JP2012020697A - Vent sleeve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the upper end opening of a combing to be shut by safely operating a handle in a vent sleeve for ventilating the inside and outside of a ship.SOLUTION: The vent sleeve 1 includes: the combing 11, which encloses a deck opening 21 to be protruded; and an umbrella 12 to be covered on the upper end opening 111 of the combing 11. The vent sleeve 1 has such a configuration that a shaft 13 is supported by the combing 11 to be extended beyond the upper end opening 111 of the combing 11 from the lower direction of the deck opening 21 so as to form a male screw section 132 on the upper direction from the upper opening 111 of the combing 11, a handle 14 is disposed between the lower end of the shaft 13 and the deck opening 21, and a lid 15 is formed by disposing a female section 151 screwed to the male screw section 132 of the shaft 13 and a guide engaging section 152 to be freely movable and engaged the shaft 13 with in a rotation direction in rise and fall directions to a rise and fall guide 122 on the umbrella 12.

Description

  The present invention relates to a ventilation cylinder used for ventilation inside and outside a ship.

  Ventilation tubes used for ventilation inside and outside the ship are combing that protrudes around an opening (hereinafter referred to as the deck opening) provided on the deck or the ceiling of an independent closed compartment (module) (hereinafter referred to as the deck). There are many configurations comprising a (tubular body) and a cap placed on the upper end opening of the combing. This ventilation tube is called a mushroom ventilation tube (hereinafter, the ventilation tube in the present invention means a mushroom ventilation tube). Combing prevents the seawater from entering the deck opening, and the Casa prevents seawater from entering the top opening of the combing. For this reason, in the ventilation tube, the lower surface opening of the umbrella is positioned below the upper end opening of the combing, and the upper end opening of the combing cannot be visually recognized from the outside. Combing may incorporate a blower fan for forced ventilation (see Patent Document 1 and FIG. 1, Patent Document 3 and FIG. 1).

  The ventilation tube normally opens the upper end opening of the combing, but in order to prevent the inflow of seawater, a lid that opens and closes the upper end opening is provided (Patent Documents 1 to 3). For example, Patent Document 1 discloses a ventilating cylinder in which a handle (9) is provided at the upper end of a shaft (shaft 7) that penetrates the upper surface of the hood (bonnet 4) and projects downward, and a lid (cover 6) is provided at the lower end. (See Patent Document 1 and FIG. 2). In the shaft, a male screw portion provided in a portion penetrating the upper surface of the cage is screwed into a female screw portion (screw hole 8) provided in the upper surface of the cage. As a result, when the handle (9) is turned, the threaded position of the male thread portion changes relative to the female thread portion, so that the shaft is raised and lowered relative to the upper surface of the cage, and the lid that moves up and down with the shaft is the upper end of the combing. Open and close from the top approaching and leaving the opening. The same applies to Patent Document 2 and Patent Document 3.

Japanese Utility Model Publication No. 03-068200 Japanese Utility Model Publication No. 61-114234 Japanese Utility Model Publication No.59-156898

  The lid of the ventilating pipe closes the upper end opening in a situation where, for example, the sea is greatly rough and seawater flows from the lower surface opening of the umbrella to the upper end opening of the combing. This is because the upper end opening of the combing is closed by the cover of the ventilation pipe, so that the worker goes up to the deck in the environment where the sea is greatly rough, and it is necessary to operate the handle provided on the upper part of the cover outside the ship. means. Although there are few opportunities to operate the handle of the draft tube, it is very dangerous for an operator to go up and operate the handle on the deck in a large and rough environment. In order to develop a ventilator that can safely close the upper end opening of the combing by operating the handle, we examined it.

  As a result of investigation, in the ventilation tube composed of combing that protrudes around the deck opening and the cover that covers the top opening of the combing, the shaft is supported by the combing and the upper end of the combing from below the deck opening. It extends beyond the opening, forms a male threaded part upward from the upper end opening of the combing, the handle is provided between the lower end of the shaft and the deck opening, the cover is provided with a female threaded part that engages with the male threaded part of the shaft, A ventilator with a guide engaging part that is movable in the up-and-down direction and engages in the direction of rotation of the shaft with respect to the up-and-down guide provided at the top is developed. The “deck” referred to in the present invention refers to the upper surface that defines the inside and outside of the ship, such as the deck and the ceiling of an independent closed section (module), and the deck opening means an opening provided on the upper surface.

  The ventilator of the present invention has a shaft supported against combing that extends from below the deck opening beyond the top opening of the combing and provides a handle between the bottom opening and the deck opening, thereby operating the handle from within the ship. It can be so. The lid is screwed into the male threaded portion formed upward from the upper end opening of the combing of the shaft, and the guide engaging portion is movable in the ascending / descending direction and engaged in the rotating direction of the shaft with the elevating guide provided on the cover Thus, the internal thread portion is moved in the vertical direction according to the rotation of the external thread portion accompanying the rotation of the shaft without being rotated along with the rotation of the shaft, and is moved closer to and away from the upper end opening of the combing.

  The shaft is supported by a support beam installed inside the combing. The lifting guide provided on the cage is a bar or plate extending in the vertical direction, and at least one lifting guide may be provided. However, in order to raise and lower the lid with a stable posture, it is equally spaced in the circumferential direction with respect to the lid with a circular cross section. It is desirable to provide a plurality. Moreover, it is good for the raising / lowering guide which is a board to align a surface in parallel with a radial direction with respect to a cover with a circular cross section. Since the male screw part formed on the shaft determines the moving range of the female screw part, i.e., the raising / lowering range of the lid, in order to bring the lid into close contact with the upper end opening of the combing, it extends downward from the upper end opening when the lid is closed. It is desirable that From this, “the male screw portion is formed upward from the upper end opening of the combing” includes the case where the male screw portion is formed to extend slightly from the upper end opening of the combing.

  As described above, the lid is configured so that the internal thread portion is screwed into the male thread portion of the shaft, and the guide engaging portion is engaged with the lifting guide, thereby preventing rotation of the rotating shaft while preventing rotation of the rotating shaft. Go up and down. That is, the shaft itself does not move up and down, but only the cover moves up and down. However, when the handle starts to rotate with the cover stopped, the position of the cover is fixed, and the shaft tends to move up and down. Therefore, to prevent the shaft from moving up and down at the beginning of the turning of the handle, the shaft is prevented from ascending by bringing the upper end into contact with the bearing portion provided on the cage from the lower side so that the lid starts to move up and down immediately. A collar for increasing the outer diameter is externally fitted, and the collar is engaged from above with a support beam provided on the combing to prevent the lowering.

  The ventilator of the present invention is provided with a handle in the ship that rotates the shaft that moves the lid close to and away from the upper end opening of the combing so that the handle can be operated safely from the ship even when the sea is greatly rough. To. Thereby, a worker's safety can be improved greatly. In addition, the shaft that can be completely stored in the interior of the cage and the combing is brought into contact with the bearing portion provided on the collar from the lower end, and the collar fitted on the support beam provided on the combing is engaged from above. The shaft is prevented from rising and lowering at the stage where the handle starts to be rotated, and the lid is immediately raised and lowered so that the lid can be opened and closed reliably and smoothly.

It is a longitudinal cross-sectional view showing an example of the ventilation cylinder to which this invention is applied. It is a top view of the ventilation cylinder of this example. It is AA sectional drawing in FIG. 1 of the ventilation cylinder of this example. It is BB sectional drawing in FIG. 1 of the ventilation cylinder of this example. FIG. 2 is a cross-sectional view corresponding to FIG. 1 at a stage where the handle starts to be turned to the right with the upper end opening of the combing opened. FIG. 2 is a cross-sectional view corresponding to FIG. 1 at a stage where the handle is turned to the right to lower the lid and close the upper end opening of the combing. FIG. 2 is a cross-sectional view corresponding to FIG. 1 at a stage where the handle starts to be turned to the left with the upper end opening of the combing closed. FIG. 2 is a cross-sectional view corresponding to FIG. 1 at a stage where the handle is turned counterclockwise to raise the lid and open the upper end opening of the combing.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 4, the ventilator 1 to which the present invention is applied is substantially the same as the conventional ventilator except that there is no handle outside the ship, and is provided on the deck 2. The combing 11 protrudes so as to surround the deck opening 21, and the cover 23 covers the upper end opening 111 of the combing 11. The ventilator 1 of the present invention is provided with a lid 15 in the cap 12 that can close the upper end opening 111 when, for example, the sea is greatly rough, but a shaft 13 that rotates to raise and lower the lid 15. Is housed in the combing 11, and the handle 14 provided at the lower end of the shaft 13 can be operated in the ship (below deck 2 in FIG. 1).

  The combing 11 is a metal cylinder having an upper end opening 111 and a lower end opening, and eight combing reinforcing flanges 115 are fixed at equal intervals in the circumferential direction between a mounting flange and a side surface welded to the periphery of the lower end opening. Yes. The combing 11 of this example does not surround the deck opening 21 and is directly fixed to the deck 2, but the mounting flange 22 is brought into contact with the annular mounting base 22 fixed to the deck opening 21, and is fixed by bolts. is doing. The mounting base 22 has eight base reinforcing flanges 23 fixed between the circumferential surface and the deck 2 at equal intervals in the circumferential direction to increase the mounting strength to the deck 2 and at the same time prevent the rigidity of the deck opening 21 from being lowered. ing. Further, the combing 11 is bolted to the mounting base 22 so that it can be attached and detached in units of one ventilation cylinder and can be easily replaced as necessary.

  The ventilation tube 1 of the present invention supports the shaft 13 with respect to the combing 11. In the combing 11 of this example, the four support beams 112 protrude from the inner side surface inward in the radial direction at a height slightly lowered from the middle stage, and a through portion 113 is provided at the center where the support beams 112 intersect. . The penetrating part 113 supports the shaft 13 through a built-in bearing, and allows the shaft 13 to move up and down and rotate. However, the shaft 13 (more precisely, the upper shaft 131 described later) has a collar 133 whose outer diameter is larger than that of the bearing of the penetrating portion 113, and the collar 133 is engaged with the upper end surface of the penetrating portion 113. Because it is supported without falling. In addition, the combing 11 of this example has a protective net 114 that prevents the entry of small animals at a position slightly lowered from the upper opening 111.

  Casa 12 is formed by lowering the metal peripheral surface from the peripheral edge of the upper surface with a metal disk having a circular outer view whose outer diameter is larger than that of combing 11, and between the side surface of combing 11 and the peripheral surface. An annular lower surface opening 121 is formed therebetween. The cassette 12 is provided with elevating guides 122 made of eight metal plates at equal intervals in the circumferential direction from the inner surface of the circumferential surface inward. Each elevating guide 122 is connected to eight support flanges that protrude from the outer side surface outward in the radial direction at a height slightly lowered from the upper end opening 111 of the combing 11. As a result, the positional relationship in the height direction and the circumferential direction of the cap 12 with respect to the combing 11 is specified, and the lower surface opening 121 of the cap 12 is always positioned below the upper end opening 111 of the combing 11, so that the combing 11 in the normal state Inflow of seawater to the water is prevented.

  The upper surface of the cage 12 is provided with a bearing portion 123 that abuts the upper end of a shaft 13 (precisely, an upper shaft 131, which will be described later) in the center, and the eight pieces are in a positional relationship connecting the bearing portion 123 and each lifting guide 122. Reinforcing ribs are attached to increase rigidity. The bearing portion 123 supports the shaft 13 through a built-in bearing, and allows the shaft 13 to move up and down and rotate. However, the upper end surface of the bearing portion 123 is covered with a pressing plate 124, which is a thick metal plate, by bolting the upper surface of the cage 12. As a result, the shaft 13 (more precisely, the upper shaft 131 described later) is prevented from rising by bringing the upper end into contact with the pressing plate 124. The holding plate 124 also has a function as a maintenance door that is removed if necessary, for example, replenishes grease to the bearings of the bearing portion 123.

  The shaft 13 of this example is not a single rod that extends from below the deck opening 21 beyond the upper end opening 111 of the combing 11 but a divided structure of an upper shaft 131 and a lower shaft 135. In the ventilating cylinder 1 of the present invention, the shaft 13 may be either a single rod or a divided structure, but it is desirable that the shaft 13 be divided in terms of the assembly of the ventilating cylinder 1. Further, for example, when the combing 11 is meandering, the shaft 13 can be accommodated in the meandering combing 11 if the shaft 13 is divided and the divided shafts are connected by a universal joint.

  The upper shaft 131 is a metal rod or pipe in which a male threaded portion 132 is formed in a range from the upper end to a position slightly lower than the upper end opening 111 of the combing 11, and is slightly smaller than the portion inserted into the bearing portion 123 provided in the cage 12. An annular stopper 134 is attached below. The stopper 134 is engaged from above with the lid 15 that rises by screwing the female screw portion 151 into the male screw portion 132, and sets the upper limit of the lid 15. As described above, the upper shaft 131 is supported by the combing 11 by externally fitting the collar 133 on the lower side and engaging the collar 133 with the through-hole 113 provided in the support beam 112 of the combing 11. . The collar 133 has a height that is supported by the through-hole 113 provided on the support beam 112 of the combing 11 after loosely fitting to the upper shaft 131 in a free state, and a pin orthogonal to the plane is inserted into the upper shaft 131. The position is fixed.

  The lower shaft 135 is a metal rod or pipe provided with a coupling joint 136 at the upper end, and the handle 14 is provided at the lower end. The coupling joint 136 is a pipe that is externally fitted so as to protrude from the upper end of the lower shaft 131, and is fixed to the lower shaft 131 by welding. The upper shaft 131 and the lower shaft 135 are connected by inserting a pin perpendicular to the connecting joint 136 in the plane at the lower end of the upper shaft 131 inserted into the connecting joint 136. The reason why the shaft 13 is divided is to facilitate the assembly of the ventilation tube 1, but the length of the lower shaft 135 can be determined independently of the upper shaft 131, so that only the lower shaft 135 is replaced. The height of the deck opening 21 in the ship can be accommodated while the portion excluding the lower shaft 135 has the same structure of the ventilation cylinder 1.

  The handle 14 has a deck opening 21 from the lower end of the shaft 13 (if the deck 2 is thin, there is no problem if the deck opening 21 looking out of the ship and the deck opening 21 looking inside the ship are regarded as the same, but the deck 2 is thick. The “deck opening 21” here means an opening in the ceiling surface viewed from inside the ship.) If the operator can operate from inside the ship, it does not necessarily have to be provided at the lower end of the shaft 13. Good. Since the handle 14 is usually hardly operated, it is basically unnecessary. Therefore, it is desirable to provide the handle 14 at the lower end of the shaft 13 while minimizing the downward projection of the shaft 13. In this case, if the position of the handle 14 becomes too high, an operator gets on the stand that can be installed and removed in the ship and operates the handle 14.

  The lid 15 is a metal disk having an outer diameter larger than that of the upper end opening 111 of the combing 11 and is provided with a female screw portion 151 at the center. The female screw portion is a metal block having a hole in which a female screw for screwing the male screw portion 132 is opened. The lid 15 in this example does not simply cover the upper end opening 111 from above, but an annular main flange that protrudes downward on the periphery and an annular sub-flange that protrudes downward on the inner periphery from the main flange. A seal ring 153 fitted between the upper end 111 and the upper end periphery of the combing 11 is pressed from above to ensure water tightness. For this reason, radial reinforcing ribs extending from the female thread portion to the sub-flange are provided so that the seal ring 153 is pressed evenly in the circumferential direction on the peripheral edge of the upper end of the combing 11, thereby increasing the rigidity of the lid 15.

  The lid 15 engages a guide engaging portion 152 that protrudes outward in the radial direction from the peripheral edge in the rotation direction of the shaft 13 while being movable in the up-and-down direction with respect to the up-and-down guide 122 provided in the cage 12. Don't let 13 go around. The guide engaging portion 152 is a plate material having a rectangular shape in plan view, and a slit wider than the lifting guide 122 is formed radially inward from the outer peripheral side, and the edge of the lifting guide 122 is inserted into the slit (FIG. 3). reference). Accordingly, when the shaft 13 rotates with the height direction fixed by the operation of the handle 14, the lid 15 engages the guide engaging portion 152 with the lifting guide 122, and the threaded position of the female screw portion 151 with respect to the male screw portion 132 Change up and down.

  At least one guide engaging portion 152 may be provided when it is used as a follow-up preventing member for the lid 15, but when it is used as a lift guide member for the lid 15, a plurality of guide engaging portions 152 are preferably provided, and a plurality thereof are evenly spaced in the circumferential direction. It is more desirable to be arranged in Thus, there are two guide engaging portions 152 of this example that function as a follow-up prevention member and a lift guide member, and they are arranged in a point-symmetrical positional relationship. In addition, since the plurality of guide engaging portions 152 engage with the lifting guide 122, the positioning guide member inevitably specifies the positional relationship of the lid 15 with respect to the cage 12 provided with the lifting guide 122. And has a function of assisting in assembling the ventilation tube 1.

  The ventilator 1 of the present example opens and closes the upper end opening 111 of the combing 11 by raising and lowering the lid 15 as follows. As shown in FIG. 1, the ventilation tube 1 normally raises the lid 15 to open the upper end opening 111 of the combing 11. When the handle 14 starts to rotate clockwise from this state, as shown in FIG. 5, the lid 15 does not immediately start to descend, but the shaft 13 first tries to rise (see the broken arrow in FIG. 5). . This is because the rotation of the shaft 13 is such that the male screw portion 132 is first screwed into the female screw portion 151 when the lid 15 that is prevented from being rotated with respect to the rotation of the shaft 13 is stopped.

  However, in the ventilating cylinder 1 of this example, the upper end of the shaft 13 is brought into contact with the holding plate 124 from below so that the shaft 13 cannot be raised even if it is going to rise. As a result, the shaft 13 is prevented from rising, and the lid 15 is lowered relative to the shaft 13 that rotates in a fixed position in the height direction. Then, as shown in FIG. 6, a seal ring 153 held on the lower surface of the peripheral edge of the lid 15 is pressed against the upper peripheral edge of the combing 11 from above to ensure sufficient airtightness. Close 111. Whether or not the lid 15 has closed the upper end opening 111 is not provided with any particular discriminating means as in the prior art, but can be easily determined by the operator perceiving an increase in torque for turning the handle 14.

  The procedure for raising the lid 15 and opening the upper end opening 111 is basically the reverse of the procedure for lowering the lid 15 described above. From now on, when the handle 14 is started to rotate counterclockwise from the state in which the upper end opening 111 is closed from above by the lid 15, as shown in FIG. 7, the lid 15 does not immediately start to rise, as shown in FIG. The shaft 13 is going to descend (see broken line arrow in FIG. 7). This is because the rotation of the shaft 13 works so as to first screw back the male screw portion 132 from the female screw portion 151 when the lid 15 that is prevented from being rotated with respect to the rotation of the shaft 13 is stopped.

  However, the ventilating tube 1 of the present example cannot be lowered even if the collar 133 fitted on the shaft 13 is engaged with the through-hole 113 provided on the support beam 112 of the combing 11 from above and the shaft 13 is lowered. I am doing so. As a result, the shaft 13 is prevented from being lowered, and the lid 15 is raised relative to the shaft 13 that rotates in a fixed position in the height direction. As seen in FIG. 8, the seal ring 153 of the lid 15 moves away from the upper edge of the combing 11, and the lid 15 opens the upper end opening 111. The lid 15 may be lifted as long as it is separated from the upper end opening 111 to some extent. The ventilating cylinder 1 of this example is allowed to ascend in a range until it comes into contact with the stopper 134 provided on the shaft 13 (FIG. 8 is an illustration in which the ascent of the lid 15 is stopped before the stopper 134. ing).

  Here, if the handle 14 continues to rotate, the lid 15 continues to rise beyond the stopper 134, eventually stops being lifted until it is pressed against the reinforcing rib inside the upper surface of the cage 12, and then continues to rotate the handle 14 this time. The shaft 13 may start to rise. The holding plate 124 that abuts the upper end of the shaft 13 from below has a function of reliably preventing the shaft 13 from rising in such an abnormal situation. The structure in which the shaft 13 is passed through the upper surface of the cage 12 and the upper end is in contact with the separate pressing plate 12 is to prevent the shaft 13 from rising in such an abnormal situation. For this reason, the presser plate 124 is made of a metal plate that is thicker than the plate material constituting the cover 12 and has high structural strength.

1 Ventilation tube
11 Combing
111 Top opening
12 Casa
121 Bottom opening
122 Lifting guide
13 Shaft
131 Upper shaft
132 Male thread
133 colors
135 Lower shaft
14 Handle
15 lid
151 Female thread 2 Deck
21 Deck opening

Claims (3)

In the ventilation tube composed of the combing that protrudes around the opening provided on the deck and the cover that covers the upper end opening of the combing,
The shaft is supported with respect to the combing and extends beyond the upper end opening of the combing from below the opening provided on the deck, and forms a male screw portion upward from the upper end opening of the combing,
The handle is provided between the lower end of the shaft and the opening provided on the deck,
The lid is provided with a female threaded portion that is screwed into a male threaded portion of the shaft, and is provided with a guide engaging portion that is movable in the ascending / descending direction with respect to the elevating / lowering guide provided on the cage and that engages in the rotating direction of the shaft. Ventilation tube to be. The ventilating tube according to claim 1, wherein the shaft has an upper end abutted from below on a bearing portion provided on the cage. The ventilation cylinder according to claim 1, wherein the shaft is fitted with a collar that increases an outer diameter, and the collar is engaged from above with a support beam provided for combing.

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