KR20190049075A - Tube locking device for fire-fighting material - Google Patents

Abstract

A pipe fastening device for a firefighting material according to the present invention comprises: a pipe accommodating module having two pipe accommodating units facing each other, connecting units connecting the two pipe accommodating units at one side of the two pipe accommodating units, and rotation inducing units protruding from the two pipe accommodating units among the connecting units; and a pipe fastening module having a tunnel housing elastically fastened to the rotation inducing units while being rotated with respect to the rotation inducing units among the rotation inducing units, a pressurizing unit protruding from one end portion of the tunnel housing, and a handle unit protruding from the other end portion of the tunnel housing.

Description

TUBE LOCKING DEVICE FOR FIRE-FIGHTING MATERIAL

The present invention relates to a fire extinguishing material pipe locking device for fixing a sprinkler, which receives water for fire fighting, from a fire-fighting pipe in a fire inside a building at a predetermined position.

Recently, the Fire Prevention Law has been applied to the construction of fire prevention facilities for the purpose of protecting the lives and property of residents and / or workers from fire by preventing, bordering and suppressing fire in response to natural disasters (earthquake or volcanic activity) And to apply it actively. The seismic design standard requires installation of a sprinkler fixing tool on a brace supported by a building to minimize the movement of the sprinkler in the building due to the vibration of the fire pipe of the building during natural disaster.

In this case, the sprinkler fixing tool indirectly fixes the sprinkler to the brace by contacting the brace with the reducer located on the sprinkler. Meanwhile, the sprinkler fixing tool is disclosed in Korean Registered Utility Model No. 20-0392716 entitled " Sprinkler Reducer Mounting Apparatus " in the prior art. The sprinkler reducer mounting device comprises a fixing bracket, a reducer, and a support. The fixing bracket has two fixing plate portions which bend the central region of the rudder plate and face each other.

The reducer penetrates the two fixing plate portions, and the supporting base is positioned between the two fixing plate portions and crosses the reducer. Here, the sprinkler reducer mounting apparatus is configured to push the support through at least one wing bolt inserted in a central region of the fixing bracket, thereby bringing the support into close contact with the reducer between the two fixing plate portions. However, the use of the at least one wing bolt does not provide a uniform adhesion of the support to the reducer for each region of the support due to the annular appearance of the reducer depending on the number of bolts.

In addition, the use of the at least one wing bolt causes deformation of the initial shape of the support as the number of bolts increases, and requires an increase in the number of workings in accordance with an increase in the number of bolts, thereby deteriorating the working environment.

Korean Registered Utility Model No. 20-0392716

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems of the prior art, and it is an object of the present invention to provide an apparatus and a method for assembling a support tube, which is capable of preventing outward protrusions of a reducer by positively responding to an annular outer appearance of a reducer, It is an object of the present invention to provide a pipe locking device for a firefighting material, which is suitable for preventing deformation of an initial shape and minimizing the number of workings using a one-touch method.

The pipe locking apparatus for a firefighting material according to the present invention is characterized in that it comprises two pipe receiving parts facing each other, connecting parts connecting the two pipe receiving parts at one side of the two pipe receiving parts, A tube receiving module having rotation guiding portions protruding from the tube receiving portion; A tunnel housing rotatably supported by the rotation inducing parts between the rotation inducing parts and being elastically fixed to the rotation inducing parts, a pressing part protruding from one end of the tunnel housing, and a handle part protruding from the other end of the tunnel housing, Wherein the two pipe accommodating portions are passed through a reducer located on the flow path of the fire water in the inside of the building and fixed to the building so as to intersect with the reducer in the vicinity of the reducer, When the tunnel housing is elastically fixed to the rotation guide portions, the pressing portion elastically pushes the support pipe toward the reducer between the rotation guide portions to closely contact the support pipe with the reducer. do.

Wherein the two tube receiving portions include a receiving hole in a predetermined region of the individual tube receiving portion and a vortex plate having at least two blade pieces around the receiving hole, and the at least two blade pieces may surround the receiving hole .

The bimetallic plate may have an arcuate shape on one side edge and a straight shape on the other side edge and the two tube receiving portions may extend through the connecting portions protruding in parallel from both edges of the bimetallic plate at the other edge of the bimetallic plate .

The receiving hole of the rebound plate may have a rim that matches an annular angular appearance of the reducer for insertion of the reducer.

The at least two blade pieces may protrude from the inside of the two tube receiving portions so as to come out from the inside of the two tube receiving portions in order to prevent the outer protrusion of the reducer from coming into contact with the reducer inserted into the receiving hole.

The connecting portions may include a connecting piece and an isolated piece in an individual connecting rod, and the connecting piece and the isolated piece may extend or be formed in different directions on the rotating blade.

The connecting piece has a flat surface between the two tube receiving portions and is bent to bend from the tilting plate to impart elasticity to the tilting plate.

The isolated troughs of the individual connection blocks may extend from the other edge of the counter electrode to the reception holes between the individual connection blocks and the rotation inducing portions to impart independent movement of the rotation inducing portions to the individual connection blocks .

The rotation guide portions include guide pieces that define a hinge hole and a fixing hole in the individual rotation guide portions between the connection portions, and the guide piece has the same surface as the bimetallic plate, As shown in Fig.

The hinge hole and the fixing hole of the guide piece may be located at a higher level than the connecting portions.

The hinge hole of the guide piece may be located at a higher level than the fixing hole.

Wherein the tunnel housing includes a tunnel lock piece having a shape of 'C' so as to open toward the inside of the two pipe receiving portions when the tunnel lock is resiliently fixed to the rotation guide portions, The guide piece may be exposed from the guide piece so as to cross the opening direction of the hinge hole and the fixing hole.

Wherein the tunnel locking piece defines through holes arranged on the respective side walls at the side walls and aligned with the hinge holes of the guide pieces, the tunnel locking pieces and the guide pieces are fastened to each other through the through holes and the hinges inserted into the hinge holes As shown in Fig.

Wherein the tunnel locking piece has two separation grooves defined in respective side walls in a direction perpendicular to the thickness direction of the side walls; And a corrugation line aligned with the fixing hole of the guide piece between the two separation cores, wherein the corrugation line is inserted into the guide groove of the guide piece, And a ridge protruding toward the guide piece to be elastically fixed to the fixing hole.

When the tunnel locking piece is resiliently fixed to the guide piece, the pressing portion protrudes from the upper side of the tunnel entrance of the one side of the tunnel locking piece and surrounds the one side tunnel entrance and is bent toward the lower side of the entrance of the one side tunnel, And a free piece exposed from the lower side of the inlet, wherein the free piece can elastically vibrate between the both side walls through the lower side of the tunnel lock piece.

Wherein the free piece has a pressure cusp on a surface opposite to a surface facing the inside of the tunnel lock piece and when the tunnel lock piece is resiliently fixed to the guide piece, The support pipe can be pressed through the pressure peaks.

Wherein the handle portion includes a push piece projecting obliquely from the upper side of the tunnel entrance of the other side in the tunnel lock piece and when the tunnel lock piece is resiliently fixed to the guide piece, And to transmit the external force to the free piece.

The present invention is characterized in that the tube accommodating module has two tube receiving portions and a receiving hole and a blade piece on the backing plate in the individual tube receiving portion to sufficiently match the receiving hole and the blade piece to the annular angular outer surface of the reducer, It is possible to actively respond to the annular angular appearance of the reducer through the vortex disc to prevent relative reduction of the reducer relative to the disc.

The present invention relates to a tube-tightening module that is elastically fixed to a tube-receiving module, and includes a reducer and a support tube intersecting each other at two tube-receiving portions of the tube-receiving module, And the tip of the free part is brought into contact with the support pipe between the two tube accommodating portions. Therefore, the initial shape of the support pipe can be prevented from being deformed by focusing the tightening force of the support pipe on the angled surface of the annular angular outer surface of the reducer.

The present invention relates to a tube-receiving module, which includes a tube-tightening module that rotates with respect to a tube-receiving module, and includes two tube-receiving parts and two rotation-guiding parts that are sequentially arranged in the tube- The tunnel lock piece is rotated between the two rotation induction parts by one-touch operation so that the reducer and the support tube accommodated in the two tube accommodating portions are easily brought into close contact with each other so that the coupling operation of the reducer and the support tube It is possible to minimize the number of working hours.

1 is a front view schematically showing a pipe lock apparatus for a fire protection material according to the present invention.
2 is a side view (front view, side view and plan view) showing the tube receiving module in the tube lock for fire retardant material of FIG.
Figure 3 is a side view (front view, side view and plan view) showing the tube lock module in the tube lock for fire fighting material of Figure 1;
FIG. 4 is a perspective view partially showing the pipe lock device for fire fighting material of FIG. 1; FIG.
Figs. 5 to 7 are schematic views for explaining a method of using the pipe lock device for fire retardant material of Fig. 1. Fig.

The following detailed description of the invention refers to the accompanying drawings, which illustrate, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with one embodiment. It is also to be understood that the position or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is to be limited only by the appended claims, along with the full scope of equivalents to which such claims are entitled, if properly explained. In the drawings, like reference numerals refer to the same or similar functions throughout the several views, and length and area, thickness, and the like may be exaggerated for convenience.

Hereinafter, preferred embodiments (s) of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention .

FIG. 1 is a front view schematically showing a pipe lock device for a fire protection material according to the present invention, and FIG. 2 is a plan view (a front view, a side view, and a plan view) showing a pipe receiving module in the fire pipe lock device of FIG.

FIG. 3 is a side view (front view, side view and plan view) showing the pipe lock module in the pipe lock device for fire fighting material of FIG. 1, and FIG. 4 is a perspective view partially showing the pipe lock device for fire fighting material of FIG. 1 .

Referring to FIGS. 1 to 4, a fire extinguisher pipe locking device 290 according to the present invention includes a pipe receiving module 130 and a pipe fastening device 270. The tube receiving module 130 and the tube fastening device 270 are coupled to each other by a hinge 280 and the tube fastening device 270 is coupled to the tube receiving module 130 along the periphery of the hinge 280 And rotates in a predetermined direction (R).

First, the tube receiving module 130 has two tube receiving portions 40, connecting portions 70, and rotation inducing portions 110. The two tube receiving portions 40 are formed in the same shape and face each other and receive an external force and can elastically vibrate toward each other with respect to the connecting portions 70 or in directions farther from each other.

The two tube receiving portions 40 are provided with a receiving hole 10 in a predetermined area in the individual tube receiving portion 40 and a half wave plate 30 having at least two blade pieces 20 around the receiving hole 10 . The at least two blade pieces (20) surround the receiving hole (10). The bimetallic disc 30 has an arcuate shape on one side edge and a straight shape on the other side edge.

6) by a reducer (300 in Fig. 6) located on the flow path of the water for fire water inside the building (not shown in the figure) and fixed to the building The support tube (310 in FIG. 6) that intersects with the reducer 300 around the reducer 300 is sandwiched as shown in FIG.

To this end, the two tube receiving portions 40 extend from the other side edge of the countertop plate 30 through connecting portions 70 projecting in parallel from both corners of the countertop 30. The receiving hole 10 of the baffle plate 30 has a rim matching the annular angular appearance of the reducer 300 for inserting the reducer 300.

The at least two blade pieces 20 are in contact with the reducer 300 inserted in the receiving hole 10 to prevent the outer surface of the reducer 300 from coming in. So as to protrude from the vane disc 30. The at least two blade pieces 20 are curved to conform to the annular angular appearance of the reducer 300.

The connecting portions 70 connect the two tube receiving portions 40 at one side of the two tube receiving portions 40. More specifically, the connection portions 70 include the connection piece 50 and the isolation trough 60 in the individual connection block 70. The connecting piece 50 and the isolated trough 60 are extended or formed in different directions on the counter-rotating plate 30.

The connecting piece 50 has a flat surface between the two tube receiving portions 40 and is bent in a curved shape from the backing plate 30 to impart elasticity to the backing plate 30. That is, the connecting piece 50 protrudes from the one semi-elliptical piece 30 and contacts the other semi-elliptical piece 30 through the area between the one semi-elliptical piece 30 and the other half elliptical piece 30. The one half ellipse piece 30 and the other half ellipse piece 30 define the insertion hole 120 together with the connecting pieces 50.

The isolated troughs 60 of the individual connection blocks 70 extend from the other edge of the tilting plate 30 to the reception holes 10 between the individual connection blocks 70 and the rotation inducing portions 110, And the rotation inducing parts 110 move independently of each other. That is, the rotation inducing portions 110 may be free from the two pipe receiving portions 40 and the connecting pieces 50 through the isolation troughs 60 during elastic vibration of the two pipe receiving portions 40.

The rotation inducing portions 110 protrude from the two pipe receiving portions 40 between the connecting portions 70. More specifically, the rotation inducing parts 110 include a guide piece 100 that defines a hinge hole 80 and a fixing hole 90 in the individual rotation inducing part 110 between the connection parts 70.

The guide piece 100 has a guide groove 90G shown in FIG. 4 that is formed on the same plane as the counter-rotating plate 30 and opens toward the region between the rotation guide portions 110 on the fixing hole 90. The hinge hole 80 and the fixing hole 90 of the guide piece 100 are positioned at a higher level than the connecting portions 70.

The hinge hole 80 of the guide piece 100 is located at a higher level than the fixing hole 90. [ The tube fastening device 270 has a tunnel housing 210, a pressing portion 240, and a handle portion 260. The tunnel housing 210 is elastically fixed to the rotation inducing portions 110 while rotating about the rotation inducing portions 110 between the rotation inducing portions 110. [

The tunnel housing 210 includes a tunnel locking piece 200 having a shape of 'C' so as to open toward the inside of the two pipe receiving portions 40 when being elastically fixed to the rotation inducing portions 110. The tunnel locking piece 200 is exposed from the guide piece 100 while intersecting the opening direction of the hinge hole 80 and the fixing hole 90 of the guide piece 100 when the tunnel locking piece 200 is elastically fixed to the guide piece 100. [ do.

The tunnel locking piece 200 defines a through hole 140 which is aligned with the hinge hole 80 of the guide piece 100 on the respective side wall in both side walls. The tunnel locking piece 200 and the guide piece 100 are rotatably fixed to each other through a through hole 140 and a hinge 280 (see FIG. 1 or FIG. 4) inserted into the hinge hole 80.

The tunnel locking piece 200 is fixed on two side walls in a direction perpendicular to the thickness direction of the side wall and between two separating troughs 150 and two separating troughs 150, And a pleated line 190 that is aligned with the hole 90. The two separating troughs 150 impart independent movement of the pleat line 190 to the individual side walls of the tunnel locking piece 200.

The pleat line 190 includes a base band 160. When the tunnel locking piece 200 is rotated with respect to the guide piece 100, the tunnel locking piece 200 guides the base band 160 to the fixing hole 90 of the guide piece 100. The wrinkle binding line 90 is inserted into the guide groove 90G of the guide piece 100 and slides along the guide piece 90 from the guide groove 90G toward the fixed hole 90 so as to be elastically And a folding protrusion 170 protruding toward the guide piece 100 so as to be fixed.

The pleat protrusion 170 may be inserted into the fixing hole 90 of the guide piece 100 or separated from the fixing hole 90 when the tunnel locking piece 200 is rotated with respect to the guide piece 100. The pressing portion 240 protrudes from one end of the tunnel housing 210. More specifically, the pressing portion 240 is positioned between the both side walls of the tunnel locking piece 200.

That is, when the tunnel locking piece 200 is resiliently fixed to the guide piece 100, the pressing portion 240 protrudes from the upper side of the one-side tunnel entrance from the tunnel locking piece 200, And a free piece 230 that is bent toward the lower side of the tunnel entrance and exposed from the lower side of the entrance of one tunnel.

The free piece 230 is elastically vibrated between the both side walls through the lower side of the tunnel lock piece 200. The free piece 230 has a pressure peak 220 on a surface opposite to the surface facing the inside of the tunnel lock piece 200. 4 and 6 and 7, when the tunnel locking piece 200 is resiliently fixed to the guide piece 100, the free piece 230 is guided under the tunnel locking piece 200 to the rotation induction part 110 Through the insertion hole 120 between the base plate and the base plate.

When the tunnel locking piece 200 is resiliently fixed to the guide piece 100, the pressing portion 230 moves in the insertion hole 120 between the rotation inducing portions 110, The support pipe 310 is pressurized as shown in FIG. When the tunnel housing 210 is resiliently fixed to the rotation guide portions 110, the pressing portion 240 rotates the support pipe 310 toward the reducer 300 between the rotation guide portions 110, The support pipe 310 can be brought into close contact with the reducer 300 as shown in FIG.

More specifically, when the free piece 230 is in close contact with the support tube 310, the free piece 230 is inclined between the pressing surface CS and the pressure point 220 to form a pressing surface CS The pressure pipe 220 and the support pipe 310 can be pushed. The pushing surface CS and the pressure exertion point 220 can be seated on one angled surface in the annular angular appearance of the reducer 300 through the support tube 310.

The handle portion 260 protrudes from the other end of the tunnel housing 210. More specifically, the handle portion 260 includes a pushing piece 250 projecting obliquely from the upper side of the tunnel entrance at the other side of the tunnel locking piece 200. When the tunnel locking piece 200 is resiliently fixed to the guide piece 100, the pressing piece 250 receives external force and transmits an external force to the tunnel locking piece 200 and the free piece 230.

The pushing piece 250 is located farther away from the hinge 280 than the tunneling locking piece 200 and protrudes obliquely with respect to the tunneling locking piece 200. Therefore, when the external force is applied directly to the tunneling locking piece 200, The tunnel locking piece 200 can be elastically fixed to the guide piece 100 with a small force.

Figs. 5 to 7 are schematic views for explaining a method of using the pipe lock device for fire retardant material of Fig. 1. Fig.

5 to 7, in order to connect a sprinkler (not shown in the drawings) to a fire pipe (not shown in the figure) in a building along a fire wire, a fire pipe lock device 290, a reducer 300, And a support pipe 310 may be prepared. The pipe lock device 290 for firefighting may insert the hinge 280 into the pipe receiving module 130 and the pipe fitting module 270 to rotate the pipe fitting module 270 with respect to the pipe receiving module 130 Lt; / RTI >

When the insertion hole (120 in FIG. 2) of the tube accommodating module 130 is opened by the tube fastening module 270, the reducer 300 is inserted between the two rebound plates 30 in the tube accommodating module 130, To the receiving holes 10 formed in the first direction D1. The annular angular outer surface of the reducer 300 is inserted into the edge of the receiving hole 10 and the edge of the blade piece 20 located around the receiving hole 10 while the reducer 300 is inserted into the two vortex plates 30, Lt; / RTI >

The support tube 310 may be inserted between the two vane plates 30 in the tube receiving module 130 along the second direction D2. Here, the support tube 310 may be inserted before the reducer 300 into the two rebound plates 30. When the tube fastening module 270 is rotated in the predetermined direction R with respect to the tube receiving module 130 after the support tube 310 is inserted into the tube receiving module 130, The insertion hole 120 of the tube coupling module 270 may be closed.

The tube fastening module 270 may be provided in the tube accommodating module 130 with two guide pieces (100 in Fig. 4) to change the state of the insertion hole 120 of the tube accommodating module 130 from the open state to the closed state. (200 in Fig. 4) around the hinge 280 passing through the tunnel locking piece.

During the rotation of the tunnel locking piece 200 between the two guide pieces 100, the tunnel locking piece 200 is inserted into the guide groove 100 of the guide piece 100 The folding protrusion 170 can be elastically fixed to the fixing hole 90 of the guide piece 100 by sliding the folding protrusion 170 along the guide piece 100. [

While the tunnel locking piece 200 slides along the guide piece 100, the guide piece 100 and the folding line 190 act like a spring against each other and are pushed and pressed against each other, It is possible to insert the crease protrusion 170 into the hole 90.

130; Tube receiving module, 270; Pipe fitting module
280; Hinge, 290; Pipe lock

Claims (17)

A tube receiving portion having two tube accommodating portions facing each other and connecting portions connecting the two tube receiving portions at one side of the two tube accommodating portions and rotation inducing portions protruding from the two tube accommodating portions between the connecting portions; module; And
A tunnel housing rotatably supported by the rotation inducing parts between the rotation inducing parts and being elastically fixed to the rotation inducing parts; a pressing part protruding from one end of the tunnel housing; and a handle part protruding from the other end of the tunnel housing The branch includes a tube fastening module,
The two pipe receiving portions are sandwiched by a reducer located on the flow path of the fire water from inside the building and fixed to the building so as to sandwich a support pipe intersecting with the reducer around the reducer,
Wherein the pressing portion elastically pushes the support pipe toward the reducer between the rotation inducing portions to elastically fix the support pipe to the reducer when the tunnel housing is elastically fixed to the rotation guide portions, .
The method according to claim 1,
Wherein the two tube receiving portions include a receiving hole in a predetermined area in the individual tube receiving portion and a whitened plate having at least two blade pieces around the receiving hole,
Wherein the at least two blade pieces surround the receiving hole.
3. The method of claim 2,
Wherein the bimetallic plate has an arcuate shape on one side edge and a straight shape on the other side edge,
Wherein the two tube receiving portions extend through the connecting portions protruding in parallel from both corners of the backing plate at the other edge of the backing plate.
3. The method of claim 2,
Wherein said receiving hole of said backing plate has a rim that matches an annular angular appearance of said reducer for insertion of said reducer.
3. The method of claim 2,
Wherein the at least two blade pieces protrude from the inside of the two tube accommodating portions so as to protrude outward from the inside of the two tube accommodating portions to prevent the protrusions of the reducer from contacting the reducer inserted into the accommodating hole, Device.
The method of claim 3,
Wherein the connecting portions include a connecting piece and an isolated piece in an individual connecting rod,
Wherein the connecting piece and the isolated trough are extended or formed in different directions on the counter substrate.
The method according to claim 6,
Wherein the connecting piece has a flat surface between the two tube receiving portions and is bent to bend from the backing plate to impart elasticity to the backing plate.
The method according to claim 6,
Wherein the isolation bridges of the individual connection bridges extend between the individual connection bridges and the rotation guiding portions from the other edge of the bimetallic plate toward the receiving holes to provide independent movement of the rotation guiding portions with respect to the individual connection bridges, Tube lock.
3. The method of claim 2,
Wherein the rotation inducing portions include a guide piece that defines a hinge hole and a fixing hole in the individual rotation inducing portion between the connecting portions,
Wherein,
And a plurality of light emitting diodes (LEDs)
And a guide groove opened on the fixed hole toward an area between the rotation inducing parts.
10. The method of claim 9,
Wherein the hinge hole and the fixing hole of the guide piece are located at a higher level than the connecting portions.
10. The method of claim 9,
And the hinge hole of the guide piece is located at a higher level than the fixing hole.
10. The method of claim 9,
Wherein the tunnel housing includes a tunnel locking piece having a " C " shape so as to open toward the inside of the two tube receiving portions when the tunneling housing is elastically fixed to the rotation inducing portions,
Wherein the tunnel locking piece is exposed from the guide piece so as to intersect the opening direction of the hinge hole and the fixing hole when the guide piece is resiliently fixed to the guide piece.
13. The method of claim 12,
Wherein the tunnel lock piece defines through holes arranged on the respective side walls in both side walls and aligned with the hinge holes of the guide piece,
Wherein the tunnel locking piece and the guide piece are rotatably fixed to each other through the through hole and a hinge inserted in the hinge hole.
13. The method of claim 12,
Wherein the tunnel locking piece
Two separation grooves defined in the respective side walls in the direction perpendicular to the thickness direction of the side walls; And
And a corrugation line which is aligned with the fixing hole of the guide piece between the two separated corrugations,
Wherein the wrinkle binding line has a wrinkle protrusion which is inserted into the guide groove of the guide piece and slides along the guide piece from the guide groove toward the fixing hole and is protruded toward the guide piece so as to be elastically fixed to the fixing hole, Tube lock.
13. The method of claim 12,
When the tunnel lock piece is elastically fixed to the guide piece,
Wherein the pressing portion includes a free piece protruding from an upper side of a tunnel entrance at one side of the tunnel locking piece and being exposed from the lower side of the one tunnel entrance while being bent toward a lower side of the one tunnel entrance, ,
And the free piece is elastically vibrated between the both side walls through the lower side of the tunnel lock piece.
16. The method of claim 15,
Wherein the free piece has a pressure peak on a surface opposite to a surface facing the inside of the tunnel lock piece,
When the tunnel lock piece is elastically fixed to the guide piece,
Wherein the pressing portion presses the support pipe between the rotation inducing portions through the pressure peaks of the free piece.
13. The method of claim 12,
Wherein the handle portion includes a push piece projecting obliquely from the upper side of the tunnel entrance of the other side in the tunnel lock piece,
When the tunnel lock piece is elastically fixed to the guide piece,
Wherein the pushing piece receives external force to transmit the external force to the tunnel locking piece and the free piece.

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