KR101605341B1 - Hatch cover assembly for high pressure - Google Patents

Abstract

The present invention relates to a hatch cover assembly for high pressure, which comprises: a block which is combined with an entrance; a hatch cover which is combined to be able to be opened and closed on the block; and a cover opening/closing unit which enables the hatch cover to be opened and closed on the block. The cover opening/closing unit includes: a vertical shaft which is combined to be able to rotate by penetrating the hatch cover; an upper handle and a lower handle which are fixated and combined individually with the upper part of the vertical shaft and the lower part of the vertical shaft based on the hatch cover; a vertical motion coupling pipe which moves up and down along the vertical shaft by being screw-combined with the vertical shaft between the lower side of the hatch cover and the lower handle and being linked with the rotation of the upper and lower handles; a plurality of vertical motion support bars which has one end to be linked with the outside of the vertical motion coupling pipe, has the other end to be arranged in the state of a free end, and vertically moves between a closed state arranged vertically on the hatch cover and an open state arranged to be inclined downwards from the hatch cover by being linked with the vertical movement of the vertical motion coupling pipe; and a vertical motion guide bar which guides the vertical movement of each vertical motion support bar by being extended to the lower part from the lower side of the hatch cover and being combined with an area of the vertical motion support bar.

Description

[0001] HATCH COVER ASSEMBLY FOR HIGH PRESSURE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hatch cover assembly, and more particularly, to a high pressure hatch cover assembly that allows a user to open and close with a small force while maintaining sealing efficiency even under high pressure.

In general, hatches refer to the hatches and hatches of vessels, and in particular, the penetrations that open and open the deck for loading or unloading cargo. The hatch is combined with a hatch cover that opens and closes the hatch.

The hatch cover is used to prevent seawater from flowing into the ship.

Such a hatch cover is disclosed in " Hatch Cover Opening and Closing Structure for Ship "in Japanese Patent Laid-Open No. 10-2013-0060493.

1 is a schematic view schematically showing the configuration of a conventional hatch cover assembly 10. Fig. As shown, the conventional hatch cover assembly 10 includes a handle 14 rotatably mounted on the top of the hatch cover 11 and adapted to rotate about a vertical axis 15 coupled to the handle 14, The non-gear device rotates. The plurality of horizontal links 13 are rotated in the horizontal direction by the rotation of the gear device, and the hatch cover 11 is opened and closed.

In the conventional hatch cover assembly 10 having such a configuration, since the plurality of horizontal links 13 are moved in the horizontal direction and the hatch cover 11 is opened, the user rotates the handle 14 only by the force of the arm at a high pressure of 2 bar or more There is no limit. Accordingly, the user can increase the torque for rotating the handle 14 by combining the separate wrenches. In this case, however, the user's physical strength is difficult and the wrench must be used.

In addition, the conventional hatch cover assembly 10 uses an O-ring in the leakage path of the engagement region of the handle and the hatch cover to increase the sealing efficiency. However, the O-ring can be smoothly operated at a low pressure of 2 bar or less, but there is a structural problem in that the sealing efficiency is lowered at a high pressure where the internal pressure is increased.

For this purpose, a plurality of O-rings may be additionally mounted to improve the sealing efficiency. In this case, however, the frictional resistance may increase, and the rotational torque of the handle may increase.

SUMMARY OF THE INVENTION An object of the present invention is to provide a high pressure hatch cover assembly capable of easily rotating the handle even under high pressure.

It is a further object of the present invention to provide a high pressure hatch cover assembly that can meet sealing efficiency at high pressure.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention by those skilled in the art.

The object of the invention can be achieved by a high pressure hatch cover assembly. A high pressure hatch cover assembly of the present invention comprises: a block coupled to an entrance; A hatch cover openably and closably coupled to the block; And a cover opening / closing part for opening / closing the hatch cover to / from the block, wherein the cover opening / closing part includes: a vertical axis rotatably coupled through the hatch cover; An upper handle and a lower handle fixedly coupled to an upper portion of the vertical axis and a lower portion of the vertical axis with respect to the hatch cover; A lift coupling pipe screwed to the vertical shaft between the lower handle and the lower surface of the hatch cover to vertically move up and down along the vertical axis in conjunction with rotation of the upper handle and the lower handle; The hitch cover according to any one of claims 1 to 3, wherein the hitch cover includes a lock state in which one end is linked to the outside of the lift coupling pipe and the other end is disposed in a free end state, A plurality of elevating support bars for moving up and down between the open states in which the plurality of elevating support bars are arranged; And an elevation guide bar extending downward from a lower surface of the hatch cover and coupled to one area of the elevation support bar to guide the elevation support bar up and down.

According to an embodiment of the present invention, the inner wall surface of the block may be provided with a locking protrusion that is held in contact with the other end of the elevating support bar in the locked state to maintain the locked state of the hatch cover and the block.

According to an embodiment of the present invention, a length of the axial movement slit to which the guide bar fixing bolt linked with the lower portion of the elevation guide bar is formed is formed on the plate surface of the elevation support bar, And a maximum rotation angle of the lifting support bar between the locked state and the opened state and the length of the locking projection.

According to one embodiment, the bushing supports the rotation of the vertical axis at the coupling region of the hatch cover and the vertical axis; At least one sealing member that is hermetically coupled to the inner wall surface of the bushing is provided, and the sealing member may be provided as a quadring having four rounded protrusions formed in a cross section.

The hatch cover assembly according to the present invention opens / closes the hatch cover by a plurality of lifting and lowering supporting bars lifted up and down from a horizontal link system which has conventionally operated in the horizontal direction.

Accordingly, when the user rotates the handle with the same force, the output torque can be 8 times that of the conventional horizontal link method, and the hatch cover can be opened and closed with a small force under high pressure.

Further, the sealing force between the vertical axis and the hatch cover can be further improved by using a quadring having an excellent sealing force as compared with the conventional O-ring.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the construction of a conventional hatch cover assembly,
2 is a perspective view showing a state in which the hatch cover assembly according to the present invention is closed,
3 is a perspective view showing a state in which the hatch cover assembly according to the present invention is opened,
4 is a cross-sectional view illustrating a cross-sectional configuration of a hatch cover assembly according to the present invention,
5 is a perspective view showing the configuration of a cover opening and closing part in a closed state of the hatch cover assembly according to the present invention,
6 is a perspective view showing a configuration of a cover opening and closing part in an open state of the hatch cover assembly according to the present invention,
7 and 8 are views showing considerations for designing a lifting support bar of a hatch cover assembly according to the present invention,
9 is a perspective view showing a configuration of a sealing member of a hatch cover assembly according to the present invention.

For a better understanding of the present invention, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be modified into various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. The present embodiments are provided to enable those skilled in the art to more fully understand the present invention. Therefore, the shapes and the like of the elements in the drawings can be exaggeratedly expressed to emphasize a clearer description. It should be noted that in the drawings, the same members are denoted by the same reference numerals. Detailed descriptions of well-known functions and constructions which may be unnecessarily obscured by the gist of the present invention are omitted.

FIG. 2 is a perspective view illustrating a closed configuration of the hatch cover assembly 100 according to the present invention, and FIG. 3 is a perspective view illustrating a configuration in which the hatch cover assembly 100 is opened. As shown in the drawings, the hatch cover assembly 100 according to the present invention is coupled to an entrance of a ship or a submarine to isolate the space from the space, or to seal the inside and the outside.

The hatch cover assembly 100 includes a block 110 coupled to an entrance (not shown), a hatch cover 120 openably and closably coupled to the block 110, And a cover opening / closing part 130 for opening /

The block 110 is provided corresponding to the size of an entrance (not shown) and fixedly coupled to an entrance (not shown). On the side surface of the block 110, a cover coupling arm 111 coupled with the hinge shaft 123 is formed to have a predetermined length. A plurality of locking protrusions 113 are provided on the inner wall surface of the block 110 to contact the lift bar 136 of the cover opening and closing part 130 to be described later and to hold the hatch cover 120 in a closed state. The locking protrusions 113 are formed so as to correspond to the horizontal positions of the plurality of lifting support bars 136.

The hatch cover 120 is openably and closably coupled to the top of the block 110. When the hatch cover 120 is installed horizontally, the hatch cover 120 is coupled to the upper portion of the block 110. When the hatch cover 120 is installed vertically, the hatch cover 120 is coupled to one side of the block .

The hatch cover 120 is formed to have an area that can cover the open top opening of the block 110. A block coupling arm 121 connected to the hinge shaft 123 is formed at an upper portion of the hatch cover 120 by a predetermined length. The block coupling arm 121 and the cover coupling arm 111 are coupled to share the hinge axis 123. So that the hatch cover 120 can be opened around the hinge shaft 123.

An elastic member 125 is coupled to the cover engagement arm 111 at one side of the hinge shaft 123. When the hatch cover 120 is opened by the cover opening / closing part 130, the elastic member 125 applies an elastic force in a direction in which the hatch cover 120 is opened so that the force of the user is less required to open the hatch cover 120 .

Upper and lower portions of the hatch cover 120 are provided with an upper knob 127 and a lower knob 128, respectively, which can be held by the user when the hatch cover 120 is opened.

The cover opening and closing part 130 is closed under a high pressure with the hatch cover 120 sealed in the block 110 so that the user can open the hatch cover 120 with a small force. The cover opening / closing part 130 of the present invention applies a force in the vertical direction so that the hatch cover 120 is opened. 1, the horizontal link 13 is moved in the horizontal direction and the hatch cover 11 is opened. On the contrary, the cover opening and closing part 130 of the present invention is configured to move up and down the vertical axis 133 The plurality of lifting and supporting bars 136 move up and down in an inclined manner to open and close the hatch cover 120. [

4 is a perspective view showing the configuration of the cover opening and closing part 130 when the hatch cover assembly 100 is closed and FIG. 5 is a perspective view showing the configuration of the cover opening and closing part 130 when the hatch cover assembly 100 is opened. And FIG. 6 is a cross-sectional view showing a sectional configuration of the hatch cover assembly 100 in a closed state and an open state.

The cover opening and closing part 130 includes an upper handle 131 provided at an upper portion of the hatch cover 120, a lower handle 132 provided at a lower portion of the hatch cover 120, A vertical shaft 133 coupled to the upper and lower handles 131 and 132 and a bushing 134 for supporting the vertical shaft 133 to rotate within the hatch cover 120, A lifting coupling pipe 135 which is vertically coupled to the vertical shaft 133 between the handles 132, a plurality of lifting and supporting bars 136 radially coupled to the outer periphery of the lifting and coupling pipe 135, A lift guide bar 137 for guiding the lifting and lowering of the bar 136 and a sealing member 139 disposed between the bushing 134 and the vertical shaft 133 to improve the sealing force.

The upper handle 131 and the lower handle 132 are coupled to the upper and lower ends of the vertical shaft 133, respectively, and are rotated by a force from the user. The user grasps the outer periphery of the upper handle 131 and the lower handle 132 to apply a force so that the vertical axis 133 is rotated.

The vertical shaft 133 is formed with a handle coupling shaft 133a through which the upper handle 131 and the lower handle 132 are inserted. The handle coupling shaft 133a is formed in a polygonal cross-section as shown in FIG. 4, so that the upper handle 131 and the lower handle 132 are kept in a fixed state without being rotated. A bushing 134 is coupled to a lower portion of the handle coupling shaft 133a. The bushing 134 is disposed inside the hatch cover 120 as shown in Fig. 6 to support the vertical shaft 133 in a rotatable manner. At this time, the bushing 134 is formed such that the space closest to the bushing 134 is small so that the sealing force is maintained in the engagement area with the vertical shaft 133. Between the bushing 134 and the vertical shaft 133, a sealing member 139 is provided. The sealing member 139 may be inserted in the form of an O-ring.

In the lower region of the vertical axis 133, a predetermined length of the first screw thread 133b is formed. Here, the lift coupling pipe 135 moves up and down by the length of the first screw thread 133b.

The lifting and coupling tube 135 is screwed to the first screw thread 133b of the vertical shaft 133 and vertically moves up and down in association with the rotation of the vertical shaft 133. A second screw thread (not shown) corresponding to the first screw thread 133b is formed on the inner wall surface of the up / down coupling pipe 135. A plurality of engaging ribs 135a are integrally formed on the outer circumferential surface of the lifting and coupling tube 135.

The elevating support bar 136 is moved up and down between the locked state and the open state in conjunction with the rotation of the vertical shaft 133. The rib support portion 136a of the lifting support bar 136 is linked to the engaging rib 135a so as to rotate about the engaging rib 135a and the lifting free end 136b is moved up and down in a free end state.

The elevating support bar 136 is formed in the shape of a bar having a predetermined length. The rib joint end 136a formed at one end is coupled to the engagement rib 135a by the link shaft 135b and is rotated around the link shaft 135b. When the vertical shaft 133 is rotated and the lift coupling pipe 135 is moved to the upper portion of the vertical shaft 133, the rib coupling end 136a is rotated around the link shaft 135b, And is moved to a tilted state.

The lift-up free end 136b formed at the other end of the lifting support bar 136 is supported by the lower portion of the locking protrusion 113 as shown by the solid line in FIG. 6 so that the locked state of the hatch cover 120 is stably maintained do. The lift-up free end 136b of the lifting support bar 136 is spaced from the locking protrusion 113 in the open state as shown by the dotted line in Fig. 6, so that the hatch cover 120 is opened. Here, when the hatch cover 120 is opened, the lift-up free end 136b is designed to move upward without interfering with the locking projection 113. [

On the other hand, a projection insertion groove 136c into which the locking projection 113 is inserted is formed at a certain depth on the elevation free end 136b of the elevation support bar 136. [ The projection insertion groove 136c is brought into contact with the lower portion of the locking projection 113 in a locked state in which the lifting support bar 136 is horizontally disposed and is prevented from moving so that the hatch cover 120 is kept closed.

On the plate surface of the lifting support bar 136, an axial movement slit 136d is formed through a certain length. The shaft moving slit 136d moves the guide bar fixing bolt 137a of the lift guide bar 137 to the left and right to guide the movement of the lift support bar 136 when the lift bar 136 is moved up and down . The design of the position and length of the axial movement slit 136d will be described in detail below.

The lifting and lowering guide bar 137 supports the lifting and lowering support bar 136 to be moved from the horizontal to the inclined state when the lifting and lowering coupling pipe 135 is moved upward and downward in conjunction with the rotation of the vertical shaft 133. The elevation guide bar 137 extends vertically from the lower surface of the hatch cover 120 as shown in Fig. The lower portion of the lifting support bar 136 is engaged with the axial movement slit 136d by the guide bar fixing bolt 137a.

At this time, the guide bar fixing bolt 137a is provided so as to be moved laterally along the axial movement slit 136d. 6, when the elevation support bar 136 is inclinedly moved from the horizontally arranged position in the locked state to the open state, the guide bar fixing bolt 137a is moved along the axial movement slit 136d So that the lifting and supporting bar 136 can be stably moved up and down.

FIGS. 7 and 8 are schematic views illustrating the considerations in designing the lifting support bar 136 according to the present invention. 7 is an exemplary view showing matters to be considered in order to determine where the position of the lifting and lowering end 136b of the lifting support bar 136 is located.

Four lift bars 136 are provided at an angle of 90 degrees along the outer periphery of the lift coupling pipe 135. However, the elevating support bars 136 may be provided at various angles such as three angles at intervals of 120 degrees or six angles at intervals of 60 degrees.

When the hatch cover 120 is closed, the elevation free ends 136b of the four elevation support bars 136 are kept in contact with the locking protrusions 113. When the hatch cover 120 is opened, The lifting and freeing end 136b of the bar 136 is pulled out to the inside of the locking protrusion 113. [

의 힘을 가하면 발생하는 토크는 다음과 같다. :

.The upper handle 131 of the hatch cover 120 may be vertically

The torque generated by the application of the force is as follows. :

.

가 클수록 발생하는 토크도 크다. 상부핸들(131)을 길이 d인 렌치로 잡고 돌리면 힘이 가해지는 직경

가 되게 만드는 것이다. 그러면 토크가

로 증가한다. Since the diameter R of the upper handle 131 is fixed,

The larger the torque is, the larger the torque is. When the upper handle 131 is held by a wrench having a length d, the diameter

. Then torque

.

로 인해 해치 내부에서 발생하는 힘

가

나 비슷하다. :

.The horizontal locking scheme of the conventional hatch cover assembly 10 shown in Figure 1

Force generated inside the hatch due to

end

I am similar. :

.

이다. 출력힘

가

나 비슷하므로 출력힘도 100N이다. 100N의 힘으로 사용자 혼자서 상부핸들(131)을 밀봉시키는 것은 현실적으로 힘든 상황이다. For example, if x = 5 cm and the diameter R of the upper handle 131 is 20 cm and a person applies a force to hear two 10 kg dumbbells vertically on each side of the upper handle 131,

to be. Output force

end

The output power is 100N. It is practically difficult to seal the upper handle 131 by the user alone with a force of 100N.

On the other hand, in the hatch cover assembly 100 of the present invention, the position of the point A, that is, the rib coupling end 136a moves up and down as shown in FIG. 7 (a). The position of the guide bar fixing bolt 137a coupled to the axial movement slit 136d is moved to the left and right by a predetermined length.

로 변한다. :

The above-mentioned torque is transmitted to each lift support bar 136 as shown in Fig. 7 (b)

. :

는 다음과 같다.:

Therefore, the force for closing the hatch cover 120

Is as follows:

는 거의 70~90도 이므로

. 따라서 근사적으로

로 두어도 된다. 그러면 발생하는 힘은 아래와 같다. :

bracket

Is approximately 70 to 90 degrees

. Therefore,

. Then, the force generated is as follows. :

이다. 출력 힘은 이의 8배이므로 800N이다. 이는 사용자 혼자서 충분히 해치커버(120)를 밀봉할 수 있는 힘이다.
For example, if x = 5 cm and the diameter R of the upper handle 131 is 20 cm, the force generated is 8 times. Assuming that a person applies a force to hear two 10 kg dumbbells vertically on both sides of the upper handle 131,

to be. The output force is 800N since it is 8 times of this. This is a force by which the user can sufficiently seal the hatch cover 120 alone.

  Since the principle of the lever is used once more, the vertical locking method using the elevating support bar 136 of the present invention generates a larger force than the horizontal locking method using the conventional horizontal link. Since R is fixed, reducing the distance x from the lifting free end 136b to the axial movement slit 136d as much as possible can generate a large amount of force.

 The smaller the distance x from the lifting free end 136b to the axial moving slit 136d is, the more force is generated. Therefore, the distance x may be reduced, but if the distance x is too small, The end of the lifting and freeing end 136b of the door 136 is caught by the locking protrusion 113 and the door is not opened. Therefore, when determining the position of the distance x, it is necessary to check whether the hitch cover 120 comes into contact with the locking projection 113 when the hatch cover 120 is opened and closed so that no interference occurs in the copper wire. It is preferable that the position of the axial movement slit 136d is arranged close to the lift-up free end 136b in a natural state of the opening and closing of the hatch cover 120. [

.

On the other hand, since the lifting and freeing end 136b is repeatedly brought into contact with the locking protrusion 113 when the hatch cover 120 is opened and closed, it is preferably made of a hard material as much as possible.

8A and 8B are diagrams showing an example of a cross section of the elevation support bar 136 and a rotation angle of the elevation support bar 136 when the hatch cover 120 is opened. Referring to FIG. 8, a process of determining the moving distance of the lifting and lowering coupling pipe 135, the moving distance of the guide bar fixing bolt 137a, and the rotation angle of the lifting support bar 136 will be described.

The definitions of the terms shown in the drawings are as follows.

P1: When the hatch cover 120 is closed, the position of the lift coupling pipe 135

P2: When the hatch cover 120 is completely opened, the position of the lift coupling pipe 135

Q1: When the hatch cover 120 is closed, the position of the guide bar fixing bolt 137a

Q2: When the hatch cover 120 is completely opened, the position of the guide bar fixing bolt 137a

Y: Maximum vertical motion range (constant) of the upper handle (lower handle)

   The greater the Y, the less force the user has to open the hatch cover 120 by operating the upper handle 131. It is desirable to increase Y as the circumstances permit.

α: The angle of rotation of the lifting support bar 136 when the hatch cover 120 is completely opened

L: lifting support bar 136 total length (constant)

: 승강지지바(136)의 리브결합단(136a)에서 Q1까지의 거리,

: The distance from the rib engagement end 136a of the lifting support bar 136 to Q1,

: 승강지지바(136)의 리브결합단(136a)에서 Q2까지의 거리,

: The distance from the rib engagement end 136a of the lifting support bar 136 to Q2,

d: the length (constant) of the locking projection 113;

: Q1에서 블록(110) 내벽면까지의 거리.

: Distance from Q1 to wall in block 110

: Q2에서 블록(110) 내벽면까지의 거리.

: Distance from Q2 to wall in block 110

: Q1과 Q2 사이의 거리.

: Distance between Q1 and Q2.

: 해치커버(120)가 완전히 열렸을 때 승강자유단(136b) 끝과 블록(110) 내벽면까지의 거리.

: Distance between the end of the lifting and freeing end 136b and the wall surface in the block 110 when the hatch cover 120 is fully opened.

: 해치커버(120)가 완전히 열렸을 때 Q2에서 승강자유단(136b) 끝까지의 수평거리,

: Horizontal distance from Q2 to the end of the lift-up free end 136b when the hatch cover 120 is fully opened,

, 고정핀의 이동범위 Δx를 얻어야 한다.
With respect to the above-mentioned conditions, the vertical movement distance Y, the position of the fixing pin

, The moving range? X of the fixing pin must be obtained.

은 작을수록 사용자가 상부핸들(131) 또는 하부핸들(132)을 회전시키는데 드는 힘이 적어진다. 그러나 d보다 커야 열린다. The open condition of the hatch cover

The lower the user has to rotate the upper handle 131 or the lower handle 132. But it must be bigger than d.

.

.

The vertical maximum turning angle alpha of the lifting support bar 136 is determined by the length L of the lifting support bar 136 and the length d of the locking protrusion 113 coupled to the block 110. [

  The above open condition is rewritten as follows.

,

,

.

.

의 최대값이 결정될 수 있다.All inequalities are calculated on an equal sign, and then d is made slightly smaller by a few millimeters when actually produced. If L and d are determined, if the inequality is equaled by the above equation,

Can be determined.

,

,

.

,

,

.

과

가 결정된다.When the maximum turning angle [alpha] is determined, by the maximum lift distance Y of the lift-up coupling pipe 135

and

Is determined.

,

,

.

.

과 Q1에서 블록(110) 내벽면까지의 거리

는 최대회동각(α)와 승강결합관(135)의 최대 승강거리(Y)에 의해 결정된다.Further, the distance from Q2 to the wall surface in the block 110

And the distance from Q1 to the wall surface in the block 110

Is determined by the maximum turning angle [alpha] and the maximum lift distance (Y) of the lift-up coupling pipe (135).

,

,

.

.

는 최대회동각(α)와 승강결합관(135)의 최대 승강거리(Y)에 의해 결정된다. When the hatch cover 120 is in the locked state and in the open state, the distance between the guide bar fixing bolt 137a and the Q1 and Q2

Is determined by the maximum turning angle [alpha] and the maximum lift distance (Y) of the lift-up coupling pipe (135).

.

.

9 is an exemplary view showing an example of a sealing member 139 disposed between the vertical shaft 133 and the bushing 134. As shown in Fig.

The sealing member 139 may be an O-ring, but in some cases, a quadring as shown in FIG. 9 may be used. The quadring has four rounded protrusions in the cross-sectional shape compared to the O-ring. As a result, the friction coefficient is lower than that of the O-ring, and the wear rate is small due to a small squeeze. Since the quadring is manufactured by injection method, the burr or parting line generated during the manufacturing process does not come into contact with the sealing surface, so that the leakage phenomenon does not occur. Since the quadring acts as a seal in the entire area, the pressure load distribution is evenly formed.

The opening and closing process of the hatch cover assembly 100 of the present invention having such a configuration will be described with reference to Figs. 2 to 9. Fig.

The hatch cover 120 is kept closed on the block 110 as shown in Fig. 4 and 6, the lifting and coupling tube 135 is screwed to the lower portion of the first screw thread 133b of the vertical shaft 133. As shown in FIG. A plurality of elevating support bars 136 are arranged horizontally in parallel with the elevation coupling pipe 135. At this time, the projection insertion groove 136c of the elevation free end 136b of the elevation support bar 136 is disposed in contact with the lower portion of the locking projection 113. [ The lifting and freeing end 136b is held in contact with the locking protrusion 113 and is prevented from moving upward. Thus, the locked state can be stably maintained.

On the other hand, if the user wishes to open the hatch cover 120, the upper handle 131 or the lower handle 132 is rotated. When a user applies a force in a tangential direction to the upper handle 131 or the lower handle 132, a force corresponding to 8 times the input force is generated inside the hatch cover 120, and even under a high pressure, The hatch cover 120 can be opened with a small force.

When the upper handle 131 or the lower handle 132 is rotated, the vertical axis 133 rotates. The vertical axis 133 is rotated within the bushing 134 and rotates between the sealing members 139 formed of quad rings. The sealing force between the vertical shaft 133 and the bushing 134 can be maintained even under a high pressure by the quadring having an excellent sealing force as compared with a general O-ring.

When the vertical axis 133 is rotated, the lifting and coupling tube 135 is moved upward along the vertical axis 133 as shown in FIGS. The rib coupling end 136a of the lifting support bar 136 coupled to the coupling rib 135a of the lifting coupling pipe 135 by the link shaft 135b is lifted upward.

The elevation free end 136b of the elevation support bar 136 moves downward by the support of the elevation guide bar 137 and the elevation support bar 136 is rotated downward with respect to the link shaft 135b . The lift-up free end 136b, which is in contact with the lower portion of the lock projection 113, moves upward in the middle as the lift bar 136 is moved obliquely upward. Thus, when the hatch cover 120 is opened, the lifting and lowering free end 136b can be moved upward without being in contact with the locking protrusion 113. [

When the upper handle 131 or the lower handle 132 is rotated in the opposite direction when the opened hatch cover 120 is closed, the lift coupling pipe 135 moves downward of the vertical shaft 133, and a plurality of The lifting support bar 136 is horizontally disposed again.

As described above, the hatch cover assembly according to the present invention opens and closes the hatch cover by a plurality of lifting / lowering bars lifted up and down from the horizontal link system, which is conventionally operated in the horizontal direction.

Accordingly, when the user rotates the handle with the same force, the output torque can be 8 times that of the conventional horizontal link method, and the hatch cover can be opened and closed with a small force under high pressure.

Further, the sealing force between the vertical axis and the hatch cover can be further improved by using a quadring having an excellent sealing force as compared with the conventional O-ring.

The embodiments of the hatch cover assembly of the present invention described above are merely illustrative and those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. It will be possible. Therefore, it is to be understood that the present invention is not limited to the above-described embodiments. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims. It is also to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

100: Hatch cover assembly 110: Block
111: cover coupling arm 113: locking projection
120: hatch cover 121: block coupling arm
123: hinge shaft 125: elastic member
127: upper handle 128: lower handle
129: sealing member 130: cover opening / closing part
131: upper handle 132: lower handle
133: vertical axis 133a: handle coupling axis
133b: first screw thread 134: bushing
135: lifting coupling pipe 135a:
135b: link shaft 136: elevating support bar
136a: rib connecting end 136b: lifting free end
136c: projection insertion groove 136d: shaft movement slit
137: lift guide bar 137a: guide bar fixing bolt
139: sealing member

Claims (4)

In a hatch cover assembly,
A block coupled to the doorway;
A hatch cover openably and closably coupled to the block;
And a cover opening / closing part for opening / closing the hatch cover to / from the block,
The cover opening /
A vertical axis rotatably coupled through the hatch cover;
An upper handle and a lower handle fixedly coupled to an upper portion of the vertical axis and a lower portion of the vertical axis with respect to the hatch cover;
A bushing supporting the vertical axis to rotate within the hatch cover;
A lifting coupling pipe screwed to the vertical shaft between the lower handle and the bushing and vertically moving up and down along the vertical axis in conjunction with rotation of the upper handle and the lower handle;
The hitch cover according to any one of claims 1 to 3, wherein the hitch cover includes a lock state in which one end is linked to the outside of the lift coupling pipe and the other end is disposed in a free end state, A plurality of elevating support bars for moving up and down between the open states in which the plurality of elevating support bars are arranged;
An elevation guide bar extending downward from a lower surface of the hatch cover and coupled to one area of the elevation support bar to guide the elevation support bar up and down;
And a sealing member disposed between the bushing and the vertical shaft to improve a sealing force,
And a locking protrusion is provided on an inner wall surface of the block so as to be contacted with the other end of the elevating support bar in the locked state to maintain the locked state of the hatch cover and the block,
Wherein a guide bar fixing bolt coupled to a lower portion of the elevation guide bar is formed on the plate surface of the elevation support bar,
Wherein the sealing member is provided with a quadring having four rounded protrusions formed in a cross section,
Wherein a distance by which the guide bar fixing bolt is moved is determined by the following equation.
[Mathematical Expression]

(Where Y is the maximum lift distance of the lifting coupling pipe, and? Is the maximum turning angle of the lifting support bar, and? Is determined by the length of the lifting support bar and the length of the locking projection). delete delete delete

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