JP2012135861A - Screw fastening device of screw reinforcing bar joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a powered screw fastening device that reduces labor and improves workability.SOLUTION: A lever type lock mechanism making a holder case 17 not openable when closing an opening and closing mechanism is arranged by fastening the lower end of a rotary shaft guide pipe 6 to the upper part of which a pipe handle 1, an opening and closing lever guide pipe 2, a lock lever guide pipe 4 are secured to the upper part of the body case 7, rotatably securing a rotary shaft 10 to the upper end of which hexagonal bar 8 is secured and to the upper side surface of which a rotary shaft handle 9 is secured, fastening a worm gear A13 to the rotary shaft 10 in the body case 7, securing the warm gear A13 and the worm gear B14 so as to mesh with each other and such that a fastening ring 15 to which the worm gear B14 is secured can freely turn along the groove of a guide base ring 16, and making a halved fastening ring 15 and the guide base ring 16 openable and closable by a lever type opening and closing mechanism.

Description

  The present invention relates to a screw fastener for a joint when screw joints are connected by a joint.

Reinforcing bars used for high-rise buildings and the like are generally rebars called threaded joints with screw threads. It may be necessary to connect and use this rebar, and it is connected by a joint with threads on the inside. There are hexagonal and decagonal parts on the outside of the joint, and a wrench is tightened to connect them.
However, depending on the condition of the threaded joint of the reinforcing bar and the screw of the joint, it may not be suitable and may require a lot of force, and it may be difficult and time consuming to use a spanner when working in a narrow high place. is there.

When connecting a threaded bar using a joint, connecting with a spanner is labor intensive and time consuming.
Therefore, the present invention provides a screw fastener for a threaded joint of a threaded joint that reduces labor and increases work efficiency by tightening with power.

The lower end of the rotary shaft guide pipe with the pipe handle, open / close lever guide pipe and lock lever guide pipe attached to the upper part is fastened to the upper part of the main body case. Insert a rotary shaft with a hexagonal bar at the upper end and a rotary shaft handle at the upper side into the rotary shaft guide pipe, and attach it to the lower end of the main body case with bearings and rotary shaft setscrews. Tighten worm gear A. The fastening ring to which the worm gear B is attached is attached so that the worm gear A and the worm gear B mesh with each other so as to be rotatable along the groove of the guide base ring fastened in the main body case and the holder case. The guide base ring, fastening ring and worm gear B housed in the holder case and the guide base ring, fastening ring and worm gear B housed in the main body case are split in half, and this is a lever-type opening and closing. It is a screw fastener for a threaded bar joint that is provided with a lever-type locking mechanism that can be opened and closed by a mechanism and prevents the holder case from opening when the opening and closing mechanism is closed.
In the lever-type opening / closing mechanism, an opening / closing lever with an opening / closing lever handle attached to the upper end is inserted into the opening / closing lever guide pipe, and the opening / closing joint A is swingably connected to the tip of the opening / closing lever A. Are connected by a joint set screw A so as to be swingable. The tip of the open / close joint B is fastened to the lower part of the holder case, the middle part of the open / close joint B is attached to the rib at the bottom of the main body case with the joint set screw B, and the open / close joint B swings around the joint set screw B The holder case closes when the open / close lever handle is lowered, and the holder case opens when the open / close lever handle is raised.
The lever-type lock mechanism has a lock lever with a lock lever handle attached at the upper end inserted through the lock lever guide pipe, and a lock plate attached to the lower end of the lock lever so as to be swingable. Attach the lock plate to the body case so that it can swing with the lock plate set screw. When a lock pin is attached to the holder case and the lock lever handle is raised, the lock plate swings and locks into the lock pin groove provided at the bottom of the lock plate. When it is lowered, the lock is released.

Traditionally, the joints that connect the threaded bars were wrenched with a wrench, but it took time and effort. By tightening this with power using the present invention, labor can be reduced and work efficiency can be improved.
The work time is reduced from one third to one quarter compared to manual work.

The figure which shows the closed state of this invention (partially broken view) The figure which shows the open state of this invention Exploded sectional view of the rotating part in the main body case and the holder case Diagram showing screw joints and joints

The structure of the present invention will be described with reference to FIG.
The lower end of the rotating shaft guide pipe (6) having the pipe handle (1), the open / close lever guide pipe (2) and the lock lever guide pipe (4) attached to the upper part is fastened to the upper part of the body case (7). A rotating shaft (10) having a hexagonal bar (8) attached to the upper end and a rotating shaft handle (9) attached to the upper side surface is inserted into the rotating shaft guide pipe (6), and a bearing (11) is inserted into the lower end of the body case (7). And it attaches rotatably with a rotating shaft set screw (12), and fastens the worm gear A (13) to the rotating shaft (10) in a main body case (7). The fastening ring (15) to which the worm gear B (14) is attached is attached so as to be rotatable along the groove of the guide base ring (16) fastened in the body case (7) and the holder case (17). The worm gear A (13) and the worm gear B (14) are attached so as to mesh with each other. Worm gear B (14), fastening ring (15) and guide base ring (16) housed in the holder case (17), and worm gear B (14) and fastening ring housed in the body case (7) (15) and the guide base ring (16) are halved and are opened and closed by a lever-type opening / closing mechanism so that the holder case (17) does not open when the opening / closing mechanism is closed. A locking mechanism is provided.
In the lever-type opening / closing mechanism, an opening / closing lever (19) having an opening / closing lever handle (18) attached to the upper end is inserted into the opening / closing lever guide pipe (2), and the opening / closing joint A (20) is swung to the end. Further, the open / close joint B (21) is connected to the tip of the open / close joint B (21) so as to be swingable by the joint set screw A (22). The tip of the open / close joint B (21) is fastened to the lower part of the holder case (17), and the intermediate part of the open / close joint B (21) is connected to the rib (7a) at the lower part of the body case (7) with the joint set screw B (23 ), The open / close joint B (21) swings around the joint set screw B (23), and when the open / close lever handle (18) is lowered, the holder case (17) is closed and the open / close lever handle ( When the 18) is raised, the holder case (17) opens. (See Figure 2)
The lever-type locking mechanism is capable of inserting a lock lever (25) with a lock lever handle (24) at its upper end into the lock lever guide pipe (4), and swinging the lock plate (26) at its lower end. Install to. The lock plate (26) is attached to the body case (7) so as to be swingable by a lock plate set screw (27). A lock pin (28) is attached to the holder case (17) side, and when the lock lever handle (24) is raised, the lock plate (26) swings around the lock plate set screw (27) to lock the lock pin. When the lock pin (28) is fitted and locked in the groove (26a), and the lock lever handle (24) is lowered, the lock pin groove (26a) is released from the lock pin (28) and the lock is released. (See Figure 2)
In order to ensure that the holder case (17) of the opening / closing mechanism is opened or closed, the opening / closing lever set screw (3) is tightened to fix the opening / closing lever (19).
Similarly, in order to ensure that the lock mechanism is locked or released, the lock lever set screw (5) is tightened to fix the lock lever (25).

Although this invention can also be made into a manual type by turning a rotating shaft handle (9) by hand, when using it in order to tighten a coupling (30), it is more efficient to use an electric type with an electric drill.
When the rotary shaft (10) rotates, the worm gear A (13) attached coaxially rotates, and the worm gear B (14) engaged therewith rotates. That is, when the rotating shaft (10) is rotated, the worm gear A (13) is rotated horizontally, and converted into vertical rotation by the worm gear B (14) meshed therewith. The appropriate rotation ratio between worm gear A (13) and worm gear B (14) seems to be about 40: 1.
The worm gear B (14) is fastened to the fastening ring (15), and the flange (15a) of the fastening ring (15) is fitted into the guide groove (16a) of the guide base ring (16). 14) and the fastening ring (15) rotate along the guide groove (16a) of the guide base ring (16). (See Figure 3)
The inner angle of the fastening ring (15) is 10 and corresponds to the angle of the joint (30).

When using the present invention, first, the rotary shaft handle (9) is turned by hand so that the split surfaces of the worm gear B (14) and the fastening ring (15) in the main body case (7) and the holder case (17) are removed. The position is adjusted to be the same as each end face of the main body case (7) and the holder case (17).
Next, the lock lever handle (24) is lowered to release the lock, and the open / close lever handle (18) is raised to open the holder case (17).
With the holder case (17) open, the holder case (17) is brought under the joint (30) attached to the reinforcing bar (29), and the opening / closing lever handle (18) is lowered to close the holder case (17). Then raise the lock lever handle (24) to lock. In this state, the open / close lever set screw (3) and the lock lever set screw (5) are tightened.
When the hexagonal bar (8) is added in the forward direction with an electric drill, the joint (30) fits into the reinforcing bar (29). When it is desired to remove the joint (30) from the reinforcing bar (29), the rotation of the electric drill is reversed.
When the joint (30) is tightened with an electric drill, the work time is reduced from one-third to one-fourth compared to manual work, and labor is also reduced.

DESCRIPTION OF SYMBOLS 1 Pipe handle 2 Open / close lever guide pipe 3 Open / close lever set screw 4 Lock lever guide pipe 5 Lock lever set screw 6 Rotating shaft guide pipe 7 Body case 7a Rib 8 Hexagon stick 9 Rotating shaft handle 10 Rotating shaft 11 Bearing 12 Rotating shaft set screw 13 Worm Gear A
14 Worm Gear B
15 Fastening ring 15a Flange 16 Guide base ring 16a Guide groove 17 Holder case 18 Open / close lever handle 19 Open / close lever 20 Open / close joint A
21 Opening and closing joint B
22 Joint set screw A
23 Joint set screw B
24 Lock lever handle 25 Lock lever 26 Lock plate 26a Lock pin groove 27 Lock plate set screw 28 Lock pin 29 Reinforcing bar 30 Joint

Claims (3)

  Connect the lower end of the rotating shaft guide pipe with the pipe handle, open / close lever guide pipe and lock lever guide pipe to the upper part of the main body case, and connect the rotating shaft with the hexagonal bar on the upper end and the rotating shaft handle on the upper side, A fastening ring that is inserted into the rotating shaft guide pipe and is rotatably attached to the lower end of the main body case with a bearing and a rotating shaft set screw, and worm gear A is fastened to the rotating shaft in the main body case and worm gear B is attached. The worm gear A and the worm gear B are mounted so as to be rotatable along the groove of the guide base ring fastened in the main body case and the holder case so that the worm gear A and the worm gear B are engaged with each other. Gear B, tightening ring and guide base ring, and worm gear B, tightening ring housed in the body case The screw base is divided into half and the guide base ring. The screw base is provided with a lever-type locking mechanism that can be opened and closed by a lever-type opening / closing mechanism and prevents the holder case from opening when the opening / closing mechanism is closed. Screw fastener for rebar joint.   The lever-type opening / closing mechanism according to claim 1 is configured such that an opening / closing lever having an opening / closing lever handle attached to an upper end is inserted into an opening / closing lever guide pipe, and an opening / closing joint A is pivotably connected to the tip of the opening / closing lever A. First, the open / close joint B is swingably connected by the joint set screw A, the tip of the open / close joint B is fastened to the lower part of the holder case, and the middle part of the open / close joint B is connected to the rib on the lower part of the main body case with the joint set screw B. The opening / closing joint B swings about the joint set screw B, the holder case is closed when the opening / closing lever is lowered, and the holder case is opened when the opening / closing lever is raised.   The lever-type lock mechanism according to claim 1 is configured such that a lock lever having a lock lever handle attached to an upper end is inserted into a lock lever guide pipe and a lock plate is swingably attached to a lower end of the lock lever. A lock pin is attached to the holder case side so that it can swing, and when the lock lever is raised, the lock plate swings and the lock pin is inserted into the lock pin groove provided below it. It is a mechanism that is locked by fitting and unlocked when the lock lever is lowered.

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