suction opening  1 A together with the cutting powder accumulated on the hole bottom portion. 
     As a result, the cutting powder, etc. in the anchor bolt hole  8  is effectively suctioned outside the hole from the suction opening  1 A through the exhaust opening  1 B, and the cutting powder, etc. do not remain in the hole. 
     Therefore, in a case where an anchor bolt (not shown) is planted in the anchor bolt hole  8  in this state, and resin or mortar is filled in a gap therebetween, a desired resistance to the pull-out force can be obtained since there are no cutting powder between the anchor bolt and the anchor bolt hole. 
     As described above, since all the cutting powder can be quickly and easily suctioned from the anchor bolt hole  8 , the anchor bolt hole cleaning device is especially preferable in the case of forming so-called chemical anchor or mortar anchor. To be specific, in the case of the chemical anchor and the mortar anchor, the presence or absence of the cutting powder, etc. remaining in the anchor bolt hole  8  significantly affects the performance of the filler, and also significantly affects the resistance of the anchor bolt to the pull-out force. However, in the present anchor bolt hole cleaning device A, since the cutting powder, etc. in the hole are removed surely and effectively, the cutting powder does not mix with the filler, the filler is effectively filled between the anchor bolt hole  8  and the anchor bolt (not shown), thereby obtaining the desired high resistance to the pull-out force. 
     Embodiment 2 
     As another embodiment regarding the nozzle B, as shown in  FIG. 4 , ring-like brushes  2  may be disposed at different levels of height on the outer peripheral surface  1 S of the main body  1 . 
     In the anchor bolt hole cleaning device shown in  FIGS. 1 ,  2  and  4 , the suction opening  1 A opens obliquely with respect to the longitudinal direction (see a direction of a central axis shown by a chain line). However, as shown in  FIG. 6 , the suction opening  1 A may open so as to be perpendicular to the longitudinal direction. In such a case, as shown in  FIG. 7 , some concave-convex portions may be formed on an opening end surface  1   a  of the suction opening  1 A so that the suction is effectively carried out even in a state in which the suction opening  1 A contacts the bottom surface, etc. of the hole. Note that in  FIGS. 6 and 7 , the same reference numbers are used to denote the same or corresponding components as in  FIGS. 1 ,  2  and  4 , and detailed explanations thereof are omitted. 
     Although the foregoing described that the cutting powder adhered to the inner peripheral surface  8 S of the hole is scraped and dropped to the hole bottom portion by the brush  2 , it goes without saying that the brush  2  may scrape out the cutting powder outside the anchor bolt hole  8  depending on the type of usage. 
     INDUSTRIAL APPLICABILITY 
     An anchor bolt hole cleaning device according to the present invention can be used for, for example, cleaning an anchor bolt hole, etc.