KR102542424B1 - Schmidt hammer quickness strike point indicator for safety inspection and diagnosis - Google Patents

Abstract

The present invention relates to a Schmidt hammer quick striking point indicator for safety inspection and diagnosis. A purpose thereof is to strike a structure with a Schmidt hammer for hardness measurement, quickly mark a striking point to strike with the Schmidt hammer and quickly repair damage occurring in the marking part. In accordance with the present invention, the Schmidt hammer quick striking point indicator for safety inspection and diagnosis includes: a spray connection part (10) to which a spray is connected; a spray induction cover (20) formed in front of the spray connection part and inducing a spray solution sprayed from the spray to mark a plurality of striking points while preventing scattering thereof; a marking sheet (30) disposed in front of the spray induction cover with marking holes (31) perforated at regular intervals in longitudinal and transverse directions, and causing the spray solution sprayed from the spray to be sprayed to the surface of the structure through the marking holes; a storage drum (40) separably mounted on one side of a circumferential part of the spray induction cover and storing the marking sheet wound thereon; and a collection drum (50) rotatably mounted on the opposite side of the storage drum as the circumferential part of the spray induction cover and winding and collecting the marking sheet unwound from the storage drum. Therefore, the Schmidt hammer quick striking point indicator marks the striking points while unwinding the marking sheet wound on the storage drum and collecting the marking sheet into the collection drum.

Description

Schmidt hammer quickness strike point indicator for safety inspection and diagnosis}

The present invention relates to a hitting point indicator for non-destructive testing (Schmidt hammer) of a concrete structure, and more particularly, to measure the hardness by hitting a structure with a Schmidt hammer, and at this time, quickly marking the hitting point to be hit with the Schmidt hammer It relates to the Schmidt hammer quick hit point indicator for safety inspection and diagnosis.

This section provides background information related to the subject matter of this application and is not necessarily prior art.

In general, as the number of aging social infrastructures increases, it has become a current issue that non-destructive testing of structures is emerging as an important task to secure the safety of existing structures along with safe maintenance of these infrastructures. In addition, cases of remodeling structures in consideration of economic feasibility, usability, and efficiency are increasing. Even in these cases, non-destructive testing is emerging as very important in relation to safety evaluation of structures and recyclability evaluation of demolition facilities. In particular, in the case of existing social infrastructure, steel and concrete are used as the main materials, and concrete accounts for a larger portion of these two representative construction materials, so non-destructive testing of concrete is important.

There is a Schmidt Hammer Test widely used as a non-destructive inspection method for existing concrete facilities.

The Schmidt hammer method draws 4 parallel horizontal lines using chalk and a ruler at intervals of 3 cm each in the horizontal direction on the concrete surface of the measurement target, and then leaves them at intervals of 3 cm along the vertical direction so that they are orthogonal to the horizontal line. After drawing 5 vertical lines, the hardness inside the concrete structure is measured by hitting the Schmidt hammer at the orthogonal points (20 points) of each horizontal and vertical line.

However, whenever the hardness of a concrete structure is measured, drawing 5 (longitudinal) X 4 (lateral) orthogonal straight lines at 3 cm intervals is very cumbersome in terms of work, relies on the operator's manual work, and takes a long time to measure. has a downside

As a patent document that can confirm the background art of the present invention, Registration Patent No. 10-1927688 is a spray paint contact surface formed in a streamlined shape similar to the surface of the storage part of the spray paint to hold the spray paint consisting of a spraying part and a storage part to the inside. And a fixing jaw for fixing the upper side of the spray paint reservoir is formed on the upper side of the spray paint contact surface, and a holder coupling groove extending from the lower side to the upper side is formed on the outside, and is connected to the holder coupling groove. A holder consisting of a cradle forming a fixed knob coupling hole in the form of a long hole in the vertical direction, an insertion member slidably inserted into the holder coupling groove of the cradle, and a support member for fixing the lower surface of the spray paint storage unit And, a spray paint holding unit composed of a fixing knob for fixing the insertion member of the holder by being coupled to the fixing knob coupling hole of the holder, and a ball joint formed on the holder; a fixed frame rotatably coupled in up, down, left, and right directions by a ball joint of the spray paint holder; A first opening coupled to the fixing frame and disposed at the spraying part formed in the spray paint mounted on the spray paint holding part and the upper, lower, left, and right as the spray paint extends in the direction in which the paint of the spray paint is sprayed from the first opening part a diffusion cover including a side plate extending to the right, a second opening formed at an end of the side plate and communicating with the first opening, and an elastic material coupling groove formed at an end of the second opening; an elastic material inserted into the elastic material coupling groove of the diffusion cover; A spray cover made of a soft material coupled to the second opening of the diffusion cover but elastically supported by an elastic material and including a plurality of display parts through which the paint sprayed through the spray paint spray part passes. It is a marking device for marking the impact point for the Schmidt hammer, and it is difficult to repair quickly when the spray cover is damaged, so it is inconvenient to not work until it is replaced with a new spray cover or to always prepare the spray cover in consideration of replacement. .

In addition, there is also a problem that is inconvenient to store and carry because the volume of the marking device including the spray cover and the like is large.

Registered Patent No. 10-1927688

The present invention is intended to solve the above-mentioned problems, by hitting the structure with a Schmidt hammer to measure hardness, and at this time, quickly marking the hitting point to be hit with the Schmidt hammer, and quickly repairing even if the marking part is damaged The purpose is to provide a Schmidt hammer quick hit point indicator for safety inspection and diagnosis at work.

The Schmidt hammer quick hit point indicator for safety inspection and diagnosis according to the present invention includes a spray connection part to which a spray is connected; a spray guide cover formed in front of the spray connection unit and preventing scattering while inducing a plurality of hitting points to be marked with the spray liquid sprayed from the spray; a marking sheet having marking holes perforated at regular intervals along the longitudinal and transverse directions and disposed in front of the spray induction cover so that the spray liquid sprayed from the spray passes through the marking holes and is sprayed onto the surface of the structure; a storage drum detachably mounted on one side of the circumferential portion of the spray induction cover and in which the marking sheet is wound and stored; A circumferential part of the spray guide cover and rotatably mounted on the opposite side of the storage drum, including a recovery drum for winding and recovering the unwound marking sheet from the storage drum, and recovering the unwinding marking sheet from the storage drum to the recovery drum. It is characterized by performing one or more hitting point marking operations while doing so.

According to the Schmidt hammer quick hitting point indicator for safety inspection and diagnosis according to the present invention, a flexible marking sheet with a perforated marking hole is applied in a roll form to quickly display the hitting point without the inconvenience of carrying and replacing a marking plate. Therefore, it has the effect of shortening the time of marking the hitting point and safety diagnosis using the Schmidt hammer.

In addition, since the marking sheet has flexibility, even if the surface of the structure is uneven, it is possible to mark the impact point and reduce shaking during work, so the work is very easy.

In addition, the spray inducing cover is configured in a folding type to reduce the volume, so that storage and portability are very easy.

1 is a perspective view of a Schmidt hammer quick hitting point indicator for safety inspection and diagnosis according to the present invention.
Figure 2 is an exploded perspective view of the spray guide cover applied to the Schmidt hammer quick hit point indicator for safety inspection and diagnosis according to the present invention.
Figure 3 is a side view showing a striking point display operation using the Schmidt hammer rapid hitting point indicator for safety inspection and diagnosis according to the present invention.
Figure 4 is a side view showing a scraper applied to the Schmidt hammer quick hit point indicator for safety inspection and diagnosis according to the present invention.

In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of a user or operator. Therefore, the definition should be made based on the contents throughout this specification.

As shown in Figure 1, the Schmidt hammer quick hit point indicator for safety inspection and diagnosis according to the present invention uses a ready-made spray (so-called "lacquer paint") 1 with a color spray liquid stored therein By marking the hitting point, the spray connection part 10 to which the spray 1 is connected, the spray guide cover 20 for inducing the spray liquid sprayed from the spray 1, and the spray liquid sprayed from the spray 1 are constant. It includes a marking sheet 30 for marking a plurality of hitting points at intervals, a storage drum 40 for storing the marking sheet 30, and a recovery drum 50 for collecting, and the spray guide cover 20 is a hitting point During marking, the marking sheet 20 is spread to an area where 20 hitting points are marked, thereby marking a plurality of hitting points hit by the Schmidt hammer at once.

The spray connection unit 10 may have various structures connected to the spray 1, such as surrounding the circumference of the spray 1 and supporting the bottom.

As shown in FIGS. 2 and 3, the spray guide cover 20 guides the spray liquid sprayed from the spray nozzle of the spray 1 to the marking sheet 30, the nozzle holder unit 21, the nozzle holder unit ( 21) includes a diffusion part 22 formed at an angle widening toward the front, and a marking sheet alignment frame part 23 formed in front of the diffusion part 22, the nozzle holder part 21 and the diffusion part 22 At least one side of the spray connection portion 10 and integrally formed or connected.

The nozzle holder part 21 is tubular (frame) with a larger diameter than the injection nozzle of the spray 1.

The injection nozzle of the spray 1 is placed in the center for marking the 20 hitting points, and at this time, the spray connection part 10 and the nozzle holder part 21 can clearly mark the hitting points on the periphery. At least one side of ) is preferably configured so that the spray 1 moves so that the spray direction of the spray 1 can be changed up, down, left and right. For example, a corrugated pipe capable of moving the nozzle holder 21 vertically and horizontally may be included between the nozzle holder unit 21 and the diffusion unit 22 . At this time, the spray connection part 10 is connected to the nozzle holder part 21 and moves freely up, down, left and right together with the nozzle holder part 21 by the corrugated pipe, or a joint (eg, a ball joint) in the spray guide cover 20 , cross-shaped joints) may be movably connected.

The diffusion part 22 has a structure in which the area of the spray liquid sprayed from the spray nozzle of the spray 1 widens while going to the marking sheet 30 so that 20 hitting points can be marked.

The marking sheet alignment frame part 23 is a support for installing the recovery drum 50 and the storage drum 40 so that the marking sheet 30 is spread so as to mark 20 hitting points, and facing each other on both sides of the circumferential part. It provides a foundation, and for this purpose, it is composed in the form of a square frame.

Here, the marking sheet alignment frame unit 23 is preferably a folding type in which two frame members arranged symmetrically up and down are hinged to each other in order to reduce the volume of the spray guide cover 20 .

In addition, the diffusion part 22 may be a plate material, but one side is connected to the square corner part of the marking sheet alignment frame part 23 for manufacturing, maintenance, folding, etc., while the other side is connected to the nozzle holder part 21. It may include a straight frame 22a and a cover 22b made of a flexible material covering the space between the frames 22a. The cover 22b has a structure in which one cover covers the entire diffusion part 22, and a structure in which the circumferential portion is fixed to the adjacent frame 22a or the marking sheet alignment frame 23 while covering the space between the adjacent frames 22a. etc. is possible.

The marking sheet 30 is a flexible material (vinyl, etc.) to be wound around the storage drum 40 and collected in the recovery drum 50, and includes marking holes 31 along the longitudinal and transverse directions. Therefore, the marking sheet 30 is used so that a total of 20 marking holes 31 are visible between the recovery drum 50 and the storage drum 40, so that the spray liquid is sprayed through the 20 marking holes 31 when the spray 1 is sprayed. While passing through), it is sprayed on the surface of the structure 1 so that the hitting point is marked.

The marking hole 31 can be not only in the form of a dot, but also in the form of a checkerboard, and at this time, the place where the lines meet becomes the hitting point.

The marking sheet 30 is stored in a roll form on the storage drum 40, and the length at this time is longer than the length for marking the 20 hitting points, and thus, the hitting points are set so that the 20 marking holes 31 are visible. If damage is caused during marking, the striking point can be marked by exposing a new part wound on the storage drum 40.

Since the marking sheet 30 is recovered by being wound around the recovery drum 50 in a state unwound from the storage drum 40, it is very easy to dispose of the already used portion, and the end is pinned to the recovery drum 50 to be fixed or recovered. It is fixed to the recovery drum 50 by forming a protrusion on the drum 50 and inserting and fixing it or fixing it by bonding or the like.

The storage drum 40 is disposed, for example, on the upper part of the circumference of the spray guide cover 20, and protrudes upward on both left and right sides of the upper part of the marking sheet alignment frame 23 of the spray guide cover 20, respectively. It is rotatably mounted to the bracket 24 through a shaft pin 41. For example, the shaft pin 41 is detachably coupled to the bracket 24 and fitted into a hole formed in the center of the storage drum 40 to rotatably support the storage drum 40 .

The recovery drum 50 is rotatably mounted on the opposite side of the storage drum 40, that is, on the left and right sides of the lower part of the marking sheet alignment frame 23, respectively, to brackets 25 protruding downward through shaft pins 51. For example, the shaft pin 51 is detachably coupled to the bracket 25 and fitted into a hole formed in the center of the recovery drum 50 to rotatably support the recovery drum 50 .

The storage drum 40 may be elastically supported in the direction of winding the marking sheet 30, and at this time, the recovery drum 50 is configured in the direction of winding the marking sheet 30 through a configuration of a latch and a latch wheel or a one-way gear. It can be installed, and through their configuration, it is possible to keep the marking sheet 30 flat.

In addition, a flat roller 60 may be included as a flat member to maintain flatness of the marking sheet 30 between the storage drum 40 and the recovery drum 50 .

The flat roller 60 is arranged in the left and right transverse directions inside the marking sheet alignment frame unit 23, and both left and right sides are connected (preferably rotatably connected) to the marking sheet alignment frame unit 23, respectively, so that the marking sheet 30 To keep the position attached to or close to the surface of the structure (1) without crying toward the spray (1), more than one is applicable.

For an effect similar to that of the flat roller 60, a contact member may be further included. The adhesion member is mounted on the marking sheet alignment frame 23 of the spray induction cover 20 to be able to move forward and backward toward the structure 1 to support the marking sheet 30 so as to adhere to the surface of the structure 1. , plate type, roller type, etc. are possible, and an elastic member having an elastic force in the direction of attaching the marking sheet 30 to the surface of the structure 1 may be applied together.

In addition, a cleaning roll 70 (see FIG. 4 ) may be included to remove spray liquid sprayed on the inner surface of the marking sheet 30 when the marking sheet 30 is wound around the recovery drum 50 . The cleaning roll 70 is a surface or brush-type roller or plate-type installed above the recovery drum 50 as a lower part of the spray guide cover 20, and scratches the surface of the moving marking sheet 30 in a fixed state to spray liquid. is removed, and thus, the contamination of the marking sheet 30 is reduced, and the reuse of the marking sheet 30 is very easy.

The method of displaying the hitting point using the Schmidt hammer rapid hitting point indicator for safety inspection and diagnosis according to the present invention is as follows.

1. Mount the hit point indicator.

The hitting point indicator is mounted on the surface of the structure 1 to mark the hitting point.

At this time, the marking sheet 30 is in a state in which 20 marking holes 31 are exposed.

2. Spray dispensing.

When the spray button of the spray (1) is pressed, the spray liquid is sprayed through the spray nozzle. The spray liquid is sprayed toward the 20 marking holes 31 through the diffusion part 22 of the spray induction cover 20, passes through the marking holes 31, and is sprayed on the surface of the structure 1 to mark the hitting point. .

That is, since the hitting point can be marked only by pressing the spray button of the spray 1 for several seconds, the marking of the hitting point can be performed very quickly.

On the other hand, when the marking sheet 30 is damaged and the hitting point cannot be displayed on the currently exposed surface, the recovery drum 50 is turned in one direction, and the marking sheet 30 wound on the storage drum 40 is stored. While being unwound from the drum 40, it is recovered by being wound around the recovery drum 50. In this way, if only the necessary amount (damaged part) of the marking sheet 30 is recovered, the normal marking hole 31 and the surface are exposed and the next operation is possible.

1: structure,
10: spray connection,
20: spray guide cover, 21: spray nozzle holder
22: diffusion part, 23: marking sheet alignment frame part
24,25: Bracket,
30: marking sheet, 31: marking hole
40: storage drum, 50: recovery drum
60: flat roller, 70: cleaning roll,

Claims (4)

A spray connection portion 10 to which the spray is connected;
a spray guide cover 20 formed in front of the spray connection unit and preventing scattering while inducing a plurality of hitting points to be marked with the spray liquid sprayed from the spray;
Marking holes 31 are perforated at regular intervals along the longitudinal and transverse directions and placed in front of the spray induction cover, and a flexible marking sheet ( 30) and;
a storage drum 40 rotatably mounted on one side of the circumferential portion of the spray guide cover and in which the marking sheet is wound and stored;
A circumference of the spray guide cover is rotatably mounted on the opposite side of the storage drum and includes a recovery drum 50 for winding and recovering the marking sheet released from the storage drum, and when the recovery drum rotates, the recovery drum 50 Schmidt hammer quick hitting point indicator for safety inspection and diagnosis, characterized in that the storage drum rotates and the marking sheet is wound around the recovery drum while being unwound from the storage drum. The Schmidt hammer for safety inspection and diagnosis according to claim 1, comprising at least one flat member mounted between the storage drum and the recovery drum in front of the jet guide cover to help flatness of the marking sheet. Quick hit point indicator. The method according to claim 1 or claim 2, wherein the spray guide cover includes a nozzle holder part 21 covering the spray nozzle of the spray, a diffusion part 22 formed at an angle widening forward from the nozzle holder part, and a front side of the diffusion part Schmidt hammer quick hitting point indicator for safety inspection and diagnosis, characterized in that it comprises a marking sheet alignment frame portion 23 formed on the marking sheet and supporting the marking sheet at the rear of the marking sheet. The method according to claim 1 or 2, characterized in that it includes a cleaning roll (70) that is fixed to the upper part of the storage drum as well as the lower part of the spray guide cover and removes the spray liquid from the inner surface of the marking sheet wound around the storage drum. Schmidt hammer quick hit point indicator for safety checks and diagnostics.

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