A Life-Line Supproting Post System For Access Floor Construction

Abstract

In a lifeline support post for access floor construction, a lifeline (12) is connected to the top of support posts that are fixedly installed at regular intervals on a grid beam with clamps, and a connection line to a worker is connected to the lifeline to prevent safety accidents of the worker, The support post main body (1) is configured such that, in order to increase the support rigidity against loads applied to the support post through a lifeline, two support members (11) are spaced apart so that their lower ends are inserted into both sides of the grid beam in the same direction as the lifeline (12), and their upper ends are gathered and fixed in a holder (2) to form a triangular shape. This configuration allows the support members to be easily installed by fixing them at regular intervals to the grid beams of a semiconductor fab with a clamp. Additionally, the support members are connected between the support members with a turnbuckle and connected to the lifeline with a connection line to the worker, thereby preventing safety accidents involving the worker. Furthermore, the support rigidity is increased to an allowable range where the displacement of the support members does not impair the worker's safety even under impact loads caused by the worker falling.

Description

Technology Field

[0001] The present invention relates to a lifeline support post for access floor construction, and more specifically, to a lifeline support post for access floor construction with an improved structure for safely supporting a lifeline for worker safety during access floor construction in which an H-beam is installed on a grid beam, a post is fixed thereon, and a grating panel is installed on a cap at the top of the post. Background Technology

[0003] Generally, in places requiring a clean or super-clean state, such as semiconductor fabs, TFT-LCD fabs, PDP fabs, pharmaceutical or food manufacturing plants, or workshops and operating rooms for producing or assembling optical products, printing or precision machinery, fine or ultrafine dust or mist has a severe effect on product quality, so a cleanroom with a raised floor is provided to strictly isolate from the outside, maintain temperature and humidity within a specified range through constant temperature and humidity control, and prevent vibration.

[0004] The construction of such a semiconductor fab basically involves fixing multiple posts at predetermined intervals and heights on H-beams fixed on waffle slabs, and installing grating panels on top of the posts to form an access floor structure as a raised floor.

[0005] Since the construction of such access floors must be performed by a worker on a grid beam, there is a high risk of safety accidents such as falling. Therefore, posts are installed at regular intervals, and a wire is fixed between the posts. Then, the other end of a lifeline, which is connected to one end of the wire, is connected to the worker to perform the work.

[0006] As an example of such a post, Korean Registered Patent No. 10-1251051 (registration date March 29, 2013) includes: a vertical support installed vertically on a steel beam under construction; and a coupling bracket having a coupling hole for pressurizing and coupling one side of the steel beam from above, formed to be fixed to the vertical support and simultaneously maintain a state of being coupled to the steel beam. A safety guardrail for installing a steel beam is disclosed, comprising a horizontal support member installed vertically on a vertical support member, wherein the horizontal support member is provided with a connecting hole formed at one end for pressurizing the steel beam and positioned to correspond to the connecting hole, an auxiliary bracket for seating the other side of the steel beam at the other end, and a through hole for pressurizing the other side of the steel beam. The guardrail further comprises a first connecting bolt that penetrates the connecting hole and the connecting hole vertically from the top to connect the connecting bracket and the auxiliary bracket together to the steel beam, and a second connecting bolt that penetrates the through hole formed in a direction parallel to the longitudinal direction of the horizontal support member to enable the steel beam to be pressed from the side.

[0007] However, the safety handrail of the aforementioned conventional technology had a structural problem in that, in the construction of a post access floor in a cleanroom such as a semiconductor fab where posts are fixedly installed on H-beams fixed on grid beams and then grating panels are installed, it is difficult to install them stably on the grid beams, and if the spacing is wide, it is difficult to sufficiently support the load caused by the weight of workers and equipment. Prior art literature

[0009] Korean Registered Patent No. 10-1251051 (Registration Date: March 29, 2013) The problem to be solved

[0010] The objective of the present invention is to provide a lifeline support post for access floor construction with an improved structure that can be easily and stably installed on a grid beam and provides a lifeline connected to a worker with safe and sufficient support strength, in order to solve the problems regarding the structural safety of the aforementioned conventional safety handrails during access floor construction. means of solving the problem

[0012] To achieve the above-mentioned objective, the lifeline support post for access floor construction according to the present invention is configured to prevent safety accidents involving workers by connecting a lifeline to the upper ends of support posts fixedly installed at regular intervals on a grid beam with clamps, and connecting a connection line to the lifeline to the lifeline. The support post body is characterized by having a structure in which two support members are spaced apart so that their lower ends are inserted into both sides of the grid beam in the same direction as the lifeline, thereby increasing the support rigidity against loads applied to the support post through the lifeline, and their upper ends are gathered and fixed in a holder to form a triangular shape.

[0013] The above holder has a cross-section in the shape of a "U" and is fixed by fastening with bolts while the upper ends of the support members are inserted into the inside, and turnbuckles connected to one end of a lifeline are rotatably mounted on each side of the holder as pin members.

[0014] A clamp for fixing a post to a grid beam by interlocking on both sides of the grid beam comprises: horizontal members integrally joined to both sides of the spaced lower ends of the support members with a width greater than the width of the grid beam; vertical members integrally formed on the horizontal members, which extend vertically downward from each of the horizontal members and are then bent in a direction that spreads further outward; nuts integrally provided on the vertical members at vertically spaced positions, through which a bolt is installed and penetrates the nut, and a bracing member formed at the inner end of the bolt in the shape of a disc with an inner concave surface so as to be in close contact with the side of the grid beam when the bolt is fastened.

[0015] An eye lug is provided on the holder provided at the top of the above support members to support and mount a wire, and springs are mounted on both sides of the eye lugs to support and maintain the tension of the wire. Effects of the invention

[0017] The lifeline support post for access floor construction according to the present invention can be easily installed by fixing support members at regular intervals to the grid beams of a semiconductor fab with clamps, and by connecting a lifeline between the support members with a turnbuckle and connecting the lifeline to a worker with a connection line, it has the effect of preventing safety accidents of workers and the effect of increasing support rigidity so that the displacement of the support members is limited to an allowable range so as not to impair the safety of the worker even under impact loads caused by a worker falling. Brief explanation of the drawing

[0019] FIG. 1 is a schematic perspective view of a lifeline support post for access floor construction according to the present invention. FIG. 2 is an exploded perspective view of the upper part provided with a holder for supporting a turnbuckle connected to a lifeline at the top of the support post of FIG. 1. FIG. 3 is a partial enlarged view of the upper part of the support post of FIG. 2 with a turnbuckle connected to a lifeline attached. FIG. 4 is a partial enlarged view of a clamp provided at the bottom of the support post of FIG. 1 for fixing the support post to the grid beam. FIG. 5 is a perspective view of the usage state showing the support post of FIG. 1 installed on the grid beam. FIG. 6 is a front view of the upper surface of the upper part of the support post of FIG. 1, with an eye lug installed to protrude upward as a power supply line support. FIG. 7 is a front view showing a modified example in which the eye lug of FIG. 6 protrudes toward the front of the upper part of the support post. FIG. 8 is a usage diagram showing a worker working on a grid beam while connected to a lifeline after the support post of FIG. 1 is installed on the grid beam. Specific details for implementing the invention

[0020] The present invention will be described in more detail below with reference to the accompanying drawings illustrating embodiments of the present invention.

[0021] In FIGS. 1 to 4, the lifeline support post for access floor construction according to the present invention comprises a support post body (1) in which two support members (11) have their lower ends spaced apart in the same direction as the lifeline (12) and their upper ends welded to each other or fixed to a holder (2) to form a triangular shape, and a clamp (3) provided to each of the lower ends of the support post to engage with each of the two sides of a concrete grid beam.

[0022] The above support members (11) are formed as square pipes, and their lower ends are spaced apart at intervals such that they can be inserted on both sides of the width of the grid beam where the lifeline support post is to be installed, and their upper ends are gathered and fixed in the holder (2) so as to have a triangular shape in the direction of the lifeline (12), thereby increasing the support rigidity against the load applied to the support post through the lifeline, minimizing deformation of the support post, and improving safety.

[0023] As shown in FIGS. 3 and 4, the holder (2) has a cross-section in the shape of a "C" and is fixed by fastening with a bolt (21) in a state where the upper ends of the support members (11) are inserted into the inside. On each side of the holder (2), a turnbuckle (4) to which one end of a lifeline is connected is rotatably mounted by a pin member (41). The lifeline (12) is formed of a wire and allows the buckle provided at the end of the connection line connected to the worker to move smoothly, thereby facilitating the worker's work activities. The end of the lifeline (12) is fixed by being inserted into the turnbuckle with a plurality of clips.

[0024] As shown in FIG. 5, the clamp (3) is provided on each side of the two support members (11) and interlocks with both sides of the grid beam to fix the post to the grid beam. The clamp (3) is formed by welding a horizontal member (31) that is integrally joined to both sides of the spaced lower ends of the support members (11) with a width greater than the width of the grid beam, and a vertical member (32) that extends vertically downward from each of the horizontal members and is then bent in a direction that spreads further outward, and is integrated with the horizontal member by welding. A nut (33) is provided welded at least at one place on the vertical members (32), and in the illustrated embodiment, at two positions spaced vertically apart, and a bolt (34) is installed through the nut (33). A support member (35) is mounted on the inner end of the bolt, which can be formed in the shape of a disc with an inner concave shape so as to be in close contact with the side of the grid beam when the bolt is fastened.

[0025] Thus, the clamp (3) is inserted and positioned on both sides of the vertical members (32) on both sides of the grid beam, and the bolt (34) is fastened so that the supporting members (35) are firmly attached to both sides of the grid beam, and the end of the lifeline (12) wire is connected to the turnbuckle (4) of the holder (2) provided on the top of the supporting member (11) to install the lifeline support post.

[0026] As shown in FIG. 6, an eye lug (26) is mounted upward from the upper surface of the holder to support a wire (25) for supplying power to the worker's work tool.

[0027] As another example, as shown in FIG. 7, an eye lug (26) may be mounted on the side of the holder (2) so as to protrude forward.

[0028] Springs (27) are mounted on both sides of the above-mentioned eye lugs (26), and the springs (27) support the wire (26) by allowing it to pass through a circular portion formed at their ends, thereby maintaining the tension of the wire.

[0029] FIG. 8 shows an example of the use of the lifeline support posts for access floor construction according to the present invention. Two support members (11) are fixedly installed on the top of a grid beam (100) by a clamp (3), and a connection line (210), one end of which is connected to a worker (200), is movably connected to a lifeline (12) connected by a turnbuckle at a holder (2) provided on the top of the support members (11), thereby allowing the worker to safely perform access floor construction on the grid beam. The lifeline support posts of the present invention were installed at intervals of approximately 20m, and a drop test was performed by suspending a weight of 168kg in the first stage and 252kg in the second stage from the connection line (210) connected to the lifeline (12). As a result, displacements of 8mm and 14mm were observed at the top of the support member (11) of the support post, respectively, and it was determined that there was no abnormality in safety. The lifeline showed a sagging phenomenon of about 1.1m and 1.4m, and a sagging of about 60mm occurred in the fall prevention net below it, but the length of the connecting line (210) was shortened to prevent sagging of the fall prevention net below it.

[0030] Thus, it has been confirmed that the lifeline support post for access floor construction according to the present invention has the effect of preventing safety accidents of workers by connecting a lifeline between support members installed at regular intervals with clamps on the grid beams of a semiconductor fab and connecting the lifeline to a worker via a connection line, and the effect of increasing support rigidity so that the displacement of the support members is limited to an allowable range so as not to impair the worker's safety even under impact loads caused by a worker falling. Industrial applicability

[0032] The present invention relates to a lifeline support post for access floor construction, which can be used to improve support strength and improve work efficiency by safely supporting a lifeline connected for the safety of a worker working on a grid beam for the construction of an access floor in a cleanroom. Explanation of the symbols

[0034] 1: Support post main body 2: Holder 3 : Clamp 4 : Turnbuckle 11: Lack of support 12: Lifeline 25 : Wire 26 : Eye lug 31 : Horizontal member 32 : Vertical member 34 : Bolt 35 : Bracing member

Claims

Claim 1 A lifeline support post for access floor construction, wherein a lifeline (12) is connected to the upper ends of support posts fixed at regular intervals on a grid beam with clamps, and a connection line to a worker is connected to the lifeline to prevent safety accidents of the worker, wherein the support post body (1) is spaced apart from the support members (11) so that their lower ends are inserted into both sides of the grid beam in the same direction as the lifeline (12) to increase the support rigidity against the load applied to the support post through the lifeline, and their upper ends are gathered and fixed in a holder (2) and have a triangular shape, wherein the holder (2) has a cross-section in the shape of a "C" and is fixed by fastening with a bolt (21) in a state where the upper ends of the support members (11) are inserted inside, and a turnbuckle (4) to which one end of the lifeline is connected is rotatably mounted on each side of the holder (2) using a pin member (41). Claim 2 delete Claim 3 A lifeline support post for constructing an access floor, characterized in that, in claim 1, the clamp (3) for fixing the post to the grid beam by interlocking on both sides of the grid beam comprises horizontal members (31) integrally joined to both sides of the spaced lower ends of the support members (11) with a width greater than the width of the grid beam, and vertical members (32) integrally formed on the horizontal members, which extend vertically downward from each of the horizontal members and are then bent in a direction that spreads further outward, wherein a nut (33) is integrally provided on the vertical members (32) at a position spaced vertically apart, a bolt (34) is installed through the nut (33), and a support member (35) formed in the shape of a disc with an inner concave surface so as to be in close contact with the side of the grid beam when the bolt is fastened, wherein the inner end of the bolt is formed in the shape of a disc with an inner concave surface. Claim 4 A lifeline support post for access floor construction, characterized in that, in claim 1 or 3, an eye lug (26) is provided on the upper part of the support member (11) to support and mount a wire (25), and springs (27) are mounted on both sides of the eye lugs (26) to support and maintain the tension of the wire (26).

Images