JPH07317735A - Fixing device - Google Patents

Abstract

PURPOSE:To provide a device which does not slip off by the change of the temperature and is not dragged and turned in fixing in a fixing device. CONSTITUTION:A clamping bolt 8 is inserted through an upper elastic cylindrical body 2 and a lower elastic cylindrical body 4 to be brought in contact with each other by inclined surfaces 3, 5, and the tip of the bolt 8 is screwed into an eccentric tapped hole of a nut 6, so as to be tightened, and the cylindrical bodies 2, 4 are extended and adhered into a fixed hole 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing device used to fix a sign, a signboard, a screen or other structures on a pavement surface, a stone road surface, a wall, a ceiling surface or the like.

[0002]

2. Description of the Related Art When a structure is to be fixed to a pavement surface or a stone surface afterwards, a fixed portion is excavated and an anchor bolt is embedded therein with concrete, or a concrete block with an anchor bolt is embedded, A method of fixing a structure using this anchor bolt is adopted.

Further, recently, as a method for easily attaching an anchor bolt, a fixing hole is formed on the fixing surface by using a diamond cutter or the like, and an anchor bolt with a nut for causing misalignment (eccentricity) is inserted into the fixing hole. By fixing the nut, the nut can be misaligned and fixed in the fixing hole (for example, actual flat 3-
No. 119606) is known.

[Problems to be Solved by the Invention]

However, the above known example has the following drawbacks.

A. The method of embedding the anchor bolts on site requires a large amount of work, which requires labor, time, and cost.

B. In the case of a combination of a nut that causes misalignment and an anchor bolt, the work is simple, but this fixing hole needs to be slightly larger than the nut because it is necessary to first insert the nut into the fixing hole. For this reason, even when trying to tighten the bolt, the nut side circulates within the fixing hole, and it is often impossible to tighten the bolt side no matter how many times it is turned.

C. In the case of paved road surface, once fixing is finished,
If the paved road surface repeatedly expands and contracts due to a change in temperature after the structure is attached, the frictional force between the nut and the fixing hole may be attenuated and slip out.

D. Since the nut is made of metal and its surface is smooth, even if misalignment occurs due to bolt tightening, the friction surface with the fixing hole is only one point (a line parallel to the core), not the circumferential surface. Therefore, fixed force (friction force)
Has a disadvantage that it cannot be used for those requiring small strength.

An object of the present invention is to eliminate the drawbacks described in a to d in the fixing device.

[0010]

The structure of the fixing device proposed to solve the above problems is as follows. 1. A bolt insertion hole is provided in the center and an inclined surface is formed on the lower end surface, and an inclined surface that slides on the inclined surface of the upper elastic cylinder is formed on the upper end surface and a bolt insertion hole is formed in the center. A lower elastic cylindrical body provided, a nut located on the lower surface side of the lower elastic cylindrical body and provided with an eccentric screw hole, and an eccentric screw hole of the nut passing through the lower elastic cylindrical body from the upper elastic cylinder body A fastening device consisting of a tightening bolt that is screwed into. 2. 2. The fixing device according to the above 1, wherein the upper elastic cylinder and the lower elastic cylinder are partially connected.

[0011]

In the fixing device, a fixing hole (dumb hole) is opened at a fixing position by using a diamond cutter or the like, and a tightening bolt is attached with a washer or an angle in the fixing hole, and the upper elastic cylinder body and the lower elastic cylinder body are When the nut is attached and inserted, and the tightening bolt is tightened, the nut has a screw hole that is eccentric, so that the nut does not go around in the fixing hole due to the eccentric action. When the tightening bolt is further tightened, the nut rises, and the lower elastic cylinder body rises accordingly, and in the course of this rising, the inclined surface acts to cause misalignment (eccentricity) in the upper elastic cylinder body. By the action, the upper elastic cylindrical body is pressed against the inner surface of the fixing hole. Then, as the tightening progresses further, the upper elastic cylindrical body has no escape in the fixing hole, and eventually expands due to the compression force from above (increasing the diameter), and the entire outer peripheral surface comes into pressure contact (close contact) with the entire fixing hole. . At this time, the lower elastic cylindrical body side also expands and comes into pressure contact (contact) with the fixing hole. Not only does it not escape due to the frictional force based on this pressure contact, but even if the road surface repeatedly expands and contracts due to changes in temperature, it is absorbed by the elastic action of the upper elastic cylinder and the lower elastic cylinder, and the frictional force Minimize damping to prevent escape.

[0012]

1 is an exploded perspective view of a fixing device according to the present invention.

1 is a fixing device, 2 is a bolt insertion hole 2 in the center
an upper elastic cylinder formed with a
Is made of an elastic body made of rubber, polyurethane resin or the like, and has a flat upper end surface and a slanting surface 3 for sliding on the lower end surface.

Reference numeral 4 denotes a lower elastic cylindrical body having a bolt insertion hole 4a formed in the center thereof. The cylindrical body 4 is made of an elastic body made of rubber, polyurethane resin or the like and has an outer diameter of the cylindrical body. An inclined surface 5 which is the same as 2 and has the same inclination angle as the inclined surface 3 is formed on the upper end surface.
6 is an eccentric screw hole 7 located on the lower surface of the lower elastic cylindrical body.
It is an attached nut. The nut 6 may have a pointed shape on one side, as shown in FIG.

Reference numeral 8 denotes a tightening bolt, and the tightening bolt 8 has a screw 9 portion from above the upper elastic cylinder 2 and a bolt insertion hole 2a and a lower elastic cylinder 4 bolt insertion hole 4a.
The tip can be screwed into the eccentric screw hole 7 of the nut 6 through the inside. In the figure, 10 is a washer.

Reference numeral 15 denotes a connecting portion which integrally connects the upper elastic cylindrical body 2 and the lower elastic cylindrical body 4, and this connecting portion 1
Although 5 is formed together when the upper elastic cylindrical body 2 and the lower elastic cylindrical body 4 are simultaneously molded, it has a structure that can be easily cut. However, the connecting portion 15 is not always necessary.

Next, an example of using the fixing device will be described with reference to FIGS. 4 and 5. First, using a diamond cutter or the like, a fixing hole (stupid hole) 11 is opened in the fixing surface 14, and the bolt 8, the upper elastic cylindrical body 2, the lower elastic cylindrical body 4, and the nut 6 in which the angle 13 is attached are inserted into the hole 11. Insert them together (Fig. 4) and tighten the bolts 8. By doing so, the nut 6 is prevented from being circulated in the fixing hole 12 due to the eccentric action, so that in FIG.
Rise in the direction. As a result, the upper elastic cylindrical body 2, which is an elastic body, is eccentric due to the action of the inclined surfaces 3 and 5, and is further squeezed to the outside by being pressed from above and below, and due to this action, is pressed (contacted) in the hole 12. At this time, the lower elastic cylindrical body 4 also expands. The angle 12 is fixed by this pressure contact action. This fixed state is shown in FIG.

[0018]

The effects of the fixing device according to the present invention are as follows. a. Since the upper elastic cylinder and the lower elastic cylinder are made of elastic bodies, the fixing device is surely fixed in the fixing hole due to this enlarging action. As a result, slack does not occur even if the fixing hole side changes due to changes in the temperature, etc., and does not slip out as in the conventional case. b. By making the nut eccentric, the nut is fixed in the fixing hole by this eccentric action. As a result, it is possible to reliably prevent supply. c. By integrally connecting the upper and lower cylindrical bodies with the connecting portion, it is convenient when inserting into the fixing hole, and the parts do not disperse, so that the parts can be easily managed.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a fixing device according to the present invention.

FIG. 2 is a sectional view of the fixing device in an assembled state.

FIG. 3 is a plan view showing another embodiment of the nut.

FIG. 4 is an explanatory diagram of a usage example of the fixing device.

FIG. 5 is an explanatory diagram of a usage example of the fixing device.

[Explanation of symbols]

 1 Fixing Device 2 Upper Elastic Cylindrical Body 4 Lower Elastic Cylindrical Body 8 Tightening Bolt 10 Washer 12 Angle

Claims (2)

[Claims] 1. An upper elastic cylinder body having a bolt insertion hole at the center and an inclined surface at the lower end surface, and an inclined surface which slides on the inclined surface of the upper elastic cylinder body at the upper end surface and at the center. A lower elastic cylinder body provided with a bolt insertion hole, a nut provided on the lower surface side of the lower elastic cylinder body and provided with an eccentric screw hole, and a lower elastic cylinder body through the upper elastic cylinder body, A fixing device consisting of a tightening bolt that is screwed into the eccentric screw hole of the nut, and. 2. The fixing device according to claim 1, wherein the upper elastic cylinder and the lower elastic cylinder are partially connected.