JP2018155026A - Lid device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lid device for opening and closing an upper opening of a space, capable of securing waterproof performance as well as allowing relatively easy opening and closing operations while making a power source unnecessary in a relatively simple configuration.SOLUTION: A lid 5 is raised by an elevating mechanism 7 and then slid, thereby opening the upper opening 1 of the space. The elevating mechanism 7 is a feed screw mechanism constituted of a screw shaft 72 and a female screw member 73, and is operated by human power using a lift handle 74. Moreover, a seal rings 9, 10 are provided with respective lips so that the lips come into contact with the lid 5 in an oblique posture.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a lid device for opening and closing an upper opening (entrance / exit) of an appropriate space.

  For example, in FIGS. 5 to 7 of Patent Document 1 and pages 2 to 3 of the specification, the hatch cover is lifted by a hydraulic cylinder in order to prevent abrasion due to rubbing of rubber packing of a ship hatch cover. After that, a structure is described in which the hatch cover is moved laterally while rolling the roller of the hatch cover with a winch and a wire.

  The fourth page of the specification of Patent Document 1 requires four hydraulic cylinders for individually raising and lowering the four rollers provided at the four corners of the hatch cover, and the hydraulic piping of the four hydraulic cylinders. For example, it is described that the structure becomes complicated and the equipment cost becomes very high.

  On the other hand, FIGS. 1 to 4 of Patent Document 1 and pages 6 to 8 of the specification show a jack-up for lifting the hatch cover as the wire rope is rolled up instead of the hydraulic cylinder. It is described that the cost can be reduced and the structure can be simplified by using the metal fittings.

  In addition, for example, FIGS. 1 to 8 of Patent Document 2 and paragraphs 0014 to 0017 of the specification describe a structure in which a lid such as a manhole is lifted and slid relatively easily (manually).

  In this structure, four small wheels are attached to the lower surface of the lid, while a rail and a rail lifting mechanism are provided inside the outer frame of the hole, and the screw rod of this rail lifting mechanism is rotated by a T-shaped jig bar. Thus, the rail and the lid are lifted and then the lid is slid.

  Further, for example, in FIGS. 1 to 5 of Patent Document 3 and paragraphs 0008 to 0014 of the specification, a structure in which a lid is lifted and slid relatively easily (manually) in a sliding type lid closing device at the entrance of a horizontal floor surface. Is described.

  In this structure, four rollers are attached to the lower surface of the lid body via a retractable leg, while a guide rail is attached around the entrance of the underground facility, and the operating shaft of the retractable leg is rotated with a rotating tool, The lid is pushed up and then slid.

  In this Patent Document 3, it is described that water-stopping rubber is used in order to prevent water from entering the inlet. This water-stopping rubber is formed in a rectangular cross section and is fitted in the groove-shaped portion of the edge frame on the lid side. The water blocking rubber is fitted to the edge frame on the inlet side in the closed state of the lid, and is separated from the edge frame on the inlet side when the lid is pushed up.

Japanese Utility Model Publication 2-74298 Japanese Patent No. 2588477 Japanese Patent No. 2964142

  The jack-up tool shown in FIGS. 1 to 4 of Patent Document 1 is engaged with a wire rope for sliding the hatch cover and operates by pulling the wire rope with a winch. In addition, when the drive power of the winch cannot be secured due to a power failure or the like, there is a concern that the hatch cover cannot be lifted by the jackup tool.

  In the above-mentioned Patent Document 2, there is a concern that the rail lifting mechanism is increased in size and complexity because of the relationship of lifting the rail.

  In the above-mentioned Patent Document 3, a rotation lever for allowing the lid to be opened from inside the underground facility with the lid closed is provided on the operating shaft, and the rotation lever protrudes toward the entrance side. Therefore, there is a concern that the installation work of the lid is troublesome.

  In view of such circumstances, the present invention provides a lid device for opening and closing the upper opening of a space, which requires a power source and has a relatively simple structure, while ensuring water stop performance and relatively easily opening and closing. The purpose is to be able to.

  The present invention is a lid device for opening and closing an upper opening of a space, the lid having an outer shape covering the upper opening, and rotatably supported on a lower side of the lid via a support member. A roller for reducing the operating force when sliding the cover to the closed position and the open position of the upper opening, an elevating mechanism for moving the roller up and down relative to the lid, and the upper opening surrounding the periphery of the upper opening Two contact-type seal rings that are mounted in two annular grooves concentrically provided inside and outside in the radial direction on the opening side or the lower surface side of the lid, and are pressed against the lower surface of the lid or the periphery of the upper opening; And both the seal rings are configured such that a lip projecting obliquely toward the outer diameter side toward the contact partner side is provided on the body portion fitted in the annular groove, and the elevating mechanism The support member fixed to the lid A guide member for guiding up and down movement; a screw shaft that is fixed to an upper portion of the support member and that protrudes upward from an upper surface of the lid; and is inserted into a through hole provided in the lid; and the through hole A female screw member that is fitted and fixed in the screw shaft and is screwed into the screw shaft; and a lift handle that is removably engaged with the protruding portion of the screw shaft and rotates the screw shaft. It is characterized by that.

  The lid device having this configuration is configured to open the upper opening of the space by raising the lid with the lifting mechanism without using a power source and then sliding the lid with the roller.

  That is, the elevating mechanism is a feed screw mechanism constituted by the screw shaft and the female screw member, and is configured to be operated manually by using the lift handle. Further, the roller is configured to be attached to the lower surface of the lid via the support member.

  As described above, the lid device of the present invention can be opened and closed relatively easily and smoothly while having a relatively simple configuration, and there is no problem that the lid cannot be opened in the event of a power failure.

  In addition, since the seal ring has a lip and the lip contacts the contact partner in an oblique posture, the lip is excellent in durability such that the lip is not easily crushed even if the lid is heavy. In addition, when the pressure from the outside is applied to the lip, the contact pressure to the contact partner is increased, and the water stop performance becomes as high as possible.

  By the way, around the upper opening, the lid is placed on the upper surface and a receiving frame having the two annular grooves is installed on the upper surface, and the two seal rings are formed by the two annular grooves of the receiving frame. When the lid is closed, each lip is pressed against the lower surface of the lid, and a lock is provided between the lid and the receiving frame so that the lid cannot be separated from the receiving frame. It is preferable that a configuration is provided in which a lock mechanism is provided for switching between the state and the unlocked state that allows separation.

  In this configuration, the installation location of the seal ring is specified, and it is specified that a lock mechanism is provided as a safety device when the lid is opened.

  This specification makes it possible to extend the wear life of the seal ring because the lid does not rub against the lip of the seal ring when the lid is raised and slid to open.

  Further, by providing the lock mechanism, it is possible to take safety measures for prohibiting the opening of the lid when it is not necessary to open the lid.

  In addition, when testing the water sealing performance of the two seal rings, the test seal ring is mounted with a test seal ring having a lip protruding obliquely toward the inner diameter side instead of the outer seal ring. It is preferable to adopt a configuration in which water pressure is applied by a water pressure applying device to a sealed space between the facing and the inner seal ring.

  In this configuration, the water sealing performance test of the seal ring can be performed easily and accurately regardless of the skill level of the inspection operator, as compared with the case where the deterioration degree of the seal ring is visually inspected.

  The lid device according to the present invention makes it possible to open and close relatively easily while ensuring water stopping performance while eliminating the need for a power source and having a relatively simple configuration.

It is sectional drawing which shows one Embodiment of the cover apparatus which concerns on this invention, Comprising: The obstruction | occlusion state is shown. It is sectional drawing which shows the state which raised the lid | cover in FIG. It is sectional drawing which decomposed | disassembled some lid apparatuses of FIG. It is a perspective view of the lid | cover apparatus of FIG. 1, Comprising: The obstruction | occlusion state is shown. It is a perspective view which shows the state which slid and opened the lid | cover in FIG. FIG. 3 is a perspective view showing a lift handle of FIG. 2. It is a perspective view which expands and shows the locking mechanism of FIG. It is a figure which shows simply a mode when opening the heat insulation cover at the time of opening the cover apparatus of FIG. It is a figure which shows simply the state which raised the lid | cover by the continuation of FIG. FIG. 10 is a diagram simply showing a state in which the lid is slid following FIG. 9. It is a figure which shows the mode of the water stop performance test of the seal ring of FIG. It is sectional drawing which shows other embodiment of the lid | cover apparatus based on this invention, Comprising: The obstruction | occlusion state is shown. It is sectional drawing which shows the state which raised the lid | cover in FIG. It is sectional drawing which shows other embodiment of the lid | cover apparatus which concerns on this invention, Comprising: The obstruction | occlusion state is shown. It is sectional drawing which shows the state which raised the lid | cover in FIG. It is a perspective view which shows the spacer and the guide member of a roller of FIG.

  BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the accompanying drawings.

  1 to 11 show an embodiment of the present invention. In the figure, 1 is an upper opening (entrance / exit) of underground space, and 2 is a lid device.

  The upper opening 1 is formed in a substantially square shape in plan view, and its four corners are rounded.

  The lid device 2 opens and closes the upper opening 1 of the underground space, and includes a base plate 3, a receiving frame 4, a lid 5, a caster 6, an elevating mechanism 7, a lock mechanism 8, two seal rings 9 and 10, and a heat insulating cover. 11 and the like.

  The base plate 3 is laid on the ground around the upper opening 1 of the underground space, and is made of, for example, metal.

  The base plate 3 is fixed by anchor bolts 31a and nuts 31b. Between the base plate 3 and the base around the upper opening 1 of the underground space, a joint material 32 and a water stop plate 33 are provided in order to prevent moisture from penetrating from there.

  The receiving frame 4 is mounted with a lid 5 and is formed of, for example, metal, an appropriate synthetic resin, carbon fiber, or the like.

  The receiving frame 4 is fixed on the base plate 3 by fastening members such as stud bolts 45a and nuts 45b. The receiving frame 4 has a configuration in which an upper plate portion 43 is provided on a lower plate portion 41 in parallel via a rectangular tube portion 42.

  On the upper surface of the upper plate portion 43 of the receiving frame 4, two annular grooves 43a and 43b that open upward are provided concentrically inward and outward in the radial direction. Two seal rings 9, 10 described below are mounted in the two annular grooves 43a, 43b, respectively.

  Further, an annular groove (not shown) is provided on the lower surface of the lower plate portion 41, and an O-ring 46 is attached to the annular groove. The O-ring 46 seals the contact surface between the base plate 3 and the lower plate portion 41. However, when the base plate 3 and the lower plate portion 41 are integrated, the O-ring 46 is not necessary.

  The lid 5 is a plate having an outer shape (for example, a substantially rectangular shape) that can cover the upper opening 1, and reinforcing ribs 51 are attached to the upper surface in a cross shape to prevent elastic deformation. ing. The lid 5 is made of, for example, a metal material, an appropriate synthetic resin, or carbon fiber.

  The caster 6 is for reducing the sliding operation force and smoothing the sliding operation when the lid 5 is slid between the closed position and the open position of the upper opening 1 of the underground space. Are attached via the elevating mechanism 7 at the four corners.

  The caster 6 has a configuration in which a roller 62 is rotatably supported by a support member 61 having an inverted U shape in a side view through a support shaft and a bearing (not shown).

  The elevating mechanism 7 moves the caster 6 toward or away from the lid 5 and includes a guide member 71, a screw shaft 72, a female screw member 73, a lift handle 74, and the like.

  The guide member 71 guides the support member 61 of the caster 6 so as to be linearly displaceable in the vertical direction, and is fixed to the four corners on the lower surface of the lid 5. The guide member 71 is a pair of flat plates that are spaced apart from each other in parallel.

  The screw shafts 72 are inserted through the through holes 52 formed through the four corners of the lid 5 in the thickness direction (vertical direction) so as to protrude upward from the upper surface of the lid 5. A nut 72a as an engaging portion of the lift handle 74 is screwed to the upper end of the screw shaft 72, and the nut 72a is integrated with the screw shaft 72 by a detent pin 72b. .

  The female screw member 73 is fixed by a fastening member such as a bolt (reference numeral omitted) in a state of being fitted in each through hole 52 of the lid 5, and the screw shaft 72 is screwed and inserted therein. The female screw member 73 and the screw shaft 72 constitute a feed screw mechanism.

  The lift handle 74 is for rotating the screw shaft 72 and is detachably engaged with the engaging portion at the upper end of the screw shaft 72.

  As shown in FIG. 6, the lift handle 74 is a combination of a known ratchet type socket wrench 74a and a socket 74b. The socket 74b is provided with a hole having a shape such that the socket 74b is externally fitted with a slight gap in the engaging portion (nut 72a) at the upper end of the screw shaft 72.

  The lock mechanism 8 is for locking the lid 5 on the receiving frame 4 so as not to be separated, and as shown in FIGS. 3 and 7, a T-shaped bolt 81, a lock nut 82, a washer. 83, a long hole 53 of the lid 5, a long hole 44 of the upper plate portion 43 of the receiving frame 4, and the like.

  The T-shaped bolt 81 has an operation pin 81b attached to an upper end of a rod-shaped member 81a having a circular cross section so as to penetrate in a radial direction, and an oblong hook portion 81c is integrally provided at the lower end of the rod-shaped member 81a. ing. The operation pin 81b is arranged so that the center axis thereof is parallel to the center line along the longitudinal direction of the hook portion 81c.

  The lock nut 82 is screwed into the outer diameter side of the thread groove 81d on the outer periphery of the T-shaped bolt 81, and the operation pins 82a are arranged in a straight line at positions facing the outer periphery of the lock nut 82 at 180 degrees. ing.

  The washer 83 is disposed between the upper surface of the lid 5 and the lower surface of the lock nut 82, and has a slight gap in a region from the hook portion 81c of the T-shaped bolt 81 to the position where the lock nut 82 is disposed. It is fitted in a state with

  The oblong hole 53 of the lid 5 and the oblong hole 44 of the upper plate portion 43 of the receiving frame 4 are both formed in an oval shape so that the oval hook portion 81c can be inserted with a sufficient margin. Is provided.

  The two seal rings 9 and 10 are installed in the two annular grooves 43a and 43b of the upper plate portion 43 of the receiving frame 4 to seal between the inner surface of the lid 5 and the upper opening 1 of the underground space. is there. As shown in FIG. 3, these seal rings 9 and 10 are configured such that lips 9 b and 10 b are integrally provided on the upper side of the body portions 9 a and 10 a, and the lips 9 b and 10 b are formed on the lower surface of the lid 5. It is a contact type that is pressed.

  The trunk portions 9a and 10a are press-fitted into the two annular grooves 43a and 43b of the receiving frame 4 and have a rectangular cross section. Portions 9c and 10c are provided. The protrusions 9c and 10c are provided to secure a tightening margin when the body portions 9a and 10a are press-fitted into the annular grooves 43a and 43b.

  The lips 9b and 10b have a shape protruding obliquely toward the outer diameter side toward the lid 5 side that is the contact partner, that is, the upper side, and the thickness gradually decreases toward the tip side.

  The heat insulating cover 11 is formed in a shape that covers the lid device 2 from above, and in this embodiment, the lid 5 is concealed via a hinge 12 on the base plate 3 around the upper opening 1 of the underground space. It is installed so that it can be changed manually between the closed state and the exposed open state.

  A gas spring 25 and a shock absorber (damper) 26 are attached to the heat insulating cover 11 via a frame 24 in order to assist the opening and closing thereof. That is, the load lifted by the gas spring 25 can be reduced when the heat insulating cover 11 is opened, and a damping effect can be obtained in which the shock absorber (damper) 26 is slowly lowered when the heat insulating cover 11 is closed. ing.

  In the closed state, the heat insulating cover 11 cannot be easily opened by fastening members such as the presser plate 13, the stud bolt 14a, and the wing nut 14b.

  The presser plate 13 presses the flange 11a of the heat insulating cover 11 from above, and is provided with elongated holes 13a through which stud bolts 14a are inserted at several places in the longitudinal direction.

  The stud bolt 14 a is implanted in the base plate 3. In addition, the heat insulating cover 11 is provided with a handle 11b for an operator to grasp with a hand.

  When opening the heat insulating cover 11, it is necessary to pull the presser plate 13 away from the flange 11 a of the heat insulating cover 11 by loosening the wing nut 14 b and sliding the presser plate 13.

  Next, the procedure for opening and closing the lid device 2 will be described with reference to FIGS.

  In order to open the closed lid device 2, first, as shown by a two-dot chain line in FIG. 8, the heat insulating cover 11 is opened.

  At this time, the wing nut 14b is loosened and slid so as to pull the holding plate 13, and then the frame 24 of the heat insulating cover 11 is rotated 180 degrees in the direction of the arrow with the hinge 12 (only shown in FIG. 8) as a fulcrum. It arrange | positions in the state turned over in the vicinity of the upper opening 1. However, since the heat insulating cover 11 is supported so as to be rotatable with respect to the frame 24, the heat insulating cover 11 is maintained in the closed state without being turned over.

  Thereafter, the lock mechanism 8 is unlocked. At this time, after loosening the lock nut 82, the T-shaped bolt 81 is turned in the unlocking direction, so that the hook portion 81 c of the T-shaped bolt 81 is inserted into the long hole 53 of the lid 5 and the long hole of the upper plate portion 43 of the receiving frame 4. 44, the T-shaped bolt 81 can be pulled up.

  The operation of making the hook portion 81 c of the T-shaped bolt 81 match the long hole 53 of the lid 5 and the long hole 44 of the upper plate portion 43 of the receiving frame 4 is performed by inserting the operation pin 81 b of the T-shaped bolt 81 into the long hole of the lid 5. Since it is only necessary to match the longitudinal direction of 53, the operation can be performed relatively easily.

  Subsequently, after the lift handle 74 is engaged with the engaging portion (nut 72a) of the screw shaft 72 of the elevating mechanism 7, the lift handle 74 is turned to the tightening side.

  At this time, the screw shaft 72 is screwed deeply into the female screw member 73, but the female screw member 73 is fixed because the caster 6 fixed to the lower end of the screw shaft 72 is stationary on the base plate 3. The fixed lid 5 rises as shown in FIG.

  As a result, the lid 5 rises and is separated from the upper plate portion 43 of the receiving frame 4 and the lips 9b, 10b of the two seal rings 9, 10, and the lid 5 is supported only by the casters 6.

  In this state, when the lid 5 is pushed (or pulled) to the open side by human power, as shown in FIG. 10, the roller 62 rolls and the lid 5 is slid. The whole will be released. Thereby, the cover apparatus 2 will be in an open state. The force for sliding the lid 5 becomes relatively light due to the rolling operation of the casters 6.

  Further, as shown in FIG. 5, the lid 5 slid to the open side is stopped by a stopper 27 at that position, and is made immovable by a lock pin 28.

  The lock pin 28 is inserted across the through hole 54 provided in the lid 5 from the through hole 43c provided in the upper plate portion 43 of the receiving frame 4 (described only in FIG. 10), thereby fixing the lid 5 immovably. It is like that.

  For this reason, when the lid 5 is closed, it is necessary to remove the lock pin 28 from the through holes 54 and 43c.

  Furthermore, in this embodiment, as shown in FIG. 5, when the lid 5 is opened, the seal rings 9 and 10 are partially exposed without being exposed. Therefore, when the seal rings 9 and 10 are replaced, the lid 5 is slid to a position where the entire seal rings 9 and 10 are exposed when the lid 5 is opened by removing the buffer rubber 27b from the stopper base 27a in the stopper 27. It needs to be possible.

  In order to close the lid device 2 thus opened, an operation opposite to the above-described operation may be performed.

  Specifically, the lid 5 is slid toward the closing side and disposed on the upper plate portion 43 of the receiving frame 4, and then the lift handle 74 is turned to the loosening side, whereby the lid 5 is lowered to lower the receiving frame 4. Place on the upper plate portion 43.

  At this time, since the lips 9b and 10b of the two seal rings 9 and 10 are in an inclined posture, the lips 9b and 10b are tilted by the lower surface of the lid 5 and pressed against the lower surface of the lid 5 become. Thereby, high water-stopping performance is exhibited by the two seal rings 9 and 10.

  Thereafter, the hook portion 81c of the T-shaped bolt 81 is inserted into the long hole 53 of the lid 5 and the long hole 44 of the upper plate portion 43 of the receiving frame 4, and then the hook portion 81c is rotated in the forward direction or the reverse direction to thereby move the hook portion 81c. The holes 53 and 44 are orthogonal to each other.

  Subsequently, when the lid 5 and the upper plate portion 43 of the receiving frame 4 are brought into pressure contact with each other by tightening the lock nut 82, the screw shaft 72 can be brought into a non-rotatable locked state. Thereby, the lid 5 cannot be separated from the receiving frame 4, and the lid 5 is immovable while being closed.

  Next, when the frame 24 that has been turned over is rotated so as to return 180 degrees in the opposite direction to the hinge 12 as a fulcrum, the heat insulating cover 11 supported by the frame 24 covers the lid 5. .

  Then, the presser plate 13 is slid so as to be pushed in and superimposed on the flange 11a of the heat insulating cover 11, and then the wing nut 14b is tightened. As a result, the lid device 2 is closed.

  As described above, in the embodiment to which the present invention is applied, the lid 5 is lifted by the elevating mechanism 7 without using the power source, and then the lid 5 is slid by the caster 6 so that the upper opening of the underground space is opened. 1 is open.

  That is, the elevating mechanism 7 is a feed screw mechanism constituted by the screw shaft 72 and the female screw member 73 and is configured to be operated manually by using the lift handle 74. The caster 6 is configured to attach a roller 62 to the lower surface of the lid 5 via a support member 61.

  As described above, the lid device 2 of this embodiment can be opened and closed relatively easily and smoothly while having a relatively simple configuration, and the lid 5 cannot be opened in the event of a power failure. No. Further, since the lift handle 74 is separate from the elevating mechanism 7, it is possible to prevent a third party other than those related to the management of the lid device 2 from opening the lid device 2.

  Moreover, since the two seal rings 9 and 10 are provided with lips 9b and 10b, and the lips 9b and 10b are in contact with the lid 5 in an oblique posture, the lip 9b even if the lid 5 is heavy. , 10b is excellent in durability such as being hard to be crushed, and the lip 9b, 10b can increase the contact pressure to the lid 5 when external pressure is applied, so that the water stop performance is as high as possible. . This makes it possible to prevent inundation of the underground space due to wind and rain or tsunami.

  By the way, in the case of the lid device 2 described above, it is possible to test the water stop performance of the inner seal ring 9.

  That is, as shown in FIG. 11, the outer seal ring 10 of the two seal rings 9 and 10 is removed from the outer annular groove 43b, and instead, the test seal ring 15 is placed in the outer annular groove 43b. Installing.

  The test seal ring 15 has a shape similar to that of the two seal rings 9 and 10, and has a configuration in which a lip 15b protruding toward the oblique inner diameter side is integrally provided on the upper side of the body portion 15a. Although not shown in the drawings, a protrusion that is continuous in the circumferential direction is provided on the inner diameter surface of the body portion 15a.

  The water-stopping performance test is performed between the test seal ring 15 and the inner seal ring 9 facing each other in a state where the test seal ring 15 is mounted in the outer annular groove 43b instead of the outer seal ring 10. A reference water pressure is applied to the sealed space formed by a water pressure application device (not shown), and the gauge 16 determines whether or not the water pressure decreases.

  With such a test, the water-stopping performance test of the inner seal ring 9 can be easily performed regardless of the skill level of the inspection worker, compared with the case where the deterioration degree of the two seal rings 9 and 10 is visually inspected. And it can be done accurately.

  In addition, this invention is not limited only to the said embodiment, It can change suitably in the range equivalent to the claim and the said range.

  (1) In the above embodiment, an example in which the two seal rings 9 and 10 are attached to the receiving frame 4 side and the lips 9b and 10b of the two seal rings 9 and 10 are brought into contact with the lower surface of the lid 5 is taken as an example. However, the present invention is not limited to this.

  For example, two seal rings 9 and 10 can be mounted on the lid 5 side so that the lips 9b and 10b of the two seal rings 9 and 10 are brought into contact with the upper surface of the upper plate portion 43 of the receiving frame 4. .

  Specifically, for example, as shown in FIGS. 12 and 13, a holder plate 17 for mounting two seal rings 9 and 10 is joined to the lower surface of the lid 5.

  Two annular grooves 17a and 17b are concentrically provided on the lower surface of the holder plate 17, and two seal rings 9 and 10 are attached to the two annular grooves 17a and 17b.

  In order to prevent the two seal rings 9 and 10 from falling off, a retaining plate 18 (shown only in FIG. 13) is attached to the lower surface of the holder plate 17 with a countersunk screw (not shown).

  The two seal rings 9 and 10 here are obtained by reversing the seal rings 9 and 10 shown in the above-described embodiment in the upside down direction. Thus, the seal rings 9 and 10 turned upside down are configured such that lips 9b and 10b are integrally provided on the lower side of the body portions 9a and 10a. The lips 9b and 10b have a shape that protrudes obliquely toward the outer diameter side toward the upper plate portion 43 side, that is, the lower side of the receiving frame 4 that is the contact partner, and the thickness gradually decreases toward the tip side. It has become.

  Even in such a case, the same operations and effects as those of the above-described embodiment can be obtained, and the detailed description thereof will be omitted.

  (2) Although the example which provided the raising / lowering mechanism 7 in the cover 5 is given in the said embodiment, this invention is not limited only to this.

  For example, as shown in FIGS. 14 to 16, all casters 6 are attached to the lid 5 via a support pin 19 so as to be vertically displaceable, and the lid 5 is lifted by a jack 20 separate from the lid device 2. The floating state can be maintained by using the spacer 21 while floating from the receiving frame 4.

  Specifically, the support pin 19 is fixed to the upper part of the support member 61 of the four casters 6, and the drop prevention annular plate 19 a is fixed to the upper end of the support pin 19 by a bolt 19 b. .

  The support pins 19 are inserted through through holes 52 provided at the four corners of the lid 5 via gaps, and the annular plate 19 a at the upper end of the support pins 19 is hooked around the upper opening of the through hole 52. It is designed not to fall down.

  As shown in FIG. 16, the spacer 21 has a shape in which a U-shaped recess 21a is provided on a rectangular plate in plan view. To prevent loss, the spacer 21 is interposed via a chain 21b as shown in FIG. Attached to the lid 5.

  On the other hand, the guide member 71 arranged outside the pair of guide members 71 is provided with a notch 71 a for taking in and out the spacer 21.

  In this embodiment, in addition to the above, a bolt 22 for preventing sliding in a state where the lid 5 is not raised is used instead of the lock mechanism 8 shown in FIG.

  Further, the lid 5 of this embodiment is provided with a circular through hole 53a instead of the long hole 53 shown in FIG. 2, and the bolt 22 is inserted through the through hole 53a through a gap. ing. The lower end portion of the bolt 22 protrudes downward from the through hole 53a.

  Further, in the upper plate portion 43 of the receiving frame 4 of this embodiment, a female screw hole 44a is provided instead of the long hole 44 shown in FIG. 2, and the lower end portion of the bolt 22 is provided in the female screw hole 44a. Are to be screwed in.

  For this reason, when the lid 5 is raised, it is necessary to remove the lower end portion of the bolt 22 from the female screw hole 44a of the upper plate portion 43 of the receiving frame 4 and the through hole 53a of the lid 5 in advance. By doing so, the lid 5 can slide.

  On the other hand, when the raised lid 5 is lowered and placed on the receiving frame 4, it is necessary to align the through hole 53 a of the lid 5 with the female screw hole 44 a of the receiving frame 4.

  In this embodiment, in order to open the lid 5, the lid 5 is lifted by the jack 20 to be lifted from the receiving frame 4, and accordingly, the gap is generated between the support member 61 of the caster 6 and the lid 5. When the recess 21 a of the spacer 21 is fitted to the support pin 19 while the spacer 21 is inserted into the separation space, the state where the lid 5 is lifted from the receiving frame 4 is maintained.

  In this way, when the lid 5 is slid, the upper opening 1 of the underground space can be opened.

  In the case of this embodiment, since the jack 20 is separate from the lid 5, it is possible to prevent a third party other than those related to the management of the lid device 2 from opening the lid device 2.

  (3) In the above-described embodiment, the case where the upper opening 1 of the underground space is used as the cover device 2 is taken as an example. However, the present invention is not limited to this example. It is possible to use the upper opening of the space of various structures, such as a structure to be used or a cargo ship of a ship.

  (4) In the above embodiment, the elevating mechanism 7 is a feed screw mechanism including the screw shaft 72 and the female screw member 73. However, the present invention is not limited to this.

  For example, the elevating mechanism 7 can be a ball screw mechanism in which a ball is disposed at a screwed portion between the screw shaft 72 and the female screw member 73, although not shown. In this case, since the turning operation of the lift handle 74 becomes lighter, the work for opening the lid 5 can be performed more easily.

  (5) In the above embodiment, the lift handle 74 is exemplified as a combination of the ratchet type socket wrench 74a and the socket 74b, but the present invention is not limited to this. For example, an operation tool designed exclusively can be used.

  The present invention can be suitably used for a lid device for opening and closing an upper opening of a space.

1 Upper opening of underground space 2 Lid device 4 Receiving frame 43 Upper plate
43a, 43b Annular groove 5 Lid 52 Through-hole 6 Caster 61 Support member 62 Roller 7 Lifting mechanism 71 Guide member 72 Screw shaft 73 Female screw member 74 Lift handle 8 Lock mechanism 81 T-shaped bolt
81a Rod-shaped member
81b Operation pin
81c hook
81d Thread groove 82 Lock nut
82a Operation Pin 83 Washer 9 Inner Seal Ring 9a Body 9b Lip 9c Projection 10 Outer Seal Ring 10a Body 10b Lip 10c Projection 15 Test Seal Ring

Claims (3)

A lid device for opening and closing an upper opening of a space,
An outer lid covering the upper opening;
A roller that is rotatably supported via a support member on the lower side of the lid and reduces an operation force when the lid is slid between the closed position and the open position of the upper opening;
An elevating mechanism for moving the roller up and down relative to the lid;
It is attached to two annular grooves provided concentrically inward and outward in the radial direction on the upper opening side or the lower surface side of the lid so as to surround the upper opening, and is pressed against the lower surface of the lid or the upper opening. And two seal rings of contact type
Both of the seal rings are configured such that a lip projecting obliquely toward the outer diameter side toward the contact partner side is provided on the body portion fitted in the annular groove,
The elevating mechanism is a guide member that is fixed to the lid and guides the support member so as to be vertically movable up and down;
A screw shaft that is fixed to the upper portion of the support member and is inserted through a through hole provided in the lid so as to protrude upward from the upper surface of the lid;
A female screw member that is fitted and fixed in the through hole and the screw shaft is screwed and inserted;
A lid device, comprising: a lift handle that is detachably engaged with and attached to a protruding portion of the screw shaft and rotates the screw shaft. The lid device of claim 1,
Around the upper opening, the lid is placed on the upper surface and a receiving frame having the two annular grooves is installed on the upper surface,
The two seal rings are configured to be in pressure contact with the lower surface of the lid when the lid is closed by being mounted in the two annular grooves of the receiving frame.
A lid device is provided between the lid and the receiving frame, wherein a locking mechanism is provided for switching between a locked state in which the lid cannot be separated from the receiving frame and an unlocked state in which the lid can be separated. . The lid device according to claim 1 or 2,
When testing the water sealing performance of the two seal rings, instead of the outer seal ring, the test seal ring and the test seal ring having a lip protruding obliquely toward the inner diameter side are attached. A lid device characterized in that water pressure is applied by a water pressure applying device to a sealed space between the facing seal ring and an inner seal ring.

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