JP3834442B2 - Fastener - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is fastened in a state where the siding plates constituting the outer wall of the building are overlapped with each other, or in a state where the ends of the corrugated folded plates constituting the roof are overlapped with each other. The present invention relates to a fastener used for the purpose.
[0002]
[Prior art]
In order to fasten the ends of a pair of corrugated plates constituting the roof in a state where they are overlapped with each other, for example, they are fitted to a blind bolt, a fastening nut, and a shaft portion of the blind bolt. Fasteners with open leg collars and resin inserts are used. In such a fastener, the open leg collar and the resin insert are sequentially fitted to the shaft portion close to the head of the blind bolt. The open leg collar is provided with a plurality of slits opened on the distal end side in a state along the axial direction at the distal end portion located on the far side of the head.
[0003]
In such a fastener, the blind bolt is passed through the end portions of a pair of folded plates that are overlapped with each other in a state where the open leg collar and the resin insert are sequentially fitted to the blind bolt. A tightening nut is screwed to the bolt. Then, by rotating the blind bolt while tightening the tightening nut and tightening the tightening nut, the tightening nut is pressed against the surface of one of the folded plates. When the blind bolt is further rotated in such a state, the blind bolt head is slid so as to approach the folded plate. As a result, the open leg collar and the resin insert are compressed between the head of the blind bolt and the surface of the folded plate, and the open leg collar is in pressure contact with the resin insert. From the side, it is expanded sequentially and pressed against the surface of the folded plate with the insert inserted inside. In this state, when the blind bolt is further rotated, the resin insert is pressed into the surface of the folded plate in a state of being inserted into the open leg collar and is crushed. Thereby, the edge parts of a pair of folded plates piled up mutually are fastened strongly.
[0004]
[Problems to be solved by the invention]
In the fastener having such a configuration, the resin insert is strongly pressed against the surface of the folded plate by tightening the tightening nut. When the tightening nut is further tightened, the resin insert is further strongly pressed against the surface of the folded plate. In this way, the tightening nut can be further tightened if the torque required for tightening is increased, and thus there is a problem that it cannot be stably fixed in a state where it has been prevented from loosening, and loosens and falls off due to vibration or the like. There is a risk.
[0005]
Further, by rotating the blind bolt with respect to the tightening nut, the amount of protrusion from the tightening nut at the shaft portion of the blind bolt increases. In this way, when the shaft part of the blind bolt protrudes greatly from the tightening nut, the appearance is poor, and if it is used in a place where people pass, the person at the tip of the protruding blind bolt shaft part May be damaged.
[0006]
The present invention solves such a problem, and its purpose is to firmly fasten at least a pair of fastened members securely in a state where they are securely loosened, and has excellent appearance. An object of the present invention is to provide a fastener that can be used safely even in places where people pass.
[0007]
[Means for Solving the Problems]
The fastener of the present invention is provided with a head at one end of a shaft portion penetrating at least a pair of fastened members stacked on each other, and having a polygonal cross section at the other end of the shaft portion. A chucking portion is provided, and the shaft portion is provided with a pair of screw groove portions along the same direction through the cutting groove portion continuously from the chucking portion, and a pair of screw groove portions. in succession, and Rubo belt opposite screw grooves provided along the direction opposite to the pair of screw grooves, is screw-coupled to a pair of screw grooves in the bolt of this, on one of the workpieces a nut tightening to be pressed, are fitted on the shaft portion adjacent to the head before Kibo belt, as may be sequentially expanded from the end portion of the chucking portion, a plurality of slits along the axial direction Open leg collars, The shaft portion of the Kibo belt, are fitted in succession in the open leg color, while being inserted into expanded been open leg in color, is crushed by being pressed against the surface of the workpieces A resin insert, and the bolt is rotated in a state where the tightening nut is prevented from rotating so that the tightening nut is pressed against the fastened member, and the leg collar and the insert are pressed against the fastened member. While crushing the insert, the tip of the leg collar is expanded and pressed against the member to be fastened, while the bolt is still rotated when the tightening nut reaches the reverse screw groove of the bolt and is locked. It cut | disconnects in the groove part for a cutting | disconnection located above a clamping nut, It is characterized by the above-mentioned.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view showing an example of an embodiment of a fastener of the present invention, and FIG. 2 is a front view of the assembled state of the fastener.
[0009]
The fastener 10 is used as a pair of members to be fastened, for example, to fasten the ends of a pair of folded plates 20 configured in a corrugated shape, and a head 11b is provided at one end of the shaft portion 11a. a bolt 11 which is, and a nut 12 tightening is screwed into bolt 11.
[0010]
The pair of folded plates 20 confronted with each other by the fastener 10 of the present invention are provided with continuous wave portions having a trapezoidal cross section, and the respective end portions overlap each other in a fitted state. It has been. And the through-hole 21 is each provided in the edge part of the folded plate 20 piled up mutually, and when each edge part of the folded plate 20 is piled up mutually, each through-hole 21 is alignment state It comes to oppose at . Bolts 11, so that the ends of the folding plates 20 of a pair are inserted into the respective through-holes 21 became alignment are superimposed.
[0011]
Figure 3 is a front view of the bolt 11. Bolts 11 This includes a shaft portion 11a which is linearly and head 11b of truncated cone shape provided at one end of the shaft portion 11a, provided on the other end of the shaft portion 11a And a square columnar chucking portion 11c. The head 11b has a constant outer diameter at the end close to the shaft 11a, and the outer diameter gradually decreases as the head 11b moves away from the shaft 11a except for the end.
[0012]
In the chucking portion 11c having a square cross section provided at the tip of the shaft portion 11a, each diagonal line in the cross section is along the diameter of the shaft portion 11a, and the length of each diagonal line is equal to the diameter of the shaft portion 11a. Are equal. Thread groove portion 11d of the chucking unit 11 in each corner of the c fastening nut 12 is screwed, are formed respectively.
[0013]
The end proximate the chucking portion 11c of the shaft portion 11a is screw groove portion 11e of the clamping nut 12 is screwed is provided for a suitable length, also in the screw groove section 11e, cut through the use groove 11f, thread groove portions 11g of the nut 12 along the same direction as screwed fastening is provided continuously. Then, in succession to the thread groove portion 11g provided in the center portion of the shaft portion 11a, opposite the threaded groove portion 11h along the opposite direction it is provided with the screw groove portion 11g. A thread groove is not provided over an appropriate length on the outer peripheral surface of the end portion of the shaft portion 11a adjacent to the head portion 11b.
[0014]
As shown in FIGS. 1 and 2, the shaft portion 11a of bolt 11, the end proximate to the head 11b, the open leg collar 13 made of a metal such as stainless steel is fitted. The open leg collar 13 is made of a metal such as stainless steel in a cylindrical shape, and four slits 13a opened at one end edge are formed on the circumferential surface at equal intervals in the circumferential direction. Yes. The space | interval in the inner back part of each slit 13a is the state which each expanded. Open leg collar 13 has an end portion opening of each slit 13a is located, so as to be positioned distally of the head 11b of the bolt 11 is fitted on the shaft portion 11a of bolt 11.
[0015]
The shaft portion 11a of bolt 11 is continuously in the open leg collar 13, made of a synthetic resin insert 14 is fitted. The insert 14 has a cylindrical shape, and a flange portion 14a is formed at one end thereof. Then, in a state of being positioned on the far side of the head 11b of the flange portion 14a Gabo belt 11 is fitted on the shaft portion 11a of the insert 14 Gabo belt 11.
[0016]
Bolts 11, the open leg collar 13 and the insert 14, in a state where the fitting continuously to the shaft portion 11a, is inserted into the through hole 21 provided to the respective folded plate 20.
[0017]
The shaft portion 11a of bolt 11 is waterproof packing 15 is fitted. Waterproof packing 15 is configured in a disc shape by an elastic body such as rubber, its central portion the shaft portion 11a of bolt 11 is inserted through.
[0018]
Further, the shaft portion 11a of bolt 11 which protrudes from the waterproof packing 15 is squeezed washer 16 is fitted, which is constituted by a metal plate of stainless steel or the like. The aperture washer 16 has a disk shape larger in diameter than the waterproof packing 15, and is configured in a truncated cone shape so as to gradually protrude away from the waterproof packing 15 toward the center so as to cover the waterproof packing 15. Yes.
[0019]
The shaft portion 11a of bolt 11 which protrudes from the washer 16 stop, the clamping nut 12 is screwed. As the tightening nut 12, a normal hexagon nut is used.
[0020]
The fastener 10 having such a configuration is used as follows. First , the ends of the pair of folded plates 20 are overlapped with each other, and the through holes 21 provided at the ends of the folded plates 20 are brought into alignment. Then, the shaft portion 11a of bolt 11, Ru fitted to the open leg collar 13 and the insert 14 in order.
[0021]
Further, the shaft portion 11a of bolt 11, the waterproof packing 15 and the diaphragm washer 16 are fitted in sequence. Then, the clamping nut 12 is screwed to the threaded groove portion 11d provided in the chucking section 11c of the bolt 11.
[0022]
In such a state, the detent by a pair of chucking portion 11c of the bolt 11 provided at an end portion inserted into the through hole 21 of the alignment of the folding plate 20, the tightening tool such as a nut 12 spanner in state, it is rotated by being clamped by the proper person of special tools. Thus, the tightening nut 12, the screw groove 11e of the bolts 11, sequentially, is screw feeding, in contact with the stop washer 16, through the aperture washer 16 and the waterproof packing 15, one of the folded plate 20 Press-contacted to the surface.
[0023]
Then, further, by rotating the state depot belt 11 that stops rotation of the nut 12 tightened, the screwed fastening nut 12, as the head 11b of the bolt 11 approaches the tightening nut 12, the entire bolt 11 There is slid, flange portion 14a of the insert 14 becomes strongly pressed state on the surface of the folding plate 20. In this state, further tightening prevented from rotating the nut 12, when tightened nuts 12 tightened by rotating the bolt 11, fitted on the shaft portion 11a of bolt 11 engaged the open leg collar 13 and the insert 14 is pressed against the folded plate 2 0, the tip of the open leg collar 13 is widened insert 14 is fitted into the open leg collar 13.
[0024]
In this state, the rotation of the bolt 11, further tightening of the clamping nut 12, the proximal end of the open leg collar 13, flange portion 14a of the resin of the insert 14 is pressed against the surface of the folded plate 20 As shown in FIG. 4, the resin insert 14 is compressed by the inner peripheral surface of the open leg collar 13 and the folded plate 20, and is crushed into a state of bulging outward. After that, when the tightening of the tightening nut 12 is continued, the tip end portion of the open leg collar 13 is in pressure contact with the folded plate 20.
[0025]
In this state, the clamping nut 12 is passed through the screw groove portion 11e moiety and cutting groove 11f of the bolt 11, in a state of being screwed into the screw groove portion 11g of the central portion of the shaft portion 11a. Then, in this state, further, by the rotation of the bolt 11, when tightened clamping nut 12, the clamping nut 12 rides over the cutting groove 11f provided on the shaft portion 11a of bolt 11, a thread groove parts 11g to be screwed further, reaching hand thread groove portion 11h. Thus, the tightening nut 12 is ready to engaged with the reverse screw groove 11h, it is locked so as not to be rotated relative to the bolt 11 is integrated with the bolt 11.
[0026]
Thus, tightening the nut 12 while being integrated with the Gabo belt 11, by the rotation of the bolt 11 to the further clamping the addition of rotational force to the nut 12, bolt 11, which is detent by a special tool large shearing force between the distal portion from the cutting groove 11f, the clamping nut 12 is threadedly coupled portion in the axial portion 11a close to the head 11b from the cutting groove 11f is added in, bolt 11 As shown in FIG. 5, it is cut at the cutting groove 11f.
[0027]
Tip of the shaft portion 11a of bolt 11 is disconnected fastener 10 includes an insert 14 that is strongly pressed against the folding plate 20 by the open leg collar 13, strongly folded plate 2 0 by tightening the nut 12 The folded plates 20 that are stacked on each other are firmly pressed against each other by the waterproof packing 15 that is pressed. Moreover, the clamping nut 12, because it is locked by the inverse screw groove portion 11 h of the shaft portion 11a of bolt 11, there is no possibility that loose due to vibration or the like, over a long period, stable respective folding plates 20 to each other Can be concluded.
[0028]
Moreover, the shaft portion 11a of bolt 11, in the tip end portion has been removed, is shorter projecting length of the shaft portion 11a of bolt 11 from the clamping nut 12, therefore, they are fastened to each other appearance of folding plate 20 is remarkably improved. Also, in this way, for fastening protruding length from the nut 12 of the bolt 11 is shortened, in places such as passing a person, superposed siding plates that constitute the outer wall of a building from each other be used for fastening in a state, the shaft portion 11a distal end of the bolt 11, there is no possibility that passers scratched, can be used safely.
[0029]
【The invention's effect】
Thus, the fastener of the present invention can be firmly fastened in a state in which the members to be fastened are securely loosened. Moreover, in a state in which entered into workpieces, clamping projection amount of the shaft portion of the bolt from the nut is reduced, the appearance and safety is remarkably improved.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing an example of an embodiment of a fastener of the present invention.
FIG. 2 is a front view of a state in which the fastener is assembled.
3 is a front view of the used Rubo belt to the fastener.
FIG. 4 is a front view showing one process when the folded plates are fastened with the fasteners.
FIG. 5 is a front view showing a state in which folded plates are fastened by the fasteners.
[Explanation of symbols]
10 fastener 11 volts <br/> 11a shaft portion 11b head 11c chucking portion 11d screw groove 11e thread groove 11f cutting groove 11g thread groove 11h opposite thread groove 12 clamping nut 13 open leg collar 14 the insert 15 waterproof packing 16 Diaphragm washer 20 Folded plate 21 Through hole

Claims (1)

A head portion is provided at one end portion of the shaft portion that penetrates at least a pair of fastened members that are overlapped with each other, and a chucking portion having a polygonal columnar cross section is provided at the other end portion of the shaft portion. Further, the shaft portion is provided with a pair of screw groove portions along the same direction through the chucking portion through the cutting groove portion, and the pair of screw groove portions is continuous with the pair of screw groove portions. and Rubo belt opposite screw grooves provided along the opposite direction to the thread groove of the clamping nut is screwed to a pair of screw grooves in the bolt of this, it is pressed against the one of the workpieces, are fitted on the shaft portion adjacent to the head before Kibo belt, as may be sequentially expanded from the end portion of the chucking portion side, the open leg of the plurality of slits are provided respectively along the axial direction color and, to the shaft portion of the front Kibo belt A resin insert that is continuously fitted to the open leg collar and is crushed by being pressed into the surface of the fastening member while being inserted into the wide open leg collar. The bolt is rotated with the tightening nut being prevented from rotating, the tightening nut is pressed against the member to be fastened, the open leg collar and the insert are pressed against the member to be fastened, and the insert is crushed and opened. While the tip of the leg collar is expanded and brought into pressure contact with the member to be fastened, when the tightening nut reaches the reverse screw groove of the bolt and is locked, the bolt is still rotated and positioned above the tightening nut. The fastener cut | disconnected in the groove part for cutting to perform.

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