JP2020153211A - Building height adjustment floor support metal fitting - Google Patents

Abstract

To provide a height adjustment floor support metal fitting capable of supporting a floor construction of a building on a foundation stably and restricting a looseness of a high nut for a height adjustment in a long term use without restricting a height adjustment range in a low floor building.SOLUTION: In the height adjustment floor support metal fitting having a base part arranged on a foundation, a floor member receiving part for supporting the floor member, a bolt 3 with its lower end mounted to the base part, a high nut 4 threaded into an upper end of the bolt 3 and mounted to the floor member receiving part and a lock nut 13 threaded into the bolt 3 and engaged with a lower end of the high nut 4 to prevent the high nut 4 from getting loose, the lower end 14 of the high nut 4 has a tapered protruding part, a tapered accommodating part with the same tapered angle as the tapered protruding part is formed inside of a side engaging with the high nut 4 of the lock nut 13 and by tightening of the lock nut 13, the tapered protruding part of the high nut 4 is fitted closely in the tapered fitting part of the lock nut 13.SELECTED DRAWING: Figure 3

Description

The present invention relates to a building height adjusting floor support fitting, and more particularly to a height adjusting floor support fitting that prevents pre-rotation and slackening of a height adjusting nut.

Usually, in a wooden building, the floor is supported by a vertical member called a floor bundle on the surface of a concrete foundation or a bundle of stones placed on the surface of the foundation. That is, in the floor structure of the first floor of a wooden building, the joists that are the base of the floor and the large pulls that support them are supported by the vertically erected floor bundles. In recent years, floor bundles made of metals such as stainless steel and steel have been known (see, for example, Patent Document 1).

However, in the case of a low-floor building, the space under the floor is narrow, and it is difficult to use a floor bundle as described in Patent Document 1. In particular, the number of metal floor bundles that can accommodate buildings with a very low floor space of 100 mm or less has been extremely limited.

The present inventor first includes a base portion and a floor member receiving portion arranged in contact with the foundation, and screwes a bolt attached to the base portion and a nut attached to the floor member receiving portion. A height-adjusting floor support metal fitting that expands and contracts the distance between the base portion and the floor member receiving portion due to the rotation of the nut, and the nut so that the floor member receiving portion does not follow and rotate due to the rotation of the nut. A height-adjustable floor support metal fitting is proposed in which the other end portion is rotatably attached to the floor member receiving portion (see Patent Document 2).

In Patent Document 2, a second nut (hereinafter referred to as a lock nut) is provided in order to prevent the height adjusting nut (hereinafter referred to as a high nut) of the height adjusting floor support metal fitting from spontaneously rotating and loosening. It is described that it is screwed into a bolt. However, such high nuts and lock nuts also loosen after long-term use. Various measures have been attempted to suppress such slack as much as possible.

As a device for suppressing slack, it is common to insert a cushion called a washer between the high nut and the lock nut and tighten with the lock nut. The washers include flat washers, spring washers, toothed washers, plate washers, corrugated spring washers, etc., but flat washers and spring washers are used for building height adjustment floor support metal fittings.

However, the spring washer is formed by cutting a coiled spring plate material, and since the cut part has a raised shape, it can be expected to have a slack-preventing effect on the high nut, but the height adjustment range of the floor support bracket. There is a problem that it greatly restricts.

In addition, since the flat washer is an annular flat steel body, it is considerably thinner than the spring washer, but it does not have the repulsive force against the tightening torque like the spring washer, so the effect of suppressing slack cannot be expected so much. ..

Japanese Patent No. 4385095 Japanese Unexamined Patent Publication No. 2016-199982

The present invention has been made under the above circumstances, and in a low-floor building in which the space under the floor is narrow, it is possible to stably support the floor structure of the building on the foundation and restrict the height adjustment range. It is an object of the present invention to provide a height adjusting floor support metal fitting that suppresses slackening of a height adjusting high nut during long-term use.

In order to solve the above problems, one aspect of the present invention includes a base portion arranged in contact with the foundation, a floor member receiving portion that supports the floor member, and a bolt whose lower end portion is attached to the base portion. The high nut is screwed into the upper end of the bolt, and the upper end is screwed to the bolt and engaged with the lower end of the high nut to loosen the high nut. In a height-adjusting floor support metal fitting provided with a lock nut for preventing the above, and the distance between the base portion and the floor member receiving portion expands and contracts due to the rotation of the high nut, the lower end portion of the high nut has a tapered protruding portion. A tapered accommodating portion having the same taper angle as the tapered protruding portion is formed on the inside of the lock nut on the side that engages with the high nut, and the lock nut is tightened to tighten the lock nut. Provided is a height adjusting floor support metal fitting characterized in that the tapered protruding portion of the high nut is tightly fitted in the tapered fitting portion.

In another aspect of the present invention, a base portion arranged in contact with the foundation, a floor member receiving portion for supporting the floor member, a first bolt whose lower end is attached to the base portion, and an upper end portion thereof are provided. A second bolt attached to the floor member receiving portion, a high nut screwed to the upper end portion of the first bolt and screwed to the lower end portion of the second bolt, and the first bolt. A first lock nut that is screwed into a bolt and engages with the lower end of the high nut to prevent the high nut from loosening, and a first lock nut that is screwed into the second bolt and of the high nut. A height-adjustable floor support that engages with the upper end and is provided with a second lock nut for preventing the high nut from loosening, and the distance between the base and the floor member receiving portion expands and contracts due to the rotation of the high nut. In the metal fitting, the lower end and the upper end of the high nut have tapered protrusions, and the inside of the first lock nut and the second lock nut on the side engaging with the high nut is tapered. A tapered housing portion having the same taper angle as the protruding portion is formed, and by tightening the first lock nut and the second lock nut, the inside of the tapered fitting portion of the first lock nut and the second lock nut is formed. Provided is a height adjusting floor support metal fitting, characterized in that the lower end portion and the tapered protruding portion of the upper end portion of the high nut are tightly fitted.

According to the present invention, in a low-floor building in which the space under the floor is narrow, it is possible to stably support the floor structure of the building on the foundation, and with a simple structure, the height adjustment range is not restricted. Provided are height-adjustable floor support fittings that prevent natural rotation and slack of height-adjusting high nuts during long-term use.

The figure which shows the outline of the height adjustment floor support metal fitting which concerns on 1st Embodiment of this invention. The figure which shows the mounting structure of the high nut of the adjustment metal fitting and the floor member receiving part shown in FIG. The figure which shows the screwing state of the high nut and the lock nut of the adjustment metal fitting shown in FIG. 1 to the bolt. The figure which shows the outline of the height adjustment floor support metal fitting which concerns on 2nd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail.
FIG. 1 is a diagram showing an outline of a height adjusting floor support fitting according to an embodiment of the present invention. In FIG. 1, the height adjusting floor support metal fitting 1 includes a base portion 2 in contact with the foundation 20, a bolt 3 whose lower end is attached to the base portion 2 and vertically rises from the base portion 2, and a bolt 3 of the base portion 2. It is composed of a height adjusting high nut 4 screwed from above and a floor member receiving portion 5 which supports the joist 6 and has the upper end of the high nut 4 rotatably attached. The floor member receiving portion 5 has, for example, an L-shape, and supports the lower surface and the side surface of the joist 6. The high nut 4 has a hexagonal columnar outer shape and has a sufficient length for adjusting the height.

Further, on the bolt 3, the high nut 4 is loosened, the length of the height adjusting floor support metal fitting is extended to the maximum to support the joist 6, and then the high nut 4 is naturally tightened by vibration or the like to support the height adjusting floor. The lock nut 13 is screwed in order to prevent the length of the metal fitting from being reduced and to prevent the high nut 4 from spontaneously rotating or loosening due to long-term use. The lock nut 13 also has a hexagonal columnar outer shape and is shorter in length than the high nut 4.

The portion of the base portion 2 to which the bolt 3 is attached is curved upward, and the bottom surface thereof is convex. The bolt 3 of the base portion 2 is attached by inserting the bolt 3 into the hole 8 formed in the center of the convex portion 7 from below and welding the head of the bolt 3 in the convex portion 7. .. It is necessary to attach the bolt 3 so that its head does not protrude below the lower surface of the base portion 2 and interfere with the plane contact with the foundation 20.
FIG. 2 shows a mounting structure of the upper end of the high nut 4 to the floor member receiving portion 5. In FIG. 2, the central portion of the floor member receiving portion 5 is curved downward, the bottom surface thereof is concave, and the hole 10 is formed in the center of the concave portion 9.

The high nut 4 is composed of a hexagonal column nut body 11 and a mounting portion 12 at the upper end thereof. The high nut body 11 is threaded inward, and a bolt 3 is screwed from the lower end thereof. By rotating the high nut 4, the bolt 3 is tightened or loosened, and the length of the height adjusting floor support metal fitting is expanded or contracted. Thereby, the joist 6 can be supported at a predetermined height.
The mounting portion 12 has a cylindrical shape, and the inner diameter is the same as the inner diameter of the nut body 11 before the thread is cut. Initially, the outer diameter is smaller than the hole 9, but the outer diameter of the tip is the hole 9 at the time of mounting. It is processed larger.

To attach the upper end of the high nut 4 to the floor member receiving portion 5, first, the attachment portion 12 whose tip is not machined (the outer diameter is smaller than the hole 9) is placed in the hole 10 of the concave portion 9 of the floor member receiving portion 5. Insert in. Next, the tip of the mounting portion 12 is processed by crimping, pressing, caulking, or the like so that the outer diameter is larger than the hole 10. At that time, it is necessary to make the length of the portion where the outer diameter of the mounting portion 12 is smaller than the hole 9 larger than the thickness of the floor member receiving portion 5 and prevent the tip from protruding upward from the concave portion 9.

By attaching the high nut 4 to the floor member receiving portion 5 in this way, even if the high nut 4 rotates, the floor member receiving portion 5 does not follow it and maintains a stationary state while supporting the joists 6. Can be done. That is, the high nut 4 is attached to the floor member receiving portion 5 so as to be relatively rotatable. Further, the tip of the high nut 4 does not protrude and the support of the joist 6 is not hindered.

Next, the joint portion between the high nut 4 and the nut 13 will be described with reference to FIG.
As shown in FIG. 3, the lower end portion 14 of the high nut 4 has a tapered surface 15 formed by reducing the outer diameter downward, while the upper end portion 23 of the lock nut 13 is threaded. The inner diameter is expanded upward to form a tapered surface 24. The taper angle of the tapered surface 15 of the high nut 4 and the taper angle of the tapered surface 24 of the lock nut 13 are the same. Therefore, by tightening the lock nut 13, the lower end 14 of the nut 4 and the upper end of the lock nut 13 are tightened. It fits tightly with 23 without any gap. The taper angle is not particularly limited, but is preferably 75 ° to 85 ° with respect to the end face of the nut (direction perpendicular to the axis). If it is less than 75 ° or more than 85 °, it is difficult to obtain the effect of forming the tapered surface.

The height adjusting floor support metal fitting 1 configured as described above is used as a device for supporting a floor member such as a joist 6 at a predetermined height as follows.
First, the height adjusting floor support fitting 1 is arranged so that the base portion 2 is placed at a predetermined position on the foundation 20. Then, by rotating the high nut 4 in a predetermined direction and loosening the bolt 3, the length of the height adjusting floor support metal fitting 1 is extended, and the floor member receiving portion 5 covers the lower surface and the side surface of the joist 6 of the floor member. Make sure to support it without any gaps. Then, by tightening the lock nut 13, the lower end portion 14 of the high nut 4 is fitted into the enlarged diameter recess of the upper end portion 23 of the lock nut 13, and the high nut 4 is strongly pressed against the lower surface of the floor member receiving portion 5. Fix it so that it does.

In this case, since the lower end 14 of the high nut 4 and the upper end 23 of the lock nut 13 come into contact with each other on the tapered surface, the contact area thereof is larger than the contact area of the horizontal contact surface of the conventional double nut. Therefore, the natural rotation and slack of the high nut 4 can be reliably prevented.
In this way, according to the height adjusting floor support metal fitting 1 according to the present embodiment, there is no gap between the foundation 20 and the joists 6 on the foundation 20 under the floor at a narrow interval of 100 mm or less, for example. Moreover, it is possible to stably hold the floor member at a predetermined height without causing slackening of the high nut even after long-term use.

In the height adjusting floor support metal fitting according to the present embodiment, by forming the height adjusting floor support metal fitting using a high nut having a length of 40 mm, the height is under the floor in a narrow space where the distance between the foundation and the floor member is 80 mm. Adjustable floor support fittings can be installed to support floor members. Further, if the height adjusting floor support metal fitting is constructed by using a short high nut of 15 mm, the height adjusting floor support metal fitting is installed under the floor in an extremely narrow space where the distance between the foundation and the floor member is 30 mm to support the floor member. can do.

Hereinafter, the second embodiment of the present invention will be described in detail.
FIG. 4 is a diagram showing the structure of the height adjusting floor support fitting according to the second embodiment of the present invention. In FIG. 4, the height adjusting floor support metal fitting 30 has a first bolt 31 whose lower end is attached to the base portion 2 and rises vertically from the base portion 2 and whose upper end is attached to the floor member receiving portion 5 to form a floor. A second bolt 32 that descends vertically from the member receiving portion 5 is screwed from below and above the high nut 33, respectively. That is, not only one bolt 3 (first bolt 31) whose lower end is attached to the base portion 2 as in the first embodiment, but also a second bolt 32 attached to the floor member receiving portion 5. They are provided and they are screwed onto one high nut 33 facing each other from below and above the high nut 33, respectively.
Further, the first bolt 31 has a first lock nut 34 screwed under the high nut 33, and the second bolt 32 has a second lock nut 35 screwed on the high nut 33. ..

Similar to the first embodiment, the lower end portion 36 of the high nut 33 has a tapered surface 37 formed by reducing the outer diameter downward, while the upper end portion 38 of the first lock nut 34 has a tapered surface 37. The inside where the thread is cut is enlarged in diameter upward to form a tapered surface 39. The taper angle of the tapered surface 37 of the high nut 33 and the taper angle of the tapered surface 39 of the first lock nut 34 are the same. Therefore, by tightening the first lock nut 34, the lower end portion 37 of the high nut 33 And the upper end 38 of the first lock nut 34 are fitted tightly with each other without a gap.

On the other hand, the upper end portion 40 of the high nut 33 has a tapered surface 41 formed by reducing the diameter of the outer end portion upward, and the lower end portion 42 of the second lock nut 35 is threaded on the inner side. The tapered surface 43 is formed by expanding the diameter upward. By tightening the second lock nut 35, the upper end portion 40 of the high nut 33 and the lower end portion 42 of the second lock nut 35 are fitted tightly without any gap.

In the second embodiment described above, the lower end 36 of the high nut 33 and the upper end 38 of the first lock nut 34 are in contact with each other on the tapered surface, and the upper end 40 of the high nut 33 and the second lock are in contact with each other. The lower end portion 42 of the nut 35 is in contact with the tapered surface. Their contact area is larger than the contact area of the horizontal contact surface of a conventional double nut. Therefore, by tightening the first lock nut 34 and the second lock nut 35, the lower end portion 36 of the high nut 33 is fitted into the enlarged diameter recess of the upper end portion 38 of the first lock nut 34, and the height is increased. The upper end 40 of the nut 33 is fitted in the enlarged recess of the lower end 42 of the second lock nut 35, and their tapered surfaces are in close contact to ensure that the high nut 4 is prevented from spontaneous rotation and slack. Can be done.

1,30 ... Height adjustment floor support metal fittings 2 ... Base 3 ... Bolts 4, 33 ... High nuts 5 ... Floor member receiving parts 6 ... Roots 7 ... Convex parts 8, 10 ... Holes 9 ... Concave parts 11 ... Nuts Main body 12 ... Mounting portion 13 ... Lock nut 14, 36 ... Lower end portion of high nut 15, 37, 41 ... Tapered surface of high nut 31 ... First bolt 32 ... Second bolt 34 ... First lock nut 35 ... Second lock nut

Claims (2)

A base portion arranged in contact with the foundation, a floor member receiving portion that supports the floor member, a bolt whose lower end is attached to the base portion, and an upper end portion of the bolt are screwed together, and the upper end portion is said to be the same. A high nut attached to a floor member receiving portion and a lock nut that is screwed into the bolt and engages with the lower end of the high nut to prevent the high nut from loosening are provided. In the height adjusting floor support metal fitting in which the distance between the base portion and the floor member receiving portion expands and contracts due to the rotation of the high nut, the lower end portion of the high nut has a tapered protruding portion and is engaged with the high nut of the lock nut. A tapered accommodating portion having the same taper angle as the tapered protruding portion is formed on the inside of the mating side, and by tightening the lock nut, the tapered protruding portion of the high nut is contained in the tapered fitting portion of the lock nut. Height-adjustable floor support brackets that are tightly fitted together. A base portion arranged in contact with the foundation, a floor member receiving portion that supports the floor member, a first bolt whose lower end is attached to the base portion, and an upper end portion which is attached to the floor member receiving portion. The second bolt, the high nut screwed to the upper end of the first bolt and screwed to the lower end of the second bolt, and the high nut screwed to the first bolt and described above. Engages with the lower end of the high nut and is screwed into the second bolt and engages with the upper end of the high nut with the first lock nut for preventing the high nut from loosening. In a height adjusting floor support metal fitting provided with a second lock nut for preventing the high nut from loosening, the distance between the base portion and the floor member receiving portion expands and contracts due to the rotation of the high nut, the lower end of the high nut. The portion and the upper end portion have a tapered protruding portion, and the inside of the first lock nut and the second lock nut on the side engaging with the high nut is tapered with the same taper angle as the tapered protruding portion. A shape accommodating portion is formed, and by tightening the first lock nut and the second lock nut, the lower end portion of the high nut and the lower end portion of the high nut are formed in the tapered fitting portion of the first lock nut and the second lock nut. A height-adjustable floor support bracket characterized in that the tapered protrusions at the upper end are tightly fitted.

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