Ground rod driving aid

Abstract

To provide a ground rod driving aid having a simple structure in which an auxiliary tool is attached to the ground rod and the low position of the auxiliary tool is struck with a driving machine or the like when driving the ground rod into the ground.SOLUTION: An upper fixture 2 having an upper locking body for locking the upper end of a grounding rod B is provided on the side of the upper part of a rod-shaped support 1 so as to be movable and fixable along the support 1, a lower fixture 3 having an impact receiving surface 4 on the upper surface is provided at the lower part of the support 1, the impact receiving surface 4 of the lower fixture 3 is provided to protrude in a direction other than the side on which the upper locking body of the upper fixture 2 is provided, and a guide receiving seat 5 is provided on the end side surface of the lower fixture 3 to receive the lower part of the ground rod B whose upper end is locked to the upper fixture 2.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] This invention relates to an auxiliary device that can be attached to a ground rod when using a driving machine or equipment such as a hammer drill to drive the ground rods required for constructing structures, etc., into the ground, thereby improving the workability of the driving work. [Background technology]

[0002] When constructing a structure, it is necessary to ground it, and long ground rods (1.5 m etc.) are often used on-site to generate ground resistance. In this case, a special hammer drill is used to drive them in. The worker inserts the tip of the ground rod into the ground, places the hammer drill on the top of the ground rod, and operates the hammer drill to drive the ground rod into the ground.

[0003] However, because hammer drills are heavy and vibrate, and because the ground rods are long, workers must hold the hammer drill above their waists while working, making the job difficult and unsafe.

[0004] For this reason, when carrying out work, workers use portable work platforms and stand on the platforms to carry out the work. However, preparing the platforms takes time and effort, and the work is done at height, which can be unsafe.

[0005] Therefore, a method was developed in which the driving machine is hung from above by a rope and operated by the worker without having to support it.

[0006] The device described in Patent Document 1 is a holding device for a driving machine, which includes a pair of locking fittings for locking handles protruding from both sides of the top of a driving machine such as a hammer drill, a first cable that connects the pair of locking fittings to each other and has a length that allows at least the locking fittings to be engaged and disengaged from the handles, an expandable member having one end connected to the middle part of the first cable, and a second cable having one end connected to the other end of the expandable member and the other end wound around a winch via a pulley supported on the top of a tripod located above. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 5-266961 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0008] However, although the above-mentioned Patent Document 1 supports a driving machine such as a hammer drill with a winch via a tripod, thereby reducing the burden on the worker, it is necessary to separately prepare a holding device for the driving machine such as a tripod or winch, which increases costs and makes work difficult.

[0009] Therefore, in order to solve the above-mentioned problems, this invention aims to provide a ground rod driving aid with a simple structure in which an auxiliary tool is attached to the ground rod when driving the ground rod into the ground, and a low position of the auxiliary tool is struck with a driving machine or tool. [Means for solving the problem]

[0010] The invention of claim 1 is a ground rod driving aid comprising an upper fixing device having an upper retaining body that retains the upper end of a ground rod, which is provided at the top side of a rod-shaped support so as to be movable and fixable along the support, a lower fixing device having an impact receiving surface on its upper surface that protrudes in a direction other than the side on which the upper retaining body of the upper fixing device is provided, and a guide receiving seat that receives the lower part of the ground rod whose upper end is retained by the upper fixing device, provided on the end side of the lower fixing device.

[0011] In addition, the invention of claim 2 is a ground rod driving aid described in claim 1, which is provided with a lower locking device that detachably locks the lower part of the ground rod placed on the guide receiving seat of the lower fixing device to the lower fixing device.

[0012] In addition, the invention of claim 3 is a ground rod driving aid described in claim 1 or 2, in which the upper retaining body that retains the upper end of the ground rod of the upper fixing device is a retaining rod that is inserted into a hole provided on the upper end surface of the ground rod.

[0013] The invention of claim 4 is directed to the ground rod driving aid of any one of claims 1 to 3, wherein a guide rod for engaging the tip of a power tool is provided on the impact receiving surface of the lower fixing device.

[0014] The invention of claim 5 is the ground rod driving aid of any one of claims 1 to 4, wherein the lower fixing device is movable and fixed along the support pole.

[0015] In addition, the invention of claim 6 is a ground rod driving aid as described in claim 5, in which the support has an outer thread shape, and the upper fixing device or lower fixing device is passed through a through hole that penetrates from top to bottom, and is fixed with nuts screwed onto the support above and below the upper fixing device or lower fixing device. [Effects of the Invention]

[0016] According to the invention of claim 1, the upper end of the ground rod is engaged with the upper retaining body of the upper fixing device of the auxiliary support pole, and the impact receiving surface of the lower fixing device of the support pole is struck with a power tool such as a hammer drill, allowing the ground rod to be driven directly into the ground. This allows the worker to work stably while standing on the ground, making work quicker and safer. Since there is no need to lift a power tool high up to the upper end of the ground rod as in the past, the workload is reduced. Furthermore, there is no need to prepare tools such as a portable workbench or perform unstable work on such a portable workbench.

[0017] In addition, the upper fixture can be moved and fixed freely along the support, so it can accommodate ground rods of different lengths. Also, because the upper and lower fixtures of the auxiliary tool support the top and bottom of the ground rod, there is no need to support the ground rod itself during the driving work.

[0018] Furthermore, according to the invention of claim 2, the ground rod is brought into contact with the guide receiving seat of the lower fixing device, and the ground rod is detachably engaged with the lower engaging device, so that the ground rod is securely engaged with the auxiliary device, the ground rod and the auxiliary device are integrated, making it easier to support the ground rod itself, and the force of the impact is reliably transmitted, which helps to improve the efficiency of the driving work.

[0019] According to the invention of claim 3, the upper retaining body that retains the upper end of the ground rod of the upper fixing device is a retaining rod that is inserted into a hole provided on the upper end surface of the ground rod, so the upper end of the ground rod can be retained extremely easily, improving work efficiency and preventing the upper end of the ground rod from being crushed.In addition, since this auxiliary device can be easily removed from the ground rod, it is easy to add or remove the ground rod.

[0020] Furthermore, according to the invention of claim 4, a guide rod is provided to engage the tip of the power tool with the impact receiving surface of the lower fixing device, so that the tip of the power tool is fixed, making pouring stable and efficient.

[0021] Furthermore, according to the invention of claim 5, the lower fixing device can be freely moved and fixed along the support, so that the upper fixing device and the lower fixing device on the support can be moved and fixed, further expanding the range of engagement points with the ground rod and compatibility with ground rods of different lengths.

[0022] Furthermore, according to the invention of claim 6, the upper and lower fixing devices can be moved and fixed by simply tightening and loosening nuts, making these operations easy. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a front view of a ground rod driving auxiliary tool according to a first embodiment of the present invention. [Figure 2] 1 is an enlarged cross-sectional view of an upper retaining body of an upper fixing device of a ground rod driving auxiliary tool according to a first embodiment of the present invention, and the upper end of a ground rod that is retained by the upper retaining body. [Figure 3] 1 is an enlarged perspective view of a guide receiving seat and a lower locking device of a lower fixing device of a ground rod driving auxiliary tool according to a first embodiment of the present invention. FIG. [Figure 4] 1 is a front view of a state in which a ground rod and an electric drill are attached to a ground rod driving auxiliary tool according to a first embodiment of the present invention. FIG. [Figure 5] FIG. 1 is a front view showing a state in which the positions of the upper and lower fixing devices of the ground rod driving auxiliary tool of the first embodiment of the present invention are changed and the ground rod is being driven into the ground. [Figure 6] FIG. 10 is a perspective view of an upper fixing device of a ground rod driving auxiliary tool according to a second embodiment of the present invention. [Figure 7] FIG. 10 is a perspective view of the ground rod driving auxiliary tool of the second embodiment of the present invention with the upper fixture open. [Figure 8] FIG. 10 is a front view of the upper fixing device of the ground rod driving auxiliary tool of the third embodiment of the present invention. [Figure 9] FIG. 10 is a cross-sectional view of an upper fixture of a ground rod driving auxiliary tool according to a third embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0024] (Embodiment Example 1) A ground rod driving aid A according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 5. FIG.

[0025] As shown in Figure 1, this ground rod driving aid A has an upper fixture 2 which has an upper locking body that locks the upper end of a ground rod B and is attached to the top side of a rod-shaped support 1 so that it can be moved freely along the support and fixed freely, and a lower fixture 3 which has an impact receiving surface on its upper surface attached to the bottom of the support 1, and the impact receiving surface 4 of the lower fixture 3 protrudes on the side opposite to the side where the upper locking body of the upper fixture 2 is attached, and a plurality of guide receiving seats 5 are attached to the end side of the lower fixture 3 to receive the lower part of the ground rod B whose upper end is locked by the upper fixture 2.

[0026] The support 1 is threaded along its entire length or on the outer periphery of only the upper and lower parts, and the upper fixture 2 and lower fixture 3 each have through-holes that pass through from top to bottom, and the support 1 is inserted into these through-holes and nuts 6 are screwed onto the upper and lower ends of the fixture, thereby fixing it to the support 1. Therefore, by loosening each nut 6 and moving the position of the upper fixture 2 and lower fixture 3 relative to the support 1, it is possible to tighten the nuts 6 at any point, and the position can be changed by changing the length of the ground rod B or by changing the spacing between the upper fixture 2 and lower fixture 3.

[0027] As shown in Figure 2, the upper fixing device 2 has a downward-facing locking rod 7 hanging down from the underside of an upper protrusion 2a away from the support post 1 as the upper locking body, and this locking rod 7 is able to fit freely into an opening B2 of a sleeve B1 provided at the upper end of the ground rod B. The upper fixing device 2 also has a protrusion 2b with an abutment seat 8 on its tip surface that abuts against the side of the sleeve B1 when the locking rod 7 of the upper fixing device 2 is inserted into the opening B2 of the ground rod B. The abutment seat 8 has a curved concave cross section.

[0028] A guide rod 9 into which the tip hole of an electric drill C fits is provided on the strike receiving surface 4 on the upper surface of the lower fixture 3. The guide receiving seat 5 is provided on the side surface of the end of the lower fixture 3 opposite the guide rod 9. The lower locking device may be a binding wire 10 wound around a ground rod B and fastened to bolts 11 provided on both sides of the lower fixture 3, as shown in Figure 4. Alternatively, as shown in Figure 3, a pair of tightening bands 12 having buckle-type connectors 12a at their tips may be provided on the sides of the lower fixture 3, and with the lower part of the ground rod B placed on the guide receiving seat 5, the pair of tightening bands 12 can be wound around the ground rod B and fastened with the connectors 12a to lock the lower part of the ground rod B.

[0029] As shown in Figure 4, the ground rod driving aid A having the above structure has the locking rod 7 of the upper protrusion 2a of the upper fixture 2 inserted into the opening B2 of the sleeve B1 of the ground rod B, the sleeve B1 of the ground rod B placed against the abutment seat 8 of the lower protrusion 2b, the lower part of the ground rod B placed on the guide receiving seat 5 of the lower fixture 3, and the binding wire 10 wrapped around the ground rod B to lock it in place, and the tip of the electric drill C inserted into the guide rod 9 to lock it in place, the tip of the ground rod B is thrust into the ground, and the electric drill C is operated to drive the ground rod B into the ground.

[0030] Then, when the tip of ground rod B is driven into the ground, the position of electric drill C drops, making it difficult to operate. Therefore, remove ground rod driving aid A from ground rod B, and as shown in Figure 5, move upper fixture 2 downward along support 1 and fix it in the middle of support 1, and attach this to ground rod B. This raises the position of electric drill C away from the ground, making it easier for the operator to operate. In this case, the lower fixture can also be moved above support 1.

[0031] (Embodiment Example 2) Next, a ground rod driving aid D according to a second embodiment of the present invention will be described with reference to FIGS.

[0032] The ground rod driving aid D of this second embodiment differs from that of the first embodiment only in the upper fixing device 13, and the other structures are the same.

[0033] This upper fixing device 13 uses a commercially available "Fully Threaded Catcher" (trademark, manufactured by Tanizawa Manufacturing Co., Ltd.), and consists of a pair of side frames 14 that open and close using hinges 15 at one end. Each side frame 14 has a female screw section 16 on the inside of a recess with an approximately semicircular cross section, with threads running along the inner periphery. When the upper part of the support 1 is placed into the pair of open side frames 14, the female screw section 16 engages with the outer screw on the support 1 to close the pair of side frames 14, and these are then overlapped and fixed with a stator 17, the upper fixing device 13 is fixed to the outer periphery of the support 1.

[0034] The upper end of the ground rod B is engaged with the upper engaging rod 7 extending from the underside of the side frame 14 of the upper fixing device 13 for use.

[0035] (Embodiment Example 3) Next, a ground rod driving aid E according to a third embodiment of the present invention will be described with reference to FIGS.

[0036] The ground rod driving aid E of this third embodiment differs from that of the first embodiment only in the upper fixture 20, and the rest of the structure is the same.

[0037] This upper fixing device 20 uses a commercially available "screw clamp" (trademark, manufactured by Fujii Denko Co., Ltd.), and has an upper frame body 22 with a hook portion 21 of a certain width on one side, and a similar lower frame body 23. An outer frame body 24 is provided in a position opposite these upper frame body 22 and lower frame body 23, and operating levers 25 and 26 are rotatably supported between them. The two upper and lower operating levers 25, 26 are urged to rotate clockwise in Figure 9 by a spring 27, and when the operating lever 28 is rotated counterclockwise in Figure 9 against the force of the spring 27, the operating levers 25 and 26 rotate counterclockwise.

[0038] A number of teeth are provided at the tip of each of the operating levers 25 and 26. A hook 29 is provided at the lower end of the outer frame 24, and a locking rod 7 is provided at the bottom surface of the hook 29.

[0039] This upper fixing device 20 is attached to the support 1 as shown in Figure 8 by inserting the support 1 having an outer periphery screw into the hook portion 21 of the upper frame 22 and the hook portion 21 of the lower frame 23. As a result, the tips of the upper and lower operating levers 25 and 26 press against the support 1 due to the force of the spring 27, and the upper fixing device 20 is fixed to the support 1. Then, when the ground rod driving aid E is attached to the ground rod B and the ground rod B is driven into the ground with an electric drill C, the ground rod B receives a force that pushes up the hook portion 29 of the upper fixing device 20, which causes the operating levers 25 and 26 to be pressed by the support 1, and the upper fixing device 20 is fixed to the support 1 and does not move.

[0040] As described above, the upper fixing devices 13 and 20 of the second and third embodiments can be attached to and detached from the support 1 very easily, and once fixed to the support 1, they will not shift out of position.

[0041] In the above-mentioned embodiments 1, 2, and 3, the support 1 is threaded along its entire length or at the top and bottom, but this is not a limitation and the support 1 is not limited to being threaded on the outside. Also, in the above-mentioned embodiments, an electric drill is used, but the guide rod 9 of the lower fixing device 2 may be removed and a hammer may be used to strike the strike receiving surface 4. In this case, it is still difficult to strike the upper end of the ground rod B, but it can be easily struck by using the ground rod striking aid.

[0042] Furthermore, the guide receiving seat 5 and the binding wire 10 and tightening band 12 of the lower fastening device in the above-mentioned first, second and third embodiments are not limited to these, and other configurations of the guide receiving seat 5 and lower fastening device may be used. Furthermore, the configuration in which the upper fastening device 2 and the lower fastening device 3 are freely movable and fixed relative to the support 1 is not limited to the above-mentioned first, second and third embodiments. [Explanation of symbols]

[0043] A, D, E Ground rod driving aids B. Grounding rod C. Electric drill 1 Post 2 Top fixture 2a Upper protrusion 2b Lower protrusion 3 Lower fixing device 4 Impact receiving surface 5 Guide seat 6 Nut 7 Locking rod 8 Abutment seat 9 Guide rod 10 Binding wire 11 Bolt 12 Tightening band 12a Connector 13 Upper fixing 14 Pair of side frames 15 Hinge 16 Female thread portion 17 Stator 20 Upper fixing bracket 21 Hook 22 Upper frame 23 Lower frame 24 outer frame 25 operating lever 26 Operating lever 27 Spring 28 Operating lever 29 Hook

Claims

1. an upper fixture having an upper locking body for locking the upper end of the grounding rod is provided at the side of the upper part of the rod-shaped support so as to be movable along the support and fixed thereto; a lower fixing device having an impact receiving surface on an upper surface thereof is provided at a lower portion of the support pillar, the impact receiving surface of the lower fixing device being provided in a direction other than the side on which the upper locking body of the upper fixing device is provided; A ground rod driving aid characterized in that a guide receiving seat is provided on the end side of the lower fixing device to receive the lower part of the ground rod whose upper end is engaged with the upper fixing device.

2. 2. The ground rod driving aid according to claim 1, further comprising a lower fastening device for detachably fastening the lower part of the ground rod placed on the guide receiving seat of the lower fastening device to the lower fastening device.

3. 3. The ground rod driving aid according to claim 1, wherein the upper retaining body that retains the upper end of the ground rod of the upper fixing device is a retaining rod that is inserted into a hole provided on the upper end surface of the ground rod.

4. The ground rod driving aid according to any one of claims 1 to 3, characterized in that a guide rod for engaging the tip of a power tool is provided on the impact receiving surface of the lower fixing device.

5. The ground rod driving aid according to any one of claims 1 to 4, wherein the lower fixing device is movable and fixed along the support pole.

6. 6. The ground rod driving aid of claim 5, wherein the support has an outer periphery threaded, and the upper fixture or the lower fixture is fixed by passing the support through a through hole that penetrates vertically and fastening the upper fixture or the lower fixture with a nut screwed onto the upper and lower supports of the upper fixture or the lower fixture.

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