Patent Description:
In general, objects such as elastic poles or parking stoppers that alert vehicles driving on roads are fixed and installed in drilled holes, which are formed by drilling a soft construction structure such as asphalt roads, using multiple anchor bolts.

For example, in the case of an elastic pole having a circular base board supported by the asphalt road surface, it is installed at the road by anchor bolts, which pass through three holes formed in the base board, to three drilled holes formed in a soft construction structure of the road. In this case, in order to fix the anchor bolts in the drilled hole, metal screws, plastic cable blocks, or anchor bolts are used.

However, in a case where an object to be fixed is a structure such as an elastic pole, when an impact is applied by a traveling vehicle, the impact is directly delivered to the anchor bolts through the drilled holes. If this impact is repeatedly applied, the gap between the drilled holes and the anchor bolts becomes loose. As a result, the structures such as the elastic pole are frequently separated from the soft construction structures such as asphalt roads.

Furthermore, in a case where an obj ect to be fixed is a parking stopper, the anchor bolts for secure the parking stopper are often pulled out due to collisions with the wheels of vehicles. In particular, in underground parking lots, when anchor bolts are pulled out, drilled holes are exposed, leading to water leakage.

In addition, in order to fix an obj ect to a soft construction structure, a plurality of drilled holes must be formed. However, a lot of time and efforts are required in a process of forming the multiple drilled holes or in a process of fitting and fixing anchor bolts into the drilled holes.

Document <CIT> discloses a floor fixing unit for fixing rod unit to floor.

The present disclosure provides a multi-purpose bolt unit for fixing an object to a drilled hole of a soft construction structure, so that the object is easily inserted and fixed into the drilled hole of the soft construction structure such as asphalt roads, asphalt parking lots, underground parking lots, and the like.

The present disclosure also provides a multi-purpose bolt unit for fixing an object to a drilled hole of a soft construction structure, the bot unit which is prevented from being separated once installed in the drilled hole, and which prevents water leakage through the drilled hole.

In an aspect, there is provided a multi-purpose bolt unit for fixing an object to a drilled hole formed in a soft construction structure, the multi-purpose bolt unit including: a cylindrical body inserted into the drilled hole of the soft construction structure; a front end tip formed at a lower end of the cylindrical body and having a larger outer diameter than an outer diameter of the cylindrical body; an upper thread surface formed in an upper side of the cylindrical body while spaced apart from the front end tip; an elastic packing pipe inserted into the cylindrical body and placed on the front end tip; an upper washer inserted into the cylindrical body and placed on an upper end of the elastic packing pipe; a compression nut screwed to the upper thread surface and pressurizing the upper washer so that the elastic packing pipe expands; and a fastening screw groove formed inside the cylindrical body and opened upward through the compression nut.

The multi-purpose bolt unit may further include an anchor bolt screwed into the fastening screw groove through the fixed object and the compression nut.

The multi-purpose bolt unit may further include a plurality of friction protrusions formed in an outer circumferential surface of the elastic packing pipe to increase friction with an inner circumferential surface of the drilled hole.

The compression nut may include: a nut cap screwed to the upper thread surface to be spaced apart from an upper end of the cylindrical body; a cap through-hole formed in an upper side of the nut cap to expose the fastening screw groove; and a wrench groove formed in an upper side of the nut cap, exposing the cap through-hole, and having a wrench inserted therein not to be rotatable.

An inner diameter of the cap through-hole may be larger than an inner diameter of the fastening screw groove and smaller than an inner diameter of the wrench groove.

The multi-purpose bolt unit may further include a lower washer inserted into the cylindrical body to be positioned between the front end tip and the elastic packing pipe.

An outer diameter of the front end tip may be larger than an outer diameter of the cylindrical body and smaller than an outer diameter of the lower washer, and an outer diameter of the elastic packing pipe may be larger than an outer diameter of the lower washer.

According to the present disclosure, since the front end tip formed at the lower end of the cylindrical body inserted into the drilled hole H, the upper threaded surface formed in the upper side of the cylindrical body <NUM>, the lower washer, the elastic packing pipe and an upper washer inserted into the cylindrical body between the front end tip and the upper threaded surface, and the compression nut screwed to the upper threaded surface are included, it is possible for the elastic packing pipe to maintain surface contact with the inner circumferential surface of the drilled hole when the elastic packing tube <NUM> is expanded laterally by rotating the compression nut. The expanded elastic packing pipe is tightly adhered to the inner circumferential surface of the drilled hole, thereby achieving perfect watertightness. In addition, the expanded elastic packing pipe has elasticity so that the expanded elastic packing pipe is not separated from the drilled hole H even when vibration or repeated impact is applied from the outside.

In addition, as the fastening screw groove is provided inside the cylindrical body to be opened upward through the compression nut, it is possible to fasten and fix the anchor bolt, which passes through the object such as an elastic bar, to the fastening screw groove. Accordingly, the object E may be easily installed at the soft construction structure.

In addition, the lower washer, the upper washer, and the elastic packing pipe are inserted into the cylindrical body to be assembled, so when an inner diameter of a drilled hole to be installed is significantly larger than an inner diameter of other drilled holes, a lower washer, a upper washer, and an elastic packing pipe having relatively large outer diameters may be replaced to be inserted into and fixed to the drilled hole. Accordingly, the multi-purpose bolt unit of the present disclosure may be universally applied even if the diameter of the drilled hole vary.

Hereinafter, a multi-purpose bolt unit for fixing an object to a drilled hole of a soft construction structure according to the present disclosure will be described in detail with reference to the accompanying drawings.

In the description of the exemplary embodiments, it is understood that when an element is referred to as being "above" or "on" other element, the terms "above" or "on" includes both the meanings of being "directly" and "indirectly" positioned on the other element. While terms including ordinal numbers, such as "first" and "second," etc., may be used to describe various components, such components are not limited by the above terms. The above terms are used only to distinguish one component from another. The singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise. When a part is referred to as "including" an element, other elements are not excluded therefrom and may be further included unless specified otherwise. In addition, the term such as ". unit" or ". module" should be understood as a unit in which at least one function or operation is processed.

<FIG> is a perspective view of a multi-purpose bolt unit for fixing an object in a drilled hole of a soft construction structure according to the present disclosure, <FIG> is a cross-sectional view of the multi-purpose bolt unit taken along line II-II of <FIG>, and <FIG> is an exploded cross-sectional view of the multi-purpose bolt unit of <FIG>.

As shown in the drawings, a bolt unit <NUM> for fixing an object to a drilled hole of a soft construction structure according to the present disclosure is used to fix an object E to be fixed, for example, an elastic pole, to a drilled hole H that is formed by perforating a soft construction structure. The bolt unit <NUM> includes: a cylindrical body <NUM> inserted into a drilled hole H of the soft construction structure; a front end tip <NUM> formed at a lower end of the cylindrical body <NUM> and having a larger outer diameter than that of the cylindrical body <NUM>; an upper thread surface <NUM> formed in an upper side of the cylindrical body <NUM> while spaced apart from the front end tip <NUM>; an elastic packing pipe <NUM> inserted into the cylindrical body <NUM> and placed on the front end tip <NUM>; an upper washer <NUM> inserted into the cylindrical body <NUM> and placed on an upper end of the elastic packing pipe <NUM>; a compression nut <NUM> screwed into an upper thread surface <NUM> and pressurizing the upper washer <NUM> so that the elastic packing pipe <NUM> expands; and a fastening screw groove <NUM> formed inside the cylindrical body <NUM> and opened upward through the compression nut <NUM>.

There are various soft construction structures such as asphalt roads, underground parking lots, bridges, tunnels, dams, etc. In this embodiment, an asphalt road will be described as an example of the soft construction structure, and an elastic pole will be described as an example of the object E.

The drilled hole H is formed by drilling the soft construction structure and has an inner diameter of about <NUM>. The drilled hole H may be formed by a drill or the like, but may also be formed by a formwork when constructing a soft construction structure.

The cylindrical body <NUM>, the front end <NUM>, the upper thread surface <NUM>, and the fastening screw groove <NUM> form one body, and are manufactured by performing NC processing on a cylindrical body.

The front end tip <NUM> has a larger outer diameter than that of the cylindrical body <NUM>, thereby forming a step at the lower end of the cylindrical body <NUM>. The front end tip <NUM> is mounted so that the elastic packing pipe <NUM>, which will be described later, inserted into the cylindrical body <NUM> is not separated.

The upper thread surface <NUM> is formed in an upper side of the cylindrical body <NUM> to have the compression nut <NUM> screwed thereto. The upper thread surface <NUM> allows the compression nut <NUM> to move forward and backward toward the upper washer <NUM> when the compression nut <NUM> rotates forward and in reverse.

The elastic packing pipe <NUM> and an upper washer <NUM> are inserted into the cylindrical body <NUM> between the front end tip <NUM> and the upper thread surface <NUM>, the elastic packing pipe <NUM> is placed on the front end tip <NUM>, and the upper washer <NUM> is placed on the elastic packing pipe <NUM>.

Meanwhile, the bolt unit <NUM> may further include a lower washer <NUM> inserted into the cylindrical body <NUM> and positioned between the front end tip <NUM> and the elastic packing pipe <NUM>. In this case, in a state of being placed on the front end tip <NUM>, the lower washer <NUM> has the lower end of the elastic packing pipe <NUM> placed thereon.

The elastic packing pipe <NUM> is formed of a rubber material, and the lower washer <NUM> and the upper washer <NUM> respectively located underneath and on the elastic packing pipe <NUM> are formed of a metal material. Accordingly, the elastic packing pipe <NUM> is compressed when a gap between the metal lower washer <NUM> and the metal upper washer <NUM> is narrowed.

As shown in <FIG>, when pressed by the upper washer <NUM>, the elastic packing pipe <NUM> expands laterally, thereby coming into close contact with an inner circumferential surface of the drilled hole H. When strongly pressed by the upper washer <NUM>, the elastic packing pipe <NUM> is elastically compressed and adheres more strongly to the inner circumferential surface of the drilled hole H. Accordingly, even if an impact is repeatedly applied to the multi-purpose bolt unit <NUM> of the present disclosure, the elastic packing pipe <NUM> may remain in surface contact with the inner circumferential surface of the drilled hole H elastically. As a result, the multi-purpose bolt unit <NUM> may be able to maintain a firmly fixed state.

In the outer circumferential surface of the elastic packing pipe <NUM>, there is formed a plurality of friction protrusions <NUM> for increasing the friction with the inner circumferential surface of the drilled hole H when the multi-purpose bolt unit <NUM> of the present disclosure is inserted into the drilled hole H. Each of the plurality of friction protrusions <NUM> has a height of about <NUM> from the surface of the elastic packing pipe <NUM>. Each of the plurality of friction protrusions <NUM> may be in the form of a protrusion protruding from the outer circumferential surface of the elastic packing pipe <NUM> or may be in the form of a ring. In this embodiment, five ring shapes are illustrated as the plurality of friction protrusions <NUM>.

Since the plurality of friction protrusion <NUM> is adopted, as shown in <FIG>, even if the inner diameter of the drilled hole H is larger than the outer diameter of the elastic packing pipe <NUM>, the multi-purpose bolt nut <NUM> may be fixed directly or indirectly to the drilled hole H of the elastic packing pipe <NUM> so that the multi-purpose bolt nut <NUM> cannot be rotatable. Accordingly, the compression nut <NUM> may be rotated using a wrench L.

Here, since the lower washer <NUM>, the upper washer <NUM>, and the elastic packing pipe <NUM> are inserted into the cylindrical body <NUM> to be assembled, it is possible to replace the same with a lower washer, an upper washer, and an elastic packing pipes having different diameters. Accordingly, when an inner diameter of a drilled hole to be installed is significantly larger than an inner diameter of other drilled holes, a lower washer, an upper washer, and an elastic packing pipe having relatively large outer diameters may be replaced to be inserted into and fixed to the drilled hole. Therefore, the multi-purpose bolt unit <NUM> of the present disclosure may be universally applied even if the diameter of the drilled hole H vary.

The compression nut <NUM> is screwed to the upper thread surface <NUM> and presses the upper washer <NUM> so that the elastic packing pipe <NUM> expands. The compression nut <NUM> includes: a nut cap <NUM> screwed to the upper thread surface <NUM> to be spaced apart from an upper end 10a of the cylindrical body <NUM>; a cap through-hole <NUM> formed in an upper side of the nut cap <NUM> to expose the fastening screw groove <NUM>; and a wrench groove <NUM> formed in an upper side of the nut cap <NUM>, exposing the cap through-hole <NUM> and having the wrench L inserted therein not to be rotatable.

The nut cap <NUM> is fastened to the upper thread surface <NUM> so as to be spaced apart from the upper end 10a of the cylindrical body <NUM>, and thus, the nut cap <NUM> may move downward when the compression nut <NUM> is rotated.

The cap through-hole <NUM> is formed in the upper side of the nut cap <NUM> to provide a passage so that the anchor bolt <NUM> for fixing the object E can be fastened to the fastening screw groove <NUM>.

The wrench groove <NUM> is open upward, and may be in the shape of a hexagonal groove so that the wrench L can be fitted not to be rotatable or may be in the shape of + so that a screwdriver type wrench can be fitted.

The anchor bolt <NUM> is to fix the object E, such as an elastic pole, to the drilled hole H formed in the soft construction structure. The anchor bolt <NUM> passes through the cap through-hole <NUM> of the object E and the compression nut <NUM> and is screwed into the fastening screw groove <NUM> to fix the object E.

<FIG> is a cross-sectional view for explaining the relative diameters of the cylindrical body, the front end, the lower washer, the upper washer, the elastic packing pipe and the cap through-hole in the multi-purpose bolt unit of <FIG>.

An outer diameter D2 of the front end tip <NUM> is larger than an outer diameter D1 of the cylindrical body <NUM> and smaller than an outer diameter D3 of the lower washer <NUM>, and an outer diameter D4 of the elastic packing pipe <NUM> is larger than the outer diameter D3 of the lower washer <NUM>. That is, it can be expressed as follows: the outer diameter D4 of the elastic packing tube <NUM> > the outer diameter of the lower washer <NUM> > the outer diameter D2 of the front end tip > the outer diameter D1 of the cylindrical body <NUM>.

Accordingly, the elastic packing pipe <NUM>, whose diameter is significantly larger than the outer diameter D2 of the front end tip <NUM>, may be placed on the front end tip <NUM> by use of the lower washer <NUM> so that the elastic packing pipe <NUM> is not separated from the front end tip <NUM>, and when the elastic packing tube <NUM> is inserted into the drilled hole H, the inner circumferential surface of the drilled hole H does not come into contact with the lower washer <NUM>.

The front end tip <NUM> integrally formed with the cylindrical body <NUM> is formed by cutting an outer circumferential surface of the cylindrical body. At this point, when forming the front end tip <NUM> with a significantly larger outer diameter than the outer diameter D1 of the cylindrical parent material <NUM>, the remaining portion except for the front end tip must be cut using a cylindrical body with a large outer diameter. In this process, a lot of processing effort and cost is required, thereby reducing productivity. Therefore, in order to increase the productivity, it is advantageous if the outer diameter D2 of the front end tip <NUM> is not excessively large compared to the cylindrical body <NUM>. However, when the outer diameter of the elastic packing pipe <NUM> is significantly larger than the outer diameter D2 of the front end tip <NUM>, the elastic packing pipe <NUM> may be separated from the front end tip <NUM>.

For this reason, the present disclosure employs the lower washer <NUM> larger whose outer diameter is larger than the outer diameter D2 of the front end tip <NUM>. Accordingly, although the outer diameter D4 of the elastic packing pipe <NUM> is significantly larger than the outer diameter D2 of the lower washer <NUM>, it is possible to place the elastic packing pipe <NUM> on the front end tip <NUM> by use of the lower washer <NUM>.

In addition, since the outer diameter D4 of the elastic packing pipe <NUM> is smaller than the outer diameter D3 of the lower washer <NUM>, it is possible to prevent that the lower washer <NUM> formed of a metal material damages the inner circumferential surface of the drilled hole H in a process in which the elastic packing pipe <NUM> is fitted to the drilled hole H.

In addition, an inner diameter D6 of the cap through-hole <NUM> of the compression nut <NUM> is greater than an inner diameter D5 of the fastening screw groove <NUM> and smaller than an inner diameter D7 of the wrench groove <NUM>. Accordingly, a function of inserting the wrench L into the wrench groove <NUM> to rotate the compression nut <NUM>, and a function of fastening the anchor bolt <NUM>, which is for fixing the object E, to the fastening screw groove <NUM> through the cap through-hole <NUM> may be implemented.

<FIG> are views for explaining a process of inserting and fix the multi-purpose bolt unit of <FIG> into a drilled hole.

In order to insert and fix the multi-purpose bolt unit <NUM> of the present disclosure into the drilled hole H of the soft construction structure, the multi-purpose bolt unit <NUM> is first inserted into the upper side of the drilled hole H.

Next, as shown in <FIG>, the wrench L is fitted into the wrench groove <NUM> of the compression nut <NUM>, and the compression nut <NUM> is rotated using the wrench L so that a lower end of the nut cap <NUM> presses the upper washer <NUM> downward.

Then, as shown in <FIG>, the pressurized upper washer <NUM> compresses the elastic packing pipe <NUM> while moving downward, and the compressed elastic packing pipe <NUM> expands outward to come into close contact with the inner circumferential surface of the drilled hole H. At this point, since the elastic packing pipe <NUM> comes into close contact with the inner circumferential surface of the drilled hole H, the elastic packing pipe <NUM> may be able to remain in surface contact even an impact is applied repeatedly. Thus, the elastic packing pipe <NUM> may maintain a strongly fixed state.

<FIG> is a view for explaining that an object is fixed by the multi-purpose bolt unit of <FIG>.

In order to fix the object E, such as an elastic pole, to the multi-purpose bolt unit <NUM>, the object E is placed on the multi-purpose bolt unit <NUM> that is fixed to the drilled hole H of the soft construction structure. Then, when the anchor bolt <NUM> penetrating the object E passes through the cap through-hole <NUM> and is screwed to the fastening screw groove <NUM>, the object E is fixed to the multi-purpose bolt unit <NUM>.

As described above, according to the present disclosure, since the front end tip <NUM> formed at the lower end of the cylindrical body <NUM> inserted into the drilled hole H, the upper threaded surface <NUM> formed in the upper side of the cylindrical body <NUM>, the lower washer <NUM>, the elastic packing pipe <NUM> and an upper washer <NUM> inserted into the cylindrical body <NUM> between the front end tip <NUM> and the upper threaded surface <NUM>, and the compression nut <NUM> screwed to the upper threaded surface <NUM> are included, the elastic packing pipe <NUM> may be able to maintain surface contact with the inner circumferential surface of the drilled hole H when the elastic packing tube <NUM> is expanded laterally by rotating the compression nut <NUM>. The expanded elastic packing pipe <NUM> is tightly adhered to the inner circumferential surface of the drilled hole H, thereby achieving perfect watertightness. In addition, the expanded elastic packing pipe <NUM> has elasticity so that the expanded elastic packing pipe <NUM> is not separated from the drilled hole H even when vibration or repeated impact is applied from the outside. That is, the multi-purpose bolt unit <NUM> may maintain a solidly fixed state in the drilled hole H in response to any vibration or impact applied from the outside.

In addition, due to the fastening screw groove <NUM> is provided inside the cylindrical body <NUM> to be opened upward through the compression nut <NUM>, it is possible to fasten and fix the anchor bolt <NUM>, which passes through the object E such as an elastic bar, to the fastening screw groove <NUM>. Accordingly, the object E may be easily installed at the soft construction structure.

In addition, the lower washer <NUM>, the upper washer <NUM>, and the elastic packing pipe <NUM> are inserted into the cylindrical body <NUM> to be assembled, so when an inner diameter of a drilled hole to be installed is significantly larger than an inner diameter of other drilled holes, a lower washer, an upper washer, and an elastic packing pipe having relatively large outer diameters may be replaced to be inserted into and fixed to the drilled hole. Accordingly, the multi-purpose bolt unit <NUM> of the present disclosure may be universally applied even if the diameter of the drilled hole H vary.

Claim 1:
A multi-purpose bolt unit (<NUM>) for fixing an object to a drilled hole formed in a soft construction structure, the multi-purpose bolt unit comprising:
a cylindrical body (<NUM>) for insertion into the drilled hole of the soft construction structure;
a front end tip (<NUM>) formed at a lower end of the cylindrical body and having a larger outer diameter than an outer diameter of the cylindrical body;
an upper thread surface (<NUM>) formed in an upper side of the cylindrical body while spaced apart from the front end tip;
an elastic packing pipe (<NUM>) inserted into the cylindrical body and placed on the front end tip;
an upper washer (<NUM>) inserted into the cylindrical body and placed on an upper end of the elastic packing pipe;
a compression nut (<NUM>) screwed to the upper thread surface and pressurizing the upper washer so that the elastic packing pipe expands; and
a fastening screw groove (<NUM>) formed inside the cylindrical body and opened upward through the compression nut,
wherein the compression nut comprises:
a nut cap (<NUM>) screwed to the upper thread surface to be spaced apart from an upper end of the cylindrical body;
a cap through-hole (<NUM>) formed in an upper side of the nut cap to expose the fastening screw groove; and
a wrench groove (<NUM>) formed in an upper side of the nut cap, exposing the cap through-hole, and suitable for having a wrench inserted therein not to be rotatable,
wherein an inner diameter of the cap through-hole is larger than an inner diameter of the fastening screw groove and smaller than an inner diameter of the wrench groove.