JPH08260612A - Hang bolt fixture - Google Patents

Abstract

PURPOSE: To further reinforce fit-in and lower manufacturing cost by providing a general purpose hang bolt fixture which is easy to fix and definite to fit in. CONSTITUTION: A fit-in part 1, which is basically rectangular-shaped, has a spacing of a short-sided parallel part 11 and its length is substantially identical to the maximum width of a groove cross section. A pair of corners of opposite angles are cut diagonally, thereby forming a parallel part 12 of an oblique side. A wire spring 3 is projected from one parallel part 12 of the oblique side in an energized state. A hang bolt threaded hole 2 is installed at the central part of the fit-in part 1 while a detent is instal led in the end.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, for example, suspends a horizontal member such as a field edge, which is a base of the ceiling, in a dovetail groove of an attachment target member such as a deck plate or a keystone plate in the construction of a ceiling of a building. The present invention relates to a hanging bolt fastening metal fitting used for fastening a hanging bolt.

[0002]

2. Description of the Related Art When a floor plate on the upper floor is constructed with a deck plate or a keystone plate, the ceiling on the lower floor is hung by hanging a hanging bolt in a dovetail groove formed on the lower surface of the deck plate. The ceiling board is stretched by suspending a horizontal member such as a field edge at the lower end of the ceiling. Also,
This suspension bolt is also used to suspend various pipes in the ceiling.

As a metal fitting for attaching such a hanging bolt to a dovetail groove, various structures have been proposed in the past. For example, there is a hanging bolt fastening fitting described in Japanese Utility Model Laid-Open No. 4-61083. This is shown in FIG.
It is suitable for dovetail groove cross-sectional shape as shown in. That is,
The width between the inner side walls gradually increases from the opening 601 toward the bottom surface 602 of the groove.
From 03, the dovetail groove is such that the width dimension gradually decreases, and the dovetail groove cross-section maximum width is at the intermediate position 603. Attachment metal fitting 6 used for such a dovetail groove
As shown in FIG. 6, as shown in FIGS. 6B and 6C, a bolt screw insertion portion 612 provided with a temporary detent means,
And a protruding wing 613 that is abutted and locked to the inner wall of the dovetail groove.

The fitting into the dovetail groove is performed by the following procedure. After the hanging bolt 614 is screwed and set on the engaging metal fitting 611, one end of the overhanging blade is inserted into the dovetail groove while holding the hanging bolt below. Then, the other end of the overhanging blade is pushed over the dovetail groove opening edge 604 and forcedly pushed into the dovetail groove, and the engaging metal fitting 611 is engaged with the dovetail groove. then,
If the hanging bolt 614 is screwed in until the tip of the hanging bolt comes into contact with the bottom surface of the groove, the hanging bolt attachment metal fitting 611 is fitted and fixed in the dovetail groove by pressure contact with the inner wall of the dovetail groove.

Here, the temporary detent means is composed of, for example, a bulging portion 621 formed in the bolt screw inserting portion 612, whereby the distance between the side walls of the bolt screw inserting portion is equal to that of the hanging bolt. It is slightly smaller than the outer diameter.
For this reason, during the work of engaging the dovetail groove, the relative rotation of the fitting and the hanging bolt can be temporarily prevented, and the tip of the hanging bolt will not protrude more than necessary. On the other hand, after engaging with the dovetail groove, if the hanging bolt 614 is pushed up by utilizing the elasticity of the bolt screw insertion portion, the space between both side walls of the bolt screw insertion portion 612 becomes wider, and a large turning force is applied. The suspension bolt can be screwed into the dovetail groove by adding to.

[0006]

In the deck plate or the like, there is a dovetail groove cross-sectional shape in which the maximum width of the dovetail groove cross-section is at an intermediate position, and there is a vicinity of the dovetail groove bottom surface 501 as shown in FIG. Some have maximum width. In such a case, in the conventional hanging bolt fastening metal fitting 611, the overhanging blades 613 extend obliquely downward from both upper edge portions of the bolt screw insertion portion, respectively, so that the abutment groove inner wall is abutted. I can't stop.

The present invention has been made in view of the above problems, and it is easy to work even when the maximum width of the dovetail groove is at the intermediate position or at the bottom surface. An object of the present invention is to provide a versatile hanging bolt fastening fitting that is securely fitted.

It is another object of the present invention to provide a hanging bolt attachment fitting that can be more firmly fitted in the dovetail groove.

Further, it is another object of the present invention to suppress the increase of the manufacturing cost due to the achievement of the above object and to manufacture the manufacturing cost as low as possible.

[0010]

According to the invention described in claim 1, a fitting portion having a parallel portion which is at the position of the maximum width of the dovetail groove and which fits with the groove, is screwed with the suspension bolt, and temporarily. A threaded hole having a mechanical rotation preventing means, and a rotation blocking piece for allowing rotation in only one direction in the dovetail groove and blocking rotation in the opposite direction is provided at one end of the parallel portion, Rotation blocking portions for blocking the rotation of the rotation blocking piece in the rotation permitting direction in the dovetail groove are respectively provided diagonally to the other ends of the parallel portions, and the temporary detent means are provided with the dovetail groove. While preventing the relative rotation with the suspension bolt during the operation of engaging with the suspension bolt and preventing the tip of the suspension bolt from protruding from the upper surface of the fitting portion, a relatively large rotation after engagement with the dovetail groove. It is characterized in that relative rotation with the suspension bolt is allowed by rotation of the suspension bolt due to operating force. That.

In the invention described in claim 2, claim 1
In the hanging bolt fastening metal fitting described in (4), the rotation blocking pieces are provided at diagonally opposite ends of the parallel portion.

In the invention described in claim 3, claim 1
Alternatively, in the hanging bolt attachment fitting described in item 2, the rotation blocking piece projects outward from the fitting portion, and the temporary detent means is the upper surface of the fitting portion in the screw hole. It is characterized in that it has a detent wound around it.

[0013]

In the invention described in claim 1, the fitting portion is allowed to rotate in only one direction in the dovetail groove by the rotation preventing piece provided at one end of the parallel portion, and the fitting portion is rotated in the opposite direction. The movement is blocked, and the rotation blocking portion provided diagonally to the other end of the parallel portion blocks rotation of the rotation blocking piece in the rotation allowable direction. Therefore, when the fitting portion is rotated in the rotation permitting direction in the groove and the parallel portion of the fitting portion is parallel to the groove side wall, the rotation blocking piece and the rotation blocking portion will Rotation in the direction of will also be blocked. Therefore,
The fitting portion is engaged with the dovetail groove by performing an engaging operation to the dovetail groove, which is rotation in the dovetail groove.

The suspension bolt is screwed into the screw hole and moves in the axial direction of the screw hole by the screw action. However, the screw hole has a temporary anti-rotation means, which prevents relative rotation with the suspension bolt when engaging with the dovetail groove and prevents the tip of the suspension bolt from protruding from the upper surface of the fitting part. On the other hand, the relative rotation with the suspension bolt is allowed by the rotation of the suspension bolt by the relatively large rotational operation force after the engagement with the dovetail groove.

That is, in the engaging operation to the dovetail groove, the hanging bolt is screwed into the screw hole, but the tip of the hanging bolt is projected from the upper surface of the fitting portion on the bottom side of the dovetail groove by the temporary anti-rotation means. There is no. Here, in the case of a special dovetail groove cross section in which the maximum width of the dovetail groove cross section is at the bottom surface of the dovetail groove, the fitting part must be rotated while the top surface of the fitting part is in contact with the bottom surface of the dovetail groove. However, since the tip of the hanging bolt does not project from the upper surface of the fitting portion as described above, such an engaging operation is possible.

Further, in the operation of engaging with the dovetail groove, the relative rotation with the suspension bolt is prevented by the temporary detent means, so that the fitting portion is directly held for turning the dovetail groove. Even if it does not exist, if the fitting portion is put in the dovetail groove and the hanging bolt is turned, the fitting part is also turned in the dovetail groove accordingly.

Further, after the engagement with the dovetail groove, the relative rotation between the fitting portion and the suspension bolt is prevented by press-fitting the suspension bolt, so that such relative rotation is allowed. Since the tip of the hanging bolt protrudes from the upper surface of the fitting part, the hanging bolt can be rotated even if the dovetail groove cross section has the maximum width of the dovetail groove section and is far from the groove bottom surface. Then, the tip of the groove moves to the bottom surface of the groove due to the screw action, and then comes into close contact. Further, even if the hanging bolt rotates in the opposite direction, the fitting portion does not rotate, and therefore the fitting portion does not come off from the groove. By the above operation, the fitting portion is fitted and fixed to the dovetail groove regardless of the position of the maximum width of the dovetail groove cross section.

According to the second aspect of the present invention, since the rotation preventing pieces are provided at the respective one ends of the parallel portions, and the positional relationships thereof are diagonal, the rotation permitting direction in the dovetail groove is reversed. Blocking in the direction becomes more reliable.

According to the third aspect of the invention, the rotation preventing piece is one that protrudes outward from the fitting portion.
Reasonably prevent rotation in the direction opposite to the rotation allowance direction. Further, as the temporary anti-rotation means, anti-rotation scratches provided near the upper surface of the fitting portion in the screw hole are used, and such anti-rotation scratches are formed by an easy method such as a dent by a punch. . Therefore, the structure of the hanging bolt attachment fitting according to the present invention is simplified.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of a hanging bolt attachment fitting according to the present invention. FIG. 1A is a plan view and FIG.
[Fig. 3] is a perspective view seen from diagonally above. The plan shape of the hanging bolt attachment fitting is basically rectangular, and this portion constitutes the fitting portion 1.

The fitting portion 1 is located at the position of the maximum width of the dovetail groove, and the interval dimension (the length of the long side) of the parallel portion 11 of the short side is defined as the maximum width of the dovetail groove cross section so as to fit with the groove. In addition, a pair of diagonally opposite corners of the rectangle are cut out diagonally by approximately half of the short side and the long side to form a parallel portion 12 of the oblique side.

From another point of view of this shape, an oblique side parallel part 12 shorter than the interval dimension of the short side parallel part 11 is formed, and a part having a longer interval than that is not cut. There will be only a pair of corners 13. Therefore, if the hanging bolt attachment fitting is rotated in the arrow direction 14 from the side of the parallel part 12 of the oblique side in the dovetail groove, when the parallel part 11 of the short side becomes parallel to the inner wall of the groove, a pair of The corners 13 prevent further rotation. In this way, the rotation blocking portion is configured.

A rising portion 15 is provided on the outer periphery of the fitting portion 1 in the long side direction as shown in FIG.
1 has no rising portion. Although the rigidity of the hanging bolt attachment fitting is increased by the provision of the rising portion 15, the slope portions 16 are provided on both sides of the attachment bolt during the attachment work to the dovetail groove. This is to avoid interference with the product and to increase product strength. Further, the reason that the parallel portion 11 on the short side is not provided with the rising portion is that the shape of the end surface of the dovetail groove is taken into consideration in order to ensure fitting with the inner wall of the dovetail groove.

A threaded hole 2 having the same diameter as the outer diameter of the hanging bolt is provided in the center of the fitting portion 1, and a wire spring 3 is bent around the wire spring 3 sandwiched between the rising portions 15. It is located in. That is, one end 31 of the wire spring penetrates the rising portion 15 and extends outward so as to be substantially perpendicular to the parallel portion 12 of the hypotenuse, and the tip thereof is substantially perpendicular to the direction opposite to the arrow direction 14. It's bent. on the other hand,
The tip portion of the other end is pressed against the inner wall of the rising portion 15 on the opposite side, and the wire spring 3 always holds the spring force in the arranged state.

In the dovetail groove, when the hanging bolt attachment fitting is rotated in the arrow direction 14 against the spring force of the wire spring 3, one end 31 of the wire spring is moved to the dovetail groove as shown in FIG. The inner wall 41 bends, and as shown in FIG. 7B, the pair of corners 13 prevent the rotation in the arrow direction 14, and the operation described below also prevents the rotation in the opposite direction. To be done.

That is, due to the spring force due to the bending with the inner wall 41 of the dovetail groove, the tip portion 32 of the wire spring is provided with the inner wall 4 of the dovetail groove 4.
When the wire spring 3 is pressed against the wire spring 1 and is attempted to rotate in the opposite direction, the tip end 32 of the wire spring bites the dovetail inner wall 41, and the wire spring 3
It attempts to prevent such rotation and acts as a detent stopper. In this way, the rotation blocking piece is configured.

The shape of the end face of the tip portion 32 is the dovetail groove inner wall 41.
It is preferable to make a diagonal cut in order to improve the bite with. In addition, as shown in FIG. 3 (a), if there are two wire springs 3 and their arrangement is diagonal in the fitting portion 1,
The rotation blocking force becomes stronger and the fitting becomes stronger. Further, if the shape shown in FIG. 3B is used instead of the two wire springs 3, the same effect can be obtained even if only one wire spring 3 is provided. It is possible to reduce the number of parts and to simplify the assembling work while strengthening the connection.

The thickness of the wire spring, the length of the tip portion, the amount of bending when arranging the wire spring, and the possibility of using springs other than the wire spring are appropriately determined in consideration of the cross-sectional shape of the dovetail groove, the usage situation, and the like. Just do it.

As shown in FIG. 4A, the screw hole 2 is provided with three anti-rotation scratches 21. The same figure is shown in FIG.
(A) is seen from the back. The anti-rotation scratch 21 is for partially crushing the screw thread in the screw hole to partially deform the screw groove, and its state is shown in (b) as a cross-sectional view of FIG. 4 (a). . This detent scratch 21 is
For example, it can be formed by making a dent scratch using a simple tool such as a punch. It should be noted that the position and the number of the anti-rotation scratches 21 may be appropriately determined.

The suspension bolt moves along the axial direction of the screw hole 2 due to the rotation, but if there is a detent scratch 21, it cannot move further in the screw hole. On the other hand,
If the force for rotating the suspension bolt becomes larger than before, it is possible to overcome the resistance due to the partial deformation of the screw groove and further move the suspension bolt along the axial direction of the screw hole.

That is, when the turning force of the suspension bolt is relatively small, the suspension bolt can be moved along the axial direction of the screw hole 21 up to the position where the anti-rotation scratch 21 exists, but it can be moved beyond that. I can't let you do it. When the turning force of the suspension bolt is relatively large, it can be moved further. In this way, the temporary detent means is constructed. The position and the number of the anti-rotation scratches 21 may be appropriately determined according to the dovetail groove cross-sectional shape, the thread diameter of the hanging bolt, and the like.

Since the anti-rotation scratches 21 are provided, it is possible to save the labor of separately mounting the hanging bolt attachment fitting and the hanging bolt, and to install both of them at once. The work of engaging the dovetail groove is performed as follows.

First, the end of the hanging bolt is prevented from rotating 21
Insert the suspension bolt into the screw hole 2 and rotate it until it reaches. After that, insert the fitting part 1 into the dovetail groove provided on the deck plate of the upper ceiling by holding the hanging bolt, and further confirm that the fitting part 1 is at the position of the dovetail groove cross-section maximum width. Rotate. At this time, 2
Since the relative rotation between the suspension bolt and the fitting portion 1 is blocked by 1, the fitting portion 1 also rotates and is finally attached in the state shown in FIG. 2B.

When the suspension bolt is rotated with a larger turning force, the rotation preventing scratch 21 allows relative rotation with the suspension bolt, so that the suspension bolt moves along the axial direction of the screw hole 2. Will be done. Therefore, if the suspension bolt continues to rotate, the tip of the suspension bolt will eventually reach the groove bottom surface.
It can be hung firmly from a deck plate.

Further, after the relative rotation with the suspension bolt is permitted, the rotating force is not transmitted to the fitting portion 1, and the fitting portion 1 is securely held by the wire spring 3 in the groove. Since it is worn, even if the suspension bolt rotates in the opposite direction, it does not fall out of the groove due to the rotating portion 1.

As described above, the suspension bolt can be securely and easily attached to the deck plate. Since the fitting portion 1 has a simple structure as shown in FIG. 1 and is not required to have elastic properties as in the prior art, the manufacturing method thereof is not only shaving by cutting but also casting. It is also possible, and the manufacturing cost can be significantly reduced when manufacturing in large quantities.

[0037]

According to the invention described in claim 1, the hanging bolt is held while the fitting portion in which the hanging bolt is screwed into the screw hole is held at a position in the dovetail groove having the maximum width of the dovetail groove cross section. By continuing to rotate the hook in the rotation allowance direction, the hanging bolt attachment fitting according to the present invention can be easily fitted into the dovetail groove. Further, the fitting is surely performed regardless of the position of the maximum width of the dovetail groove cross section, even if the maximum width of the dovetail groove cross section is on the bottom surface of the groove. It is possible to add versatility to the bolt fastening metal fittings.

According to the invention described in claim 2, fitting in the dovetail groove can be performed more firmly.

According to the invention described in claim 3, since the structure of the hanging bolt attachment fitting according to the present invention is simplified, the manufacturing and assembling of the component parts are facilitated, and the effects as described above are obtained. The manufacturing cost can be reduced while maintaining the above.

[Brief description of drawings]

1A and 1B are an explanatory view and a perspective view showing an external appearance of an embodiment of a hanging bolt attachment fitting according to the present invention as viewed from the front side.

FIG. 2 is a cross-sectional explanatory view showing a state change when actually mounting an example of the hanging bolt fastening fitting according to the present invention when the hanging bolt fastening fitting is fastened to the dovetail groove.

FIG. 3 is a cross-sectional explanatory view showing a state in which another embodiment of the hanging bolt attachment fitting according to the present invention is actually attached to a dovetail groove.

FIG. 4 is an explanatory view showing an appearance and a cross section of a screw hole as seen from the back surface side of an embodiment of the hanging bolt attachment fitting according to the present invention.

FIG. 5 is an explanatory diagram showing a dovetail groove cross-sectional shape.

FIG. 6 is an explanatory view showing a cross-sectional shape of a dovetail groove and an appearance of a hanging bolt attachment fitting for explaining a conventional technique.

[Explanation of symbols]

 1 ... Fitting part 11 ... Short side parallel part 12 ... Oblique side parallel part 13 ... A pair of corner parts 14 ... Arrow direction (rotating direction) 15・ ・ ・ Rising part 16 ・ ・ ・ Sloping part 2 ・ ・ ・ Screw hole 3 ・ ・ ・ Line spring 31 ・ ・ ・ ・ One end of the line spring 32 ・ ・ ・ ・ ・ ・ Tip of the line spring

Claims (3)

[Claims] 1. A parallel connecting part having a parallel part which is located at the maximum width of the cross section of the dovetail groove and fits with the groove, and a screw hole which is screwed with the suspension bolt and has a temporary detent means, One end of the parallel section is provided with a rotation blocking piece that allows rotation in only one direction in the dovetail groove and prevents rotation in the opposite direction. Are provided with rotation blocking portions for blocking the rotation of the rotation blocking piece in the rotation permitting direction, and the temporary detent means prevent the relative rotation with the suspension bolt during the engaging operation to the dovetail groove. While blocking and preventing the tip of the suspension bolt from protruding from the upper surface of the fitting portion, the suspension bolt is rotated by a relatively large rotational operation force after being engaged with the dovetail groove, so that the suspension bolt is rotated relative to the suspension bolt. A hanging bolt fastening metal fitting that allows rotation. 2. The hanging bolt attachment fitting according to claim 1, wherein the rotation blocking pieces are provided at diagonally opposite ends of the parallel portion. 3. The rotation preventing piece is projected from the fitting portion to the outside, and the temporary detent means has a detent scratch in the screw hole near the upper surface of the fitting portion. The hanging bolt attachment fitting according to claim 1 or 2, characterized in that.