JP3039081U - Joint nut - Google Patents

Abstract

(57) [Abstract] PROBLEM TO BE SOLVED: To provide a joint nut having a simple structure capable of visually confirming a screwed state of an anchor bolt, a suspension bolt, or the like. A frame in which an elongated metal plate is bent into a frame shape, and both ends of the metal plate are overlapped to form a superposed portion 5 and openings 9 are provided on both sides in the width direction of the frame shape. Body part 2,
Projecting portions 10 and 14 that project toward the overlapping portion 5 and the frame surface 6 that faces the overlapping portion 5 and face each other, and the protruding portions 10 and 14 respectively.
Female screw holes 11 and 15 respectively provided on the outer peripheral surface 4 of the overlapping portion 5 and a guide hole 12 having a diameter larger than that of the female screw hole 11. Then, when the screw shaft and the joint nut 1 are screwed together, the screwed state of the female screw holes 11 and 15 and the screw shaft is visually confirmed through the opening 9.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a joint nut for connecting screw shafts such as anchor bolts and suspension bolts to each other.

[0002]

[Prior art]

 With this type of joint nut, for example, when hanging a cable rack, steel pipe, etc. from the ceiling, if the suspension bolt is not screwed into the joint nut sufficiently, the joint nut may loosen due to vibration and the suspension bolt may come off. Accidents occur.

Therefore, in order to prevent the occurrence of such an accident, conventionally, among the joint nuts, there has been one in which it is possible to easily visually confirm that the bolt is screwed to a predetermined length (Actual Fairness 4). No. 24171).

[0004]

[Problems to be solved by the device]

 However, in such a conventional joint nut, a soft stopper, which is pressed between a pair of bolts screwed in from both sides of the nut body and partly protrudes from the hole, is provided inside the nut body, resulting in a complicated structure and cost reduction. There is a problem of being up.

Therefore, an object of the present invention is to provide a continuous nut having a simple structure in which it is possible to visually confirm that the screw shaft has been screwed in to a predetermined length without increasing the cost due to the complicated structure. is there.

[0006]

[Means for Solving the Problems]

 Therefore, in order to achieve the above object, the invention described in claim 1 is a joint nut 1 for connecting screw shafts such as anchor bolts and suspension bolts to each other as shown in the following embodiments. A frame body in which an elongated metal plate is bent into a rectangular frame shape, and both ends of the metal plate are overlapped to form an overlapping portion 5 and openings 9 are provided on both sides in the width direction of the rectangular frame shape. A part 2, projecting parts 10 and 14 projecting from the overlapping part 5 and the frame surface 6 facing the overlapping part 5, upper and lower female screw holes 11 and 15 respectively provided in the projecting parts 10 and 14, and A guide hole 12 formed in the outer frame surface 4 of the overlapping portion 5 and having a diameter larger than that of the female screw hole 11;

According to a second aspect of the present invention, for example, as shown in the illustrated embodiment, in a joint nut 1 for interconnecting screw shafts such as anchor bolts and suspension bolts, an elongated metal plate is folded into a frame shape. A frame body 2 which is bent and has overlapping portions 5 formed by overlapping both ends of the metal plate and openings 9 provided on both sides in the width direction of the frame; To the frame surface 6 to be protruded from each other by burring, upper and lower female screw holes 11 and 15 provided in each of the protrusions 10 and 14, and the outer frame surface 4 of the overlapping portion 5. And a guide hole 12 having a larger diameter than the female screw hole 11 is provided.

In the joint nut 1 according to claims 1 and 2, for example, when the anchor bolt 19 and the suspension bolt 24 are connected to each other, the lower end of the anchor bolt 19 is inserted into the guide hole 12 and the upper female screw is inserted. The anchor bolt 19 is guided into the hole 11 and the joint nut 1 is rotated to directly check the screwing state, and the anchor bolt 19 is screwed into the female screw hole 11 by a predetermined length. While directly visually observing, the upper end of the hanging bolt 24 is screwed into the lower female screw hole 15 by a predetermined length.

According to a third aspect of the present invention, for example, as shown in the illustrated embodiment, in a joint nut 1 for interconnecting screw shafts such as anchor bolts and suspension bolts, an elongated metal plate is folded into a frame shape. A frame body 2 which is bent and has overlapping portions 5 formed by overlapping both ends of the metal plate and openings 9 provided on both sides in the width direction of the frame; To the outer frame surface 4 of the overlapping portion 5, the projecting portions 10 and 14 projecting from each other on the frame surface 6 to be formed, the upper and lower female screw holes 11 and 15 provided in the respective projecting portions 10 and 14, respectively. A guide hole 12 having a larger diameter than the female screw hole 11 is provided, and the anchor 17 is guided by the guide hole 12 and the anchor 17 is screwed into the upper female screw hole 11.

[0010]

[Embodiment of the invention]

 Hereinafter, an embodiment of a joint nut according to the present invention will be described in detail with reference to the drawings.

1 to 4 show an embodiment of a joint nut according to the present invention. The joint nut indicated by reference numeral 1 in the drawing includes a frame body portion 2.

The frame body 2 uses an elongated metal plate, and the length direction of the metal plate is sequentially bent at right angles in the same direction at predetermined intervals to form a rectangular frame shape, and inner frames at both ends are formed. The overlapping portion 5 in which the surface 3 and the outer frame surface 4 are overlapped and spot-welded, the frame surface 6 facing the overlapping portion 5, and both side frame surfaces 7.8 between the overlapping portion 5 and the frame surface 6. And has a shape having openings 9 on both sides in the width direction of the frame.

In the overlapping portion 5 of the frame body portion 2, a protruding portion 10 is provided inwardly at approximately the center of the inner frame surface 3 by, for example, burring, and a female screw hole 11 is formed inside the protruding portion 10. It will be provided. Then, as shown in FIG. 4, the length L of the protrusion 10 is set to be several times the plate thickness a of the metal plate to increase the pitch number of the female screw holes 11.

Further, as shown in FIG. 4, the overlapping portion 5 of the frame portion 2 is formed with a guide hole 12 at substantially the center of the outer frame surface 4. The guide hole 12 has a diameter B slightly larger than the diameter b of the female screw hole 11.

On the other hand, as shown in FIGS. 1 and 3, the frame surface 6 facing the overlapping portion 5 is provided with a protruding portion 14 at approximately the center by, for example, burring. The protruding portion 14 is provided so as to face the protruding portion 10 and has a female screw hole 15 provided therein. Then, the number of pitches of the female screw holes 15 is increased by making the length of the protrusions 14 several times the plate thickness of the metal plate.

However, when connecting the anchor bolt and the suspension bolt using the joint nut 1 configured as described above, the state shown in FIGS. 1 and 2 is obtained.

An anchor indicated by reference numeral 17 in the drawing is screwed to an anchor body 18 having a notch 18 a by cutting in from one end, an anchor bolt 19 inserted into the anchor body 18, and an anchor bolt 19. It comprises a nut 20. Then, as shown in the drawing, for example, the notch portion 18a is opened by inserting it into the anchor hole 22 provided in the concrete structure portion 21 and rotating the nut 20 to move the anchor body 18 in the axial direction of the anchor bolt 19. The opening is fixed by pressing contact with the side surface of the hole or in a locked state, and the screw portion 19a of the anchor bolt 19 projects from the wall surface by a predetermined length.

When attaching the joint nut 1 to such an anchor bolt 19, the joint nut 1 is held so that the overlapping portion 5 faces upward, and the screw portion 19 a of the anchor bolt 19 is inserted into the guide hole 12 as shown in FIG. Insert the bottom edge. Then, the free movement of the joint nut 1 is restricted, and the lower end of the screw portion 19a immediately coincides with the upper female screw hole 11. Then, the joint nut 1 is rotated. Then, while directly checking the screwed state of the anchor bolt 19 with respect to the joint nut 1 through the opening 9, the anchor bolt 19 is screwed to a predetermined length to obtain the state shown in FIG.

Next, the upper end of the suspension bolt 24 is screwed into the female screw hole 14 below the joint nut 1 to a predetermined length and attached as shown. Also at this time, work is performed while directly checking the threaded state of the suspension bolt 24 with respect to the joint nut 1 through the opening 9.

In the illustrated embodiment described above, an example in which the anchor bolt 19 and the suspension bolt 24 are connected via the joint nut 1 has been shown. However, the present invention is not limited to connecting the anchor bolt 19 and the hanging bolt 24, and although not shown, for example, a hanging nut used for hanging a cable rack or a steel pipe from the ceiling is connected to each other. It can be connected via 1 in the same way as described above.

In the illustrated embodiment described above, the joint nut 1 has a rectangular frame shape. However, in the present invention, the joint nut 1 is not limited to the rectangular frame shape, and may have another frame shape (not shown).

Further, in the above-described illustrated embodiment, the protruding length of the protruding portions 10 and 14 is set to be several times the plate thickness a of the metal plate. However, the present invention is not limited to the illustrated embodiment, and the projecting length of the projecting portions 10 and 14 can be appropriately changed in design.

[0023]

[Effect of the invention]

 From the above, according to the joint nut of the present invention, an elongated metal plate is bent into a rectangular frame shape, and both ends of the metal plate are polymerized to form a superposed part and a width of the rectangular frame shape is formed. A frame body portion having openings on both sides in the direction; projecting portions projecting from each other on the overlapping portion and a frame surface facing the overlapping portion; upper and lower female screw holes provided on each of the projecting portions; Since it has a guide hole that is formed in the outer frame surface of the overlapping part and has a diameter larger than the above-mentioned female screw hole, the structure is simpler than the conventional nut that checks the screwed state by protruding the soft stopper. It can be provided at low cost, and a sufficient screwed state can be easily and surely confirmed through the opening. In addition, since the screw is screwed into the female screw hole having the increased number of pitches, the screwed state of the anchor bolt, the suspension bolt and the like and the joint nut can be strengthened, and a safe connection can be achieved. Further, since the anchor bolt is screwed into the female screw hole while being guided by the guide hole, the screwing operation can be easily performed even if the screwing portion between the anchor bolt and the joint nut is not visible.

In addition to the above, according to the joint nut of the second aspect, since the overlapping portion and the protruding portion protruding to the frame surface facing the overlapping portion are formed by burring processing, the formation of the protruding portion is easy. Can be

Further, according to the joint nut of the third aspect, it is possible to form a unit structure, and it is possible to make the handling convenient.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view of a joint nut according to an embodiment of the present invention in a use state.

FIG. 2 is a schematic cross-sectional view showing when a joint nut is screwed onto an anchor.

FIG. 3 is an overall perspective view of a joint nut.

FIG. 4 is a partially enlarged vertical cross-sectional view of an overlapping portion of a joint nut.

[Explanation of symbols]

 1 Joint nut 2 Frame part 3 Inner frame surface 4 Outer frame surface 5 Overlapped part 9 Opening part 10/14 Projection part 11/15 Female screw hole 12 Guide hole

Claims (3)

[Utility model registration claims] 1. A joint nut for interconnecting screw shafts such as anchor bolts and suspension bolts, wherein an elongated metal plate is bent into a rectangular frame shape, and both ends of the metal plate are polymerized to form a polymerized portion. And a frame body portion having openings formed on both sides in the width direction of the rectangular frame shape, projecting portions projecting from each other on the overlapping portion and the frame surface facing the overlapping portion, and each projecting portion. A joint nut comprising upper and lower female screw holes and a guide hole formed in the outer frame surface of the overlapping portion and having a diameter larger than the female screw hole. 2. In a joint nut for connecting screw shafts such as anchor bolts and suspension bolts to each other, an elongated metal plate is bent into a frame shape, and both ends of the metal plate are polymerized to form a polymerized portion. And a frame body portion having openings provided on both sides in the width direction of the frame shape, projecting portions projecting from each other by the burring process on the overlapping portion and the frame surface facing the overlapping portion, and each projecting portion. A joint nut comprising upper and lower female screw holes and a guide hole formed in the outer frame surface of the overlapping portion and having a diameter larger than the female screw hole. 3. A joint nut for interconnecting screw shafts such as anchor bolts and suspension bolts, wherein an elongated metal plate is bent into a frame shape, and both ends of the metal plate are polymerized to form a polymerized portion. And a frame body portion having openings provided on both sides in the width direction of the frame shape, projecting portions projecting from each other on the overlapping portion and a frame surface facing the overlapping portion, and upper and lower portions respectively provided on the respective projecting portions. A female screw hole and a guide hole formed in the outer frame surface of the overlapping portion and having a diameter larger than that of the female screw hole are provided, and the anchor is screwed into the upper female screw hole by being guided by the guide hole. A joint nut that is characterized by