KR20090072909A - Screw tightening mechanism and temporary assembly fitting device for consrtuction site using the same - Google Patents

Abstract

A screw fastening mechanism and a temporary assembly fitting device for construction using the same are provided to prevent a nut from being separated from the end of a mounting blot although the nut is loosened by using tools including an impact wrench and minimize damage to the nut in repeatedly use. As to a temporary assembly fitting device for construction using a screw fastening mechanism, a clamp fitting device(10) comprises: a fixed housing member(16) connecting first and second clamp mechanisms(11,12) through four rivets(13) at a right angle and having a concave part(15) coinciding with the contact surface of a pipe(14), which is an installed object, on the inner side; a movable housing member(18) being connected to the base part of the fixed housing member through a pin(17) to be rotated; a mounting bolt(20) being mounted on the tip-end of the fixed housing member a pin(19); and a nut(21) screwed in the mounting bolt. The screw fastening mechanism is composed of the mounting bolt and the nut.

Description

SCREW TIGHTENING MECHANISM AND TEMPORARY ASSEMBLY FITTING DEVICE FOR CONSRTUCTION SITE USING THE SAME}

The present invention can be optimally used when loosening a nut screwed to a male screw (bolt) provided in a machine or a machine used in a building site, a civil engineering site, a factory, etc. with an impact wrench (or an electric nut rotating device). It relates to a screw fastening mechanism and a temporary assembly fitting device for construction (for example, a clamp fitting device) using the screw fastening mechanism.

For example, an assembly suspension scaffold used in a construction site or the like is rotatably connected to a pipe member constituting a post or a beam, as described in Japanese Patent Laid-Open No. 2004-27781. A clamp fitting device (an example of a temporary assembly fitting device for construction) provided with a pair of clamp mechanisms is assembled by vertically and horizontally connecting. The clamp mechanism includes a stationary receiving member having a semicircular arc-shaped recess into which a pipe is inserted, a movable receiving member having a semicircular arc-shaped recess rotatably connected to a base portion of the stationary receiving member via a pin, and a stationary receiving member. It has a mounting bolt and a nut rotatably connected to the base of the base through a pin.

In the use of the clamp fitting device, the clamp fitting device is fixed to the pipe by fastening the distal ends of the fixed receiving member and the movable receiving member with mounting bolts and nuts while the pipe is held between the fixed receiving member and the movable receiving member. Doing. The nut screwed to the mounting bolt is difficult to loosen from the mounting bolt when loosened with an impact wrench. Thus, for example, as described in Japanese Utility Model Registration No. 3137695, the end of the mounting bolt is usually scratched. It was provided with the anti-loosening part, and the nut was not structured anymore.

However, even if the end of the bolt is provided with an anti-loosening part, if the nut is repeatedly loosened with an impact wrench, the anti-loosening portion is incapacitated and the nut is released from the mounting bolt, or the female thread of the nut is deformed, which may interfere with the fastening of the nut. There was a problem such as.

This invention is made | formed in view of such a situation, and even if it loosens a nut using a tool, such as an impact wrench, the screw fastening mechanism and this screw which do not remove a nut from the end part of a mounting bolt, and there is little damage of a nut even if used repeatedly. An object of the present invention is to provide a temporary assembly fitting device for building using a fastening mechanism.

The screw fastening mechanism which concerns on the 1st invention which concerns on the said objective is a screw fastening mechanism which has a mounting bolt in which a male screw part was formed, and the nut screwed to the said male screw part,

An anti-separation stopper for preventing detachment of the nut at an open end of the mounting bolt, and a diameter between the anti-separation stopper and the male screw portion, the diameter of which is equal to or less than the internal diameter of the female screw of the nut, and at least the screw length of the female screw. A non-screw part having a was provided.

In the screw fastening mechanism which concerns on 1st invention, it is preferable that the said separation prevention stopper is an annular part whose diameter is larger than the internal diameter of the said female screw, and whose diameter is smaller than the external dimension of the said nut. In this case, when the recessed portion is formed at the distal end of the mounting bolt in accordance with the shaft center, the formation of the stopper for separation prevention becomes easy.

In the screw fastening mechanism which concerns on 1st invention, it is preferable that a mounting part is formed in the base end of the said mounting bolt, and the said external thread part is provided in front of the said mounting part. This mounting portion is a pin housing portion integrally provided at the proximal end of the mounting bolt, and the axis of the pin housing portion and the shaft of the mounting bolt are preferably orthogonal to each other.

In addition, the fitting apparatus to which the screw fastening mechanism which concerns on 1st invention is applied is not limited to the clamp fitting apparatus which connects a pipe only, For example, in a building site, a civil engineering site, a normal factory, etc., It can also be applied to a connection fitting device for connecting to a post or the like, a fitting device for temporarily fixing an object, and the like.

And the temporary assembly fitting apparatus for building which concerns on 2nd invention is a temporary assembly fitting apparatus for building using the screw fastening mechanism which concerns on 1st invention,

A fixed receiving member having a concave portion inwardly corresponding to the outer surface of the pipe to be mounted, and a proximal end thereof rotatably connected to the proximal end of the fixed receiving member through a pin, and a nut receiving sheet formed at the distal end thereof so that A movable receiving member having a corresponding recessed portion therein;

The pin receiving portion of the mounting bolt is rotatably mounted to the distal end of the fixing receiving member through the pin, and the distal end of the mounting bolt is mounted to the nut receiving seat, and fixed by the nut screwed to the mounting bolt. A clamping mechanism for fastening the pipe sandwiched by the receiving member and the movable receiving member was used.

The screw fastening mechanism which concerns on 1st invention is provided with the release prevention stopper which prevents the nut from detaching in the opening side front end part of a mounting bolt, The diameter is less than the internal diameter of the female screw of a nut, between a release prevention stopper and a male thread part, Since a non-threaded part having a thread length of a female thread is provided, the nut is located in the non-threaded part when the nut is released from the screwed state with the male threaded part. I never do that. Therefore, there is no possibility that the nut may disable the release preventing stopper, and the nut is not damaged by the release preventing stopper.

In the screw fastening mechanism according to the first aspect of the present invention, when the release preventing stopper is an annular portion having a diameter larger than the inner diameter of the female screw and smaller in diameter than the outer dimension of the nut, the nut does not deviate from the distal end of the mounting bolt. Do not.

Moreover, in the screw fastening mechanism which concerns on 1st invention, a mounting part is a pin accommodating part integrally provided in the base end part of a mounting bolt, and when a shaft center of a pin accommodating part and an axis of a mounting bolt orthogonally cross, a mounting bolt is taken as an example. For example, it can be rotatably attached to the front-end | tip of the fixed accommodation member of the temporary construction fitting device for buildings through a pin.

And the temporary assembly fitting apparatus for building which concerns on 2nd invention is a temporary assembly fitting apparatus for building which used the screw fastening mechanism which concerns on 1st invention, The fixed accommodation member which has a recessed part corresponding to the outer surface of the pipe which is a mounting object in an inside, and A proximal end thereof is rotatably connected to the proximal end of the stationary receiving member via a pin, and a nut receiving sheet is formed at the proximal end, and has a movable receiving member having a recess inwardly corresponding to the outer surface of the pipe, and the proximal end of the stationary receiving member. The pin receiving portion of the mounting bolt is rotatably mounted through the pin, and the tip of the mounting bolt is mounted on the nut receiving seat, and the fastening of the pipe clamped by the fixed receiving member and the movable receiving member by a nut screwed to the mounting bolt. Since the clamp mechanism is used to loosen the nut using an impact wrench, the nut Not departing from the tips of the mounting bolts. Thus, the temporary assembly fitting device for construction can be stored and transported while the nut is always attached to the mounting bolt.

Next, the Example which actualized this invention is described, referring an accompanying drawing, and it makes an understanding of this invention easy.

1 is a side view of a clamp fitting device using a screw fastening mechanism according to an embodiment of the present invention, and FIG. 2A is a side view of a mounting bolt used in the clamp fitting device, and (B) is a mounting view thereof. It is a top view of a bolt, FIG.3 (A) and (B) are explanatory drawing which shows the manufacturing method of this mounting bolt, FIG.4 (A) is a front view of the nut used for this clamp fitting apparatus, (B) Is a plan view, (C) is an enlarged side cross-sectional view.

As shown in FIG. 1, the clamp fitting apparatus 10 which is an example of the temporary assembly fitting apparatus for building using the screw fastening mechanism which concerns on one Embodiment of this invention is the 1st, 2nd clamp mechanism arrange | positioned in the state which turned back. The four rivets 13 are connected to each other in an orthogonal state. Since the first and second clamp mechanisms 11 and 12 have the same structure, only the first clamp mechanism 11 will be described in detail below, and the second clamp mechanism 12 will be given the same number if necessary. Explain.

The 1st clamp mechanism 11 has the concave part 15 and the fixed accommodating member 16 which have inside the recessed part 15 substantially corresponded to the contact surface (outer surface) of the pipe 14 which is an example of a mounting object. Movable receiving member 18 rotatably connected to a proximal end of the movable receiving member 18 via a pin (rivet pin) 17, and a mounting bolt rotatably mounted to the distal end of the fixed receiving member 16 via a pin (rivet pin) 19. (20) and the mounting bolt (20) which has a nut (21) screwed to the mounting bolt (20) and fastens the pipe (14) clamped by the fixed receiving member (16) and the movable receiving member (18). And the nut 21. Hereinafter, these are demonstrated in detail. The screw fastening mechanism is configured with the mounting bolt 20 and the nut 21.

The fixed housing member 16 is formed by bending a steel plate cut into a predetermined shape by press working, and has a main panel portion 22 having a V-shaped cross section and side plate portions 23 bent on both sides thereof, An approximately semicircular concave portion 15 is formed inside the side plate portion 23. The movable receiving member 18 is rotatably connected to the base end of the fixed receiving member 16 via the pin 17. The movable accommodating member 18 also has the main panel part 25 which bend | folded the steel plate cut | disconnected to the predetermined shape by press work, and has two sets of leaf in the center, and the pin (both sides of the base end part of the main panel part 25) The connecting portion 26 into which the 17 is inserted is bent.

In front of the main panel portion 25, a sheet portion (an example of a nut receiving sheet) 27 having a U-shaped cutout portion into which the distal end portion of the mounting bolt 20 is inserted is formed. The sheet portion 27 was molded into a cross-sectional groove shape at the tip end of the main panel portion 25 so as to have sufficient strength. An arc-shaped recess 28 in contact with the pipe 14 is formed inside the main panel portion 25.

The mounting bolts 20 are shown in detail in FIGS. 2A and 2B, and the pin receiving portion (an example of the mounting portion) 30 is provided at the base portion such that the shaft core is perpendicular to the shaft core of the mounting bolt 20. The pin receiving portion 30 is provided with a male screw portion 32 (W 7/16 screws are used in this embodiment) via a rod 31. A non-threaded portion is provided in front of the male screw portion 32. (33) (In this embodiment, the diameter d is about 9 to 9.4 mm.), The separation prevention stopper 34 is provided. The non-threaded portion 33 has a diameter d smaller than (or less than) the inner diameter a of the female screw 35 of the nut 21, as shown in Fig. 4C, and the nut ( 2 l) is 1.01 to 1.4 times the length (axial length) of the total length (thread length) b of the female screw 35, and has at least the total length of the female screw 35. Therefore, when the nut 21 is located in the non-screw portion 33, the nut 21 is idling and does not generate a propulsion force.

The separation prevention stopper 34 provided in the open side front end of the mounting bolt 20 is an annular part which enlarged the diameter of the front end of the mounting bolt 20. The diameter of this annular part is larger than the internal diameter (exactly a corrugation diameter) of the female screw 35, and is smaller than the external dimension (distance c between cross-sections of which the hexagon is a cross section) of the nut 2l. The outer diameter of the annular portion is preferably in the range of 1.15 to 1.3 times the diameter d of the non-threaded portion 33. In this embodiment, an annular cutout portion 37 is provided at the front of the nut 21 to insert the release preventing stopper 34 formed of the annular portion formed at the tip of the mounting bolt 20 into the cutout portion 37. It is supposed to be.

As shown in Figs. 3A and 3B, a round hole 38 (groove) is formed in the center of the tip end portion of the mounting bolt 20, but this is a round hole when the diameter of the annular portion is increased. It is for inserting the punch for diameter expansion into 38, and an annular part is formed smoothly by this. And the length of the annular portion is about 1 to 2 mm in this embodiment.

In this embodiment, although the annular portion is used as the stopper for preventing separation, for example, an assembly of circular arc portions divided into a plurality in the circumferential direction may be used.

The nut 2l screwed to the male screw portion 32 will be described with reference to FIGS. 4A to 4C. A flange 40 is integrally provided on one side of the nut 21, and a cutout 37 is formed inside the other side of the nut 21 as described above. By providing the flange 40, use of a plate washer or the like can be omitted, and the nut 21 has a larger area so that the seat portion 27 in which the U-shaped groove of the movable receiving member 18 is formed is formed. It is possible to contact evenly.

Moreover, by providing the notch 37 inside the other side of the nut 21, when the nut 21 contacts the stopper 34 for anti-separation, surface contact is buffered and the deformation of the female screw 35 is reduced. can do. In addition, the chamfer provided in the other outer peripheral part of the nut 21 is not an essential requirement in this invention, and this invention is applied even if it abbreviate | omits.

Next, a method of using the clamp fitting device 10 according to one embodiment of the present invention will be described. As shown in FIG. 1, the state in which the side surface of the pipe 14 is aligned with the recessed portion 15 of the fixed accommodation member 16, and the mounting in a state where the nut 21 is uncovered by covering the movable receiving member 18. The bolt 20 is rotated and attached to the U-shaped sheet portion 27. In this state, the nut 21 is fastened with a tool such as an impact wrench, a spanner, a monkey spanner, and the pipe is connected to the recess 28 of the movable accommodating member 18 and the recess 15 of the fixed accommodating member 16. (14) is sandwiched. In addition, the second clamp mechanism 12 is held between the pipes 14a in the same order.

Next, when the clamp fitting device 10 is removed from the pipe 14 (the same also applies to the pipe 14a), when the nut 21 is reversely rotated (rotated to the left) using an impact wrench, The screwing of the threaded part 32 and the female screw 35 is released, and the nut 21 retreats and moves to the position of the non-threaded part 33. Since the total length of the non-screw part 33 is longer than the female screw 35, the nut 21 will idle. Since the stopper 34 for preventing separation is formed at the end of the mounting bolt 20, the nut 21 does not fall off from the mounting bolt 20.

The above embodiment has been described in the case where the screw fastening mechanism according to the embodiment of the present invention is applied to the clamp fitting device 10 connecting the two pipes 14 and 14a, but one member (for example, Fittings, or special jigs, used for connecting ridges, grooves, round pipes, square pipes to other members (mounted steel, grooved steel, round pipes, square pipes, H-beams, I-beams) It is naturally possible to apply the screw fastening mechanism of this invention also to the fitting apparatus used when fixing to a member.

In addition, in the said Example, although this invention was demonstrated using the specific number, the numerical change and shape change in the range which does not change the summary of this invention are contained in the technical scope of this invention.

In addition to the annular material, the mounting portion provided at the base end of the mounting bolt includes a bolt head portion of the hexagon post, another nut screwed to the base portion side of the mounting screw, and a welding portion for fixing to the object.

1 is a side view of a clamp fitting device using a screw fastening mechanism according to one embodiment of the present invention.

2: (A) is a side view of the mounting bolt used for the said clamp fitting apparatus, (B) is a top view of the said mounting bolt.

3A and 3B are explanatory diagrams showing the manufacturing method of the mounting bolt.

4: (A) is a front view of the nut used for the said clamp fitting apparatus, (B) is a top view, (C) is an enlarged side cross-sectional view.

[Description of Symbols for Main Parts of Drawing]

10 Clamp Fitting Device 11 First Clamp Mechanism

12 Second clamp mechanism 13 Rivets

14, 14a pipe l5 recessed

16 fixed receiving member 17 pin

18 movable receiving member 19 pin

20 Mounting bolts 21 nuts

22 Main Panel 23 Side Panel

25 Main panel section 26 Connection section

27 seat 28 recess

30 pin receptacle 31 rod

32 Male thread 33 Non-threaded

34 Stopper to stop 35 Female thread

37 cutout 38 round hole

40 flange

Claims (5)

A screw fastening mechanism having a mounting bolt having a male screw portion and a nut screwed to the male screw portion, An anti-separation stopper for preventing detachment of the nut at an open end of the mounting bolt, and a diameter between the anti-separation stopper and the male screw portion, the diameter of which is equal to or less than the internal diameter of the female screw of the nut, and at least the screw length of the female screw. With a non-screw part having a, Screw fasteners. The method of claim 1, The separation preventing stopper is an annular portion having a diameter larger than the inner diameter of the female screw and smaller in diameter than the outer dimension of the nut. The method of claim 1, A screw fastening mechanism, wherein a mounting portion is formed at a proximal end of the mounting bolt, and the male screw portion is formed in front of the mounting portion. The method of claim 3, And the mounting portion is a pin accommodation portion integrally provided at a proximal end of the mounting bolt, wherein an axis of the pin accommodation portion and an axis of the mounting bolt are orthogonal to each other. In the temporary assembly fitting device for construction using the screw fastening mechanism according to claim 4, A fixed receiving member having a concave portion inwardly corresponding to the outer surface of the pipe to be mounted, a proximal end thereof rotatably connected to the proximal end of the fixed receiving member via a pin, and a nut receiving sheet formed at the distal end thereof, the outer surface of the pipe And a movable receiving member having a recess corresponding to the inner side thereof, The pin receiving portion of the mounting bolt is rotatably mounted to the distal end of the fixing receiving member through the pin, and the distal end of the mounting bolt is mounted to the nut receiving seat, and fixed by the nut screwed to the mounting bolt. Using a clamp mechanism for fastening the pipe clamped by the receiving member and the movable receiving member, Temporary assembly fittings for construction.

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