Spacer for cable tray

Abstract

The present invention relates to a cable tray spacer for construction that is installed to connect installation panels forming a cable tray structure, allowing a plurality of cables to be routed between the installation panels with easily adjustable routing spacing. The characteristic configuration thereof is a cable tray spacer configured to enable routing of a plurality of cables by connecting a pair of installation panels positioned facing each other, wherein a plurality of coupling holes are formed in a portion corresponding to the installation panel to which a bolt is coupled, a fitting hole is formed in the center portion of the upper surface to which a fixing pin is coupled, an insertion hole is formed in the center portion of the lower surface to which a support hole corresponding to the fitting hole is provided in the upper portion adjacent to the fitting hole and an insertion hole is formed in the lower portion to which the insertion hole communicates, a first locking hole is formed in the portion adjacent to the lower surface to which a first bolt hole is formed and a second locking hole is formed below the first locking hole to which a second bolt hole communicates, and a pair of fixing brackets are installed facing each other on the outer side of a pair of installation panels positioned facing each other, and the position is adjusted in the insertion hole A first coupling bar is installed to connect a pair of opposing fixed brackets, wherein multiple first seating holes corresponding to the insertion holes are formed at regular intervals along the upper longitudinal direction, and multiple first sliding grooves to which cable support members are coupled are formed at regular intervals along the upper longitudinal direction adjacent to the first seating holes; a second coupling bar is installed to connect a pair of opposing fixed brackets by adjusting its position at the first locking hole, wherein multiple second sliding grooves to which cable support members are coupled are formed at regular intervals along the upper longitudinal direction, and multiple first fastening holes corresponding to the first bolt holes are formed at regular intervals along the side longitudinal direction; and a third sliding groove to which cable support members are coupled is formed at regular intervals along the upper longitudinal direction, and multiple second fastening holes corresponding to the second bolt holes are formed at regular intervals along the side longitudinal direction. It includes a plurality of third connecting bars formed, andWhen the fixed bracket and the first connecting bar are connected, both ends of the first connecting bar are connected to the insertion hole in a positionally adjustable manner, and then a fixing pin connected to the fitting hole is connected to the first seating hole and the insertion hole so that the fixed bracket and the first connecting bar are firmly connected; when the fixed bracket and the second connecting bar are connected, both ends of the second connecting bar are connected to the first locking hole in a positionally adjustable manner, and then a bolt connected to the first bolt hole is connected to the first fastening hole so that the fixed bracket and the second connecting bar are firmly connected; and when the fixed bracket and the third connecting bar are connected, both ends of the third connecting bar are connected to the second locking hole in a positionally adjustable manner, and then a bolt connected to the second bolt hole is connected to the second fastening hole so that the fixed bracket and the third connecting bar are firmly connected.

Description

Technology Field

[0001] The present invention relates to a cable tray spacer for construction, and more specifically, to a cable tray spacer for construction that is installed to connect installation panels forming a cable tray structure, allowing a plurality of cables to be wired between the installation panels with easily adjustable wiring spacing. Background Technology

[0003] Various electrical appliances are used in buildings, and these appliances require electricity to operate.

[0004] Accordingly, various cables are widely wired and used to supply power to buildings, and when wiring cables is to be installed, cable trays consisting of installation panels and rung members connecting them are widely used.

[0005] The above cable tray is installed inside or outside a building to enable cable routing to various spaces within the building, and is typically installed at the bottom of the ceiling of the building as described in document (1) so that cables can be routed along the bottom of the ceiling.

[0006] However, conventional cable tray structures such as the one described in document (1) are wired in such a way that the cable is simply placed on top of a rung member installed between the installation panels, and there was a problem in that it was difficult to maintain the wired position of the wired cable securely and use it, and if the wired cable is fixed using a separate device, it was difficult for the user to conveniently adjust the wired position of the cable and use it. Prior art literature

[0009] (1) Republic of Korea registered patent number 10-1356141 (2014.01.20) The problem to be solved

[0010] The present invention has been devised to solve the aforementioned problems, and the objectives of the present invention are as follows.

[0011] first,

[0014] It enables multiple cable connections to be easily formed between installation panels without having to provide rung members that form a conventional cable tray.

[0015] Second, during the cable wiring process, the wiring position or spacing of the cables can be adjusted to enable use.

[0016] Third, through the configuration of the first wiring board and the second wiring board installed between the installation panels, stable cable wiring can be achieved corresponding to the number of cables to be wired.

[0017] Fourth, through the configuration of the coupling ring and the mounting plate, the connection of the mounting bracket, the first wiring plate, and the second wiring plate installed on the mounting panel is maintained firmly, thereby maintaining the wiring position of the wired cable firmly and enabling stable use.

[0018] Fifth, through the configuration of the fixing pin, the mounting bracket, the first wiring board, and the second wiring board can be easily connected and disconnected, and when connected, they can be prevented from separating and ensure stable use. means of solving the problem

[0020] To achieve the above objective, the present invention relates to a cable tray spacer configured to enable multiple cable wirings by connecting a pair of mounting panels positioned facing each other, wherein a plurality of coupling holes are formed in a portion corresponding to the mounting panel to which a bolt is coupled, a fitting hole is formed in a central portion of the upper surface to which a fixing pin is coupled, an insertion hole is formed in a central portion of the lower surface to which a support hole corresponding to the fitting hole is provided in an upper portion adjacent to the fitting hole and an insertion hole is formed in a portion adjacent to the lower surface to which a first locking hole is formed to which a first bolt hole is formed on one side, and a second locking hole is formed below the first locking hole to which a second bolt hole is formed and a pair of mounting brackets are installed facing each other on the outer side of a pair of mounting panels positioned facing each other, and the position of the insertion hole is adjusted to connect the pair of mounting brackets facing each other, and a plurality of first seating holes corresponding to the fitting hole are formed at regular intervals in the longitudinal direction of the upper surface. It includes a first coupling bar having multiple first sliding grooves formed at regular intervals along the upper surface length direction adjacent to the first mounting hole to which a cable support is coupled, a second coupling bar having multiple first fastening holes formed at regular intervals corresponding to the first bolt hole in the side length direction to connect a pair of opposing fixing brackets with their positions adjusted at the first locking hole, and a third coupling bar having multiple third sliding grooves formed at regular intervals along the upper surface length direction to which a cable support is coupled, and multiple second fastening holes formed at regular intervals corresponding to the second bolt hole in the side length direction to connect a pair of opposing fixing brackets with their positions adjusted at the second locking hole, and when the fixing bracket and the first coupling bar are coupled, after both ends of the first coupling bar are coupled at a position adjusted at the insertion hole,A fixing pin coupled to the above-mentioned fitting hole is coupled to the first seating hole and the insertion hole so that the fixing bracket and the first coupling bar are firmly coupled, and when the fixing bracket and the second coupling bar are coupled, both ends of the second coupling bar are coupled to the first locking hole in a positionally adjustable manner, and then a bolt coupled to the first bolt hole is coupled to the first fastening hole so that the fixing bracket and the second coupling bar are firmly coupled, and when the fixing bracket and the third coupling bar are coupled, both ends of the third coupling bar are coupled to the second locking hole in a positionally adjustable manner, and then a bolt coupled to the second bolt hole is coupled to the second fastening hole so that the fixing bracket and the third coupling bar can be firmly coupled.

[0021] At this time, a plurality of support hooks, each having a loop at the top, are connected in a positionally adjustable manner in the second sliding groove and the third sliding groove, and the support hooks are connected to a fixing device installed on the upper part of the installation panel via an elastic cord, and the fixing device may be configured with a plurality of connecting holes formed on the upper surface to which bolts are connected, and a plurality of fixing hooks connected to the elastic cord at the lower end. Effects of the invention

[0023] The present invention as described above can achieve the following effects.

[0024] First, multiple cable lines can be easily formed between the installation panels without having to provide the rung members that make up the conventional cable tray.

[0025] Second, during the cable wiring process, usage can be achieved by adjusting the wiring position or spacing of the cables.

[0026] Third, through the configuration of the first wiring board and the second wiring board installed between the installation panels, stable cable wiring can be achieved corresponding to the number of cables to be wired.

[0027] Fourth, through the configuration of the coupling ring and the mounting plate, the connection of the mounting bracket, the first wiring plate, and the second wiring plate installed on the mounting panel is firmly maintained, thereby maintaining the wiring position of the wired cable firmly and enabling stable use.

[0028] Fifth, through the configuration of the fixing pin, the installation bracket, the first wiring board, and the second wiring board can be easily connected and disconnected, and when connected, they can be prevented from being disconnected and stable use can be achieved. Brief explanation of the drawing

[0030] FIG. 1 is a perspective view illustrating the state in which the architectural cable tray spacer of the present invention is installed in a cable tray. FIG. 2 is another perspective view illustrating the state in which the architectural cable tray spacer of the present invention is installed in a cable tray. FIG. 3 is another perspective view illustrating the state in which the architectural cable tray spacer of the present invention is installed in a cable tray. FIG. 4 is a perspective view showing the state in which the electrical cable tray spacer for construction according to the present invention is installed in a cable tray. FIG. 5 is a perspective view showing a state in which a cable is wired in an electrical cable tray spacer for construction according to the present invention. FIG. 6 is an enlarged perspective view of a key part showing the state in which a coupling ring is coupled to the first connecting groove and the second connecting groove of the electrical cable tray spacer for construction according to the present invention. FIG. 7 is an enlarged excerpt of a key part illustrating a state in which a mounting plate is provided on an installation panel and an installation bracket is installed according to the present invention. Specific details for implementing the invention

[0031] Terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, but rather should be interpreted in a sense and concept consistent with the technical spirit of the invention, based on the principle that "the inventor may appropriately define the concept of a term to best describe his invention."

[0032] In addition, the embodiments described in this specification and the configurations illustrated in the drawings are merely preferred embodiments of the present invention and do not represent all technical concepts of the present invention; therefore, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application.

[0033] Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the attached drawings.

[0034] The present invention relates to a cable tray spacer configured to enable multiple cable wirings by connecting a pair of mounting panels (1) positioned facing each other, as shown in FIGS. 1 to 6. In this spacer, a plurality of coupling holes (11) to which a bolt (P) is coupled are formed in a portion corresponding to the mounting panel (1), a fitting hole (12) to which a fixing pin (12a) is coupled is formed in the center portion of the upper surface, an insertion hole (13) communicating with the fitting hole (12) is formed in the center portion of the lower surface, a support hole (13a) corresponding to the fitting hole (12) is provided in the upper portion adjacent to the fitting hole (12), and a first locking hole (14) communicating with a first bolt hole (14a) formed on one side is formed in the portion adjacent to the lower surface, and a second locking hole (15) communicating with a second bolt hole (15a) is formed below the first locking hole (14). A pair of fixing brackets (10) are installed facing each other on the outer side of a pair of installation panels (1), and a first connecting bar (20) is installed so that the position of the insertion hole (13) is adjusted to connect the facing pair of fixing brackets (10), and in the upper surface length direction, a plurality of first seating holes (21) corresponding to the fitting hole (12) are formed at regular intervals, and in the upper surface length direction adjacent to the first seating hole (21), a plurality of first sliding grooves (22) to which a cable support member (51) is coupled are formed at regular intervals, and a second sliding groove (31) to which a cable support member (51) is coupled is formed at regular intervals in the upper surface length direction, and in the side length direction, a first connecting bar (20) is installed so that the position of the first locking hole (14) is adjusted to connect the facing pair of fixing brackets (10), and in the upper surface length direction, a plurality of second sliding grooves (31) to which a cable support member (51) is coupled are formed at regular intervals, and in the side length direction, a corresponding to the first bolt hole (14a) A second connecting bar (30) is formed with multiple first connecting holes (32) spaced at regular intervals, and a pair of fixing brackets (10) facing each other are installed to be connected by adjusting their positions in the second locking holes (15), and a third sliding groove (41) is formed with multiple spaced intervals in the upper surface length direction to which a cable support member (51) is connected.In the lateral longitudinal direction, a third connecting bar (40) is included in which a plurality of second fastening holes (42) corresponding to the second bolt holes (15a) are formed at regular intervals, and when the fixing bracket (10) and the first connecting bar (20) are connected, both ends of the first connecting bar (20) are connected to the insertion hole (13) in a positionally adjustable manner, and then a fixing pin (12a) connected to the fitting hole (12) is connected to the first seating hole (21) and the insertion hole (13) so that the fixing bracket (10) and the first connecting bar (20) are firmly connected, and when the fixing bracket (10) and the second connecting bar (30) are connected, both ends of the second connecting bar (30) are connected to the first locking hole (14) in a positionally adjustable manner, and then a bolt (P) connected to the first bolt hole (14a) is connected to the first fastening hole (32). The fixed bracket (10) and the second connecting bar (30) are firmly connected, and when the fixed bracket (10) and the third connecting bar (40) are connected, both ends of the third connecting bar (40) are connected to the second locking hole (15) in a positionally adjustable manner, and then a bolt (P) connected to the second bolt hole (15a) is connected to the second fastening hole (42) so that the fixed bracket (10) and the third connecting bar (40) are firmly connected.

[0035] The above-mentioned fixed bracket (10) is configured to be installed on each of a pair of mounting panels (1) positioned facing each other, so that the first coupling bar (20), second coupling bar (30), and third coupling bar (40), which will be described in detail below, can be installed. It is formed in the shape of an elongated bar and is installed such that its length direction is perpendicular to the mounting panel (1).

[0036] In addition, the above-described fixing bracket (10) is configured to have a plurality of coupling holes (11) into which a bolt (P) is coupled, and is securely installed on the installation panel (1) through the bolt (P) coupled to the coupling holes (11), and a fitting hole (12) into which a fixing pin (12a) is coupled is formed in the center of the upper surface so that the fixing pin (12a) can be coupled to the fitting hole (12).

[0037] Additionally, the fixed bracket (10) is configured such that a support hole (13a) corresponding to the fitting hole (12) is provided at the center of the lower surface adjacent to the fitting hole (12), and an insertion hole (13) communicating with the fitting hole (12) is formed.

[0038] In this configuration, the first connecting bar (20) is connected to the insertion hole (13). It is configured to be such that when the fixing pin (12a) is connected to the insertion hole (12), the fixing pin (12) passes through the insertion hole (12) and is connected to the first seating hole (21) of the first connecting bar (20), and then the fixing pin (12) is configured to be connected to the support hole (13a).

[0039] This means that when the first coupling bar (20) is coupled to the insertion hole (13), the fixing pin (12a) coupled to the fitting hole (12) is configured to be coupled to the first seating hole (21) of the first coupling bar (20), thereby allowing the installation position of the first coupling bar (20) coupled to the insertion hole (13) of the fixing bracket (10) to be firmly maintained.

[0040] In addition, the fixed bracket (10) is configured such that a first locking hole (14) is formed in communication with a first bolt hole (14a) formed on one side adjacent to the bottom surface, so that a second connecting bar (30), which will be described in detail below, can be installed in the first locking hole (14), and a second locking hole (15), which will be described in detail below, is formed in communication with a second bolt hole (15a) formed on one side surface below the first locking hole (14), so that a third connecting bar (40), which will be described in detail below, can be installed in the second locking hole (15).

[0041] As described above, when the above-mentioned fixed bracket (10) is installed on a pair of installation panels (1) positioned facing each other, the first connecting bar (20), the second connecting bar (30), and the third connecting bar (40), which are described in detail below, can be installed to connect the pair of fixed brackets (10) positioned facing each other.

[0042] In addition, the first connecting bar (20) is configured in the shape of an elongated bar and is connected to the insertion hole (13) of the fixing bracket (10) so as to be positioned as described above.

[0043] In addition, the first coupling bar (20) is formed with a plurality of first seating holes (21) corresponding to the fitting hole (12) in the upper longitudinal direction at regular intervals, and as shown in FIGS. 3 to 6, a fixing pin (12a) coupled to the fitting hole (12) is coupled to the first seating hole (21) to firmly maintain the installation position of the first coupling bar (20) coupled to the insertion hole (13). The user can adjust the installation position of the first coupling bar (20) coupled to the insertion hole (13) according to their choice, and then use the first coupling bar (20) while firmly maintaining its installation position through the fixing pin (12a).

[0044] Additionally, the first connecting bar (20) is configured such that a plurality of first sliding grooves (22) are formed at regular intervals along the length of the upper surface adjacent to the first seating hole (21), and a cable support member (51) capable of supporting the lower part of a cable (2) being wired is detachably connected to the first sliding groove (22).

[0045] The above configuration allows for the installation of a pair of fixed brackets (10) installed on the installation panel (1) by adjusting the installation position of the first connecting bar (20), and then connecting a plurality of cable support members (51) to the first sliding groove (22) of the first connecting bar (20) to form a plurality of cables (2) to form wiring as shown in FIG. 6, and is configured to allow for convenient adjustment of the wiring position of the cables (2) to be wired and to be installed.

[0046] In addition, as shown in FIGS. 1 to 6, the second connecting bar (30) is installed so as to be positioned in the first locking hole (14) and is configured in the shape of a long bar.

[0047] In addition, the second connecting bar (30) is configured such that a plurality of second sliding grooves (31) are formed at regular intervals along the upper length direction, allowing the cable support member (51) to be connected to the second sliding grooves (31), and a plurality of first fastening holes (32) corresponding to the first bolt hole (14a) are formed at regular intervals along the side length direction.

[0048] In this configuration, when a second connecting bar (30) is installed in the first locking hole (14) of a fixing bracket (10) to connect a pair of fixing brackets (10) installed on the installation panel (1), the user adjusts the installation position of the second connecting bar (30), and then the bolt (P) connected to the first fastening hole (32) is connected to the first bolt hole (14a), so that the second connecting bar (30) can be firmly installed on a pair of fixing brackets (10) with adjustable position as shown in FIGS. 4 to 6.

[0049] In addition, after the above combination is formed, a plurality of cable support members (51) are connected to the second sliding groove (31), and the cable (2) is configured to be wired so that the wiring position is adjusted and wired to the upper part of the second connecting bar (30).

[0050] And as shown in FIGS. 1 to 6, the third connecting bar (40) is installed to connect a pair of facing fixing brackets (10) by adjusting the position of the second locking hole (15), and in the upper longitudinal direction, a plurality of third sliding grooves (41) to which a cable support member (51) is connected are formed at regular intervals, and in the side longitudinal direction, a plurality of second fastening holes (42) corresponding to the second bolt hole (15a) are formed at regular intervals.

[0051] To explain the above configuration in detail, the third connecting bar (40) is positioned and installed in the second locking hole (15) of the fixed bracket (10), and then a bolt (P) connected to the second fastening hole (42) is connected to the second bolt hole (15a), so that the third connecting bar (40) is positioned below the second connecting bar (30) as shown in FIGS. 4 to 6, and a pair of fixed brackets (10) are connected so that the third connecting bar (40) is positioned facing each other. After such installation is completed, a plurality of cable support members (51) are connected to the third sliding groove (41) of the third connecting bar (40), so that a plurality of cables (2) can be wired to the upper part of the third connecting bar (40).

[0052] In addition, as shown in FIGS. 1 to 6, a plurality of support rings (52) having a ring (52a) at the top are connected in a positionally adjustable manner in the second sliding groove (31) and the third sliding groove (41), and the support rings (52) are connected to a fixing member (60) installed on the upper part of the installation panel (1) and an elastic cord (70), and the fixing member (60) is configured such that a plurality of connecting holes (61) to which a bolt (P) is connected are formed on the upper surface, and a plurality of fixing rings (62) connected to the elastic cord (70) are provided on the lower end.

[0053] The above configuration is configured such that when the second coupling bar (30) and the third coupling bar (40) are installed on a pair of fixing brackets (10) installed on the installation panel (1) as shown in FIGS. 5 and 6, a plurality of supporting rings (52) having a ring (52a) at the top are connected to the second sliding groove (31) of the second coupling bar (20) and the third sliding groove (41) of the third coupling bar (40), and the fixing ring (62) of the fixing member (60) installed on the upper part of the installation panel (1) and the ring (52a) of the supporting ring (52) are connected by an elastic cord (70) so that the installation position of the second coupling bar (30) and the third coupling bar (40) can be maintained more firmly and used.

[0054] In addition, the user can adjust the installation position of the support hook (52) coupled to the second sliding groove (31) and the third sliding groove (41) and the fixing member (60) installed on the installation panel (1), thereby enabling the installation position of the second coupling bar (30) and the third coupling bar (40) to be maintained more securely and used.

[0055] Although the present invention has been illustrated and described in relation to specific embodiments, it will be obvious to those skilled in the art that the present invention can be variously modified and changed without departing from the gist or scope of the invention as provided by the following claims. Explanation of the symbols

[0057] 1: Installation panel 2: Cable 10: Fixing bracket 11: Connecting hole 12: Insert ball 12a: Fixing pin 13: Insertion hole 14: First Stumbling Hole 14a: 1st bolt hole 15: Second Stumbling Block 15a: Second bolt hole 20: First connecting bar 21: 1st landing 22: 1st Sliding Home 30: Second connecting bar 31: Second sliding home 32: First fastening hole 40: Third connecting bar 41: 3rd sliding home 42: Second fastening hole 51: Cable support section 52: Jjigigori 52a: ring 60: Fixing device 61: Connecting hole 62: Fixing ring 70: Elastic cord P: Bolt

Claims

Claim 1 A cable tray spacer configured to enable multiple cable wirings by connecting a pair of mounting panels (1) positioned facing each other, wherein a plurality of coupling holes (11) into which a bolt (P) is coupled are formed in a portion corresponding to the mounting panel (1), a fitting hole (12) into which a fixing pin (12a) is coupled is formed in the center portion of the upper surface, and an insertion hole (13) communicating with the fitting hole (12) is formed in the center portion of the lower surface, with a support hole (13a) corresponding to the fitting hole (12) provided in the upper portion adjacent to the fitting hole (12), and a first locking hole (14) communicating with a first bolt hole (14a) formed on one side is formed in the portion adjacent to the lower surface, and a second locking hole (15) communicating with a second bolt hole (15a) is formed below the first locking hole (14), so as to be positioned facing each other on the outer side of a pair of mounting panels (1). A pair of fixed brackets (10) are installed to connect the pair of fixed brackets (10) facing each other, with their positions adjusted in the insertion hole (13). In the upper longitudinal direction, a plurality of first seating holes (21) corresponding to the fitting hole (12) are formed at regular intervals, and in the upper longitudinal direction adjacent to the first seating hole (21), a plurality of first sliding grooves (22) to which a cable support member (51) is coupled are formed at regular intervals. A first connecting bar (20) is installed to connect the pair of fixed brackets (10) facing each other, with their positions adjusted in the first locking hole (14). In the upper longitudinal direction, a plurality of second sliding grooves (31) to which a cable support member (51) is coupled are formed at regular intervals, and in the side longitudinal direction, a plurality of first fastening holes (32) corresponding to the first bolt hole (14a) are formed at regular intervals. A second connecting bar (30) and a pair of fixing brackets (10) facing each other are installed to be connected by adjusting the position of the second locking hole (15), and a plurality of third sliding grooves (41) to which a cable support member (51) is connected are formed at regular intervals in the upper surface length direction.In the lateral longitudinal direction, a third connecting bar (40) is included in which a plurality of second fastening holes (42) corresponding to the second bolt hole (15a) are formed at regular intervals, and when the fixing bracket (10) and the first connecting bar (20) are connected, both ends of the first connecting bar (20) are connected to the insertion hole (13) in a positionally adjustable manner, and then a fixing pin (12a) connected to the fitting hole (12) is connected to the first seating hole (21) and the insertion hole (13) so that the fixing bracket (10) and the first connecting bar (20) are firmly connected, and when the fixing bracket (10) and the second connecting bar (30) are connected, both ends of the second connecting bar (30) are connected to the first locking hole (14) in a positionally adjustable manner, and then a bolt (P) connected to the first bolt hole (14a) is connected to the first fastening hole (32). A cable tray spacer for construction, characterized in that the fixed bracket (10) and the second connecting bar (30) are firmly connected, and when the fixed bracket (10) and the third connecting bar (40) are connected, both ends of the third connecting bar (40) are connected to the second locking hole (15) in a positionally adjustable manner, and then a bolt (P) connected to the second bolt hole (15a) is connected to the second fastening hole (42) so that the fixed bracket (10) and the third connecting bar (40) are firmly connected. Claim 2 A cable tray spacer for construction, characterized in that, in the first paragraph, a plurality of support rings (52) having a ring (52a) at the top are connected in a positionally adjustable manner in the second sliding groove (31) and the third sliding groove (41), the support rings (52) are connected to a fixing member (60) installed on the upper part of the installation panel (1) by an elastic cord (70), and the fixing member (60) is configured such that a plurality of connecting holes (61) to which a bolt (P) is connected are formed on the upper surface, and a plurality of fixing rings (62) connected to the elastic cord (70) are provided on the lower surface.

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