Hatch cover opening / closing device

Abstract

To provide a hatch cover opening / closing device capable of successfully guiding an endless chain part to a gear part connected to a hatch panel constituting the hatch cover.SOLUTION: A hatch cover opening / closing device 10 which is the device to open / close a hold by sliding multiple hatch panels comprises an endless chain part 11 connected to multiple hatch panels to slide the multiple hatch panels, a driving chain wheel part 12 to output the driving force for moving the endless chain part 11, a driven chain wheel part 14 to guide the endless chain part 11 by the driving force of the driving chain wheel part 12, a mounting part 12c to mount the endless chain part 11, and a guiding part 12d to guide the movement to the endless chain part 11.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an opening and closing device for a hatch cover. [Background technology]

[0002] Conventionally, a hatch is a general term for an opening provided for loading or unloading cargo into a ship's hold, and there are hatch covers for opening and closing these hatches. As technology related to the present invention, for example, Patent Document 1 discloses hatch covers for cargo ships such as bulk carriers, including a two-panel side-rolling type that moves to open and close in both directions around the centerline of the hull, a one-panel side-rolling type that straddles the center of the hull, and an end-rolling type that opens and closes with one or two panels in the bow and stern directions of the ship, and which are characterized by having a link mechanism for opening and closing. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-68852 Summary of the Invention [Problem to be solved by the invention]

[0004] Conventional hatch cover opening and closing mechanisms have the problem that the chain connected to the hatch cover cannot be properly guided to the gear that drives the chain, and can become tangled near the gear.

[0005] An object of the present invention is to provide a hatch cover opening / closing device that can effectively guide an endless chain portion connected to a hatch panel that constitutes a hatch cover to a gear portion. [Means for solving the problem]

[0006] The hatch cover opening and closing device of the present invention is a hatch cover opening and closing device that slides and stores multiple hatch panels in sequence to open a hold, and slides and unfolds the multiple hatch panels in sequence to close the hold, and is characterized in that it has an endless chain section connected to the multiple hatch panels to slide the multiple hatch panels, a drive chain wheel section that outputs a driving force to move the endless chain section, a driven chain wheel section for guiding the movement of the endless chain section by the driving force of the drive chain wheel section, and the drive chain wheel section has a gear section that meshes with the endless chain section, a placing section that is arranged in front of the gear section at a predetermined distance and on which the endless chain section is placed to guide the endless chain section to the gear section, and a guide section that extends from the placing section to the outer periphery of the gear section and guides the movement of the endless chain section.

[0007] In addition, in the hatch cover opening and closing device according to the present invention, it is preferable that the guide portion has a shape that follows the outer periphery of the gear portion so as to guide the endless chain portion to the top of the gear portion. [Effects of the Invention]

[0008] According to the present invention, the endless chain portion connected to the hatch panel that constitutes the hatch cover can be smoothly guided to the gear portion. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a diagram showing an opening and closing device for a hatch cover according to an embodiment of the present invention. [Figure 2] FIG. 1 is a diagram showing a hatch cover opening and closing device according to the prior art. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following, similar elements in all drawings will be designated by the same reference numerals, and duplicate explanations will be omitted. Furthermore, in the description below, previously described reference numerals will be used as necessary.

[0011] Fig. 1 is a diagram showing a hatch cover opening / closing device 10 according to an embodiment of the present invention. Fig. 1(a) is a diagram showing the overall configuration of the hatch cover opening / closing device 10, and Fig. 1(b) is a side view of a drive chain wheel unit 12.

[0012] FIG. 1(c) is a view showing the drive chain wheel portion 12 as seen from the gear portion 12a side, and FIG. 1(d) is a top view of the drive chain wheel portion 12. As shown in FIG.

[0013] A cargo ship is a vessel that primarily transports cargo, and is equipped with hatch covers for opening and closing hatches, which are openings for loading and unloading cargo into the hold. In the example shown in Figure 1, we will explain the case as being a so-called Pontoise-type hatch cover (FV-type hatch cover).

[0014] The hatch cover is composed of multiple hatch panels 2, and the hatch is opened by sliding these multiple hatch panels 2 in the opening direction, and the hatch is closed by sliding them in the closing direction, which is the opposite direction to the opening direction.

[0015] The hatch cover opening and closing device 10 is a device for opening and closing a hatch cover that slides and sequentially stores multiple hatch panels 2 to open the hold, and slides and sequentially deploys multiple hatch panels 2 to close the hold.

[0016] An endless chain portion 11 is connected to the hatch panels 2 to slide the hatch panels 2. The endless chain portion 11 is stretched over a drive chain wheel portion 12 and driven chain wheel portions 14, 16, and 18.

[0017] The endless chain portion 11 is a "reliable transmission" type among the transmission element wrapping transmission devices. The endless chain portion 11 is hooked onto the gear portion 12a of the drive chain wheel portion 12 and the gear portions of the driven chain wheel portions 14, 16, and 18, which will be described later, to transmit power and rotational motion.

[0018] The drive chain wheel unit 12 includes a gear part 12a, a gear cover part 12b, a mounting part 12c, a guide part 12d, and a hydraulic motor. The drive chain wheel unit 12 has a sprocket that outputs a driving force for moving the endless chain part 11.

[0019] The gear portion 12a has a function of meshing with the endless chain portion 11. The gear portion 12a is a mechanical element that has teeth formed at equal intervals on the outer peripheral surface of a rotating body, and that meshes with the teeth one after another to efficiently transmit power.

[0020] The speed ratio (speed transmission ratio) between the gear portion 12a of the drive chain wheel portion 12 and the gear portions of the driven chain wheel portions 14, 16, 18 can be changed, and the rotation direction and axial direction can be changed.

[0021] The hydraulic motor is a three-phase AC rotating electric machine that outputs a driving force to rotate the rotation shaft of the gear portion 12a, but may be any other rotating electric machine.

[0022] The gear cover 12b is a cover that covers the side surface of the gear part 12a to prevent an operator from coming into contact with the rotating gear part 12a. The gear cover 12b is made of a material having an appropriate strength, such as a metal.

[0023] The mounting portion 12c is disposed in front of the gear portion 12a at a predetermined distance, and supports the endless chain portion 11 to guide the endless chain portion 11 to the gear portion 12a. The mounting portion 12c is made of a material having an appropriate strength, such as metal.

[0024] The mounting portion 12c is a member having a substantially U-shape (actually upside down). The endless chain portion 11 is placed on a rod portion that supports the ceiling of the mounting portion 12c, and the endless chain portion 11 is moved toward the gear portion 12a while being maintained at a predetermined height.

[0025] The guide portion 12d extends from the placing portion 12c to the outer periphery of the gear portion 12a and guides the movement of the endless chain portion 11.

[0026] As shown in Fig. 2(d), guide portion 12d extends from the center toward gear portion 12a on the ceiling of mounting portion 12c, which is substantially U-shaped, so that the ceiling of mounting portion 12c and guide portion 12d form a substantially T-shape in plan view, as shown in Fig. 2(d).

[0027] The guide portion 12d has a shape that follows the outer periphery of the gear portion 12a so as to guide the endless chain portion 11 to the top of the gear portion 12a. Specifically, the guide portion 12d extends slightly upward from the mounting portion 12c, along the outer periphery of the gear portion 12a, and is tapered at the tip as shown in Fig. 2(b).

[0028] The ceiling of guide portion 12d is a flat surface to allow endless chain portion 11 to move easily, but guide walls may be formed on both sides of the flat surface to guide endless chain portion 11. Guide portion 12d is made of a material having an appropriate strength, such as metal.

[0029] The driven chain wheel portions 14, 16, 18 have sprockets for guiding the movement of the endless chain portion 11 caused by the driving force of the driving chain wheel portion 12.

[0030] Each of the driven chain wheel units 14, 16, and 18 has a gear part 12a and a gear cover part 12b. The gear parts of the driven chain wheel units 14, 16, and 18 have the function of meshing with the endless chain unit 11. The gear part 12a is a mechanical element that has evenly spaced teeth on the outer peripheral surface of a rotating body, and these teeth mesh with each other one after another to efficiently transmit power.

[0031] The gear cover portions 12b of the driven chain wheel portions 14, 16, 18 are covers that cover the sides of the gear portions of the rotating driven chain wheel portions 14, 16, 18 to prevent the operator from coming into contact with the gear portions.

[0032] The hatch cover opening / closing device 10 opens and closes hatches for loading and unloading cargo into the hold of a cargo ship. To this end, a drive chain wheel unit 12 and driven chain wheel units 14, 16, 18 are arranged as shown in Figure 1(a) so that multiple hatch panels 2 can be slid.

[0033] The endless chain portion 11 is stretched over the drive chain wheel portion 12 and the driven chain wheel portions 14, 16, and 18. As a result, when the hydraulic motor of the drive chain wheel portion 12 is operated, the endless chain portion 11 moves, causing the hatch panel 2 connected to the endless chain portion 11 to slide.

[0034] Next, the operation of the hatch cover opening / closing device 10 configured as described above will be explained. Figure 2 shows a hatch cover opening / closing device of the prior art. Conventionally, hatch covers for opening and closing hatches on cargo ships are opened and closed by an opening / closing device. These hatch covers are connected to a chain, and there is a drive chain wheel that drives this chain. As shown in Figure 2, if the width is narrow, the chain will drop, causing the chain to get caught in the drive chain wheel and stop moving, which is a problem. The present invention provides a significant solution to this problem.

[0035] For example, each hatch in a 499-ton container weighs 6.5 to 8 tons. If there are seven hatches, the weight will be nearly 50 tons, so the greatest force is applied to the initial movement of opening and closing the hatches. However, once two hatches are lifted up, they become lighter and then move relatively smoothly.

[0036] According to the hatch cover opening and closing device 10, a roughly U-shaped (actually upside down) mounting section 12c is installed near the drive chain wheel section 12 that outputs the driving force to drive the endless chain section 11, and the endless chain section 11 is installed on the ceiling of this mounting section 12c and is guided to the gear section 12a of the drive chain wheel section 12 while remaining at a predetermined height.

[0037] A gap is formed between the mounting portion 12c and the gear portion 12a, but a guide portion 12d is installed to fill this gap, extending from the center of the ceiling of the mounting portion 12c to the top of the gear portion 12a.

[0038] Furthermore, as shown in Figure 1, this guide section 12 allows more time for the chain to fall than in Figure 2, and the endless chain section 11 placed on the placement section 12c can be guided to the top of the gear section 12a, thereby achieving the remarkable effect of preventing the chain from getting caught in a gap and allowing the endless chain section 11 to smoothly engage with the gear section 12a, allowing the hatch cover to be opened and closed smoothly. [Explanation of symbols]

[0039] 2 hatch panel, 10 hatch cover opening / closing device, 11 chain section, 12 drive chain wheel section, 12a gear section, 12b gear cover section, 12c mounting section, 12d guide section, 14, 16, 18 driven chain wheel section.

Claims

1. A hatch cover opening and closing device that slides and sequentially stores a plurality of hatch panels to open a hold, and slides and sequentially deploys the plurality of hatch panels to close the hold, an endless chain portion connected to the plurality of hatch panels to slide the plurality of hatch panels; a drive chain wheel unit that outputs a drive force for moving the endless chain unit; a driven chain wheel portion for guiding movement of the endless chain portion due to the driving force of the driving chain wheel portion; The drive chain wheel portion is a gear portion that meshes with the endless chain portion; a placing portion disposed in front of the gear portion at a predetermined interval, on which the endless chain portion is placed to guide the endless chain portion to the gear portion; a guide portion extending from the mounting portion to an outer periphery of the gear portion and guiding the movement of the endless chain portion; A hatch cover opening and closing device comprising:

2. The hatch cover opening and closing device according to claim 1, A hatch cover opening and closing device characterized in that the guide portion has a shape that follows the outer periphery of the gear portion so as to guide the endless chain portion to the top of the gear portion.

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