JPH0681423A - Metal fixture for hang bolt - Google Patents

Abstract

PURPOSE:To provide a metal fixture for hang bolts which has a sufficient temporary fixing capacity and reduces the production cost. CONSTITUTION:In a metal fixture 20 for a hang bolt provided with a cylindrical nut 21 having a collar 24, which can be fitted by inserting in a dovetail groove and rotating by almost 90 degrees, and a flexible rotation-prohibiting member 22 preventing the cylindrical nut 21 from rotating by inserting in the dovetail groove, the cylindrical nut 21 is provided with a conical spring 23 which contacts the outer edge of the dovetail groove and fixes the cylindrical nut and the large diameter part serves as the rotation-prohibiting member by the contact thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to suspending bolts in a dovetail groove of a deck plate when suspending various pipes, ducts, etc. from a deck plate used for forming a ceiling or floor of a building. The present invention relates to a hanging bolt fastening metal fitting.

[0002]

2. Description of the Related Art Regarding the technique of forming a ceiling or floor of a building by using a deck plate or the like, a formwork can be omitted and construction is quick and easy. Since it is possible to reduce the weight, it has been widely used in recent years. Along with this, many types of suspension bolt attachment fittings have been proposed and used to attach suspension bolts used when suspending various pipes, ducts, etc. from deck plates to the dovetail groove of the deck plate. Has been done.

An example of such a hanging bolt attachment fitting is
For example, there is one as shown in FIG. 5 (Japanese Patent Laid-Open No. 3-241).
No. 141). The locking tool 1 includes a locking tool body 3 provided with a female screw 2 into which a hanging bolt M is screwed, and a rotation-preventing leaf spring 4. The locking tool body 3 is inserted into a dovetail groove. Then, the detent leaf spring 4 is fitted into the dovetail groove when the engaging body 3 is engaged with the dovetail groove. A detent piece 5 that prevents the body 3 from rotating is provided. The detent leaf spring 4 bends to displace the detent piece 5 when the locking body 3 is pushed into the dovetail groove and rotates at a substantially right angle, and the locking tool body 3 moves in the dovetail groove. When engaged, the anti-rotation piece 5 is returned in the opposite direction and fitted in the dovetail groove.

The outlet of the female screw 2 is closed by a shield wall 6, and the other end of the hanging bolt M screwed into the shield wall 6 until one end contacts the shield wall 6 is rotated at a substantially right angle. The tool body 3 can be rotated together and engaged with the dovetail groove. Further, the shield wall 6 can be broken by strongly screwing the suspension bolt M. After the locking tool body 3 is engaged with the dovetail groove, the shield wall 6 is destroyed and the suspension bolt M is further screwed. Then, when the tip is brought into pressure contact with the inner wall of the dovetail groove, the locking tool body 3 is crimped to the inside of the dovetail groove by the reaction force, and the suspension bolt M is fixed in the dovetail groove.

FIG. 6 shows another conventional example,
A flexible nut that is inserted into the dovetail groove and prevents rotation of the tubular nut 8 by being inserted into the dovetail groove and provided with a flange 7 that is adapted to enter the dovetail groove and rotate substantially at right angles to be engaged therewith. It is provided with a locking piece 9 having sex. The locking piece 9 bends and displaces itself when the collar portion 7 is inserted into the dovetail groove and rotates at a substantially right angle, and when the collar portion 7 engages with the dovetail groove, it is urged by itself. In this example, the guide part 10 is provided integrally with the locking piece 9,
The guide portion 10 is rotated to rotate the tubular nut 8 and the collar portion 7.
Is to rotate.

[0006] However, in the hanging bolt fastening fittings as described above, the structure is simple and the number of parts is small, which is advantageous in manufacturing, but it is unstable in actual use. That is, in the state where the hanging bolt fastening metal fitting is simply engaged with the dovetail groove, that is, in the state before the hanging bolt M is screwed into and abuts against the back wall of the dovetail groove and is fixed,
The mounting hardware for the hanging bolt moves along the dovetail groove, and the shaft core into which the hanging bolt M is screwed in moves in various directions, resulting in an unstable state. There was a problem that was difficult.

In the first place, when fixing the suspension bolt to the ceiling, since the mounting location is high, the operator operates the lower end of the suspension bolt to remotely locate and engage it, and then screw the suspension bolt. It is extremely unstable work such as inserting and fixing, or a worker climbing up with a scaffold to determine the position while pressing the attachment metal for the hanging bolt and screwing in the hanging bolt, and the positioning is reliable and There has been a strong demand for fastening bolts for hanging bolts that can be easily fixed.

FIG. 7 shows still another conventional example (see Japanese Utility Model Laid-Open No. 4-10113). In order to eliminate the above-mentioned problems, the tubular nut is inserted in the dovetail groove. Overhang wing 1 for preventing rotation of 11 and engaging head 12
3, the flange surface 14 is integrally provided,
The flange surface 14 holds the both edges of the dovetail groove together with the engaging head 12 by the urging force of the spring 15, so that the attachment fitting 16 can be temporarily fixed to the dovetail groove.

However, by temporarily fixing the engaging metal fitting 16 in the dovetail groove in this manner, the unstable state as described above can be solved to some extent, but the flange surface 14 is flat. Since the surface contact with both edges of the dovetail groove, the limit of the frictional force is low, and there was another shortage of temporary fixing ability. Also, the overhang wing 13
However, there is a problem in that the component in which the flange surface 14 is integrally provided has a complicated shape and the manufacturing cost increases.
In addition, parts other than the locking tool body 3 and the tubular nuts 8 and 11, that is, members for restricting rotation, springs, and spring supports are used when the hanging bolt fittings are fitted to the dovetail groove. Since it is necessary only and is not necessary at all after the engagement, it has been required to simplify as much as possible to reduce the manufacturing cost.

The present invention has been made by paying attention to the conventional technique and the present situation as described above, and provides an attachment metal fitting for a hanging bolt which has a sufficient temporary fixing ability and can reduce the manufacturing cost. It is something to do.

[0011]

In order to solve the above-mentioned problems, the hanging bolt fastening metal fitting of the present invention is provided with a collar portion which can be inserted into the dovetail groove and can be engaged by rotating at a substantially right angle. In a hanging bolt attachment fitting comprising at least a tubular nut provided with the flexible nut, which is inserted into the dovetail groove and prevents the tubular nut from rotating, a hook is attached to the tubular nut. It is provided with a spring that abuts the outer edge of the groove and fixes the tubular nut. In addition, regardless of whether or not the rotation restricting member has flexibility, in the hanging bolt fastening metal fitting as described above, the tubular nut is fixed to the tubular nut by contacting the outer edge portion of the dovetail groove. In addition, one end of the rotation restricting member is held in contact with the rotation restricting member, and a spring for urging the rotation restricting member in the direction of the flange is provided. Further, the rotation restricting member has flexibility. It has become a thing. Further, the springs of the attachment fittings for hanging bolts have a conical shape with a large diameter at one end on the flange side.

In the above description and the following description, "flexibility" means that when an external force is applied, the shape is changed by bending,
It is used as a term that means the property of returning to the original shape when the external force is removed, and "conical shape" means a shape of a spring with one end having a large diameter and the other end having a small diameter. Is used as.

[0013]

In the hanging bolt fastening metal fitting of the present invention, the spring provided on the tubular nut abuts the outer edge of the dovetail groove in line contact, thereby fixing the tubular nut with a strong frictional force. It is possible to make the state in which the hanging bolt fastening metal fitting is engaged with the dovetail groove more stable. If one end of this spring is held in contact with the rotation restricting member and the rotation restricting member is biased toward the flange,
Regardless of whether or not the rotation restricting member has flexibility, only the relative rotation with respect to the tubular nut can be blocked, and the relative movement in the axial direction can be made possible. Since it is not necessary to fix the nut, it is possible to easily assemble and manufacture. Further, it is not necessary to fix the other end of the spring to the tubular nut, and the other end can be locked to some simple spring receiving means and can be interposed between it and the rotation restricting member. ， Manufacturing can be facilitated.

Further, when the rotation restricting member is flexible, the rotation restricting member is opposed to the tubular nut regardless of whether it is fixed to the cylindrical nut. Only the rotation is prevented, and the rotation restricting member itself bends, whereby the axial relative movement range can be omitted and the length of the tubular nut can be shortened. And further,
If the springs of these metal fittings for suspension bolts have a conical shape with a large diameter at one end on the flange side, increase the length of the liner contact with the outer edge of the dovetail groove. The tubular nut can be fixed with a stronger frictional force. On the other hand, the other end of the spring has a small diameter. It can be small.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. The same members are designated by the same reference numerals, and duplicate description will be omitted. FIG. 1 shows an attachment fitting 20 for a hanging bolt according to the present invention, which is a tubular nut 2 into which a hanging bolt M is screwed.
1, a flexible rotation restricting member 22 is attached, and a conical spring 23 is provided.

The upper portion of the tubular nut 21 is provided with a collar portion 24 having a vertical dimension and a lateral dimension narrower than the width dimension of the dovetail groove, and the lower surface of the collar portion 24 has a tapered shape corresponding to the groove shape of the dovetail groove. Has become. By having such a shape, the collar portion 24 can be inserted into the dovetail groove and can be engaged by rotating at a substantially right angle.

The rotation restricting member 22 is made of a flexible material, and a locking plate 26 having a pair of left and right locking pieces 25 is fixed to the flange 24 of the tubular nut 21 adjacent thereto.
Both ends of the locking piece 25 are widened along the direction of the narrow vertical dimension of the collar portion 24, and are bent when the collar portion 24 is inserted into the dovetail groove and rotated at a substantially right angle. When the collar 24 is displaced and is engaged with the dovetail groove, it is restored to its original shape and is inserted into the dovetail groove so that rotation of the tubular nut 21 and the collar part 24 is blocked. Has become. The small diameter portion 27 of the conical spring 23 is fixed to the lower end portion of the tubular nut 21, while the large diameter portion 2 of the spring 23 is fixed.
The reference numeral 8 is positioned so as to surround the two locking pieces 25 and center around the collar portion 24.

Due to the above-mentioned structure, FIG.
When the hanging bolt fastening fitting 20 is engaged with the dovetail groove as shown in FIG. 5, the large diameter portion 28 of the spring 23 is in pressure contact with both edges of the dovetail groove. Since the spring 23 is linear and its contact state is line contact, the frictional force is large, and the hanging bolt fastening metal fitting 20 in a state where it is simply engaged with the dovetail groove is strongly and temporarily fixed. It is possible to obtain a more stable state. Reference numeral 29 denotes a spring receiver, which is used to attach the spring 23 to the tubular nut 21 by caulking and fixing the small diameter portion 27 of the spring 23 and fixing the spring receiver 29 to the lower end portion of the tubular nut 21. Is.

By forming the spring 23 into a conical shape in this way, it is possible to increase the length of the large-diameter portion 28 that comes into line contact with the outer edge of the dovetail groove, and to provide a stronger frictional force. On the other hand, in the small diameter portion 27, the spring receiver 29 for attaching to the tubular nut 21 can be made small.

Reference numeral 30 denotes a resistor, which prevents the screw of the suspension bolt M from being normally screwed, and can be broken by a screw input of more than normal. By rotating the other end of the hanging bolt M screwed into the resistor 30 until one end abuts, the tubular nut 21 can be rotated together and engaged with the dovetail groove. Then, the suspension bolt can be broken by screwing the suspension bolt with a screw input more than usual, that is, a strong screw input, and the cylindrical nut 21 is engaged with the dovetail groove and then destroyed to further suspend the suspension bolt M. When the tip is screwed in and brought into pressure contact with the inner wall of the dovetail groove, the cylindrical nut 21 is pressed against the inside of the dovetail groove by the reaction force, and the suspension bolt M is fixed in the dovetail groove.
At the same time, the resistor 30 prevents dust and dirt from entering and protects the female screw.

FIG. 3 shows another embodiment, in which the large diameter portion 28 of the conical spring 23 provided in the hanging bolt attachment fitting 31 is held in contact with the rotation restricting member 32 and is rotated. The movement restricting member 32 is biased toward the flange portion, while the small diameter portion 27 is held in contact with a spring receiver 29 fixed to the tubular nut 21, and the spring 23 is restricted in rotation. It is in a state where it is only intervened and locked between the member 32 and the spring receiver 29. As a result, the spring 23
The small diameter portion 27 does not need to be caulked and fixed to the spring receiver 29, and the manufacturing can be further facilitated.

The rotation restricting member 32 is inserted into the dovetail groove by the urging force of the spring 23. Therefore, the rotation restricting member 32 has a tubular shape regardless of whether it has flexibility or not. Only the relative rotation with respect to the nut 21 is blocked, and the relative movement in the axial direction can be made possible. That is, as shown in FIG. 4, the rotation restricting member 32 is provided with a hexagonal through hole 33, and the body portion of the tubular nut 21 also having a hexagonal columnar shape is inserted into the through hole 33 to be assembled. When the collar portion 24 is pushed into the dovetail groove and rotated at a substantially right angle, the collar portion 24 is slid and displaced, and when the collar portion 24 is engaged with the dovetail groove, the urging force of the spring 23 causes It returns to the original position and is inserted into the dovetail groove to prevent the cylindrical nut 21 from rotating. As a result, it is not necessary to fix the rotation restricting member 32 to the tubular nut 21, and manufacturing can be facilitated.

Also, in this embodiment, the rotation restricting member 3
When 2 is made flexible, regardless of whether or not it is fixed to the tubular nut 21, only the relative rotation with respect to the tubular nut 21 is blocked as in the above embodiment. ,
When the rotation restricting member 32 itself bends, a relative range of movement in the axial direction, that is, a length range for sliding the cylindrical nut 21.
Can be omitted. As a result, the tubular nut 2
The length dimension of 1 can be made short, and economic efficiency can be improved.

It should be noted that the rotation restricting member is not limited to these examples when it is fixed to the tubular nut or the cylindrical nut is inserted and assembled. For example, the rotation restricting member is integrally formed with the tubular nut. In addition to the possibility of molding, there are various conceivable possibilities such as the through hole of the rotation restricting member and the shape of the tubular nut body being quadrangular or elliptical.

[0025]

The fastening metal fitting for a suspension bolt according to the present invention has the contents described above, and the spring provided in the tubular nut comes into strong contact with the outer edge of the dovetail groove in line contact. It is possible to fix the tubular nut with frictional force, and it is possible to make the state in which the hanging bolt fastening metal fitting is engaged with the dovetail groove more stable, the positioning is reliable,
Moreover, the fixing work becomes much easier. Further, if one end of the spring is held in contact with the rotation restricting member and the rotation restricting member is biased toward the flange portion, the rotation restricting member needs to be fixed to the tubular nut. Is removed,
The manufacturing can be facilitated, and it is not necessary to fix the other end of the spring to the tubular nut, so that the assembly and the manufacturing can be further facilitated. Further, in the case where the rotation restricting member is flexible, the rotation restricting member itself bends to reduce the relative movement range in the axial direction and to reduce the length of the cylindrical nut. The economy can be improved. Furthermore, when the spring has a conical shape, a stronger fixing force can be obtained, and the spring receiver for attaching to the tubular nut can be made small, thereby reducing the manufacturing cost. be able to.

[0026]

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a side view showing a usage state of the embodiment of the present invention shown in FIG.

FIG. 3 is a side view showing another embodiment of the present invention.

FIG. 4 is an exploded perspective view of the embodiment shown in FIG.

FIG. 5 is a sectional view and a side view showing a conventional example.

FIG. 6 is a perspective view showing another conventional example.

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

[Explanation of symbols]

 20, 31 ...... Attachment bolt for hanging bolt 21 ...... Cylindrical nut 22, 32 ...... Rotation restriction member 23 ...... Spring 24 ...... Collar part

Claims (4)

[Claims] 1. A tubular nut having a flange portion that is inserted into the dovetail groove and can rotate and engage at a substantially right angle, and a flexible nut that is inserted into the dovetail groove and prevents the tubular nut from rotating. A fitting for a hanging bolt, comprising at least a flexible rotation restricting member, wherein the tubular nut is provided with a spring that abuts an outer edge portion of the dovetail groove to fix the tubular nut. Attachment metal fittings for hanging bolts. 2. A tubular nut provided with a flange portion that projects into the dovetail groove and can rotate and engage at a substantially right angle, and a rotation that is inserted in the dovetail groove and prevents the rotation of the tubular nut. In the hanging bolt fastening metal fitting including at least a regulating member, the tubular nut is fixed to the tubular nut by abutting the outer edge of the dovetail groove, and one end of the tubular nut abuts and is held by the rotation regulating member. An attachment metal fitting for a hanging bolt, comprising a spring for urging the motion restricting member toward the flange portion. 3. The attachment fitting for a hanging bolt according to claim 2, wherein the rotation restricting member is flexible. 4. The attachment fitting for a hanging bolt according to claim 1, wherein the spring has a conical shape with one end on the flange side having a large diameter.