JP3813295B2 - Steel floor bundle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a floor bundle that supports large pulls (crossbars that support joists under the floor) and the like in a wooden building.
[0002]
[Prior art]
Conventional steel floor bundles, as seen in Utility Model Registration No. 3031622, generally have a structure in which a substantially L-shaped receiving plate and a base plate are connected to each other by a support rod having a turnbuckle structure. It is. This steel floor bundle is placed on a boulder or the like in a state where the forward and reverse male thread portions standing on the receiving plate and the base plate are respectively screwed into forward and reverse female thread portions formed at both ends of the support bar. The base plate is fixed, and the length from the base plate to the receiving plate by turning the support bar, that is, the height of the steel floor bundle is adjusted. After adjustment, tighten the nut screwed to each male screw part to the support bar to fix the height, and nail from the outside to the receiving plate that is supported by reaching the lower corner of the large pull Etc. to prevent misalignment between the large pull and the steel floor bundle.
[0003]
[Problems to be solved by the invention]
The support rod body in the conventional steel floor bundle has a thick middle part so that it can be easily turned when turning to adjust the height, and a female thread part that engages with a male thread part provided on each plate. The end formed with a shape that is squeezed according to the male screw portion. The load applied to the steel floor bundle is applied to the end face of the support bar through the nut screwed to the male thread part of each plate. However, as described above, the end face of the support bar with the narrowed end part has a small diameter. Therefore, the contact area with the nut is reduced, and the nut must be supported in the vicinity of the inner peripheral edge, which causes a problem that load resistance deteriorates.
[0004]
In addition, the end of the support bar must be formed with a thread groove of a female thread part for screwing the male thread part of each plate. For example, a screw groove is formed by tightening a tap from the end face. It took the most laborious work to do. In addition, since female thread portions are required at both ends of the support rod body, the labor, time, and cost of the work related to the formation of the thread groove occupy a large specific gravity in the production of the steel floor bundle. Therefore, in order to develop a steel floor bundle that enhances load resistance and reduces the manufacturing cost by suppressing the working ratio of female thread formation, it has been studied repeatedly.
[0005]
[Means for Solving the Problems]
As a result of the study, we developed a screw that can be adjusted in height by screwing the forward and backward male threaded parts erected on the receiving plate and base plate into the forward and backward female threaded parts formed on both ends of the support bar. In the steel floor bundle, the female thread portion is provided with a plurality of recesses and ridges extending in the longitudinal direction from the end surface of the support bar body alternately in the circumferential direction of the support bar body, and a screw is provided on the inner surface of the recess bar. Ri Na to form a groove, the groove is formed by recessing to the extent that the screw groove in the inner surface is formed by a press which presses the inner surface the threads column tap inserted into the opening of the support rod end, convex The strip is formed as a residual portion that can be formed as a result of forming the concave strip, so that the tap can be easily pulled out from the deformed female screw portion after pressing by moving the thread row to the space of the convex strip without catching. it is a steel floor flux. Specifically, the female thread portion includes a groove having four thread rows arranged at intervals of 90 degrees, and a groove that has a groove formed on the inner surface, and a protrusion that is a remaining portion formed as a result of forming the groove. A configuration in which four portions are alternately arranged, or a tap having three rows of screw threads at 120 degree intervals, and a remaining portion that can be obtained as a result of the formation of the groove on the inner surface. There is a configuration in which three ridges are alternately arranged and formed.
[0006]
The steel floor bundle of the present invention has a larger end surface outer diameter than the conventional one by arranging a plurality of concave or convex strips extending in the longitudinal direction from the end surface of the support bar in the circumferential direction of the support bar. In addition, this end face can be made into a substantially polygonal shape or a star-like end face to increase the rigidity of the end face, thereby suppressing a decrease in load resistance as a support rod or increasing load resistance. In this female screw part, since the screw groove is formed on the inner surface of the concave strip, the diameter of the male screw part can be made the same as that of a conventional steel floor bundle.
[0007]
The protrusions, recesses, and screw grooves that constitute the female screw part are inserted into the end of the support rod body, and the position and number of the press are determined in accordance with the position and number of thread rows of the tap, It can form at once by performing a press so that a groove may be arranged in the part corresponding to the thread row. Generally, since the thread rows are arranged intermittently in the circumferential direction of the tap, by rotating the tap as much as necessary after forming the thread groove, the thread row is aligned with the ridges, and the tap can be easily It can be taken out.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described 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 shown in FIGS. 1 and 2, the floor bundle of this example has a male screw portion 3 of a right-hand thread on the receiving plate 1 and a male screw portion 3 of a left-hand screw on the base plate 2, and each male screw portion. In the state where the nut 4 and the washer 5 are attached to 3, the male screw portion 3 is screwed into the female screw portions 7 corresponding to both ends of the support rod body 6 processed with a round pipe to constitute a turnbuckle structure.
[0009]
The receiving plate 1 having a substantially L-shape when viewed from the side faces each surface to the bottom and side surfaces of the large pull 8 (see the two-dot chain line in FIG. 1), and drives the nail 10 through the nail hole 9 to fix the large pull 8. A rubber or resin packing 11 is fitted in the nail hole 9 to buffer the receiving plate 1 and the large pull 8 and hold the nail 10 with the packing 11 to facilitate driving. Further, in the receiving plate 1 of this example, both side edges are folded downward and formed in the rib groove 12 to enhance the rigidity. The flat base plate 2 is placed on a boulder or the like (not shown), and a nail or an anchor is driven into the nail hole 9 or an adhesive or the like is poured to fix it. A rib groove 12 is also formed on this base plate to enhance rigidity. The height of the floor bundle is adjusted by turning the support bar 6 clockwise or counterclockwise to expand and contract the distance between the receiving plate 1 and the base plate 2 and tightening the nuts 4 and 4 after the adjustment is completed. Is restrained.
[0010]
FIG. 5 is an enlarged perspective view showing the female thread portion 7 of the support bar 6 of this example, and FIG. 6 shows a state in which the tap 14 is inserted into the opening 13 at the end of the support bar 6 and pressed (first step). 7 is an end view of the state in which the tap 14 is rotated approximately 45 degrees after being pressed and pulled out from the opening 13 (second step). FIG. 8 is a nut tightened to restrain the height of the floor bundle. 4 is an end view showing a state of contact between 4 and an end face 15. FIG. In this example, as shown in FIG. 5 to FIG. 8, the four strips 18 and the strips 19 with the thread grooves 17 formed on the inner surface by the taps 14 having four rows of thread threads 16 at 90 degree intervals are provided. The female screw portions 7 are alternately arranged one by one.
[0011]
As shown in FIG. 5, there are a total of four recesses 18 created in the female thread portion 7 when the screw groove 17 is formed, and the substantially star-shaped end face 15 is formed together with the protrusions 19 that remain without being pressed. To do. 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 screw grooves 17 are formed with an interval and the number equal to the number of the thread rows 16 of the tap 14, if the thread row of the tap is three rows, the thread row is as shown in FIG. 9 (corresponding to FIG. 8). If there are 8 rows, it will be as shown in FIG. Since the surface of the screw groove 17 is compressed and hardened, there is an advantage that the screwing of the male screw portion 3 is accurate and stable.
[0012]
As shown in FIG. 7, the recess 18 is recessed to such an extent that the thread row 16 of the tap 14 is pressed to form the thread groove 17 on the inner surface, but the protrusion 19 is a result of forming the recess 18. This is a remaining portion that can be maintained and maintains the outer diameter of the support bar 6. The female threaded portion 7 having such an end face shape is provided with a protrusion 19 that does not catch the thread row 16 when the tap 14 is rotated by an angle of an interval / 2 of the thread row 16, or 45 degrees in this example. The tap 14 can be easily pulled out from the deformed female screw portion 7 after pressing.
[0013]
Although the substantially star-shaped end surface 15 formed in this way is deformed in shape, it is hardly compressed in terms of area and is equal to the cross-section of the support bar 6, so that the outer diameter is larger than that of the end surface of the conventional support bar. It is wide. In addition, since the recess 18 can be brought into contact with the nut 4 so as to cross in the radial direction, the female screw portion 7 according to the present invention can support the nut 4 stably. In addition, the female screw portion 7 in which the concave stripes 18 and the convex stripes 19 are alternately arranged has greatly improved rigidity because the convex stripes 19 function as ribs. For this reason, the structural strength of the support bar 6 of the present invention is increased, and the load resistance as a floor bundle is also improved.
[0014]
From the above description, it can be seen that the intermittent number and the end face shape of the thread groove 17 formed in the female screw portion 7 depend on the tap 14 to be used. For example, in FIG. 9, it can be seen from the thread grooves 17 divided into three rows and the substantially triangular end face 15 that three screw rows are used. From this, it is theoretically possible to form the thread grooves 17 and the radial end faces 15 divided into eight rows as shown in FIG. 10, but in practice it is difficult to intermittently press in the circumferential direction. In addition, there is a problem that it is difficult to pull out the tap after forming the thread groove. Therefore, it is not realistic to interrupt the female screw too much or to form a complicated end face shape. In practice, the example of the thread groove 17 and the substantially star-shaped end face 15 divided into the above-mentioned four rows is fundamental.
[0015]
In this example, the base plate 2 is further provided with a notch 21 of a size that allows the male screw portion 3 to be loosely fitted (see FIG. 4), and a plurality of floor bar support bars 6 can be combined and arranged as shown in FIG. I am doing so. The number of the cutouts 21 is not limited as long as the cutout 21 is in a size and a position where the support bar 6 or the male screw portion 3 of each of the plates 1 and 2 can be freely fitted. Conventionally, when the floor bundles are arranged, the base plates mainly interfere with each other. Therefore, when storing or transporting, the plates and the support rods are often separated. In this example, by providing the notch 21 in the base plate 2, for example, as shown in FIG. 12, it is possible to store and transport in a much denser state as compared with the conventional case. As a result, after manufacturing, the plates 1 and 2 and the support rod 6 are shipped in a connected state, and it is only necessary to adjust the height without performing assembly on the site. is there.
[0016]
【The invention's effect】
The steel floor bundle of the present invention can reduce labor, labor and cost in production. The formation of the female thread, which was the most important issue in the past, can be completed in a short time by an easy procedure of engraving the thread array of taps by pressing, and the surface of the formed thread groove is also more stable The screwed relationship can be realized. In addition, as a result, the shape of the end surface becomes complicated like a substantially star shape or a substantially polygonal shape, and the support of the nut that restrains the height of the floor bundle is more stable, which is more reliable than conventional steel floor bundles. This makes it possible to provide high-quality 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 thread portion of a support rod body of this example.
FIG. 6 is an end view of a state (first step) in which a tap is inserted into the opening and pressed.
FIG. 7 is an end view of a state (second step) in which a tap is rotated and extracted after pressing.
FIG. 8 is an end view showing a contact surface state between a tightened nut and an end surface.
FIG. 9 is a view corresponding to FIG. 8 showing a substantially triangular end surface;
FIG. 10 is a view corresponding to FIG. 8 showing a radial end face.
FIG. 11 is a perspective view of a state in which the floor bundles of this example are arranged in combination.
12 is a plan view showing a state in which the state shown in FIG. 11 is used for storage or transportation. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Receiving plate 2 Base plate 3 Male thread part 4 Nut 5 Washer 6 Support rod body 7 Female thread part 8 Large pull 9 Nail hole
10 nails
11 Rubber or resin packing
12 Rib groove
13 opening
14 taps
15 End face
16 thread row
17 Thread groove
18 concave
19 ridges
21 Notch

Claims (3)

In a steel floor bundle in which forward and reverse male thread portions erected on a receiving plate and a base plate are respectively screwed into forward and reverse female thread portions formed at both ends of a support rod body and connected so as to be adjustable in height. threaded portion disposed alternately and a plurality of concave and convex strips extending in the longitudinal direction from the end surface of the support rod in the circumferential direction of the support rod, Ri Na to form a screw groove in the recessed strip inner surface, The concave groove is formed so as to form a screw groove on the inner surface by pressing the inner surface against a thread array of taps inserted into the opening at the end of the support rod, and the ridge formed the concave line. by forming the remainder which can result, tap you, characterized in that transferred into the space ridge without snagging the threaded columns, and so easily pulled out from the female thread portion which is deformed after pressing steel Flooring bundle.   The female thread portion has four ridges each having a groove formed on the inner surface by a tap having four rows of thread rows at 90 ° intervals and a ridge that is a remaining portion formed as a result of forming the groove. The steel floor bundle according to claim 1, wherein the steel floor bundle is formed alternately.   The female thread portion has three ridges each having a groove formed on the inner surface by a tap having three rows of thread rows at intervals of 120 degrees, and a ridge that is a remaining portion formed as a result of forming the groove. The steel floor bundle according to claim 1, wherein the steel floor bundle is formed alternately.

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