JP6501393B2 - Anchor press-in tool - Google Patents

Description

  An L-shaped anchor consisting of a press-in part, an R-folded part and an exposed part mainly made by bending metal bars such as rebar approximately 90 degrees is perforated in a concrete body or rock wall and filled with adhesive beforehand The present invention relates to an anchor press-in tool used for press-fitting in a pilot hole.

  In the construction where the new concrete is applied on the surface of the concrete such as the concrete surface inside the tunnel such as roads and railways and the rock wall of the road and reinforced with the wall surface, the applied concrete is firmly integrated on the surface of the existing structure. It is important to stick. Therefore, there is a reinforcement method in which concrete is applied not only by applying concrete on the surface but also by press-fixing the L-shaped anchor to the existing frame before application.

  The L-shaped anchor used is produced by bending a steel bar such as a reinforcing bar with a diameter of about 12 to about 32 mm by about 90 degrees. The lower holes pre-drilled in the existing frame, such as concrete and rock walls, into which the anchor is pressed, are drilled with a drill about 6 to 12 mm larger than the diameter of the anchor steel bar, and resin and other materials are filled with filling equipment before the anchor is pressed. Generally, a method is employed in which the press-in anchor is firmly bonded to the casing with an adhesive by filling the adhesive or inserting a capsule containing the adhesive.

  The L-shaped anchor 1 is shown in FIG. The press-in portion 2 and the R-bent portion 4 and the exposed portion 3 have a length of about 200 to 400 mm, and the radius of curvature of the R-bent portion 4 is about 2 to 4 times the diameter of the steel bar The exposed portion 3 following the R-bent portion 4 is about 50 to 150 mm shorter than the press-in portion 2, and the angle formed by the press-in portion 2 and the exposed portion 3 is generally 90 degrees. As shown in FIG. 16, the actual L-shaped anchor 1 has irregularities on the surface, and it is often devised that the adhesive force of the adhesive effectively acts to facilitate integral fixing with the housing 7. As shown in FIG. 2, this is press-fitted into the lower hole 8 previously drilled in a frame 7 such as concrete or rock.

  Since the diameter of the pilot hole 8 is larger than the diameter of the steel bar of the L-shaped anchor 1, it seems that the operator has already pressed the L-shaped anchor while holding it by hand to insert the L-shaped anchor 1 into the pilot hole 8 However, due to the resistance of the pre-filled adhesive and sometimes small fragments generated by chipping of the inner surface of the lower hole at the time of insertion, it is often difficult to push by hand. In this case, a hammer is used to strike the exposed portion 3 and the R-bent portion 4, but as can be understood from the shape of the L-shaped anchor 1, the R-bent portion 4 is impacted in the press-fitting direction or the exposed portion 3 is Even if the hammer is hit in the press-in direction, the striking force does not work effectively in the press-in direction, and the L-shaped anchor 1 is made of a round bar so that the hammer slips on the steel bar and can not be hit well There is also a problem, and the work efficiency of the press-fit can not be improved unless skilled.

  After press-fitting the L-shaped anchor 1 into the lower hole 8 of the existing housing 7, the reinforcing concrete 9 is applied to the surface of the housing 7 as shown in FIG. The coating thickness is about 50 to 300 mm. When the L-shaped anchor 1 is driven into the housing 7 and then the reinforced concrete 9 is applied, the risk of the reinforced concrete 9 peeling from the housing is greatly reduced as compared with the case without the L-shaped anchor 1.

  As described above, if the L-shaped anchor is pressed into the lower hole drilled in an existing frame such as concrete or rock, the reinforcing effect can be enhanced by applying reinforcing concrete. However, the work of press-fitting the L-shaped anchor is often in a place where working environment is bad such as high place. In addition, since it is necessary for the operator to hit the exposed portion or R-bent portion of the L-shaped anchor made of the round bar with a hammer or the like, it is difficult to effectively hit in the press-in direction The work efficiency is poor because the hammer is easy to slip on the round bar and it is necessary to hit the hammer while the work posture can not be taken at a high position, etc., and there are many problems from the viewpoint of safety work .

The present invention for solving the above problems is a grip portion for gripping an exposed portion of an L-shaped anchor, and an anchor press-in tool having a striking rod at a position closer to the press-fit portion than the grip portion. In order to press-fit an L-shaped anchor using this tool, the striking rod is attached to a striking vibration tool such as a power tool to utilize the striking force of the striking vibration tool.

  When the anchor press-in tool according to the present invention is mounted on an impact vibration tool such as a power tool and used, the impact force of the impact vibration tool effectively acts because the impact position is close to the press-fit portion of the L-shaped anchor. The press-in can be performed in a significantly shorter time than the manual press-in. Therefore, the work efficiency is greatly improved, and even non-skilled workers can work because they do not require skills. Furthermore, in the case of press-fitting into a wall of a high place or the like, safety is also enhanced because it is not necessary to work in an unreasonable posture for a long time.

Front view of L-shaped anchor The figure which shows the state which pressed in the L-shaped anchor in the lower hole of the existing frame. The figure which illustrates the state where reinforcement concrete was applied to the surface of the housing where the L-shaped anchor was pressed. Front view of the first embodiment of the anchor press-in tool of the present invention Front view of press-fit tool body in a second embodiment similar to the first embodiment of FIG. 4 Front view of a striking rod used in combination with the press-fit tool body of FIG. 5 The figure which shows the state which attached the anchor press-fitting tool of this invention shown by FIG. 4 to L-shaped anchor. The figure which shows the state which attached the anchor press-fit tool after mounting the L-shaped anchor shown by FIG. 7 to an electric tool. Image showing the state where the L-shaped anchor has been pressed into the existing housing using an electric tool Figure showing the L-shaped anchor completely pressed into the existing housing Front view of the third embodiment of the anchor press-in tool of the present invention Top view of the anchor press-in tool of FIG. 11 The figure which demonstrates the state which attached the L-shaped anchor to the anchor press-fit tool of FIG. Front view of the fourth embodiment of the anchor press-in tool of the present invention Top view of the anchor press-in tool of FIG. 14 The figure which explains the state of the steel bar surface of L shaped anchor

  The anchor press-fitting tool according to the present invention comprises a press-fit tool main body having an anchor grip portion and a striking rod provided at a position closer to the press-fit side than the grip portion. When press-fitting using this anchor press-in tool, attach the press-in tool main body to the L-shaped anchor and attach the impact bar attached to the press-in tool to an impact vibration tool such as a power tool. The press-in end of the anchor is inserted into the lower hole drilled in the existing housing to operate the impact vibration tool, and the impact force of the impact vibration tool is used to press-fit the press-in portion of the L-shaped anchor into the lower hole of the housing.

  The diameter of the pilot hole is about 6 to 12 mm larger than the diameter of the steel bar of the L-shaped anchor, and the position of the striking rod is close to the central axis of the press-fit portion of the L-shaped anchor, so the viscosity of the adhesive previously filled in the pilot hole. Even with resistance, the impact force of the impact vibration tool works effectively, and it is possible to press the L-shaped anchor into the lower hole in a short time.

An embodiment of an anchor press-in tool according to the present invention will be described with reference to the drawings.
FIG. 4 shows a front view of the first embodiment. The anchor press-fit tool 10 is composed of a press-fit tool body 11 and a striking rod 12. The press-fit tool main body 11 is provided with a grip 19 having an anchor grip hole 13 for gripping the exposed portion 3 of the L-shaped anchor 1. On the other hand, the striking rod 12 is fixed to the anchor press-fit side than the grip portion 19 by a method such as screwing.

  When press-fitting the L-shaped anchor 1 shown in FIGS. 1 and 16 with the anchor press-in tool 10 into the pre-hole 8 filled in advance with the adhesive filled in the existing concrete or rock body, first, The state shown in FIG. 7 by inserting the exposed side end 6 of the exposed portion 3 of the L-shaped anchor 1 into the anchor grip hole 13 and pushing it until the R bent portion 4 of the anchor abuts on the grip 19 of the press-fit tool main body 11 Make it

  Next, after the striking rod 12 is attached to the mounting portion 20 of the power tool 14 and in the state of FIG. 8, the operator holds the power tool firmly with one hand, for example, the right hand, and the other hand, for example, the left hand The anchor press-in tool 10 and the L-shaped anchor 1 are supported, and the press-in side tip 5 of the anchor is slightly pushed into the lower hole 8 drilled in the existing housing 7, and the press-in side tip 5 is inserted several cm or more When the state is reached, the electric power tool 14 is pushed by the electric power tool 14 in the press-in direction while performing the striking operation.

  Then, the striking force generated by the power tool 14 is propagated to the L-shaped anchor 1 via the striking rod 12, but the position of the striking rod 12 is press-fit of the L-shaped anchor 1 from the grip portion 19 of the press-fit tool body 11. Since it is close to the part 2, the striking force of the electric and power tool 14 acts on the press-fitting part 2 linearly, and it is possible to press-fit efficiently in a short time with a small striking force.

  When the press-fit progresses and the L-shaped anchor 1 shown in FIG. 9 is in a sufficiently press-fitted state, the anchor press-in tool 10 is pulled out from the exposed part 3 of the anchor together with the power tool 14 as shown in FIG. Then, only the R bent portion 4 and the exposed portion 3 of the L-shaped anchor 1 are exposed on the surface of the housing 7, and the press-fitting operation is completed. After that, as shown in FIG. 3, reinforced concrete may be applied to the casing and wait for it to dry and harden.

  In the anchor press-fit tool 10 shown in FIG. 4, the striking rod 12 is integrally fixed to the press-fit tool main body 11 with a screw or the like, but there is also a method of using this as separated parts and combining them at press-fit. In the case of the second embodiment, a striking rod 12 having a guide shaft 18 shown in FIG. 6 and a press-fit tool body 11 having a striking rod mounting hole 17 shown in FIG. 5 are used in combination. The diameter of the guide shaft 18 is about 1 mm smaller than the diameter of the striking rod mounting hole 17 and can be easily attached and detached.

  When using the press-fit tool of the second embodiment, the striking rod 12 of FIG. 6 is attached and fixed to the mounting portion 20 of the electric power tool 14 in advance. Next, the press-fit tool body 11 of FIG. 5 is inserted into the exposed portion 3 of the L-shaped anchor 1 and combined with the striking bar 12 previously mounted on the power tool 14. After that, the press-fit of the first embodiment shown in FIG. 4 in which the strike-bar 12 and the press-fit tool body 11 are integrated by a screw or the like while securing the state where the striking rod 12 and the press-fit tool body 11 are combined. Operate in the same manner as the tool and press the L-shaped anchor into the housing.

At this time, the striking rod and the press-fit tool main body are always easily separated during the work, but in the press-fit work, the worker always pressurizes the L-shaped anchor with the power tool, There is no separation of the striking bar and the press-fit tool body during operation.
When the press-in is completed, when the power tool 14 is pulled, the striking rod 12 is also disengaged from the press-fitting tool together with the power tool 14 and the press-fit tool body 11 of FIG. Only will remain. When this is pulled out from the exposed portion, the press-fitting operation is completed.

  In the press-fit tool of the above method, even if the press-fit tool 11 is attached to the exposed portion 3 of the L-shaped anchor 1, the force-fit tool is immediately detached from the exposed portion when a force such as gravity acts in the opposite direction to the attachment. You need to be careful not to leave during work. As a plan to solve this detachment problem, as shown in the front view of FIG. 11, it is also possible to use the anchor press-fit tool 10 of the third embodiment in which the R-portion restraining claw 15 is provided on the press-fit tool main body 11. A top view of this tool is shown in FIG.

  A state in which the L-shaped anchor 1 is attached to the press-fitting tool 10 is shown in FIG. As can be seen from the figure, when the L-shaped anchor 1 is attached, the R-shaped bent portion 4 is restricted in movement by the R-portion restraining claw 15, so the L-shaped anchor 1 does not easily come off the anchor press-fit tool 10. When mounting the L-shaped anchor to this press-in tool, the anchor 1 or the anchor press-in tool 10 is rotated by 90 degrees around the axis of the exposed portion 3 of the anchor 1 than in the state of FIG. After putting on 19 you can go back 90 degrees.

  In the anchor driving tool according to the present invention as described above, the exposed portion 3 of the L-shaped anchor 1 is inserted into the anchor grip hole 13 and then the press-fitting operation is performed, and the operation is completed along the axis of the exposed portion 3 Although it is a drawing out method, as a plan which can install and detach an anchor press-in tool easily, one in which the anchor mounting U-shaped groove 16 is processed as in the front view of FIG. 14 and the fourth embodiment shown in the top view of FIG. It is applicable. In this case, the press-fit tool 10 can be mounted from the lateral direction to the R-bent portion 4 of the L-shaped anchor 1 and the mounting work is simplified, but it is easy to be detached due to the vibration of the press-fitting work. is necessary.

DESCRIPTION OF SYMBOLS 1 L-shaped anchor 2 Press-fit part 3 R-bending part 5 Press-fit side tip 6 Exposed side tip 7 Rod body 8 Under hole 9 Reinforcement concrete 10 Anchor press-fit tool 11 Press-fit tool main body 12 Strike bar 13 Anchor grip hole 14 Electric tool 15 R portion restraining claw 16 anchor mounting U-shaped groove 17 striking bar mounting hole 18 guide shaft 19 grip portion 20 mounting portion

Claims (3)

The metal rod such as rebar was manufactured by bending schematic 90 degrees, the L-shaped anchor consisting of the exposed portion and the press-fitting portion and the R bent portion is drilled to a precursor such as concrete or rock walls, in advance adhesive is filled An anchor press-in tool used for press-fitting in a pilot hole,
A striking rod that can be attached to an electric tool that generates striking force;
And a press-fit tool body having a grip portion for gripping an exposed portion of the L-shaped anchor and a striking rod attachment hole for attaching the striking rod.
The striking bar is positioned closer to the press-fit portion than the grasping portion in a state in which the grasping portion grasps the exposed portion and the striking bar is attached to the striking bar attachment hole,
The rear end portion of the striking rod can be attached to the electric tool in the press-fitting direction of the press-fitting portion in a state where the grip portion grips the exposed portion, and the striking-rod mounting hole is the striking rod. By positioning so as to extend in the press-fit direction behind the press-fit portion in the press-fit direction, a striking force received from the electric tool causes the L-shaped anchor to be press-fit in the press-fit direction via the striking rod. Propagate to the L-shaped anchor,
Anchor press-in tool characterized in that. The anchor press-in tool according to claim 1, wherein the striking bar movably locks the striking bar attachment hole such that only the striking force which the striking bar receives from the electric power tool is transmitted to the L-shaped anchor. The L-shaped anchor is moved from the tip end position of the press-fit portion to the press-fit portion by positioning the grip portion behind the rear end of the press-fit portion in the press-fit direction while gripping the exposed portion. The anchor press-fit tool according to claim 1 or 2, which can be press-fitted to any depth up to a position where the R-bent portion is connected.

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