JPH0791426A - Nut - Google Patents

Abstract

PURPOSE:To provide a nut which can be fit to a bolt without screwing and can fix positively even when the thread diameter of the bolt changes or when there is flaw on the bolt surface. CONSTITUTION:A pair of slide plates 3,4 getting mutually close or away and el.astic members 5,6 for moving the slide plates 3,4 in the getting closer direction are disposed within a base plate 2 having a bolt penetration hole 10 in the middl' Self-locking edges 11,12 fitting to bolt threads are provided on mutually opposed sides of the slide plates 3,4. Faces in single direction of the self-locking edges are taper faces for pushing opening the slide plates 3,4 in contact with the threads. And faces in the other direction are fitting faces for preventing pulling-off of the nut by getting on the threads.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nut for fixing a lighting fixture or the like in combination with a bolt.

[0002]

2. Description of the Related Art As a mounting bracket for mounting a lighting fixture on a ceiling in a room, a bolt 22 is mounted on a fixing bracket 21 fixed to the ceiling as shown in FIG. Clamping metal fittings 23
Is fixed by tightening a nut 24 screwed into the bolt 22.

By the way, in the above-mentioned mounting fitting, the length of the bolt 22 is formed with a margin larger than a required dimension so that several kinds of instruments and the like can be fixed.
If the mounting dimension of the instrument or the like is short and the bolt length remains large, it takes a long time to screw the nut 24 into the bolt 22 and there is a problem that the work efficiency is poor.

Further, if the screw diameters of the nut 24 and the bolt 22 are slightly different from each other, the screwing cannot be carried out. Therefore, it is necessary for the operator to select the nut each time according to the screw diameter of the bolt 22, which is troublesome. There's a problem.

Further, if the screw accuracy of the nut 24 is poor, the tightening failure or the damage of the bolt 22 is likely to occur, and conversely, if the screw thread of the bolt 22 is slightly deformed or damaged, the nut 24 should be mounted. There is a problem that it becomes impossible to use the mounting bracket.

The present invention has been made in order to solve the above problems, and can be easily installed without screwing the bolt, and the screw thread of the bolt can be changed, and the surface of the bolt can be slightly damaged. It is an object of the present invention to provide a nut that can be securely fixed even if there is.

[0007]

In order to solve the above-mentioned problems, a nut of the present invention comprises a base plate having a bolt insertion hole, a pair of slide plates approaching and separating from the bolt insertion hole, and both slides thereof. Incorporating an elastic member that urges the plates toward each other, on the opposite sides of each slide plate,
A non-return blade that enters the inside of the bolt insertion hole when each slide plate approaches is provided, and the surface of one side of each non-return blade facing the bolt insertion hole abuts the thread of the bolt and pushes each slide plate. The taper surface that opens is used, and the surface on the other direction side is the locking surface that bites into the thread of the bolt to prevent the nut from coming off.

[0008]

In the nut having the above structure, when the taper surface of the check blade is directed to the bolt side, the bolt is fitted into the bolt insertion hole of the board and the board is pushed in the axial direction of the bolt.
The slide plate is pushed open by the contact between the tapered surface of the check blade and the screw thread of the bolt, and the nut enters the bolt.

When the pushing of the nut onto the bolt is stopped, the engaging surface of the check blade bites into the thread of the bolt due to the urging of the elastic member to prevent the nut from coming off.

In the above nut, since the slide plate moves toward and away from each other according to the diameter of the bolt, even if the thread of the bolt is changed or the surface of the bolt is damaged, there is a thread that the check blade bites. If so, the nut can be securely fixed.

[0011]

1 to 5 show a nut according to an embodiment. The nut 1 is composed of a substrate 2, a pair of slide plates 3 and 4 incorporated in the substrate 2, and a pair of elastic members 5 and 6.

The substrate 2 is a front plate 7 connected by screws 9.
And a back plate 8, and a circular bolt insertion hole 10 penetrating the front plate 7 and the back plate 8 is provided in the center thereof.

The pair of slide plates 3 and 4 are provided so as to approach and separate toward the bolt insertion hole 10, and V-shaped non-return blades 1 are provided on the opposite side edges 3a and 4a, respectively.
1 and 12 are formed. These check blades 11 and 12 are
When the slide plates 3 and 4 approach each other, they are provided so as to enter inside the bolt insertion hole 10.
The surface on one side facing 0 is a tapered surface 13 whose plate thickness gradually decreases toward the end. This tapered surface 13
When contacting the thread 25 of the bolt 22 as shown in FIG. 4, the slide plates 3, 4 follow the inclination of the thread 25.
It works by pushing outwards.

Further, the taper surface 13 of each of the check blades 11 and 12
The surface on the side opposite to is a flat locking surface 14 that intersects the tapered surface 13 at an acute angle.
It acts to stop the movement of the nut 1 that tries to get out of the bolt 22 by biting into the thread 25 of the second screw 25.

The pair of elastic members 5 and 6 are formed by bending a metal wire such as spring steel, and have leg portions 15 and 16 at both ends for holding the slide plates 3 and 4, respectively. The elastic members 5 and 6 are provided on the tapered surfaces 13 of the check blades 11 and 12.
And the screw thread 25 of the bolt 22 come into contact with each other so that each slide plate 3,
4 is pushed open, the legs 15 and 16 are slid onto the slide plate 3,
4 is brought into contact with the outer surface of the slide plate 4, and the elasticity of each slide plate 3,
Energize 4 in the direction of approaching.

Further, the front plate 7 of the substrate 2 is provided with an operation window 17 for exposing a part of the opposite sides 3a, 4a of the slide plates 3, 4, and each slide facing the operation window 17 is exposed. A gap 18 for inserting the tip of a driver is formed on the opposite sides of the plates 3 and 4.

Further, elastic cushion materials 19 such as sponges and rubber plates are attached to both sides of the back plate 8 of the substrate 2.

The nut 1 of this embodiment has the structure as described above, and the taper surface 13 of the check blades 11 and 12 is attached to the bolt 22.
When the bolt 22 is fitted into the bolt insertion hole 10 of the substrate 2 toward the side and the nut 1 is pressed in the axial direction of the bolt 22,
As shown in FIG. 5, the tapered surfaces 13 of the check blades 11 and 12 and the threads 25 of the bolt 22 come into contact with each other, and the slide plates 3 and 4
Is pushed open and the nut 1 is pushed into the inner side of the bolt 22.

As shown in FIG. 6, the nut 1 has a clamp metal fitting 2
When the slide plates 3 and 4 approach each other due to the urging force of the elastic members 5 and 6, the check blades 11 and 12 enter between the threads 25 of the bolt 22, The locking surface 14 stops the movement of the nut 1 in the slip-out direction.

In this case, the cushion material 19 of the nut 1 is crimped to the sandwiched metal fitting 23, and the elastic repulsive force of the cushion material 19 causes the nut 1 to move.
By pushing back, the play between the locking surfaces 14 of the check blades 11 and 12 and the thread 25 of the bolt 22 is eliminated, and the nut 1 is securely fixed to the bolt 22 without rattling.

To remove the fixed nut 1, use the nut 1
Insert the tip of a screwdriver from the operation window 17 into the gap 18 between the slide plates 3 and 4 and rotate the screwdriver to push open the slide plates 3 and 4 and check threads of the check blades 11 and 12 and the bolt 22. Since the engagement with 25 is released, the nut 1 can be easily pulled out from the bolt 22.

In the above embodiment, the slide plate 3,
The elastic members 5 and 6 for urging 4 are formed by bending a metal wire, but other elastic materials such as rubber and coil springs may be used.

[0023]

[Effect] As described above, the nut of the present invention can be mounted simply by pushing it in the axial direction of the bolt without screwing it in. Therefore, the mounting work can be performed in a very short time, and the operation failure such as the tightening failure can be prevented. It can be lost.

Further, since the slide plate that bites into the screw thread of the bolt approaches and separates from each other, even if the screw diameter of the bolt changes,
One nut can be used, and there is an advantage that the number of types of nuts prepared for multiple bolts can be greatly reduced.

Furthermore, since the nut can be fixed if the bolt has a screw thread enough for the check blade of the slide plate to bite,
Even if the surface of the bolt is damaged, the nut can be installed, and the problem of accuracy error of the nut is eliminated.

[Brief description of drawings]

FIG. 1 is a front view showing a surface of a nut according to an embodiment.

FIG. 2 is a rear view showing the back surface of the above nut.

FIG. 3 is a front view showing the inside of the nut.

FIG. 4 is an exploded perspective view of the above nut.

FIG. 5 is a partially enlarged sectional view showing a usage state of the above nut.

FIG. 6 is a side view showing a fixed state of the above nut.

FIG. 7 is a perspective view showing a conventional example.

[Explanation of symbols]

 1 Nut 2 Board 3, 4 Slide Plate 5, 6 Elastic Member 10 Bolt Insertion Hole 11, 12 Check Blade 13 Tapered Surface 14 Locking Surface 17 Operation Window 19 Cushion Material 22 Bolt 25 Thread

Claims (1)

[Claims] 1. A substrate having a bolt insertion hole, and a pair of slide plates that move toward and away from the bolt insertion hole,
An elastic member that urges the two slide plates toward each other is incorporated, and check blades that enter the inside of the bolt insertion hole when the slide plates approach each other are provided on opposite sides of the slide plates. The surface of the one side facing the bolt insertion hole of the stop blade is a taper surface that abuts the thread of the bolt and pushes out each slide plate, and the surface of the other direction bites into the thread of the bolt and A nut that serves as a locking surface to prevent slipping out.