Anchor Driving Jig

Abstract

To provide an anchor driving tool for stably driving an anchor to an appropriate depth. SOLUTION: An anchor driving jig 10 for driving an internal cone driving type anchor with a driving length of T1 into a core hole T2 deeper than T1 has a hollow bolt 101 with a central axis length of T2-T1 or more, in which a driving rod 103 for pressing the internal cone of the anchor is slidably housed in the hollow portion. A screw 104 that is screwed into the anchor is threaded on the outer periphery of one end of the hollow bolt 101. A flange 102 with an outer diameter larger than the outer diameter of the core hole is provided on the other end of the hollow bolt 101.

Description

[Technical field]

[0001] The present invention relates to an anchor driving jig that is detachably mounted on an anchor driving machine, such as a portable hydraulic processing machine that moves a piston by supplying pressurized oil. [Background technology]

[0002] Anchors are embedded in the concrete surface with a portion of them protruding, and structures are fixed in place using the embedded anchors. This type of anchor is primarily made of metal, and is also called an anchor bolt because a screw is provided at the protruding end.

[0003] An internal cone driving type anchor consists of a hollow body with a central hole, the end to be buried (buried end) is an expanded diameter part with a slit, and an internal cone is inserted into the central hole. The anchor is inserted from the buried end into a hole drilled in the concrete surface, and by moving the internal cone to expand the expanded diameter part, a frictional force is secured between the anchor and the wall surface of the hole, and the anchor is fixed so that it cannot be pulled out. Regarding this type of technology, Patent Document 1 discloses an anchor positioning tool that ensures uniform driving of the anchor. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Utility Model Registration No. 3148394 Summary of the Invention [Problem to be solved by the invention]

[0005] When an exterior covering such as mortar or tiles is attached to a concrete surface, the anchor positioning jig disclosed in Patent Document 1, for example, may not drive the anchor into the concrete to a sufficient depth. This is because the length of the anchor driven into the concrete (driving length) is shorter by the thickness of the exterior covering than when the anchor is driven directly into the concrete. If the anchor is driven shallowly into the concrete, the expanded diameter portion does not expand sufficiently, and the necessary frictional force cannot be secured between the expanded diameter portion and the wall surface of the drilled hole. For this reason, a jig is needed to stably drive the anchor into the appropriate depth. [Means for solving the problem]

[0006] The anchor driving jig of the present invention is a jig for driving an internal cone driving-type anchor with a driving length of T1 into a core hole of T2 that is deeper than T1, and has a hollow bolt with a central axis length of T2 - T1 or more, in which a driving rod for pressing the internal cone of the anchor is slidably housed in a hollow portion, one end of the hollow bolt has a threaded outer periphery on which a screw is screwed into the anchor, and the other end of the hollow bolt is provided with a flange with an outer diameter larger than the outer diameter of the core hole. Effect of the Invention

[0007] According to the present invention, it is possible to stably drive an anchor to an appropriate depth. [Brief description of the drawings]

[0008] [Figure 1] 14(a) to 14(c) are diagrams showing the structure of an anchor driving jig. [Diagram 2] (a) and (b) are schematic diagrams of the anchor driving jig with the driving rod inserted. [Diagram 3] (a) and (b) are diagrams of the anchor structure. [Figure 4] 1(a) and (b) are schematic diagrams of an anchor with its expansion section expanded. [Diagram 5] 1(a) and (b) are explanatory diagrams showing the anchor attached to the anchor driving jig. [Figure 6] (a) and (b) are explanatory diagrams showing the anchor attached to the anchor driving jig and the driving rod being driven into the anchor. [Figure 7] (a) and (b) are diagrams explaining how to embed an anchor in concrete. [Figure 8] (a) and (b) are explanatory diagrams of the anchor after it has been cast (driven) into concrete. [Figure 9] (a) and (b) are diagrams illustrating how anchors are embedded in concrete when the exterior thickness is different. [Figure 10] An explanatory diagram of an anchor driving jig with a variable length hollow bolt. [Figure 11] (a) and (b) are diagrams illustrating the structure of an anchor driving jig in which the hollow bolt is composed of multiple hollow members. [Figure 12] An explanatory diagram of a driving rod. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Fig. 1 is a diagram showing the configuration of an anchor driving jig of this embodiment. Fig. 1(a) is an external view of an anchor driving jig 10, and Fig. 1(b) is a BB cross-sectional view of the anchor driving jig 10. The anchor driving jig 10 is equipped with a hollow bolt 101 having a central hole (hollow portion). A driving rod 103 for pressing an internal cone of the anchor, which will be described later, is slidably housed in the hollow portion of the hollow bolt 101. The hollow bolt 101 has a screw 104 on the outer periphery of one end into which an anchor is screwed, and a flange 102 is provided on the other end.

[0010] In this example, the driving rod 103 is composed of a stud rod 103a and a flat head rod 103b. The tip of the stud rod 103a presses the internal cone of the anchor. The tip of the flat head rod 103b contacts the stud rod 103a, and the striking surface at the base end protrudes from the flange 102. The flat head rod 103b presses the stud rod 103a, causing the stud rod 103a to press the internal cone.

[0011] The stoppers 105 are provided near the base end of the stud rod 103a and near the tip of the flat head rod 103b. The stoppers 105 regulate the amount of driving by the driving rod 103 and prevent the driving rod 103 (stud rod 103a and flat head rod 103b) from slipping out of the hollow portion. The stoppers 105 are made of hard ring-shaped bodies fitted into recesses formed near the base end of the stud rod 103a and near the tip of the flat head rod 103b.

[0012] The hollow bolt 101 has a hollow portion formed by a first hollow portion 106a and a second hollow portion 106b. The first hollow portion 106a slidably accommodates the stud rod 103a. The second hollow portion 106b has an inner diameter larger than that of the first hollow portion 106a. The second hollow portion 106b slidably accommodates the contact portion between the stud rod 103a and the flat head rod 103a. The second hollow portion 106b limits the range in which the stopper 105 can move to between the flange 102 and the first hollow portion 106a. Therefore, the driving rod 103 is limited to move only by the length of the second hollow portion 106b at a maximum, and the driving amount is regulated. In addition, the hollow bolt 101 has a plurality of marks 107 formed of grooves or the like formed on the outer periphery at equal intervals in the length direction. In this example, the interval d between the marks 107 is 1 cm, but this value can be changed as appropriate.

[0013] 1(c) is a view of the anchor driving jig 10 viewed from the flange 102 side. The flange 102 is provided with a hole 108 that communicates with the hollow part of the hollow bolt 101. The flange 102 is also formed with a nut part 102a for use with a tool such as a wrench when screwing the anchor into and out of the thread 104 of the hollow bolt 101.

[0014] The anchor driving jig 10 in Fig. 1 shows a state in which the driving rod 103 has not been driven in and the base end (striking surface) of the flat head rod 103b protrudes from the flange 102. Fig. 2 is a configuration diagram of the anchor driving jig 10 with the driving rod 103 driven in. Fig. 2(a) is an external view of the anchor driving jig 10. Fig. 2(b) is a B-B cross-sectional view of the anchor driving jig 10.

[0015] As the driving bar 103 is driven in the direction of the arrow, the striking surface of the flat head bar 103b is embedded in a hole 108 provided in the flange 102. As the flat head bar 103b is embedded in the hole 108, the striking surface of the flat head bar 103b becomes substantially flush with the surface of the flange 102. As the flat head bar 103b is driven in, the stud bar 103a is pressed against the flat head bar 103b. This causes the stud bar 103a to be pushed out a predetermined length from the tip of the hollow bolt 101. As the stopper 105 collides with the step between the second hollow portion 106b and the first hollow portion 106a, further movement of the stud bar 103a is restricted.

[0016] Fig. 3 is a diagram showing the structure of an anchor. Fig. 3(a) is an external view of the anchor 20. Fig. 3(b) is an AA cross-sectional view of the anchor 20. The anchor 20 of this embodiment is of an internal cone driving type. In the anchor 20, one end side of the anchor body 201 is an expanded diameter portion 202 having a slit 203. The anchor body 201 is a hollow body with a central hole, and an internal cone 204 is inserted into the central hole. A screw 205 is threaded on the other end side of the anchor body 201 where the slit 203 is not provided.

[0017] The anchor 20 in Fig. 3 shows a state in which the expanded diameter portion 202 is not expanded. The configuration of the anchor 20 in a state in which the expanded diameter portion 202 is expanded is shown in Fig. 4. Fig. 4(a) is an external view of the anchor 20 in a state in which the expanded diameter portion 202 is expanded, and Fig. 4(b) is a cross-sectional view of the anchor 20 taken along line AA. The internal cone 204 is pressed by the anchor driving jig 10 and moves in the direction of the arrow, whereby the slit 203 of the expanded diameter portion 202 is forced and expanded by the internal cone 204. With the slit 203 forced and expanded by the internal cone 204, the expanded diameter portion 202 is brought into a state where it is radially expanded in the radial direction.

[0018] Figures 5 and 6 are explanatory diagrams of the state in which the anchor 20 is attached to the anchor driving jig 10. Figure 5 shows the state before the driving rod 103 is driven (the state before the anchor 20 is driven), and Figure 6 shows the state after the driving rod 103 has been driven (the state after the anchor 20 has been driven). Figures 5(a) and 6(a) are external views of the state in which the anchor 20 is attached to the anchor driving jig 10. Figures 5(b) and 6(b) are cross-sectional views taken along line AA.

[0019] The anchor 20 is attached to the anchor driving jig 10 by screwing the thread 205 of the anchor 20 into the thread 104 of the hollow bolt 101. As a result, the tip of the driving rod 103 (stud rod 103a) of the anchor driving jig 10 abuts against the internal cone 204 of the anchor 20. One of the thread 104 of the hollow bolt 101 and the thread 205 of the anchor 20 may be a male thread and the other a female thread. In this embodiment, the thread 104 of the hollow bolt 101 is a male thread and the thread 205 of the anchor 20 is a female thread.

[0020] As the driving rod 103 is driven in, the stud rod 103a presses the internal cone 204 of the anchor 20. This pushes the internal cone 204 toward the enlarged diameter portion 202, expanding the slit 203 of the enlarged diameter portion 202. As described above, the movement range of the driving rod 103 is limited by the stopper 105, so that the internal cone 204 is prevented from jumping out of the anchor 20.

[0021] (Example of use) Next, an example of using the anchor driving jig 10 of this embodiment will be described. Figures 7 and 8 are explanatory diagrams of how the anchor 20 is embedded in concrete using such an anchor driving jig 10, with Figure 7(a) being a cross-sectional perspective view before the anchor is driven, and Figure 7(b) being a cross-sectional view before the anchor is driven. Figure 8(a) being a cross-sectional perspective view after the anchor has been driven, and Figure 8(b) being a cross-sectional view after the anchor has been driven. The anchor 20 is embedded in a hole (core hole 43) drilled in concrete 40. The anchor 20 is inserted into the core hole 43 and the expanded diameter portion 202 is expanded, so that the anchor 20 is fixed in place by the frictional force between the wall surface of the core hole 43 and the expanded diameter portion 202.

[0022] When the anchor 20 is embedded directly into the concrete 40 where the concrete surface is exposed, even a conventional anchor driving jig can embed the anchor 20 to a sufficient depth. However, as shown in Figures 7 and 8, when the concrete surface is not exposed and a member softer than the concrete 40 is provided as the exterior of the concrete surface, the conventional anchor driving jig cannot embed the anchor 20 to a sufficient depth into the concrete 40.

[0023] 7 and 8, an exterior covering (mortar 41 and tiles 42) is provided on a concrete surface. The driving length T1 of the anchor driving jig 10 is equal to the length of the anchor 20, but the core hole 43 is drilled to a depth T2 that is deeper than the driving length T1 by the thickness of the mortar 41 and the tile 42.

[0024] The anchor driving jig 10 includes a hollow bolt 101, so that the depth to which the anchor 20 is embedded can be adjusted. The mark 107 on the hollow bolt 101 makes it possible to determine the length to which the hollow bolt 101 has been inserted into the core hole 43. In the example of Fig. 7 and Fig. 8, the hollow bolt 101 is inserted into the core hole 43 to the third mark 107 from the tip.

[0025] When driving the anchor 20, the core hole 43 is drilled in advance. When drilling the core hole 43, the worker determines the depth T2 in advance and drills the core hole 43 using a tool such as a drill. The depth T2 is determined by the sum of the thickness of the mortar 41 and the tile 42 and the driving length T1. The worker inserts the anchor 20 attached to the anchor driving jig 10 into the core hole 43 while checking the mark 107 of the hollow bolt 101 according to the depth T2 of the core hole 43. The outer diameter of the flange 102 is configured to be larger than the outer diameter of the core hole 43, preventing the entire anchor driving jig 10 from being inserted into the core hole 43.

[0026] Thereafter, the anchor driving machine 30 is attached to the anchor driving jig 10. The anchor driving machine 30 is a portable hydraulic processing machine that moves a piston by supplying, for example, pressurized oil. The anchor driving machine 30 of this embodiment includes a housing 31, a cylinder 32, a pump case 33, and a piston 34.

[0027] The housing 31 accommodates the flange 102, thereby mounting the anchor driving jig 10. The cylinder 32 has a piston 34 provided therein, and a space for accommodating the driving rod 103 is provided on the housing 31 side. Pressurized oil is stored in the pump case 33, and when an operation button (not shown) is pressed, the pressurized oil moves the piston 34 in the direction of the driving rod 103.

[0028] As the piston 34 moves, it presses the striking surface of the driving bar 103. This causes the driving bar 103 to move, which in turn moves the internal cone 204 of the anchor 20, expanding the enlarged diameter portion 202. Since the enlarged diameter portion 202 of the anchor 20 comes into contact with the concrete 40 without coming into contact with the mortar 41 and the tile 42, which are softer than the concrete 40, it is possible to ensure the necessary frictional force between the enlarged diameter portion 202 and the wall surface of the core hole 43. Therefore, the anchor 20 is embedded in the concrete 40 so that it cannot be pulled out.

[0029] After the anchor 20 is embedded, the anchor driving machine 30 is removed from the anchor driving jig 10, and further the anchor driving jig 10 is removed from the anchor 20. At that time, if the anchor 20 is firmly fastened to the anchor driving jig 10, the worker can easily remove the anchor driving jig 10 from the anchor 20 by operating the nut portion 102a formed on the flange 102 with a tool such as a wrench.

[0030] Fig. 9 is an explanatory diagram of a state in which an anchor 20 is embedded in concrete 40 when the thicknesses of the exterior are different. In Fig. 9(a), the mortar 41 is 20 [mm] thick, the tile 42 is 10 [mm] thick, and the overall exterior is 30 [mm] thick. In Fig. 9(b), the mortar 41 is 40 [mm] thick, the tile 42 is 10 [mm] thick, and the overall exterior is 50 [mm] thick.

[0031] Since the thickness of the exterior is different, the length of the hollow bolt 101 of the anchor driving jig 10 inserted into the core hole 43 is different. In FIG. 9(a), the hollow bolt 101 is inserted into the core hole 43 up to the third mark 107 from the tip. In FIG. 9(b), the entire hollow bolt 101 (the length from the tip to the fifth mark 107) is inserted into the core hole 43. By visually checking the mark 107 in this way, it becomes easy to insert the anchor 20 to an appropriate position (depth) in the core hole 43. The central axis length of the hollow bolt 101 is expressed as (T3-T1). Since T3>T2, the central axis length of the hollow bolt 101 is equal to or greater than the difference between the depth T2 and the driving length T1 (T2-T1 or greater).

[0032] In this way, the anchor driving jig 10 of this embodiment has the hollow bolt 101, and thus can drive the anchor 20 into the core hole 43 at depths T2 and T3 deeper than the driving length T1. In addition, since the hollow bolt 101 is provided with a plurality of marks 107, the depth (position) at which the anchor 20 is embedded can be appropriately adjusted.

[0033] (Variation 1) The anchor driving jig 10 may be configured so that the length (center axis length) of the hollow bolt 101 is variable, thereby making it possible to adjust the length corresponding to the depth of the core hole 43. In this case, for example, the hollow bolt 101 and the flange 102 are configured to be separable. The hollow bolt 101 is prepared in a number of different lengths, and one is selected according to the depth of the core hole 43 and attached to the flange 102.

[0034] 10 is an explanatory diagram of an anchor driving jig 10a in which the length of the hollow bolt is variable. For example, a hollow bolt 501 and a flange 502 are screwed together. The tightening torque between the hollow bolt 501 and the flange 502 is set to be greater than the tightening torque between the hollow bolt 501 and the anchor 20. Alternatively, the tightening direction between the hollow bolt 501 and the flange 502 and the tightening direction between the hollow bolt 501 and the anchor 20 are opposite to each other. By screwing together in this manner, when removing the anchor 20 from the anchor driving jig 10a, it is possible to prevent the flange 502 from being removed from the hollow bolt 501 before the anchor 20 is removed.

[0035] The driving rods 503 are also prepared in a number of different lengths according to the length of the hollow bolt 501, and are inserted into the hollow portion of the hollow bolt 501 of the corresponding length. The driving rods 503 may be prepared in a number of different lengths, both the stud rod 503a and the flat head rod 503b, or one of the lengths may be fixed and the other prepared in a number of different lengths. For example, the length of the flat head rod 503b is fixed, and the stud rod 503a is prepared in a number of different lengths.

[0036] The hollow bolt 501 is provided at a position where the second hollow portion 506b contacts the flange 502. The amount of movement of the driving rod 503 required for expanding the enlarged diameter portion 202 by the internal cone 204 is the same as in the case of FIG. 1, and the length of the second hollow portion 506b is approximately the same as the length of the second hollow portion 106b described in FIG. The length of the flat head rod 503b is approximately the same as the length of the flat head rod 103b described in Fig. 1. Therefore, the configurations of the flange 502, the flat head rod 503b, and the second hollow portion 506b can be generally the same as those in Fig. 1.

[0037] The stud rod 503a is configured to be longer by the length of the hollow bolt 501, and is housed in the first hollow portion 506a so as to be able to slide freely. Stoppers 105 similar to those shown in Fig. 1 are provided near the base end of the stud rod 503a and near the tip of the flat head rod 503b. The stoppers 105 regulate the amount of driving by the driving rod 503 and prevent the driving rod 503 from slipping out of the hollow portion.

[0038] (Variation 2) In addition, by configuring the hollow bolt 101 by connecting multiple detachable hollow members, it is also possible to make the length (central axis length) of the hollow bolt 101 variable. Figure 11 is a configuration diagram of an anchor driving jig in which the hollow bolt 101 is configured from multiple hollow members.

[0039] As shown in Fig. 11(a), the anchor driving jig 10b has a hollow bolt 601 composed of multiple hollow members 601a, 601b. Other configurations are similar to those of the anchor driving jig 10 described in Fig. 1, but the hollow member 601b is configured to be separable from the flange 602.

[0040] 11(b) illustrates the configuration of hollow bolt 601. Hollow member 601a has thread 104 at one end for receiving anchor 20, and thread 610 at the other end for receiving hollow member 601b. Hollow member 601b has thread 611 at the end on the hollow member 601a side, and thread 612 at the other end. Flange 602 has thread 613 for receiving hollow member 601b.

[0041] In this embodiment, the screws 610 and 612 are female screws, and the screws 611 and 613 are male screws, but this may be reversed. Also, the screw 104 into which the anchor 20 is screwed and the screws 610, 611, 612, and 613 are fastened in opposite directions. By screwing in this manner, when removing the anchor 20 from the anchor driving jig 10b, it is possible to prevent the hollow members 601a and 601b and the flange 602 from being removed before the anchor 20 is removed. Note that even if the screw 104 into which the anchor 20 is screwed and the screws 610, 611, 612, and 613 have the same fastening direction, the same effect can be obtained by setting the fastening torque of the screws 610, 611, 612, and 613 to be larger than the fastening torque of the screw 104 and the anchor 20.

[0042] In FIG. 11, an example in which the hollow bolt 601 is composed of the hollow member 601a and the hollow member 601b has been described, but more hollow members 601b may be connected. That is, the number of hollow members 601b is determined according to the depth of the core hole 43, and the determined number of hollow members 601b are connected in series between the hollow member 601a and the flange 602. The lengths of the hollow members 601b may be the same or different, but having the same length is advantageous in terms of management and productivity. The length of the hollow members 601b may be the same as the interval d between the marks 107 (see FIG. 1), for example.

[0043] The driving rod 603 may be prepared in various lengths, as in the first modification, or may be variable according to the length of the hollow bolt 601. Fig. 12 is an explanatory diagram of a driving rod 603 with a variable length. The driving rod 603 is composed of a stud rod 615a, an intermediate rod 615b, and a flat head rod 615c. The functions of the stud rod 615a and the flat head rod 615c are similar to those of the stud rod 103a and the flat head rod 103b described above.

[0044] The relay rod 615b is connected to the stud rod 615a and the flat head rod 615c. There are various connection methods, but the connection is made with a binding force sufficient to maintain the stud rod 615a, relay rod 615b, and flat head rod 615c in a straight line even when struck by the anchor driving machine 30. For example, the relay rod 615b, the stud rod 615a, and the flat head rod 615c are fastened together by screws.

[0045] The overall length of the driving rod 603 may be the same as that in FIG. 1, in which the length d1 of the tip of the stud rod 615a protrudes from the screw 104 and the length d2 of the base end of the flat head rod 615c protrudes from the flange 602 before driving. The stopper 105 is provided in the second hollow portion 606b within a movable range as in FIG. 1. In FIG. 12, the second hollow portion 606b is provided in the hollow member 601b, and the first hollow portion 606a is provided in the hollow member 601a. ​​The stopper 105 is provided near the base end of the relay rod 615b and near the tip of the flat head rod 615c. The relay rods 615b correspond to the length of the hollow members 601b, and the same number as the hollow members 601b are used. For example, when two hollow members 601b are connected, two relay rods 615b are also connected.

[0046] In the above-described modified examples 1 and 2, since the length of the hollow bolts 501, 601 is variable, it becomes possible to embed the anchor 20 using an anchor driving jig 10a of an appropriate length according to the depth of the core hole 43. The method of driving the anchor 20 is as described in Fig. 7 and Fig. 8. Since the length of the hollow bolts 501, 601 is variable, when driving the anchor 20, the driving rod 103 is driven in with the flange 102 in contact with the tile 42, as shown in Fig. 9(b). This allows the work to be done in a stable state. [Explanation of symbols]

[0047] 10, 10a, 10b Anchor driving jig 101,501,601 Hollow bolt 102,502,602 Flanges 103,503,603 Driving stick 103a, 503a, 615a Stud rod 103b, 503b, 615c Flat head rod 20. Anchor 201 Anchor body 202 Expanded diameter part 203 Slit 204 Inner Cone 30 Anchor Driving Machine

Claims

1. A tool for driving an internal cone driving type anchor with a driving length of T1 into a core hole of T2 deeper than T1, the tool having a hollow bolt with a central axis length of T2-T1 or more, in which a driving rod for pressing the internal cone of the anchor is slidably housed in a hollow portion, A thread is threaded on the outer periphery of one end of the hollow bolt to be screwed into the anchor, The other end of the hollow bolt is provided with a flange having an outer diameter larger than the outer diameter of the core hole, thereby forming an anchor driving jig.

2. The driving rod is composed of a stud rod whose tip presses against the internal cone, and a flat head rod whose tip presses against the stud rod, Stoppers are provided near the base end of the stud rod and near the tip of the flat head rod to regulate the amount of driving and to prevent the stud rod from slipping out of the hollow portion. The anchor driving jig according to claim 1.

3. The hollow portion is composed of a first hollow portion that slidably accommodates only the stud rod, and a second hollow portion that has an inner diameter larger than that of the first hollow portion and slidably accommodates a contact portion between the stud rod and the flat head rod. The anchor driving jig according to claim 2.

4. The stopper is composed of a hard annular body fitted into a recess formed near the base end of the stud rod and near the tip end of the flat head rod. The anchor driving jig according to claim 2.

5. A plurality of hollow bolts having different central axis lengths are prepared as the hollow bolt, and are configured to be replaceable with respect to the flange. The anchor driving jig according to claim 1.

6. The hollow bolt is configured such that a plurality of hollow members can be detachably connected and the central axis length is variable. The anchor driving jig according to claim 1.

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