JPH10317643A - Steel floor post - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance structural strength on one hand and to facilitate the molding of a female screw on the other hand for a bearing bar body in a steel floor post. SOLUTION: A steel floor post is so constituted that forward and reverse male screws 3 erected to a holding plate 1 and a base plate 2 are respectively screwed in forward and reverse female screws 7 formed in both ends of a bearing bar body 6 to connect them in a height adjustable manner. Then, the female screws 7 are so constituted that a plurality of recessed threads 18 and projected threads 19 extended to the longitudinal direction from the end face 15 of the bearing bar body 6 are alternately arranged to the circumferential direction of the bearing bar body 6 and that thread grooves 17 are formed to the insides of the recessed threads 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor bundle for supporting a large building (a cross-bar supporting a joist under a floor) in a wooden building.

[0002]

2. Description of the Related Art Conventional steel floor bundles are registered in Utility Model Registration No. 3031.
As can be seen in Japanese Patent Application Publication No. 622, a structure having a generally L-shaped receiving plate and a base plate connected in a side view by a support rod having a turnbuckle structure is generally used. This steel floor bundle is mounted on a bracelet or the like in a state in which male and female threads on the receiving plate and the base plate are screwed with female and female threads formed on both ends of the support rod. The base plate is fixed, and the length from the base plate to the receiving plate, that is, the height of the steel floor bundle is adjusted by turning the support rod. After the adjustment, tighten the nuts screwed into each male thread to the supporting rod to fix the height, and nail the receiving plate from the outside to the supporting plate addressed to the lower corner of the large oval. In order to prevent misalignment between the pulling and the steel floor bundle.

[0003]

The support bar in the conventional steel floor bundle has a thick middle portion so that it can be easily turned when it is turned for height adjustment. The end portion on which the female screw portion for screwing the screw portion is formed has a shape narrowed in accordance with the male screw portion. The load applied to the steel floor bundle is applied to the end face of the support rod through nuts screwed into the male threads of each plate, but the end face of the support rod with the narrowed ends as described above has a small diameter. Therefore, it has been pointed out that the contact area with the nut is reduced, and the nut must be supported near the inner peripheral edge, and the load resistance is deteriorated.

Further, a thread groove of a female screw portion for screwing a male screw portion of each plate must be formed at an end of the support rod body. For example, a screw is formed by tightening a tap from an end face. The most troublesome work of forming the groove was required. In addition, since female threads are required at both ends of the support rod, the labor, time, and cost of the work related to the formation of the thread groove occupy a large proportion in the production of the steel floor bundle. Therefore, in order to develop a steel floor bundle in which the load resistance is improved and the manufacturing cost is reduced by suppressing the working ratio of forming the female screw portion, the study is repeated.

[0005]

As a result of the examination, the developed male and female external threaded portions erected on the receiving plate and the base plate are respectively screwed into the female and female female threaded portions formed on both ends of the support rod. In the steel floor bundle connected to be adjustable in height, the female screw portion is provided with a plurality of concave and convex strips extending in the longitudinal direction from the end face of the support rod body and arranged alternately in the circumferential direction of the support rod body. This is a steel floor bundle in which a thread groove is formed on the inner surface of the concave strip.

In the steel floor bundle of the present invention, the outer diameter of the end face is conventionally reduced by alternately arranging a plurality of concave or convex strips extending in the longitudinal direction from the end face of the support rod in the circumferential direction of the support rod. The rigidity at the end face can be increased by making this end face a substantially polygonal or star-shaped end face, and a decrease in the load resistance of the support rod body can be suppressed or the load resistance can be increased. In this female screw portion, since the screw groove is formed on the inner surface of the concave strip, the diameter of the male screw portion can be made substantially equal to that of the conventional steel floor bundle.

For the ridges, valleys and thread grooves constituting the female screw portion, a tap is inserted into the end of the support rod, and the position and number of the press are determined in accordance with the position and number of thread rows of the tap. Then, pressing is performed so that the concave streak is provided at the portion corresponding to the thread row, thereby forming them at once.
In general, taps are arranged with thread rows intermittently in the circumferential direction, so by turning the taps to the minimum necessary after forming the thread groove, the thread row matches the ridge, and the taps can be easily inserted. Can be taken out.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a front view of a steel floor bundle according to the present invention, FIG. 2 is a side view thereof, FIG. 3 is a plan view of a receiving plate 1, and FIG. 4 is a plan view of a base plate 2. As can be seen from FIGS. 1 and 2, the floor bundle of this embodiment has a right-handed male thread 3 on a receiving plate 1 and a left-handed male thread 3 on a base plate 2. With the nut 4 and the washer 5 attached to the female screw 3, the male screw part 3 is screwed into each of the female screw parts 7 corresponding to both ends of the support rod 6 formed by processing a round pipe, thereby forming a turnbuckle structure.

Each side of the receiving plate 1 which is substantially L-shaped when viewed from the side is directed to the bottom surface and the side surface of the enlarger 8 (see a two-dot chain line in FIG. 1).
The puller 8 is driven into the nail hole 9 to fix the puller 8. A rubber or resin packing 11 is fitted in the nail hole 9,
The receiving plate 1 and the puller 8 are buffered, and the nail 10 is held by the packing 11 to facilitate driving. Further, in the receiving plate 1 of the present embodiment, the rigidity is increased by folding both side edges downward and forming the rib grooves 12. The flat base plate 2 is placed on a bunch of stones or the like (not shown), and nails or anchors are nailed into the nail holes 9 or an adhesive or the like is poured into the flat base plate 2 and fixed. A rib groove 12 is also formed in this base plate to increase rigidity. The height of the floor bundle is adjusted by turning the support rod body 6 to the right or left to expand or contract the distance between the receiving plate 1 and the base plate 2, and after completing the adjustment, tightening the nuts 4, 4 to adjust the height of the floor bundle. Restrain.

FIG. 5 is an enlarged perspective view showing the female screw portion 7 of the support rod 6 of this embodiment, and FIG. 6 is a state in which a tap 14 is inserted into an opening 13 at the end of the support rod 6 and pressed. FIG. 7 is an end view of the first step), and FIG.
FIG. 8 is an end view showing the state of the contact surface between the nut 4 and the end face 15 tightened for restraining the height of the floor bundle. In this example, FIGS.
As can be seen, a female thread portion in which four ridges 18 and four ridges 19 each having a thread groove 17 formed on the inner surface are alternately arranged by taps 14 having four thread rows 16 at 90-degree intervals. 7 is formed.

As shown in FIG. 5, there are a total of four concave streaks 18 formed in the female screw portion 7 when the thread groove 17 is formed. Fifteen
To form A screw groove 17 is formed on the inner surface of the recess 18, and the male screw portion 3 of the receiving plate 1 or the base plate 2 is screwed into the screw groove 17. Since the thread grooves 17 are formed at intervals and the number equal to the number of the thread rows 16 of the taps 14, if the thread row of the taps is three, as shown in FIG. If there are eight rows, the result is as shown in FIG. 10 (equivalent to FIG. 8). This screw groove
17 has an advantage that the screwing of the male screw portion 3 is accurate and stable because the surface is compressed and hardened.

[0012] As shown in FIG.
The thread row 16 of 14 is pressed and recessed to the extent that a thread groove 17 is formed on the inner surface, but the ridge 19 is a residual portion formed as a result of forming the recess 18, and the outer diameter of the support rod body 6 is reduced. Will keep. The female thread portion 7 having such an end surface shape can be formed by rotating the tap 14 by an angle of the interval of the thread row 16/2/2, in this example, 45 °, so that the thread row 16 is not caught by the ridge.
The tap 14 can be easily pulled out from the deformed female screw 7 after pressing.

The thus formed substantially star-shaped end face 15 is hardly compressed in terms of area, though it is accompanied by a shape deformation.
Since the cross section is equal to the cross section of the support rod 6, the outer diameter is wider than the end face of the conventional support rod. In addition, concave streak 18
Can be abutted against the nut 4 so as to cross in the radial direction, so that the nut 4 can be stably supported by the female screw portion 7 according to the present invention. In addition, the female screw portion 7 in which the concave ridges 18 and the convex ridges 19 are alternately arranged has greatly improved rigidity because the convex ridges 19 function as ribs. For this reason, the structural strength of the support rod 6 of the present invention is increased, and the load resistance as a floor bundle is also improved.

From the above description, it is understood that the number of intermittent threads and the shape of the end face of the thread groove 17 formed in the female screw portion 7 depend on the tap 14 used. For example, in FIG. 9, three thread rows are formed from the thread grooves 17 and the substantially triangular end face 15 divided into three rows.
It turns out that the tap of the column was used. From now on, theoretically, the thread groove 17 and the radial end face divided into eight rows as shown in FIG.
Although it is possible to form 15, it is actually difficult to perform intermittent pressing in the circumferential direction, or there is a problem that it is difficult to pull out the tap after forming the thread groove,
It is not realistic to interrupt too many female threads or to form a complicated end face shape. Actually, the example of the screw groove 17 divided into four rows and the substantially star-shaped end face 15 is fundamental.

In this embodiment, a notch 21 large enough to allow the male screw portion 3 to be loosely fitted in the base plate 2 is provided (see FIG. 4).
As shown in FIG. 11, the support rods 6 of a plurality of floor bundles can be arranged in combination. Notch 21 is for support rod 6
Alternatively, the number is not limited as long as the size and position are such that the male screw portions 3 of the plates 1 and 2 can be loosely fitted. Conventionally, when arranging floor bundles, mainly the base plates interfere with each other,
During storage or transportation, each plate and the support rod were often separated. In this example, by providing the notch 21 in the base plate 2, for example, as shown in FIG.
It enables storage and transportation in a much denser state than before. As a result, since the plates 1, 2 and the support rods 6 are shipped after being manufactured after being manufactured, and only the height adjustment needs to be performed without assembling each other at the site, the workability is improved. is there.

[0016]

According to the steel floor bundle of the present invention, labor, labor and cost in production can be reduced. The formation of the internal thread, which had been the most pending issue in the past, can be completed in a short time with an easy procedure of engraving the thread array of taps by pressing, and the formed screw groove is more stable because the surface is hardened It is possible to realize the above-mentioned screwing relationship. Also,
As a result, the shape of the end face becomes complicated like a substantially star shape or a substantially polygonal shape, the support of the nut that restrains the height of the floor bundle is more stable, and the reliability is higher than the conventional steel floor bundle. It makes it possible to provide products.

[Brief description of the drawings]

FIG. 1 is a front view of a steel floor bundle according to the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a plan view of a receiving plate.

FIG. 4 is a plan view of a base plate.

FIG. 5 is an enlarged perspective view showing a female screw portion of the support rod of the present embodiment.

FIG. 6 shows a state where a tap is inserted into an opening and a press is applied.
FIG. 4 is an end view of (first step).

FIG. 7 is an end view of a state in which a tap is rotated and removed after pressing (second step).

FIG. 8 is an end view showing a contact surface state between the tightened nut and the end face.

FIG. 9 is a diagram corresponding to FIG. 8 of a substantially triangular end surface.

FIG. 10 is a diagram corresponding to FIG. 8 of a radial end surface.

FIG. 11 is a perspective view of a state in which the floor bundles of the present example are combined and arranged.

FIG. 12 is a plan view illustrating a state in which storage or transportation is being performed in the state of FIG. 11;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Receiving plate 2 Base plate 3 Male screw part 4 Nut 5 Washer 6 Support rod body 7 Female screw part 8 Large pull 9 Nail hole 10 Nail 11 Rubber or resin packing 12 Rib groove 13 Opening 14 Tap 15 End face 16 Thread row 17 Screw groove 18 Concave strip 19 Convex strip 21 Notch

Continued on the front page (72) Inventor Akiho Matsumoto 500 Akahama, Soja-shi, Okayama Om Equipment Okayama Head Office

Claims (1)

[Claims] 1. A steel product in which forward and reverse male screw portions erected on a receiving plate and a base plate are screwed to respective female screw portions formed on both ends of a support rod body so as to be adjustable in height. In the floor bundle, the female screw portion is provided with a plurality of recesses and ridges extending in the longitudinal direction from the end face of the support bar alternately in the circumferential direction of the support bar, and forming a thread groove on the inner surface of the recess. A steel floor bundle.