JP2007169993A - Ditch cover locking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ditch cover locking device facilitating ditch cover attaching/detaching work and capable of completely fixing a ditch cover to a drain ditch channel and easily and visually determining whether the drain ditch is in the fixed state. <P>SOLUTION: A locking piece 29 comprising a front end abutting end 32 that can abut against the lower face of a cover receiving rod (a beam member 10), a turning regulating means for regulating turning relative to a holder 22, and a vertical screw hole 30 screwed to a locking bolt 26, is suspended and supported to the holder 22 by the locking bolt 26 screwed into the screw hole 30 so that the front end abutting end 32 advances/retreats between an advance position to face the lower face of the cover receiving rod (the beam member 10) and a retreat position to retreat from the advance position. The locking piece 29 is lifted by the rotating operation of the locking bolt 26 through its screwing action. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a locking device for immovably holding a groove lid attached to a drainage groove such as a lateral groove provided on a side portion of a road or a transverse groove provided so as to cross the road.

  In general, a groove lid that covers the upper opening of a drainage groove such as a side groove or a transverse groove is formed in the drainage groove with both side edges supported by lid receiving frames respectively disposed on the upper inner edges facing the drainage groove. Removably attached. When such a groove lid is formed using a metal material such as iron or stainless steel, there is slight warping due to an accuracy error at the time of molding, or dust or dirt on the contact surface with the lid receiving frame during use. When foreign objects such as sand are biting in, there is a problem that the groove cover rattles due to the passage of a person or a car and noise is generated, or the groove cover jumps up due to an impact caused by the passage of a car.

  The applicant of the present application has previously proposed a device for preventing the jumping of the groove lid that can eliminate such problems (see Patent Document 1). As shown in FIG. 12, the splash prevention device a has a vertical piece e that is fixed to the bottom of the side edge of the groove lid d supported by the lid receiving frame c of the drainage channel b and is suspended downward. And an elastic pressure contact piece f folded upward from the lower end of the vertical piece e, and draining the elastic pressure contact piece f with the side edge of the groove lid d supported on the lid receiving frame c. By elastically contacting the inner surface g of the groove b, a holding action that does not easily jump up even if an impact is applied to the groove lid d can be obtained.

  On the other hand, in recent years, a pair of left and right lid receiving frames that produce an opening narrower than the upper opening of the drainage channel is disposed at the upper part of the drainage channel, and the opening is narrower than a normal groove lid. Various drainage groove structures that have been covered with a lid have been devised. The narrow groove cover used in such a drainage groove structure is lighter than an ordinary groove cover, and thus is more likely to jump up due to an impact caused by the passage of an automobile. As a countermeasure, a configuration has been proposed in which the groove lid can be fixed to the lid receiving frame by a fastener provided on the lower surface of the groove lid (see Patent Document 2).

In this configuration, as shown in FIGS. 13 and 14, the holding member h is fixed to the lower surface of the groove cover d made of grating, and the lock bolt m is placed in the notch groove k formed in the horizontal piece j of the holding member h. And is rotatably supported. A hook-shaped fixing member p is screwed to the lock bolt m on a shaft portion n protruding downward from the holding member h. In addition, the rising edges s, s of the L-shaped lid receiving frames r, r having an L-shaped cross section disposed in the upper opening of the drainage channel b receive materials t, t for supporting both side edges of the groove lid on the inner side surface Are attached to each other. Here, as shown in FIG. 14, the length of the fixing member p is set to be slightly longer than the mutual distance between the rising edges s and s, and the fixing member p rotates with the rotation operation with respect to the lock bolt m. The rotation restricting action of the fixing member p is obtained by bringing both end portions of the fixing member p to contact the inner side surfaces of the rising edges s and s. When the groove cover d is fixed, both side edges of the groove cover d are supported by the receiving materials t and t, and the fixing bolt p is positioned below the receiving materials t and t. Is rotated in the tightening direction with a tool such as a screwdriver so that both ends of the fixing member p rotating together with the lock bolt m are brought into contact with the inner side surfaces of both rising edges s and s. In the restricted state, by further rotating the lock bolt m, the fixing member p is raised through its screwing action, and both end portions thereof are pressed against the lower surfaces of the receiving materials t and t, so that the groove lid d is It can be fixed. Further, in this fixed state, by rotating the lock bolt m in the loosening direction, first, the fixing member p is lowered through the screwing action, and the both ends of the fixing member p and the lower surfaces of the receiving materials t and t When the pressure contact is released and the lock bolt m is further rotated, the fixing member p can be rotated to be in a fixed release state in which the fixing member p is detached from the receiving materials t and t. Here, the lock bolt m is always held at the same position regardless of whether the groove cover d is in the fixed state or in the fixed release state, and does not move at all.
JP 2002-364060 A Japanese Patent Laid-Open No. 2005-30042

  By the way, in the above-described jump-up prevention device a of Patent Document 1, in order to obtain an elastic contact force with respect to the inner surface g of the drainage groove b, the elastic pressure contact piece portion f is in a non-pressure contact state of the elastic pressure contact piece f. Is provided in such a positional relationship that it protrudes outward from the inner side surface g of the drainage groove b, so that the elastic pressure contact piece f is always elastic to the inner side surface g of the drainage groove b when the groove lid d is attached or detached. Since the sliding is performed in contact, there is a problem that it is difficult to attach and detach the groove lid d due to the sliding resistance generated at that time. Further, since the groove lid d is held in the drainage groove b only by the elastic contact force of the elastic pressure contact piece f with respect to the inner surface g of the drainage groove b, it is possible to obtain a complete fixing action of the groove lid d. could not.

  Further, in the configuration disclosed in Patent Document 2, the groove lid d can be fixed to the lid receiving frames r and r by the pressure contact action of the fixing member p against the lower surfaces of the receiving materials t and t. Since the lock bolt m rotates at the same position, when the lock bolt m is loosened and the fixing member p is detached from the receiving materials t and t due to vibration caused by passage of an automobile or the like, the lock bolt m is removed. It was extremely difficult to judge by looking at the position of. Further, in order to obtain the rotation restricting action, the fixing member p is set to have a dimension slightly longer than the mutual interval between the rising edges s, s of the lid receiving frames r, r, so that both end portions are both rising edges s. , S in the state of contact with the inner side surface, as shown in FIG. 14, in a plan view, it is inclined with respect to both rising edges s, s. However, as described above, even when the lock bolt m is loosened and the fixing member p rotates in the fixing release direction, and the fixing member p is slightly separated from the receiving materials t and t, the fixing member p is Since both the rising edges s and s are inclined, it is difficult to determine whether or not the fixing member p is in a fixed state at the position of the fixing member p. Since most of the horizontal piece j is hidden, State whether or not the decision has become even more difficult.

  The present invention eliminates the difficulty of attaching and detaching the groove cover due to the above-described sliding resistance, and can completely fix the groove cover to the drainage channel, and whether or not the groove cover is in a fixed state. It is an object of the present invention to provide a groove lid locking device that can easily determine whether or not this is visually.

  The present invention provides a groove lid that is mounted on a lid receiving member horizontally mounted between the left and right support frames disposed in the upper part of the drainage channel and covers the opening between the left and right support frames. A locking device for immovably holding the receptacle, comprising a main plate portion having a long hole with a predetermined length along a direction substantially orthogonal to the lid receptacle, the main plate portion being a lower portion of the groove lid A holder disposed substantially horizontally at a position, and supported by a large-diameter operation head that is inserted into the long hole of the holder from above and engages with the upper hole edge of the long hole, and above the groove lid A lock bolt whose rotation range is restricted by the long hole and the movement range along the longitudinal direction of the long hole is regulated, a contact end portion of the front end capable of contacting the lower surface of the lid receiving rod, and rotation with respect to the holder A rotation restricting means for restricting and a vertical screw hole to be screwed with the lock bolt, and screwed into the screw hole. It is suspended from the holder by the lock bolt, and the abutting end portion of the front end faces the lower surface of the lid receiving rod, and advances and retracts between the retracted position retracted from the advanced position, and by rotating the lock bolt, A locking device for a groove lid, comprising: a locking piece provided so as to move up and down through the screwing action.

  Here, the left and right support frames disposed in the upper part of the drainage channel form an opening that is narrower than the upper opening of the drainage channel, and the left and right rises are coupled to at least one horizontal edge. Both rising edges are opposed to each other at a predetermined interval in the upper part of the groove, and a narrow opening is formed between the rising edges, and the remaining groove is formed by the horizontal edge of the support frame. It is preferable that the upper portion of the road is covered and the both support frames are connected by a plurality of beam members arranged at predetermined intervals in the longitudinal direction of the support frame, and each of the beam members has a horizontal edge of the support frame. The left and right ends of each beam member are disposed on the upper surface of the left and right side walls constituting the groove, and the horizontal edge of both support frames or the horizontal edge of one support frame and the other A configuration in which it is mounted via the rising edge of the support frame is preferable. Further, the horizontal edge of the support frame is mounted on each beam member, and the left and right ends of each beam member are mounted on the upper end surfaces of the left and right side walls constituting the groove. Good.

  Further, the present invention is provided for holding a groove lid that covers an upper opening of a drainage channel so as to be immovable on the lid receiving frame, the side edge of which is supported by a lid receiving frame disposed on the upper inner edge of the drainage channel. The locking device includes a main plate portion having a long hole having a predetermined length along a direction substantially orthogonal to the lid receiving frame, and the main plate portion is arranged substantially horizontally at a lower position near the side edge of the groove lid. A holder provided, and supported by a large-diameter operation head that is inserted into the long hole of the holder from above and engages with an upper hole edge of the long hole, and can be rotated from above the groove lid; A lock bolt in which the movement range along the longitudinal direction of the long hole is restricted by the long hole, a contact end portion of the front end that can come into contact with the lower surface of the lid receiving frame, and a rotation restricting means for restricting rotation with respect to the holder; A screw hole in a vertical direction screwed with the lock bolt, and a lock screwed into the screw hole. It is suspended from the holder by a bolt, and the forward end of the contact end of the front end faces the lower surface of the lid receiving frame and the retracted position retracted from the advanced position, and the screw is rotated by rotating the lock bolt. A groove lid locking device comprising: a locking piece provided so as to move up and down through an advancement action.

  Further, in the lock device having the both configurations, the upper surface of the main plate portion is provided with a lock release restricting protrusion that comes into contact with the operation head of the lock bolt at the advance position of the lock piece from behind to hold the lock piece in the advanced position. A configuration is proposed.

  As described above, the present invention includes a main plate portion in which a long hole having a predetermined length along a direction substantially orthogonal to the lid receiving rod is formed, and the main plate portion is disposed substantially horizontally at a lower position of the groove lid. The holder is inserted into the long hole of the holder from above and supported by a large-diameter operation head that engages with the upper hole edge of the long hole. A lock bolt whose movement range along the longitudinal direction of the elongated hole is regulated by the hole, a contact end portion of a front end capable of contacting the lower surface of the lid receiving rod, and a rotation regulating means for regulating rotation with respect to the holder; A vertical screw hole that is screwed with the lock bolt, and is suspended from the holder by the lock bolt screwed into the screw hole, with the abutting end of the front end facing the lower surface of the lid receiving rod Advancing and retreating between the advancing position to be retreated and the retreating position for retreating from the advancing position, and rotating the lock bolt The lock piece is provided with a lock piece provided so as to be moved up and down through its screwing action, so that the lock piece is advanced from the retracted position by moving forward with respect to the lock bolt. A locked state in which the lock piece is lifted through its screwing action and the abutting end is pressed against the lower surface of the lid receiving rod by the rotational operation in the tightening direction with respect to the lock bolt. When the lock bolt is rotated in the relaxed direction in the locked state, the lock piece is lowered through the screwing action so that the pressure contact between the contact end and the lid receiving member is released, and the lock bolt is moved backward. An unlocked state in which the lock piece is converted into the retracted position can be generated by the operation. In the locked state, the abutment end is pressed against the lower surface of the lid receiving member, so that the groove lid is held immovably with respect to the lid receiving member. A reliable fixing action that does not cause sticking or jumping can be obtained. Further, since the groove lid can be attached and detached in the unlocked state, the elastic pressure contact piece f (see FIG. 12) is always in elastic contact with the inner surface of the drainage channel when the groove lid is attached / detached as in the prior art. The sliding resistance due to sliding does not occur, and the attaching / detaching work can be easily performed. Also, unlike the conventional case where the lock bolt m (see FIG. 14) always maintains the same position, the lock bolt advances and retreats together with the lock piece. Therefore, in the locked state, the lock bolt should be loosened and locked. When the piece is retracted and the lock is released, the lock bolt is also retracted together with the lock piece, so that it is possible to easily determine visually whether the groove cover is in a fixed state or not by the position of the lock bolt. it can.

  Further, the present invention includes a main plate portion having a long hole having a predetermined length along a direction substantially orthogonal to the lid receiving frame, and the main plate portion is disposed substantially horizontally at a lower position near the side edge of the groove lid. The holder is inserted into the long hole of the holder from above and supported by a large-diameter operation head that engages with the upper hole edge of the long hole. A lock bolt in which the movement range along the longitudinal direction of the elongated hole is regulated by the hole, a contact end portion of the front end capable of contacting the lower surface of the lid receiving frame, and a rotation regulating means for regulating rotation with respect to the holder; An up-and-down screw hole that is screwed to the lock bolt, and is suspended from the holder by a lock bolt screwed into the screw hole, so that the abutting end of the front end faces the lower surface of the lid receiving frame. Between the position and the retracted position retracted from the advanced position, and the rotation of the lock bolt Since the locking device for the groove lid is provided with a locking piece provided so as to be moved up and down through its screwing action, the locking piece is moved forward with respect to the locking bolt in the same manner as described above. A locked state in which the lock piece is raised through the screwing action and the contact end is pressed against the lower surface of the lid receiving frame when the lock bolt is rotated from the retracted position to the advanced position and rotated in the tightening direction with respect to the lock bolt. Then, when the lock bolt is rotated in the locking state in the loosening direction, the lock piece is lowered through the screwing action so that the pressure contact between the abutting end and the lid receiving frame is released, and the lock bolt is moved backward with respect to the lock bolt. The unlocking state in which the lock piece is converted into the retracted position can be caused by the moving operation. In the locked state, the abutment end is pressed against the lower surface of the lid receiving frame, so that the groove lid is held immovably with respect to the lid receiving frame. It is possible to obtain a reliable fixing action that does not cause jumping. Further, since the groove lid can be attached and detached in the unlocked state, the elastic pressure contact piece f (see FIG. 12) is always in elastic contact with the inner surface of the drainage channel when the groove lid is attached / detached as in the prior art. The sliding resistance due to sliding does not occur, and the attaching / detaching work can be easily performed. Also, unlike the conventional case where the lock bolt m (see FIG. 14) always maintains the same position, the lock bolt advances and retreats together with the lock piece. Therefore, in the locked state, the lock bolt should be loosened and locked. When the piece is retracted and the lock is released, the lock bolt is also retracted together with the lock piece, so that it is possible to easily determine visually whether the groove cover is in a fixed state or not by the position of the lock bolt. it can.

  Further, in the lock device having the both configurations, the upper surface of the main plate portion is provided with a lock release restricting protrusion that comes into contact with the operation head of the lock bolt at the advance position of the lock piece from behind to hold the lock piece in the advanced position. In the locked state, even if the lock bolt is loosened in the locked state, the lock bolt is prevented from moving backward by the lock release restricting projection that is in contact with the operation head of the lock bolt from the rear. By being held at the advanced position, it is possible to prevent an immediate unlocking state.

Below, the 1st Example of the locking device of the groove cover concerning this invention is described based on FIGS. 1-3.
As shown in FIG. 1, the drainage channel 1 in the first embodiment has a plurality of channel members composed of U-shaped grooves formed in a substantially U-shaped cross section by a bottom wall 3 and left and right side walls 4, 4. 2 are embedded in a row at a predetermined depth position of the ground.

  A pair of left and right support frames 5, 5 each having a horizontal edge 7 coupled to a vertical rising edge 6 are disposed above the drainage channel 1. The rising edges 6 and 6 of the support frames 5 and 5 are arranged to face each other at a predetermined interval in the approximate center of the upper part of the drainage channel 1, and the upper opening of the drainage channel 1 is formed between the rising edges 6 and 6. A narrower opening 8 is formed. Further, the upper opening of the drainage channel 1 other than the opening 8 is shielded by the horizontal edges 7 and 7 of the both support frames 5 and 5. Both support frames 5 and 5 are made of a plate-like metal material made of steel or stainless steel, and the length thereof is a predetermined length along the longitudinal direction of the drainage channel 1. As shown in FIG. 1, the rising edge 6 and the horizontal edge 7 of each support frame 5 may be formed by bending one metal plate into an L-shaped cross section, or welding two metal plates. It is also possible to bond and form so as to have an L-shaped cross section.

  The left and right support frames 5 and 5 are connected by a plurality of beam members 10 disposed at predetermined intervals in the longitudinal direction of the support frames 5 and 5. In this first embodiment, the left and right support frames 5 and 5 A lid receiving member is provided between the support frames 5 and 5. Here, each beam member 10 is disposed at a position corresponding to at least the vicinity of both ends in the longitudinal direction of a groove lid 18A described later. Each beam member 10 is made of a metal square pipe having excellent strength, and the length thereof is a predetermined length that protrudes slightly outward from the outer surfaces 11, 11 of the left and right side walls 4, 4 constituting the drainage channel 1. It has become. Each beam member 10 is disposed in contact with the upper surfaces of the horizontal edges 7 and 7 of the support frames 5 and 5, and is inserted into insertion holes 12 and 12 formed in the rising edges 6 and 6 of the support frames 5 and 5. In this state, the horizontal edges 7 and 7 or the horizontal edges 7 and 7 and the edges of the insertion openings 12 and 12 are joined by welding. The left and right ends of each beam member 10, in which the left and right support frames 5, 5 are immovably connected, are placed on the upper end surfaces of the left and right side walls 4, 4 constituting the drainage channel 1. , 5 through horizontal edges 7, 7.

  In addition, fixing rods 13 joined by welding are suspended downward at both ends of each beam member 10 along the outer surfaces 11 and 11 of the side walls 4 and 4 of the drainage channel 1, respectively. A fixing screw 14 is screwed into the fixing rod 13 from the outside. Then, by rotating the fixing screw 14 in the tightening direction to bring the tip of each fixing screw 14 into pressure contact with the outer surfaces 11, 11 of the side walls 4, 4, the beam member 10 and the support are supported via the tightening action. The frames 5 and 5 are fixed to the side walls 4 and 4 of the drainage channel 1. And in such a fixed state, the pavement material 17 which consists of the concrete 15 and the decorative tile 16 which are laid in the upper periphery periphery of the drainage channel 1 on the horizontal edges 7 and 7 of the left and right support frames 5 and 5 is continuous. Is laid.

  A groove lid 18 </ b> A is disposed in the opening 8 formed between the rising edges 6 and 6. The groove lid 18A includes a plurality of main bars 19 arranged in parallel at predetermined intervals along the longitudinal direction of the support frames 5 and 5, and an appropriate number of cross bars 20 (see FIG. 2) orthogonal to the main bars 19. It is made of a metal grating and is detachably mounted on the upper surface of each beam member (lid receiving rod) 10 exposed at the opening 8. In addition, the mutual space | interval of each main bar 19 is set to the predetermined space | interval which can penetrate the axial part of a driver from the upper direction at least. Further, the groove lid 18A is formed to be narrower than a groove lid 18B (see FIG. 7) of the fifth embodiment to be described later, as compared with the one covering the entire upper opening of the drainage channel 1. It is easy to jump up due to the impact of automobile traffic.

  Locking devices 21 according to the main part of the present invention are disposed at positions corresponding to the beam member 10 at least in the vicinity of both ends in the longitudinal direction of the groove lid 18A. As shown in FIGS. 2 and 3, the locking device 21 is formed in a U-shaped cross section by a main plate portion 23 and a pair of side plate portions 24, 24 extending upward from both front and rear end edges of the main plate portion 23. The main plate portion 23 is arranged substantially horizontally at the lower position of the groove lid 18A by welding the upper ends of the side plate portions 24, 24 to the bottom surface of the groove lid 18A by welding. . The main plate portion 23 is formed with a long hole 25 having a predetermined length along a direction substantially orthogonal to the beam member 10 constituting the lid receiving member, and a lock bolt 26 is inserted into the long hole 25 from above. Yes.

  The lock bolt 26 is supported by a large-diameter operation head 27 that engages with the upper hole edge of the long hole 25, and can be rotated from above the groove lid 18 </ b> A. The range of movement along the longitudinal direction is regulated. Further, the lock bolt 26 is located in a gap formed between the adjacent main bars 19 and 19 of the grating that constitutes the groove lid 18A, so that a rotation operation and a movement operation from above the groove lid 18A can be performed. It is possible.

  The male screw collar portion 28 of the lock bolt 26 that hangs from the long hole 25 of the main plate portion 23 is screwed into a vertical screw hole 30 formed in the lock piece 29, whereby the lock piece 29 is locked into the lock bolt 26. Is suspended by the holder 22. A U nut 31 having a locking function is screwed to the lower end portion of the male screw collar portion 28 that protrudes downward from the lock piece 29, and the male screw collar portion of the lock bolt 26 is secured by the U nut 31. The lock piece 29 does not fall off from 28. It should be noted that the means for preventing the lock piece 29 from falling off can be provided by fixing a normal nut to the male screw collar portion 28 by welding instead of the U nut 31.

  The lock piece 29 is provided with a contact end portion 32 that can contact the lower surface of the beam member 10 constituting the lid receiving member at the front end, and the contact end portion 32 is moved to the lock bolt 26 by the forward / backward operation. The advancing position (see FIGS. 2A and 3A) facing the lower surface of the beam member 10 constituting the ridge, and the retreating position (FIGS. 2B and 3B) retreating from the advanced position And the like, and is moved up and down through a screwing action by a rotational operation on the lock bolt 26. Here, the rear end of the lock piece 29 is provided with a rising end 33 which abuts against the end surface 22 ′ on the rear side of the holder 22 at the advanced position and generates a rotation restricting action. Thus, a rotation restricting means for restricting the rotation of the lock piece 29 relative to the holder 22 is configured.

  Further, on the upper surface of the main plate portion 23, there is provided a lock release restricting projection 34 that abuts the operation head 27 of the lock bolt 26 at the advance position of the lock piece 29 from the rear and holds the lock piece 29 in the advanced position. ing. The unlocking restricting projections 34 are provided as a pair on the left and right sides of the long hole 25, and the height of the unlocking restricting projections 34 abuts the periphery of the operating head 27 when the operating head 27 is in a horizontal state. It has a predetermined height (about 2 mm) that prevents movement and allows the operating head 27 to ride over in an inclined state. The unlocking restricting protrusion 34 can be provided as necessary.

  In such a configuration, the lock pieces 29 of the respective lock devices 21 disposed at least in the vicinity of both ends in the longitudinal direction of the groove lid 18A are retracted as shown in FIGS. 2 (b) and 3 (b). 2 (a), FIG. 2 (a), and FIG. 2 (a), FIG. 2 (a) and FIG. 2 (b), by engaging the tip of the driver 35 with the operating head 27 of each lock bolt 26 and moving the lock bolt 26 forward by the driver 35. As shown in FIG. 3A, the lock piece 29 is converted from the retracted position to the advanced position. At this time, when the unlocking restricting protrusion 34 is provided on the upper surface of the main plate portion 23, the driver head 35 is tilted backward while being engaged with the operation head 27 of the lock bolt 26, thereby operating the operation head. Since 27 is inclined and the front side is lifted from the upper surface of the main plate part 23, it can be easily moved forward over the lock release restricting projection 34. Then, by rotating the lock bolt 26 in the tightening direction at the advancing position where the abutting end portion 32 of the lock piece 29 is opposed to the lower surface of the beam member 10 constituting the lid receiving member, the screwing action is achieved. As a result, the lock piece 29 is lifted through and the abutting end 32 is pressed against the lower surface of the beam member 10 to obtain a locked state. In this locked state, the abutment end portion 32 of the lock piece 29 is pressed against the lower surface of the beam member 10, so that the groove lid 18A is held immovably. As a result, the groove lid 18A has a backlash. It is possible to obtain a reliable fixing action that does not cause any jumping.

  In the locked state, when the lock bolt 26 is rotated in the loosening direction by the driver 35, the lock piece 29 is lowered through the screwing action so that the contact end portion 32 and the beam member 10 are pressed against each other. Canceled. Then, when the lock bolt 26 is moved backward by the driver 35, the lock piece 29 is converted from the advanced position to the retracted position as shown in FIGS. 2 (b) and 3 (b). Become. At this time, when the unlocking restricting projection 34 is provided on the upper surface of the main plate portion 23, the operation head is tilted forward while the driver 35 is engaged with the operation head 27 of the lock bolt 26. Since 27 is inclined and the rear side is lifted from the upper surface of the main plate portion 23, it can be easily moved backward over the lock release restricting projection 34. Since the groove lid 18A can be attached and detached in this unlocked state, the elastic pressure contact piece f (see FIG. 12) slides in a state in which it is always in elastic contact with the inner side surface of the drainage channel as in the prior art. There is no sliding resistance, and the attaching / detaching work can be performed easily.

  Further, unlike the conventional case where the lock bolt m (see FIG. 14) always maintains the same position, the lock bolt 26 advances and retreats together with the lock piece 29. When the lock piece 29 is loosened and the lock piece 29 is retreated and the lock is released, the lock bolt 26 is also retreated together with the lock piece 29. Therefore, whether or not the groove lid 18A is in a fixed state is determined by the position of the lock bolt 26. It can be easily judged visually.

  Further, when the unlocking restricting projection 34 for holding the lock piece 29 in the advanced position is provided on the upper surface of the main plate portion 23, even if the lock bolt 26 is loosened due to vibration or impact, the operation head 27 can be seen from the rear. By preventing the lock bolt 26 from retreating by the lock release restricting protrusion 34 that is in contact, the lock piece 29 can be prevented from being immediately brought into the unlocked state.

  By forming the lock piece 29 using spring steel as a material, when the lock bolt 26 is further tightened in the locked state in which the contact end portion 32 is pressed against the lower surface of the beam member 10, the lock piece 29 Since the center part is elastically deformed so as to bend upward, an elastic force is generated, so that the lock bolt 26 is difficult to loosen.

  In the first embodiment, the opening 8 narrower than the opening width of the drainage channel 1 is formed in the approximate center of the upper part of the drainage channel 1, and the groove lid 18 </ b> A covering the opening 8 is attached by the lock device 21. Although the structure to be fixed has been described, instead of this, as in the second embodiment shown in FIG. 4, the opening 8 is formed at a position biased to the uppermost side of the drainage channel 1, and the opening It is also possible to fix the groove lid 18 </ b> A covering 8 by the lock device 21. In addition, the same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and redundant description is omitted.

  Moreover, in the said 1st Example and 2nd Example, the height of the rising edges 6 and 6 of the support frames 5 and 5 is suitable so that it may be suitable for the construction which lays the pavement material 17 which consists of the concrete 15 and the decorative tile 16. FIG. However, instead of this, as in the third embodiment shown in FIG. 5, the rising edges 6 and 6 are suitable for the construction of laying the pavement material 17 composed of the sand 36 and the decorative block 37. 6 may be set high. In this case, the groove lid 18 </ b> A covering the opening 8 between the two rising edges 6, 6 is placed on the raising rod 38 that is horizontally placed between the both rising edges 6, 6. Will be constructed.

  FIG. 6 shows a fourth embodiment, which is formed by extending a long hole 25 formed in the main plate portion 23 to a predetermined height position of one side plate portion 24 in series. is there. In addition, the same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and redundant description is omitted.

  In such a configuration, the locking piece 29 is rotated 90 degrees horizontally from the state shown in FIG. 6A, and as shown in FIG. By moving 28 into the side plate portion 24 along the long hole 25, the lock bolt 26 and the lock piece 29 can be laid down along the lower surface of the groove lid 18A. In addition, this recumbent state can be hold | maintained using convenient fixing members (illustration omitted), such as a gummed tape. As a result, when packing and transporting the groove lid 18A, the lock bolt 26 and the lock piece 29 do not protrude downward, and the groove lid 18A can be made substantially flat, so that it is easy to handle and transport efficiency. Can be improved.

  FIGS. 7 to 10 show a fifth embodiment. The drainage channel 1 in this fifth embodiment is constructed of concrete placed in a substantially U-shaped cross section at a predetermined depth position of the ground. As shown in FIG. 7, a substantially L-shaped lid receiving frame 39 made of a metal angle member is disposed along the longitudinal direction of the drainage channel 1 on the upper inner edge of the channel 1 facing each other. On the lower surface of the horizontal lid receiving edge 39a of the lid receiving frame 39, an approximate opening that opens toward the inside of the drainage channel 1 at a position corresponding to at least two diagonal portions of the groove lid 18B described later. Box-shaped surrounding frame bodies 40 are joined to each other by welding, and the surrounding frame body 40 is provided with an insertion gap 41 at a lower portion of the lid receiving frame 39. The fitting gap 41 can also be formed directly in the concrete below the lid receiving frame 39 using a punching die, and when the locking device 21 is retrofitted to an existing groove lid, It can be formed by holding the concrete below the lid receiving frame 39.

  A groove lid 18B that covers the entire upper opening of the drainage channel 1 is detachably attached to the drainage channel 1 with the side edges supported by the lid receiving frames 39 on both sides. The groove lid 18B is made of metal grating, and as shown in FIG. 9, a plurality of main bars 42 arranged in parallel at a predetermined interval along a direction orthogonal to the lid receiving frame 39, and at both end portions of each main bar 42 The side bars 43 are respectively passed along the main bars 42 and the appropriate number of cross bars 44 are passed at a predetermined interval orthogonal to the main bars 42. In addition, the mutual space | interval of each main bar 42 is set to the predetermined space | interval which can penetrate the main board part 23 of the locking device 21 from upper direction, as shown in FIG.

  Locking devices 21 are disposed at positions corresponding to the respective insertion gaps 41 at at least two corner portions of the groove lid 18B having a diagonal relationship. As shown in FIG. 10, the locking device 21 includes a holder 22 formed in a U-shaped cross section by a main plate portion 23 and a pair of side plate portions 24, 24 extending upward from both left and right edges of the main plate portion 23. Further, support edge portions 24a and 24a extending horizontally outward are coupled to the upper ends of the side plate portions 24 and 24, respectively. Then, the holder 22 is inserted between the adjacent main bars 42, 42 from above, and the support edges 24a, 24a are engaged with the support edges 24a, 24a on the upper surfaces of the main bars 42, 42. And the main bars 42, 42 are joined by welding, so that the main plate portion 23 is disposed substantially horizontally at a lower position of the groove lid 18B. A long hole 25 having a predetermined length along a direction substantially orthogonal to the lid receiving frame 39 is formed in the main plate portion 23, and a lock bolt 26 is inserted into the long hole 25 from above.

  Similarly to the first embodiment, the male screw collar portion 28 of the lock bolt 26 is screwed into a vertical screw hole 30 formed in the lock piece 29, so that the lock piece 29 is locked by the lock bolt 26. It is suspended by the holder 22. The lock piece 29 is provided with a contact end portion 32 that can contact the lower surface of the lid receiving frame 39 at the front end, and the contact end portion 32 faces the lower surface of the lid receiving frame 39 by an advance / retreat operation with respect to the lock bolt 26. Advancing and retreating between the advancing position (see FIG. 7) and the retreating position (see FIG. 8) retreating from the advancing position, and ascending / descending via the screwing action by the rotation operation on the lock bolt 26 Is provided. Here, at the rear end of the lock piece 29, as shown in FIG. 7, a rising end portion 33 is provided that abuts against the end surface 22 ′ on the rear side of the holder 22 at the advanced position and generates a rotation restricting action. The rising end portion 33 constitutes a rotation restricting means for restricting the rotation of the lock piece 29 relative to the holder 22.

  Further, on the upper surface of the main plate portion 23, there is a need for a lock release restricting protrusion 34 that abuts the operation head 27 of the lock bolt 26 at the advanced position of the lock piece 29 from the rear and holds the lock piece 29 in the advanced position. It is provided according to. In addition, the same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and redundant description is omitted.

  In this configuration, the lock pieces 29 of the respective lock devices 21 respectively disposed at at least two corner portions of the groove lid 18B that are in a diagonal relationship are in the unlocked state at the retracted position as shown in FIG. By engaging the tip of the driver 35 with the operation head 27 of each lock bolt 26 and moving the lock bolt 26 forward by the driver 35, the lock piece 29 is moved from the retracted position as shown in FIG. Converted to advance position. At this time, when the unlocking restricting protrusion 34 is provided on the upper surface of the main plate portion 23, the driver head 35 is tilted backward while being engaged with the operation head 27 of the lock bolt 26, thereby operating the operation head. Since 27 is inclined and the front side is lifted from the upper surface of the main plate part 23, it can be easily moved forward over the lock release restricting projection 34. In this way, by rotating the lock bolt 26 in the tightening direction at the advancing position where the abutting end portion 32 of the lock piece 29 faces the lower surface of the lid receiving frame 39, the lock piece 29 is rotated via its screwing action. As a result, the contact end portion 32 is brought into pressure contact with the lower surface of the lid receiving frame 39, and a locked state is obtained. In this locked state, the abutting end portion 32 of the lock piece 29 is pressed against the lower surface of the lid receiving frame 39, so that the groove lid 18B is held immovable. It is possible to obtain a reliable fixing action that does not cause any jumping.

  Further, in the locked state, when the lock bolt 26 is rotated in the loosening direction by the driver 35, the lock piece 29 is lowered through the screwing action so that the contact end portion 32 and the lid receiving frame 39 are pressed against each other. Canceled. Then, by operating the lock bolt 26 to move backward by the driver 35, the lock piece 29 is converted from the advanced position to the retracted position as shown in FIG. At this time, when the unlocking restricting projection 34 is provided on the upper surface of the main plate portion 23, the operation head is tilted forward while the driver 35 is engaged with the operation head 27 of the lock bolt 26. Since 27 is inclined and the rear side is lifted from the upper surface of the main plate portion 23, it can be easily moved backward over the lock release restricting projection 34. Then, since the groove lid 18B can be attached and detached in this unlocked state, the elastic pressure contact piece f (see FIG. 12) slides in a state in which it is always elastically in contact with the inner side surface of the drainage channel as in the prior art. There is no sliding resistance, and the attaching / detaching work can be performed easily.

  Further, unlike the conventional case where the lock bolt m (see FIG. 14) always maintains the same position, the lock bolt 26 advances and retreats together with the lock piece 29. When the lock piece 29 is loosened and retreated, and the lock is released, the lock bolt 26 is also retreated together with the lock piece 29, so whether or not the groove cover 18B is in a fixed state depending on the position of the lock bolt 26. It can be easily judged visually.

  Further, when the unlocking restricting projection 34 for holding the lock piece 29 in the advanced position is provided on the upper surface of the main plate portion 23, even if the lock bolt 26 is loosened due to vibration or impact, the operation head 27 can be seen from the rear. By preventing the lock bolt 26 from retreating by the lock release restricting protrusion 34 that is in contact, the lock piece 29 can be prevented from being immediately brought into the unlocked state.

  In this second embodiment, the holder 22 is configured so that it can correspond to two mounting modes when the locking device 21 is retrofitted to an existing groove lid or when the locking device 21 is pre-attached when the groove lid 18B is manufactured. The side plates 24, 24 are elongated in the vertical direction, and the horizontal support edges 24a, 24a are coupled to the upper ends of the side plates 24, 24. It is also possible to join the upper ends of the side plate portions 24, 24 to the bottom surface of the groove lid 18B by welding. Moreover, although the locking device 21 is disposed at the two corner portions having a diagonal relationship with the groove lid 18B, it may be disposed at each of the four corner portions of the groove lid 18B instead.

  Further, the groove lid 18B does not necessarily have to be a grating, and may be a filling groove lid provided with a box frame 46 that can be filled with a paving material 45 as shown in FIG. In this case, the operation port 47 is opened in the bottom wall of the box frame 46, the lock device 21 is disposed below the operation port 47, and a detachable cap that surrounds the upper portion of the operation port 47. A cannula 49 having a body 48 is erected on the bottom wall.

  Furthermore, the locking device 21 according to the present invention can also be used when fixing the ends of the groove lids made of gratings arranged in a line.

It is a longitudinal cross-sectional view which shows the construction state of 18 A of groove covers provided with the locking device 21 concerning a 1st Example. (A) is a top view of the principal part which shows the state in which the lock piece 29 exists in an advance position, (b) is a top view of the principal part which shows the state in which the lock piece 29 exists in a retracted position. (A) is a sectional side view of the main part showing a state in which the lock piece 29 is in the advanced position, and (b) is a side sectional view of the main part showing a state in which the lock piece 29 is in the retracted position. It is a longitudinal cross-sectional view which shows the construction state of a 2nd Example. It is a longitudinal cross-sectional view which shows the construction state of a 3rd Example. 4 shows a locking device 21 according to a fourth embodiment, in which (a) is a longitudinal sectional view of the locking device 21, and (b) is an operation explanatory diagram in a state where a lock bolt 26 and a lock piece 29 are lying down. It is a longitudinal cross-sectional view of the construction state which shows the state which the lock piece 29 of the locking device 21 concerning 5th Example exists in an advance position. It is action | operation explanatory drawing of the state which has the lock piece 29 of the locking device 21 same as the above in the retracted position. It is a top view of the groove cover 18B provided with the locking device 21 same as the above. It is side sectional drawing of the groove cover 18B provided with the locking device 21 same as the above. It is a longitudinal cross-sectional view of the construction state which shows the structure at the time of making the groove cover 18B into a filling type groove cover. It is a longitudinal cross-sectional view which shows the construction state of the groove cover d provided with the conventional splash prevention apparatus a. It is a longitudinal cross-sectional view which shows the construction state of the groove cover d provided with the conventional fastener. It is a top view of the principal part in a fastener same as the above.

Explanation of symbols

1 Drainage channel 5 Support frame 10 Beam member (lid receptacle)
18A, 18B Groove lid 21 Lock device 22 Holder 23 Main plate portion 25 Long hole 26 Lock bolt 27 Operation head 29 Lock piece 30 Screw hole 32 Abutting end portion 33 Standing end portion (rotation restricting means)
34 Unlocking restricting projection 38 Raised hook (lid holder)
39 Cover frame

Claims (3)

Move the groove lid that is mounted on the lid holder horizontally mounted between the left and right support frames disposed in the upper part of the drainage channel and covers the opening between the left and right support frames to the lid receptacle A locking device for impossible holding,
A main plate part formed with a long hole of a predetermined length along a direction substantially orthogonal to the lid receiving rod, the main plate part being disposed substantially horizontally at the lower position of the groove cover;
The long hole of the holder is inserted from above, supported by a large-diameter operation head that engages with the upper hole edge of the long hole, and can be rotated from above the groove lid. A lock bolt whose movement range along the longitudinal direction of the
A front end abutting end capable of abutting on the lower surface of the lid receiving member, a rotation restricting means for restricting the rotation with respect to the holder, and a vertical screw hole screwed with the lock bolt; The lock bolt that is screwed into the hole is suspended by the holder, and the abutting end portion of the front end advances and retreats between a retracted position that retreats from the advanced position and a retracted position that retreats from the advanced position. A locking device for a groove lid, comprising: a lock piece provided so as to be lifted and lowered by a screwing operation of a bolt. A lock device for holding a groove lid, which is supported by a lid receiving frame disposed on an upper inner edge of the drainage channel, and that covers the upper opening of the drainage channel, in an immovable manner on the lid receiving frame,
A holder provided with a main plate portion having a long hole of a predetermined length along a direction substantially orthogonal to the lid receiving frame, the main plate portion being disposed substantially horizontally at a lower position near the side edge of the groove lid;
The long hole of the holder is inserted from above, supported by a large-diameter operation head that engages with the upper hole edge of the long hole, and can be rotated from above the groove lid. A lock bolt whose movement range along the longitudinal direction of the
A front end abutting end capable of abutting on the lower surface of the lid receiving frame; a rotation restricting means for restricting rotation with respect to the holder; and a vertical screw hole to be screwed with the lock bolt. The front end of the abutting end is opposed to the lower surface of the lid receiving frame, and the retracted position is retracted from the advanced position. A locking device for a groove lid, comprising: a locking piece provided so as to be moved up and down through its screwing action by a rotation operation. 2. A lock release restricting projection for holding the lock piece in the advanced position by contacting the operation head of the lock bolt in the advanced position of the lock piece from the rear side on the upper surface of the main plate portion. Or the locking device of the groove cover of Claim 2.

Images