JP2008286336A - Non-flammable and fireproof mechanical blind expansion board anchor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mechanical blind expansion board anchor capable of improving anchor yield strength in a hollow structure or a platy building material and practically achieving an incombustible property and fire resistance. <P>SOLUTION: In a mechanical blind expansion anchor bolt, an inner layer plug 6 is covered with an inner layer plug outer shell 5 composed of an incombustible or fire resistant material and inserted and mounted to an outer layer sleeve 4. The bolt 2 or an eye bolt anchor pin 20 is inserted to a male screw part 6sc which is tapered toward a tip end part 6Ee of an inner layer plug expansion part 6E and a conical part 6 Ein, all the inner layer plug 6, the inner layer plug outer shell 5 and the outer layer sleeve 4 are expanded, fixed and engaged. In the case of fire, if the inner layer plug outer shell 5 is incombustible, all the anchor member is not burnt down but remains and, if the inner layer plug outer shell 5 is flammable, only the inner layer plug outer shell 5 is burnt down but its burnt damage is light and anchor slip off and drop out accident can be avoided. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a mechanical blind expansion board anchor, and more particularly, to a mechanical blind expansion board anchor suitable for use in a hollow structure or a plate-shaped building raw material.

Examples of mechanical board anchors provided for hollow structures and plate-shaped building materials include the following.
(1) A mounting bolt for a hollow structure disclosed in Patent Document 1 below. In this mounting bolt, after a metal plate called a locking blade is inserted through the base material (plate material), it is displaced perpendicularly to the bolt axis on the back side of the base material, and then screwed together. Thus, the locking blade, the front washer, and the nut sandwich and fix the base material wall.
(2) A board anchor disclosed in Patent Document 2 below. In this board anchor, a hollow metal having a slit parallel to its axis is bent and deformed from the middle position of the slit on the back side of the base metal, and is clamped with a washer attached to the front screw by a screwing action. Fix by use.
(3) A fastener disclosed in Patent Document 3 below.
JP 11-44311 A JP 2003-42124 A JP 2003-232318 A Japanese Utility Model Publication No. 6-76503 Japanese Patent Application No. 2005-228385 Specification Japanese Patent Application No. 2005-360363 Patent No. 3933178

However,
(1) The mounting bolt for a hollow structure disclosed in the above-mentioned Patent Document 1 cannot be increased due to the limit of the dimension of the shaft fixing member, and the tensile strength cannot be maintained between the small members. There is a problem of fear of falling off from the stop.
(2) The board anchor disclosed in Patent Document 2 described above has a limit in terms of tensile strength and shear strength because it only works if it is a metal that can be intentionally bent and deformed. In particular, there is a problem that the shear strength is fragile because of screwing with a screw having a small diameter.
(3) In the fastener disclosed in the above-mentioned Patent Document 3, as a result of sliding contact and expansion of the protruding portion and the neck portion of the sleeve and the plug fitted into the sleeve by striking from the front direction, screws The plug (female thread) is fixedly held with respect to the (screw member). (A) Although it seems that screwing of the screw seems to exert an expanding action, the shape of the sleeve and the plug is actually uneven. Since the expansion action is due to the displacement, the expansion state does not change regardless of whether or not the screw threading is installed, so that there is no expansion effect in which the bolt (male thread part) threading acts. (B) Even if the expanded state is prevented from returning to the constricted state as a result of screw screwing, if the taper angle of the screw and the sleeve and plug expansion angle are substantially the same angle, the most for the anchor The required pullout strength (= tensile strength) does not occur. As will be described later, in order to obtain a larger anchor strength, at least the parts to be screwed should be bolts (that is, those not having a taper), and all steps including anchor insertion and expansion It is important not to give damage (load) such as striking and compression to the base material (many raw materials are vulnerable to brittle fracture).

Moreover, all of those disclosed in the above-mentioned Patent Documents 1 to 3 are based on the premise of load and damage to the base material, or conversely, are inevitable conditions for exerting proof stress. For example,
(1) In the mounting bolt for a hollow structure disclosed in the above-mentioned Patent Document 1, the base material (wall body) is clamped on the surface corresponding to the thickness of the locking blade, but the brittle raw material such as gypsum board is used. It cannot withstand the compression of the locking blades due to the bolt pulling action, and it easily dives into the base material, causing the base material to break.
(2) Even in the board anchor disclosed in Patent Document 2, the area where the bent metal piece is placed in contact with the base material and transmits the proof stress is extremely small. In addition, this metal piece tries to cope with the tensile stress around the screw, but there is nothing to support at the outer edge that is bent and folded, and because it uses soft metal, it is easy to It is easy to pull out or break into the base material.
(3) In the fastener disclosed in Patent Document 3 described above, a partial compressive load is instantaneously applied to the base edge (a portion where the proof strength of the plate-shaped raw material is the weakest) when the sleeve and the plug are struck. In addition, it is inevitable that the ball is worn by the structure.
The above weak points are also pointed out in the above-mentioned Patent Document 4 (Japanese Utility Model Publication No. 6-76503).

[Patent Document 6] Japanese Patent Application No. 2005-360363 Patent No. 3933178 In the book, the means enabling the expansion of the outer layer sleeve and the inner layer plug was that the part had to be manufactured using an elastic raw material. . However, in order to achieve both “nonflammability” and “elasticity”, 1. Development of nonflammable synthetic resin 2. Practical use of elastic metal or shape memory alloy could not be avoided.

An object of the present invention is to provide means and a method for practically acquiring “nonflammability” of a board anchor as a building material.

<Outer layer sleeve (4)>
・ To obtain non-combustible and flame-retardant functions, we will manufacture non-combustible non-woven fabrics or raw materials such as non-combustible paper among non-woven fabrics that have become widely commercialized.
・ The cross-sectional shape is circular or polygonal, or has an outer shape that combines circular and polygonal shapes. If it is a circle, it may be an arbitrary number of expansions, and if it is a quadrangle, it will have four expanded parts, and if it is an octagon, it will form an eight-divided expanded part. When screwing and tightening, the outer sleeve slides in the screwing rotation direction = co-rotation, so if the outer cross-sectional shape of the outer sleeve (4), that is, the outer periphery is a circle, a co-rotation prevention claw (4R) is applied. I have to. On the other hand, if it is a polygonal shape such as a quadrangle, the co-rotation preventing claw (4R) becomes unnecessary. However, it is necessary to drill a 1. Similar polygon or 2. “Narrower round hole” that fits the polygon.
The outer layer sleeve (4) is formed with a fitting space (4in) into which the inner layer plug (6) covered with the inner layer plug outer shell (5) is fitted. In FIG. 3, in order to prevent co-rotation at the time of screwing work = idling, the contact portion of the inner layer plug outer shell (5) covering the inner side of the outer sleeve (4), that is, the inner layer plug (6) = It is composed of two sides of the square.
The distance from one end face of the outer sleeve body, that is, the back surface (4Fw) of the outer sleeve flange (4F) formed on the bolt insertion port side, to the slit starting point (4slit) of the outer sleeve expanding portion is gypsum board, etc. This is equivalent to the plate thickness of plate-shaped building materials. The outer layer sleeve (4) is branched by the expanded slit, and a plurality of outer layer sleeve expanded portions (4E1) (4E2) (4E3) (4E4) are formed on the other end surface of the outer layer sleeve body (4B), that is, on the back side of the board. ).
・ The outer sleeve (4) avoids and distributes a single concentration of various external forces and stresses after insertion and expansion in a hole (1h) drilled in plaster board or other plate-like building material (1). The plaster board and other plate-like building materials (1) have a protective function.
• In FIG. 1, the outer sleeve (4) is drawn with a circular shape for both the flange (4F) and the body (4B). The contact with the gypsum board (1) has a co-rotation prevention claw (4R), and the contact with the inner layer plug outer shell (5) and inner layer plug (6) has a co-rotation prevention notch (4J). ing.
FIG. 2 shows a state in which only the outer layer sleeve is inserted into the base material gypsum board (1). Fig. A shows the non-expanded state, and Fig. B shows the expanded state. A small step protrusion may be provided on the outer periphery of the contact edge (4x) with the back surface (1w) of the gypsum board to provide a more stable board clamping effect.

<Inner plug (6)>
・ Manufactured from non-combustible materials such as metal and ceramic, or raw materials such as non-combustible and non-combustible non-combustible paper.
・ The cross-sectional shape is circular or polygonal, or has an outer shape that combines circular and polygonal shapes. If an attempt is made to obtain the effect of preventing co-rotation in the same manner as in Section 0007 <Outer layer sleeve>, it is more effective if the outer cross-sectional shape is an octagon or a composite type of a circle and a polygon.
The inner layer plug (6) includes a trunk portion (6B) composed of one or a plurality of parts and an expanded portion composed of a plurality of parts (6E1sc) (6E2sc) (6E3sc) (6E4sc).
Claim 1 = In FIG. 1, a female screw (6sc) for screwing a bolt (2) is threaded on the inner side of the inner layer plug body (6B) and the inner side of the inner layer plug expansion portion (6E). When not expanded, it is a conical gap. In addition, in FIG. 4, in FIG. 4, a gap portion (6 inB) whose diameter decreases from the trunk portion (6B) toward the distal end portion (6ex) of the expanded portion (6E) is formed, and is smoothed instead of the female screw. It is an inner peripheral surface.
As shown in FIG. 3A, if the method of manufacturing the inner layer plug body (6B) with two parts and the inner layer plug expansion part (6E) with four parts is adopted, the mold forming / die cutting is performed instead of the tapping means. Female threading is realized by means of molding.
As shown in FIG. 4, the eyebolt anchor pin (20) is fitted into the fitting space (6inB) and then inserted straight, thereby expanding the inner layer plug expanding portion (6E) and its action. Accordingly, the outer layer sleeve expanding portion (4E) expands, and the bolt leg tip (20Lt) extends from the tip (6ex) of the inner layer plug expanding portion (6E) to the base material gypsum board (1). The bolt leg collar portion (20Lt) penetrates into the back side space and is hooked and fixed to a plurality of small steps (6Eex1) (6Eex2) (6Eex3) (6Eex4) of the inner layer plug expansion portion (6E) tip portion (6ex). Take the way. The fixing method exerts a function of preventing a drop-off / drop-off when a tensile and shear stress is generated.

<Inner plug outer shell (5)>
A method of manufacturing a raw material such as a non-combustible / incombustible non-woven fabric / non-combustible paper as described in claim 1, and making the entire board anchor “non-combustible”, and as in claims 3-4 Even if it burns and melts in a fire disaster using flammable materials, both methods of making it `` fire resistant '' to suppress the burnout capacity and melting void volume as much as possible and avoid and prevent anchor dropout accidents at the time of the disaster are established .
-When manufacturing with the nonflammable material of Claim 1, the elastic function which endures an expansion displacement is requested | required. The embodiment of claim 3 assumes paper or cloth that burns easily. In either case, the inner layer plug (6) is adhered to the inner layer plug (6) using an adhesive or the like, and the outer surface / outside of the inner layer plug (6) is covered. Even if the paper or cloth having a thickness of less than 1 mm is used, it is assumed that the anchor body does not fall out even if the inner layer plug outer shell (5) is burnt down due to a fire.
In the case of claim 1 and claim 3, a plurality of slits are provided to correspond to the expansion displacement. Inner-layer plug outer shell expanded portion (5E1) (5E2) formed on the other end surface of the inner-layer plug (6B), which branches off from the inner-layer plug outer shell body (5B) and the expanded portion slit start point (5slit) (5E3) (5E4).
・ In addition, an outer shell claw (5J) is provided at a position corresponding to the outer layer sleeve rotation prevention notch (4J) to avoid idling, or the cross-sectional outer shape is a polygon such as an octagon to prevent rotation. To demonstrate. In addition, when the cross-sectional outer shape is circular, the expanded portion parts (6E1) (6E2) (6E3) (6E4) of the inner layer plug (6) are the minimum of four parts. A polygon has the same number of parts as the polygon.
-When the inner layer plug outer shell (5) is made of incombustible nonwoven fabric or incombustible paper, a thin metal plate may be enclosed in the core material. Then, the original restoring force / spring function is exhibited, and a good adhesion effect with the bolt (2) to be screwed is obtained. The spring function is located below the bolt (2) when the anchor is attached to the wall, for example, the inner layer plug outer shell (5E3) (5E4), the inner layer plug expansion part (6E3) (6E4). ) Acquires the effect of adhering to the bolt (2) against gravity. Therefore, smoother screwing behavior is exhibited.
The latex synthetic rubber / urethane inner-layer plug outer shell (5) described in claim 4 utilizes a thin film thickness of 0.02 mm or more already realized in the market. Even if the inner layer plug outer shell (5) is burned down due to a fire, if the thickness is 0.02 mm, for example, the anchor main body is hardly displaced, and there is no need to worry about "anchor dropping phenomenon / accident". Further, since it can be expanded and contracted, it is possible to obtain a reaction force = spring function with respect to the expanding action at the time of bolt screwing or insertion. Furthermore, since the integrated inner layer plug expansion parts are covered with a latex synthetic rubber / urethane spray deposition method or a single thin film in the form of a bag, the bonding process using an adhesive or the like is omitted. be able to.

The inner layer plug outer shell (5) and the inner layer plug (6) manufactured and integrated according to the above-mentioned items 0008 and 0009 are fitted and inserted into the inner layer plug fitting space (4in) of the outer layer sleeve (4). . The male screw part (2msc) of the bolt (2) is inserted and screwed into the female screw part (6fsc) of the inner layer plug (6). By this action, the inner layer plug expanding portion (6E) is expanded. The inner-layer plug expanding portion (6E) pushes the outer-layer sleeve expanding portion (4E) outward, so that there is no loosening in the vertical and horizontal directions with respect to the plaster board and other plate-shaped building material (1), and the anchor is fixed. The name of the invention is called a nonflammable mechanical blind expansion board anchor or a fireproof mechanical blind expansion board anchor.

The outer sleeve (4) and inner layer plug (6) must be manufactured from raw materials such as non-combustible and flame retardant non-woven fabrics, non-combustible paper, metal and ceramics, although it is an absolute requirement to avoid accidental fires. In practice, the inner layer plug outer shell (5) covering the outer side of the inner layer plug (6) is manufactured from raw materials such as flammable papers and fabrics, thereby realizing light weight and reduced manufacturing cost.
When the fire is damaged, the inner layer plug outer shell (5) is burned down, but the outer layer sleeve (4) and the inner layer plug (6) have a non-combustible / flame retardant function, so the bolts screwed into the inner layer plug (6) (2) Although only the burnout gap / space of the inner-layer plug outer shell (5) is displaced, there is no change in the screwed or fitted state. Is not reached. In any case, since it can be assumed that the furniture fixtures that were in the room will not be reused after the fire is burned out, it is not necessary to have a dropout accident or breakage accident.

The thinner the inner-layer plug outer shell (5), the smaller the displacement after burning, so the inner-layer plug (6) coating method using latex synthetic rubber products and urethane products is particularly effective. In this case, it is not necessary to branch / separate from the slit starting point (5 slit) of the expanded portion, and rather, by one-piece molding, the original restoring force = spring function = centripetal stress = squeezing function for the bolt (2). Realize. As described above, the bonding between the inner layer plug outer shell (5) and the inner layer plug (6) becomes unnecessary.

Although the outer layer sleeve (4), the inner layer plug outer shell (5), and the inner layer plug (6) have the same function as described above, the inner layer plug (6) divided parts (6E1sc) (6E2sc) ( In 6E3sc) (6E4sc), it is possible to establish an anchor using parts that are not threaded. The bolt / eyebolt anchor (20) having the eyebolt anchor collar portion (20Lt) shown in FIG. 4 and the leg portion (20L) having a polygonal or circular cross-sectional shape is responsible for fixing and fastening functions. When the flange portion (20Lt) is hooked and fixed to a plurality of small steps (6Eex1) (6Eex2) (6Eex3) (6Eex4) of the inner layer plug expansion portion (6E) tip portion (6ex), it comes off when tensile stress is generated.・ Obtain dropout prevention function.

If the non-flammable or fire-resistant mechanical blind expansion board anchor is used, drilling is performed up to the lightweight steel stud that is located on the back side of the gypsum board and is the gypsum board support, and the studs can be anchored together. Medium weight objects can be fixed on the upper floors of skyscrapers, making it easier to take measures against low-frequency ground motion. In addition, it is possible to compensate for the shortcomings of board anchors that are manufactured and sold mostly from synthetic resin combustibles and are on the market for economic reasons.

It is an invention of an anchor that satisfies all seismic performance, fireproof performance, and economy, and that has not been able to be achieved so far, and is used for fixing, hanging, locking, and suspending metal ducts and other heavy-duty equipment. .

The nonflammable / fireproof mechanical blind expansion board anchor of the present invention has the following effects.
(1) It is possible to avoid the partial load load on the base material and the pull-out accident due to the yielding of the anchor locking shaft, which were problems in the above-described prior art, and increase the pull-out strength only by reinforcing the base material. be able to. For example, in the case of a brittle raw material wall such as a plaster board, a grid-like metal mesh or a steel flat bar or angle steel that has been opened in advance is lined and reinforced, and one of the meshes It is conceivable that the anchor strength is obtained by setting the lattice or the opening portion as an anchor strength opening and expanding and fixing the anchor expansion portion provided with a small step. This reinforcement can be applied to reinforced gypsum boards that are frequently used in medium- and high-rise buildings, and can be used to lock and suspend medium-weight objects such as control panels, vending machines, and air conditioning equipment. . If safe and stable anchor strength can be added to partition materials and ceiling materials such as gypsum board, the necessity and frequency of installing anchor bolts from the slabs constituting each floor and ceiling will be reduced. However, it is thought to contribute to shortening the construction period and reducing the total weight of the structure.
(2) F. R. If P (reinforced plastic) is used, the anchor strength can be obtained by the reinforced shear strength, or the thickness and weight of the plate-like base material can be set by calculating back from the required practical strength. It becomes possible. Like buildings and other aircraft
It is thought to contribute to weight reduction of structures and workpieces.
(3) Since the target material for anchor installation can be used for various types of plate-like building materials as well as wood squares such as 2x4, even in a working environment from only one direction where the nut cannot be fastened because the back side is not accessible. The building material can be locked and bolted. The target materials are wood-based boards (insulation boards, fiber boards, temper boards, particle boards, lumbar cores / single-plate laminates / orientation boards, pararam / wafer boards) and cement-based boards (calcium silicate boards, Flexible board, wood wool cement board, gypsum board, sizing board, reinforced gypsum board, gypsum lath board, makeup gypsum board, sound absorbing hole board, composite gypsum board).

Embodiments of the nonflammable / fireproof mechanical blind expansion board anchor of the present invention will be described below with reference to the drawings.
FIG. 1 follows [Patent Document 6] Japanese Patent Application No. 2005-360363, Japanese Patent No. 3933178.
・ The difference is that the inner layer plug, which is a single unit, is expanded on the body (6B) by the (6E1spB) (6E2spB) slit, which is on the same plane as the base material board (1) shown in Figs. 1A and 1C. It is that it was separated into the open part (6E). By doing so, it is possible to avoid the use of elastic metal or non-combustible synthetic resin material, and to expect the effect of reducing manufacturing costs by mass production using conventional technology, as well as female screw formation and tapping by die casting. It was.
・ (6E), (5E), and (4E) expand as the bolt (2) is screwed, and after tightening and tightening is complete, there is no vertical and horizontal displacement or omnidirectional displacement with respect to the base material board (1). Fixing is complete.
・ When tensile stress is always present after tightening, the load is applied to the friction resistance between the inner layer plug expansion part (6E) and the outer layer sleeve expansion part (5E) and the hole (1h) drilled in the board (1). It is decomposed into compression to the peripheral back surface edge. Therefore, it is important to disperse and reduce the compressive stress on the board by anchoring with the light steel studs.
FIG. 2 shows only the outer layer plug (4) of the screw-type anchor shown in FIG.
・ Non-woven fabric and non-combustible paper must have “stretching force” and “elasticity” that can withstand expansion displacement.

FIG. 3 will be described in detail.
Fig. A shows that the inner layer plug (6) has been manufactured with two parts of the barrel (6B) and four parts of the expanded part (6E) by the die-molding or post-molding tapping method. In FIG. B, a female screw portion for screwing is formed inside.
In FIG. 3, the inner layer plug (6) and the inner layer plug outer shell (5) as a coating are octagonal, and the outer layer sleeve (4) is an octagonal and circular composite type. The reason is to provide a co-rotation prevention function. However, the co-rotation preventing process with the base material board (1) is performed by means of notches formed on the edges of the co-rotation preventing claw (4R) and the board hole (1h) in FIG.
-The inner layer plug outer shell (5) in Fig. C is sprayed with latex synthetic rubber or urethane on the lower (6B1) (6B2) upper (6E1) (6E2) (6E3) (6E4) stacked vertically. Above, solidified. The bag is completely covered with a single bag other than the bolted screw face at the lower end.
・ Figure D shows the outer sleeve. Two functions on the outer periphery of the octagonal shape are left, and a co-rotation preventing function is provided between the inner layer plug (6). Other surfaces are rounded because they are rounded without creases. And the expansion slit (4Esrts) corresponding to the number of inner-layer plug expansion parts is provided, and it is going to expand. Further, a slit (4Esrtg) is formed in the entire vertical direction so as to flexibly correspond to the base material board hole diameter (1h).
Fig. E is a diagram in which the inner layer plug (6), the inner layer plug outer shell (5), and the D diagram = outer layer sleeve (4) are combined, with C diagram = integrated.
-Fig. F shows the state that the screw tightening is completed and the anchor is fixed to the board (1). The inner-layer plug outer shell (5) is stretchable and is in an expanded state when expanded, and a squeezing force is applied toward the center of the bolt shaft.
・ By optimizing the elasticity of the latex synthetic rubber or urethane used for the inner layer plug outer shell (5), each component of the inner layer plug (6) can be integrated without using an adhesive. Will get.

FIG. 4 will be described in detail.
This figure shows an embodiment of the non-screw type eyebolt anchor (20) described in claim 2.
-In order to obtain the expansion action, a pin insertion expansion type is also conceivable as in the present invention. However, since anchor anchoring strength depends only on the bolt flange (20Lt) and the inner layer plug expanded end (20Lt), the strength of the member is required.
-When latex synthetic rubber or urethane is used for the inner layer plug outer shell (5), it is assumed that the eyebolt anchor (20) will expand and contract without being broken even if the pin is inserted.

The biggest element of the invention is
-During non-expansion, the conically shaped inner layer plug expansion female thread part (6sc) leads to the expansion action of the stress that tends to become the cylindrical shape of the bolt as the bolt screwing progresses The anchor body is locked from the back side.
・ When non-expanded, the conically shaped inner plug expansion part (6Ein) expands the stress that tends to become the cylindrical shape of the pin as the eyebolt anchor (20) pin insertion progresses Further, on the back side, the pin collar part (20Lt) of the eyebolt anchor (20) is clamped by the anchor main body collar part (6Lt) and locked from the back side.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the structure of the nonflammable mechanical blind expansion board anchor by one Example of this invention, A is a wall surface board cross-section conceptual diagram at the time of non-expansion. B is a top view from the back side in the bolt axial direction when the same is not expanded. C is a cross-sectional conceptual diagram at the time of expansion, and D diagram is an axial view. The state which mounted | worn only the outer layer sleeve among the nonflammable mechanical blind expansion board anchors by one Example of this invention is shown. A is a conceptual diagram of a cross-section when not expanded, B is a schematic diagram showing the direction of the bolt axis when not expanded, C is a conceptual diagram of the cross-section when expanded, and D is a schematic diagram showing the axial direction of the bolt when expanded. Of the fire-resistant mechanical blind expansion board anchor according to one embodiment of the present invention, a case where latex synthetic rubber or urethane is used for an inner layer plug outer shell is shown. A is a perspective view of each part of the inner layer plug, B is a perspective view of the inner layer plug part assembly, and C is a conceptual diagram of the inner layer plug (4) sprayed with latex synthetic rubber or urethane. D is a perspective view of an outer layer sleeve made of a single non-woven fabric, and E is a perspective view of the outer layer sleeve (4) loaded with latex synthetic rubber or urethane sprayed onto the inner layer plug (4). F is a perspective view of the anchor after completion of expansion and binding. FIG. 2 illustrates a non-screw type anchor pin system among non-flammable and fireproof mechanical blind expansion board anchors according to an embodiment of the present invention. A is intended to insert the inner layer plug (6) and the inner layer plug outer shell (5) after loading the outer layer sleeve (4). B-1 is a conceptual diagram of the cross section when the anchor pin is not inserted and is viewed from the bolt axis direction, and B-2 is a view from the bolt axis direction. C-1 is a conceptual cross-sectional view after the anchor pin is installed and expanded, and C-2 is a top view of the bolt axis direction.

Explanation of symbols

1 Base material board
1h Anchor receiving hole
1w Base material board front
1x Base material board back side
2 bolts
2b Bolt leg
3 Spring washer
4 Outer sleeve
4B outer sleeve body
4E Outer sleeve expansion part Each part (4E1) (4E2) (4E3) (4E4)
4Est1 ・ 2 Outer sleeve expansion part Outline straight line part
4Esrtg Outer sleeve vertical large slit
4Esrts Outer sleeve vertical small slit
4F Outer layer sleeve flange
4Fst1 ・ 2 Outer sleeve flange part
4F Outer layer sleeve flange
4Fv Outer sleeve flange flange front 4Fw Outer sleeve flange back
4x outer layer board back contact
4J Outer sleeve co-rotation prevention claw
4R outer layer sleeve joint prevention nail
4pr Outer sleeve board back side border
4slit outer sleeve slit starting point
5 Inner plug outer shell
5B Inner plug outer shell body
5E Inner layer plug outer shell expansion part Each part (5E1) (5E2) (5E3) (5E4)
5ex inner layer plug outer shell expansion part end
5J inner layer plug outer shell co-rotation prevention claw
6 Inner plug
6B Inner plug body
6E Inner layer plug expansion part Each part (6E1) (6E2) (6E3) (6E4)
6E1exE Inner plug expansion tip
6Bsc Inner layer plug body female thread part (6E1sc) (6E2sc) (6E3sc) (6E4sc)
6Ein Inner layer plastic bolt insertion cone
6Esc Inner plug extension part Female thread part
6Esccorn inner layer plug expansion part female thread part non-expansion cone
6Esce Inner layer plug expansion part Female thread end part (6E1sce) (6E2sce) (6E3sce) (6E4sce)
6E1exA Inner plug expansion slit
6E1spB Inner plug body horizontal slit
6Lt Inner-layer plug hook part Eye bolt anchor pin (20) collar part (20Lt) corresponding part
6sep Inner-layer plug trunk / expansion boundary
20 Eyebolt anchor pin
20b Eyebolt anchor pin leg
20c Eyebolt anchor pin head

Claims (5)

Cross-sectional shape manufactured from raw materials such as non-flammable and non-flammable paper with non-flammable and flame-retardant functions for board anchors that are indispensable for fixing equipment and equipment to plasterboard and other plate-shaped building materials that are often used as non-flammable materials for buildings Is an outer layer sleeve (4) having an outer shape that is circular or polygonal or a combination of a circle and a polygon, the outer layer sleeve flange portion (4F) formed on one end face of the outer layer sleeve body, and the outer layer From the sleeve flange back surface (4Fw) to the other end surface of the outer layer sleeve body (4B), which branches off from the slit starting point (4slit) of the outer layer sleeve expanding portion located at a distance corresponding to the plate thickness of the plaster board or other plate-like building material The outer layer sleeve (4) having a plurality of outer layer sleeve expansion portions (4E1), (4E2), (4E3), and (4E4) formed, and a nonflammable material such as metal or ceramic, or nonflammable An inner layer plug (6) manufactured from a raw material such as non-woven fabric or non-combustible paper having a flame-retardant function and having an outer shape in which a cross-sectional shape is circular or polygonal, or a combination of a circle and a polygon, the inner layer plug body A female screw (6sc) for screwing a bolt (2) is threaded on the inner side of (6B) and on the inner side of the inner layer plug expansion portion (6E), and the inner layer plug body is composed of one or more parts. The inner layer plug (6), and a non-woven fabric / non-combustible material having an incombustible / incombustible function, and an expanded portion comprising a part (6Bsc) and a plurality of parts (6E1sc) (6E2sc) (6E3sc) (6E4sc) Manufactured from raw materials such as paper, has elasticity or expansion displacement resistance, and is bonded to the inner layer plug (6) with a fireproof / heat resistant adhesive, etc., and covers the outer surface / outer side of the inner layer plug (6) The outer layer sleeve (4) and the inner layer plug ( The inner layer plug outer shell expansion formed on the other end face of the inner layer plug (6B), which branches from the inner layer plug outer shell body (5B) and the widening slit starting point (5slit). The inner layer plug outer shell (5) provided with the opening (5E1) (5E2) (5E3) (5E4), and the bolt (2), the outer layer sleeve (4) and the inner layer plug outer shell (5) And the inner layer plug (6) are integrated and inserted into a hole (1h) drilled in a plaster board or other plate-like building material (1), and the outer layer sleeve body (4B) and the expansion of the outer layer sleeve are inserted. A fitting space (4 in) into which the inner layer plug (6) covered with the inner layer plug outer shell (5) is fitted is formed inside the opening (4E), and before the bolt (2) is screwed. In this state, the inner layer plug expansion portion (6E) of the inner layer plug (6) An internal thread portion (6sc) whose diameter decreases from the inner layer plug trunk portion (6B) toward the tip end portion (6ex) of the inner layer plug expansion portion (6E) is formed in the bolt (2 ) Male screw part (2 msc) is inserted and screwed into the female screw part (6fsc) of the inner layer plug (6), thereby expanding the inner layer plug widening part (6E). Accordingly, the non-combustible mechanical blind expansion board anchor is characterized in that the outer sleeve expansion portion (4E) is expanded and fixed to a plaster board or other plate-shaped building material (1).   2. The board anchor according to claim 1, wherein the inner layer plug trunk portion is disposed inside the inner layer plug expansion portion (6E) of the inner layer plug (6) before the bolt (20) is inserted and fixed. A gap portion (6inB) having a smaller diameter is formed from (6B) toward the tip end portion (6ex) of the inner layer plug expansion portion (6E), and is integrated with the inner layer plug outer shell (5) by bonding. After fitting the inner layer plug (6) into the inner layer plug fitting space (4in) of the outer layer sleeve (4), the bolt (20) is inserted into the gap portion ( 6inB), the inner layer plug expansion portion (6E) is expanded, and the outer layer sleeve expansion portion (4E) expands and the bolt leg tip (20Lt) is expanded. Gypsum from the tip (6ex) of the inner layer plug expansion part (6E) Plate and other building materials (1) pierce and displace into the back side space, and the bolt leg flange (20Lk) is a plurality of small steps (6Eex1) (6Eex2) of the inner layer plug widening part (6E) tip (6ex) (6Eex3) (6Eex4) A nonflammable mechanical blind expansion board anchor that is fixed by being hooked and acquires a function of preventing falling-off when a tensile stress is generated.   3. The board anchor according to claim 1 and claim 2, wherein the inner layer plug outer shell body (5B) and the expanded portion slit start point (5slit) are made from a combustible raw material such as cloth, paper, or synthetic resin. The inner-layer plug outer shell (5) provided with an inner-layer plug outer shell expanding portion (5E1) (5E2) (5E3) (5E4) formed on the other end face of the inner-layer plug (6B), A fireproof mechanical blind expansion board anchor characterized by a fixing method to plasterboard and other plate-like building materials (1). The board anchor according to claim 1 and claim 2,
An elastic inner layer plug outer shell (5) made of latex synthetic rubber / urethane, wherein the inner layer plug (6) is screwed on the inner layer plug (6) at the time of expansion after assembling each part. The other than the joint or the surface of the bolt screw joint is tightly covered with the one ultra-thin film, and provided with a spring function that exhibits anti-expansion stress toward the bolt central axis at the time of bolt screw expansion or fixing. A fire-resistant mechanical blind expansion board anchor characterized by a fixing method to plasterboard and other plate-shaped building materials (1) having an inner layer plug outer shell (5). A fixing method / hanging method / locking method for metal ducts and other heavy-duty equipment with respect to gypsum board and other plate-like building materials (1) using the mechanical blind expansion board anchor according to claim 1; Suspension method.

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