JP4504218B2 - Screw rod removal device screwed into insert nut - Google Patents

Description

  The present invention relates to a technical field of construction for attaching piping or the like to an indoor ceiling of a building or the like. More specifically, the present invention belongs to the technical field of an apparatus for removing a screw rod screwed for protection when the insert nut is buried in a concrete ceiling.

Conventionally, in construction for attaching piping etc. to the indoor ceiling of a building such as a building, as disclosed in Patent Document 1, for example, an insert nut is embedded in a concrete ceiling, and the piping etc. is supported by the insert nut, A fixed hanging tool is attached. FIG. 4 shows this state. In FIG. 4, the insert nut 51 is embedded in the concrete 52 on the ceiling. After the concrete 52 is set, an upper end threaded portion 53a of a hanging tool 53 for supporting and fixing a pipe or the like at an appropriate time is screwed and fixed to a female threaded portion of an insert nut. The central part 53b is a bar part, and a fixing bracket 54 for supporting and fixing the pipe 55 is attached to the lower end part 53c.
Published patent publication, JP 08-270838 (wiring / piping support)

  However, when a steel beam is provided to reinforce the strength of the ceiling concrete and an insert nut is provided on the side, the following problems arise. That is, as shown in FIG. 5, the steel beam 60 is provided below the ceiling concrete 52, and the insert nut 51 may be embedded in the vicinity thereof. In the case of FIG. 5, the steel beam 60 is provided on the lower surface of the ceiling concrete 52 provided with the deck plate 61. The insert nut 51 portion of the deck plate 61 has a hole (not shown), and the screw hole of the insert nut 51 is exposed. After the steel beam 60 is attached, a heat insulating material (for example, rock wool material) 62 is sprayed on the surface thereof. Therefore, if the blowing operation is performed as it is, the surface of the insert nut 51 is covered with a heat insulating material, and the location of the insert nut 51 is not known. In addition, a part of the heat insulating material 62 enters the screw hole of the insert nut 51, and the hanging tool 53 cannot be attached.

  In order to solve this problem, conventionally, an insert nut hinged with a temporary bolt is attached on the deck plate before placing concrete, or the temporary bolt 64 is inserted into the insert nut 51 before the insulation material 62 is sprayed. It is necessary to remove the temporary bolt 64 after screwing in the screw hole and before the hanging tool 53 is attached after the spraying operation. Conventionally, a rolling tower is used to remove the temporary bolt 64, a scaffold is assembled, and the climber is climbed on it, and a temporary turning is performed using an apparatus 65 provided with a bolt turning tool 67 at the tip of the heel 66. The bolt 64 was removed. In addition, the temporary bolt 64 used the volt | bolt (both screw volt | bolts) which cut the screw at both ends, or all the screw bolts.

FIG. 6 is an exploded view for explaining the conventional device 65 in detail. The bolt turning tool 67 is a tool for turning a bolt by detachably holding a screw portion. If the screw bolt is inserted into the insertion hole 67b of the bolt turning tool 67 and rotated leftward, the screwed screw bolt can be removed. In addition, since description is disclosed by patent document 2 about this tool itself, since it is commercialized and marketed, detailed description is abbreviate | omitted. The fixing support 67a of the bolt turning tool 67 is fixed to the tip of the flange 66 so as not to rotate. For example, a wire 66 is used as the flange 66, and a block 66a having a hole 66b fitted to the fixed support portion 67a at the tip is fixed with an adhesive or the like.
Published Patent Publication, JP 2003-94348 (Socket for bolt)

  As described above, in the above-described conventional apparatus, a scaffold or the like has to be assembled, or a sufficiently long gutter must be used. In the case of building a scaffold, there is a problem that complicated work increases accordingly. In addition, when using a long rod, it is difficult to insert the temporary bolt (hereinafter referred to as “screw rod”), which is screwed into the insert nut, into the bolt insertion hole of the bolt turning tool 67 by properly approaching it. The problem arises. Furthermore, when the screw rod is removed from the insert nut, there is a risk that the screw rod will fall and cause an accident. It is an object of the present invention to provide a screw rod detaching apparatus that solves the above problems.

In order to solve the above problems, the present invention employs the following means. That is,
The invention according to claim 1 is an apparatus for removing a screw rod screwed into an insert nut embedded in concrete of an indoor ceiling of a building or the like, and a bolt turning tool provided at the tip of a long rod, and an upper side of the bolt turning tool Magnet means fixed in a detachable manner, the magnet means having an upper cylindrical body and a lower cylindrical body, the lower cylindrical body being detachably fixed to the bolt turning tool , the donut-shaped magnet fixed to the center line of the threaded rod insertion hole of the center line and the bolt driving tool of the hole in the donut-shaped magnet on the inside of the upper tubular member is coincident, the magnetic field lines of the toroidal magnet the upper It is configured to radiate in the upward direction of the cylindrical body, a guide function that makes it easy to insert the lower end of the screw rod screwed into the insert nut into the insertion hole of the bolt turning tool, and prevents the removed screw rod from falling Fall prevention It is characterized in that it has to exert the function.

According to a second aspect of the present invention, in the first aspect of the present invention, the donut-shaped magnet is a phylite-based magnet.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the donut-shaped magnet is an electromagnet formed by winding a coil around an outer periphery of a donut-shaped iron core.

The invention of claim 4 is the invention according to claims 1 to 3, wherein the upper tubular body constituted by a steel material, the upper peripheral wall of the upper tubular member is on the toroidal magnet It is characterized by projecting from the surface.

The invention described in claim 5 is characterized in that, in the invention described in claims 1 to 4, the eaves are made extendable.

  According to the present invention, it is not necessary to assemble a scaffold or the like, and the screw rod screwed to the insert nut can be easily removed. Furthermore, since the removed screw rod can be prevented from falling, an effect of improving work safety can be obtained.

  FIG. 1 shows an overall view of an embodiment of the present invention. FIG. 2 shows a cross section of the main part of the embodiment. FIG. 3 shows an exploded view of the embodiment. In order to simplify the explanation, the part numbers are unified. In FIG. 1, the eaves 11 are configured to be extendable. For example, the long rod 11 is composed of a double tube, and the inner thin tube 12 is configured such that the lower end portion is inserted into the upper end portion of the outer thick tube 13 and can slide in the length direction. Further, the upper end portion of the outer thick tube 13 is provided with a slit-like cut in the length direction and is threaded on the upper surface. The fixing ring 14 is threaded on the inside, and is screwed with the screw at the upper end portion of the outer thick tube 13 so that the inner thin tube 12 can freely fix the lower end portion. A handle portion 15 is provided so that the lower end portion of the outer thick tube 13 can be easily held. Further, a screw rod removing tool 16 is fixed to the tip of the long rod 11 (tip of the inner thin tube 12).

  As shown in FIGS. 2 and 3, the screw rod removing tool 16 is inserted into the lower cylindrical body 20 a of the two-stage cylindrical case 20 by a bolt turning tool 67 and is detachable using the thumbscrew 21. It is fixed. It arrange | positions inside the upper cylindrical body 20b so that it may correspond with the centerline of the hole 23a of the donut type philite system magnet 23, and the centerline of the insertion hole 67b of the volt | bolt turning tool 67, and the upper cylindrical body 20b with an adhesive agent etc. It is stuck to. The doughnut-type philite-based magnet 23 is magnetized so that the upper side surface is an N pole (or S pole), and magnetic lines of force 25 are radiated upward. Further, if the upper end of the hole 23a of the donut-type philite magnet 23 is rounded and inclined, the screw rod 64 can be easily inserted. Further, the upper peripheral edge 20c of the upper cylindrical body 20b is configured to protrude slightly (for example, 2 to 5 mm) from the upper surface of the donut-type philite magnet 23. This protrusion has an effect that the removal tool 16 does not strongly adsorb to the ceiling surface deck plate but strongly adsorbs to the screw rod 64 protruding from the ceiling.

  This embodiment is configured as described above and functions as follows. That is, when the screw rod 64 is removed from the insert nut 51, the length of the long rod 11 is first adjusted appropriately. The upper surface of the magnet 23 is brought close to the lower end of the screw rod 64 while supporting the handle portion 15 by hand. When approaching within a certain distance, the screw rod 64 is pulled by the action of the lines of magnetic force 25, and the lower end portion of the screw rod 64 is attracted to the upper surface of the magnet 23. In this state, the lower end of the screw rod 64 is inserted into the insertion hole 67b when the tip of the long rod 11 is slightly shaken back and forth. In this state, the long rod 11 is pivoted leftward. Initially, the screw rod 64 is fixed to the bolt driver 67, and then the screw rod 64 is removed from the insert nut 51.

As described above, according to this embodiment, there is no need to assemble a scaffold or the like, the screw rod screwed into the insert nut can be easily removed, and the removed screw rod can be prevented from dropping. The effect that the safety of work can be improved is obtained.
Instead of the phyllite magnet 23, an electromagnet formed by winding a coil around the outer periphery of the donut-shaped iron core may be used.

  The embodiments and examples of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to the examples, and there are design changes and the like without departing from the gist of the present invention. Are also included in the present invention. For example, the cylindrical bodies 20a and 20b may be rectangular (for example, hexagonal cylindrical) instead of a cylinder.

1 shows an overall view of an embodiment implementing the present invention. The main part cross section of this embodiment is shown. The assembly exploded view of the principal part of this embodiment is shown. The conventional piping attachment apparatus is shown. The problem of a conventional apparatus is shown. A conventional apparatus is shown.

Explanation of symbols

11 Nagatoro 12 inner narrow tube
13 outer thick tube 14 fixing ring 16 screw rod removal tool 20 two-stage cylindrical case 21 thumbscrew 23 donut-type philite magnet 51 insert nut
64 Screw rod (temporary bolt)
67 Bolt turning tool

Claims (5)

In a device that removes a screw rod screwed into an insert nut embedded in the concrete of an indoor ceiling such as a building,
A bolt-turning tool provided at the tip of the long rod, and magnet means detachably fixed to the upper side of the bolt-turning tool;
The magnet means has an upper cylindrical body and a lower cylindrical body, the lower cylindrical body is detachably fixed to the bolt turning tool , and a donut-shaped magnet hole is formed inside the upper cylindrical body. configured such that the center line center line between the screw rod insertion holes of the bolt driving tool is secured to the toroidal magnet to match, field lines of the toroidal magnet radiates to the upper direction of the upper tubular member And
A guide function that makes it easy to insert the lower end of the screw rod screwed into an insert nut into the insertion hole of the bolt turning tool and a fall prevention function that prevents the removed screw rod from falling are characterized. A screw rod removal device screwed onto the insert nut. 2. The screw rod detaching apparatus screwed on an insert nut according to claim 1 , wherein the donut-shaped magnet is a philite magnet. 2. The screw rod detaching device screwed into an insert nut according to claim 1, wherein the donut-shaped magnet is an electromagnet formed by winding a coil around an outer periphery of a donut-shaped iron core. The upper tubular body is constituted by a steel material, any of claims 1 to 3 the upper wall of the upper tubular member is characterized by being configured so as to protrude from the upper surface of the donut-shaped magnet A screw rod removing device screwed onto the insert nut according to claim 1. The screw rod detaching device screwed into the insert nut according to any one of claims 1 to 4 , wherein the elongated rod is extendable.

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