KR101751184B1 - Rail deck - Google Patents

Abstract

The present invention relates to a rail deck capable of preventing the deck plate from being moved forward and rear by firmly connecting the deck plates and preventing the deck plate from moving to the left and right, A rail deck comprising two or more joists constituting each of a plurality of joists or cores arranged side by side in a back and forth direction, wherein the joists are sequentially raised from the rear to the front over the joists, A plurality of deck plates formed at the front of each of the lower portions and having front mounting depressed dents opened front and lower and rear mounting recesses having rear and lower openings at the rear of each lower portion; The front deck is inserted into the front mounting depression of the deck plate, the rear of which is located at the rear in the left and right direction, And a vertical plate is formed on an upper portion of the lower fixing portion. The upper portion of the vertical plate is protruded rearward and forward to be positioned rearward and forward, and the horizontal groove portion of the deck plate, And a plurality of rail-shaped connecting members on which an upper fixing portion is inserted.

Description

Rail Deck {RAIL DECK}

[0001] The present invention relates to a rail deck, and more particularly, to a rail deck capable of preventing a deck plate from being moved forward and backward by firmly connecting the deck plates, .

In recent years, deck floors and deck rods have been widely used for flooring of wooden deck boards and synthetic wood deck boards for the hiking trails, lakes, walkways, and the perimeter floors of buildings with social boom. And the synthetic wood deck plate absorbs shocks and vibrations efficiently, gives a visually smooth and comfortable feeling, and has excellent durability, which makes it easy to maintain.

Fig. 8 shows a conventional deck rod. Fig. 8A is a partially exploded perspective view, and Fig. 8B is a cross-sectional view.

As shown in FIG. 8, a conventional deck rod is composed of a joist line 100 composed of two or more pieces or pieces of an elongated body extending in the front-rear direction with a gap therebetween; A horizontal groove 201 is formed in the front and rear end faces of the string 100 and a plurality of long deck plates 200 on both sides of which the inclined groove 202 is formed in the lower portion of the front and rear cross- 200); And a plurality of connection clips 300 connecting between the deck plates 200 mounted on top of the respective joists 100 between the deck plates 200.

The connecting clip 300 has a width equal to the width of both sides of the joining line 100 at the front and rear and is formed at a lower portion of the connection end of the two deck plates 200, A horizontal portion 201 formed at the middle of the connection ends of the two deck plates 200 connected to each other so as to protrude forward and rearward from the upper portion of the vertical portion 301, And a through hole 303 through which a fixing screw 304 vertically formed at the center and fastened to the joist line 100 passes.

A spacing gap (400) is formed between the two deck plates (200) connected to each other to block the fixing screw (304) from top to bottom.

However, the conventional deck load configured as described above has the following problems.

First, when the deck rod is used for a long period of time, the conventional deck rods are partially connected to each other at left and right intervals by connecting the two deck plates connected to each other, There is a problem in that the gap between the upper and lower surfaces is depressed.

In addition, since the conventional deck rod is screwed into the gap between the two deck plates connected to each other, when the deck rod is used for a long period of time, the screw is pushed upward and the connecting clip flows upward, There was also a problem that deck plates flowed as a whole.

In addition, since the conventional deck rods are formed in a flat plate shape in which the front and rear horizontal flat plates formed on the front and rear sides of the connecting clip are flat, when one deck plate is moved forward and backward, The horizontal plate is separated from the horizontal grooves of the respective deck plates, so that when one deck plate flows, the entire deck plates gradually flow.

"Deck Rod Structure Using Filled Tube" of Korea Patent No. 1366337 (Feb.

Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art,

It is an object of the present invention to provide a deck plate which is formed by connecting two deck plates connected to each other through a rail type connecting member which is formed long in the left and right direction and fixed to all the joists, And a rail type connecting member which is used as a deck floor and a deck rod for preventing a gap between the lower deck and the lower deck from being lowered.

It is another object of the present invention to provide a rail deck capable of preventing the screws from being pulled out to the upper portion after the installation of the rail deck by pushing the upper portion of the screw fastened to the joist line and fixing the rail- have.

Another object of the present invention is to provide a rail-type connecting member in which the rail-shaped connecting member is provided with a plurality of lower- Rail decks.

It is another object of the present invention to provide a rail-type connecting member in which a plurality of wedge-shaped protrusions are formed at the upper and lower portions of the front and rear portions of the upper fixing portion constituting the rail-type connecting member so as to further prevent the deck plate from being separated from the rail- Rail decks.

It is another object of the present invention to provide a rail type connecting member which is provided with a right and left flow preventing means on a vertical plate so that it can be prevented from being moved both forward and backward, Rail deck.

According to an aspect of the present invention, there is provided a rail deck comprising two or more joists constituted by corners or corners arranged side by side in a back and forth direction with a space therebetween, And a horizontal groove portion is formed in the middle of each of the front and rear end portions. A front mounting depression groove is formed in front of each of the lower portions, A plurality of deck plates formed at the rear of the rear deck plate, The front deck is inserted into the front mounting depression of the deck plate, the rear of which is located at the rear in the left and right direction, And a vertical plate is formed on an upper portion of the lower fixing portion. The upper portion of the vertical plate is protruded rearward and forward to be positioned rearward and forward, and the horizontal groove portion of the deck plate, And a plurality of rail-shaped connecting members on which an upper fixing portion is inserted.

Further, the rear mounting depression of the "rail deck" according to the present invention includes a horizontal surface at its upper portion, the front mounting depression includes a horizontal surface at its upper portion, And a rear vertical protrusion protruding forwardly and closely contacting the upper surface of the horizontal surface of the rear mounting depression, and a lower portion of the lower rear protrusion protruding forwardly from the upper surface of the rear mounting depression, And a lower front projection which is provided with a front vertical supporting bar which is in contact with the upper surface of the joists and which is fixed to the joist at the front.

Further, the joist fixing means of the "rail deck" according to the present invention includes: a front protruding fixing plate formed to protrude forward from the front lower portion of the front vertical supporting bar of the lower front protruding plate and formed in a plurality of joining holes, And a screw, which is passed through from above to the lower fixing hole of the upper fixing hole and whose head part is located at the upper part of the lower front pressing head, and which is fastened to each fixing line.

Further, the upper part of the head of the screw of the "rail deck" according to the present invention is in close contact with the horizontal surface of the rear mounting depression.

Further, a plurality of lower wedge-shaped protrusions are formed on the lower surface of the front projecting and fixing plate of the " rail deck "according to the present invention and on the lower surface of the front vertical reinforcing plate at intervals in the longitudinal direction of the rail- .

The upper fixing portion of the "rail deck" according to the present invention includes an upper rear projection which is inserted into a horizontal groove of a front end portion of a deck plate projecting rearward and located at the rear, And an upper front projection which is inserted into the horizontal groove of the rear end portion of the upper rear projection, wherein upper and lower front projection projections are provided at the upper and lower portions in the longitudinal direction of the rail- And a plurality of upper front wedge-shaped protrusions are formed at the upper and lower portions of the upper front projection so as to be spaced apart from each other in the lengthwise direction of the rail-shaped connecting member, Is further formed.

Further, the lower wedge-shaped protrusion and the upper rear wedge-shaped protrusion of the " rail deck "according to the present invention are formed to be inclined rearward so as to prevent the rail-shaped connecting member from being detached forwardly, The front wedge-shaped protrusion is formed to be inclined forward so as to prevent the front deck plate from being detached forward, and the front wedge-shaped protrusion is pointed forward.

Further, in the " rail deck "according to the present invention, one or more left and right flow prevention holes are formed in the vertical plate to the rail-shaped connecting member, and at the front end or the rear end of the deck plate, And a left and right flow prevention pin inserted and fastened or inserted.

Further, in the "rail deck" according to the present invention, the vertical plate of the rail-type connecting member is further formed with one or more left and right flow prevention wedges having protruding ends projecting forward or backward by punching.

Further, in the "rail deck" according to the present invention, the vertical plate to the rail-type connecting member is further provided with a plurality of left and right flow preventing wedges having protruding ends protruding forward and rearward.

In the present invention constructed as described above, two deck plates connected to each other are integrally connected to each other through a rail-type connecting member which is formed long in the left-right direction and fixed to all of the joists. Thus, even if the rail deck is used for a long period of time, There is an effect of preventing the interval between the joist lines of the lower portion from being lowered.

Further, according to the present invention, it is possible to prevent the screw deck from being pulled out after the installation of the rail deck by pushing the upper part of the screw fastened to the joist line and fixing the rail-type connecting member, There is also an effect of preventing the member from flowing in the vertical direction.

The present invention also has the effect of preventing the rail type connecting member from slipping back and forth from the joist line by forming a plurality of lower wedge-shaped protrusions that are formed on the upper side of the joists in the front lower part of the rail type connecting member.

The present invention also has the effect of further preventing the deck plate from being detached from the rail-shaped connecting member by forming a plurality of wedge-shaped protrusions on the upper and lower portions of the front and rear of the upper fixing portion constituting the rail-type connecting member.

The present invention also has the effect of preventing the front and rear sides of the deck plate, which are connected to the front and rear sides, as well as the left and right sides, by providing the right and left flow preventing means on the vertical plate of the rail type connecting member.

1 is an exploded perspective view showing a rail deck according to the present invention.
2 is a perspective view showing a rail deck according to the present invention.
3 is a sectional view taken along the line AA in Fig. 2
4 is an enlarged view of a portion B in Fig.
FIG. 5 shows a rail-type connecting member constituting the present invention,
5A is a perspective view,
5B is a side enlarged view.
6 shows a state in which the left and right flow preventing means constituting the present invention is provided,
6A is a schematic exploded perspective view,
6B is a sectional view.
FIG. 7 shows a state in which the left and right flow prevention means of another embodiment of the present invention is provided.
7A is a schematic exploded perspective view,
7B is a sectional view.
Figure 8 shows a conventional deck load,
8A is a partially exploded perspective view,
8B is a sectional view.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the invention can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

2 is a perspective view showing a rail deck according to the present invention, FIG. 3 is a sectional view taken along the line AA in FIG. 2, and FIG. 4 is an enlarged view to be. 5 shows a rail-type connecting member constituting the present invention, wherein FIG. 5A is a perspective view and FIG. 5B is a side enlarged view. FIG. 6 shows a state in which the left and right flow preventing means constituting the present invention is provided. FIG. 6A is a schematic exploded perspective view and FIG. 6B is a sectional view.

As shown in the drawings, the rail deck according to the present invention includes two or more joists 1 arranged side by side in the front-rear direction with a gap therebetween. The rail deck according to the present invention comprises a plurality of deck plates 2 which are sequentially raised from the rear to the front in the upper part of the joists 1 and a deck plate 2 which is sequentially raised from the rear to the upper part of the joists 1, A plurality of rail-shaped connections 2 which are arranged in a long left-to-right direction on a plurality of joist lines 1 arranged in parallel with each other between two deck plates 2 connected to each other and connecting the deck plates 2 to each other, And a member (3).

The rail deck according to the present invention can be used as a deck rod as well as a deck floor, and will be referred to as a rail deck when the deck plates 2 are connected to a plurality of rail-shaped connecting members 3.

In addition, the joist line 1 may be formed of a metal pipe or a wooden pipe. In the drawings, the pipes are made of metal.

As shown in Figs. 1 to 4, the deck plate 2 constituting the present invention functions as a bottom plate, which is sequentially raised from the rear to the top of the joists 1.

The deck plate 2 serving as the above-mentioned deck plate 2 is formed with horizontal grooves 21 on both sides in the middle of the front and rear ends of the deck plate 2, and forward mount recesses 22 are formed on the lower portion of the lower portion of the lower portion and rear mounting recess 23 is formed in the rear portion of each lower portion.

A horizontal plane 231 is formed on the upper part of the rear mounting recess 23 and a horizontal plane 221 is formed on the upper part of the front mounting recess 22.

1 to 5, the rail-type connecting member 3 constituting the present invention is constructed such that, among the deck plates 2 that are sequentially raised from the rear to the top of the joist lines 1, A plurality of long strings 1 are arranged in parallel to each other between the two deck plates 2 connected to each other to connect the deck plates 2 to each other.

The rail-shaped connecting member 3 having such a function is inserted into the front mounting recessed groove 22 of the deck plate 2 rearwardly positioned at the lower portion thereof and fixed forwardly to the longitudinal line 1, The lower fixing portion 31 is inserted into the rear mounting recess 23 of the deck plate 2. The vertical plate 33 is formed on the upper part of the lower fixing part 31 and the horizontal groove part of the deck plate 2 protruding rearward and forward from the upper part of the vertical plate 33, The upper fixing part 34 inserted into the upper fixing part 34 is formed.

The lower fixing part 31 is protruded rearward so as to firmly connect the lower part of the two deck plates 2 so that the upper surface is in close contact with the horizontal surface 221 of the front mounting recess 22, A lower rear protrusion 311 protruding from the rear mounting recess 23 to form a rear vertical vertical reinforcement band 312 which is in close contact with the upper surface of the joist lines 1, And a lower front protrusion 313 having a front vertical supporting bar 314 which is in close contact with the upper surface of the joist lines 1 and a joist fixing means 315 which is fixed to the joist line 1 at the front, ).

The joist line fixing means 315 may be provided so as to protrude forward from the front lower portion of the vertical reinforcing bar 314 of the lower front projection 313 so as to firmly fix the rail type connecting member 3 to the joist line 1 A front projecting and fixing plate 316 having a screw setting groove 316a formed in the upper surface in the left and right direction and a lower front projection 313 penetrating through the lower front projection 313 in each of the screw setting grooves 316a, And a screw 317 located on the upper portion of the lower front projection 313 and fastened to each of the longitudinals 1.

The screw setting groove portion 316a is formed such that when the screw 317 is pierced through the upper surface of the forward projecting fixing plate 316, the lower portion of the screw shaft constituting the screw 317 is projected to the front projecting and fixing plate 316, And is formed long on the upper surface of the front projecting and fixing plate 316 so as to prevent slippage on the upper surface of the front protrusion fixing plate 316. It is most preferable that the screw setting groove portion 316a is formed as a V-shaped groove.

The screw 317 has a screw groove 317 in which a driver groove for inserting a screwdriver is formed in an upper portion of the head and a drill is formed in a lower portion of the screw shaft, Is most preferably used.

It is most preferable that the upper portion of the head of the screw 317 is in close contact with the horizontal surface 231 of the rear mount recess 23 so as to prevent the screw 317 from being unwound after being fastened. Accordingly, the present invention pushes the upper part of the screw 317 fastened to the joist line 1 through the horizontal plane 231 of the rear mounting recess 23, so that after the installation of the rail deck, It is advantageous to prevent the rail-shaped connecting member 3 from flowing in the vertical direction even if the rail deck is used for a long period of time.

The rail-shaped connecting member 3 is provided on the lower surface of the front projecting fixing plate 316 and on the lower surface of the front vertical supporting bar 314 so as to prevent the rail-shaped connecting member 3 from slipping back and forth in the joist line 1, A plurality of lower wedge-shaped protrusions 32 are preferably formed on the upper surface of the joist line 1 at an interval in the longitudinal direction of the lower wedge-shaped protrusions 3.

The upper fixing portion 34 is inserted into the horizontal groove portion 21 at the front end of the deck plate 2 which is projected rearward and is located at the rear so as to prevent vertically flowing deck plates 2 connected to each other It is preferable that the upper front projection 341 and the upper front projection 342 are inserted into the horizontal groove 21 at the rear end of the deck plate 2 which is projected forward and is located forward.

In order to prevent the deck plate 2 connected to the rear from being detached from the rail-shaped connecting member 3, the rail-shaped connecting member 3 is provided at the upper and lower portions of the upper rear- A plurality of upper rear wedge-shaped protrusions 35 are formed on the upper and lower surfaces of the horizontal grooves 21 at an interval in the front and rear directions. Shaped connecting member 3 so as to prevent the deck plate 2 connected to the rear from being detached from the rail-shaped connecting member 3, It is preferable that a plurality of upper front wedge-shaped protrusions 36 are further formed on the lower surface.

The lower wedge-shaped protrusion 32 and the upper rear wedge-shaped protrusion 35 may be inclined rearwardly to prevent the rail-shaped connecting member 3 from being detached forward, and the rear wedge- Preferably, the upper front wedge-shaped protrusion 36 is formed obliquely forward so as to prevent the deck plate 2, which is located at the front, from being disengaged from the front, and is formed with a pointed front.

As shown in FIG. 6, the rail deck according to the present invention is a rail deck according to an embodiment of the present invention, in which the deck plate 2, which is connected to the front and rear of each of the rail-shaped connecting members 3, Further comprising a prevention means.

The left and right flow prevention means includes one or more left and right flow prevention holes 331 formed in the vertical plate 33 of the rail type connecting member 3 and a rear flow prevention hole 331 formed at the front end or the rear end of the deck plate 2, And left and right flow prevention fins 24 inserted into the left and right flow prevention holes 331 of the vertical plate 33. The left and right flow prevention pins 24 may be fixed to the front end or the rear end of the deck plate 2 by fastening or inserting.

Therefore, the present invention includes the left and right flow prevention means composed of the left and right flow prevention holes 331 and the left and right flow prevention pins 24, so that the deck plates 2, which are connected to the front and rear, There is also an advantage that it is prevented from being shifted to the "

Fig. 7 shows a state in which the left and right flow preventing means of another embodiment of the present invention is provided. Fig. 7A is a schematic exploded perspective view and Fig. 7B is a sectional view.

As shown in Fig. 7, the left and right flow preventing means of the other embodiment constituting the present invention is constituted by a vertical plate 33 projecting forward or backward by punching to the vertical plate 33 of the rail-shaped connecting member 3, The left and right flow prevention wedges 332 can be formed.

The left and right flow preventing means of the other embodiment may be constituted by a plurality of left and right flow preventing wedges 332 protruding forward and backward from the vertical plate 33 to the rail-shaped connecting member 3 and having a protruding end pointed .

That is, each of the left and right flow prevention wedges may be formed to protrude forward or backward by punching the vertical plate 33, most preferably protruding in a triangular shape that facilitates punching.

Therefore, according to the present invention, since the vertical plate 33 of the rail-shaped connecting member 3 is provided with the left and right flow preventing means, the deck plates 2 to be connected to the front and rear sides are moved not only in the front- There is also an advantage to prevent.

Hereinafter, the construction of the rail deck according to the present invention will be described.

As shown in FIGS. 1 to 7, when the rail deck according to the present invention is to be installed, first of all, at the upper part of two or more joists 1 arranged side by side in the front- The deck plates 2 are installed by fixing the rail-shaped connecting member 3 to the joist line 1 between the deck plates 2 while installing the deck plates 2 one by one in front.

A deck plate 2 is installed at the rear of the joist lines 1 and a rear deck plate 2 is provided at the rear of the deck plate 2, Like connecting member 3 is mounted on the joist line 1 and then the rear rail pressing member 311 formed on the rear side of the rail connecting member 3 through the process of pushing the rail connecting member 3 backward, The rear projection plate 341 is inserted into the front mounting depression grooves 22 and the horizontal grooves 21 of the deck plate 2 located at the rear side.

And the screws 317 are fastened and fixed to the screws 317 while fastening the screws 317 to the forward projecting and fixing plate 316 formed at the front of the next rail-shaped connecting member 3.

After the deck plate 2 is placed on the longitudinal lines 1 in front of the rail-shaped connecting member 3 fixed to the next joist line 1 and then the deck plate 2 is pushed rearward, The lower front projection 333 and the upper front projection 342 formed on the front side of the seat 3 are inserted into the rear mounting depression grooves 23 and the horizontal grooves 21 of the deck plate 2 positioned forward.

Then, the construction of the deck plates 2 is completed while repeating the above process.

Accordingly, in the present invention, the two deck plates 2 connected to each other are integrally connected to each other through a rail-shaped connecting member 3 formed to be long in the left-right direction and fixed to the joists 1, It is a useful invention for preventing the spaces between the joist lines 1 of the deck plate 2 from sinking downward.

Further, the present invention is a useful invention for preventing the deck plate from moving to the left and right, as well as preventing the deck plate from flowing back and forth by firmly connecting the deck plates.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is clear that the present invention can be suitably modified and applied in the same manner. Therefore, the above description does not limit the scope of the invention defined by the limitations of the following claims.

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 without departing from the scope of the present invention.

1: Joins
2: Deck plate
21: Horizontal groove
22: Front mounting recessed groove
221: Horizontal plane
23: rear mounting recessed groove
231: Horizontal plane
24: Left and right flow prevention pin
3: Rail type connecting member
31: Lower fixing portion
311: Lower rear stonewall, 312: Rear vertical stiffener,
313: lower front stones publication, 314: forward vertical stiffener,
315: securing means of the joist line, 316: forward projecting plate,
316a: Joint fixing hole, 317: Screw,
32: Lower wedge-shaped projection
33: Vertical plate
331: left and right flow prevention holes, 332: left and right flow prevention wedge
34: upper fixing part
341: upper rear stone publication, 342: upper front stone publication
35: upper rear wedge-shaped projection
36: upper front wedge-shaped projection

Claims (10)

A rail deck comprising two or more joists (1) each consisting of a corrugated pipe or a plurality of corrugated pieces arranged in a front-rear direction with a space therebetween,
A horizontal recess 21 is formed in the middle of each of the front and rear ends, and a front mounting recess 21 is formed at the front of each of the front and rear ends, A plurality of deck plates 2 on which grooves 22 are formed and rear mounting recesses 23 are formed in the rear of each of the lower portions to open rear and lower portions;
The front mounting recessed grooves 22 of the deck plate 2, which are long in the lateral direction on a plurality of joist lines 1 arranged side by side between two deck plates 2 connected to each other, And a lower fixing part 31 inserted into the rear mounting groove of the deck plate 2 which is fixed to the front side and fixed to the front side of the deck plate 2 is formed at the lower fixing part 31, And an upper fixing portion 34 is formed on the upper portion of the vertical plate 33 to be inserted into the horizontal groove portion 21 of the deck plate 2 that protrudes rearward and forward and is positioned rearward and forward A plurality of rail-shaped connecting members 3;
Lt; / RTI >
The rear mounting recess 23 includes a horizontal surface 231 at the top and the front mounting recess 22 includes a horizontal surface 221 at the top,
The lower fixing part 31 protrudes rearward and is attached to a horizontal surface 221 of the front mounting recess 22 and a rear vertical supporting bar 312 protruding downward and closely contacting the upper surface of the joists 1 And a lower surface protruding forward from the horizontal surface 231 of the rear mounting depression groove 23 and being in close contact with the upper surface of the long lines 1 And a lower front projection (313) having a front vertical reinforcement base (314) and a front fixing means (315) fixed to the front side (1)
The upper fixing part 34 includes an upper rear projection 341 which is inserted into the horizontal groove 21 at the front end of the deck plate 2 which is projected rearward and is located at the rear side, And an upper front projection (342) inserted into the horizontal groove (21) at the rear end of the deck plate (2)
One or more left and right flow prevention holes 331 formed in the vertical plate 33 of the rail-shaped connecting member 3 and one or more flow prevention holes 331 fixed to the front end or the rear end of the deck plate 2 by fastening or inserting, Left and right flow preventive pins 24 inserted into the left and right flow preventive holes 331 of the straight plate 33. The deck plates 2 mounted to be connected to the front and rear sides of the deck plates 2, The rail deck can be prevented from being moved to the left and right as a matter of course.
delete The method according to claim 1,
The joist line fixing means (315)
A front protruding fixing plate 316 protruding forward from a front lower portion of a front vertical supporting bar 314 of the lower front protruding plate 313 and having a screw setting groove portion 316a formed in a long left-
A screw 317 penetrating through the lower front protrusion 313 in each of the screw setting grooves 316a through the fastening and positioned at the top of the lower front protrusion 313 and fastened to each of the long sides 1,
And the rail deck.
The method of claim 3,
And an upper portion of the head of the screw (317) is in close contact with a horizontal plane (231) of the rear mounting depression (23).
The method of claim 3,
A lower surface of the front projecting and fixing plate 316 and a lower surface of the front vertical supporting bar 314
Wherein a plurality of lower wedge-shaped protrusions (32) are formed on the upper side of the joist line (1) at an interval in the longitudinal direction of the rail-shaped connecting member (3).
The method according to claim 1,
A plurality of upper rear wedge-shaped protrusions 35 are formed on the upper and lower portions of the upper rear projection 341 at the front and rear sides in the longitudinal direction of the rail-shaped connection member 3, Lt; / RTI >
A plurality of upper front wedge-shaped protrusions 36 are formed on the upper and lower portions of the upper front projection 342 at front and rear intervals in the longitudinal direction of the rail-shaped connection member 3, Is further formed in the rail deck.
The method according to claim 6,
The lower wedge-shaped protrusion 32 and the upper rear wedge-shaped protrusion 35 are inclined rearwardly to prevent the rail-shaped connecting member 3 from being detached forward,
Wherein the upper front wedge-shaped protrusion (36) is formed obliquely forward so as to prevent the deck plate (2) located at the front from being detached forwardly, and the front deck plate (2) is pointed forward.
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