KR101448682B1 - helical stair - Google Patents

Abstract

The present invention relates to spiral stairs. Bolt accommodation grooves formed on both sides of the lower surface of a stair tread are rigidly fastened by fitting bolts installed on the inner part of helical type stair stringers.

Description

{Helical stair}

In the present invention, bolt receiving grooves formed on both sides of a stair tread (stair tread / stair tread) are inserted and fixed in a bolt provided on the inside of a helical type stair stringer on both sides, It is about the stairs.

The stairs are divided into straight stairs and curved stairs.

The straight staircase is a staircase in the shape of a ladder in which the side plate is straight.

The curved staircase is divided into a spiral staircase and a helical staircase.

As a conventional spiral step, for example, one disclosed in Patent Document 1 (Korean Patent Laid-Open No. 10-2011-0101146) has been proposed.

The spiral step 1 of Patent Document 1 is a step where the spiral side plate 3 is wound along the center pole 4 and the spiral side plate 3 is only on the outside side as shown in Fig.

One end of the foot plate 2 is fixed to the pawl 4 and the other end of the foot plate 2 is fixed to the inside of the spiral side plate 3 of the outside.

The spiral side plate 3 of the outside is a structure for fastening and supporting the scaffold by fastening the screw on the outer side.

This is very simple since the outer side of the foot plate 2 is inserted into the inside of the spiral side plate 3 of the outside and then the screw is fastened inward from the outer side.

However, since the scaffold 2 is supported by the spiral side plate 3 of the outside only by means of a screw alone, the scaffold 2 is disengaged when the screw receives a large shearing force, which causes a problem of stability.

In addition, since the screw is fastened inward from the outer surface, the outer surface of the spiral side plate 3 of the outer side must be finished.

Of course, the through-hole must be drilled in the outside side spiral side plate 3 to fasten the screw.

The finishing process is to fill the through holes or to adhere the plate material of the same size as the spiral side plate of the outside.

These finishes are not only economically significant but also considerably low in productivity due to a lot of manpower and time.

On the other hand, as a conventional spiral staircase, for example, a technique disclosed in Patent Document 2 (Korean Patent No. 10-1240404) has been proposed.

As shown in FIG. 8, the conventional spiral staircase 10 is formed by spirally winding spiral side plates 20 and 30 on both sides without a central pole and is formed by a spiral side plate 20 and a spiral side plate 20 of the inside, The foot plate 50 is fixed between the first and second plates 30 and 30.

3 to 5, fitting protrusions 51 and 53 are formed on both sides of the foot plate 50. As shown in Fig.

The fitting projections 51 and 53 are formed with engagement grooves 52 and 54 to be engaged with the screw from the outside to the inside.

As shown in Fig. 3, the foot plate 50 is formed as a curved foot plate extending from the side of the inside to the side of the outside.

Fitting grooves 21 and 31 are formed on the inner side of the helical side plates 20 and 30 so that the fitting projections 51 and 53 are fitted.

Through holes (22) (32) through which the screw (40) is inserted are formed in the fitting grooves (21) (31).

The foot plate 50 is sandwiched between the spiral side plates 20 and 30 on both sides to fix and support the fitting projections 51 and 53 by fitting the fitting grooves 21 and 31 therebetween.

Of course, in order to prevent the spiral side plates 20 and 30 on both sides from being twisted, the spiral side plates 20 and 30 of the spiral side plates 20 and 30, as shown in Fig. 6, The screw 40 is inserted into the engaging grooves 52 and 54 and the helical foot 50 is further fixedly supported on the helical side plates 20 and 30.

Therefore, the fitting protrusions 51, 53 and the fitting grooves 21, 31 are stable by preventing the twisting when the shearing force of the screw 40 is minimized.

However, there is the following problem in assembling with the fitting projections 51 and 53 and the fitting grooves 21 and 31, and fastening and fixing the screw 40 inward from the outside.

The spiral side plates 20 and 30 must be opened by the fitting projections 51 and 53 in order to sandwich the scaffold 50 between the spiral side plates 20 and 30 on both sides.

For this reason, it is troublesome to perform work such as clamping so as to prevent the foot plate already inserted even if the spiral side plates 20 and 30 are opened when the foot plate 50 is fitted and fixed by sandwiching the other foot plate 50. That is, since the spiral side plates 20 and 30 must be opened and the scaffolds 50 must be inserted, it is necessary to hold the scaffold 50 that has already been inserted so as not to be pulled out.

Since the screw 40 is fastened inward from the outer surface, the outer surfaces of the through holes 21 and 31 of the spiral side plates 20 and 30 must be finished so as not to be seen from the outside.

In assembling such a conventional spiral staircase 10, an assembly for preventing the spiral side plates 20 and 30 from spreading in order to assemble and fix the stool 50 between the spiral side plates 20 and 30 while ensuring stability There is a problem that the productivity and the economical efficiency are remarkably deteriorated due to the step of performing the finishing treatment necessarily due to the fastening of the screw 40 to the inside from the outside.

As shown in Fig. 7, the through-holes 21 and 31, which are the remaining positions after the screw 40 is inserted, are filled with a neck bolt 45 like a stick or the same as the outer surface of the spiral side plates 20 and 30 Apply a thin plate of size using an adhesive or the like.

In addition, since the finishing treatment is removed and the finishing treatment is performed when maintenance or the like such as screwing or unscrewing the screw is performed, maintenance is hardly achieved.

9 is a perspective view showing a state in which hand rails 25 and 35 as handles are provided on the upper ends of the side plates 20 and 30 on both sides and a final spiral It is a staircase.

9, when the screw 40 is loosened and released again, the neck bolt 45 is taken out, the screw 40 is again tightened, the other screw thread 40 is closed, Should be.

Patent Document 1: Korean Patent Publication No. 10-2011-0101146 Patent Document 2: Korean Patent No. 10-1240404

An object of the present invention is to provide a spiral stair which is easy to assemble and assemble a scaffold, does not require a finishing process, and is excellent in maintenance management, without sparing between spiral side plates.

To achieve the above object, a spiral staircase according to claim 1 of the present invention comprises: a second spiral side plate of the outside; A second bolt fastened to the inside of the second spiral side plate; And a second bolt receiving groove in which the second bolt is received is formed on a bottom surface of the foot plate so that the second bolt is tightened under the foot plate so that the foot plate The second bolt is supported by the second helical side plate. A second support piece for supporting the other side of the foot plate is provided below the second bolt, and a second through hole is formed in the second support piece.

In the spiral step according to claim 2 of the present invention, the first spiral side plate of the inside; A first bolt fastened to the inside of the first spiral side plate; Wherein a first bolt receiving groove in which the first bolt is received is formed on a bottom surface of the foot plate so that the first bolt is tightened under the foot plate, A first pedestal is supported on the first spiral side plate and below the first bolt to support one side of the pedestal. A first through hole is formed in the first pedestal.

delete

In the helical step according to claim 4 of the present invention, the first bolt receiving groove for receiving the first bearing piece is further formed on the bottom surface of the first bolt receiving groove, A first fitting protrusion that is fitted in a first fitting groove formed in the inside of the first bolt receiving groove and a first receiving plate that is received in and supported by the first receiving groove, The second supporting plate has a second fitting protrusion that is fitted in a second fitting groove formed on the inside of the second helical side plate and a second fitting protrusion accommodated in the second fitting receiving groove, .

In the spiral staircase according to claim 5 of the present invention, a first finishing piece is provided on a bottom surface of the first supporting piece, the first finishing piece has a first magnet plate which is clogged with the inside of the first through hole, And a first finishing plate attached to a bottom surface of the first support by magnetism of a magnetic plate, a second finishing piece is provided on a bottom surface of the second support, and the second finishing piece is attached to the inside of the second through- And a second finishing plate attached to the bottom surface of the second bearing by the magnetism of the second magnet plate.

In the spiral staircase according to claim 6 of the present invention, the first bolt includes a first male screw pin to be fastened to the inside of the first helical side plate and a first bevel gear nut to be fastened to the other side of the first male screw pin Wherein the first bolt receiving groove comprises a first pin receiving groove for receiving the first male screw pin and a first nut receiving groove for receiving the first bevel gear nut, The second bolt is a second zip bolt composed of a second male screw pin fastened to the inside of the second helical side plate and a second bevel gear nut fastened to the other side of the second male screw pin And the second bolt receiving groove includes a second pin receiving groove for receiving the second male screw pin and a second nut receiving groove for receiving the second bevel gear nut.

In the helical step according to claim 7 of the present invention, the first bolt includes a first insert nut fastened to the inside of the first helical side plate, a first male screw pin fastened to the first insert nut, Wherein the first bolt receiving groove comprises a first pin receiving groove for receiving the first male screw pin and a second pin receiving groove for receiving the first male screw pin, Wherein the second bolt includes a second insert nut fastened to the inside of the second helical side plate, a second male screw pin fastened to the second insert nut, and a second insert nut fastened to the second insert nut, And a second bolt-receiving groove formed on the other side of the second male screw pin, the second bolt receiving groove having a second pin receiving groove for receiving the second male screw pin, And a second nut receiving groove in which the second bevel gear nut is received, Eojinda.

The present invention has the following effects.

Since the bolt is fastened from the inside of the spiral side plate to the bottom through the bolt receiving grooves formed on the bottom of the scaffold, it is not necessary to open the spiral side plate when inserting the foot plate, and it is necessary to drill the hole from the outside of the spiral side plate It is very easy to maintain the bolt because it is only necessary to tighten the bolt through the bolt receiving groove from the bottom even if the bolt is loose during use.

Further, a support plate is further provided inside the spiral side plate, thereby supporting the foot plate together with the bolt to further seek the stability of the foot plate.

Since the through hole is formed in the support piece, the tool for bolt can be easily inserted and removed.

Since the support receiving grooves are further formed on the inner side of the helical side plate, not only the foot plate is projected to the outside but also the foot plate is restrained except for the bottom face.

By closing the through hole with a magnet plate, the finish plate can be made to have the same pattern as the foot plate by attaching the finish plate to the magnetism of the magnet plate, and when the finish plate is pulled, the magnet plate is stuck together and dropped from the base plate, Simple.

Since the support piece is supported on the spiral side plate in a cantilever shape which once supports the fixed support plate, the support piece can be fixed to the support receiving groove stably because it is fastened and fixed to the foot plate with a screw.

Particularly, since the bolt is implemented as a zipbolt, it can be fastened with the tool from the bottom of the foot plate easily and quickly, and the nut for the bevel gear of the zip bolt can be inserted through the through hole.

1 is a perspective view schematically showing a conventional spiral step.
2 is a perspective view showing a spiral side plate on both sides in a conventional spiral staircase.
Figs. 3 to 5 are plan views showing a curved foot plate at the step of the helix of Fig. 2, and are left and right perspective views.
Fig. 6 is a partial perspective view of a spiral side plate of both sides of Fig. 2 and a curved scaffold of Fig.
FIG. 7 is a partial perspective view of the state in which the through-hole is filled with a neck bolt in FIG. 6;
8 is a perspective view simply showing a conventional spiral staircase.
Fig. 9 is a perspective view showing a final step of a spiral in which a handrail is provided on a side plate on both sides of the spiral step of Fig. 8; Fig.
10 is a perspective view showing a spiral side plate on both sides of a spiral stair according to a preferred embodiment of the present invention;
Fig. 11 is a view showing the state in which the insert nut is fastened to the spiral side plate of Fig. 10; Fig.
Fig. 12 is a view of the state in which the receiving piece is inserted in Fig. 11; Fig.
Fig. 13 is a view showing an insert nut and a support piece provided on both sides of the spiral side plate.
14 is a view showing a state in which a male screw pin is fastened to the insert nut in Fig.
Fig. 15 is a view showing an insert nut, a male screw pin, and a bearing piece provided on both sides of a spiral side plate.
FIG. 16 is a perspective view of FIG. 15 in which a footrest is inserted from top to bottom; FIG.
Fig. 17 is a bottom perspective view of Fig. 16; Fig.
FIG. 18 is a bottom perspective view of a state in which the bevel gear nut is inserted into the male screw pin in FIG. 17; FIG.
Fig. 19 is a bottom perspective view of a state in which a magnet plate is attached to a through hole of a pedestal in Fig. 18; Fig.
Fig. 20 is a bottom perspective view showing a state in which a finishing plate is attached to the bottom of the cradle in Fig. 19; Fig.
Fig. 21 is a perspective view in which a base is provided at a lower end of a spiral side plate on both sides in Fig. 20; Fig.
Fig. 22 is a perspective view of a handrail on an upper end of a spiral side plate on both sides in Fig. 21; Fig.
23 and 24 are top and bottom perspective views showing a foot plate according to a preferred embodiment of the present invention;
FIG. 25 is a perspective view showing a main wood connector for connection according to the present invention. FIG.
Fig. 26 is an internal operating state view of a nut for a bevel gear of a zip bolt in Fig. 25; Fig.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 10 is a perspective view showing a spiral side plate on both sides of a spiral step according to a preferred embodiment of the present invention, FIG. 11 is a view in which an insert nut is fastened to the spiral side plate of FIG. 10, Fig. 13 is a view in which an insert nut and a support piece are provided on both sides of a spiral side plate, Fig. 14 is a view in which a male screw pin is fastened to an insert nut in Fig. 13, 15 is a perspective view of the spiral side plate provided with inserting nuts, male thread pins and supporting pieces on the inside of both sides of the spiral side plate, FIG. 16 is a perspective view of FIG. 15 with the foot plate interposed therebetween, FIG. 17 is a bottom perspective view of FIG. 16, Fig. 18 is a bottom perspective view showing a state in which a nut for a bevel gear is inserted into a male screw pin in Fig. 17, Fig. 19 is a bottom perspective view in a state in which a magnet plate is attached to a through- In the pedestal 21 is a perspective view in which a base is provided at the lower end of the spiral side plate on both sides in FIG. 20, and FIG. 22 is a perspective view of the handrail in the upper part of the spiral side plate on both sides in FIG. 23 and 24 are top and bottom perspective views showing a footboard according to a preferred embodiment of the present invention, Fig. 25 is a perspective view showing a main wood connector for separating the present invention, Fig. 26 25 is an internal operating state view of a nut for a bevel gear of a zip bolt in Fig.

The helical step 100 according to the preferred embodiment of the present invention is configured such that the first helical side plate 110 of the inside, the second helical side plate 120 of the outside, A first bolt 130 fastened to the inside of the first helical side plate 110, a second bolt 140 fastened to the inside of the second helical side plate 120, The first bolt receiving groove 160 receives the first bolt 130 and the second bolt receiving groove 160 receives the second bolt 140. The first bolt receiving groove 160 and the second bolt receiving groove 160 are formed on both sides of the bottom surface of the foot plate 150, The second bolt receiving groove 170 is formed.

That is, since the first bolt 130 and the second bolt 140 are fastened to the inside of the first spiral side plate 110 and the second spiral side plate 120, And the outer side (outer surface) of the second helical side plate 120 is neat, so that a finishing process is unnecessary.

The foot 150 can be fixed to the first bolt 130 and the second bolt 140 through the first and second bolt receiving grooves 160 and 170 without opening the first and second helical side plates 110 and 120. [ And is tightly supported by the first and second helical side plates 110 and 120 as long as it is tightened.

It is preferable that the first bolts 130 are fastened and fixed about two in the horizontal direction.

The second bolt 140 may be fastened and fixed about two in the horizontal direction so as to correspond to the first bolt 130 in the same manner.

Accordingly, the plurality of first bolts 130 and the plurality of second bolts 140 support the two bottom sides of the foot plate 150 in a more stable manner.

When the first and second bolts 130 and 140 are not screw type, the first and second insert nuts 137 and 137 (described later) are inserted into the first helical side plate 110 and the second helical side plate 120, 147 are fastened together to form the first and second insert grooves 111, 121 to be inserted.

The first and second insert nuts 137 and 147 have a bush shape in which a female screw is formed on the inner surface and a male screw is formed on the outer surface.

One end of each of the first and second insert nuts 137 and 147 is provided with a flange and functions as a stopper which is inserted into the first and second insert grooves 111 and 121 and then caught therein.

The first and second bolts 130 and 140 may be implemented as a conventional bolt or a zipbolt (trade name) having a head portion having a tool seat surface and a shaft portion on which a male screw is formed. In this embodiment, , And two zip bolts (130) (140).

A conventional bolt has a head portion having a tool seat surface and a shaft portion having a male screw formed integrally.

The first and second zip bolts 130 and 140 have the first and second bevel gear nuts 131 and 141 and the first and second male screw pins 136 and 146 separately.

That is, the first and second bevel gear nuts 131 and 141 have first and second driven bevel gears 133a and 133b interlocked with the socket- And first and second driven bevel gears 133b and 143b engaged with the first and second driven bevel gears 133a and 143a. The first and second driven bevel gears 133b and 143b The first and second female screws 134 and 144 are formed on the rotation center shaft.

The first and second male screw threads 136a and 146a are fastened to the first and second insert nuts 137 and 147 at one end of the first and second male screw pins 136 and 146, The other male thread 136b is engaged with the first and second female threads 134 and 144 of the first and second driven bevel gears 133b and 143b at the other end of the male thread pins 136 and 146, (Not shown).

When the tool (wrench) is inserted into the first and second tool seat grooves 132 and 142 and rotated, the first and second insert nuts 131 and 141 The first and second male screw pins 136 and 146, respectively. (Operation is disclosed in Utility Model No. 20-0467577).

When the other ends of the first and second male screw pins 136 and 146 are screw type, the first and second insert nuts 137 and 147 are not required, Or may be directly fastened and fixed to the first and second spiral side plates 110 and 120 without the first and second insert grooves 111 and 121. [

On the other hand, the integral bolt is not easy to tighten or looser than a zip bolt using a wrench because the bolt is rotated or tightened by rotating the entire bolt with a wrench.

The first and second bolt receiving grooves 160 and 170 include first and second pin receiving grooves 161 and 171 for receiving the first and second male screw pins 136 and 146, And first and second nut receiving grooves 163 and 173 in which the first and second bevel gear nuts 131 and 141 are received.

The first and second pin receiving grooves 161 and 171 are passageway grooves extending inwardly from both sides of the foot plate 150.

The first and second nut receiving grooves 163 and 173 are circular grooves communicating with the first and second pin receiving grooves 161 and 171.

The first and second nut receiving grooves 163 and 173 may have diameters such that the first and second bevel gear nuts 131 and 141 move to the right and left.

The first and second support pieces 180 and 190 that support the bottom surface of the foot plate 150 are disposed below the first and second bolts 130 and 140 in the first and second spiral side plates 110 and 120 It is preferable to be further supported.

The first and second support pieces 180 and 190 serve to firmly support the foot plate 150 by dispersing the vertical load applied to the first and second bolts 130 and 140.

First and second through holes 181 and 191 are formed in the first and second support pieces 180 and 190.

The first and second through holes 181 and 191 are formed in the first and second male screw pins 136 and 146 and the first and second base plates 180 and 190, 2 serves as a passage through which the nuts 131 (141) for bevel gears and the tool can enter and exit.

The first and second bolt receiving grooves 160 and 170 are formed on the lower surface with first and second receiving grooves 165 and 175 for receiving the first and second receiving pieces 180 and 190.

The first and second support receiving grooves 165 and 175 restrict the circumference of the first and second support pieces 180 and 190 so that the foot plate 150 is prevented from being warped and cleaned without being exposed to the outside.

The first and second support pieces 180 and 190 are inserted into the first and second fitting grooves 113 and 123 formed on the inner side of the first and second spiral side plates 110 and 120, And first and second support plates 183 and 193 that are received and supported by the first and second support receiving grooves 165 and 175.

The first and second bolt receiving grooves 160 and 170 and the first and second receiving grooves 165 and 175 are vertically stacked.

First and second fastening holes 185 and 195 are formed in the first and second foot plates 183 and 193 and fastened and fixed to both sides of the foot plate 150 by the first and second screws 186 and 196. [ It serves as a passage.

Since the bottom surface of the footrest 150 is exposed by the connector for connecting wood, the structure is made such that the finish is easy to perform, but the maintenance is easy.

That is, first and second finishing pieces 210 and 230 are installed on the bottom surfaces of the first and second support pieces 180 and 190.

The first and second finishing pieces 210 and 230 have first and second magnet plates 211 and 231 attached to the inside of the first and second through holes 181 and 191, The first and second finishing plates 213 and 233 are attached to the bottom surfaces of the first and second supporting plates 183 and 193 by the magnetic force of the first and second supporting plates 231 and 231.

On the contrary, when the first and second finishing plates 213 and 233 are removed, the first and second magnet plates 211 and 231 are attached and removed, so that maintenance can be easily performed.

The first and second finishing plates 213 and 233 have the same color as the foot plate 150.

Hereinafter, a method of manufacturing the spiral stairs 100 according to the above-described configuration will be described.

First, the spirally wound first and second helical side plates 110 and 120 and the foot plate 150 are prepared.

The first and second bolt receiving grooves 160 and 170 and the first and second receiving grooves 165 and 175 are formed on the bottom surface of the foot plate 150 as shown in FIG.

The first and second helical side plates 110 and 120 are installed on the jig.

The first and second insert grooves 111 and 121 and the first and second fitting grooves 113 and 123 are formed on the inner side of the first and second helical side plates 110 and 120 installed on the jig And Fig. 13).

The first and second insert nuts 137 and 147 are fastened and inserted into the first and second insert grooves 111 and 121 (see FIGS. 11 and 13).

The first and second support pieces 180 and 190 are held in the first and second fitting grooves 113 and 123 (see FIGS. 12 and 13).

One side of the first and second male screw pins 136 and 146 is fastened to the first and second insert nuts 137 and 147 (see FIGS. 14 and 15).

The first and second bolt receiving grooves 160 and 170 of the foot plate 150 and the first and second bolt receiving grooves 160 and 170 of the foot plate 150 are attached to the first and second base plates 180 and 190 and the first and second male screw pins 136 and 146, The receiving grooves 165 and 175 are received in a top-down position (see Figs. 16 and 17).

The first and second bolt receiving nuts 131 and 141 are inserted through the first and second through holes 181 and 191 of the first and second receiving plates 183 and 193 to thereby receive the first and second bolt receiving grooves 131 and 141, (See FIG. 18) in the first and second nut receiving grooves 163 and 173 of the first and second nut 160 (170).

When the wrench is inserted into the first and second tool seat grooves 132 and 142 of the first and second bevel gear nuts 131 and 141 and then rotated, the first and second bevel gear nuts 131 and 141, Is moved toward the first and second spiral side plates 110 and 120 by the first and second other side male threads 136b and 146b.

The first and second supporting plates 183 and 193 are fastened to the foot plate 150 by the first and second screws 186 and 196 through the first and second fastening holes 185 and 195.

When the first and second magnetic plates 211 and 231 are brought into contact with the first and second through holes 181 and 191, the first and second magnetic plates 211 and 231 are blocked by the magnetic force to adhere to the first and second through holes 181 and 191 19).

Finally, when the first and second finishing plates 213 and 233 are brought into contact with the bottom surfaces of the first and second supporting plates 183 and 193, the first and second magnetic plates 211 and 231 are stuck The processing is completed (see Fig. 20).

When the finishing process is completed, the base B is installed at the lower end of the first and second spiral side plates 110 and 120 (see FIG. 21) When the handrail (HR) is installed, the spiral staircase is completed (see Fig. 22).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It will be apparent to those skilled in the art.

Detailed Description of the Invention, Claim 2 and the following Figures and Figures illustrate a double helix staircase, but may also be used in a single helix staircase (e.g., similar to a spiral staircase) as in Claim 1.

That is, the single spiral staircase has a second helical side plate 120 of the outside; A second bolt 140 fastened to the inside of the second helical side plate 120; And a second bolt receiving groove 170 receiving a second bolt 140 is formed at one side of a bottom surface of the foot plate 150, And the second bolt (140) is tightened on the bottom surface to support the foot plate (150) to the second spiral side plate (120).

One side of the foot plate 150 may be assembled as described above while the other side of the foot plate 150 is supported by a center pole or the like.

100: Spiral stairs 110,120: 1st and 2nd spiral shrouds
111, 121: first and second insert grooves 113, 123: first and second fitting grooves
130, 140: first and second bolts (zip bolts) 131, 141: first and second bevel gear nuts
132, 142: first and second tool seat recesses 133a, 143a: first and second drive bevel gears
133b, 143b: first and second driven bevel gears 134, 144: first and second female screws
136, 146: first and second male screw pins 137, 147: first and second insert nuts
136a, 146a: first and second side male threads 136b, 146b:
160, 170: first and second bolt receiving grooves 161, 171: first and second pin receiving grooves
163, 173: first and second nut receiving grooves 165, 175:
180, 190: first and second base pieces 181, 191:
182, 192: First and second fitting projections 183, 193:
185,195: first and second fastening holes 186,196: first and second screws
210,230: first and second closing pieces 211, 231: first and second magnetic plates
213,233: First and second finishing plates B: Base
HR: Handrail

Claims (7)

A second helical side plate of the outside; A second bolt fastened to the inside of the second spiral side plate; And a foot plate having a bottom surface supported by the second bolt,
A second bolt receiving groove in which the second bolt is received is formed on a bottom surface of the foot plate, the second bolt is fastened under the foot plate to support the foot on the second helical side plate,
A second support piece for supporting the other side of the foot plate is provided below the second bolt,
And a second through hole is formed in the second support piece.
The method according to claim 1,
The first spiral side plate of Inside; A first bolt fastened to the inside of the first spiral side plate; Further comprising: a foot plate having an underside supported on the first bolt,
A first bolt receiving groove in which the first bolt is received is formed on a bottom surface of the foot plate so that the first bolt is fastened under the foot plate to support the foot plate on the first helical side plate,
A first support piece for supporting one side of the foot plate is provided below the first bolt,
And a first through hole is formed in the first support piece.
delete The method of claim 2,
The first bolt receiving groove is further formed on a bottom surface thereof with a first receiving groove for receiving the first receiving piece,
Wherein the first support piece comprises a first fitting protrusion that is fitted in a first fitting groove formed on an inner side of the first helical side plate and a first support plate which is received and supported by the first support receiving groove,
The second bolt receiving groove is further formed with a second receiving groove for receiving the second receiving piece,
And the second support piece has a second fitting protrusion that is fitted in a second fitting groove formed on the inside of the second spiral side plate and a second supporting plate that is received and supported by the second fitting receiving groove.
The method of claim 4,
Wherein a first finishing piece is provided on a bottom surface of the first base,
Wherein the first finishing piece is composed of a first magnet plate adhering to the inside of the first through hole and a first finishing plate adhered to the bottom surface of the first bearing piece by the magnetism of the first magnet plate,
A second finishing piece is installed on a bottom surface of the second base,
Wherein the second finishing piece comprises a second magnet plate attached to the inside of the second through hole and a second finishing plate attached to a bottom surface of the second bearing by magnetic force of the second magnet plate.
The method according to any one of claims 2, 4, and 5,
The first bolt is a first zip bolt composed of a first male screw pin fastened to the inside of the first helical side plate and a first bevel gear nut fastened to the other side of the first male screw pin,
Wherein the first bolt receiving groove comprises a first pin receiving groove for receiving the first male screw fin and a first nut receiving groove for receiving the first bevel gear nut,
The second bolt is a second zip bolt composed of a second male screw pin fastened to the inside of the second helical side plate and a second bevel gear nut fastened to the other side of the second male screw pin,
And the second bolt receiving groove has a second pin receiving groove for receiving the second male screw fin and a second nut receiving groove for receiving the nut for the second bevel gear.
The method according to any one of claims 2, 4, and 5,
The first bolt includes a first insert nut fastened to the inside of the first spiral side plate, a first male screw pin fastened to the first insert nut, and a second male screw fastened to the other side of the first male screw fin A first zip bolt made up of a nut,
Wherein the first bolt receiving groove comprises a first pin receiving groove for receiving the first male screw fin and a first nut receiving groove for receiving the first bevel gear nut,
The second bolt includes a second insert nut fastened to the inside of the second spiral side plate, a second male screw pin fastened to the second insert nut, and a second male screw fastened to the other side of the second male screw fin A second zip bolt made of a nut,
And the second bolt receiving groove has a second pin receiving groove for receiving the second male screw fin and a second nut receiving groove for receiving the nut for the second bevel gear.

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