JPH02274473A - Form tie rotating tool - Google Patents

Abstract

PURPOSE:To perform the screw out of a form tie easily and conveniently with good operability by orthogonally linking a locking shaft in which a form tie is inserted and a rotary shaft connected to a rotating machine with the use of an orthogonal transmission mechanism. CONSTITUTION:A form tie 6 is inserted into the hole of a locking shaft 7 and the locking shaft 7 and form tie 6 are engaged coaxially. In this case, the locking shaft 7 is linked orthogonally with a rotary shaft 2 via an orthogonal transmission mechanism. Thus, by driving the rotary shaft 2 by a rotating machine 10, the rotary shaft 2 can correctly be rotated around the center thereof without causing the deflection in the shearing direction on the form tie 6, which can be screwed out easily with good operability.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention enables convenient and easy unscrewing of home ties from separators, and improves the efficiency of dismantling concrete pouring frameworks. Regarding Uruhome Tie rotary tools.

[Conventional technology]

For example, the foundation of a house is formed by pouring concrete into a framework using formwork panels spaced parallel to each other. A separator 5 is passed between the frame panels a and a.
It is assembled integrally by screwing the home ties C into the threaded portions b1 at both ends. Furthermore, after concrete is poured, this framework is dismantled by unscrewing the home ties C, leaving the separator b behind.
This is done by rotating the handle in the same direction as the screwing direction using a manual rotating tool d having a handle di protruding from the outer periphery of the base into which the screw is fitted.

[Problem to be solved by the invention]

However, this rotating tool d has a long handle d1 in order to generate a large rotational torque, and since the home tie C itself is long in the axial direction, it is difficult to perform an accurate rotation operation similar to that of the home tie C. It is inferior in operability, such as causing deflection in the shear direction at C. Further, since the home tie C is usually installed in a low place, the working posture becomes unreasonable, and this tendency becomes more pronounced especially when the home tie C is installed in a deep place or a narrow place close to an outer wall. Incidentally, since the separators b are attached at many locations along the formwork panel, such a decrease in operability will greatly impair the efficiency of the dismantling work of the framework.

An object of the present invention is to provide a home-tie rotary tool that can solve the above-mentioned problems by using a right-angle transmission mechanism and linking a locking shaft and a rotating shaft at right angles.

[Means to solve the problem]

In order to achieve the above object, the home tie rotary tool of the present invention has a home tie that can separate formwork panels and that screws off a home tie that is screwed into a threaded part of a separator that protrudes outside the formwork panel. The rotary tool is provided with a housing at one end of a body that supports a rotating shaft, and a rotating machine that drives the rotating shaft is attached to the other end, and the home tie can be inserted into the housing, and the home tie is inserted into the housing. A locking shaft having a hole matching the shape of the body is pivoted perpendicularly to the longitudinal direction of the body, and the rotating shaft and the locking shaft are linked by a right-angle transmission mechanism.

[Effect]

The home tie is inserted into the hole of the locking shaft, and the locking shaft and the home tie are engaged with the same window. The locking shaft is linked at right angles to the rotating shaft via a right-angle transmission mechanism, so that by driving the rotating shaft with a rotating machine, the home tie is not deflected in the shearing direction (around its center). It can be rotated accurately and the home tie can be easily screwed off with good operability.The locking shaft can generate a desired rotational torque by selecting the transmission ratio of the right angle transmission mechanism.

In addition, since the locking shaft and rotating shaft of the home tie rotary tool are linked at right angles, there is no need for operating space outside the home tie in the axial direction, making it possible to work conveniently even in narrow spaces. , the rotary machine can be used in an upright position with the machine facing upward, improving the working posture.

〔Example〕

In the figure, a home tie rotary tool 1 has a housing 5 provided at one end of a body 3 that supports a rotating shaft 2, and a locking shaft 7 into which a home tie 6 can be inserted is pivoted perpendicularly to the longitudinal direction of the body 3. The rotating shaft 2 and the locking shaft 7 are linked by a right angle transmission mechanism 9, and by operating a rotating machine 10 attached to the other end of the body 3 and driving the rotating shaft 2, The home tie 6 screwed into the separator 12 protruding from the formwork panel 11 is unscrewed.

As shown in FIG. 4, the formwork panel 11 cooperates with the separator 12 and the home tie 6 to form a framework 13, and in this example, by pouring concrete into the framework 13. Forms the foundation of a house.

The formwork panel 11 has a leg piece 11B at the lower end of a flat plate-like elongated substrate part 11A, and is arranged parallel to each other with a gap, for example, on a footing buried underground. Further, the formwork panel 11.11 has insertion holes 15-- at positions where the substrate parts 11A and IIA face each other, and the separator 12 is placed between the facing insertion holes 15.

The separator 12 has a base shaft 12 extending between the formwork panels 11.
It has a long shaft shape with flanges 12B extending from both ends of A,
A threaded portion 16 extending outward through the insertion hole 15 is formed on the outer surface of the flange portion 12B. Therefore separator 1
2 can space the form panel 11.11 apart by abutting the outer surface of the flange portion 12B and the inner surface of the substrate portion IIA.

Further, the home tie 6 includes a base portion 20 having a substantially rectangular cross section and extending into the same window as the internal screw hole 17 at the outer end of the neck portion 19, which has an internal screw hole 17 at the inside end that engages with the screw portion 16; In this example, a rectangular hole 2 is provided between the opposing long surfaces of the base 20.
1 are transparently provided in a straight line along the longitudinal direction of the base 20. In this example, the base 20 has a substantially gourd shape bulging in the width direction by press-molding rectangular holes 21 and 21. Therefore, the home tie 6 is screwed onto the threaded portion 16, so that The form panel 12 can be held between the neck part 19 and the flange part 12B, and the frame body 13 can be integrated. In this example, a wedge piece 22 is screwed into the rectangular hole 21 of the home tie 6 that faces upward, and the reinforcing bar 23 is supported horizontally with pressure between the wedge piece 22 and the formwork panel 11. By doing so, it is possible to prevent outward deflection and deformation of the form panel 11 due to internal pressure associated with concrete pouring.

Further, in order to dismantle and hold the frame body 13 and to screw off the home tie 6, the home tie rotating tool 1 of the present invention is used.

As shown in FIGS. 1 to 3, the home tie rotary tool 1 has a cylindrical body 3 having an inner hole 3A, and has a housing 5 at one end, that is, the front end in this example, and a cap body at the other end, that is, the rear end. 2
5 is set.

The housing 5 has a fitting portion 26 that fits into the inner hole 3A of the body portion 3.
A base body 26 with a rectangular base 26B expanded at the front end thereof, and a lid body 2 screwed onto the front and side surfaces of the base 26B.
It consists of 9.30.31.

The base body 26 also has a stepped first insertion hole 27 which has one end opening at the rear surface of the fitting portion 26A and the other end extending forward and which opens at the front surface of the base portion 26B;
A second through hole 28 is opened on both sides and is at a different height from the first Shinto hole 27 and faces at a right angle. The large diameter portions 27B and 28B communicate with each other via the outer large diameter portions 27B and 28B, and the outer large diameter portions 27B and 28B form a storage chamber for a right angle transmission mechanism 9, which will be described later.

In addition, the cap body 25 has a bearing piece 33 fixed via a retaining ring in the inner hole 32A of the base cylinder 32, which has a fitting part that fits into the rear end of the body part 3. The bearing piece 34 is fitted into the flange 35B of a base plate 35 which has a ring-shaped flange 35B that fits into the large diameter portion 27B and is screwed to the front surface of the base 26B.

Each bearing piece 33, 34 is arranged in the same direction as the first insertion hole 27, and between the bearing pieces 33, 34, there is a rotary shaft 2 that passes through the first insertion hole 27 and the inner hole 3A. is inserted.

Therefore, in this example, the body portion 3 rotatably supports the rotating shaft 2 via the cap body 25 and the lid body 29 of the housing 5. Note that a bearing piece may be provided in the body 3 so that the rotating shaft 2 can be directly supported by the body 3.

The lids 30 and 31 have substantially the same structure as the lid 29, and each has a base plate 39 with a ring-shaped flange 37 that is fitted into the second insertion hole 28 and protrudes inward. The inner hole 40 is arranged on the same side as the second insertion hole 28, and the locking shaft 7 passing through the second insertion hole 28 is inserted between the inner holes 40.

The locking shaft 7 includes a base shaft 41 that is rotatably supported by being loosely fitted into the inner hole 40, and the base shaft 41 has a substantially rectangular hole 42 that matches the cross-sectional shape of the home tie 6. Both ends are open to the same person.

Further, the rotating shaft 2 and the locking shaft 7, which are disposed at right angles at different heights, are linked by a right-angle transmission mechanism 9.

In this example, the right-angle transmission mechanism 9 includes a worm W that is integrally fixed to one end of the rotating shaft 2 using a key or the like, and a worm W that is integrally fixed to the locking shaft 7 and meshes with the worm W. The right-angle transmission mechanism 9 transmits the rotation of the rotary wheel 2 to the locking shaft 7 while decelerating the rotation at a predetermined gear ratio. The worm W is sandwiched between the bearing piece 34 and the step 27A, and the worm wheel WH is sandwiched between the flanges 37 of the lid 30.31, so that the worm W is inserted into the large diameter portions 27B and 28B without being displaced. It will be stored.

Further, the rotating shaft 2 is located behind the cap body 25.

A connecting portion 45 in which a rotation stopper 43 is formed by, for example, milling the circumferential surface is provided on the protruding portion that protrudes in the opposite direction, and is connected to a rotating machine 10 that rotationally drives the rotating shaft 2 through the connecting portion 45.

In this example, as shown in FIG. 1, the rotary machine 10 is a hand-held electric type used for a hand drill, etc., and has a chuck connected to the drive shaft 46 of the rotary machine 10 and the connecting portion 4.
5, the rotating machine 10 can be detachably attached to the other end of the body 3 via the rotating shaft 2 so that the rotating shaft 2 can be driven.

Note that, as shown in FIG. 6, for example, the rotating machine 10 has a retaining part 46B provided at the end of the drive shaft 46 and a locking part 2A provided at the end of the rotating shaft 2 that mesh with each other, and By screwing the screw ring 50 to the body 3, it can be directly attached to one end of the body 3, and the rotating machine 10 can also be attached directly to one end of the body 3.
Various attachment means and forming means can be employed, such as integrally forming the main body, the trunk 3, the output shaft 46, and the rotating shaft 2. Further, as the rotating machine 10, various types of rotating machines can be used, such as an engine-type rotating machine 10A and an air motor-type rotating machine 10B, as shown in FIGS. 7(a) to 7(a).

In this example, one substrate 39A of the lid body 30.31 is made thicker than the other substrate 39B, and the lid body 3 of the home tie 6 is made thicker than the other substrate 39B.
By distinguishing between insertion into the hole 42 from the zero side and insertion from the lid 31 side, it is possible to perform screw-off rotation and screw-on rotation to the home tie 6.

The home tie 6 that supports the frame body 13 is then inserted into the hole 42 of the locking shaft 7 of the home tie rotary tool 1. Note that the home tie rotary tool 1 connects the rotating shaft 2 to a right-angle transmission mechanism 9.
Since it is linked at right angles to the locking shaft 7 via the rotary machine 10, it can be operated in an upright position with the rotary machine 10 facing upward, improving the working posture and allowing the home tie 6 to be placed in narrow or deep places. You can also work conveniently in any case.

Furthermore, since the locking shaft 7, which rotates via the right-angle transmission mechanism 9 due to the operation of the rotating machine 10, is engaged with the home tie 6, it is difficult to accurately screw and unrotate the home tie 6. and does not induce deflection in the shear direction of the home tie 6.
The separator 12, which functions as a reinforcing bar for the foundation, is formed by weakening the strength of the threaded portion 16 so that the threaded portion 16 protruding from the side surface of the foundation can be cut after the framework 13 is dismantled. Deflection sometimes causes breakage when unscrewing, and the broken threaded portion 1 remains in the home tie 6.
6 makes it impossible to reuse the home tie 6.

Note that the home tie rotary tool 1 of the present invention can be used to unthread home ties provided in various frameworks such as the framework 13 for forming the foundation of a house, for example, a framework for forming a concrete wall. In addition, the home tie rotary tool 1 can also be used for screwing the home tie 6.

Another embodiment of the separator 12 is shown in FIG.

In this example, the separator 12 includes a cylindrical body 50 that is passed between the form panels 11 and 11, and a flange portion at one end of the base shaft passing through the inner hole 50A of the cylindrical body 50 and the insertion hole 15 of the form panel 11. 51A and a connecting shaft 51 having a threaded portion 16 screwed into the home tie 6 at the other end.
The number of used has been halved.

〔Effect of the invention〕

The home tie rotating tool of the present invention uses a right-angle transmission mechanism, and the locking shaft for inserting the home tie and the rotating shaft connected to the rotary machine are linked at right angles, so that the home tie cannot be unscrewed. It has good operability and can be done easily and conveniently,
Demolition work efficiency can be greatly improved.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing one embodiment of the present invention, Fig. 2 is a cross-sectional view thereof, Fig. 3 is an exploded perspective view thereof, Fig. 4 is a perspective view showing its usage state, and Fig. 5 is a home tie. 6 is a sectional view showing an example of the mounting means of the rotating machine, and FIGS. FIG. 8 is a sectional view showing another embodiment of the separator, and FIG. 9 is a perspective view illustrating the prior art. 2-rotating shaft, 3... body, 5... housing, 6
- Home tie, 7 - Locking shaft, 9 - Right angle transmission mechanism, 10 - Rotating machine, 11 - Formwork panel, 12 - Separator, 16 - Threaded part,
42-- Hole portion, 45- Connection portion, 46-- Drive shaft. Patent applicant Meiji Kikai Seisakusho Co., Ltd. Agent
Patent Attorney Tadashi Naemura $5111 6B Sei 61! l sB country

Claims (1)

[Claims] 1 A home tie rotary tool that can separate formwork panels and screws off a home tie that is screwed into the threaded part of a separator that protrudes outside the formwork panel, and has a housing at one end of the body that supports the rotating shaft. and a rotating machine for driving the rotating shaft is attached to the other end of the body, and a locking shaft having a hole into which the home tie can be inserted and which matches the shape of the home tie is attached to the housing. A home tie rotary tool that is pivoted at right angles to the longitudinal direction and in which the rotating shaft and the locking shaft are linked by a right-angle transmission mechanism.