KR101147317B1 - Honeycomb floor structure for railway vehicle - Google Patents

Honeycomb floor structure for railway vehicle Download PDF

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Publication number
KR101147317B1
KR101147317B1 KR1020100081748A KR20100081748A KR101147317B1 KR 101147317 B1 KR101147317 B1 KR 101147317B1 KR 1020100081748 A KR1020100081748 A KR 1020100081748A KR 20100081748 A KR20100081748 A KR 20100081748A KR 101147317 B1 KR101147317 B1 KR 101147317B1
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South Korea
Prior art keywords
hole
installation
support member
honeycomb plate
honeycomb
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KR1020100081748A
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Korean (ko)
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KR20120018845A (en
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이상복
최세중
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현대로템 주식회사
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Abstract

The present invention relates to a floor structure which is mounted on an upper surface of an underframe of a railway vehicle body to form a floor of a room. The honeycomb floor structure for a railway vehicle according to the present invention comprises a plurality of A support member having a coupling hole; A honeycomb plate having a plurality of hollow portions therein and formed with a plurality of installation holes and the plurality of installation holes being disposed on the upper surface of the support member corresponding to the plurality of engagement holes; A protector provided at a shape and size corresponding to the installation hole and inserted into the installation hole to protect the inner circumferential surface of the installation hole and having a through hole passing vertically through the center thereof; And a fastening member fastened to the coupling hole through the through hole to fix the honeycomb plate to the support member.
According to the present invention, the upper and lower plates constituting the inner circumferential surface of the mounting hole formed in the honeycomb plate and the protective member inserted into the mounting hole to protect the thin cross section of the rib are provided, Since the durability of the floor structure can be secured, the honeycomb plate is applied to the floor structure of the railway car, thereby realizing weight reduction and durability thereof. The mounting hole and the protecting member are provided with the end and the flange, respectively, so that the mounting hole and the protecting member can be easily installed.

Figure R1020100081748

Description

{Honeycomb floor structure for railway vehicle}

The present invention relates to a honeycomb bottom structure for a railway car, and more particularly, to a honeycomb bottom structure for a railway car which can realize weight reduction and durability and can be easily installed.

BACKGROUND ART [0002] Generally, a floor structure for a railway vehicle is mounted on an upper surface of an underframe of a railway vehicle body to form the floor of a cabin. Herein, unitex form has insufficient correspondence with thermal expansion and heat shrinkage, and in the case of aluminum vehicle having a large thermal expansion and heat shrinkage, mainly a floating floor form has been applied.

The floor structure of such a floating floor type railway car is basically composed of a plurality of plywood boards arranged and connected in a flat manner, and a floor material is provided on the upper surface of the plywood board.

FIG. 1 is a plan view showing a railway vehicle to which a floor structure of a railway vehicle constructed in the form of a floating floor is applied, and FIG. 2 is a sectional view taken along the line A-A shown in FIG. 1 of a floor structure of a railway vehicle having a floating floor.

The floor structure of a conventional railway rolling stock has a structure in which the ends 11 and 12 of the adjacent plywood 10 are overlapped with each other and the ends 11 and 12 of the plywood 10 are connected to each other. And a fastening member 30 such as a screw or a rivet is provided through the support frame 20 to fix the plywood 10 and the support frame 20. [

The conventional floor structure for a railway car is subjected to repetitive bending loads when the railway vehicle is operated. The two adjacent plywoods 10 penetrate the fastening holes 13 formed in the steps 11 and 12, The load is concentrated on the inner circumferential surface of the fastening hole 13, so that there is a problem in that it is vulnerable to such a bending load.

That is, in the conventional bottom structure for a railway vehicle, the joint portion of the plywood 10 is deformed by a repeatedly applied bending load, and cracks are generated on the top surface of the bottom structure for a railway car.

In addition, the conventional floor structure for a railway vehicle is formed by connecting the heavy plywood 10, which also has a heavy weight.

In recent years, aluminum honeycomb plates having high durability and light weight have been developed and applied to various fields. As shown in FIG. 3, the aluminum honeycomb plate is disposed between the upper plate 40 and the lower plate 50 And a plurality of ribs 60 are provided at predetermined intervals in a vertical direction to form a plurality of hollow portions 70. The plurality of ribs 60 may be formed of a plurality of hollow portions 70), which achieves weight reduction.

However, when the honeycomb plate is installed in a manner of penetrating the fastening member 30 like the above-described floating floor for applying the floor structure for a railway vehicle, a through hole is formed in the honeycomb plate for penetration of the fastening member 30 Only a thin section of the upper plate 40, the lower plate 50 and the rib 60 forms the inner peripheral surface of the through hole due to the hollow portion 70 inside the honeycomb plate member.

Therefore, when a bending load is applied to the floor structure for a railway vehicle thus installed, the durability is very weak because the bending load is concentrated on the inner circumferential surface of the weak through-hole having a narrow cross section. Such a honeycomb plate is difficult to apply to a floor structure for a railway vehicle .

Particularly, when the honeycomb plate is made of aluminum rather than ordinary steel, the honeycomb plate is lighter, but has a durability which is more problematic.

In order to solve the above-mentioned problems, it is an object of the present invention to provide a honeycomb plate having a weak cross-sectional structure in order to realize a lightweight structure. Even if a sufficient durability is ensured, And to provide a honeycomb bottom structure for a railway car which is easy to install.

According to an aspect of the present invention, there is provided a honeycomb bottom structure for a railway vehicle, comprising: a support member fixed to an upper side of an underframe and having a plurality of threaded holes; A honeycomb plate having a plurality of hollow portions therein and formed with a plurality of installation holes and the plurality of installation holes being disposed on the upper surface of the support member corresponding to the plurality of engagement holes; A protector provided at a shape and size corresponding to the installation hole and inserted into the installation hole to protect the inner circumferential surface of the installation hole and having a through hole passing vertically through the center thereof; And a fastening member fastened to the coupling hole through the through hole to fix the honeycomb plate to the support member.

Wherein the through hole has a step formed therein and an upper inner diameter of the through hole is larger than a lower inner diameter, and the fastening member is provided with a screw so that when the screw is fastened to the fastening hole, And may be positioned so as to be inserted into the through hole.

Wherein the protector has a flange formed along an upper peripheral surface thereof and an end portion corresponding to the shape of the flange is provided at an upper end of the mounting hole so that when the protector is inserted into the mounting hole, And guide the installation position of the protector.

A honeycomb bottom structure for a railway vehicle according to the present invention comprises: a support member fixed to an upper side of an underframe and having a plurality of engagement holes; A honeycomb plate having a plurality of hollow portions therein and formed with a plurality of installation holes and the plurality of installation holes being disposed on the upper surface of the support member corresponding to the plurality of engagement holes; A protector provided at a shape and size corresponding to the installation hole and inserted into the installation hole to protect the inner circumferential surface of the installation hole and having a through hole passing vertically through the center thereof; A fixing member having threaded holes formed with threads and disposed on the lower surface of the support member corresponding to the plurality of engagement holes; And a fastening member fastened to the screw hole through the through hole and the coupling hole to fix the honeycomb plate to the support member.

The supporting member may have a receiving groove for receiving the fixing member on a lower surface thereof and an entrance protrusion for preventing the fixing member from being detached from the receiving groove.

According to the honeycomb bottom structure for a railway car according to the present invention, the upper and lower plates constituting the inner circumferential surface of the mounting hole formed in the honeycomb plate and the protective member inserted and installed in the installation hole are provided to protect the thin cross- It is possible to secure strong durability as a floor structure of a railway vehicle which can sufficiently withstand a bending load repeatedly applied at the time of operation of the railway car by protecting the inner circumferential surface of the weak installation hole from contact damage with the fastening member.

In addition, by applying a light honeycomb plate having a plurality of hollows therein to a floor structure of a railway car, weight reduction can be realized, and the honeycomb plates can be firmly and firmly fixed at a boundary of the honeycomb plates, And the durability thereof can be further improved.

In order to prevent the head of the fastening member from being exposed to the upper side of the honeycomb plate, an end of the fastening member is located in the through hole of the protector so that the head of the fastening member is embedded in the through hole. .

In addition, although the protection member is provided to protect the inner circumferential surface of the installation hole, the installation hole and the protection member are provided with the end and the flange, respectively, so as to guide the installation position of the protection member with respect to the installation hole.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing a railway vehicle to which a bottom structure of a railway vehicle constructed in the conventional floating floor type is applied;
Fig. 2 is a cross-sectional view taken along the line AA shown in Fig. 1,
3 is a sectional view of an aluminum honeycomb plate,
4 is a sectional view of a honeycomb bottom structure for a railway car according to a preferred embodiment of the present invention,
FIG. 5 is an exploded perspective view showing a coupling relationship between a honeycomb plate member, a protective member, and a fastening member in a honeycomb bottom structure for a railway vehicle according to a preferred embodiment of the present invention,
6 is a perspective view of a honeycomb bottom structure for a railway vehicle according to a preferred embodiment of the present invention, in which a honeycomb plate is installed as a protector and a fastening member;
7A to 7F are views showing a procedure for installing a honeycomb bottom structure for a railway vehicle according to a preferred embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art will be able to easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

The honeycomb bottom structure for a railway vehicle according to the present invention is a lightweight honeycomb floor structure for a railway vehicle body which is mounted on an upper surface of an underframe of a railway vehicle body to form a floor structure, It is the floor structure of a railway vehicle.

Hereinafter, the configuration and operation effects of the honeycomb bottom structure for a railway car according to the preferred embodiment of the present invention will be described in detail with reference to FIGS. 4 to 6 attached hereto.

The honeycomb bottom structure for a railway car according to a preferred embodiment of the present invention includes a support member 100, a honeycomb plate 200, a protector 300, a fixing member 400, a fastening member 500, a sealant 600 A bottom member 700, and a cover member 800. [

The support member 100 is fixed on the underframe UF of the railway car and serves as a medium for connecting the honeycomb plates 200 constituting the bottom structure to each other and fixing the same to the underframe UF.

A buffer member 120 may be provided between the support member 100 and the underframe UF to mitigate shock and vibration transmitted from the underframe UF to the support member 100. [

A plurality of coupling holes 110 are formed in the support member 100 so that the honeycomb plate 200 can be fixed to both ends of the support member 100. A protrusion 140 protrudes upward from the center of the coupling hole. That is, a plurality of coupling holes 110 are formed on both sides of the protrusion 140, and the honeycomb plate 200 is fixed to both sides of the protrusion 140.

In order to fix the cover body 800 covering the boundary portion of the honeycomb plate 200 adjacently fixed to the protrusion 140, the engaging portion 810 of the cover body 800 to be described later may be hooked A locking protrusion 141 is formed.

4, the support member 100 is disposed on the lower surface of the support member 100 in correspondence with the plurality of engagement holes 110 to fix the honeycomb plate 200 to the support member 100 500 are accommodated in the receiving groove 150. The receiving groove 150 is formed on the bottom surface of the receiving groove 150 for receiving the fixing member 400 having the screw hole 410 formed therein, Preventing protrusion 151 for preventing the member 400 from being released is formed.

In the preferred embodiment of the present invention, the support member 100 has a protrusion 140 formed at the center thereof, and a cover member 800 is provided. On the lower surface of the cover member 800, a receiving groove 150 is formed, However, the present invention is not limited to this, but may have a different structure.

For example, the support member 100 may be configured such that a boundary portion of the honeycomb plate members 200 is adjacent or contacted without the protrusion 140 and the cover member 800, and the fixation member 500 is fixed A thread is formed on the inner circumferential surface of the plurality of coupling holes 110 without the member 400 so that the coupling member 500 is directly fastened to the coupling hole 110 formed with the thread.

However, when the support member 100 is made of aluminum having a stiffness lower than that of steel for lightweight implementation, rather than being fastened to the fastening member 500 directly by the fastening member 110, And a fixing member 400 made of a material having a predetermined thickness.

The honeycomb plate 200 together with the supporting member 100 forms a basic structure of a floor structure constituting the floor of a room. The honeycomb plate 200 includes an upper plate 200-1, a lower plate 200-2, upper and lower plates 200- 1 is a lightweight plate-like material having a plurality of hollows 200-4 formed therein, and a plurality of ribs 200-3 vertically connecting the plurality of ribs 200-3. In order to maximize the lightness, do.

The thickness of the upper plate 200-1 and the thickness of the lower plate 200-2 are respectively 2 mm and 0.8 mm and the thickness and spacing of the rib 200-3 are 0.07 mm, and 9.5 mm, and the inside of the hollow portion 200 - 4 may be empty, but the specific dimensions thereof are not limited thereto, and the inside of the hollow portion 200 - 4 may be made of polyisocyanate Filled with filler may be applied.

The plurality of ribs 200-3 of the honeycomb plate member 200 may be arranged in a honeycomb shape or in a side-by-side manner when viewed from a plane, but the present invention is not limited thereto.

The honeycomb plate 200 is formed with a plurality of mounting holes 210 corresponding to the coupling holes 110 of the support member 100 and having a size into which the protector 300 can be inserted. The inner circumferential surface of the mounting hole 210 is formed by a thin cross section of the upper and lower plates 200-1 and 200-2 and the rib 200-3 and has poor durability. In order to protect the inner circumferential surface.

The upper end of the mounting hole 210 is provided with an end portion 211 corresponding to the shape of the flange 320 so as to be in contact with the flange 320 formed along the upper outer circumferential surface of the protector 300 described later. The end portion 211 and the flange 320 are brought into contact with each other when the protector 300 is completely inserted into the installation hole 210. By guiding the insertion position of the protector 300 with respect to the installation hole 210, Facilitating installation.

The protector 300 is attached to the inner circumferential surface of the installation hole 210 having a weak structure as described above so that the inner circumferential surface of the installation hole 210 is fastened to the support member 100 for fixing the honeycomb plate 200 to the support member 100 The inner circumferential surface of the installation hole 210 is protected by blocking the contact with the outer circumferential surface of the member 500.

Accordingly, the protector 300 is provided in a size and shape so that the outer circumferential surface thereof can correspond to the inner circumferential surface of the installation hole 210, and as shown in FIG. 5, the coupling member 500 is installed The through hole 310 is formed.

An end 311 is formed in the through hole 310 so that an upper inner diameter of the through hole 310 is larger than a lower inner diameter of the through hole 310. This allows the fastening member 500 to pass through the through hole 310, The head of the fastening member 500 is caught by the step 311 and is positioned so as to be embedded in the through hole 310.

6 is a view showing that the head of the fastening member 500 is positioned so as to be embedded in the through hole 310. In this case, the head of the fastening member 500 is not protruded to the upper side of the honeycomb plate 200 The fastening member 500 can be attached to the supporting member 100 (see FIG. 10) as another method for easily mounting the flooring 700 uniformly on the upper surface of the honeycomb plate 200 and for preventing the head of the fastening member 500 from projecting. In a direction from the lower side to the upper side, it is not necessary to take a complicated installation method.

As described above, since the flange 320 is formed on the upper outer circumferential surface of the protective body 300, when the protective body 300 is inserted into the mounting hole 210, the end portion 211 of the mounting hole 210 Thereby guiding the inserting position of the protector 300 with respect to the installation hole 210. [

The fixing member 400 includes a threaded hole 410 formed at the center thereof so that the fastening member 500 can be fastened to the fastening member 500. The fastening member 500 and the honeycomb plate 200 together with the fastening member 500, As shown in FIG.

For this purpose, the fixing member 400 is accommodated in the receiving groove 150 formed in the lower surface of the supporting member 100, and unlike the supporting member 100 made of light aluminum having a relatively low rigidity, So as to withstand the bending load repeatedly applied during the operation of the railway vehicle and stably maintain the fastening with the fastening member 500.

The fixing member 400 is received in the receiving groove 150 before the honeycomb plate 200 is disposed on the upper side of the supporting member 100 in the order of installation of the honeycomb bottom structure for a railway car according to the present invention, The separation preventing protrusion 151 is prevented from being disengaged from the receiving recess 150 even when the connecting member 500 is not fastened to the fastening member 500. [

The fastening member 500 is formed of a screw or the like used as a general fastening means and passes through the fastening member 400 through the through hole 310 of the protector 300 and the fastening hole 110 of the support member 100, And fixes the honeycomb plate member 200 to the support member 100. The honeycomb plate member 200 is fixed to the support member 100 by screws.

The sealant 600 is installed to fix the honeycomb plate 200 to the support member 100 after the fastening member 500 is fastened to the inside of the through hole 310 in which the head of the fastening member 500 is inserted, Thereby preventing the fastening member 500 from being detached, and protecting the fastening member 500 from external moisture or the like.

It is noted that such a sealant 600 is not an essential component in realizing the honeycomb bottom structure for a railway vehicle according to the present invention.

The flooring material 700 is made of a material having elasticity and is provided flat to cover the upper surface of the honeycomb plate material 200 fixed to the supporting member 100 to block moisture from penetrating. That is, the bottom material 700 physically protects the honeycomb plate 200 and prevents corrosion due to moisture penetration.

The floor material 700 is a member that directly contacts the passenger's shoes on the floor of the cabin of the railway vehicle, so that the floor material 700 may be made of a resin material that prevents passengers from slipping.

4, the cover member 800 covers the protrusion 140 of the support member 100 positioned at the boundary of the honeycomb plate members 200 to protect the support member 100 and to protect the honeycomb plate member 200 200).

The cover member 800 covers the boundary portion of the honeycomb plate members 200 and the protrusion 140 to prevent moisture and foreign matter from flowing into the honeycomb plate member 200 and the support member 100.

When the cover body 800 is made of a material having elasticity and is fitted to the protrusion 140 so as to be caught in the protrusion 140, the cover body 800 is elastically deformed by the elastic force of the upper surface of the honeycomb plate 200 and the protrusion 140 As shown in Fig. Since the cover member 800 is also a member that directly contacts with the shoes of the passengers like the floor material 700, the cover member 800 can be made of a material that can prevent slippage of passengers.

A locking part 810 is formed on the lower side of the center of the cover body 800. The locking part 810 is hooked on the locking protrusion 141 formed on the protrusion part 140 to install the cover body 800 It is simple but its installation strength is high. Of course, the cover body 800 may be installed in the protrusion 140 in various manners known to those skilled in the art.

Hereinafter, the installation order and use state of the honeycomb bottom structure for a railway car according to a preferred embodiment of the present invention will be described in detail with reference to FIGS. 7A to 7F.

First, as shown in Fig. 7A, the supporting member 100 is installed on the upper surface of the underframe UF of the railway car with the cushioning member 120 interposed therebetween by using the fixing means 130. Fig. At this time, the fixing member 400 is installed to be received in the receiving groove 150 of the lower surface of the supporting member 100.

7B, the honeycomb plate 200 is mounted on the supporting member 100 such that the mounting hole 210 of the honeycomb plate 200 corresponds to the fitting hole 110 of the supporting member 100. [ .

As shown in FIG. 7C, the protector 300 is inserted into the installation hole 210 to reinforce the weak inner circumferential surface of the installation hole 210. When the protector 300 is completely inserted into the installation hole 210, the flange 320 formed along the upper end periphery of the protector 300 contacts the upper end 210 of the installation hole 210, Guiding the mounting position of the protective body 300 with respect to the main body 210.

7D, the fastening member 500 is passed through the through holes 310 of the protector 300 and the fastening holes of the support member 100 in this order so that the screw holes (not shown) of the fastening member 400 410). At this time, the fastening member 500 is installed so as to be embedded in the through hole 310 while its head contacts the step 311 formed in the through hole 310. Accordingly, since a part of the fastening member 500 does not protrude above the honeycomb plate 200, the upper surface of the honeycomb plate 200 is neatly provided.

The sealant 600 is filled and hardened in the through hole 310 so as to cover the head of the fastening member 500 to thereby stably protect the fastening member 500 and prevent the fastening thereof from being released.

Next, as shown in FIG. 7E, a floor material 700 made of a material having elasticity for protecting the honeycomb plate 200 and preventing passengers from slipping is installed on the upper surface of the cleanly formed honeycomb plate 200 .

7F, the engaging portion 810 of the cover body 800 is fitted to the engaging projection 141 of the protrusion 140 formed on the support member 100 to engage with the cover body 800 The boundary portion of the honeycomb plate members 200 and the protrusion 140 are covered with the cover member 800 so that the installation of the honeycomb bottom structure for a railway vehicle according to the preferred embodiment of the present invention is completed .

As described above, according to the honeycomb bottom structure for a railway car according to the present invention, the upper and lower plates 200-1 and 200-2 and the ribs 200-1 and 200-2 forming the inner circumferential surface of the mounting hole 210 formed in the honeycomb plate 200, The protector 300 inserted in the installation hole 210 is provided to protect the thin cross section of the railway car 200-3 so that strong durability as a bottom structure of the railway car which can withstand repeatedly applied bending loads can be ensured Therefore, by applying the honeycomb plate 200 having the hollow portion 200-4 to the floor structure of the railway car, it is possible to realize a light weight and greatly enhance the durability thereof, The end portion 211 and the flange 320 are provided on the mounting hole 210 and the protector 300 so as to guide the installation position of the protector 300 on the side of the protector 300,

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. will be.

Description of the Related Art [0002]
100: supporting member 110: engaging hole
120: buffer 130: fixing means
140: protrusion 141:
150: receiving groove 151:
200: Honeycomb plate 200-1: Top plate
200-2: lower plate 200-3: rib
200-4: hollow part 210: installation hole
211: end 300: protector
310: Through hole 311:
320: flange 400: fixing member
410: screw hole 500: fastening member
600: Sealant 700: Flooring
800: cover body 810:
UF: Underframe

Claims (5)

A bottom structure mounted on an upper surface of an underframe of a railway vehicle body to form a floor of a cabin,
A support member fixed to the upper side of the underframe and having a plurality of threaded engagement holes;
A honeycomb plate having a plurality of hollow portions therein and formed with a plurality of installation holes and the plurality of installation holes being disposed on the upper surface of the support member corresponding to the plurality of engagement holes;
A protector provided at a shape and size corresponding to the installation hole and inserted into the installation hole to protect the inner circumferential surface of the installation hole and having a through hole passing vertically through the center thereof; And
A fastening member fastened to the coupling hole through the through hole to fix the honeycomb plate to the support member;
And a floor structure for a railway car. The method according to claim 1,
Wherein the through hole has a step formed therein and an upper inner diameter of the through hole is larger than a lower inner diameter, and the fastening member is provided with a screw so that when the screw is fastened to the fastening hole, And is positioned so as to be embedded in the inside of the through hole. 3. The method according to claim 1 or 2,
Wherein the protector has a flange formed along an upper peripheral surface thereof and an end portion corresponding to the shape of the flange is provided at an upper end of the mounting hole so that when the protector is inserted into the mounting hole, And guiding the installation position of the protector. A bottom structure mounted on an upper surface of an underframe of a railway vehicle body to form a floor of a cabin,
A support member fixed to the upper side of the underframe and having a plurality of engagement holes;
A honeycomb plate having a plurality of hollow portions therein and formed with a plurality of installation holes and the plurality of installation holes being disposed on the upper surface of the support member corresponding to the plurality of engagement holes;
A protector provided at a shape and size corresponding to the installation hole and inserted into the installation hole to protect the inner circumferential surface of the installation hole and having a through hole passing vertically through the center thereof;
A fixing member having threaded holes formed with threads and disposed on the lower surface of the support member corresponding to the plurality of engagement holes; And
A fastening member fastened to the screw hole through the through hole and the fitting hole to fix the honeycomb plate to the support member;
And a floor structure for a railway car. 5. The method of claim 4,
Wherein the support member comprises:
Wherein a receiving groove for receiving the fixing member is formed on a lower surface thereof and an escape preventing protrusion for preventing the detachment of the fixing member is formed at an inlet of the receiving groove.
KR1020100081748A 2010-08-24 2010-08-24 Honeycomb floor structure for railway vehicle KR101147317B1 (en)

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106428056B (en) * 2016-10-31 2018-11-06 中车株洲电力机车有限公司 A kind of rail traffic vehicles equipment floor board mounting structure
KR101956473B1 (en) * 2017-10-19 2019-03-08 주식회사 다원시스 Floor structure of railway vehicle

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11278259A (en) 1998-03-30 1999-10-12 Kawasaki Heavy Ind Ltd Coupling structure for floor board and floor board bearing at floor board junction
KR20010001668A (en) * 1999-06-07 2001-01-05 서영헌 Aaaaa
KR100852643B1 (en) 2007-06-29 2008-08-18 현대로템 주식회사 Plywood joint structure for floor of railway vehicle
KR200449063Y1 (en) 2008-03-17 2010-06-10 현대로템 주식회사 Connecting structure for boards of floor structure of a railroad car

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11278259A (en) 1998-03-30 1999-10-12 Kawasaki Heavy Ind Ltd Coupling structure for floor board and floor board bearing at floor board junction
KR20010001668A (en) * 1999-06-07 2001-01-05 서영헌 Aaaaa
KR100852643B1 (en) 2007-06-29 2008-08-18 현대로템 주식회사 Plywood joint structure for floor of railway vehicle
KR200449063Y1 (en) 2008-03-17 2010-06-10 현대로템 주식회사 Connecting structure for boards of floor structure of a railroad car

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