JP2003328449A - Board anchor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a board anchor durable against a relatively large load even if it is used in a wall face constituted of a relatively brittle material such as a plaster board. <P>SOLUTION: In the board anchor, the front end side formed of a cap part and a divided member is projected to the rear face of a wall through a hole bored in the wall face to pinch the wall by the divided members widened at the rear face of a flange and a wall. As the pressure receiving area can be made large, even in a wall face constituted of a relatively brittle material such as a plaster board, it can withstand a relatively large load. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a board anchor used for attaching an object to be attached to a wall surface made of a relatively fragile material such as gypsum board.

[0002]

2. Description of the Related Art Conventional board anchors are actually Kaihei 7-3221.
Insert the board anchor tip including the dividing member into the hole made in the wall like No. 2 and No. 1-124411, and expand the dividing member protruding in the hole or on the back side of the wall to expand the board anchor. Was fixed to the wall.

[0003]

However, in the conventional board anchor, since the split member is caught only as a member for preventing slipping out, the pressure receiving area that receives the load applied to the board anchor by the expanded split member. Was less effective. Therefore, in the case of a wall surface made of a relatively fragile material such as a gypsum board, a plywood board, and a particle board, it was impossible to withstand a large load due to breakage around the hole. The present invention has been made in view of these circumstances, and provides a board anchor that can withstand a relatively large load by increasing the pressure receiving area of the board anchor by using a dividing member. .

[0004]

[Means for Solving the Problems] If a load applied to a board anchor can be received in a large area, even a wall surface made of a relatively fragile material such as gypsum board can withstand a relatively large load. . Therefore, in the present invention, the split member is expanded on the back surface of the hole, and the expanded split member is provided with a restraint mechanism such that the shape or posture of the split member does not change even after a load is applied to the board anchor, The structure is such that the load applied to the board anchor is dispersed.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION In the embodiment of the present invention, in the above-mentioned structure, the dividing member 2 on the back surface of the wall is expanded and the jaw portion 4 is formed.
The board anchor is fixed to the wall surface with the partition member 2 sandwiching the wall.

Further, there is a case in which the opening preventing member 9 is attached to the dividing member 2 so that the dividing member does not open more than a set angle.

Further, in the case of the split members 2 which are bent at their centers and come into contact with each other, the contact surface of the split member 2 may be made of a material such as rubber that is not slippery, or the contact surface may be uneven.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

(Embodiment 1) FIG. 1 is a schematic diagram for explaining the construction of a board anchor in which a split member 2 and a pipe portion 3 are connected by an opening prevention member 9. FIG. 2 is a partial explanatory view of the shaft 5 and the jaw portion 4. FIG. 3 is a schematic configuration explanatory view showing a state in which the split member 2 is expanded on the back surface of the wall. The board anchor of Example 1 is used as follows. Since the split member 2 is made to expand in a free state, it is rolled up and inserted into the hole provided in the wall from the tip of the board anchor and pushed into the back surface of the wall to set it in a free state. Then, the split member 2 expands on the back surface of the hole. Therefore, when the handle 51 is pulled toward the wall while the jaw portion 4 is pressed against the wall, the stop member 9 acts so as to sandwich the wall 7 between the split member 2 and the jaw portion 4, thereby fixing the board anchor to the wall. . Shaft 5 pulled out
Is held in a state in which the wedge 41 of the jaw portion 4 fits into the groove 52 provided in the shaft 5 in the state shown in FIG. 2 and stops the shaft 5 from returning to fix the board anchor to the wall. .

FIG. 4 shows an example of the groove 6 formed in the shaft 5, and is an example in which the groove 6 is not formed over the entire circumference but is provided at two locations for 1/4 circumference. Similarly, the wedge 41 is also provided at two locations for each 1/4 turn, so that the board anchor fixed to the wall can be released by rotating the shaft 5 by 90 degrees.

FIG. 5 shows an example in which a groove 52 is formed in a spiral shape between them. Not only is the handle 51 pulled to be fixed to the wall,
By rotating the handle 51 as if tightening the screw, the fixing force can be increased.

(Embodiment 2) FIG. 6 shows an example in which the opening preventing member 9 is provided in the circumferential direction of the dividing member 2, and the opening preventing member 9 and the pipe portion 3 are separated. A bolt 54 is used for the shaft 5. The usage of Example 2 is shown below. Insert the tip into the hole in the wall, the split member 2 expands on the back surface of the hole, and the split member 2
The jaw portion 4 or the bolt 54 is rotated in a state where the person contacts the wall. The stop member 9 connects the split members 2 to each other, but since the length is adjusted, the shape of the split member 2 is fixed in a state where it is expanded like an umbrella, and the jaw portion 4 or the bolt 54. With rotation of (remembering the direction of rotation), the distance between the dividing member 2 and the jaw portion 4 becomes narrower, and finally the jaw portion 4 sandwiches the dividing member 2 and the wall 7 and fixes them.

FIG. 7 is an example in which a fastening tool 10 for mounting the board 11 is attached to the second embodiment.

(Embodiment 3) FIG. 8 is a schematic diagram for explaining the construction of a dividing member 2 of the type which is bent at the center and fixed to a wall. FIG. 9 shows that the split member 2 and the jaw portion 4 are bent at the center.
It is explanatory drawing which shows the state which sandwiched the wall 7 by. The dividing member 2 has a slit in the longitudinal direction and is divided into two or more in the circumferential direction (the dividing number is not particularly limited).
Both ends and the central part of the are processed so that they are easily bent. When the tip portion is projected from the hole formed in the wall 7 to the back surface of the wall 7 and the bolt 6 is rotated in the direction in which the cap portion 1 approaches (a screw is formed in the cap portion 1), the dividing member 2 When it is bent outward at the center and further rotated, the inside of the split member 2 on the side of the cap portion 1 and the inside of the portion on the side of the pipe portion 3 begin to come into contact with each other. Since the inside of the dividing member 2 is provided with irregularities so that the contacting portions are fitted to each other, when the bolt 6 is further rotated, the convex and concave portions are fitted to each other as shown in FIG. It is sandwiched between the jaw parts 4 and the board anchor is fixed to the wall 7 as shown in FIG.

(Embodiment 4) FIG. 10 shows an example used when a bolt is to be attached to the wall 7.

[0016]

The present invention has the above-mentioned structure. According to the present invention, since a wide area of the wall surface is sandwiched and fixed by board anchors, it is made of a relatively weak material such as gypsum board. It is possible to fix a hook for hanging an object and a screw that can withstand a relatively large load on the wall surface.

[0017]

[Brief description of drawings]

FIG. 1 is a schematic structural explanatory view of a board anchor in which a split member 2 and a pipe portion 3 are connected by an opening prevention member 9.

FIG. 2 is a partial explanatory view of a shaft 5 and a jaw portion 4.

FIG. 3 is a schematic structural explanatory view showing a state in which the split member 2 is expanded on the back surface of the wall.

FIG. 4 is an explanatory diagram of a case where a groove 6 is provided on a shaft 5 at two locations for each 1/4 turn.

FIG. 5 is an example in which a groove 52 is formed in a spiral shape.

FIG. 6 shows an example in which a stop member 9 is provided in the circumferential direction of the split member 2.

FIG. 7 is an example in which a fastener 10 for attaching a board 11 is attached.

FIG. 8 is a schematic structural explanatory view of a dividing member 2 of a type that is bent at the center and fixed to a wall.

FIG. 9 is an explanatory view showing a state in which the wall is sandwiched between the dividing member 2 and the jaw portion 4 by bending at the center.

FIG. 10 is an example used when a bolt is to be attached to the wall 7.

[Explanation of symbols]

1 Cap section 2 split members 3 pipe section 4 jaw 41 Wedge 5 axes 50 Hook part 51 handle 52 groove 53 Non-rotating hole 6 bolts 7 walls 8 nuts 9 stop

Claims (3)

[Claims] 1. A hole formed in a wall surface is made to project a tip end side composed of a cap part 1 and a dividing member 2 to the back side of the wall, and the cap part 1 is pulled back to a hand side composed of a jaw part 4 and a hook part 5. The expanded split member 2 and jaw 4 on the back side of the wall.
A board anchor characterized by being fixed to the wall by sandwiching the wall with 2. The board anchor according to claim 1, wherein the split member 2 is set between approximately 30 degrees and 60 degrees by attaching a stop member 9 (which may be axial or circumferential) to the split member 2. Board anchor that is restrained so that it does not open more than the specified angle 3. The board anchor according to claim 1, wherein the split members 2 have a structure in which the split members 2 are bent at the center and the bent split members 2 are in contact with each other. Board anchors characterized by using non-slip materials such as molecular materials, or by forming irregularities on the contact surface so that they do not slip easily