JP2008214897A - Ceiling joist retainer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ceiling joist retainer which can prevent the drop out of a ceiling joist, a ceiling joist mounting implement and the ceiling joist retainer by making the ceiling joist retainer and other respective components hardly slide with respect to one another, and regulating the crosswise motion of each of the components on a horizontal plane. <P>SOLUTION: This ceiling joist retainer 25 is characterized in that a surface 27 of a ceiling joist retainer body 26 is equipped with a surface layer 28 which is formed from a material with a higher coefficient of friction than that of friction of the surface 27 of the ceiling joist retainer body 26. The ceiling joist retainer 25 comprises, for example, the metal ceiling joist retainer body 26, and the surface layer 28 which is formed on the surface 27 of the metal ceiling joist retainer body from zinc rich, Kevlar, carbon, ceramics, a urethane rubber, etc. as high-coefficient-of-friction materials. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a field edge, a field edge fixture, and a field edge receiver that contributes to preventing the field edge from falling off during an earthquake.

Ceiling concrete slabs, suspension bolts, hangers, field guards, field edge fixtures, and ceiling foundations with field edges are known (see, for example, Patent Document 1).
An example of the structure of the ceiling foundation will be described with reference to FIG. The ceiling foundation 1 has a suspension bolt 2 attached to an insert nut or deck plate embedded in a ceiling concrete slab (not shown), a hanger 3 attached to the suspension bolt 2, a field receiver 4 attached to the hanger 3, and field attachment It is formed by attaching the field edge 6 to the field edge receiver 4 using the tool 7. Then, the ceiling plate is attached to the lower surface of the field receiver 4 to form a ceiling.
The hanger 3 includes an attachment piece 10, a support piece 11, and a field edge holding unit 12. A through hole (not shown) for penetrating the suspension bolt 2 is formed in the mounting piece 10. The suspension bolt 2 is passed from the lower end 13 of the suspension bolt 2 through the through hole of the attachment piece 10, and the upper and lower nuts 15; 16 attached to the threaded portion 14 of the suspension bolt 2 are tightened so as to sandwich the attachment piece 10 from above and below. Thus, the mounting piece 10 is fixed to the suspension bolt 2. The support piece 11 extends downward from the mounting piece 10. The lower part of the support piece 11 is provided with a U-shaped field edge holder 12 formed by extending downward from the support piece 11 and folding the tip. The upper portions of the two sandwiching pieces 17; 18 that form the field edge holding part 12 are deformed in a direction approaching each other, and are formed in a restriction part 19; 20 that restricts the upward movement of the field edge receiver 4. . A locking piece 21 that locks on the upper surface 33 of the upper plate portion 31 of the field receiver 4 is formed by a cut-out plate portion in the restricting portion 20 provided on the upper portion of the holding piece 18.
The field edge receiver 4 is formed of a long object having a U-shaped cross section cut in a direction orthogonal to the long direction. The U-shape of the edge receiving portion is formed by an upper plate portion 31 and a lower plate portion 32 that extend in the same direction from the upper end and lower end of the vertical plate portion 30 and face each other in parallel.
The field receiver 4 is fitted and attached in the field receiver holder 12 of the hanger 3.
The field edge 6 is made of a long metal piece having a substantially concave cross section cut in a direction perpendicular to the long direction. The substantially concave shape of the field edge 6 includes a bottom horizontal plate portion 40, a pair of left and right side vertical plate portions 41; 42 extending in the same direction from the left and right ends of the bottom horizontal plate portion 40 and facing each other in parallel. A pair of left and right upper horizontal plate portions 43; 44 extending in a direction approaching each other from the upper ends of the side vertical plate portions 41; 42 and facing each other with a space therebetween, and below the tips of the upper horizontal plate portions 43; 44 It is formed by a pair of left and right hanging plate portions 45; The bottom horizontal plate portion 40 and the upper horizontal plate portion 43; 44 are parallel to each other. The side vertical plate portions 41; 42 and the hanging plate portions 45; 46 are parallel to each other. An engagement groove 47 is formed by the side vertical plate portion 41, the upper horizontal plate portion 43, and the hanging plate portion 45, and an engagement groove 48 is formed by the side vertical plate portion 42, the upper horizontal plate portion 44, and the hanging plate portion 46. Is done.
The field edge fixture 7 includes a support portion 71, an engagement portion 72 provided at a lower portion of the support portion 71, and an attachment portion 73 provided at an upper portion of the support portion 71. The engaging portion 72 is formed in a shape like a heel at the lower end portion of the support portion 71. The attachment portion 73 includes a placement portion 75 that is placed on the upper surface 33 of the upper plate portion 31 of the field receiver 4, and a claw plate-like locking portion 76 that is provided on the distal end side of the placement portion 75. . The engaging portion 72 of the field edge fixture 7 is engaged with the left and right engaging grooves 47; 48 of the field edge 6, and the mounting portion 73 is aligned with the position of the front end edge 31 a of the upper plate portion 31 of the field edge receiver 4. By being bent so as to form a right angle with the support portion 71, the placement portion 75 is placed on the upper surface 33 of the upper plate portion 31 of the field receiver 4, and the rear end of the upper plate portion 31 of the field receiver 4. The locking portion 76 is bent downward in accordance with the position of the edge 30 b, so that the bent locking portion 76 is locked to the outer surface 30 f of the vertical plate portion 30 of the field edge receiver 4. As described above, the field edge 6 is attached to the field edge receiver 4 by the field edge fixture 7.
JP-A-8-13682

  In the conventional ceiling base, the field receiver 4 and the hanger 3, the field edge receiver 4 and the field edge fixture 7, and the field edge receiver 4 and the field edge 6 are in contact with each other. Since each part of the field edge fixture 7 and the field edge 6 is formed of a metal such as steel, for example, the frictional force of the contact surface between the field edge receiver 4 and the other parts is small. For this reason, in the event of an earthquake or the like, the field guard 4 and other parts easily slip each other, and the parts easily move laterally on the horizontal plane, so the hanger 2 and the field edge fixture 7 collide. Or the field receiver 4 is tilted, and the coupling force between the field receiver 4 and other components is weakened, causing the field edge 6, the field edge fixture 7, and the field receiver 4 to fall off. there were.

  The field receiver of the present invention is characterized in that the surface of the field receiver body is provided with a surface layer made of a material having a higher friction coefficient than that of the surface of the field receiver body.

  According to the field receiver of the present invention, the surface of the field receiver body is provided with a surface layer made of a material having a higher friction coefficient than the surface coefficient of the field receiver body. The field guard and the other parts are less likely to slip from each other, and the parts are less likely to move laterally on a horizontal plane, so that the field edge, the field attachment, and the field receiver can be prevented from falling off.

  FIG. 1 shows the best mode 1, FIG. 1 (a) shows a field receiver, and FIG. 1 (b) shows a cross section of the field receiver.

With reference to FIG. 1, the structure of a field receiver will be described. The field receiver 25 includes a metal field receiver body 26 and a surface layer 28 formed on the surface 27 of the field receiver body 26.
The field receiving body 26 is formed of a metal such as steel or stainless steel, or has a metal plating layer such as zinc or aluminum on the surface of a metal such as steel or stainless steel. The field edge receiving body 26 is formed of a long object having a U-shaped cross section cut in a direction orthogonal to the long direction. The U-shape of the field receiving body 26 is formed by a vertical plate portion 35 and an upper plate portion 36 and a lower plate portion 37 that extend in the same direction from the upper and lower ends of the vertical plate portion 35 and face each other in parallel. The
The surface layer 28 is formed by coating the surface 27 of the field receiving body 26 with a high friction coefficient material having a higher friction coefficient than that of the surface 27 of the field receiving body 26. The surface layer 28 is formed by applying a high friction coefficient material to the surface 27 of the field receiving body 26, spraying it, or bonding it. Zinc rich, Kevlar, carbon, ceramic, urethane rubber, etc. are used as the high friction coefficient material.

  For example, the edge receiving body 26 is immersed in a tank containing a high friction paint containing a high friction coefficient material, and a surface layer 28 is provided on the surface 27 of the field receiving body 26 so that the entire surface 27 is covered with the high friction paint. Thus, the field guard 25 can be formed.

  By using a field receiver 25 having a field receiver body 26 and a surface layer 28 according to the best mode instead of the field receiver 4 of FIG. Compared with the case of using the edge guard 25 and the hanger 3, the field edge receiver 25 and the field edge fixture 7, the frictional force of the area contact between the field edge receiver 25 and the field edge 6, that is, the field edge receiver The frictional force of the contact surface between 25 and other parts increases. Therefore, in the event of an earthquake or the like, the surface layer 28 of the field guard 25 makes the field guard 25 and other parts less slippery and restricts the lateral movement of each part on the horizontal plane. Therefore, since the collision between the hanger 2 and the field edge fitting 7 and the inclination of the field edge receiver 25 are restricted, it is possible to prevent the field edge 6, the field edge attachment 7, and the field edge receiver 25 from falling off.

  The surface layer 28 may be provided only on a portion of the hanger 3, the field edge fitting 7, and the field edge 6 that is in contact with the surface edge 28, that is, on the surface except the U-shaped inner surface of the field edge receiving body 26.

(A) is a perspective view of a field guard, (b) is sectional drawing (best form) of a field receiver. The perspective view which shows the structure of the conventional ceiling foundation | substrate.

Explanation of symbols

  25 Field guard, 26 Field guard body, 27 Surface of field guard body, 28 Surface layer.

Claims (1)

  A field receiver comprising a surface layer formed of a material having a higher friction coefficient than a friction coefficient of a surface of the field receiver body on a surface of the field receiver body.

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