JP3382194B2 - Construction inserts - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insert for embedding in a concrete slab and suspending a ceiling, equipment, and the like. The present invention relates to an insert for use in laying. 2. Description of the Related Art Conventionally, as this type of insert, an insertion hole is previously provided in a heat insulating material so that a bolt to be attached to a female screw of an insert body can be inserted, and the insert is inserted along the insertion hole. , Nails are attached to concrete panels.
Alternatively, processing such as extraction was performed. In Japanese Patent Application Laid-Open No. Sho 60-13149, a plurality of movable pieces are provided.
Driving without drilling the insertion hole, opening outward by the downward movement of the insert body, pushing the surrounding heat insulating material outward, and preventing heat insulating material fragments from entering the internal thread of the insert body, Alternatively, the actual Kaihei 01-1
Japanese Patent No. 1209 also discloses an insert body in which the diameter of the insertion tube portion is expanded by driving the insert body and can be cut into an insertion hole provided in the heat insulating material in advance and does not require nailing. [0003] In the above-mentioned conventional method, fixing the insert with a nail and providing a through-hole in the heat insulating material in advance, these two points are the work of mounting the insert or after mounting. In the processing of nails, there is a problem that the size of the nails is troublesome. Also, JP-A-60-131
In the case of No. 49, although the trouble of drilling the insertion hole was eliminated by a plurality of movable pieces having a sharp tip, it was necessary to fix it with nails. Although these nails are not required, the above problems could not be solved at once, since the insertion tube portion had an increased diameter and required an insertion hole for biting and fixing. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to eliminate the trouble of opening an insertion hole in a heat insulating material when attaching an insert to the heat insulating material. Moreover, an object of the present invention is to provide an insert which can be securely fixed to a heat insulating material without using a nail as a fixing means, and which does not require the treatment of a nail after placing concrete. [0005] As means therefor, an anchor piece is formed at the upper end of the body portion, and a screw hole is provided along the axis from the lower end, a hollow support cylinder portion for attaching the body portion to the upper end, A mounting cylinder slidably mounted along the support cylinder, a pair of movable pieces provided below the mounting cylinder, and the movable piece;
At the approximate center of each outer periphery, outward along the vertical direction
And the bottom is the same as the lower end of the movable piece.
It consists of an auxiliary piece that becomes planar, and the pair of movable pieces usually closes in a state where the abutment pieces at the respective lower ends are parallel, and
When the support cylinder is moved downward, the support cylinder is pushed outward to open the legs. [0006] Because of the above structure, a pair of movable pieces are provided below the mounting cylinder, and the abutting pieces at the respective lower ends are normally closed in parallel, so that the heat insulating material can be easily formed without opening the insertion hole. Can be plugged in. Also, because the movable piece is pushed outward and spreads out by the downward movement of the support cylinder,
It can bite into the heat insulating material and can be securely fixed. When the contact piece abuts on the concrete panel, the movable piece can be opened and fixed, without buckling due to beating, with the support cylinder part hanging vertically, etc.
This is to solve the conventional problem. An embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a front view showing an embodiment of the present invention, FIG. 3 is a side view showing an embodiment of the present invention, and FIG. It is a longitudinal cross-sectional view. Reference numeral 10 denotes an insert body made of steel or
An anchor piece 12 made of synthetic resin or the like and having a diameter larger than the body diameter is formed at the upper end of the body portion 11, and a screw hole 13 formed at an appropriate depth along the axis is formed at the lower end. Reference numeral 20 denotes a support cylinder, which is formed of a synthetic resin or the like into a cylindrical shape, and into which the body 11 of the insert body 10 is press-fitted from the upper end thereof and fixed. Reference numeral 30 denotes a mounting cylinder, which is formed with a thin plate-like reinforcing rib 31 projecting outward at an appropriate position on the outer periphery, and temporarily press-fits the supporting cylinder 20 into an inner hollow portion. Mounting tube 3
0 is slidable up and down along the outer circumference of the support cylinder 20, but normally, after the support cylinder 20 is pressed into the mounting cylinder 30 by a certain depth, the support cylinder 20 comes into contact with the inner walls of the movable pieces 40 and 50. And restrict further movement downwards. Reference numerals 40 and 50 denote a pair of movable pieces, which are integrally formed of a synthetic resin on the lower side of the mounting cylinder 30 so as to face downward with a certain interval. The interval is preferably about 1 mm to 5 mm, but is not particularly limited. The movable piece 40 has an outer circumference formed in an arc shape in the lateral direction, is inclined so as to become narrower downward, and continuously protrudes vertically along the outer circumference. .. are formed.
Further, at the lower end, a thin plate-shaped contact piece 42 that contacts the concrete panel is formed so as to be inclined so as to intersect the contact piece 52 of the other movable piece 50 at an acute angle. Reference numeral 43 denotes a thin plate-shaped auxiliary piece which projects outward substantially along the center, up and down direction of the movable piece 40, and whose bottom surface is flush with the bottom surface of the contact piece 42. Are provided so as to be substantially orthogonal. Reference numeral 44 denotes a recess formed by forming the inner wall of the movable piece 40 with a uniform thickness along the outer peripheral arc shape and narrowing downward. At the same time, by forming a hollow portion and communicating with the inside of the mounting tube 30 and the hollow portion, the support tube 20 can be moved downward. The other movable piece 50 also has the same symmetrical shape as the movable piece 40, and is closed so that the contact pieces 42 and 52 are in a parallel state.
The degree of the blockage is determined by connecting the contact pieces 42 and 52 to such an extent that the movable pieces 40 and 50 break when the movable pieces 40 and 50 are opened outward, or in a state where some gaps are separated to some extent, for example,
It may be about 0.1 mm to 5 mm. That is,
When the heat insulating material is inserted, the pieces of the heat insulating material are displaced by the movable pieces 40 and 50.
It suffices that it does not enter from the middle and that it does not hinder the opening of the movable pieces 40 and 50 when fixed. Next, a method of using the embodiment of the present invention will be described. FIG. 5 to FIG. 7 are explanatory views showing the use state of the embodiment of the present invention. As shown in FIG. 5, the construction insert of the present invention is placed on a heat insulating material having a thickness of about 20 to 100 mm laid on the concrete panel A, and the anchor piece 12 of the insert main body 10 is attached by a tool such as a hammer. Hit it. The heat insulating material B is cut and inserted by the contact pieces 41 and 51 of the movable pieces 40 and 50 and the auxiliary pieces 43 and 53, and comes into contact with the upper surface of the concrete panel A. Further, by hitting, the support cylinder 20 slides on the inner wall of the mounting cylinder 30, passes through the hollow portion formed by the concave portions 44 and 54 of both the movable pieces 40 and 50, and the lower end contacts the concrete panel A. Move down to As the support cylinder 20 moves downward, the movable pieces 40 and 50 are pushed outward, the surrounding heat insulating material B is also pushed open, and the legs are opened and fixed with the auxiliary pieces 43 and 54 biting. After placing the slab concrete C and dismantling the concrete panel A, the suspension bolt D can be inserted through the hollow portion of the support cylinder 20 and screwed into the screw hole 13 of the insert body 10. As described above in detail, according to the construction insert of the present invention, a pair of movable pieces are provided on the lower side of the mounting cylinder, and usually, the contact pieces at the lower ends are parallel. Since it is closed in the state, it can be easily inserted into the heat insulating material without opening the insertion hole. Further, the movable piece is pushed outward and spreads out by the downward movement of the support cylinder, so that the movable piece can bite into the heat insulating material and can be securely fixed. Furthermore, since a pair of movable pieces are provided with auxiliary pieces projecting from the outer periphery, each of which has the same planar bottom face as the contact piece at the lower end, so that the contact piece is inserted into the heat insulating material, and the contact piece contacts the concrete panel. At this time, the movable piece can be opened and fixed in a state in which the support tubular portion is vertically installed without being buckled by hitting. That is, in the work of mounting the insert, the work of opening the insertion hole can be labor-saving, and the insert can be securely fixed to the heat insulating material, so that the workability of the mounting work is improved. Since nails are not used for fixing means, after dismantling the concrete panel, for example, it is possible to save the labor of removing nails for rust prevention, applying paint, etc. A more effective construction insert can be obtained.

[Brief description of the drawings] FIG. 1 is a perspective view showing an embodiment of the present invention. FIG. 2 is a front view showing an embodiment of the present invention. FIG. 3 is a side view showing an embodiment of the present invention. FIG. 4 is a central longitudinal sectional view showing an embodiment of the present invention. FIG. 5 is an explanatory diagram showing a use state of the embodiment of the present invention. FIG. 6 is an explanatory diagram showing a use state of the embodiment of the present invention. FIG. 7 is an explanatory diagram showing a use state of the embodiment of the present invention. [Explanation of symbols] 10 Insert body 20 Support tube 30 mounting tube 40, 50 Movable piece 41 Prevention piece 42, 52 contact piece 43, 53 auxiliary pieces 44, 54 recess A concrete panel B Insulation C slab concrete D Hanging bolt

Claims (1)

(57) [Claim 1] An insert body having an anchor piece formed at an upper end of a body portion and a screw hole provided along an axis from the lower end;
A hollow support tube portion for attaching the body portion to the upper end, a mounting tube mounting slidably along the support tube portion, the bottom of said mounting cylinder
Pair of movable pieces provided on the side, and the outer periphery of each of the movable pieces
At the center, projecting outward along the vertical direction
And an auxiliary piece whose bottom surface is flush with the lower end of the movable piece.
The pair of movable pieces are characterized in that the abutment pieces at the respective lower ends are normally closed in a parallel state, and are spread outward and opened by the downward movement of the support cylinder. And construction inserts.