JPH0575507U - Fastener - Google Patents

Abstract

(57) [Summary] [Purpose] Even if it is over-tightened to a fragile wall material, the damage to the wall material is as small as possible, and it is possible to always firmly tighten the wall material and the tightening with a simple structure. I try to provide the ingredients. [Structure] A screw rod 2 having a head 3 formed at one end, a screwing portion 5 screwed into a thread of the screw rod 2, and a screw rod 2 connected to the screw rod 5 extending in the direction of the head 3 along the screw rod 2 and in the middle thereof. An aggregate 7 having a bending tendency 10 and a washer 9 continuously provided at an end of the aggregate 7.
And the umbrella-shaped washer 12 in the closed state, which is fitted to the head 3 side and is the outer periphery of the aggregate 7.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastener, and more particularly, to a fastener for tightening a wall material with a screw.

[0002]

[Prior art and problems]

 When holding a desired object on the wall material, it is common to screw a screw into the wall material to hold the object there, but the wall material has a thickness suitable for holding the screw, Even if the wall material is thin, there is no problem if it is screwed into a position where the aggregate such as a crosspiece is reinforced. However, when the screws are installed in places where the wall material is thin or no aggregate is installed behind the screws, the effect of the screws is not sufficient, and especially plasterboard, slate boards, and other fragile materials were used. If the wall material is tightly tightened, it often becomes a so-called "dumb hole", or the part concerned collapses largely as a whole. In order to avoid this drawback, a screw rod having a screw head or a bolt head at one end and a thread formed on the screw rod is used for the base cylinder and the screw rod that are loosely fitted to the head side of the screw rod. A tightening tool has been developed that combines a threaded cylinder screwed into a thread and a crimping material composed of a base tube portion and an aggregate connecting the threaded cylinder. The aggregate of the crimping material is compressed and bent by the backward movement of the plywood, which is crimped behind the wall material. However, the crimping of aggregate is a crimping of wires with multiple aggregates, so to speak, it is not crimping by surface, and therefore excessive pressure is applied locally. When it is embedded in the material, the wall material structure at the crimped portion is destroyed, and the tightening effect cannot be expected at all. In particular, it is often difficult to always tighten properly because this type of device is often used behind the scenes and the tightened state cannot be seen.

[0003]

[Means for solving problems]

 The present invention has been made in view of the above points, and its purpose is to minimize the damage to the wall material as much as possible even if it is excessively tightened to the wall material of the brittle material, The purpose of the present invention is to provide a fastener that can be firmly tightened to the wall material by a surface and has a simple structure.The main point of this is to provide a screw rod having a head at one end and a screw thread of the screw rod. A crimping material composed of a screwing portion to be screwed, an aggregate that is connected to the screwing portion, extends along the screw rod in the head direction, and has a bending tendency in the middle, and a washer connected to the end portion of the aggregate. The fastening tool is composed of an umbrella-shaped washer in a closed state which is fitted around the outer periphery of the aggregate and is fitted to the head side.

Explaining below, in the present invention, a screw rod with a head means a screw head having a screw head or a bolt head having a positive or negative cut at one end, and a screw thread formed on the peripheral surface. It means a rod, and the material may be either metal or plastic. The crimping material is mounted on a screw rod, compressed by the rotation of the screw rod, the middle is broken, and is crimped to the back surface of the wall material to tighten it. It consists of aggregates that are connected and extend along the screw rod in the head direction, and washers that are continuous with the aggregates. The aggregate has a bending tendency in the middle thereof. For example, bend the bent part in the shape of a dogleg or bow or thin the meat. The number of aggregates is 3 to 4. The threaded portion is threadedly engaged with the thread of the threaded rod so as to move toward the head when the head is tightened and rotated. The threaded portion may be of any type as long as the above operation can be performed, and may have a disk shape, a tubular shape, or the like.

The aggregate is connected to this threaded portion and extends along the screw rod in the direction of the head of the end portion so as to surround the screw rod substantially parallel to the screw rod. Connect to a washer that is larger than the diameter. The aggregate may be directly connected to the washer, or may be connected to the rear washer after being converged on the cylindrical body acting as a spacer. It is desirable to form a pawl on this washer to prevent idling. Further, a closed umbrella-shaped washer is fitted near the head of the aggregate of the crimp material. This umbrella-shaped washer is a flat washer when opened, and is fitted so that it is wound around the outer periphery of the aggregate when closed, and the diameter of the closed state is as small as possible. It is desirable to do.

[0006]

[Action]

 Since the present invention is configured as described above, a through hole having a diameter substantially equal to the diameter of the aggregate portion of the crimping material is drilled in the wall material, and a closed umbrella-shaped washer is fitted into the through hole. The aggregate of the fastener according to the present invention is inserted. When the head of the screw rod is rotated in the tightening direction after the nail of the washer of the crimping material has been bitten into the wall material, the screwing portion of the crimping member is screwed toward the head. For this reason, the aggregates connected to the threaded portion are compressed in the head direction, but the part with the bending tendency in the middle bends gradually to become a mountain shape and eventually becomes steep. If you continue to tighten the ridge with a steep slope, it will become a bar perpendicular to the axis of the screw rod, and the back side of the wall material will be pressed. However, in the present invention, since the umbrella-shaped washer is fitted around the aggregate near the head, the umbrella-shaped washer is forcibly expanded in synchronization with the rising of the aggregate. When the material is vertical, the umbrella washer becomes flat and presses the wall material against the washer.

[0007]

【Example】

 Referring to the embodiment shown in the drawings below, 1 is a tightening tool body, and 2 is a screw rod having a head 3 formed at one end. Reference numeral 4 denotes a crimping material, and the crimping material 4 includes a screwing portion 5 that is screwed into the screw rod 2 and a bone that is connected to the screwing portion 5 and extends in the head 3 direction substantially along the screw rod 2 via a base cylinder 6. It is made up of a material 7 and a washer 9 that is connected to the aggregate 7 via a connecting cylinder 8. Reference numeral 10 is a bending point of the aggregate 7, and 11 is a claw of the washer 9. Reference numeral 12 is an umbrella-shaped washer fitted on the aggregate 7 toward the head. 13 is a wall material.

[0008]

【effect】

 As described above, in the present invention, the umbrella-shaped washer fitted to the head side of the aggregate is pre-installed, so that the aggregate rises in response to tightening and the umbrella-shaped washer closed with it gradually opens. When the aggregate is perpendicular to the screw rod, the umbrella-shaped washer becomes flat like a normal flat washer and tightens the wall material flatly with another washer. There is no danger that the aggregate will sneak into the wall material and destroy the wall structure, and since the umbrella-shaped washer is simply fitted along the aggregate, the diameter of the aggregate portion will not become large. Therefore, the diameter of the through hole provided in the wall material is not so large. Furthermore, the component used to achieve such an effect is a washer that is closed like an umbrella, and since it is simply fitted into the aggregate, the structure is simple and the manufacturing cost is low. Is.

[Brief description of drawings]

[Figure 1] Side view

[Figure 2] Partial vertical section of the center

3 is a sectional view taken along line AA of FIG.

FIG. 4 is a perspective view of an umbrella-shaped washer.

FIG. 5 is a partial cross-sectional side view showing a state where the wall member is attached and tightened.

[Explanation of sign]

 1-Fastening Tool 2-Screw Rod 3-Head 4-Crimping Material 5-Screw Part 6-Base Cylinder 7-Aggregate 8-Connecting Cylinder 9-Washer 10-Bending Point 11-Claw 12-Umbrella Washer 13- Wall material

Claims (2)

[Scope of utility model registration request] 1. A screw rod having a head formed at one end, a screwing portion that is screwed into a thread of the screw rod, and a screwing portion that is connected to the screw rod and extends in the head direction along the screw rod and has a bending tendency in the middle. Tightening tool composed of a crimping material composed of an aggregate and a washer connected to the end of the aggregate, and an umbrella-shaped washer in a closed state which is fitted to the head side on the outer periphery of the aggregate. 2. The tightening tool according to claim 1, wherein the head is a screw head or a bolt head with a plus or minus cut.