JP2508453Y2 - Construction battlement bolt automatic tightening device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction battlement plate bolt automatic tightening device.

[0002]

2. Description of the Related Art Battledore bolts for construction are widely used in wooden construction for joining and fixing pillars h1 and beams h2, as shown in FIG. More specifically, the construction battlement plate bolt b has a plate portion b1 and a male screw portion b2 extending from the plate portion b1. This plate portion b1 is screwed to the beam h2.
It is fixed by a nail k or the like, the male screw part b2 penetrates the column h1, and a nut n is screwed to the tip of the male screw part b2 via a washer j and tightened. By this tightening, the pillar h1 and the beam h2 are fixed, but since the pillar and the beam are made of wood, this fixing becomes extremely incomplete due to the contraction of the wood. I will end up. That is, when joining the pillar h1 and the beam h2, no matter how complete the tightening of the nut n is, or even if the nut n having a function of a rotation stop is used, the timber Drying progresses, pillar h1
And the beam h2 shrink, the nut n, the pillar h1, the beam h
A gap is created between the two, and the nut n does not press the pillar h1 and is in a state of not performing the tightening function at all. That is, a nut having a normal anti-rotation function prevents rotation of the nut with respect to the bolt. However, in the case of a battledore bolt for construction, the thickness of an object to be fastened such as a pillar h1 or a beam h2 is Since it is decreasing, even if the rotation of the nut with respect to the bolt is prevented, no problem is solved. Therefore, conscientious builders re-tighten the nut n, but many do not re-tighten, and this re-tightening can be done until the building is completed. The situation is that there is no way to deal with the shrinkage of wood after construction is complete.

[0003]

SUMMARY OF THE INVENTION Therefore, according to the present invention, by automatically tightening nuts, even if contraction of wood occurs, it is possible to always maintain a reliable joining state. The purpose is to provide a tightening device.

[0004]

The present invention achieves the above object by the following means. 1 is a block diagram showing a rotor for a rotor according to an embodiment of the present invention; and a casing 2 for receiving the rotor so as to be rotatable and axially slidable, and arranged between the rotor and the casing. And a spring 3 that applies a rotational force to the rotor. This rotor 1
Has an engaging portion 11 that receives and engages a nut n screwed to the battledore bolt b or the like. The casing 2 has a driving fixing means 22 such as a needle on the tip side thereof. Further, rotation preventing means 12 and 24 for engaging with the rotor 1 on the tip end side of the casing 2 to make the rotor 1 non-rotatable are provided in the rotor and the casing. And rotor 1
Is the spring 3 when sliding to the base end side of the casing 2.
It is rotated by the bias of.

[0005]

When the nut n is received and engaged with the engaging portion 11 of the rotor 1 and the base end side of the casing 2 is hit with a hammer or the like, the casing 2 moves forward from the state of FIG. 1 to the left. ,
The driving fixing means 22 such as the needle bites into the pillar h1,
The casing 2 is fixed to the pillar h1 (FIG. 8). On the other hand, the rotor 1 is engaged with the nut n and does not move any further. Therefore, the rotor 1 slides relatively to the base end side of the casing 2, the detent means 12 and 24 are disengaged, and the rotor 1 becomes rotatable. Therefore, the spring force of the spring 3 is applied to the rotor 1 and the nut n engaged with the rotor 1, and the nut n is always applied with a force in the tightening direction. When the wood dries and the gap between the nut n and the pillar h1 opens, the force of the spring 3 causes the nut n to rotate and maintain the tightened state between the nut n and the pillar h1. .

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a cross-sectional view of a construction battlement plate bolt automatic tightening device according to an embodiment of the present invention, FIG. 2 is a perspective view thereof, FIG. 3 is a perspective view of a rotor of the device, and FIG. 4 is IV- of FIG. IV line end view, FIG. 5 is a VV line end view of FIG. 1, FIG. 6 is a VI-VI line end view of FIG. 1, FIG. 7 is a perspective view of a washer used in the same device, and FIG. 8 is the same device. It is sectional drawing of the usage state of.

The construction battlement plate bolt automatic tightening device of this embodiment includes a rotor 1, a casing 2 for accommodating the rotor 1, and a spring 3 arranged between the rotor 1 and the casing 2. With.

The rotor 1 has a cylindrical shape and receives the nut n inside the cylinder, and has a large number of engaging portions 11 on the inner wall surface of the cylinder. The engaging portion 11 may be formed in a hexagonal hole shape so as to correspond to a hexagonal nut, but in this embodiment, a large number of corner portions are formed so that the hexagonal nut can be easily engaged. There is. As shown in FIGS. 3 and 4, a pair of detent protrusions 12 are formed on the outer peripheral surface of the base end portion of the rotor 1. Further, as shown in FIGS. 3 and 5, a pair of retaining protrusions 13 are formed on the outer peripheral surface of the rotor 1 near the base end. This retaining protrusion 1
3 has the same shape as the above-mentioned rotation stop projection 12, but is provided at a position displaced by 90 degrees in the circumferential direction from the rotation stop projection 12. Further, a rotor-side locking groove 14 for locking the spring 3 is formed on the outer peripheral surface near the tip of the rotor 1.

Next, the casing 2 is made of a cylindrical body which receives the rotor 1 so as to be rotatable and axially slidable. At the tip of the casing 2, there is provided a tip-side overhanging portion 21 that juts out in the radial direction, and an appropriate number of needle-shaped fixing projections 22 project from the tip end surface of the tip-side overhanging portion 21. ing. The base end of the casing 2 has a base end side protruding portion 23 protruding in the radial inward direction, and the base end side protruding portion 23 has a rotation stopping protrusion 12 and A rotation preventing recess 24 into which the retaining projection 13 can be fitted is formed (see FIG. 4). Further, as shown in FIGS. 1 and 6, a casing-side locking groove 25 for locking the spring 3 is formed on the inner peripheral surface of the casing 2 near the tip. The casing-side locking groove 25 is formed rearwardly longer than the rotor-side locking groove 14.

Next, as the spring 3, a spiral spring in which a leaf spring is spirally wound, as shown in FIG. 6, is used. The outer peripheral end 32 is inserted into the casing-side locking groove 25.

An assembling method of the construction battlement plate bolt automatic tightening device of the embodiment comprising the above respective parts will be described. First, in a state where the inner peripheral end 31 of the spring 3 is inserted into the rotor side engaging groove 14. , Wind the mainspring and shrink it. As a result, the spring 3 is tightly wound around the outer circumference of the rotor 1.

Next, the rotor 1 is inserted from the base end of the casing 2. At the time of this insertion, since the spring 3 is tightly wound around the outer periphery of the rotor 1, the spring 3
Can be inserted inward from the base end side overhanging portion 23 while being wound around the rotor 1. Next, the retainer protrusion 13 of the rotor 1 is placed at the position of the rotation stopper recess 24 formed in the base-side protruding portion 23.
When it is passed through by aligning and the insertion is further advanced, the rotation preventing projection 12 of the rotor 1 comes into contact with the base end side overhanging portion 23 of the casing 2. In this state, the spring 3 is located in the space between the rotor 1 and the casing 2, and in this space, the spring 3 is slightly wound to form a diametrical expansion, and the outer peripheral end 32 of the inner peripheral surface of the casing 2 extends. Move by rubbing. On the other hand, since the casing side engaging groove 25 is formed on the inner peripheral surface of the casing 2, the outer peripheral end 32 of the spring 3 is engaged with the casing side engaging groove 25, and the loosening of the spring 3 is also stopped. . Finally, the rotor 1 is rotated 90 degrees from the state in which the detent protrusion 12 of the rotor 1 is in contact with the base-side protruding portion 23 of the casing 2 to form the base-side protruding portion 23. Anti-rotation recess 24
The anti-rotation protrusion 12 of the rotor 1 is aligned and inserted into the position of (1) to bring the anti-rotation protrusion 12 into engagement with the anti-rotation recess 24 (FIGS. 1 and 4). As a result, the rotor 1 is non-rotatably arranged in the casing 2, and is maintained in a state in which a clockwise force is applied by the spring 3.

Next, the usage state of this device will be described. Since the structures of the pillars h1, the beams h2, the battledore bolts b, and the nuts n are substantially the same as those of the conventional technique, detailed description thereof will be omitted. This construction battlement plate bolt automatic tightening device is used while being fixed to the pillar h1 while being engaged with the nut n. This fixing may be carried out by driving the fixing projections 22 of the casing 2 into the pillars h1.
And it is preferable to use a washer 4 as shown in FIG. This washer 4 has a male screw insertion hole 41 for inserting the male screw portion b2 of the bolt in the center, and a projection insertion hole 42 around which the fixing protrusion 22 can be inserted.

In use, the male screw insertion hole 41 of the washer 4 is inserted into the male screw portion b2 of the battledore plate bolt. Next, the nut n is screwed into the male screw part b2 and tightened.
Next, the nut n is engaged with the engaging portion 11 inside the cylinder of the rotor 1 and inserted, and the fixing projection 22 of the casing 2 is inserted.
Is inserted into the projection insertion hole 42 of the washer. In this state, the base end side of the casing 2 is hit with a hammer or the like. At this time, since the base end of the rotor 1 should not be hit, it is also preferable to use the auxiliary tool k as shown in FIG.

When the base end side of the casing 2 is hit with a hammer or the like, the casing 2 advances to the left in the drawing, the fixing projection 22 thereof bites into the pillar h1, and the casing 2 is fixed to the pillar h1. On the other hand, the rotor 1 is engaged with the nut n and does not move any further. Therefore, the detent recess 24 of the casing 2 moves away from the detent protrusion 12 of the rotor 1 and advances to be positioned between the detent protrusion 12 and the retainer protrusion 13. At this time, since the casing-side locking groove 25 for locking the spring 3 is extended rearward, the outer peripheral end 32 of the spring 3 slides in the casing-side locking groove 25. It will stop and this lock will not disengage. Thus, the spring force of the spring 3 is applied to the rotor 1 and the nut n engaged with the rotor 1. The direction of this spring force is clockwise, that is, the nut n
Since it is the direction in which the nut is tightened, the force in the tightening direction is always applied to the nut n.

Then, after a lapse of days, the wood is dried,
When the gap between the nut n and the pillar h1 becomes wider, the force of the spring 3 causes the nut n to rotate, and the tightened state between the nut n and the pillar h1 is maintained. In the case of the mainspring spring of this embodiment, the rotation of the nut n is such that the nut n can be rotated about 3 rotations, and it can sufficiently cope with the progress of drying of wood. The number of rotations can be changed appropriately according to the shape and size of the spring 3.

As described above, the present invention can be carried out by appropriately modifying it in addition to the above-described embodiment. For example, the spring 3 has a spiral spring shape using a plate material and a coil spring shape using a wire material. You can change it to something.
Further, the whirl-stop projection 12 and the slip-off prevention projection 13 can be formed by inserting a pin into the rotor 1.
Further, the rotor 1 may be inserted from the front end side of the casing without providing the front end side protruding portion 21 at the front end of the casing 2. Further, extend the base end of the casing 2,
The base end of the rotor 1 may be inserted into the casing 2 before the driving.

[0018]

As described above, according to the present invention, since the nut is automatically tightened, even if the wood shrinks, a stable battledore bolt for construction can be always maintained. It was possible to provide a tightening device.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a construction battlement plate bolt automatic tightening device according to an embodiment of the present invention.

FIG. 2 is a perspective view of the same.

FIG. 3 is a perspective view of a rotor of the device.

4 is an end view taken along line IV-IV in FIG.

5 is an end view taken along line VV of FIG.

FIG. 6 is an end view taken along the line VI-VI of FIG.

FIG. 7 is a perspective view of a washer used in the device.

FIG. 8 is a cross-sectional view of the device in use.

FIG. 9 is an explanatory view of a usage state of a conventional construction battledore bolt.

[Explanation of Codes] 1 ... Rotor 2 ... Casing 3 ... Spring 11 ... Engagement portion 12 ... Rotation stop projection (rotation stop means) 22 ... Fixing projection (drive-in fixing means) 24 ... Rotation stop recess (rotation stop means) )

Claims (1)

(57) [Scope of utility model registration request] 1. A rotor (1), a casing (2) for rotatably and slidably receiving the rotor, and a rotor arranged between the rotor and the casing. And a spring (3) for applying a rotational force by means of which the rotor (1) receives and engages the nut (n) screwed into the battledore bolt (b) etc. This casing (2) has a means for driving the needle etc. into the tip side.
(22), a detent means (12) (24) for engaging with the rotor (1) on the tip side of the casing (2) to make the rotor (1) non-rotatable
Is provided on the rotor and the casing, and is rotated by the biasing force of the spring (3) when the rotor (1) slides on the base end side of the casing (2). Attached device.