JP2003306193A - Hatch cover opening/closing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hatch cover opening/closing device that does not need a hydraulic pipe. <P>SOLUTION: This hatch cover opening/closing device having a plurality of hatch covers 3, 4 placed in line on a deck 1, moving in the vessel outboard direction and opening/closing comprises an electric motor 5 for moving the respective hatch covers 3, 4 in the opening/closing direction, a motor power transfer mechanism 6 for transferring power of the electric motor 5 to the respective hatch covers 3, 4, a lifting device 20 pushing up and lifting the hatch covers 3, 4, and an electro-hydraulic actuator 40 for driving the lifting device 20. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an opening / closing device for a side rolling type hatch cover provided on a ship.

[0002]

2. Description of the Related Art Conventionally, as an opening / closing device for a hatch cover of this type, there are a device disclosed in, for example, Japanese Patent Laid-Open No. 7-117782 and a device shown in FIG.

Explaining this, on the deck 1 of the hull, NO. 1-NO. The hatch covers 3 and 4 of 9 are provided side by side in the front-back direction. The hatch covers 3 and 4 move in the left-right direction (port side) to open and close the opening of the deck 1.

The opening / closing device for each hatch cover 3, 4 is a No. 1 for moving each hatch cover 3, 4 via a chain (not shown). 1-NO. The hydraulic motor 2 of 9 is provided so that the respective hatch covers 3 and 4 are moved toward and away from each other.

Further, there is provided a levitation device (not shown) which pushes up from the closed state of the hatch covers 3 and 4 to levitate.
This levitation device also operates hydraulically.

[0006]

However, in such a conventional hatch cover opening / closing device, no.
1-NO. Since the hydraulic piping for supplying / discharging the hydraulic oil to / from the hydraulic motor 2 of 9 and the levitation device becomes long, there is a problem that the number of outfitting steps increases.

Further, there is a problem that the operating frequency of the hydraulic pump is high because it is necessary to constantly increase the operating hydraulic pressure introduced from the hydraulic source.

Further, a large amount of hydraulic oil is required, which may cause marine pollution if the piping or the like is damaged.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a hatch cover opening / closing device that does not require hydraulic piping.

[0010]

The first invention is applied to a hatch cover opening / closing device in which a plurality of sets of hatch covers which move in the port direction and open / close are provided side by side on a deck.

An electric motor for moving each hatch cover in the opening / closing direction, a motor power transmission mechanism for transmitting the power of the electric motor to each hatch cover, a levitation device for pushing up each hatch cover to levitate, and this levitation device. An electric hydraulic actuator for driving is provided.

In a second aspect based on the first aspect, the levitation device is provided with a pair of roll-up levers that are rotated by an electric hydraulic actuator, and each roll-up lever pushes up each hatch cover during levitation, while it descends. Each roll-up lever is configured to pull each hatch cover together.

According to a third aspect of the present invention, in the first or second aspect, a pinion rotatably driven by an electric motor,
The rack is equipped with a rack that moves in mesh with the pinion, and the rack is attached to the hatch cover.

In a fourth aspect based on the first or second aspect, the motor power transmission mechanism includes a sprocket that is rotationally driven by an electric motor, and a chain that moves by engaging with the sprocket. The chain is used as a hatch cover. It is characterized by being connected.

[0015]

According to the first aspect of the present invention, each hatch cover is opened and closed by an electric motor, and is lowered and levitated by each electric hydraulic actuator to supply and discharge hydraulic oil on the deck. There is no need to install hydraulic piping, reducing the number of outfitting steps and
There is no worry of causing marine pollution by hydraulic oil.

Further, the hydraulic pump constituting the electric hydraulic actuator operates during the descent / floating drive, and it is not necessary to constantly increase the working hydraulic pressure in the hydraulic power source, which saves labor.

According to the second aspect of the invention, each hatch cover is lowered and floated through each roll-up lever.

According to the third aspect of the invention, the hatch cover is opened and closed via the rack that moves in mesh with the pinion.

According to the fourth aspect of the invention, the hatch cover is opened and closed through the chain that meshes with the sprocket and moves.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, the side rolling type hatch covers 3 and 4 move on the deck 1 of the hull in the left-right direction (port side) to open and close. A plurality of sets of hatch covers 3 and 4 are provided on the ship, and these are provided on the deck 1 side by side in the front-back direction of the hull (see FIG. 9).

An opening that is opened and closed by each hatch cover 3 and 4 is formed on the deck 1, and a pair of guide rails 7 is formed along the opening. Each hatch cover 3,
Reference numeral 4 has a plurality of wheels 8, and each wheel 8 rolls on a guide rail 7 to move in the left-right direction.

The opening / closing device for the hatch covers 3 and 4 includes an electric motor 5 for moving the hatch covers 3 and 4 in the opening / closing direction.
And a motor power transmission mechanism 6 that transmits the power of the electric motor 5 to the respective hatch covers 3 and 4.

As shown in FIG. 2, the motor power transmission mechanism 6 includes a pinion 9 which is rotationally driven by an electric motor 5 having a speed reducer, and a rack 10 which meshes with the pinion 9 and moves in the left-right direction. The rack 10 is attached to the hatch cover 3. The electric motor 5 is fixed on the deck 1 via a support plate 15. The rack 10 is fixed so as to extend to the center of the lower surface of the hatch cover 3. The hatch cover 4 is also provided with a similar motor power transmission mechanism 6.

Wiring is provided to connect the electric motor 5 to a controller (not shown), and the controller controls the opening / closing operation of the hatch cover 3 based on the operation of the operator.

The hatch cover opening / closing device drives the levitation device 20 and the levitation device 20 for bringing the hatch covers 3 and 4 into contact with each other and drawing them to the deck 1 in order to secure the closed state of the hatch covers 3 and 4. And an electric hydraulic actuator 40. The levitation devices 20 are provided in pairs so as to sandwich the abutting portions of the hatch covers 3 and 4.

As shown in FIGS. 3 and 4, the levitation device 20 includes a pair of roll-up levers 31 and 32 operated by an electric hydraulic actuator 40, and pins 41 and 42 drawn by the roll-up levers 31 and 32.
And pins 41 and 42 are fixed to the hatch covers 3 and 4, respectively.

Each roll-up lever 31, 32 has a cam portion 37, 38 which engages with each pin 41, 42, is rotatably supported by the hull via the pins 33, 34, and has a gear portion 35 meshing with each other. , 36, and interlock with each other. By rotating the roll-up levers 31 and 32 from the floating position shown by the chain double-dashed line in FIG. 4 to the descending position shown by the solid line, the cam portions 37 and 38 are lowered while approaching each other, and the hatch covers 3 are moved. , 4 are butted against each other and pulled toward the deck 1. On the other hand, in FIG.
As shown in (b) and (c), each roll-up lever 3
When the pins 1 and 32 rotate in opposite directions, the pins 41 and
42 is lifted up while being separated from each other, and the hatch covers 3 and 4 are pushed up and driven in the opening direction.

A guide rail 7 for guiding each wheel 8 is provided on the combing top 13 of the hull, and a plurality of openings 11 for dropping each wheel 8 in the closed position.
And a plurality of cleat members 12 for pulling the hatch covers 3 and 4 to the deck 1 and binding them.

As shown in FIG. 5, the combing top 13
A protrusion 18 is formed on the upper side, and a watertight packing 19 pressed against the protrusion 18 is attached to the hatch covers 3 and 4, whereby the hull opening is sealed.

As shown in FIGS. 4 and 5, the electric hydraulic actuator 40 includes a hydraulic cylinder 49 for driving the roll-up levers 31, 32. The hydraulic cylinder 49 has its cylinder tip connected to the roll-up lever 31 via an arm 66, and its rod tip has an eye bracket 6
It is connected to the roll-up lever 32 via 5. As a result, the roll-up levers 31 and 32 rotate due to the expansion and contraction of the hydraulic cylinder 49.

The electric hydraulic actuator 40 comprises a hydraulic cylinder 49, a bidirectional discharge pump 46 driven by a forward / reverse electric motor 45, and a hydraulic circuit connecting the hydraulic cylinder 49 and the pump 46. The hydraulic cylinder 49 expands and contracts by switching the direction. A valve block 57 is fixed to a side portion of the hydraulic cylinder 49, and the electric motor 45, the pump 46, the tank 56, and the like are mounted side by side on the valve block 57, and these are integrated into a unit.

FIG. 6 shows a hydraulic circuit of the electric hydraulic actuator 40. Explaining this, the pump 4
The first and second passages 51 and 52 connecting the discharge ports 6 and the chambers 47 and 48 of the hydraulic cylinder 49 are provided, and the rotation direction (discharging direction) of the pump 46 driven by the electric motor 45 is switched to the hydraulic cylinder. The expansion / contraction operation direction of 49 is switched.

Wiring is provided to connect the electric motor 45 and the controller 60, and the operation of the electric motor 45 is controlled by the controller 60. The controller 60 controls the operation of the electrohydraulic actuator 40 based on a signal from a switch 61 operated by an operator.

Operate check valves 53 and 54 are provided in the first and second passages 51 and 52, respectively. The respective operation check valves 53, 54 are opened by using the pump discharge pressure generated in the second and first passages 52, 51 as a signal pressure, and the hydraulic cylinder 49
The working fluid flowing out from the chambers 47 and 48 is returned to the suction side of the pump 46.

When the hydraulic cylinder 49 is extended, the pump 46 is rotated in the normal direction, the operating check valves 53 and 54 are opened by the pressure increase in the second passage 52, and the pump 46 is
The hydraulic oil discharged from the
The hydraulic oil of No. 7 is sucked into the pump 46 through the first passage 51.

When the hydraulic cylinder 49 is contracted, the pump 46 is rotated in the reverse direction, the operating check valves 53, 54, 55 are opened due to the pressure increase in the first passage 51, and the hydraulic oil discharged from the pump 46 is supplied to the first passage. Room 51 through 51
7, while the hydraulic oil in the chamber 48 is guided to the second passage 52.
The working fluid corresponding to the rod volume is returned to the tank 56 through the operating check valve 55.

When the load acting on the hydraulic cylinder 49 increases and the pressure in the first and second passages 51 and 52 rises above a set value, the relief valves 58 and 59 open, and the first and second passages 51 and 52 open. 52 working fluid is released to the tank 56,
The pressure in the second passages 51, 52 is prevented from rising excessively.

With the above construction, the hatch covers 3 and 4 are driven to open and close by the electric motors 5 and are driven to descend and float by the electric hydraulic actuators 40, so that the hydraulic oil is discharged onto the deck. There is no need to arrange hydraulic piping to supply and discharge, the number of outfitting work can be reduced, and there is no fear of hydraulic oil causing marine pollution.

Further, since the pump 46 of the electric hydraulic actuator 40 is configured to be operated only during the descent / floating drive, it is not necessary to constantly increase the working hydraulic pressure in the hydraulic power source, and labor can be saved.

Next, another embodiment shown in FIGS. 8 and 9 will be described. The same components as those in the above-mentioned embodiment are designated by the same reference numerals.

The motor power transmission mechanism 6 is provided with a pair of sprockets 79 which are rotationally driven by an electric motor 75 having a speed reducer, and a chain 78 which moves by meshing with each of the sprockets 79. The chain 78 is arranged along the guide rollers and the like, and the chain 78 is connected to the hatch covers 3 and 4. The electric motor 75 is fixed on the deck 1 via the support plate 74. The hatch cover 4 is also provided with a similar motor power transmission mechanism 6.

In this case, when the electric motor 75 rotates in one direction, the hatch covers 3 and 4 move in the opening direction,
By rotating the other side, the hatch covers 3 and 4 move in the opening direction.

It is obvious that the present invention is not limited to the above-mentioned embodiments and various modifications can be made within the scope of the technical idea thereof.

[Brief description of drawings]

FIG. 1 is a perspective view of a hatch cover opening / closing device according to an embodiment of the present invention.

FIG. 2 is a perspective view of a motor power transmission mechanism and the like.

FIG. 3 is a perspective view of a levitation device and the like.

FIG. 4 is a front view of a levitation device and the like.

5 is a sectional view taken along the line AA of FIG.

FIG. 6 is a hydraulic circuit diagram of the electric hydraulic actuator.

FIG. 7 is an explanatory diagram showing a manner in which the levitation device similarly operates to levitate.

FIG. 8 is a perspective view of a hatch cover opening / closing device according to another embodiment.

FIG. 9 is a perspective view of a motor power transmission mechanism and the like.

FIG. 10 is a schematic plan view of a hull showing a conventional example.

[Explanation of symbols]

1 deck 3,4 hatch cover 5 electric motor 6 Motor power transmission mechanism 7 Guide rail 9 pinion 10 racks 20 Levitation device 40 Electric hydraulic actuator 49 hydraulic cylinder 45 electric motor 46 pumps

Continued front page    (72) Inventor Takao Uchikawa             1-15-1 Kaigan, Minato-ku, Tokyo Suzuebe             Medium Kayaba McGregor Stock Association             In-house

Claims (4)

[Claims] 1. A hatch cover opening / closing device in which a plurality of sets of hatch covers that move in the port direction to open and close the openings are provided side by side on a deck, and an electric motor that moves each hatch cover in the opening / closing direction. An opening / closing device for a hatch cover, comprising: a motor power transmission mechanism for transmitting the power of each of the hatch covers to each hatch cover; a levitation device that pushes up each hatch cover to float; and an electric hydraulic actuator that drives each levitation device. 2. The levitation device includes a pair of roll-up levers that are rotated by the electric hydraulic actuator,
The opening / closing device for a hatch cover according to claim 1, wherein each roll-up lever pushes up each hatch cover when ascending, and each roll-up lever pulls up each hatch cover when descending. 3. The motor power transmission mechanism includes a pinion that is rotationally driven by the electric motor, and a rack that moves in mesh with the pinion, and the rack is attached to the hatch cover. The hatch cover opening / closing device according to 1 or 2. 4. The motor power transmission mechanism includes a sprocket that is rotationally driven by the electric motor, and a chain that moves by engaging with the sprocket, and the chain is connected to the hatch cover. Alternatively, the hatch cover opening / closing device described in 2.