JP2007023764A - Anchor nut fixing tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem wherein a conventional anchor nut fixing tool is not good in a series of working efficiency up to the release from fixation of an anchor nut due to having a danger of falling-off of a driving bar from a driving bar inserting guide pin. <P>SOLUTION: This fixing tool has a seat on an outer peripheral surface of the driving bar inserting guide pin having a through-insertion-hole of the driving bar, and fixes the anchor nut by pressing the driving bar by seating the seat on a prepared hole opening surface by inserting the anchor nut into a prepared hole in a joined state by threadedly joining the anchor nut to the lower end of the driving bar inserting guide pin, and is constituted so that the driving bar and the driving bar inserting guide pin engage via key members whose both co-rotate and allowing the independent movement of the driving bar, and the anchor nut is threadedly joined by making the driving bar and the driving bar inserting guide pin co-rotate by rotary operation of the upper end of the driving bar, and a wedge body is pushed in by independently moving the driving bar under a guide of the key members by driving-in operation of the driving bar upper end. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an anchor nut fixing tool used when fixing a load-supporting anchor nut in civil engineering, construction, or the like.

Technical background

A conventional anchor nut fixing tool is a hitting bar in which an anchor nut is screwed into the tip of a hitting bar insertion guide pin and inserted into a pilot hole, and a wedge body inserted into the anchor nut is inserted into the guide pin. There is a type in which the wedge body is pushed in and the wedge body is pushed in so that the split cylinder portion of the anchor nut is expanded and fixed. (For example, see Patent Document 1)
JP2004-251080

  The anchor nut fixing tool of Patent Document 1 described above is a series of processes from attaching the anchor nut to the fixing tool, fixing the anchor nut to the wall, and then releasing the fixing tool and the anchor nut. The work efficiency was poor because the work was done manually. In addition, after the work, when the guide pin is held around with a spanner and rotated in the opposite direction to release it from the fixed anchor nut, the hitting bar will fall naturally, especially when it is installed at high places or ceiling installation work. The danger of dropping the rod was a problem.

  The present invention provides an anchor nut fixing tool that solves the above problems. There is a seat on the outer peripheral surface of the hitting rod insertion guide pin having a hitting hole for the hitting rod, and a female screw cylinder at the upper end of the anchor nut is screwed and connected to the outer peripheral surface of the male screw provided at the lower end of the hitting rod insertion guide pin. Then, the anchor nut is inserted into the pilot hole in the coupled state, the insertion depth of the anchor nut is set by seating the seat on the pilot hole opening surface by the insertion, and the hitting stick inserted through the insertion hole. In the fixed tool that pushes the wedge body that fits into the anchor nut by pressing and expands the split tube portion of the anchor nut and bites and fixes it to the inner wall surface of the hole in the wall, The rod insertion guide pin is engaged with each other through a key member that rotates around the axis and allows the single movement of the hitting rod in the axial direction. Stick insertion guide pin and key member And allowed through co around achieving screwing binding of the anchor nut, also has a configuration to achieve the pushing of the wedge member by driving operation of the tapping rod upper end brought solely moving the tapping rod under the guidance of the key member.

  As a result, when the tool is fixed to the ceiling manually, the hitting bar and the hitting bar insertion guide pin are engaged via the key member even when the tool is turned upside down, preventing the risk of the hitting bar falling off. did.

  In addition, by using a key member that forms a hanging device for tying a string or chain, one end of the string tied to the carrying device is tied to the work belt of the worker, so that it can be used at the time of carrying at high altitude work. The risk of falling of this tool was prevented.

  Further, the rotary operation head portion at the upper end of the hitting bar of the anchor nut fixing tool of the present invention is mounted on an electric hammer drill of three modes switching between vibration drive mode, forward rotation drive mode, and reverse rotation drive mode. A series of operations of screwing and connecting the anchor nut fixing tool and the anchor nut of the invention, pushing the hitting rod, and releasing the connection of the hitting rod insertion guide pin and the anchor nut after fixing the anchor nut are accelerated, and work efficiency is improved. Enhanced

  The electric hammer drill for switching between the three modes of the vibration drive mode, the forward rotation drive mode, and the reverse rotation drive mode used in the present embodiment is an existing electric hammer drill and is a generally known technique, and therefore has a detailed configuration. Description of is omitted.

  An embodiment of the present invention will be described with reference to FIGS. In addition, the up-down direction in description in this specification is based on the attached drawing, and shows a relative positional relationship.

  FIG. 1 is an overall sectional view of an anchor nut d1 coupled to an anchor nut fixing tool of the present invention.

  The anchor nut fixing tool of the present invention shown in FIG. 1 has a hitting bar insertion guide pin b1 as a main body, and has a through hole b4 of the hitting bar a1 which is provided on the shaft core of the guide pin b1.

  The seat c1 is screwed into a male screw b3 provided on the outer peripheral surface of the hitting rod insertion guide pin b1, and the vertical position of the seat c1 is adjusted by the screwing amount. Further, the hitting rod insertion guide pin b1 The male screw b6 provided at the lower end of the screw threadedly engages with the female screw d2 of the anchor nut d1 and has a hitting bar a1 that is inserted into the insertion hole b4.

  As shown in FIG. 1 and FIG. 2, the hitting stick a1 has a guide hole a2 orthogonal to the axis, and a key member a3 longer than the length of the guide hole a2 is inserted and disposed in the guide hole a2. The end of the key member a3 protrudes from the outer peripheral surface of the hitting stick a1.

  As shown in FIGS. 1, 2, and 3, the hitting rod insertion guide pin b1 is a slide in which the key member a3 orthogonal to the guide hole a2 of the hitting rod a1 is guided so as to be movable in the axial direction. It has a hole b2.

  The moving amount of the key member a3 is a fixed slide length i1 from the upper end to the lower end of the slide hole b2, and the moving slide length i1 is determined by the hitting bar a1 being an anchor nut d1. The wedge body d5 inserted therein is pressed, and as shown in FIG. 2, the wedge body d5 expands the split cylinder portion d4 of the anchor nut d1 and fixes it to the wall lower hole f3. It is substantially the same length as the moving length h1 of the wedge body d5.

  Thus, the hitting bar a1 is united with the hitting bar insertion guide pin b1 via the key member a3 and rotates together around the axis, and can be quantitatively moved in the axial direction independently.

  Further, as shown in FIG. 1, the hitting rod insertion guide pin b1 has an anchor nut screwing shaft portion b7 having a diameter smaller than that of the male screw b3 on the outer peripheral surface of the hitting rod insertion guide pin on the same axis. A step b5 is formed at the upper end of the anchor nut screwing shaft portion b7. Further, the hitting bar a1 passes through the anchor nut screwing shaft portion b7.

  In addition, a rotary operation head part a4 coupled to the chuck w2 of the electric hammer drill w1 is provided at the upper end of the hitting bar.

  The hitting bar insertion guide pin b1 has a male screw b3 formed on the outer peripheral surface, and the internal thread of the female screw hole c2 is inserted into the female screw hole c2 of the seat c1 while the female screw hole c2 is inserted into the female screw hole c2. Then, the male screw b3 on the outer peripheral surface of the guide pin b1 is screwed, and the vertical position of the seat c1 is adjusted by progressively or progressively retreating. The anchor nut d1 is screwed to the lower end male screw b6 of the hitting bar insertion guide pin b1 and is suspended on the coaxial line.

  First, when an attachment object e1 having a prepared hole e2 shown in FIG. 2 is already placed on the surface f2 of the wall, a cutting drill or the like is passed through the prepared hole e2 and the wall f1 is longer than the length of the anchor nut d1. The pilot hole f3 is dug sufficiently deeply, and the shavings remaining in the wall pilot hole f3 are removed as necessary.

  Next, as shown in FIG. 3, the rotary operation head part a4 at the upper end of the hitting bar a1 of the anchor nut fixing tool is chucked with an electric hammer drill w1 that is switched in three stages of a vibration drive mode, a forward rotation drive mode, and a reverse rotation drive mode. Install this tool in preparation for w2.

  Next, as shown in FIGS. 1 and 2, the distance g1 between the step b5 of the hitting bar insertion guide pin b1 and the seat surface c3 of the seat c1 screwed into the outer periphery of the hitting bar insertion guide pin b1 is shown in FIG. The adjustment is set by the screwing amount of the seat c1 according to the thickness e4 of the attachment object e1 shown.

  Next, the electric hammer drill w1 is set in the forward rotation driving mode in one hand, the anchor nut d1 is held in the other hand with a pliers or the like, and the female screw d2 is held upward. The electric hammer drill w1 is operated while the male screw b6 at the lower end of the tapping rod insertion guide pin b1 is applied to the same axis on the female screw d2, and is screwed and coupled until the end surface d3 of the anchor nut cylinder part comes into contact with the step part b5. To do.

  Next, as shown in FIG. 2, the anchor nut d1 is inserted into a wall lower hole f3 that communicates concentrically with the pilot hole e2 of the object to be attached e1, and the seating surface c3 of the tool is set to the pilot hole opening surface e3. Sit down.

  Then, the mode of the electric hammer drill w1 is switched to the vibration drive mode, and the electric hammer drill w1 is set until the key member a3 of the hitting bar a1 reaches the lower end of the slide hole b2 of the hitting bar insertion guide pin b1. Press down and operate.

  Thus, as shown in FIG. 2, the wedge body d5 in the anchor nut d1 is pushed in by the hitting bar a1, and the wedge body d5 expands the split cylinder part d4 of the anchor nut d1, and the pilot hole in the wall f1. The split cylinder part d4 bites and fixes to the inner wall of f3.

  Next, after confirming that the key member a3 has reached the lower end of the slide hole b2, by operating the electric hammer drill w1 by switching the mode to the reverse rotation drive mode, the striker a1 and the striker insertion guide pin b1 rotates together in the reverse rotation direction, and the anchor nut screwing shaft portion b7 and the anchor nut d1 of the hitting rod insertion guide pin b1 are released from the coupling.

  Thus, as shown in FIG. 4, the anchor nut end surface d3 and the wall surface f2 are flush with each other, and the anchor e1 is fixed in a state where the attachment object e1 is placed on the wall f1.

  The seat may be fixed so that the seat cannot be moved with respect to the hitting rod insertion guide pin.

  Further, other than the above-described electric hammer drill, other rotary operation tools and hitting operation tools can be used. In this case, the rotary operation head portion can be formed into a square shape to lock the tool.

  The present invention can provide a function for setting the lower limit of movement of the hitting stick by hitting the key member against the lower end of the slide hole during the hitting operation while giving the key member a movement guide function in the axial direction of the hitting stick. .

  Further, as shown in FIG. 5, when carrying, the carrying hanger a5 formed on the key member and the belt of the operator can be tied with a string to prevent the tool from dropping.

The front sectional view in the state where the anchor nut was combined with the anchor nut fixing tool of the present invention. The front 1 part sectional view of the state which expanded the split cylinder part of the anchor nut couple | bonded with the anchor nut fixing tool by pushing down a hammer drill, and is fixing to the prepared hole of a wall. The side view which shows the state which couple | bonded the anchor nut with the anchor nut fixing tool with which the hammer drill was mounted | worn. Sectional drawing which shows the state which decoupled the anchor nut fixing tool from the anchor nut, and removed. Sectional drawing of the anchor nut fixing tool using the key member which formed the hanging tool for carrying.

Explanation of symbols

a1-striking bar a2-guide hole a3-key member a4-rotating operation head part a5-carrying lifting tool b1-striking bar insertion guide pin b2-slide hole b3-male screw forming part b4-through hole b5-step part b6-male screw b7-anchor nut screwing shaft portion c1-seat c2-female screw hole c3-seat surface d1-anchor nut d2-female screw d3-cylinder end surface d4-split tube portion d5-wedge body e1 -Attachment object e2-Preparation object pilot hole e3-Attachment object surface f1-Wall f2-Wall surface f3-Wall preparation hole g1-Length between end face of cylindrical portion of anchor nut and seating surface h1-Wedge travel length i1-Slide length w1-Electric hammer drill w2-Chuck

Claims (1)

  There is a seat on the outer peripheral surface of the hitting rod insertion guide pin having a hitting hole for the hitting rod, and a female screw cylinder at the upper end of the anchor nut is screwed and connected to the outer peripheral surface of the male screw provided at the lower end of the hitting rod insertion guide pin. Then, the anchor nut is inserted into the pilot hole in the coupled state, the insertion depth of the anchor nut is set by seating the seat on the pilot hole opening surface by the insertion, and the hitting stick inserted through the insertion hole. In the fixed tool that pushes the wedge body that fits into the anchor nut by pressing and expands the split tube portion of the anchor nut and bites and fixes it to the inner wall surface of the hole in the wall, The rod insertion guide pin is engaged with each other through a key member that rotates around the axis and allows the single movement of the hitting rod in the axial direction. Stick insertion guide pin and key member The anchor nut is screwed and coupled together, and the hitting bar is pushed in by pushing the upper end of the hitting bar to move the hitting bar under the guidance of the key member to push in the wedge body. Anchor nut fixing tool.

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