Hatch cover opening and closing device

Abstract

To provide an opening and closing device for a hatch cover, which smoothly guides an endless chain part connected to a hatch panel constituting the hatch cover to a gear part. [Solution] The hatch cover opening and closing device 10 is a device in which multiple hatch panels slide to open and close a hold, and is characterized by having an endless chain section 11 connected to multiple hatch panels to slide the multiple hatch panels, a driving chain wheel section 12 that outputs a driving force to move the endless chain section 11, a driven chain wheel section 14 for guiding the movement of the endless chain section 11 by the driving force of the driving chain wheel section 12, a placing section 12c on which the endless chain section 11 is placed, and a guide section 12d that guides the movement of the endless chain section 11.

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 a 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 in both directions along the centerline of the ship's hull to open and close them, a one-panel side rolling type that straddles the center of the ship's hull, and an end rolling type hatch cover that opens and closes with one or two panels in the bow and stern directions of the ship, and which are characterized by being provided with a link mechanism for opening and closing. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2008-68852 A Summary of the Invention [Problem to be solved by the invention]

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

[0005] An object of the present invention is to provide a hatch cover opening and closing device that effectively guides an endless chain portion connected to a hatch panel that constitutes the 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 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, and comprises an endless chain section connected to the plurality of hatch panels in order to slide the plurality of hatch panels, a drive chain wheel section that outputs a driving force for moving the endless chain section, and a driven chain wheel section for guiding the movement of the endless chain section by the driving force of the drive chain wheel section, Equipped with The drive chain wheel portion is engaged with the endless chain portion. and has an outer periphery including a recess The chain linking device has a gear section, a placement section arranged in front of the gear section with a predetermined distance therebetween, on which the endless chain section is placed in order to guide the endless chain section to the gear section, and a guide section extending from the placement section to the outer periphery of the gear section and guiding the movement of the endless chain section. The guide portion extends slightly upward from the placement portion so as to guide the endless chain portion with no gap at the top of the gear portion, and has a tip portion formed in a tapered shape so as to enter the recess by having a width narrower than that of the recess of the gear portion and to follow the outer periphery of the gear portion. It is characterized by:

[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 uppermost part of the gear portion. Effect 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 description 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. [Diagram 2] FIG. 1 shows a hatch cover opening and closing device according to the prior art. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the following, the same elements in all the drawings are given the same reference numerals, and duplicated explanations will be omitted. In addition, in the explanation in the text, the reference numerals previously described will be used as necessary.

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

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

[0013] A cargo ship is a vessel that mainly 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 hatch cover as a so-called Pontoise type hatch cover (FV type hatch cover).

[0014] The hatch cover is composed of a number of hatch panels 2, and the hatch is opened by sliding these 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 hatch covers that slide and sequentially store multiple hatch panels 2 to open the hold, and slide and sequentially deploy multiple hatch panels 2 to close the hold.

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

[0017] The endless chain portion 11 belongs to the "positive transmission" category of the winding transmission device of the transmission element. The endless chain portion 11 is hung on 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 unit 12a, a gear cover unit 12b, a mounting unit 12c, a guide unit 12d, and a hydraulic motor. The drive chain wheel unit 12 has a sprocket that outputs a driving force for moving the endless chain unit 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 equally spaced teeth formed on the outer circumferential surface of a rotor, and that transmits power efficiently by meshing with the teeth one after another.

[0020] It is possible to change the speed ratio (speed transmission ratio) between the gear portion 12a of the driving chain wheel portion 12 and the gear portions of the driven chain wheel portions 14, 16, 18, and to change the rotation direction and axial direction.

[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 another type of rotating electric machine.

[0022] The gear cover portion 12b is a cover that covers the side surface of the gear portion 12a to prevent an operator from hitting the rotating gear portion 12a. The gear cover portion 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 with a predetermined distance therebetween, 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 a 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 bar portion that spans the ceiling of the mounting portion 12c, and the endless chain portion 11 is moved toward the gear portion 12a while being kept at a predetermined height.

[0025] The guide portion 12d extends from the placement 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), the guide portion 12d extends from the center toward the gear portion 12a at the ceiling of the substantially U-shaped mounting portion 12c, so that the ceiling of the mounting portion 12c and the 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 placement portion 12c, extends along the outer periphery of the gear portion 12a, and is formed so as to taper at the tip as shown in FIG. 2(b).

[0028] The ceiling of the guide portion 12d is a flat surface so that the endless chain portion 11 can easily move, but guide walls may be formed on both sides of the flat surface so as to guide the endless chain portion 11. The guide portion 12d is made of a material having an appropriate strength, such as a 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 parts 14, 16, and 18 includes a gear part 12a and a gear cover part 12b. The gear parts of the driven chain wheel parts 14, 16, and 18 have a function of meshing with the endless chain part 11. The gear part 12a is a mechanical element that has evenly spaced teeth on the outer circumferential surface of a rotating body, and efficiently transmits power by meshing with the teeth one after another.

[0031] The gear cover portion 12b of the driven chain wheel portion 14, 16, 18 is a cover that covers the side of the gear portion of the rotating driven chain wheel portion 14, 16, 18 to prevent an operator from coming into contact with the gear portion.

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

[0033] The endless chain portion 11 is stretched across the drive chain wheel portion 12 and the driven chain wheel portions 14, 16, and 18. As a result, the hydraulic motor of the drive chain wheel portion 12 is operated to move the endless chain portion 11, thereby 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 described. Fig. 2 is a diagram showing a hatch cover opening / closing device of the prior art. Conventionally, hatch covers for opening and closing the hatches of 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 Fig. 2, there is a problem that the chain drops when the width is narrow, and the chain gets caught in the drive chain wheel and stops moving. The present invention has a remarkable effect on such a problem.

[0035] For example, the weight of each hatch in a 499-ton container is 6.5 to 8 tons. If there are seven hatches, the weight will be close to 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, the weight becomes lighter, and the movement thereafter becomes relatively smooth.

[0036] According to the hatch cover opening and closing device 10, a roughly U-shaped (actually, upside down) mounting portion 12c is installed near the drive chain wheel portion 12 which outputs the driving force to drive the endless chain portion 11, and the endless chain portion 11 is installed on the ceiling of this mounting portion 12c and guided to the gear portion 12a of the drive chain wheel portion 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 provided extending from the center of the ceiling of the mounting portion 12c to the top of the gear portion 12a to fill this gap.

[0038] Furthermore, with this guide section 12, as shown in Figure 1, there is more leeway 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, resulting in the remarkable effect that the chain does not get caught in a gap, and the endless chain section 11 can be smoothly engaged 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

[Claim 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 caused by the driving force of the driving chain wheel portion; Equipped with The drive chain wheel portion is a gear portion that meshes with the endless chain portion and has an outer periphery including a recess; a placement portion disposed in front of the gear portion at a predetermined interval, on which the endless chain portion is placed so as 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 a movement of the endless chain portion; having The guide portion extends slightly upward from the placement portion so as to guide the endless chain portion with no gap at the top of the gear portion, and has a tip portion formed in a tapered shape so as to enter into the recess and follow the outer periphery of the gear portion by having a width narrower than that of the recess of the gear portion.

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