KR102209528B1 - Clamp for reinforcing support of post of guardrail - Google Patents

Abstract

The present invention relates to a clamp for reinforcing the bearing power of a post of a guardrail. More specifically, an objective of the present invention is to improve the reinforcing power of a post by relatively simple facility reinforcement and provide excellent impact absorbing capabilities to reduce the damage of fatal traffic accidents such as collisions with various dangerous objects on a roadside or overturning of a vehicle escaping from a road. According to the present invention, the clamp for reinforcing the bearing power of a post of a guardrail comprises: a band unit (10) made of a metal plate having a prescribed thickness and formed into a U-shape to enclose a post (2); a fastening unit (20) provided with a hole (21) drilled to be fastened by an anchor bolt (3) and horizontally attached to a facility; and a twisting unit (30) positioned between the band unit (10) and the fastening unit (20) to connect the fastening unit (20) in a horizontal direction from the vertically formed band unit (10) in a twisted state.

Description

Clamp for reinforcing support of post of guardrail}

The present invention relates to a clamp for reinforcing the support of the support of the guard rail, and more particularly, the reinforcing force of the support is improved by a relatively simple facility reinforcement, and the shock absorbing ability is excellent, so that the vehicle leaving the lane is overturned or located on the side of the road. It was invented to reduce the damage of fatal traffic accidents such as collisions with various dangerous objects.

In general, guard rails are mainly installed on the edge of roads for safe driving and safe walking.

In particular, the guardrail not only informs the boundary of the road, but also prevents the vehicle from leaving the road due to a driving abnormality of the vehicle, thereby preventing the vehicle from leaving the road or a rollover accident.

Accordingly, most of the members including guardrails can be installed on the edge of the road after confirming that safety is secured even in the event of a vehicle collision through a number of tests.

For example, a flat surface refers to a road in which a flat surface of 60 cm or more is secured from the guardrail post to the outside of the road, and since the post inserted into the ground is firmly inserted into the ground, it can receive sufficient support from the ground. There will be.

However, since most roads cannot secure a flat surface from the place where the guardrail is installed, the safety test for the guardrail, which has been conducted most, cannot be overcome.

In other words, since most realistic guardrail facilities are installed on slopes, it is difficult to ensure safety against vehicle collisions on realistic slopes even if the guardrails and guardrails that pass the collision test on a flat surface are constructed. There is a problem.

On the other hand, the structural performance of the ductile protective fence installed in the embankment is greatly influenced by the supporting force of the support.

The supporting power of the strut is largely different in the type of soil, the degree of compaction, and the water content, as well as the geometrical difference between the ground on which the strut is constructed and the starting point of the embankment slope (BP: Break Point). It is difficult to expect that it will show the support shown in the test site.

The Ministry of Land, Infrastructure, and Transport said that the ductile protective fence installed near the break point (BP) of the embankment section should measure the horizontal support (field support) of the support, and the value should be at least 90% of the horizontal support measured at the actual crash test site. It is regulated by the guidelines for protective safety facilities.

In addition, according to the regulations, it is stipulated that the vehicle protection fence must simultaneously satisfy the structural strength and safety of the occupants to prevent departure of the collision vehicle, and have respective impact levels for each applied road grade, traffic volume, and design speed.

As shown in Table 1 below, the protection fence is divided into 9 classes according to the strength of the facility by the design speed of the applied road, and a test to evaluate the performance according to each condition is performed to ensure that the facility has the strength suitable for each class. Should be.

ranking Collision speed
(km/hour) Vehicle weight
(kg) Collision angle
(°) Standard impact
(kJ) SB1 55 8,000 15 60 SB2 65 90 SB3 80 130 SB3-B 85 150 SB4 65 14,000 160 SB5 80 230 SB5-B 85 270 SB6 80 25,000 420 SB7 36,000 600

SB: Safety Barrier

For these safety regulations, several measures have been proposed to reinforce the support for the guardrail.

That is, as an example, in order to reinforce the supporting force of the existing guardrail support on the ground, a pipe-shaped support reinforcement bar surrounding the outside of the support is additionally installed.

However, in this case, the construction is complicated as well as the facility cost is required to mobilize expensive equipment such as driving gear in order to forcibly strike the support reinforcement belt in the state that the supporter is included inside the pipe on one side of the pipe-shaped support reinforcement. There was a problem.

In addition, a structure to connect the reinforcement post and the reinforcement post after installing a separate reinforcement post or anchor facility to the rear of the guardrail post has been proposed, but there is a disadvantage that it does not provide realistic help in reinforcing the support capacity despite the complicated construction.

Korean Patent Publication No. 10-2006-0026337 (published on March 23, 2006) Korean Registered Patent Publication No. 10-1780971 (Registration date September 18, 2017)

The present invention is to solve the above-described problem, and in detail, the reinforcement of the support is improved by a relatively simple facility reinforcement, and the support of the support of the guard rail is reinforced, which can reduce the damage of fatal traffic accidents due to excellent shock absorption capacity. It is to provide a clamp for use.

Another object of the present invention is to provide a clamp for reinforcing the holding power of a guard rail to provide an economical benefit because the product cost, facility cost, and maintenance cost are inexpensive.

Another object of the present invention is to provide a clamp for reinforcing the support of a guard rail with excellent durability and marketability.

An object of the present invention as described above is made of a metal plate of a certain thickness and is formed in a U-shaped band portion 10 to surround the holding (2), and,

A hole 21 is drilled so as to be fastened through the anchor bolt 3 and a fastening part 20 that is horizontally adhered to the facility,

It is characterized in that it consists of a torsion part 30 that connects the horizontal fastening part 20 in a twisted state from the band part 10 which is positioned between the band part 10 and the fastening part 20 and formed vertically. do.

Here, two or more holes 21 drilled in the fastening part 20 are drilled in plural.

In addition, from the torsion part 30, the band part 10 is characterized in that the cut-out groove 11 is dug toward the inside so as to reduce the width.

At this time, the cutout groove 11 may be formed on both sides of the torsion portion 30 and the band portion 10, respectively.

In addition, the fixing plate 22 through which the holes 21 are drilled is bent at a right angle to the fastening part 20, so that the fixing plate 22 is in close contact with the rear surface of the dyke 1, and the dyke ( 1) can be fixed.

According to the present invention as described above, it is possible to quickly install a desired place by simply forming a long metal plate in the longitudinal direction of a predetermined thickness.

Therefore, the reinforcing power of the post is improved by the reinforcement of the facility through the clamp of the present invention, and when a strong impact is generated by a collision, the torsion part is stretched and deformed, and the shock absorbing ability is excellent due to collision mitigation. Can be reduced.

In addition, in the case of a strong collision that exceeds the designed standard allowable shock force, the shock is absorbed while the fracture occurs, thereby protecting the occupants of the vehicle, including the driver.

In particular, the product cost, facility cost, and maintenance cost are inexpensive, so economical benefits can be provided, and durability and marketability of the product are excellent.

Figure 1 is a perspective view showing the configuration of the clamp for reinforcing the holding force of the guard rail according to the present invention.
Figure 2 is a perspective view showing a post installation state according to an embodiment of the present invention.
3 is an installation state diagram showing a state in which the present invention is fixed to a dyke by an anchor bolt.
Figure 4 is an installation state diagram showing a state in which the present invention is fixed to the end of the road floor with anchor bolts.
Figure 5 is a plan view of Figure 2;
6 is a plan view according to another embodiment of the present invention.
7 is a plan view showing an embodiment according to the configuration of the metal plate immediately before the torsion portion is formed in the present invention.
8 is a plan view showing another embodiment according to the configuration of the metal plate immediately before the torsion portion is formed according to the present invention.
9 is a plan view showing another embodiment according to the configuration of a metal plate immediately before the torsion portion is formed according to the present invention.
10 is a perspective view showing a configuration of bending the fastening portion to be perpendicular to another embodiment of the present invention.
11 is an installation state diagram showing a state in which the fastening part of the clamp according to the present invention is bent at a right angle and fixed to the rear of the dyke with anchor bolts.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below, but may be implemented in a variety of different forms, only these embodiments are intended to complete the disclosure of the present invention, and are common in the technical field to which the present invention pertains. It is provided to fully inform the knowledgeable person of the scope of the invention, and the invention is only defined by the scope of the claims.

In addition, terms used in the present specification are for describing exemplary embodiments and are not intended to limit the present invention.

In this specification, the singular form also includes the plural form unless specifically stated in the phrase. As used herein, “comprises” and/or “comprising” do not exclude the presence or addition of elements other than the mentioned elements.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used as meanings that can be commonly understood by those of ordinary skill in the art to which the present invention belongs.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings in order to describe the present invention in more detail.

The clamp of the present invention is to perform a role of reinforcing the supporting force of the guardrail post against the ground by being fixed to the end of the dyke or the bottom surface of the road in a state surrounding the outside of the post.

The clamp of the present invention is made of a metal plate of a certain thickness and is largely composed of a band portion 10, a fastening portion 20, and a torsion portion 30.

The band portion 10 is formed in a U-shape so as to surround the outer surface of the rod-shaped post 2, and the torsion portion 30 and the fastening portion 20 are sequentially connected to both sides.

The fastening part 20 is located at both ends of the clamp, and one or two or more holes 21 are drilled so as to be fastened through the anchor bolt 3, and it is in a horizontal state in a direction perpendicular to the band part 10. .

1 is a perspective view showing the configuration of a clamp according to an embodiment of the present invention.

As shown in FIG. 1, only one hole 21 may be drilled in each of the fastening portions 20 on both sides.

Figure 2 is a perspective view showing a state in which the clamp of the present invention is installed to be wrapped around the holding (2).

As shown in FIG. 2, three holes 21 may be drilled in each of the fastening portions 20 on both sides.

3 shows a state in which the clamp of the present invention is installed on a road facility in which the dyke 1 is provided.

The support (2) of the guardrail is installed upright with a slight distance to the rear of the dyke (1) and partially inserted into the ground.

In order to reinforce the supporting force with respect to this post (2), the fastening part (20) located at both ends is in close contact with the upper surface of the dyke (1) while the band part (10) is wrapped around the rear of the post (2) The fastening part 20 is fastened and fixed through the anchor bolt 3 at.

At this time, it is okay to drill only one hole 21 through which the anchor bolt 3 can pass through the fastening part 20 as shown in FIGS. 1 and 6, but two or more as shown in FIGS. 2 and 5 , Preferably, it is better in terms of length adjustment according to the installation position of the post (2) to drill three holes (21).

In addition, by making a plurality of holes 21 in the fastening part 20, when a vehicle collides with the post 2, when a large impact exceeding the allowable strength is applied, at any one of the holes 21 It absorbs the impact by allowing fracture to occur.

The anchor bolt 3 is passed through only one of the holes 21 drilled in the fastening part 20, and the clamp of the present invention is firmly installed by placing the ground on the edge of the dyke 1 or the road.

Therefore, when a strong impact force exceeding the allowable strength held by the clamp is applied due to a traffic accident, etc., breakage occurs at any one of the plurality of holes 21 and absorbs the impact to the vehicle and passengers boarding the vehicle. You can protect them.

In addition, a torsion part 30 is provided between the band part 10 and the fastening part 20.

The torsion part 30 is positioned between the vertically shaped band part 10 to surround the post 2 and the fastening part 20 in the horizontal direction and twisted in a direction approximately 90 degrees to connect to each other. do.

The torsion part 30 serves to connect the band part 10 and the fastening part 20 and at the same time, when a strong impact is transmitted in the installed state, the torsion part 30 is slightly loosened and acts as a spring to absorb the impact force. do.

On the other hand, in the clamp of the present invention, it is preferable that the cut-out groove 11 is drilled toward the inside so that the width of the band portion 10 positioned between the torsion portion 30 is reduced.

The width of the clamp is reduced by this cut-out groove 11, and in particular, a weak portion is provided at the boundary where the cut-out groove 11 is formed at a right angle toward the inside. As fracture occurs, it has a role of absorbing the impact force.

FIG. 4 illustrates a state in which the clamp of the present invention is installed through the anchor bolt 3 directly to the end of the floor surface of the road for use in which the dyke 1 is not installed among road facilities.

5 and 6 respectively show an embodiment according to the number of holes 21 drilled in the fastening portion 20 in plan view.

7 is a plan view showing an embodiment according to the configuration of a metal plate in a state immediately before the torsion portion 30 is formed in the clamp of the present invention.

As shown in this figure, a cutout groove 11 may be formed only in one of the longitudinal directions for the breaking role.

8 is another embodiment according to the configuration of a metal plate in a state immediately before the torsion part 30 is formed in the clamp of the present invention, and the cut-out groove 11 is disposed on both sides of the torsion part 30 and the band part 10, respectively. Can be molded.

9 shows another embodiment according to the configuration of a metal plate in a state immediately before the torsion part 30 is formed in the clamp of the present invention.

That is, according to the embodiment shown in FIG. 9, as shown in FIGS. 7 and 8, the cut-out groove 11 is not entirely extended along the length direction, but is concave to a short length to form a weak portion.

Therefore, when an impact of more than the permissible strength is applied to the post 2, fracture can be made at the position of the cut-out groove 11.

10 is a perspective view showing a configuration in which the fastening portion is bent at a right angle according to another embodiment of the present invention.

FIG. 11 shows a state in which the fastening part of the clamp according to the embodiment shown in FIG. 10 is bent at a right angle and fixed to the rear surface of the dyke with anchor bolts.

That is, as shown in Figs. 10 and 11, the fixing plate 22 through which holes 21 are drilled in the fastening portions 20 located at both ends of the clamp of the present invention is bent at a right angle, After the fixing plate 22 is positioned so as to be in close contact, it is fixed to the dyke 1 through the anchor bolt 3.

In this way, depending on the distance at which the post (2) and the dyke (1) are installed and the surrounding situation, the fastening part (20) is formed horizontally and fixed to the upper surface of the dyke (1), or as shown in FIG. It can also be fixed to the back of 1).

In general, the guardrail crash test is designed to perform two types of tests: a car crash test and a freight car crash test.

The passenger car crash test evaluates the risk of collision of the occupants when colliding with the safety facilities of the vehicle.

In addition, the truck crash test evaluates only the strength of the vehicle's safety facilities.

It is stipulated that the occupant protection performance according to the guidelines for vehicle protection and safety facilities of the Ministry of Land, Infrastructure and Transport is evaluated according to the criteria shown in Table 2 below by using a passenger vehicle as a test vehicle and calculating THIV and PHD in the test conditions for each grade.

Criteria for evaluating occupant protection performance

Standard item unit Limit value Passenger-compartment collision speed
(Vertical/transverse) THIV km/hour 33 After occupant-compartment collision
Maximum acceleration (vertical and horizontal) PHD g 20 Note) g: 9.8 m/s ²

Here, THIV (Theoretical Head Impact Velocity, occupant-compartment collision velocity): One of the indexes for evaluating the collision risk of the occupant when the vehicle collides with the safety facility. It is said that the occupant's head freely flies at the vehicle's collision speed. Reportedly, it refers to the instantaneous relative speed between the vehicle and the idealized occupant's head when the head freely flows and collides with the virtual surface of the vehicle interior space while the vehicle collides with the facility and is decelerated.

PHD (Post-impact Head Deceleration, maximum acceleration after occupant-compartment collision); It refers to the maximum value of the vehicle's 10m/sec average acceleration calculated after THIV is calculated as it is assumed that the occupant receives the acceleration of the vehicle as it is by maintaining contact after hitting the virtual surface of the vehicle interior space.

If the strength of the post (2) including the guard rail is too great, the THIV and PHD will be large.

The limit value presented in the table above is the maximum that the occupant can tolerate in the event of a vehicle collision, and if the limit value is exceeded, the occupant falls into a coma and releases the steering wheel of the vehicle, and the vehicle becomes out of control, resulting in a secondary accident. Concerns are high.

Therefore, if the THIV and PHD are too high, it becomes difficult to protect the rider.

However, as shown in the drawings, the clamp according to the present invention can satisfy all of the collision test limit values according to the guidelines for vehicle protection and safety facilities of the Ministry of Land, Infrastructure and Transport.

Specifically, when forming the clamp, depending on the thickness and width of the metal plate, and the number of holes 21 and the number of cutouts 11, the vehicle is selected to form only one on one side or two on each side. In addition to reinforcing the bearing capacity that can be allowed by a collision, it is possible to satisfy all of the regulations stipulated in the above guidelines by designing variously designed shock absorbing capacity according to fracture.

According to the clamp configuration of the present invention, when a strong impact is generated by a collision as well as the reinforcement of the holding power of the post, it is stretched and deformed in the torsion part, or the impact is made by breaking at the location of the hole 21 and the cutout groove 11 It is able to protect the vehicle and the occupants inside the vehicle, including the driver.

As described above, the present invention has been described with reference to the embodiments shown in the drawings, but this is only for describing the invention, and for those of ordinary skill in the art to which the present invention belongs, various modifications or equivalents from the detailed description of the invention It will be appreciated that one embodiment is possible.

Therefore, the true scope of the present invention should be determined by the technical idea of the claims.

10-band part
11-Cutting groove
20-fastener
21-hole
22-fixing plate
30-torsion

Claims (5)

A band portion 10 made of a metal plate of a certain thickness and formed in a U-shape to surround the support 2
A hole 21 is drilled so as to be fastened through the anchor bolt 3 and a fastening part 20 that is in close contact with the facility horizontally,
A torsion part 30 which connects the horizontal fastening part 20 in a twisted state from the band part 10 which is positioned between the band part 10 and the fastening part 20 and formed vertically,
Supporting force of a guardrail, characterized in that a cutout groove (11) is formed at a right angle toward the inside so that the width dimension is reduced from the torsion part (30) to the band part (10) to absorb the impact force while breaking when a strong shock is transmitted. Reinforcement clamp.
The method according to claim 1,
The clamp for reinforcing the support of the support of the guard rail, characterized in that the holes 21 drilled through the fastening part 20 are drilled in a plurality of two or more.
delete The method according to claim 1,
The cut-out groove 11 is a clamp for reinforcing the support of the holding force of the guard rail, characterized in that each formed on both sides of the torsion portion 30 and the band portion 10.
The method according to claim 1,
In the fastening part 20, the fixing plate 22 through which the holes 21 are drilled is bent at a right angle, and the fixing plate 22 is in close contact with the rear surface of the dyke 1, and the dyke 1 through the anchor bolt 3 Clamp for reinforcing the support of the support of the guard rail, characterized in that fixed to.

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