JP4450740B2 - Hatch cover opening and closing device - Google Patents

Description

  The present invention relates to an improvement in a hatch cover opening / closing device that waterproofly closes a hatch opening of a ship.

  Conventionally, as hatch covers that waterproofly close the hatch openings of the ship, hatch covers 3... 3 that are seated and fixed to the hatch coaming 2 a of the hatch openings 2 provided on the deck of the hull 1 are provided on the hatch sides as shown in FIG. In addition, it is widely known that the remote controller 4 is opened and closed by reciprocating in the ship's hull direction or bow / stern direction (in the illustrated example, the hull direction) (Patent Document 1).

  As shown schematically in FIG. 10, the hatch cover moving device operated by these remote controllers 4 uses a hydraulic motor 41 as a drive source, and a pair of sprockets 43, 43 are coaxially fixed to a rotating shaft 42. Chains 44 and 44 are respectively wound around, and the chain 44 is stretched around the periphery of the hatch opening 2 by an idler sprocket 47 provided around the hatch opening 2 and a guide pulley 48... And a connecting member 49 provided on the hatch cover 3. 49, the hatch covers 3 and 3 are configured to move away from or close to each other as indicated by arrows.

On the other hand, the hatch covers 3 and 3 need to securely close the hatch opening. When the hatch covers are closed, the hatch covers 3 and 3 are seated on the upper surface 2b of the hatch combing 2a as shown in FIG. It is structured to be fastened and fixed.
Therefore, when the hatch covers 3 and 3 are moved to open and close, it is necessary to remove the fastener 6 and to float the hatch covers 3 and 3 until they are sufficiently separated from the upper surface 2b of the hatch combing 2a. On the side, a levitating and sinking device 7 is provided.

As shown in FIG. 11, the levitation / sink device 7 is provided in a notch 8a of the guide rail 8 on which the traveling roller 3a of the hatch cover 3 travels. It is configured to be driven up and down by switching, pressurizing and depressurizing, etc., and as shown by the dotted line in FIG. 11, the roller 3 a can be lifted to the same level as the guide rail 8 to move to the guide rail 8, and the guide rail can be moved in the sinking stroke. The roller 3a, which was at the same level as 8, was lowered and lowered into the notch 8a so that the hatch cover 3 was seated on the hatch combing 2a (Patent Document 2).
Description of JP 2003-306193 A, paragraph 0021 and FIG. Japanese Patent Laid-Open No. 6-179391, paragraphs 0011 and description of FIGS. 1 and 2

  However, in such a conventional apparatus, the levitating / sinking apparatus 7 has the same number as the number of rollers 3a of the hatch cover 3 for each hatch, that is, usually four places per one hatch cover 3, and the hatch cover 3 is one. Since it is arranged so as to abut two pieces per opening, at least eight places are required for one hatch opening, and the hydraulic drive devices 41 and 71 and the hydraulic oil for supplying / exhausting hydraulic oil to these are provided as the number of hatch openings increases. There was a problem that the number of outfitting processes such as hydraulic piping increased greatly.

  In addition, since it is necessary to constantly increase the hydraulic pressure derived from the hydraulic power source, there is a problem in that the hydraulic pump is frequently operated and the running cost is increased.

  In addition, a large amount of hydraulic oil was required, and there was a concern of causing marine pollution in the event of damage to piping or the like.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a hatch cover opening / closing device that eliminates the need for hydraulic piping and can easily realize opening / closing control with a simple structure.

  In order to achieve the above object, a hatch cover opening and closing device according to the present invention is a hatch cover for closing a hatch opening, and is seated and fixed on the hatch combing when closed, and is lifted from the hatch combing by a floating and sinking device when opening and closing. In the hatch cover that can be opened and closed by moving it in the ship width direction or the bow-stern direction, the drive source of the device that raises and lowers the hatch cover is an electric motor, and is driven by this electric motor. The levitation / sink device is provided with a stopper for limiting the levitation upper limit position and the sag lower limit position of the hatch cover, and the electric motor is provided with a current detection circuit for detecting an increase in current that occurs when the drive is limited by the stopper. Stop the rising and sinking of the electric motor by detection Characterized in that was.

  In the above, the drive source of the apparatus for moving the hatch cover levitated from the hatch coaming in the ship width direction or the bow-stern direction is an electric motor, and stoppers are provided at the open position and the closed position of the hatch cover driven by the electric motor. The electric motor may be provided with a current detection circuit for detecting an increase in current that occurs when the drive is limited by the stopper, and the movement of the electric motor may be stopped by this current detection.

  The stop of the electric motor by the overcurrent detection circuit can be performed by a drive power supply cutoff circuit that can be reset in both the floating and sinking device and the moving device.

  Note that the amount of overcurrent detected by this overcurrent detection circuit is less than the overcurrent set in the safety device that detects normal overcurrent, and excessive stress is generated in the electric motor and the mechanism attached thereto. It can be set as the structure which prevents.

  The hatch cover levitation / sink drive device is a screw feed mechanism comprising a combination of a screw shaft that is rotationally driven by an electric motor and a screw piece that is screw-fitted to the screw shaft, and the hatch cover in the mechanism is moved up and down. A structure in which stoppers are disposed at the upper limit position and the lower limit position with respect to the element member, or a drive screw shaft provided coaxially with the rotation shaft of the electric motor, and a worm that rotates in mesh with the outer periphery of the screw shaft A gear and a driven screw shaft that is formed in the center hole of the worm gear and is screwed into the screw hole so that the hatch cover is moved up and down by the axial movement of the driven screw shaft. I can do it. And when it is set as the mechanism which consists of a combination of a screw shaft and a screw piece fitted to this as mentioned above, each screw fitting part can also be made into a ball screw mechanism.

  Moreover, durability can also be improved by making each element | child element which comprises said levitation / sink apparatus the intensity | strength which can endure the load at the time of the drive limitation of the electric motor by the said stopper.

  In the hatch cover ascent and descent drive device, each element is provided by a mechanism member that moves in the ascending and descending direction as a bracket that comes into contact with the lower edge of the hatch cover, and by providing stoppers at the ascending upper limit position and the descending lower limit position of the bracket. It is possible to prevent excessive force from being applied to the element. Further, a part of the guide member of the hatch cover moving roll is cut out, the bracket is arranged in the cutout part so as to be able to protrude and retract, and the upper surface of the bracket is provided so as to contact the lower surface of the moving roll, and The guide surface of the guide member and the upper surface of the bracket may be substantially flush with each other at the upper limit position of the bracket.

  In addition, the moving device of the hatch cover in the ship width direction or the bow-stern direction includes an electric winch provided with a speed reduction mechanism, a pair of two sprockets coaxially provided on the output rotation shaft of the speed reduction mechanism, and each of the sprockets. Corresponding to the hatch combing side, a chain-like wrapping conductive member stretched between the sprockets along the moving direction of the hatch cover, and the forward movement of the conductive member. It can also be a connecting member for the hatch cover provided on each of the side and the return side, and the traveling control of the moving device in the ship width direction or the bow-stern direction of the hatch cover can also be an inverter control system. .

  Both the hatch cover moving device and the levitating / sinking device may be driven by an electric motor, and the respective operations when the hatch cover is opened and closed can be remotely and automatically operated.

  According to the present invention, since the driving of the raising and lowering of each hatch cover is performed by an electric motor, it is not necessary to provide hydraulic piping for supplying and discharging hydraulic oil in the case of a hydraulic motor, and the number of outfitting processes can be reduced. There is no worry of causing marine pollution by hydraulic oil.

  In addition, the control of each electric motor that drives the levitating / sinking device and the moving device is performed based on the overcurrent generated with the increase in the load of the electric motor. For example, a hatch cover such as a limit switch or a photoelectric tube is used. Therefore, it is not necessary to provide a detection device or a detection circuit necessary for the position control during the levitation and movement, and the levitation and sag device can be provided at a very low cost.

  In addition, by using a drive power cutoff circuit that can reset the stop control of the electric motor of the levitation / sink device or the moving device, it can also serve as a safety device for the entire device and can be provided at a lower cost.

  Further, if the overcurrent detected at this time is set to the minimum necessary level, an excessive stress is not generated in the mechanism portion.

  In addition, various types of screw mechanisms comprising a combination of a screw shaft and a screw piece that is screw-fitted to the screw shaft can be used as the levitating and sinking device. By doing so, precise operation can be performed more smoothly without backlash.

  If the mechanical strength such as bending strength and compressive strength on the structure of this mechanism is set to a strength that can withstand the load when the drive of the electric motor is limited, the serviceable strength of the device will increase and the above-mentioned overcurrent will be detected. In addition to the adjustment of the amount of current, the durability of the mechanism can be further improved.

  In addition, if the hatch cover opening and closing device is also an electric motor, subtle speed adjustment can be easily performed by inverter control.For example, the opening and closing movement speed at the beginning or end of the opening and closing operation can be reduced. Control is easily possible. In addition, these operations can be remotely and automatically operated, so that labor can be saved when the hatch cover is opened and closed.

.

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

  1 is a side view of a floating and sinking apparatus for a hatch cover according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line XX in FIG. 1, and FIG. FIG. 4 is a control circuit diagram of the opening / closing device for a hatch cover according to the present invention, and FIG. 5 is a flowchart of the floating and sinking device.

The structure of the hatch opening and the hatch cover of the present invention is the same as that of the conventional structure shown in FIGS. 9 to 11, and the hatch covers 3 and 3 are provided around the hatch opening when closed as shown in FIG. It is the same in that it is seated on the upper surface of the hatched combing and tightened with a tightening tool, and at the time of opening, the tightening tool is removed and then lifted from the hatching combing by a rising and sinking device and moved in the opening direction or the closing direction.
The difference of the hatch cover levitating / sinking device of the present invention from the prior art is the driving device and its control device, which will be described below.

  As shown in FIGS. 1 and 2, the hatch cover levitation / sink device 7 is provided below the notch portion 8 a in which the guide rail 8 is notched corresponding to the stop positions of the rollers 3 a provided on the hatch cover 3. ing.

  As shown in FIG. 1, each levitation / sink device 7 is installed on a base 11 provided below a notch 8 a of the guide rail 8.

  An electric motor 70 is fixed on the base 11. The electric motor 70 is provided with a screw feed mechanism 72 that converts rotational motion into linear motion via a speed reduction mechanism 75. As shown in FIG. 2 as an example of the structure, the screw feed mechanism 72 rotates in mesh with a screw shaft 72a connected to the output side of the speed reduction mechanism 75 and is rotatably supported by a frame 72d. It is formed in the central hole of the gear 72b so that it is screwed into the screw hole and, as indicated by the arrow, comprises a driven screw shaft 72c supported so that it can move in the axial direction but cannot rotate around the shaft. Brackets 73 that come into contact with the roller 3a and raise and lower the hatch cover 3 are fixed to the screw shaft 72c so as not to freely rotate with each other.

  In this bracket 73, the width of the upper edge 73a is set to fit into the notch 8a of the guide rail 8, and the side surface is fitted to the guide strip 11a formed on the inner surface of the notch 8a. Yes. Therefore, the driven screw shaft 72c is supported so as not to rotate by the bracket 73 fitted to the guide strip 11a, and is raised until it is flush with the guide rail 8.

  The bracket 73 has laterally extending portions 73b and 73b formed at the base.

  Stoppers 12a and 12a are provided on the inner surface of the cutout portion 8a so as to abut against the overhang portions 73b and 73b. The upper and lower limit positions of the bracket 73 are regulated by the stoppers 12a and 12a.

  Further, in the above description, the levitating / sinking device 7 is configured to be operated by the screw feed mechanism 72, so that the bracket 73 does not naturally descend due to the weight of the hatch cover 3 when the electric motor 70 is stopped.

  In addition, it is good also as a structure which inserts the disk-spring-shaped buffer member 13 ... between the overhang | projection parts 73b and 73b and the stoppers 12a and 12b like the other structural example of FIG.

  In such a configuration, the pressure contact state between the bracket 73 and the stopper 12a is relieved by the elasticity of the disc spring, so that an impact force is prevented from acting on the electric motor 70, the speed reduction mechanism 75, and the like. The cushioning material 13 may be a helical spring or a leaf spring in addition to the disc spring as shown.

  The configuration example shown in FIG. 3 is different from the configuration example shown in FIG. 1 in that a spacer 73c is inserted between the bracket 73 and the driven screw shaft 72c, and projecting portions 73b and 73b are provided on the spacer 73c. The point is that a disc spring 13a is interposed between the overhanging portion 73b and the stopper 12a. Since other structures are the same as those shown in FIGS. 1 and 2, the same or corresponding parts are denoted by the same reference numerals, and detailed description thereof is omitted.

  The screw feed mechanism 72 shown in FIGS. 1 to 3 may be a screw feed mechanism using a so-called ball screw. In addition to very low frictional resistance, backlash can be eliminated and rapid control becomes possible.

  2 denotes a seal rubber provided along the periphery of the lower edge of the hatch cover 3, and a protrusion 2c is provided on the upper surface 2b of the hatch combing 2a so that the hatch cover 3 is placed on the hatch combing 2a. When seated, the protrusion 2c bites into the seal rubber 5 so as to be waterproof. Therefore, if the fastening member 6 such as a bolt or a lever-type fastener is fixed to the hatch combing 2a, the hatch opening is waterproofed.

  In FIG. 1, reference numeral 76 denotes a junction box attached to the electric motor 70, which is provided to protect a connecting portion of a circuit between the power supply circuit 20 and the electric motor 70, which will be described later, from water wetting and salt damage. .

  Although illustration of the internal structure is omitted, the junction box 76 is a downward-opening container made of a corrosion-resistant metal or the like, and has a structure in which the bottom is watertightly closed. The bottom surface is sealed with a resin plate through which the electric wire penetrates and, if necessary, a rubber plate, and the interior of the lid plate is completely protected by water-tightly sealing the through portion of the electric wire with resin. It is configured.

  Next, drive power supply circuits of the electric motors 70 provided in a plurality along the hatch combing 2a will be described.

As shown in FIG. 4, the power supply circuit 20 of each electric motor 70 is provided with an overcurrent detection circuit 21 for the electric motor 70. The overcurrent detection circuit 21 is for detecting an overcurrent generated when the operation of the electric motor 70 is restricted, and the bracket 73 moved up and down by the electric motor 70 is in contact with the stoppers 12a and 12b. The detection element 21a that forms the overcurrent detection circuit 21 and the circuit 21b that outputs a signal are the same as a conventional overcurrent detection circuit that is used as a safety device. However, it is set to a value lower than the overcurrent detection value provided for the safe operation of the conventional electric motor 70.

  For example, if the detection current set value of the conventional overcurrent detection circuit is increased by 15 to 20% from the steady current, the detection operation is set at a lower current amount by 10 to 15%. Yes. By doing so, the load applied to each mechanism at the time of stopping can be reduced.

  Since the current value set in this way is usually smaller than the inrush current at the start of driving of the electric motor 70, the detection of this circuit is started so that this is not detected at the start of driving. The time is adjusted with a timer (not shown). Needless to say, the set value is larger than the overcurrent that is constantly generated in the electric motor 70 based on the movement resistance of the hatch cover 3 during the opening / closing movement operation.

  A circuit 22 is provided that automatically shuts off the motor drive power in response to an overcurrent detection signal from the circuit 21b. The power cut-off circuit 22 is a breaker (not shown) or the like, and can be reset manually or automatically at the next power-on after the cut-off.

  On the other hand, the control circuit is provided with a check circuit 23 for checking whether or not all the levitation electric motors 70 are stopped, so that a command to contact the switch 24 of the check circuit 23 is issued from the circuit 21b. .

  In the check circuit 23, if all the switches 24 are closed, the end of the hatch cover lifting / lowering process can be visually discriminated by the circuit 25 by, for example, a pilot lamp (not shown), and the moving device for the hatch cover 3 to be described later The drive control is made.

  In FIG. 4, reference numeral 25 denotes a main power switch, and power is supplied from the ship power supply.

  Next, the operation of the levitation / sink device 7 will be described. FIG. 5 is a flowchart showing the operation of the levitating and sinking device 7.

  As a precondition for opening and closing the hatch, it is a condition that all the floating and sinking devices provided in the hatch to be opened and closed are normal and the moving device of the hatch cover is stopped.

  A hatch to be opened and closed is selected from a plurality of hatches arranged on the deck, and the operation switch of the floating and sinking device 7 of the hatch is turned ON. As a result, the electric motor 70 is driven to rotate in a direction selected from either the flying or sinking direction. Immediately after this rotational driving, it is checked whether or not the overcurrent detection circuit is operating normally. If it is normal, the ascending or descending process is continued until the bracket 73 shown in FIG. 1 contacts the stoppers 12a and 12b.

  If the overcurrent detection circuit 21 is abnormal, the entire apparatus is once stopped and checked until the abnormality is recovered. When the abnormality is recovered, the rising and sinking operation is started again from the beginning.

  When the bracket 73 comes into contact with the stopper 12, an overcurrent flows through the electric motor 70 due to an increase in driving resistance. When the value of the overcurrent exceeds a certain value, the power shutoff circuit 22 (same as above) is actuated based on the signal from the detection circuit 21 (FIG. 4) to shut off the power, and each of the plurality of electric motors 70 is sequentially stopped. Go. Then, if all the switches 24 (same) of the check circuit 23 (same) are closed, it is determined that the ascent or sink process has been completed, and for example, a lamp indicating completion of the ascent or sink operation is turned on.

  Since the cutoff circuit 22 can be reset, the power supply is normally started again by the next switch ON.

  In the above, since the overcurrent detection value is set lower than the overcurrent detection value at the time of abnormality, the power supply is quickly shut down when the bracket 73 contacts the stopper 12. Therefore, an excessive load is not applied to the transmission mechanism for transmitting force from the electric motor 70 to the bracket 73, and the electric motor 70 can be operated safely without applying an excessive electric load.

Next, the moving device 4 that causes the hatch cover 3 to travel in the opening / closing direction will be described.
As shown in FIG. 6, the moving device 4 of the hatch cover uses an electric motor 40 as a driving source, and further a reduction gear 45 directly connected to the electric motor 40, and further uses an overcurrent detection circuit as its control device. The other points are the same as the moving apparatus shown in FIG.

  That is, as shown in FIG. 6, a pair of drive sprockets 43, 43 coaxially provided on the output side of the speed reducer 45, and corresponding to each of the drive sprockets 43, 43, are provided on the side of the hatch combing 2a. The idle sprockets 47, 47, the guide pulleys 48... 48 provided between the sprockets 43, 47, and the sprockets 43, 47 and the guide pulley 48 along the moving direction of the hatch covers 3, 3 (arrow A). A chain-like wrapping conductive member 44, 44 stretched between and a connecting member 49, 49 for the hatch covers 3, 3 provided on the forward side and the reverse side of the conductive member 44, 44, It is composed of

  The rotation speed of the motor in the above is about 1800 rpm, which is reduced to about 1/90 to 1/100 by the speed reducer 45, and the traction speed of the chain-like winding conductive member 44 is about 100 m / min. It has been adjusted to be.

  In the configuration of the wrapping conductive members 44 and 44, only a portion that contacts the sprockets 43 and 47 may be a chain, and the other portion may be a wire, or the whole may be a uniform chain.

  In addition, the winding conduction members 44 and 44 and the hatch covers 3 and 3 are connected, for example, when the illustrated rotary shaft output shaft 46 rotates in the direction of arrow R and the hatch covers 3 and 3 move in the opening direction. The hatch covers 3 and 3 are connected via connecting members 49 and 49 to the side where the conductive members 44 and 44 move in the direction in which the hatch covers 3 and 3 are opened apart from each other. When the opened hatch covers 3 and 3 are closed, the rotation output rotation shaft 46 is rotated in the direction opposite to the arrow R by rotating the electric motor 40 in the reverse direction.

  Further, stoppers 9 and 9 are provided at the end portions of the hatch covers 3 and 3 in the moving direction, and the overcurrent detection circuit 21 of the electric motor 40 when the hatch covers 3 and 3 come into contact with the stoppers 9 and 9 is shown in FIG. 7 is provided in the power supply circuit.

  Reference numeral 30 in the figure denotes an inverter circuit 30 that is used as a driving power source for the electric motor 40. It is desirable to adopt an inverter system because the electric motor 40 can be easily controlled.

An overcurrent detection circuit 21 is provided in this power supply circuit. In addition, since the structure of the overcurrent detection circuit 21, the element which comprises these, a power supply cutoff circuit, etc. is the same as that of the above-mentioned levitation apparatus, detailed description is abbreviate | omitted by attaching | subjecting the same code | symbol.
The electric motor 40 can be operated by the controller 4.
Next, the operation of moving the hatch cover in the above embodiment will be described.

  FIG. 8 is a flowchart showing the operation of this moving apparatus.

  The following is assumed to move the hatch cover 3. That is, (1) the hatch cover 3 is lifted so that the roller 3a can move to the guide rail 8a, (2) the floating and sinking device 7 is stopped, and (3) the drive motor for the hatch cover. (4) If an inverter circuit is provided, the circuit must be normal.

  Of the above, the first two (1) and (2) are determined by whether all the switches 24 of the check circuit 23 are closed.

  At this time, the roller 3a is at the same level as the guide rail 8 and the hatch cover 3 can freely travel on the guide rail 8. However, the hatch cover 3 conducts on the side of the chain of the moving device 4 and the like. Since it is fixed to the member 44, even if the hull is listed or has a large trim, it will not run naturally in the inclined direction.

  Next, the controller 10 is operated to drive the electric motor 40 of the moving device 4 to move the hatch cover 3 in the opening direction and open the hatch 2.

  When the hatch cover 3 moves in the opening direction and comes into contact with the stopper 9, the power supply is shut off by the overcurrent detection circuit 21, the opening movement of the hatch cover 3 is stopped, and then the notch portion of the rail provided at the opening position The rollers 3a are moved down to 8a by the sinking device 7 to fix the hatch cover 3 so as not to move.

  When closing the hatch 2, the roller 3 a is supported and lifted from the notch 8 a, and the hatch cover 3 is lifted to the same level as the guide rail 8, and then the controller 10 is operated to reverse the above. Then, the electric motor 40 of the moving device 4 is driven to move the hatch cover 3 in the closing direction until the roller 3a reaches the notch portion 8a of the guide rail 8 to close the hatch 2, and at this time, it contacts the stopper 9 By detecting an overcurrent generated when the movement of the hatch cover 3 is restricted, the power supply of the power supply motor 40 is shut off and stopped, and then the levitating and sinking device 7 is operated in the sinking direction. In this case, when the descending bracket 73 comes into contact with the stopper 12, an overcurrent generated in the electric motor 70 is detected thereby, and based on this, the power is cut off and the electric motor 70 stops. When the fastener 6 is tightened, the hatch cover 3 is waterproofly seated on the hatch coaming 2a with the ridge 2c biting into the seal rubber 5.

  Therefore, the control circuit for moving the hatch cover 3 in the rising / lowering direction and the opening / closing direction can be greatly simplified, and the operation can be ensured.

  Although the case where the screw feed mechanism 72 is provided in two stages as the screw feed mechanism 72 in the levitating and sinking device of the hatch cover 3 of the above embodiment, the screw feed mechanism shown in FIG. It is good also as a structure which floats and sinks the bracket 73 by comprising so that the axis | shaft 72c may become the rotating shaft 72a of the reduction gear 75 directly. In this case, the screw shaft 72a is supported upright.

  Further, the stoppers 12a and 12b, the bracket 73, and the constituent members of the mechanisms 72 and 75 that conduct the force to the bracket 73 in the floating and sinking device of the hatch cover 3 in the above embodiment are made of the stoppers 12a and 12b and the bracket 73. It is desirable to form a material having excellent strength such as high-strength steel so that it can withstand the force applied from the electric motor 70 until the electric motor 70 stops after the contact.

  Further, the screw feed mechanism 72 may be a ball screw mechanism although not shown. In this case, since the operating resistance of the mechanism can be made very small and the backlash can be made very small, the control of the floating and sinking operation of the hatch cover 3 can be performed easily and accurately.

In addition, the drive system of the moving device 4 of the hatch cover 3 in the hatch cover opening / closing device of the above embodiment can be an inverter control method, and in this case, the increase / decrease control of the moving speed is facilitated, especially when the hatch opening starts. And it becomes easy to perform deceleration adjustment near the end of closing. In this case, a check circuit for checking whether or not the inverter is normal is added to the control program as shown by a portion surrounded by a dotted line in FIG.
Further, in the case of inverter control, since a regenerative brake circuit can be provided, it is possible to easily perform speed adjustment of the hatch cover or emergency stop when the trim or wrist is large, and the safety can be increased.

  In the above embodiment, when all the drive sources of the hatch cover levitating / sinking device 7 and the moving device 4 are electric motors, these drives can be remotely controlled by electrical wiring, for example, by monitoring from a bridge. This makes it possible to achieve significant labor savings such as opening / closing control of all hatch openings.

It is a principal part side view of the floating and sinking apparatus in the opening / closing apparatus of the hatch cover of this invention. FIG. 2 is a cross-sectional view taken along line XX in FIG. 1. It is principal part sectional drawing of the other structural example of the levitation-sink apparatus in the opening / closing apparatus of the hatch cover of this invention. FIG. 2 is a circuit diagram of the rising and sinking device shown in FIG. 1. It is an operation | movement flowchart of the levitation-sink apparatus shown in FIG. It is a principal part perspective view of the moving apparatus in the opening / closing apparatus of the hatch cover of this invention. It is a circuit diagram of the moving apparatus shown in FIG. It is an operation | movement flowchart of the moving apparatus shown in FIG. It is a top view which shows the hatch of a hull deck. It is a principal part perspective view explaining the moving apparatus of the conventional hatch cover. It is a principal part side view explaining the conventional raising / lowering apparatus of a hatch cover.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Hull 2 ... Hatch opening 2a ... Hatch combing 3 ... Hatch cover 3a ... Roller 4 ... Moving device 7 ... Levitation device 9 ... Stopper 12a ... Stopper 12b ... Stopper 20 ... Power supply circuit 21 ... Overcurrent detection circuit 22 ... Power supply interruption Circuit 30 ... Inverter circuit 40 ... Electric motor 45 ... Reducer 70 ... Electric motor

Claims (13)

  A hatch cover that closes the hatch opening, is seated and fixed on the hatch combing when closed, and is opened and closed by being lifted from the hatch combing by a levitation subsidence device and moved by a moving device in the ship width direction or the bow-stern direction. In the movable hatch cover, the drive source of the device for levitating and sinking the hatch cover is an electric motor, and the levitating / sinking device driven by this electric motor restricts the upper and lower lower limit positions of the hatch cover. The electric motor is provided with a current detection circuit that detects an increase in current that occurs when the drive is limited by the stopper, and the current detection detects that the driving of the electric motor is suspended. A hatch cover opening and closing device.   The drive source of the device for moving the hatch cover levitated from the hatch combing in the ship width direction or the bow-stern direction is an electric motor, and stoppers are provided at the opening position and the closing position of the hatch cover driven by this electric motor, respectively. 2. The electric motor according to claim 1, further comprising a current detection circuit that detects an increase in current that occurs when the drive is limited by the stopper, and the electric motor is stopped from being driven by this current detection. Hatch cover opening and closing device.   The hatch cover opening and closing device according to claim 1 or 2, wherein the drive of the electric motor is stopped by a resettable drive power supply cutoff circuit.   The opening / closing device for a hatch cover according to any one of claims 1 to 3, wherein an amount of overcurrent detected by an overcurrent detection circuit of the electric motor is smaller than an overcurrent set in a normal overcurrent detection safety device. .   The hatch cover levitation / sink drive device is a screw feed mechanism comprising a combination of a screw shaft that is rotationally driven by an electric motor and a screw piece that is screw-fitted to the screw shaft, and the hatch cover in the mechanism is moved up and down. The opening / closing device for a hatch cover according to any one of claims 1 to 4, wherein a stopper is disposed at the rising upper limit position and the settlement lower limit position for the element member to be moved. The hatch cover levitation / sink drive device is formed in the drive screw shaft formed coaxially with the rotation shaft of the electric motor, the worm gear rotated in mesh with the outer periphery of the screw shaft, and the central hole of the worm gear. The hatch cover opening / closing device according to any one of claims 1 to 4 , further comprising a driven screw shaft that is screw-fitted into the screw hole, wherein the hatch cover is moved up and down by an axial movement of the driven screw shaft. In levitation Settlement drive of the hatch cover, according to claim 5, the screw engaging portion is a ball screw mechanism of the feed screw mechanism consisting of a combination of the screw piece that fits to said screw shaft Hatch cover opening and closing device.   The hatch cover opening / closing device according to any one of claims 1 to 7, wherein each element of a mechanism constituting the hatch cover floating and sinking device has a strength capable of withstanding a load when the electric motor is restricted by the stopper.   In the hatch cover floating / sink drive device, the element member that moves in the floating and sinking direction is a bracket that contacts the lower edge of the hatch cover, and stoppers are provided at the floating upper limit position and the lower limit lower position of the bracket. The opening / closing apparatus of the hatch cover in any one of Claims 1-8. A part of the guide member of the moving roller of the hatch cover is cut out, the bracket is arranged in the cutout part so as to be able to protrude and retract, and the upper surface of the bracket is provided so as to contact the lower surface of the moving roller , and The hatch cover opening and closing device according to claim 9, wherein a guide surface of the guide member and an upper surface of the bracket are substantially flush with each other at an upper limit position of the bracket.   The moving device of the hatch cover in the ship width direction or the bow-stern direction includes an electric winch provided with a speed reduction mechanism, a pair of two sprockets provided coaxially with an output rotation shaft of the speed reduction mechanism, and each of the sprockets Corresponding to the hatching combing side, a winding conductive member that is circulated between the sprockets so as to reciprocate along the moving direction of the hatch cover, and The hatch cover opening and closing device according to any one of claims 1 to 10, further comprising a connecting member for the hatch cover provided on each of the forward side and the reverse side.   The hatch cover opening / closing device according to any one of claims 1 to 11, wherein travel control of the moving device of the hatch cover in a ship width direction or a bow / tail direction is an inverter control system.   Both the moving device of the hatch cover in the width direction or the stern direction and the rising and sinking device are driven by an electric motor, and each operation when opening and closing the hatch cover can be remotely and automatically operated. The hatch cover opening and closing device according to claim 1.

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