JPH0625696Y2 - nut - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a nut made of a metal plate that can be attached to and detached from a bolt with one touch.

[Conventional technology]

It is well known that a nut generally has an internal thread engraved on the entire inner peripheral surface of the screw hole.However, with this nut, when the nut is moved in the axial direction of the bolt, it must be screwed in and unscrewed one by one. Therefore, when a member is fastened to a long bolt such as a hanging bolt, there is a problem that the fastening work is inefficient.

Therefore, in Japanese Utility Model Laid-Open No. 61-175614 and Japanese Utility Model Laid-Open No. 62-128218, bolt insertion holes are formed in hexagonal nuts or ring-shaped nuts that extend obliquely across the screw holes. It has been proposed that the female screw is engaged with and disengaged from the thread of the bolt when the nut is tilted, so that the nut can be fitted on the bolt and slid to an arbitrary position.

[Problems to be solved by the device]

In this prior art, the nut can slide to the vicinity of the member while being fitted on the bolt, which has the advantage of improving the efficiency of the fastening work, but it requires a lot of labor to process the nut, resulting in a large manufacturing cost. There was a problem in that it increased.

In other words, the nut in this prior art is drilled from the direction orthogonal to the seat surface to form a pilot hole for the internal thread, and then the drill is drilled from a direction inclined with respect to the seat surface to form a sloped shape with the pilot hole. It is manufactured through a processing step in which a crossed bolt insertion hole is bored, a tap is passed through the pilot hole, and a female screw is engraved in a portion of the inner peripheral surface of the pilot hole that does not overlap with the bolt insertion hole. It will be.

However, in the case where the bolt insertion hole is crossed with the pilot hole in an inclined shape, the drill becomes a single-edged cutting state when drilling the bolt insertion hole, resulting in a significant decrease in processing speed and frequent drill breakage accidents. And likewise,
When engraving the female screw, the tap also becomes a single-edged cutting state, so the machining speed decreases and the accidental breakage of the tap occurs frequently.The decrease in the machining speed and the frequent occurrence of breakage accidents of the drill and the tap are caused. Then, the manufacturing cost increased significantly.

An object of the present invention is to make it possible to inexpensively manufacture a nut that can be attached to and detached from a bolt with one touch.

[Means for Solving the Problems]

In order to achieve this object, according to claim 1, a nut screwed with the bolt is formed in a rectangular tube body in which a metal plate is bent, and the bolt is provided in two side plates facing each other in the rectangular tube body. A bolt insertion hole that penetrates is formed in a long groove shape so that the bolt insertion hole in one of the side plates and the bolt insertion hole in the other side plate extend in opposite directions, and the inner peripheral edges of the both bolt insertion holes are formed. Among them, an engaging portion that is screwed over the screw thread of the bolt over approximately half the circumference is formed at a portion where the bolt overlaps each other when viewed in the axial direction.

Further, in the second aspect, the bolt insertion holes are formed so as to be cut open so as to open from the side end surfaces of the side plates.

[Function and effect of device]

According to the structure of claim 1, when the nuts are fitted to the bolts of the bolt insertion holes of the both side plates, the nuts are inclined so that the both side plates are inclined to a certain degree or more with respect to the axis of the bolt. The nut can slide to any position along the bolt axis without screwing into the threads,
If the postures of both side plates are changed so as to be substantially orthogonal to the axis of the bolt, the engaging portions of each side plate are screwed into the bolt threads so as to be sandwiched from both sides. With the above, the nut can be slid to the vicinity of the member and screwed in by a very small dimension, and even when the member is fastened to a long bolt, the fastening work can be performed quickly.

Since this nut is made of a metal plate and can be mass-produced at high speed by press working, the manufacturing cost can be markedly reduced as compared with the one manufactured by cutting like the above-mentioned prior art, and moreover, Since the nut is formed in a rectangular tube, there is almost no decrease in strength due to being made of a metal plate.

Therefore, according to the structure of claim 1, the nut which can be attached / detached to / from the bolt with one touch can be manufactured at an extremely low cost with almost no decrease in strength.
Since the nut is formed in a square tube shape, not only can it be tightened using an ordinary spanner wrench, but it can also be tightened by inserting a rod-shaped member such as a screwdriver into the hollow part and turning it, thus diversifying the tightening tools. It also has the effect of improving work efficiency.

Further, according to the structure of claim 2, the nut can be screwed into the thread of the bolt by changing the posture of the nut from a state in which the side plate is parallel to the axis of the bolt. Since it can be smoothly slid without causing a screw thread to be caught, in addition to the effect of claim 1, there is an effect that the nut can be attached and detached more easily.

〔Example〕

Next, referring to the drawings of the embodiments of the present invention (FIGS. 1 to 6), reference numeral 1 is a nut of the present invention formed by bending an elastic metal plate into a rectangular cylinder. In the two side plates 2 and 3 facing each other and extending in parallel with each other, long groove-shaped bolt insertion holes 5 and 6 in which the bolts 4 play through are formed, and the bolt insertion holes 5 and 6 extend in directions opposite to each other. When viewed from the axial direction of the bolt 4, the bolt insertion holes 5 and 6 are formed such that the base end portions of the bolt insertion holes 5 and 6 overlap each other. At the base end that overlaps when viewed from the direction, the thread 4 of the bolt 4
The engaging portions 7 and 8 having a wedge-shaped cross section and a radius of curvature of R which are adapted to be screwed over approximately a half of a are formed.

In this case, the tips of the bolt insertion holes 5 and 6 are formed so as to open from the end faces of the side plates 2 and 3, respectively, and the engaging portions 7 and 8 are formed on the side plates 2 and 3 respectively. Lead angle θ of thread 4a of bolt 4 with respect to the plane
And the engaging portions 7 and 8 are slightly inclined with respect to the center O1 and O2 of the radius of curvature so that the engaging portions 7 and 8 are close to each other when viewed from the axial direction of the bolt 4. It is eccentric.

Also. There is a slight dimension (e) between the end faces of the side plates 2 and 3.
Although the gap 9 is formed, it may be adhered without forming the gap 9. Since the engaging portions 7 and 8 are screwed from the opposite sides of the bolt 4 with respect to the axis, the side plates 2 and 3 are
The interval () between them is a dimension obtained by adding a 1/2 pitch to a dimension that is an integral multiple of the pitch of the thread 4a of the bolt 4. In this case, the space between the side plates 2, 3
The nut 1 is loosely fitted to the bolt 4 by making the nut 1 larger than the outer diameter dimension thereof.

According to this structure, the nut 1 rotates as shown by the arrow A direction in FIG. 1 so that the side plates 2 and 3 can be fitted and slid on the bolt 4 in a posture in which the side plates 2 and 3 are parallel to the axis of the bolt 4. When the postures of the side plates 2 and 3 are changed so as to be substantially orthogonal to the axis of the bolt 4, the engaging portions 7 and 8 are screwed into the screw threads 4a of the bolt 4 from the opposite directions, and are screwed together. When the member 10 is fastened to the bolt 4, the nut 1 may be slid to the vicinity of the member 10, the posture may be changed and screwed in. Even if the bolt 4 is long, the fastening work can be performed quickly. is there.

In this case, if the bolt insertion holes 7 and 8 are cut open as in the embodiment, as described above, the side plates 2 and 3 can be fitted into the bolt 4 in a state in which the side plates 2 and 3 thereof are parallel to the axis of the bolt 4 and the thread 4a. Since it can be smoothly slid without catching on the member 10, the work for fastening the member 10 can be performed more quickly.

Further, as described above, when both engaging portions 7 and 8 are eccentric,
As shown in FIG. 6, the side plates 2 and 3 are screwed into the bolt 4 in a state in which they are slightly inclined with respect to the plane orthogonal to the axis of the bolt 4, and the side plates 2 and 3 are elastically deformed as they are screwed into contact with the member 10. This means that the nut 1 is pressed against the member 10 by its own elastic force when the member 10 is fastened, so that the nut 1 is in the same state as when the spring washer is interposed between the nut 1 and the member 10. Therefore, there is an advantage that loosening can be prevented.

In the above embodiment, the other end of the bolt insertion holes 5 and 6 was cut open toward the end faces of the side plates 2 and 3, but the bolt insertion hole in the nut of the present invention is as shown in FIG. The bolt insertion holes 5a and 6a may be formed in a long hole shape or a dull hole shape, and in this case, as shown in FIG. 8, the nut 4 is tilted and the bolt insertion holes 5a and 6a are formed. By being fitted on the bolt 4, it becomes slidable with respect to the bolt 4. Further, in the case where the bolt insertion holes 5a and 6a having the long hole shape or the daruma hole shape are formed as described above,
As shown in FIGS. 10 to 10, these bolt insertion holes 5a, 6
a may be formed so as to extend along the bending direction of the side plates 2 and 3, and in this case as well, both engaging portions 7 and 8 are slightly eccentric by a dimension (s) as in the above embodiment. You may let me.

Further, in any of the above cases, as shown in FIG. 11, the periphery of the engaging portions 7 and 8 may be deformed so as to be concave inward.
Since 3 is pushed out, the nut 1 itself can retain the loosening preventing function without eccentricizing the engaging portions 7 and 8.

[Brief description of drawings]

1 to 6 show an embodiment in which a bolt insertion hole is cut open to form, FIG. 1 is a perspective view showing a mounting state, FIG. 2 is a perspective view of a nut, FIG. 3 is a plan view of the nut, 4 is a sectional view taken along line IV-IV of FIG. 3, FIG. 5 is a sectional view taken along line VV of FIG. 3, FIG. 6 is a sectional view showing a tightened state of the member, and FIG. 7 shows a bolt insertion hole. FIG. 8 is a perspective view of an embodiment formed in the shape of an elongated hole, FIG. 8 is a view showing its mounted state, FIG. 9 is another example of a case where the bolt insertion hole is formed in the shape of an elongated hole, and FIG. 10 is its mounted state. And FIG. 11 are views showing still another embodiment. 1 ... Nut, 2, 3 ... Side plate, 4 ... Bolt, 5,
6, 5a, 6a ... Bolt insertion hole, 7, 8 ... Engaging portion,
10 ... Material.

Claims (2)

[Scope of utility model registration request] 1. A nut to be screwed into a bolt is formed in a rectangular tubular body formed by bending a metal plate, and two side plates facing each other in the rectangular tubular body are provided with bolt insertion holes through which the bolt plays through. ,
The bolt insertion hole in one side plate of the both side plates and the bolt insertion hole in the other side plate are formed in a long groove shape so as to extend in mutually opposite directions, and from the axial direction of the bolt in the inner peripheral edge of the both bolt insertion holes. A nut characterized in that an engaging portion that is screwed with a thread of the bolt over approximately half a circumference is formed at a portion where they overlap each other when viewed. 2. The nut according to claim 1, wherein each of the bolt insertion holes is formed so as to be opened so as to open from a side end surface of each of the side plates.