JP2013129970A - Groove cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a groove cover with low volume and light weight which can be reliably prevented from detaching from or flying off a groove.SOLUTION: A groove cover includes: a metallic platy cover body 10 which has width wider than the opening width of a groove, and whose central portions in the width direction of both ends of a direction which is vertical to the width direction of the groove constitute bent ribs 10a; and a detachment prevention structure engaged with the cover body 10 for preventing the cover body 10 from detaching from a groove 11.

Description

  The present invention relates to a groove lid for covering a groove such as a pit, trough or side groove.

  Concrete lids are generally used as groove lids for covering pits, troughs or U-shaped side grooves for wiring, piping or drainage (Patent Documents 1 and 2).

  For example, Patent Literature 1 discloses a gutter block in which a concrete cover plate in which a decorative layer harmonized with the landscape of the installation area is provided on the open surface of a gutter block having a U-shaped cross section.

  Patent Document 2 discloses a mounting structure in which a side groove cover covering plate is fixed to an upper surface of a concrete lid that closes an opening of a U-shaped side groove.

  Recently, a synthetic resin lid such as FRP has been used instead of concrete.

JP-A-6-200550 JP 2003-027575 A

  However, conventional concrete or synthetic resin lids such as those mentioned above cannot be recycled, so when a groove lid needs to be replaced, the lid that has been used until then must be discarded. However, this has been a big problem from the viewpoint of reducing the amount of waste and effective utilization of resources. Furthermore, the lid made of concrete or synthetic resin is relatively heavy and has a large volume, so that there is a problem that a great deal of labor is required for transportation and installation.

  This problem can be solved by using a lightweight metal lid, especially an aluminum lid, instead of concrete or synthetic resin, but this time the lid will scatter under strong winds. There was a new problem that it became easier.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a groove lid that has a small volume and is lightweight, and that can reliably prevent detachment and scattering from the groove.

  According to the present invention, a metal plate-like lid body having a width wider than the opening width of the groove and having a central portion in the width direction at both ends perpendicular to the width direction of the groove constitutes a bending rib, A groove lid is provided that is engaged with the body and includes a removal prevention structure that prevents the lid body from being detached from the groove.

  By configuring the lid with a metal plate, the volume can be reduced and the weight can be reduced, and even in that case, since the separation prevention structure is provided, the groove lid can be separated from the groove and scattered. It can be surely prevented. Further, since the movement of the groove lid in the groove in the width direction can be restricted by the bending rib, it is possible to prevent separation in that sense.

  In the present invention, it is preferable that the detachment prevention structure is provided with a connector that is fixed to the lid body and that fixes the bent ribs of the lid bodies adjacent to each other in a state where they are in contact with each other.

  The connecting tool has a protruding piece inserted into a gap above the contact portion of the folding rib in the adjacent lid body, and contacts the upper metal fitting that contacts the upper surface of the lid body and the lower end surface of the contacted bending rib. More preferably, a lower metal fitting having a U-shaped cross section and a fixing bolt for fixing the upper metal fitting and the lower metal fitting to each other via a through hole provided in one lid body are provided.

  The connecting tool has a protruding piece inserted into a gap above the abutting portion of the folding rib in the lids adjacent to each other, and an upper metal fitting that abuts on the upper surface of the lid, and a through hole provided in the abutting folding rib A lower metal fitting having a U-shaped cross-section whose both ends are in contact with the lower surface of the lid, and a fixing bolt for fixing the upper metal fitting and the lower metal fitting to each other through a through hole provided in the lid. It is also more preferable.

  The connector is provided with an upper metal fitting, a lower metal fitting having a U-shaped cross section that abuts against a lower end surface of a bent rib abutted with each other adjacent lids, and an upper metal fitting and a lower metal fitting provided on the adjacent lid bodies, respectively. It is also more preferable to provide two fixing bolts that are fixed to each other through the two through holes formed.

  The connecting tool is hooked to the fixing bolt that passes through the through-hole provided in the lid, and one end is hooked to the lower end surface of the bending rib that is in contact with the adjacent lid, and the other end is fixed by the fixing bolt. It is more preferable to provide a metal fitting fixed to the lid.

  The connector is hooked on the lower end surface of the bending rib whose one end is in contact with the adjacent lids, and a portion continuous to the one end is provided in one adjacent lid Insert the hole into the upper surface of the lid that is adjacent to each other, and then insert the through hole provided in the other lid that is adjacent to each other to the other end that is hooked on the lower end surface of the bending rib. It is more preferable to provide a continuous metal fitting.

  It is also preferable that the coupling tool is provided at the center in the width direction of the lid bodies adjacent to each other, or a plurality of connectors are provided side by side in the width direction of the lid bodies adjacent to each other.

  The connector has a locking piece protruding upward at one end, and is inserted through a through hole provided in one of the lids adjacent to each other so that one end is the one lid. Provided on the lower metal fitting that contacts the upper surface of the body, the upper metal fitting that has one end locked to the locking piece of the lower metal fitting and that contacts the upper surface of the cover, and the other of the adjacent lids It is also preferable to include a fixing bolt that fixes the other end of the lower metal fitting and the other end of the upper metal fitting to each other through the formed through hole.

  The connector is provided with a rectangular upper metal fitting abutting on the upper surface of the lid, a rectangular lower metal fitting abutting on the lower surface of the lid, and an upper metal fitting and a lower metal fitting provided on the adjacent lid bodies, respectively. It is also preferable to include two fixing bolts that are fixed to each other through two through holes.

  It is also preferable that the connector is provided on the outer side in the width direction of the bending ribs of the lids adjacent to each other.

  In the present invention, the above-described detachment preventing structure is fixed to the lid, and includes a projecting tool that fixes the lid to the groove by pressing each other between the lid and the inner wall surface of the groove. Is preferred.

  The bending rib of the lid body has an inclined side surface that becomes narrower toward the tip, and the projecting tool has an upper metal fitting whose one end abuts the upper surface of the groove, the side surface of the bending rib, and the groove More preferably, a lower metal fitting having rigidity or elasticity that comes into contact with the inner wall surface and an adjustment bolt capable of connecting and fixing the upper metal fitting and the lower metal fitting and shortening the distance between the two are provided.

  It is more preferable that the brace includes a metal fitting having one end abutting against and pressing the inner wall surface of the groove and a fixing bolt for fixing the other end of the metal fitting to the back surface of the lid. .

  It is preferable that the projecting tool is provided at both ends in the direction perpendicular to the width direction of the lid, or provided in the center in the direction perpendicular to the width direction of the lid.

  The brace includes a pair of pressing members whose one ends are in contact with the inner wall surfaces of the grooves and can be pressed, and an adjustment member capable of adjusting the distance between the other end of the pair of pressing members and the inner wall surface. Preferably it is.

  In the present invention, it is preferable that the detachment preventing structure is fixed to the lid and includes a connection fixture that directly connects and fixes the lid and the groove.

  The bending rib of the lid body has notch grooves on both side surfaces, and the connecting fixture has an L-shaped cross-section metal fitting whose one end engages with the notch groove, and the other end of the L-shaped cross-section metal fitting. It is also more preferable to provide an anchor bolt that fixes to the inner wall surface of the groove.

  More preferably, the connecting fixture includes an anchor bolt that fixes the lid to the upper surface of the groove.

  In this case, the groove has a width wider than the opening width of the groove, and a central portion in the width direction at both ends in a direction perpendicular to the width direction of the groove constitutes a bent rib and a flange portion extending in the horizontal outward direction from the tip of the bent rib. The metal plate-like other lid body is further provided, and the lid body and the other lid body are alternately arranged on the groove so that the bending rib of the lid body abuts on the collar portion of the other lid body. It is more preferable to arrange in the above.

  The connecting fixture includes an L-shaped cross-section bracket, a fixing bolt that fixes one end of the L-shaped cross-section bracket to the lid, and an anchor bolt that fixes the other end of the L-shaped cross-section bracket to the inner wall surface of the groove; It is also more preferable to have.

  More preferably, the connecting fixture includes a plurality of fixing bolts for fixing the bending ribs of the lids adjacent to each other.

  According to the present invention, it is possible to reduce the volume and weight by configuring the lid body with a metal plate, and also in that case, since the separation prevention structure is provided, the groove lid is detached from the groove, It is possible to reliably prevent scattering. Further, since the movement of the groove lid in the groove in the width direction can be restricted by the bending rib, it is possible to prevent separation in that sense.

1 is a perspective view schematically showing a partial configuration of a groove lid as a first embodiment of the present invention. FIG. It is the (A) top view which shows the structure of the cover body in 1st Embodiment, (B) Elevated view, (C) Side view. It is the (A) top view which shows the whole structure of the groove cover in 1st Embodiment, (B) It is the BB sectional drawing of (A). (A) Sectional view showing the mounting configuration of the connector in the first embodiment, (B) Axial sectional view of the upper bracket, (C) Plan view of the upper bracket, (D) Plan view of the lower bracket, (E) It is an axial sectional view of a lower metal fitting. It is the (A) top view which shows the whole structure of the groove cover in the one change aspect of 1st Embodiment, (B) It is the BB sectional drawing of (A). As a second embodiment of the present invention, (A) a sectional view showing a groove lid connector, (B) an axial sectional view of an upper bracket, (C) a plan view of the upper bracket, and (D) a lower bracket. It is a top view, (E) It is an axial sectional view of a lower metal fitting. As a third embodiment of the present invention, (A) a sectional view showing a mounting configuration of a groove lid connector, (B) an axial sectional view of an upper bracket, (C) a plan view of the upper bracket, and (D) a lower bracket. It is a top view, (E) It is an axial sectional view of a lower metal fitting. As a fourth embodiment of the present invention, (A) a sectional view showing a groove lid connector, (B) an axial sectional view of an upper bracket, (C) a plan view of the upper bracket, and (D) a lower bracket. It is a top view, (E) It is an axial sectional view of a lower metal fitting. It is the (A) top view which shows the whole structure of a groove cover as a 5th Embodiment of this invention, (B) BB sectional drawing of (A), (C) Side view. It is sectional drawing explaining the attachment state of the coupling tool in 5th Embodiment. It is a perspective view which shows the partial structure of a groove cover from the back side as the 6th Embodiment of this invention. It is the (A) top view which shows the whole structure of a groove cover as the 7th Embodiment of this invention, (B) BB sectional drawing of (A), (C) Side view. It is sectional drawing which shows the structure of the coupling tool in 7th Embodiment. It is the (A) top view which shows the whole structure of a groove cover as the 8th Embodiment of this invention, (B) It is the BB sectional drawing of (A). It is the sectional view on the AA line of (A) and (B) which shows the whole structure of the coupling tool in 8th Embodiment, (B) A top view. It is (A) top view which shows the whole structure of a groove cover as 9th Embodiment of this invention, (B) The BB sectional drawing of (A), (C) It is a side view. (A) The sectional view on the AA line of (C) which shows the whole composition of the lid locking tool in a 9th embodiment, (B) The sectional view on the BB line of (C), (C) is there. It is the (A) top view which shows the whole structure of a groove cover as a 10th Embodiment of this invention, (B) The BB sectional drawing of (A), (C) It is a side view. It is the sectional view on the AA line of (A) and (B) which shows the whole structure of the tension tool in 10th Embodiment, (B) Plan view, (C) It is a side view. It is (A) top view which shows the whole structure of a groove cover as an 11th Embodiment of this invention, (B) BB sectional drawing of (A), (C) Side view. It is sectional drawing which shows the whole structure of the stretching tool in 11th Embodiment. It is the (A) top view and (B) elevation which show the whole structure of a groove cover as a 12th embodiment of this invention. It is (A) elevation, (B) top view, and (C) side view which show the whole structure of the brace in 12th Embodiment. It is the (A) top view and (B) elevation which show the whole structure of a groove cover as a 13th Embodiment of this invention. It is the (A) elevation view, (B) top view, and (C) side view which show the whole structure of the brace in 13th Embodiment. It is an elevation view which shows the whole structure of a groove cover as 14th Embodiment of this invention. It is an elevation view which shows the whole structure of the tension tool in 14th Embodiment. It is a top view which shows roughly the partial structure of the distance adjustment member in the one change aspect of 14th Embodiment. It is a top view which shows roughly the partial structure of the distance adjustment member in the other change aspect of 14th Embodiment. It is the (A) top view which shows the whole structure of a groove cover as 15th Embodiment of this invention, (B) It is the BB sectional drawing of (A). It is the (A) top view which shows the whole structure of a groove cover as 16th Embodiment of this invention, (B) It is BB sectional drawing of (A). It is the (A) top view which shows the whole structure of a groove cover as a 17th Embodiment of this invention, (B) It is BB sectional drawing of (A). It is sectional drawing which shows the whole structure of a groove cover as 18th Embodiment of this invention. It is an elevation view which shows the whole structure of a groove cover as 19th Embodiment of this invention. It is sectional drawing which shows the whole groove cover structure as 20th Embodiment of this invention.

  FIG. 1 schematically shows a configuration in which two groove lids are arranged adjacent to each other on a groove in the first embodiment of the present invention, and FIG. 2 shows a single body configuration of the lid body in this embodiment, FIG. 3 shows a configuration in which a plurality of groove lids are arranged in the present embodiment, and FIG. 4 shows a configuration of each connector in the present embodiment. In addition, in FIG. 3, the display of the striped pattern provided in the upper surface of the cover body 10 is abbreviate | omitted.

  In these drawings, reference numeral 10 denotes a metal plate-like lid body placed on a groove 11 such as a wiring, piping or drainage pit, trough or U-shaped side groove, and 12 is a lid body 10 adjacent to each other. Each of the connecting tools for connecting and fixing is shown.

  As can be seen from FIGS. 1 and 2, the lid 10 is formed by cutting, bending and punching an aluminum plate having a non-slip stripe pattern on the upper surface. That is, the aluminum strip is cut into a rectangular shape in which the central portions of both sides facing each other protrude in a convex shape, and the protruding convex portions are bent at substantially right angles to form the bent ribs 10a and 10b. In that case, a notch 10c is inserted at the base of the convex portion and bent from the notch 10c, so that the bent surfaces of the bent ribs 10a and 10b and the lid end faces 10d on both sides in the width direction of the bent ribs 10a and 10b are the same. It forms so that it may become a plane. Further, through holes 10e for fixing bolts are drilled at necessary positions.

  The width of the lid 10 is set corresponding to the entire width of the groove 11. The width of the bending ribs 10a and 10b is set to a value slightly smaller than the opening width of the groove 11 (for example, 150 mm to 2300 mm). Thereby, the movement of the groove lid in the groove 11 in the width direction is restricted by the contact between the side ends of the bent ribs 10 a and 10 b and the inner wall surface of the groove 11. The length (height) of the bending ribs 10a and 10b is arbitrary, but is set to 50 mm, for example. The thickness of the lid 10 is set to 3 to 6 mm, for example.

  A plurality of the lids 10 are installed along the grooves 11 in a state where the bent surfaces of the folding ribs 10a and 10b of the lids adjacent to each other and the lid body end face 10d are in contact with each other. A connector 12 is provided at the position of the bending ribs of the two lid bodies 10 adjacent to each other that are in contact with each other. In this embodiment, two coupling tools 12 are provided side by side in the width direction for every two lids 10 adjacent to each other.

  As shown in detail in FIG. 4, each connector 12 is provided on the upper surface of the lid body 10, more specifically, an upper portion provided in contact with the upper surfaces of the bending ribs 10 a and 10 b of the lid bodies 10 adjacent to each other. The metal fitting 12a and the lower metal fitting 12b provided on the lower surface of the lid body 10, more specifically, the lower metal fitting 12b provided in contact with the lower end surfaces of the bending ribs 10a and 10b of the adjacent lid body 10 and in contact with the lower surface of the lid body 10. And a fixing bolt 12c for fixing the upper metal part 12a and the lower metal part 12b to each other through a through hole 10e provided in one lid body 10. The upper metal fitting 12a, the lower metal fitting 12b, and the fixing bolt 12c are made of, for example, iron or stainless steel having rigidity.

Although the upper metal fitting 12a is not limited to this dimension, for example, by pressing a rectangular metal plate having a size of about 30 mm × 60 mm × 2 mm, a protruding piece 12a ₁ formed in the center portion, formed deviated position from a center portion, and a through hole 12a ₂ of the fixing bolt 12c. Projecting pieces 12a _1, when fitted with the connector 12, and is configured to be inserted into the abutting portion above spaces bent ribs 10a and 10b of the lid 10 adjacent to each other. With this configuration, when performing fixed by fixing bolts 12c by assembling connector 12, and the gap and the projecting piece 12a ₁ can be prevented from unwanted rotation of the connector 12 so engaged.

The lower metal fitting 12b is not limited to this size, but is formed to have a U-shaped cross section by press bending a strip-shaped metal plate having a size of about 15 mm × 135 mm × 3 mm, for example. A rib support portion 12b ₁ ; a flange portion 12b ₂ formed vertically extending from one end of the rib support portion 12b ₁ ; and a screw hole 12b ₃ for the fixing bolt 12c formed in the flange portion 12b _2. It has.

  A method for connecting and fixing the lids 10 adjacent to each other using the connector 12 will be described below.

Before the installation work, the upper metal fitting 12a and the lower metal fitting 12b are assembled to one lid 10 with the fixing bolt 12c. In other words, the rib supporting part 12b ₁ of the lower bracket 12b is, so as to sandwich only one of the folded ribs 10b, screw holes 12b of the lower bracket 12b via the through hole 10e of the fixing bolt 12c through holes 12a ₂ and the cover 10 ₃ is screwed together. However, the fixing bolt 12c is not tightened but is kept loose. Alternatively, it is acceptable to crush threads of the distal end portion of the fixing bolt 12c, keep the not escape from the screw hole 12b ₃ of the lower bracket 12b. During the installation work, the upper metal part 12a is rotated in a direction that does not interfere with the insertion of the other lid 10. Inserting the folded ribs 10a of the other of the lid body 10 is inserted into the rib supporting part 12b ₁ of the lower bracket 12b, the projecting piece 12a ₁ is bent ribs 10a and 10b abutting portion above in the gap of the upper bracket 12a in this state The fixing bolt 12c is tightened and fixed. Accordingly, the rib supporting part 12b ₁ of the lower bracket 12b is held on the lower end surface of the rib folding the bottom surface of the rib supporting part 12b ₁ with sandwich the abutting bent ribs 10a and 10b as contact with supporting the . In this way, by fastening and screwing with the fixing bolts 12c, the lids 10 adjacent to each other are connected and fixed by the connecting tool 12. By performing the same fixing process on the connector 12 disposed at the other end in the width direction, the adjacent lid bodies 10 are reliably connected and fixed to each other. At the time of removal work, the fixing bolt 12c is loosened, and the other lid body 10 is removed upward by a procedure reverse to the above-described connection fixing method.

Thus, according to this embodiment, the ribs 10a and 10b bent by the rib supporting part 12b ₁ is supported by being sandwiched, the upper bracket across the lower bracket 12b is lid 10 having the rib supporting part 12b ₁ Since it is fixed with the fixing bolt 12c together with 12a, the lids 10 are reliably connected and fixed, and can be prevented from being detached from the groove 11 and scattered. Moreover, the installation work is easy with little looseness. Further, since the protruding piece 12a ₁ is provided, it can be fixed by one fixing bolt 12c, so that the configuration becomes simple. Furthermore, since it is only necessary to provide one through hole 10e for one connector 12 for the lid 10, workability is good. Moreover, if the fixing bolt 12 c of the connector 12 is loosened, only the lid 10 can be removed from the groove 11. Of course, since an aluminum plate is used as the lid 10, the volume is small and light.

  FIG. 5 shows the overall structure of the groove lid according to a modified embodiment of the present embodiment. In the embodiment of FIGS. 1 to 4, two coupling tools 12 arranged in the width direction of the two lids 10 adjacent to each other are provided. However, in this modification, the two lids 10 adjacent to each other. A single connector 12 is provided at the center in the width direction. Other configurations and operational effects in this modified mode are the same as those in the embodiment of FIGS. In addition, in FIG. 5, the display of the striped pattern provided in the upper surface of the cover body 10 is abbreviate | omitted.

  FIG. 6 shows the structure of each connector in the second embodiment of the present invention. Also in this embodiment, a plurality of lids 10 are installed along the grooves 11 in a state where the surfaces of the bending ribs 10a and 10b of the lids adjacent to each other and the lid body end face 10d (see FIG. 2) are in contact with each other. The A connector 22 is provided at the position of the bending ribs of the two adjacent lids 10 that are in contact with each other.

  In the present embodiment, the configuration excluding the connector is the same as that of the first embodiment shown in FIGS. Further, in the present embodiment, as in the case of FIG. 3, two connecting tools 22 are provided in the width direction for each of the two lid bodies 10 adjacent to each other. As in the case of, a single connector 22 is provided at the center in the width direction of two lids 10 adjacent to each other.

  As shown in detail in FIG. 6, each connector 22 is provided on the upper surface of the lid body 10, more specifically, an upper portion provided in contact with the upper surfaces of the bending ribs 10 a and 10 b of the lid bodies 10 adjacent to each other. The metal fitting 22a and the lower metal fitting 22b provided on the lower surface of the lid body 10 and more specifically, the lower metal fitting 22b provided in contact with the lower end surfaces of the bending ribs 10a and 10b of the adjacent lid body 10 and in contact with the lower surface of the lid body 10. And a relatively long fixing bolt 22c for fixing the upper metal fitting 22a and the lower metal fitting 22b to each other through a through hole 10e provided in one lid body 10. The upper metal fitting 22a, the lower metal fitting 22b, and the fixing bolt 22c are made of, for example, iron or stainless steel having rigidity.

Although the upper metal fitting 22a is not limited to this dimension, for example, by pressing a rectangular metal plate having a size of about 30 mm × 60 mm × 2 mm, a protruding piece 22a ₁ formed in the center portion, formed deviated position from a center portion, and a through hole 22a ₂ of the fixing bolt 22c. Projecting pieces 22a _1, when fitted with the connector 22, and is configured to be inserted into the abutting portion above spaces bent ribs 10a and 10b of the lid 10 adjacent to each other. With this configuration, when performing fixed by fixing bolts 22c by assembling connector 22, and the gap and the projecting piece 22a ₁ can be prevented from unwanted rotation of the connecting member 22 so engaged.

The lower metal fitting 22b is not limited to this size, but is formed to have a U-shaped cross section by press bending a strip-shaped metal plate having a size of about 10 mm × 135 mm × 3 mm, for example. A rib support portion 22b ₁ and a screw hole 22b ₃ for a fixing bolt 22c formed on the bottom surface of the rib support portion 22b ₁ are provided.

  A method for connecting and fixing the adjacent lids 10 using the connector 22 will be described below.

Prior to the installation work, the upper metal fitting 22a and the lower metal fitting 22b are assembled to one lid 10 with the fixing bolt 22c. In other words, the rib supporting part 22b ₁ of the lower bracket 22b is, so as to sandwich only one of the folded ribs 10b, screw holes 22b of the lower bracket 22b via the through hole 10e of the fixing bolt 22c through holes 22a ₂ and the cover 10 ₃ is screwed together. However, the fixing bolt 22c is not tightened but is kept loose. Alternatively, it is acceptable to crush threads of the distal end portion of the fixing bolt 22c, keep the not escape from the screw hole 22b ₃ of the lower bracket 22b. During the installation work, the upper metal fitting 22a is rotated in a direction that does not interfere with the insertion of the other lid 10. Inserting the folded ribs 10a of the other of the lid body 10 is inserted into the rib supporting part 22b ₁ of the lower bracket 22b, the projecting piece 22a ₁ is bent ribs 10a and 10b abutting portion above in the gap of the upper bracket 22a in this state The fixing bolt 22c is tightened and fixed. Accordingly, the rib supporting part 22b ₁ of the lower bracket 22b is held on the lower end surface of the rib folding the bottom surface of the rib supporting part 22b ₁ with sandwich the abutting bent ribs 10a and 10b as contact with supporting the . In this way, by fastening and screwing with the fixing bolts 22c, the lids 10 adjacent to each other are connected and fixed by the connecting tool 22. By performing the same fixing process on the connector 22 arranged at the other end in the width direction, the adjacent lid bodies 10 are reliably connected and fixed to each other. At the time of the removal work, the fixing bolt 22c is loosened, and the other lid body 10 is removed upward by a procedure reverse to the above-described connection fixing method.

Thus, according to this embodiment, the ribs 10a and 10b bent by the rib supporting part 22b ₁ is supported by being sandwiched, the upper bracket across the lower bracket 22b is lid 10 having the rib supporting part 22b ₁ Since it is fixed with the fixing bolt 22c together with 22a, the lid bodies 10 are reliably connected and fixed, and can be prevented from being detached from the groove 11 and scattered. Moreover, the installation work is easy with little looseness. Further, since the projecting piece 22a ₁ are provided, since it is possible fixed by a single fixing bolts 22c, configuration can be simplified. Furthermore, since it is only necessary to provide one through hole 10e for one connector 22 for the lid 10, workability is good. Moreover, if the fixing bolt 22c of the connector 22 is loosened, only the lid 10 can be removed from the groove 11. Of course, since an aluminum plate is used as the lid 10, the volume is small and light.

  FIG. 7 shows the configuration of each connector in the third embodiment of the present invention. Also in this embodiment, a plurality of lids 10 are installed along the grooves 11 in a state where the surfaces of the bending ribs 10a and 10b of the lids adjacent to each other and the lid body end face 10d (see FIG. 2) are in contact with each other. The The coupling tool 32 is provided at the position of the bending ribs that are in contact with each other between the two lid bodies 10 adjacent to each other.

  In the present embodiment, the configuration excluding the connector is the same as that of the first embodiment shown in FIGS. Further, in the present embodiment, as in the case of FIG. 3, two coupling tools 32 are provided side by side in the width direction for each of the two lid bodies 10 adjacent to each other. As in the case of, a single connector 32 is provided at the center in the width direction of the two lids 10 adjacent to each other.

  As shown in detail in FIG. 7, each connector 32 is provided on the upper surface of the lid body 10, more specifically, an upper portion provided in contact with the upper surfaces of the bending ribs 10 a and 10 b of the lid bodies 10 adjacent to each other. More specifically, the metal fitting 32 a is provided in contact with the lower surface of the lid body 10. More specifically, the through holes 10 f that pass through the bending ribs 10 a and 10 b of the adjacent lid bodies 10 are inserted, and both ends are formed on the lower surface of the lid body 10. A lower metal fitting 32b provided in contact with each other and a fixing bolt 32c for fixing the upper metal fitting 32a and the lower metal fitting 32b to each other through a through hole 10e provided in one lid body 10 are provided. The upper metal fitting 32a, the lower metal fitting 32b, and the fixing bolt 32c are made of, for example, iron or stainless steel having rigidity.

Although the upper metal fitting 32a is not limited to this dimension, for example, by pressing a rectangular metal plate having a size of about 30 mm × 50 mm × 2 mm, two pieces formed respectively at both ends in the width direction are formed. the projecting piece 32a _1, which is formed at a position deviated from the central portion, and a through hole 32a ₂ of the fixing bolt 32c. Projecting pieces 32a _1, when fitted with the connector 32, and is configured to be inserted into the abutting portion above spaces bent ribs 10a and 10b of the lid 10 adjacent to each other. With this configuration, when performing fixed by fixing bolts 32c by assembling connector 32, and the gap and the projecting piece 32a ₁ can be prevented from unwanted rotation of the connector 32 so engaged.

The lower metal fitting 32b is not limited to this size, but is formed to have a U-shaped cross section by press bending a strip-shaped metal plate having a size of about 10 mm × 50 mm × 3 mm, for example. A screw hole 32b ₃ for the fixing bolt 32c is formed on the bottom surface.

  A method for connecting and fixing the lids 10 adjacent to each other using the connector 32 will be described below.

Before the installation work, the upper metal fitting 32a and the lower metal fitting 32b are assembled to one lid 10 with the fixing bolt 32c. That is, the lower bracket 32b is, so as to pass through only the through hole 10f of one of the folded ribs 10b, screw holes 32b ₃ of the lower bracket 32b via the through hole 10e of the fixing bolt 32c through holes 32a ₂ and the cover 10 Screwed on. However, the fixing bolt 32c is not tightened but is kept loose. Alternatively, it is acceptable to crush threads of the distal end portion of the fixing bolt 32c, keep the not escape from the screw hole 32 b ₃ of the lower bracket 32b. At the time of new installation work, the upper metal fitting 32a is rotated in a direction that does not interfere with the other lid body 10. In this state, the other lid body 10 is slid from the groove direction or obliquely from above, and the lower metal fitting 32b is inserted into the through hole 10f of the bending rib 10a of the other lid body 10. Next, the lids 10 adjacent to each other are coupled and fixed by the coupling tool 32 by tightening and screwing with the fixing bolt 32c. By performing the same fixing process on the connector 32 disposed at the other end in the width direction, the adjacent lid bodies 10 are reliably connected and fixed to each other. For example, when there is no gap for sliding the other lid body 10 in the groove 11, such as when a groove lid is already installed, several lid bodies 10 (the number of lid bodies having a weight that does not scatter) outside the groove 11. Are connected to each other by the connecting tool 32, and the connected parts are installed in the groove 11. At the time of the removal operation, the fixing bolt 32c is loosened, and a plurality of lid bodies 10 (the number of lid bodies that do not scatter) are removed from the groove 11 or a gap is formed in the extending direction of the groove 11 Then, the other lid body 10 is slid, and the other lid body 10 is removed by a procedure reverse to the above-described connection fixing method.

Thus, according to this embodiment, the through holes 10f of the bending ribs 10a and 10b are sandwiched and supported by the lower metal fitting 32b, and are further fixed by the fixing bolts 32c together with the upper metal fitting 32a with the lid body 10 interposed therebetween. Therefore, the lids 10 are reliably connected and fixed, and can be reliably prevented from detaching and scattering from the groove 11. Moreover, the installation work is easy with little looseness. Further, since the protruding piece 32a ₁ is provided, the structure can be simplified because the fixing piece 32a ₁ can be fixed by one fixing bolt 32c. Furthermore, since it is only necessary to provide one through hole 10e for one connector 32 for the lid 10, workability is good. Of course, since an aluminum plate is used as the lid 10, the volume is small and light.

  FIG. 8 shows the configuration of each connector in the fourth embodiment of the present invention. Also in this embodiment, a plurality of lids 10 are installed along the grooves 11 in a state where the surfaces of the bending ribs 10a and 10b of the lids adjacent to each other and the lid body end face 10d (see FIG. 2) are in contact with each other. The A connecting tool 42 is provided at the position of the bending ribs of the two adjacent lids 10 that are in contact with each other.

  In the present embodiment, the configuration excluding the connector is the same as that of the first embodiment shown in FIGS. Further, in the present embodiment, as in the case of FIG. 3, two coupling tools 42 are provided side by side in the width direction for each of the two lid bodies 10 adjacent to each other. As in the case of, a single connector 42 is provided at the center in the width direction of two lids 10 adjacent to each other.

  As shown in detail in FIG. 8, each coupling tool 42 is provided on the upper surface of the lid body 10, more specifically, an upper bracket provided in contact with the upper surfaces of the bending ribs 10 a and 10 b of the lid body 10 adjacent to each other. 42a, provided on the lower surface of the lid 10, more specifically, a lower metal fitting 42b provided in contact with the lower end surfaces of the bending ribs 10a and 10b of the lid 10 adjacent to each other, an upper metal fitting 42a, a lower metal fitting 42b, Are provided with two fixing bolts 42c that fix each other through a through hole 10e provided in each of the lids 10. The upper metal fitting 42a, the lower metal fitting 42b, and the fixing bolt 42c are made of, for example, iron or stainless steel having rigidity.

The upper metal fitting 42a is not limited to this size, but is formed at a position shifted from the center by pressing a rectangular metal plate having a size of about 30 mm × 60 mm × 2 mm, for example. has two through holes 42a ₂ for fixing bolts 42c.

The lower metal fitting 42b is not limited to this size, but is formed to have a U-shaped cross section by press bending a strip-shaped metal plate having a size of about 10 mm × 135 mm × 3 mm, for example. The rib support portion 42b ₁ , the two flange portions 42b ₂ formed by extending vertically from both ends of the rib support portion 42b ₁ , and the screw holes 42b for the fixing bolts 42c formed in the flange portions 42b _{2. 3} is provided.

  A method for connecting and fixing the lids 10 adjacent to each other using the connector 42 will be described below.

Prior to the installation work, the upper metal fitting 42a and the lower metal fitting 42b are assembled to one lid 10 with one fixing bolt 42c. In other words, the rib supporting part 42b ₁ of the lower bracket 42b is, so as to sandwich only one of the folded ribs 10b, one of the lower bracket 42b and one fixing bolt 42c via a through hole 10e of the through hole 42a ₂ and the cover 10 previously screwed into the screw hole 42b _3. However, this one fixing bolt 42c is not tightened but is left loose. Alternatively, it is acceptable to crush threads of the distal end portion of the one of the fixing bolts 42c, keep the not escape from the screw hole 42b ₃ of the lower bracket 42b. However, the normal screw thread is maintained without crushing the screw thread at the tip of the other fixing bolt 42c. During the installation work, the upper metal fitting 42a is rotated in a direction that does not interfere with the insertion of the other lid 10. Inserting the folded ribs 10a of the other of the lid body 10 is inserted into the rib supporting part 42b ₁ of the lower bracket 42b, the projecting piece 42a ₁ is bent ribs 10a and 10b abutting portion above in the gap of the upper bracket 42a in this state rotate as, the other fixing bolts 42c through the through hole 10e of the through hole 42a ₂ and the cover 10 is screwed to the other threaded hole 42b ₃ of the lower bracket 42b, tightening both the fixing bolt 42c And fix. Accordingly, the rib supporting part 42b ₁ of the lower bracket 42b is held on the lower end surface of the rib folding the bottom surface of the rib supporting part 42b ₁ with sandwich the abutting bent ribs 10a and 10b as contact with supporting the . In this way, by fastening and screwing with both the fixing bolts 42c, the lids 10 adjacent to each other are connected and fixed by the connecting tool 42. By performing the same fixing process on the connecting tool 42 arranged at the other end in the width direction, the adjacent lid bodies 10 are reliably connected and fixed to each other. At the time of removal, the other fixing bolt 42c is removed and one fixing bolt 42c is loosened, and the other lid body 10 is removed upward.

Thus, according to this embodiment, the ribs 10a and 10b bent by the rib supporting part 42b ₁ is supported by being sandwiched, the upper bracket across the lower bracket 22b is lid 10 having the rib supporting part 42b ₁ Since the two fixing bolts 42c are fixed together with 42a, the lid bodies 10 are reliably connected and fixed, and the separation from the groove 11 and the scattering can be reliably prevented. Moreover, the installation work is easy with little looseness. Further, if the other fixing bolt 42c of the connector 42 is removed and one fixing bolt 42c is loosened, only the lid 10 can be removed from the groove 11. Of course, since an aluminum plate is used as the lid 10, the volume is small and light.

  FIG. 9 shows a configuration in which a plurality of groove lids according to the fifth embodiment of the present invention are arranged, and FIG. 10 shows a configuration of each connector in the present embodiment. In addition, in FIG. 9, the display of the striped pattern provided on the upper surface of the lid 10 is omitted.

  Also in this embodiment, a plurality of lids 10 are installed along the grooves 11 in a state where the surfaces of the bending ribs 10a and 10b of the lids adjacent to each other and the lid body end face 10d (see FIG. 2) are in contact with each other. The A connecting tool 52 is provided at the position of the bending ribs that are in contact with each other between the two lids 10 adjacent to each other.

  In the present embodiment, the configuration excluding the connector is the same as that of the first embodiment shown in FIGS. Further, in the present embodiment, as in the case of FIG. 3, two coupling tools 52 are provided side by side in the width direction for every two lid bodies 10 adjacent to each other. As in the case of, a single connector 52 is provided at the center in the width direction of the two lids 10 adjacent to each other.

  As shown in detail in FIG. 10, each connector 52 is provided with a metal fitting 52 b that contacts the lower end surfaces of the bending ribs 10 a and 10 b of the adjacent lid bodies 10, and the metal fitting 52 b is provided on one lid body 10. A fixing bolt 52c that is fixed through the through hole 10e and a locking nut 52d that can be screwed into the fixing bolt 52c are provided. The metal fitting 52b, the fixing bolt 52c, and the nut 52d are formed of, for example, iron or stainless steel having rigidity.

The metal fitting 52b is formed by press-bending a strip-shaped metal plate. One end of the metal fitting 52b is hooked on the lower end surfaces of the bent ribs 10a and 10b of the lid 10 adjacent to each other. The hook portion 52b ₁ is formed, and the bent portion 52b ₂ is formed at the other end portion. A screw hole 52 b ₃ for fixing bolt 52c is formed in the bent portion 52 b _2. Nut 52d for locking is provided on the screw hole 52 b ₃ coaxially. However, the nut 52d can be omitted.

  A method of connecting and fixing the lids 10 adjacent to each other using the connector 52 will be described below with reference to FIG.

Installation work before, as shown in FIG. 10 (B), is inserted one of the fixing bolt 52c to the through hole 10e of the lid member 10, screw holes 52b provided in the front end portion in the bent portion 52b ₂ of the bracket 52b ₃ and is locked by a locking nut 52d. In this state, the metal fitting 52b is suspended by the fixing bolt 52c and can move freely. During installation work, fitting 52b of one of the lid 10, the slope by abutting the folding rib 10b of the other lid 10, hooked to the lower end surface of the hook portion 52b ₁ is bent ribs 10a and 10b, the It becomes the form which embraces the bending ribs 10a and 10b. As a result, the lids 10 adjacent to each other are connected and fixed by the connector 52. About the connection tool 52 arrange | positioned at the other end part of the width direction, the same fixing operation | movement is performed and the adjacent cover bodies 10 are mutually connected. At the time of removal, a rod is inserted from a through-hole (not shown) provided in advance between the through-hole 10e of the lid 10 and the bending ribs 10a and 10b, is brought into contact with the metal fitting 52b, and is inclined to bend the bending rib. It removes from 10a and 10b, and removes the cover body 10 upwards. Alternatively, in a state where the coupling tool 52 is coupled, the lid bodies 10 adjacent to each other are lifted and shifted in the width direction of the groove to remove the coupling tool 52 from the bending ribs 10a and 10b and remove the lid body 10.

Thus, according to this embodiment, bent ribs 10a and 10b of the lid 10 adjacent the bent portion 52b ₂ of the bracket 52b is supported by being sandwiched, fixed to the lid 10 by the fitting 52b is fixed bolt 52c Therefore, the lids 10 are reliably connected and fixed, and can be prevented from being detached from the grooves 11 and scattered. In addition, the attachment work to the lid 10 is easy. Moreover, since it is a simple structure only with the metal fitting 52b and the fixing bolt 52c, it can be comprised cheaply and easily. Furthermore, since it is only necessary to provide one through hole 10e for one connector 52 for the lid 10, workability is good. Moreover, if the rod body is inserted through the through-hole provided in advance, the connecting member 52 is pushed and tilted to remove it from the bent ribs 10a and 10b, only the lid body 10 can be removed from the groove 11. Of course, since an aluminum plate is used as the lid 10, the volume is small and light.

  FIG. 11 shows the configuration of the lid body 10 and the connector 62 in the sixth embodiment of the present invention from the bottom surface direction of the lid body 10. Also in this embodiment, a plurality of lids 10 are installed along the grooves 11 in a state where the surfaces of the bending ribs 10a and 10b of the lids adjacent to each other and the lid body end face 10d (see FIG. 2) are in contact with each other. The A connecting tool 62 is provided at the position of the bending ribs of the two adjacent lids 10 that are in contact with each other.

  In the present embodiment, the configuration excluding the connector is the same as that of the first embodiment shown in FIGS. Moreover, in this embodiment, the some connection tool 62 is provided in the side part and lower end part of the bending rib 10a and 10b which contact | abutted.

  As shown in detail in FIG. 11, each connecting tool 62 is formed in a clip shape by press bending a single strip-shaped metal plate having elasticity. By sandwiching the side portions or lower end portions of the bent ribs 10a and 10b that are in contact with each other between the distal ends 62a of the clip-shaped coupler 62, the bent ribs 10a and 10b are fixed by the elastic force. By performing the same fixing process on the plurality of couplers 62, the adjacent lid bodies 10 are reliably coupled and fixed to each other.

  A method for connecting and fixing the lids 10 adjacent to each other using the connecting tool 62 will be described below.

  At the time of installation work, the side or lower end of the bent ribs 10a and 10b of several lids 10 (the number of lids that do not scatter) is sandwiched between the connecting members 62 outside the groove 11. They are connected to each other, and those connected are installed in the groove 11. At the time of the removal work, a member to which several lids 10 (the number of lids that do not scatter) is connected is removed from the groove 11, and each connection tool 62 is removed to release the connection of the lids 10. .

  As described above, according to the present embodiment, the lid bodies 10 adjacent to each other are connected and fixed only by sandwiching the bending ribs 10a and 10b with the clip-shaped coupling tool 62, and the lid body 10 is detached from the groove 11 and scattered. Can be surely prevented. In addition, since the fixing bolt is not required, the configuration is simplified. Furthermore, since it is not necessary to provide a through hole in the lid body 10, workability is good. Of course, since an aluminum plate is used as the lid 10, the volume is small and light.

  FIG. 12 shows a configuration in which a plurality of groove lids according to the seventh embodiment of the present invention are arranged, and FIG. 13 shows a configuration of each connector in the present embodiment. In addition, in FIG. 12, the display of the striped pattern provided on the upper surface of the lid 10 is omitted.

  Also in this embodiment, a plurality of lids 10 are installed along the grooves 11 in a state where the surfaces of the bending ribs 10a and 10b of the lids adjacent to each other and the lid body end face 10d (see FIG. 2) are in contact with each other. The A connector 72 is provided at the position of the bending ribs of the two lids 10 adjacent to each other in contact with each other.

  In the present embodiment, the configuration excluding the connector is the same as that of the first embodiment shown in FIGS. Further, in the present embodiment, as in the case of FIG. 3, two coupling tools 72 are provided side by side in the width direction for each of the two lid bodies 10 adjacent to each other. As in the case of, a single connector 72 is provided at the center in the width direction of the two lids 10 adjacent to each other.

  As shown in detail in FIG. 13, each connector 72 is formed in a clip shape by press bending a single strip-shaped metal plate having elasticity. The first end 72 a is hooked on the lower end surfaces of the bending ribs 10 a and 10 b of the lid 10 adjacent to each other, and the first portion 72 b continuous with the first end 72 a is a through hole of one lid 10. 10e is inserted, the second part 72c continuous to the first part 72b abuts on the upper surface of the lid 10 adjacent to each other, and the third part 72d continuous to the second part 72c is the other part The second end portion 72e that is inserted through the through hole 10e of the lid body 10 and is continuous with the third portion 72d is hooked on the lower end surfaces of the bending ribs 10a and 10b of the lid body 10 adjacent to each other. It is comprised from the clip-shaped metal fitting which has.

  A method of connecting and fixing the lids 10 adjacent to each other using the connecting tool 72 will be described below.

  At the time of installation work, the first end 72a is inserted through the through hole 10e from above the one lid body 10, while the second end through the through hole 10e from above the other lid body 10 is inserted. The end portion 72e is inserted, the first end portion 72a and the second end portion 72e are hooked on the lower end surfaces of the bent ribs 10a and 10b, and the second portion 72c is brought into contact with the upper surface of the lid body 10. . By performing this fixing process, the adjacent lids 10 are reliably connected and fixed to each other. At the time of removal work, the rod body is inserted through the through hole 10e of the lid body 10, and the first end 72a and the second end 72b of the coupling tool 72 are pushed in so as to be removed from the lower end surfaces of the bent ribs 10a and 10b. Alternatively, one in which several lids 10 are connected is removed from the groove 11, the connecting tool 72 is removed, and the connection of the lid 10 is released.

  Thus, according to the present embodiment, the adjacent lid bodies 10 are connected by simply inserting the clip-like coupling tool 72 through the through hole 10e of the lid body 10 and hooking it on the lower end surfaces of the bending ribs 10a and 10b. It is fixed and it can prevent reliably that the cover body 10 detaches | leaves from the groove | channel 11, and scatters. Moreover, the installation work is easy with little looseness. Further, since the fixing bolt is not necessary, the configuration is simplified. In addition, if the connector 72 is removed, only the lid 10 can be removed from the groove 11. Of course, since an aluminum plate is used as the lid 10, the volume is small and light.

  FIG. 14 shows a configuration in which a plurality of groove lids according to the eighth embodiment of the present invention are arranged, and FIG. 15 shows a configuration of each connector in the present embodiment. In addition, in FIG. 14, the display of the striped pattern provided on the upper surface of the lid 10 is omitted.

  Also in this embodiment, a plurality of lids 10 are installed along the grooves 11 in a state where the surfaces of the bending ribs 10a and 10b of the lids adjacent to each other and the lid body end face 10d (see FIG. 2) are in contact with each other. The A connecting tool 82 is provided at the position of the bending ribs in contact with each other between the two lids 10 adjacent to each other.

  In the present embodiment, the configuration excluding the connector is the same as that of the first embodiment shown in FIGS. In the present embodiment, two coupling tools 82 are provided side by side in the width direction for every two lid bodies 10 adjacent to each other, and as shown in FIGS. The bent ribs 10 a and 10 b are provided in the gaps on the outer side in the width direction and on the inner side of the groove 11 in the width direction.

  As shown in detail in FIG. 15, each connecting tool 82 includes an upper metal fitting 82 a provided on the upper surface of the lid body 10 adjacent to each other, a lower metal fitting 82 b that contacts the lower surface of the lid body 10, an upper metal fitting 82 a and a lower metal fitting. A fixing bolt 82c for fixing the metal fitting 82b to each other through a through hole 10e provided in the other lid body 10 is provided. The upper metal fitting 82a, the lower metal fitting 82b, and the fixing bolt 82c are made of, for example, iron or stainless steel having rigidity.

The top bracket 82a includes a metal plate of the strip-shaped is formed by pressing, and the end portion 82a ₂ raised one via a step portion 82a _1, formed on the other end portion 82a _3, fixed and a through hole 82a ₄ for bolts 82c.

Lower bracket 82b is a metal plate of a strip shape are formed by pressing, to one end portion 82b ₁ which abuts the upper surface of one of the lid 10, formed at the end 82b ₁ of the one upper The locking piece 82b ₂ protruding to the one end 82b ₁ is continuous to the bent portion 82b ₃ inserted through the through-hole 10e provided in the one lid 10 and the bent portion 82b _3. The other end 82b ₄ that contacts the lower surface of the lid 10 and the screw hole 82b ₅ for the fixing bolt 82c provided in the other end 82b ₄ are provided.

  A method of connecting and fixing the lids 10 adjacent to each other using the connecting tool 82 will be described below.

At the time of installation work, the lower metal fitting 82b is inserted through the through hole 10e formed in the lid body 10 in the gap outside the bent rib 10a or 10b in the width direction and inside the groove 11 in the width direction. The end portion 82b ₁ is placed so as to contact the upper surface of the lid body 10. One end portion 82a ₂ of the upper bracket 82a is engaged with the engaging piece 82b ₂ of the lower bracket 82b in this state, the fixing bolt 82c via a through hole 10e of the through hole 82a ₄ and the lid 10 of the upper bracket 82a the by screwed into the screw hole 82b ₅ of the lower bracket 82b, fixed to the lid 10 adjacent the connector 82 to each other. By performing the same fixing process on the connecting tool 82 arranged at the other end in the width direction, the adjacent lids 10 are reliably connected and fixed to each other. At the time of removal work, the fixing bolt 82c is loosened, the connecting tool 82 is removed in the reverse order of the above-described connecting and fixing method, and the lid 10 is removed.

As described above, according to the present embodiment, the lid 10 adjacent to each other is directly sandwiched and supported by the lower bracket 82b and the upper bracket 82a, and the lower bracket 82b and the upper bracket 82a support the lid 10. since it is fixed by the locking piece 82b ₂ and the fixing bolt 82c sandwiching lid 10 to each other is reliably and rigidly connected and fixed, withdrawal from the groove 11, can be reliably prevented from scattering. Moreover, the installation work is easy with little looseness. Further, since the lower metal fitting 82b can be inserted through the through hole 10e and fixed by the fixing bolt 82c after the lid body 10 is arranged, the configuration is simplified. Furthermore, since it is only necessary to provide one through hole 10e for one connector 82 for the lid 10, workability is good. Moreover, if the fixing bolt 82c of the connector 82 is loosened, only the lid 10 can be removed from the groove 11. Of course, since an aluminum plate is used as the lid 10, the volume is small and light.

  FIG. 16 shows a configuration in which a plurality of groove lids according to the ninth embodiment of the present invention are arranged, and FIG. 17 shows a configuration of each connector in the present embodiment. In FIG. 16, the display of the stripe pattern provided on the upper surface of the lid 10 'is omitted.

  In this embodiment, the lid body 10 'is in contact with the surfaces of the bending ribs 10a' and 10b 'of the lid bodies adjacent to each other, but the lid body end face 10d' is not in contact with each other. A plurality are installed along the groove 11 with a gap between them. A connecting tool 92 is provided at the position of the bending ribs that are in contact with each other between the two lids 10 'adjacent to each other.

  In the present embodiment, the configuration excluding the gap between the connector and the lid end face is the same as that of the first embodiment shown in FIGS. In the present embodiment, two coupling tools 92 are provided side by side in the width direction for every two lids 10 'adjacent to each other, as shown in FIG. 16 and FIGS. These connecting tools 92 are provided in the gaps on the outer side in the width direction of the bending ribs 10 a ′ and 10 b ′ and on the inner side in the width direction from the inner wall of the groove 11.

  As shown in detail in FIG. 17, each connector 92 is provided in contact with the upper surface of the lid 10 'adjacent to each other, and the width of the upper metal fitting 92a covering the gap and the bending ribs 10a' and 10b '. The lower metal fitting 92b provided in contact with the lower surface of the lid 10 'on the outer side in the direction, and the upper metal fitting 92a and the lower metal fitting 92b are mutually connected via two through holes 10e' provided in the two lids 10 '. And two fixing bolts 92c for fixing. The upper metal fitting 92a, the lower metal fitting 92b, and the fixing bolt 92c are made of, for example, iron or stainless steel having rigidity.

The upper metal fitting 92a is not limited to this dimension, but is formed at a position shifted from the central part by, for example, pressing a rectangular metal plate having a size of about 70 mm × 80 mm × 2 mm. has two through holes 92a ₁ of the fixing bolt 92c.

The lower metal fitting 92b is not limited to this size, but, for example, two screws for the fixing bolt 92c formed by press-bending a strip-shaped metal plate having a size of about 20 mm × 80 mm × 3 mm. It is provided with a hole 92b _1.

  A method of connecting and fixing the lids 10 'adjacent to each other using the connecting tool 92 will be described below.

Before the installation work, the upper metal fitting 92a and the lower metal fitting 92b are assembled to one lid body 10 'by one fixing bolt 92c. That is, previously screwed into one of the screw holes 92b ₁ of the lower bracket 92b via the 'through-hole 10e of the' one fixing bolts 92c through holes 92a ₁ and the cover 10 to the lower bracket 92b. However, this one fixing bolt 92c is not tightened and is kept loose. Alternatively, it is acceptable to crush threads of the distal end portion of the one of the fixing bolts 92c, keep the not escape from the screw hole 92b ₁ of the lower bracket 92b. However, the normal screw thread is maintained without crushing the screw thread at the tip of the other fixing bolt 92c. During the installation work, the lower metal fitting 92b is installed so as to be located in the gap between the outer side in the width direction of the bent ribs 10a 'and 10b' and the inner side in the width direction from the inner wall of the groove 11, and the upper metal fitting 92a is placed on the other lid 10 '. Rotate in a direction that will not interfere with the insertion. The other fixing bolt 92c in this state screwed into the other threaded hole 92b ₁ of the lower bracket 92b via the 'through-hole 10e of the' through-hole 92a ₁ and the lid 10 of the upper bracket 92a, both of the fixing bolt 92c Tighten and fix. In this way, by tightening and screwing with both fixing bolts 92c, the lids 10 'adjacent to each other are connected and fixed by the connecting tool 92. By performing the same fixing process on the connector 92 arranged at the other end in the width direction, the adjacent lids 10 'are reliably connected and fixed to each other. At the time of removal work, the other fixing bolt 92c is removed and one fixing bolt 92c is loosened, and the other lid 10 'is removed upward.

  As described above, according to the present embodiment, the lid 10 'adjacent to each other is directly sandwiched and supported by the lower metal fitting 92b and the upper metal fitting 92a, and the lower metal fitting 92b and the upper metal fitting 92a are supported by the lid 10. Is fixed by the two fixing bolts 92c with ′ interposed therebetween, so that the lids 10 ′ are securely and firmly connected to each other, and can be prevented from being detached from the grooves 11 and scattered. Moreover, the installation work is easy with little looseness. Further, since the gap between the lid end faces 10d 'is covered by the upper metal fitting 92a, it is possible to prevent dust or the like from entering the groove without forming an opening in that portion. Furthermore, since the structure of the lower metal fitting 92b and the upper metal fitting 92a is simple, it is possible to reduce manufacturing effort and cost. Moreover, if the fixing bolt 92c of the connector 92 is loosened, only the lid body 10 'can be removed from the groove 11. Of course, since an aluminum plate is used as the lid 10 ', the volume is small and light.

  FIG. 18 shows a configuration in which a plurality of groove lids according to the tenth embodiment of the present invention are arranged, and FIG. 19 shows a configuration of each projecting tool in this embodiment. In FIG. 18, a striped pattern provided on the upper surface of the lid 10 'is omitted.

In this embodiment, the lid body 10 'is in contact with the surfaces of the bending ribs 10a' and 10b 'of the lid bodies adjacent to each other, but the lid body end face 10d' is not in contact with each other. A plurality are installed along the groove 11 with a gap between them. The projecting tool 102 is provided at the position of the bending ribs in contact with each other between the two lids 10 'adjacent to each other. In particular, in this embodiment, the bending ribs 10a 'and 10b' have inclined side surfaces whose widths become narrower toward their tips, that is, end surfaces 10a ₁ 'and 10b ₁ ' in the width direction.

In the present embodiment, the configuration in which a projecting tool is used in place of the coupling tool and the clearance of the end face of the lid is removed is the same as that in the first embodiment shown in FIGS. In the present embodiment, two projecting tools 102 are provided side by side in the width direction for each of the two lids 10 'adjacent to each other, and FIGS. 18 (A) and 18 (C) and FIGS. As shown in (B), these projecting tools 102 are provided by utilizing the gaps between the end faces 10a ₁ ′ and 10b ₁ ′ in the width direction of the bending ribs 10a ′ and 10b ′ and the inner wall of the groove 11. ing.

As shown in detail in FIG. 19, each projecting tool 102 is provided on the upper surface of the lid 10 'adjacent to each other, and the width direction of the upper metal fitting 102a covering the gap and the bending ribs 10a' and 10b '. the end surface 10a ₁ of the 'and 10b _1' and is provided in the gap between the inner wall of the groove 11, and the lower bracket 102b abuts on the inner wall surfaces of the end faces 10a ₁ 'and 10b _1' and the groove 11, the upper The metal fitting 102a and the lower metal fitting 102b are connected and fixed to each other, and an adjustment bolt 102c capable of shortening the distance between the two is provided. The upper metal fitting 102a, the lower metal fitting 102b, and the adjusting bolt 102c are made of, for example, iron or stainless steel having rigidity.

The upper metal fitting 102a is not limited to this dimension, but, for example, by pressing a strip-shaped metal plate having a size of about 30 mm × 100 mm × 3 mm, a vertical metal formed on _one end 102a ₁ is formed. and it includes a bent portion, which is formed between the end portion 102a ₁ and the other end portion 102a ₂ of the one, and a through-hole 102a ₃ for adjustment bolt 102c.

The lower metal fitting 102b is not limited to this size, but for example, a screw hole 102b ₁ for the adjusting bolt 102c formed by pressing a strip-shaped metal plate having a size of about 30 mm × 23 mm × 3 mm. It has.

  A method for fixing the adjacent lids 10 ′ to the groove 11 using the projecting tool 102 will be described below.

Before the installation work, the brace 102 is in a state where the upper metal fitting 102a and the lower metal fitting 102b are assembled by the adjusting bolt 102c. That is, previously screwed into the screw holes 102b ₁ of the lower bracket 102b of the adjusting bolt 102c through the through holes 102a ₃ of the upper bracket 102a. However, the adjustment bolt 102c is not tightened and is left loose. Alternatively, it is acceptable to crush threads of the distal end portion of the adjusting bolt 102c, it kept so as not to escape from the screw hole 102b ₁ of the bottom bracket 102b. At the time of installation work, the brace 102 is arranged so that the lower metal fitting 102b is positioned between the bent rib 10b 'of one lid 10' installed in the groove 11 and the inner wall surface of the groove 11, and the other The lid 10 'is placed in the groove 11 so that the ribs 10a' and 10b 'are in contact with each other. Accordingly, the lower metal fitting 102b is positioned in the gap between the end faces 10a ₁ ′ and 10b ₁ ′ in the width direction of the bent ribs 10a ′ and 10b ′ and the inner wall of the groove 11. Next, the upper metal fitting 102a is placed on the lid body 10 'so as to cover the gap between the lid body end faces 10d' in the lid bodies 10 'adjacent to each other. At that time, the tip of the bent portion formed in _one end portion 102 a ₁ abuts on the upper surface of the groove 11. In this state, fastening the adjustment bolt 102c through the through holes 102a ₃ of the upper bracket 102a is screwed into the screw holes 102b ₁ of the lower bracket 102b, the distance between the upper bracket 102a and the lower brackets 102b of the突張rig 102 Adjust so that becomes shorter. As a result, the lower metal fitting 102b projects between the end faces 10a ₁ ′ and 10b ₁ ′ in the width direction of the bent ribs 10a ′ and 10b ′ and the inner wall of the groove 11, so that the adjacent lids 10 ′ are formed in the groove 11. Fixed. The adjacent lid body 10 ′ is securely fixed to the groove 11 by performing the same stretching process on the projecting tool 102 disposed at the other end in the width direction. At the time of removal, the adjustment bolt 102c is loosened, one lid 10 'is removed, the projecting tool 102 is removed, and the other lid 10' is removed.

Thus, according to the present embodiment, the lower metal fitting 102b is stretched between the end faces 10a ₁ ′ and 10b ₁ ′ in the width direction of the bent ribs 10a ′ and 10b ′ and the inner wall of the groove 11, thereby Since 10 'can be fixed to the groove 11, the lid body 10 is securely fixed to the groove 11 and is reliably prevented from being detached from the groove 11 and scattered. Moreover, the installation work is easy with little looseness. Further, since the fixing can be performed by one adjustment bolt 102c, the configuration is simplified. Furthermore, since it is not necessary to provide a through hole in the lid 10 ', workability is good. Moreover, if the adjustment bolt 102c is loosened, only the lid 10 'can be removed from the groove 11. Of course, since an aluminum plate is used as the lid 10 ', the volume is small and light.

  FIG. 20 shows a configuration in which a plurality of groove lids according to the eleventh embodiment of the present invention are arranged, and FIG. 21 shows a configuration of each projecting tool in this embodiment. In FIG. 20, the display of the striped pattern provided on the upper surface of the lid 10 'is omitted.

In this embodiment, the lid body 10 'is in contact with the surfaces of the bending ribs 10a' and 10b 'of the lid bodies adjacent to each other, but the lid body end face 10d' is not in contact with each other. A plurality are installed along the groove 11 with a gap between them. A projecting tool 112 is provided at the position of the bending ribs in contact with each other between the two lids 10 'adjacent to each other. In particular, in this embodiment, the bending ribs 10a 'and 10b' have inclined side surfaces whose widths become narrower toward their tips, that is, end surfaces 10a ₁ 'and 10b ₁ ' in the width direction.

In the present embodiment, the configuration in which a projecting tool is used in place of the coupling tool and the clearance of the end face of the lid is removed is the same as that in the first embodiment shown in FIGS. In the present embodiment, two projecting tools 112 are provided side by side in the width direction for every two lids 10 'adjacent to each other, as shown in FIGS. 20 (A) and 20 (C) and FIG. These projecting tools 112 are provided by utilizing gaps between the end faces 10a ₁ ′ and 10b ₁ ′ in the width direction of the bending ribs 10a ′ and 10b ′ and the inner wall of the groove 11.

As shown in detail in FIG. 21, each projecting tool 112 is provided on the upper surface of the lid 10 ′ adjacent to each other, and the width direction of the upper metal fitting 112 a covering the gap and the bending ribs 10 a ′ and 10 b ′. the end surface 10a ₁ of the 'and 10b _1' and is provided in the gap between the inner wall of the groove 11, and the lower bracket 112b abuts on the inner wall surfaces of the end faces 10a ₁ 'and 10b _1' and the groove 11, the upper The metal fitting 112a and the lower metal fitting 112b are connected to each other, and an adjustment bolt 112c for adjusting the distance between the two and a nut 112d to which the adjustment bolt 112c is screwed are provided. The upper metal fitting 112a, the adjusting bolt 112c and the nut 112d are made of, for example, iron or stainless steel having rigidity. On the other hand, the lower metal fitting 112b is formed of, for example, iron or stainless steel having elasticity.

The upper metal fitting 112a is not limited to this dimension, but for example, by pressing a strip-shaped metal plate having a size of about 30 mm × 100 mm × 3 mm, a vertical metal formed on _one end 112a ₁ is formed. and it includes a bent portion, which is formed between the end portion 112a ₁ and the other end portion 112a ₂ of the one, and a through-hole 112a ₃ for adjustment bolt 112c.

Although the lower metal fitting 112b is not limited to this dimension, for example, the through hole 112b ₁ for the adjustment bolt 112c formed by pressing a strip-shaped metal plate having a size of about 30 mm × 23 mm × 3 mm. It has.

  A method for fixing the adjacent lids 10 ′ to the groove 11 using the projecting tool 112 will be described below.

Before the installation work, the projecting tool 112 is in a state in which the upper metal fitting 112a and the lower metal fitting 112b are assembled by the adjusting bolt 112c. That is, previously screwed into the screw holes 112b ₁ of the lower bracket 112b of the adjusting bolt 112c through the through holes 112a ₃ of the upper bracket 112a. However, the adjustment bolt 112c is not tightened and is left loose. Alternatively, it is acceptable to crush threads of the distal end portion of the adjusting bolt 112c, it kept so as not to escape from the screw hole 112b ₁ of the bottom bracket 112b. At the time of the installation work, the brace 112 is disposed so that the lower metal fitting 112b is positioned between the bent rib 10b 'of one lid 10' installed in the groove 11 and the inner wall surface of the groove 11, and the other The lid 10 'is placed in the groove 11 so that the ribs 10a' and 10b 'are in contact with each other. As a result, the lower metal fitting 112b is positioned in the gap between the end faces 10a ₁ ′ and 10b ₁ ′ in the width direction of the bent ribs 10a ′ and 10b ′ and the inner wall of the groove 11. Next, the upper metal fitting 112a is placed on the lid body 10 'so as to cover the gap between the lid body end faces 10d' in the lid bodies 10 'adjacent to each other. At that time, the tip of the bent portion formed at _one end 112 a ₁ contacts the upper surface of the groove 11. In this state, fastening the adjustment bolt 112c through the through holes 112a ₃ of the upper bracket 112a is screwed into the screw holes 112b ₁ of the lower bracket 112b, the distance between the upper bracket 112a and the lower brackets 112b of the突張rig 112 Adjust so that becomes shorter. As a result, the lower metal fitting 112b is stretched between the end faces 10a ₁ ′ and 10b ₁ ′ in the width direction of the bent bending ribs 10a ′ and 10b ′ and the inner wall of the groove 11, so that the adjacent lids 10 ′ are formed in the groove 11 Fixed to. For the projecting tool 112 disposed at the other end in the width direction, the adjacent cover body 10 ′ is securely fixed to the groove 11 by performing the same process. At the time of removal, the adjustment bolt 112c is loosened, one lid 10 'is removed, the projecting tool 112 is removed, and the other lid 10' is removed.

Thus, according to the present embodiment, the elastic lower metal part 112b is stretched between the end faces 10a ₁ ′ and 10b ₁ ′ in the width direction of the bent ribs 10a ′ and 10b ′ and the inner wall of the groove 11. Since the lid body 10 ′ can be fixed to the groove 11, the lid body 10 is securely fixed to the groove 11 and is reliably prevented from being separated from and scattered from the groove 11. Moreover, the installation work is easy with little looseness. Further, since the fixing can be performed by one adjustment bolt 112c, the configuration is simplified. Furthermore, since it is not necessary to provide a through hole in the lid 10 ', workability is good. Moreover, if the adjustment bolt 112c is loosened, only the lid 10 'can be removed from the groove 11. Of course, since an aluminum plate is used as the lid 10 ', the volume is small and light.

  FIG. 22 shows a configuration in which a plurality of groove lids according to the twelfth embodiment of the present invention are arranged, and FIG. 23 shows a configuration of each projecting tool in this embodiment. In addition, in FIG. 22, the display of the striped pattern provided on the upper surface of the lid 10 is omitted.

  In this embodiment, a plurality of lids 10 are installed along the grooves 11 with the surfaces of the bending ribs 10a and 10b of the lids adjacent to each other and the lid body end surface 10d (see FIG. 2) in contact with each other. . The projecting tool 122 is provided in the vicinity of the bending ribs 10a and 10b in contact with each other between the two lid bodies 10 adjacent to each other (both ends in the direction perpendicular to the width direction of the lid body 10). That is, as shown in FIG. 22 (A), a total of four struts 122 are provided at each of the four corners of each lid 10.

  In the present embodiment, the configuration excluding the use of a projecting tool instead of the connector is the same as that of the first embodiment shown in FIGS.

  As shown in detail in FIG. 23, each projecting tool 122 is fixed to the back surface of the lid body 10, a metal fitting 122 a that provides a thrust force with the groove 11, a locking nut 122 b, and the nut The fixing bolt 122c (FIG. 22 (A)) screwed to 122b is provided. These nuts 122b and fixing bolts 122c are made of, for example, iron or stainless steel having rigidity. On the other hand, the metal fitting 122a is formed of, for example, iron or stainless steel having elasticity.

The metal fitting 122a is not limited to this dimension. For example, the metal fitting 122a is formed on _one end 122a ₁ by pressing a strip-shaped elastic metal plate having a size of about 30 mm × 70 mm × 1 mm. A vertical bent portion and a through-hole 122a ₃ for the fixing bolt 122c formed in the other end portion 122a ₂ are provided.

  A method of fixing the lid body 10 to the groove 11 using the projecting tool 122 will be described below.

Before the installation work, the projecting tool 122 is assembled to the lid 10. That is, previously screwed into the screw hole 122a ₃ and the nut 122b for locking the bracket 122a through the through-holes (not shown) of the lid 10 of the fixing bolt 122c. However, the fixing bolt 122c is not tightened but is kept loose. Alternatively, it is acceptable to crush threads of the distal end portion of the fixing bolt 122c, it kept so as not to escape from the screw hole 122a ₃ of the bracket 122a. During the installation work, the lid body 10 is installed in the groove 11 so that _one end 122a1 of the metal fitting 122a faces the inner wall surface of the groove 11. Then tighten the fixing bolt 122c, that inclined are fitting 122a is made to be horizontal,突張because pressed in contact with the inner wall surface of the one end portion 122a ₁ is groove 11 of the突張rig 122, The lid 10 is fixed to the groove 11. Since the brace 122 is disposed along the bent ribs 10a and 10b of the lid 10 that are in contact with each other, the brace 122 does not rotate. The lid body 10 is securely fixed to the groove 11 by performing the same stretching process on all the stretching tools 122 at the four corners of the lid body 10. At the time of removal work, the fixing bolt 122c is loosened and the lid body 10 is removed.

  As described above, according to the present embodiment, the lid 10 can be fixed to the groove 11 by the elastic metal fitting 122a projecting between the inner wall of the groove 11 and the lid 10 can be securely fitted to the groove 11. It is firmly fixed and is surely prevented from detaching and scattering from the groove 11. Moreover, the installation work is easy with little looseness. Further, since the fixing can be performed by one fixing bolt 122c, the configuration is simplified. Furthermore, since it is only necessary to provide one through-hole 10e for one projecting tool 122 for the lid 10, workability is good. Moreover, if the fixing bolt 122c is loosened, only the lid 10 can be removed from the groove 11. Of course, since an aluminum plate is used as the lid 10, the volume is small and light.

  FIG. 24 shows a configuration in which a plurality of groove lids according to the thirteenth embodiment of the present invention are arranged, and FIG. 25 shows a configuration of each projecting tool in this embodiment. In FIG. 24, the display of the striped pattern provided on the upper surface of the lid 10 is omitted.

  In this embodiment, a plurality of lids 10 are installed along the grooves 11 with the surfaces of the bending ribs 10a and 10b of the lids adjacent to each other and the lid body end surface 10d (see FIG. 2) in contact with each other. . A projecting tool 132 is provided at the center of the lid 10 in the direction perpendicular to the width direction. That is, as shown in FIG. 24 (A), a total of two struts 132 are provided for each lid body 10 at the center in the direction perpendicular to the width direction.

  In the present embodiment, the configuration excluding the use of a projecting tool instead of the connector is the same as that of the first embodiment shown in FIGS.

  As shown in detail in FIG. 25, each projecting tool 132 is fixed to the back surface of the lid body 10, and a metal fitting 132a that provides a tension force with the groove 11, a nut 132b, and a screw on the nut 132b. And a fixing bolt 132c (FIG. 24A). The nut 132b and the fixing bolt 132c are made of, for example, iron or stainless steel having rigidity. On the other hand, the metal fitting 132a is made of, for example, iron or stainless steel having elasticity.

The metal fitting 132a is not limited to this dimension. For example, the metal fitting 132a is formed on _one end 132a1 by pressing a strip-shaped metal plate having a size of about 50 mm × 70 mm × 1 mm. A vertical bent portion and a through hole 132a ₃ for the fixing bolt 132c formed in the other end portion 132a ₂ are provided.

  A method of fixing the lid body 10 to the groove 11 using the projecting tool 132 will be described below.

Before the installation work, the projecting tool 132 is in a state assembled to the lid body 10. That is, previously screwed into the screw hole 132a ₃ and the nut 132b for locking the bracket 132a through the through-holes (not shown) of the lid 10 of the fixing bolt 132c. However, the fixing bolt 132c is not tightened and is kept loose. Alternatively, it is acceptable to crush threads of the distal end portion of the fixing bolt 132c, it kept so as not to escape from the screw hole 132a ₃ of the bracket 132a. At the time of installation work, the lid 10 is installed in the groove 11 so that _one end 132a1 of the metal fitting 132a faces the inner wall surface of the groove 11. Then tighten the fixing bolt 132c, that inclined are fitting 132a is made to be horizontal,突張because pressed in contact with the inner wall surface of the one end portion 132a ₁ is groove 11 of the突張rig 132, The lid 10 is securely fixed to the groove 11. Since the brace 132 has a certain length in the extending direction of the groove 11, the brace 132 does not rotate. The adjacent lids 10 are reliably fixed to the grooves 11 by performing the same tensioning process on the tensioning tool 132 disposed at the other end in the width direction. At the time of removal work, the fixing bolt 132c is loosened and the lid 10 is removed.

  As described above, according to the present embodiment, the lid 10 can be fixed to the groove 11 by the elastic metal fitting 132a projecting between the inner wall of the groove 11 and the lid 10 can be securely fitted to the groove 11. It is firmly fixed and is surely prevented from detaching and scattering from the groove 11. Moreover, the installation work is easy with little looseness. Further, since the fixing can be performed by one fixing bolt 132c, the configuration is simplified. Furthermore, since it is only necessary to provide one through-hole 10e for one projecting tool 132 for the lid 10, workability is good. Moreover, if the fixing bolt 132c is loosened, only the lid 10 can be removed from the groove 11. Of course, since an aluminum plate is used as the lid 10, the volume is small and light.

  FIG. 26 shows a configuration in which a plurality of groove lids according to the fourteenth embodiment of the present invention are arranged, and FIG. 27 shows a configuration of each projecting tool in the present embodiment.

  In this embodiment, a plurality of lids 10 are installed along the grooves 11 with the surfaces of the bending ribs 10a and 10b of the lids adjacent to each other and the lid body end surface 10d (see FIG. 2) in contact with each other. . The projecting tool 142 is provided in the vicinity of the bending ribs 10a and 10b in contact with each other between the two lids 10 adjacent to each other (both ends in the direction perpendicular to the width direction of the lid 10). That is, as shown in FIG. 26, a total of two projecting tools 142 are provided at each end of each lid body 10.

  In the present embodiment, the configuration excluding the use of a projecting tool instead of the connector is the same as that of the first embodiment shown in FIGS.

As shown in detail in FIG. 27, each projecting tool 142 has a pair of pressing members 142 a made up of a pair of bar members, one end of which can be pressed against both inner wall surfaces of the groove 11, and a pair of pressing members. A distance adjusting member 142b capable of adjusting the distance between the other end of 142a and the inner wall surface of the groove 11 is provided. Length adjusting member 142b has a supporting portion 142b ₁ which is stationary by adjustment bolt 142b ₃ and the double nuts 142b ₄ for locking the rear surface of the lid 10, has a tapered surface inclined obliquely relative to the vertical direction, An elevating part 142b ₂ capable of moving up and down in the support part 142b ₁ composed of members having two U-shaped cross sections and an adjustment bolt 142b ₃ for moving the elevating part 142b ₂ up and down are provided. The support portion 142b ₁ includes through holes 142b ₁₁ and 142b ₁₂ through which the adjustment bolt 142b ₃ is freely inserted, and through holes 142b ₁₃ and 142b ₁₄ through which the pair of pressing members 142a are freely inserted. The elevating part 142b ₂ includes a through hole 142b ₂₁ through which the adjustment bolt 142b ₃ is freely inserted, and a screw hole 142b ₂₂ .

The support portion 142b ₁ is pressed against the back surface of the lid 10 by a double nut 142b ₄ fixed to the tip of the adjustment bolt 142c and is fixed in position. However, this adjustment bolt 142c is rotatable free with respect to the support portion 142b _1. The adjustment bolt 142b ₃ is a through hole 10e formed in the lid body 10, the through hole 142b ₁₁ of the support portion 142b ₁ , the lifting portion 142b ₂ is a through hole 142b ₂₁ through which the adjustment bolt 142b ₃ is freely inserted, and the lifting portion. through the through-hole 142b ₂₁ of 142b ₂ is screwed into the screw hole 142b ₂₂ of the lifting unit 142b _2, therefore, by rotating the adjustment bolt 142b _3, lifting part 142b ₂ is vertically moved. The other end of the pair of pressing members 142a is slidable on the tapered surface of the lifting portion 142b _2, therefore, when the lift portion 142b ₂ is increased by turning the adjusting bolt 142b _3, the pair of pressing members 142a The other end contacts and presses the inner wall surface of the groove 11.

  The pressing member 142a and the adjusting member 142b are made of, for example, iron or stainless steel having rigidity.

  A method for fixing the lid body 10 to the groove 11 using the projecting tool 142 will be described below.

Before the installation work, the strut 142 is assembled to the lid 10. The strut 142 is fixed in position with respect to the lid 10 by an adjustment bolt 142c penetrating from the upper surface of the lid 10, but is movable. During installation work, the state where the elevating part 142b ₂ is in the most down position, i.e., in a state where the pair of pressing members 142a is most contracted, placing the lid body 10 on the groove 11. Then tighten the adjustment bolt 142c, by raising the elevating part 142b _2, pressed突張because the other end of the pair of pressing members 142a abuts the inner wall surface of the groove 11, the lid 10 is securely in the groove 11 Fixed. Since the brace 142 is disposed along the bent ribs 10a and 10b of the lid 10 that are in contact with each other, the brace 142 does not rotate. At the time of removal work, the adjustment bolt 142c is loosened to release the pressing of the pressing member 142a, and the lid 10 is removed.

Thus, according to the present embodiment, by raising the elevating part 142b ₂ of the adjustment member 142b fixed to the rear surface of the lid 10, one end of the pair of pressing members 142a are both inner wall surfaces of the grooves 11 equivalents By pressing these in contact with each other, a tensile force is generated, and the lid body 10 is securely fixed to the groove 11, so that the lid body can be reliably prevented from detaching and scattering. Moreover, the installation work is easy with little looseness. Further, since the tension can be made by one adjusting bolt 142b ₃ , the configuration is simplified. Furthermore, since it is only necessary to provide one through hole 10e for one projecting tool 142 for the lid 10, workability is good. Moreover, it is possible to remove only the lid 10 from the groove 11 by loosening the adjustment bolt 142b ₃ of突張tool 142. Of course, since an aluminum plate is used as the lid 10, the volume is small and light.

FIG. 28 schematically shows a partial configuration of the distance adjusting member according to one modification of the present embodiment. In the embodiment of FIGS. 26 and 27, the distance adjusting member is configured to slide the other end of the pressing member on the taper surface of the elevating part and move the one end toward the inner wall surface. The distance adjusting member includes a strip-shaped rotating member 142b ₂ ′ in which the other end of the pressing member 142a ′ is connected to a position displaced from the rotating shaft, and the rotating member 142b ₂ ′ is rotated with respect to the rotating shaft. Thus, one end of the pressing member 142a 'is moved in the direction of the inner wall surface. The other configuration, the fixing method of the lid body 10 to the groove 11 and the operation and effect in this modification are the same as those in the embodiment of FIGS.

FIG. 29 schematically shows a partial configuration of a distance adjusting member according to another modification of the present embodiment. In the present modification, a distance adjusting member equipped with a "second end rotation member 142b 2 of the disk-shaped linked to a position offset from the rotational axis of _the" pressing member 142a, times the rotating member 142b 2 _" One end of the pressing member 142a ″ is moved in the direction of the inner wall surface by rotating with respect to the moving shaft. The other configuration, the fixing method of the lid body 10 to the groove 11 and the operation and effect in this modification are the same as those in the embodiment of FIGS.

  FIG. 30 shows a configuration in which a plurality of groove lids according to the fifteenth embodiment of the present invention are arranged. In addition, in FIG. 30, the display of the striped pattern provided on the upper surface of the lid 10 is omitted.

  In this embodiment, a plurality of lids 10 are installed along the grooves 11 with the surfaces of the bending ribs 10a and 10b of the lids adjacent to each other and the lid body end surface 10d (see FIG. 2) in contact with each other. . Two connecting fixtures 152 are provided at both ends in the width direction of the bending ribs 10a and 10b in contact with each other of the two lids 10 adjacent to each other. A notch groove 10g is provided on both side surfaces of the bending ribs 10a and 10b.

  In the present embodiment, the configuration excluding the use of a connection fixture in place of the connection tool and the notch groove is the same as that in the first embodiment shown in FIGS. 1 and 2.

  As shown in FIG. 30, the connection fixture 152 includes a metal fitting 152a having an L-shaped cross section and an anchor bolt 152b. These metal fittings 152a and anchor bolts 152b are made of, for example, iron or stainless steel having rigidity.

  One end of the metal fitting 152a is engaged with a notch groove 10g opened on the side surfaces of the bent ribs 10a and 10b, and the other end of the metal fitting 152a is fixed to the inner wall surface of the groove 11 by an anchor bolt 152b. Yes.

  A method for fixing the lid 10 to the groove 11 using the connection fixture 152 will be described below.

  Before the installation work, the metal fitting 152a of the connection fixture 152 is fixed to the inner wall surface of the groove 11. That is, the metal fittings 152a of the two connecting fixtures 152 are fixed at predetermined positions on the inner wall surface of the groove 11 by the anchor bolts 152b. At the time of installation work, first, the lid body 10 is placed on the groove 11 at a position where the bent ribs 10a and 10b do not contact the two metal fittings 152a. Next, the lid body 10 is shifted in the extending direction of the groove 11 (perpendicular to the width direction), and the notched grooves 10g of the bending ribs 10a and 10b are engaged with these two metal fittings 152a. Thereby, the lid body 10 is securely fixed to the groove 11. At the time of the removal work, a gap is formed between the lid bodies 10 adjacent to each other, and one lid body 10 is shifted to a position where the notch grooves 10g of the bending ribs 10a and 10b come out of the two metal fittings 152a. Remove to.

  Thus, according to this embodiment, since the metal fitting 152a engaged with the notch groove 10g of the bending ribs 10a and 10b is fixed to the inner wall surface of the groove 11 by the anchor bolt 152b, the lid body 10 has the groove 11 is securely and firmly fixed to the groove 11, and can be reliably prevented from detaching and scattering from the groove 11. Moreover, the installation work is easy with little looseness. Further, since the fixing can be performed by one anchor bolt 152b, the configuration becomes simple. Furthermore, since it is not necessary to provide a through hole in the lid body 10, workability is good. In addition, only the lid 10 can be removed from the groove 11 by shifting the cutout groove 10g of the lid 10 from the metal fitting 152a. Of course, since an aluminum plate is used as the lid 10, the volume is small and light.

  FIG. 31 shows a configuration in which a plurality of groove lids according to the sixteenth embodiment of the present invention are arranged. In addition, in FIG. 31, the display of the striped pattern provided in the upper surface of the cover body 10 is abbreviate | omitted.

  In this embodiment, a plurality of lids 10 are installed along the grooves 11 with the surfaces of the bending ribs 10a and 10b of the lids adjacent to each other and the lid body end surface 10d (see FIG. 2) in contact with each other. . Two connecting fixtures 162 are provided at both ends in the width direction of the bending ribs 10a and 10b in contact with each other of the two lids 10 adjacent to each other.

  In the present embodiment, the configuration excluding the use of a connection fixture instead of the connection tool is the same as that of the first embodiment shown in FIGS.

  As shown in FIG. 31, the connection fixture 162 of the present embodiment is an anchor bolt made of, for example, iron or stainless steel having rigidity.

  The lid body 10 is directly fixed to the groove 11 by an anchor bolt that passes through a through-hole provided in the lid body 10 at the center portion in the direction perpendicular to the width direction of each lid body 10.

  A method for fixing the lid 10 to the groove 11 using the connecting fixture 162 will be described below.

  Before the installation work, a through hole 10 e is opened at a predetermined position of the lid body 10, and an anchor is embedded at a position corresponding to this on the upper surface of the groove 11. At the time of installation work, the lid body 10 is installed, and bolts are screwed into the embedded anchors through the through holes 10e to be fastened and fixed. Thereby, the lid body 10 is securely fixed to the groove 11. At the time of removal work, the bolt is removed and the lid 10 is removed.

  Thus, according to the present embodiment, the coupling fixture 162 that is an anchor bolt is directly fixed to the upper surface of the groove 11, so that the lid body 10 is securely and firmly fixed to the groove 11, It is possible to reliably prevent separation and scattering from the groove 11. Moreover, the installation work is easy with little looseness. Moreover, since it can be fixed by one anchor bolt, the configuration is simplified. Furthermore, since it is only necessary to provide one through hole 10e for one anchor bolt in the lid 10, workability is good. Moreover, only the lid 10 can be removed from the groove 11 by removing the anchor bolt. Of course, since an aluminum plate is used as the lid 10, the volume is small and light.

  FIG. 32 shows a configuration in which a plurality of groove lids according to the seventeenth embodiment of the present invention are arranged. In FIG. 32, the display of the striped pattern provided on the upper surface of the lid 10 is omitted.

  In this embodiment, a plurality of lids 10 are installed along the grooves 11 with the surfaces of the bending ribs 10a and 10b of the lids adjacent to each other and the lid body end surface 10d (see FIG. 2) in contact with each other. . Two connecting fixtures 172 are provided at both ends of the lid 10 in the center in the direction perpendicular to the width direction.

  In the present embodiment, the configuration excluding the use of a connection fixture instead of the connection tool is the same as that of the first embodiment shown in FIGS.

  As shown in FIG. 32, the connection fixture 172 includes a metal fitting 172a, a fixing bolt 172b, and an anchor bolt 172c having an L-shaped cross section. These metal fittings 172a, fixing bolts 172b, and anchor bolts 172c are made of, for example, iron or stainless steel having rigidity.

  One end of the metal fitting 172a is provided with a screw hole for a fixing bolt 172b inserted through a through hole 10e provided in the lid 10, and the other end of the metal fitting 172a has an anchor bolt 172c. A through hole is provided. A through hole may be provided at one end of the metal fitting 172a in place of the screw hole, and the fixing bolt 172b may be screwed into the nut and fixed, or the nut is fixed to the through hole by welding. You may comprise so that the volt | bolt 172b may be screwed and fixed to this nut.

  A method for fixing the lid 10 to the groove 11 using the connection fixture 172 will be described below.

  Before the installation work, the metal fitting 172a of the connection fixture 172 is fixed to the inner wall surface of the groove 11. That is, the metal fittings 172a of the two connecting fixtures 172 are fixed at predetermined positions on the inner wall surface of the groove 11 by the anchor bolts 172b. At the time of installation work, first, the lid body 10 is placed at a predetermined position on the groove 11. Next, the two fixing bolts 172b are screwed into the screw holes of the two metal fittings 172a through the two through holes 10e of the lid body 10, respectively. Thereby, the lid body 10 is securely fixed to the groove 11. At the time of removal work, the fixing bolt 172c is removed and the lid body 10 is removed.

  Thus, according to this embodiment, since the metal fitting 172a fixed to the inner wall surface of the groove 11 by the anchor bolt 172c is fixed to the lid body 10 by the fixing bolt 172b, the lid body 10 is surely attached to the groove 11. In addition, it is firmly fixed and can be reliably prevented from detaching from the groove 11 and scattering. Moreover, the installation work is easy with little looseness. Moreover, since it can fix with the one anchor bolt 172c and the one fixing bolt 172b, a structure becomes simple. Furthermore, since it is sufficient to provide one through hole in the lid body 10 for one connection fixture 172, workability is good. Moreover, if the fixing bolt 172b is loosened and removed, only the lid 10 can be removed from the groove 11. Of course, since an aluminum plate is used as the lid 10, the volume is small and light.

  FIG. 33 shows the structure of the groove cover according to the eighteenth embodiment of the present invention. However, in the present embodiment, the upper surface of the groove 11 'has a two-stage structure of an upper stage 11a' and a lower stage 11b '.

  In the present embodiment, a plurality of lids 10 are installed along the grooves 11 ′ in a state where the surfaces of the bending ribs 10 a and 10 b of the lids adjacent to each other and the lid body end surface 10 d (see FIG. 2) are in contact with each other. The Two connecting fixtures 182 are provided at both ends in the width direction of the bending ribs that are in contact with each other of the two lids 10 adjacent to each other.

  In the present embodiment, the configuration excluding the use of the coupling fixture instead of the coupling tool and the structure of the groove is the same as in the case of the first embodiment shown in FIGS.

  As shown in FIG. 33, each connection fixture 182 of this embodiment includes a metal fitting 182a and an anchor bolt 182b for fixing the metal fitting 182a to the groove 11 '. The metal fitting 182a and the anchor bolt 182b are made of, for example, iron or stainless steel having rigidity.

Both ends of each lid 10 in the width direction are placed on the lower step 11b 'of the groove 11', and the upper surface of the lid 10 is formed by a vertical bent portion provided at _one end 182a1 of the metal fitting 182a. It is pressed. The other end of the fitting 182a 182a ₂ is disposed on the 'upper 11a' of grooves 11, and is fixed in the groove 11 'by anchor bolts 182b through the through hole formed in an end portion 182a _2.

  A method for fixing the lid 10 to the groove 11 ′ using the connecting fixture 182 will be described below.

  Before the installation work, an anchor is embedded in a predetermined position of the upper stage 11a 'of the groove 11'. At the time of installation work, the lid body 10 is placed on the lower step 11b ′ of the groove 11 ′, and then a bolt is screwed to the embedded anchor through the through hole of the metal fitting 182a to be fastened and fixed. Thereby, the cover body 10 is reliably fixed to the groove | channel 11 'via the metal fitting 182a. At the time of removal work, the bolt is removed and the lid 10 is removed.

  Thus, according to this embodiment, since the metal fitting 182a is directly fixed to the upper surface of the groove 11 ′ by the anchor bolt 182b, the lid body 10 is securely and firmly fixed to the groove 11 ′. It is possible to reliably prevent separation and scattering from the groove 11 '. Moreover, the installation work is easy with little looseness. Further, since the fixing can be performed by one anchor bolt 182b, the configuration becomes simple. Furthermore, since it is not necessary to provide a through hole in the lid body 10, workability is good. Moreover, if the anchor bolt 182b is loosened, only the lid 10 can be removed from the groove 11. Of course, since an aluminum plate is used as the lid 10, the volume is small and light.

  FIG. 34 shows the structure of the groove lid according to the nineteenth embodiment of the present invention.

  In the present embodiment, a plurality of lids 10 are installed along the grooves in a state where the surfaces of the bending ribs 10a and 10b of the lids 10 adjacent to each other and the lid body end surface 10d (see FIG. 2) are in contact with each other. . A plurality of connecting fixtures 192 are provided side by side in the width direction of the bending ribs that are in contact with each other of the two lids 10 adjacent to each other.

  In the present embodiment, the configuration excluding the use of a connection fixture instead of the connection tool is the same as that of the first embodiment shown in FIGS.

  As shown in FIG. 34, each connecting fixture 192 of this embodiment includes a fixing bolt 192a and a nut 192b inserted through through holes (not shown) formed in the bending ribs 10a and 10b. The fixing bolt 192a and the nut 192b are made of, for example, iron or stainless steel having rigidity.

  A method for fixing the lid 10 to the groove 11 using the connection fixture 192 will be described below.

  Before the installation work, a plurality of through holes that penetrate the bending ribs 10a and 10b of the lid 10 adjacent to each other are formed side by side in the width direction. At the time of installation work, outside the groove 11, the bending ribs 10a and 10b of several lid bodies 10 (the number of lid bodies that do not scatter) are mutually fixed by fixing bolts 192a and nuts 192b passing through the through holes. The plurality of lids 10 are connected to each other by screwing, and the connected ones are installed in the groove 11. At the time of the removal work, the one in which several lids 10 (the number of lids that do not scatter) is connected from the groove 11 and each connection fixture 192 is removed to release the connection of the lids 10. To do.

  Thus, according to this embodiment, since the bending ribs 10a and 10b are directly fixed by the plurality of fixing bolts 192a, the lids 10 are reliably connected and fixed, and are detached from the grooves 11 and scattered. Can be reliably prevented. Moreover, the installation work is easy with little looseness. Further, since the fixing is possible only with the fixing bolt, the configuration becomes simple. Furthermore, since it is only necessary to provide one through hole 10e for one fixing bolt 192a for the lid 10, workability is good. Of course, since an aluminum plate is used as the lid 10, the volume is small and light.

  FIG. 35 shows the structure of the groove lid according to the twentieth embodiment of the present invention.

  In the present embodiment, two types of lid bodies 10 and 10 ″ are used. One lid body 10 is perpendicular to the width direction of the lid body 10 in the same manner as the lid bodies of the first to nineteenth embodiments. Folding ribs 10a and 10b are formed at both ends of the lid. The other lid body 10 "includes flanges 10h" and 10i "that extend horizontally outward from the ends of the bending ribs 10a" and 10b ". .

  The lids 10 and 10 ″ are alternately arranged on the grooves so that the bending ribs 10a and 10b of the lid 10 are placed on the flanges 10h ″ and 10i ″ of the lid 10 ″, respectively. A connecting fixture 202 is provided at both ends in the width direction, which is the center of the lid 10 in the direction perpendicular to the width direction. Each connecting fixture 202 is made of, for example, iron or stainless steel having rigidity, and is composed of an anchor bolt fixed in the groove.

  The lid 10 ″ has its flanges 10h ″ and 10i ″ fixed by the bent ribs 10a and 10b of the adjacent lid 10, and the lid 10 is fixed to the groove by a connecting fixture 202 that is an anchor bolt. Therefore, all the lids 10 and 10 ″ are connected and fixed.

  A method for fixing the lids 10 and 10 ″ to the groove 11 in this embodiment will be described below.

  Before the installation work, a through hole 10 e is opened at a predetermined position of the lid body 10, and an anchor is embedded at a position corresponding to this on the upper surface of the groove 11. At the time of installation work, first, the lid body 10 ″ is placed on the groove 11, and the lid body 10 is placed on the groove 11 adjacent to the lid body 10 ″. The bending ribs 10a and 10b of the lid 10 are placed on the flanges 10h ″ and 10i ″, respectively. Next, the lid 10 is fastened and fixed by screwing a bolt into the anchor embedded through the through hole 10e. Thereby, both the lids 10 and 10 ″ are securely fixed to the groove 11. During the removal operation, if the bolt 10 is removed and the lid 10 is removed, the lid 10 ″ adjacent thereto can be removed. it can.

  As described above, according to the present embodiment, the lid 10 ″ and the normal lid are mounted so that the bending ribs 10a and 10b of the lid 10 are placed on the flanges 10h ″ and 10i ″ of the lid 10 ″. Since the lid bodies 10 are alternately arranged, the lid body 10 and the lid body 10 ″ are securely coupled and fixed by simply fixing the ordinary lid body 10 with the coupling fixture 202, which is an anchor bolt. It is possible to reliably prevent detachment and scattering from the surface, and it is easy to install with little anchoring, and can be fixed with one anchor bolt, thus simplifying the configuration. Therefore, it is only necessary to provide one through-hole 10e for one connector 202. Therefore, the workability is good, and if the connector 202, which is a fixing bolt, is loosened, the lid 10 and the lid 10 adjacent thereto. ″ From groove 11 Can Rihazusu. Of course, since an aluminum plate is used as the lid 10 and the lid 10 ″, the volume is small and the weight is light.

  In addition, the connecting tool in any one of the first to ninth embodiments described above, the strut tool in any of the tenth to fourteenth embodiments described above, and / or the fifteenth to nineteenth embodiments described above. The groove lid may be configured by combining with any of the connecting fixtures. For example, a plurality of lids are connected to each other with the coupler of the first, second, fourth, eighth, or ninth embodiment, and a part of the lids is connected to that of the twelfth or thirteenth embodiment. You may comprise so that it may fix to a groove | channel with a brace or a 16th connection fixing tool.

  All the embodiments described above are illustrative of the present invention and are not intended to be limiting, and the present invention can be implemented in other various modifications and changes. Therefore, the scope of the present invention is defined only by the claims and their equivalents.

10, 10 ', 10 "lid 10a, 10a', 10b, 10b ', 10a", 10b " bent rib 10c cuts 10d, 10d' lid end face _{10e, 10e ', 10f, 12a} 2, 22a 2, 32a 2 , 42a ₂ , 82a ₄ , 92a ₁ , 102a ₃ , 112a ₃ , 112b ₁ , 122a ₃ , 132a ₃ , 142b ₁₁ , 142b ₁₂ , 142b ₁₃ , 142b ₁₄ , 142b ₂₁ through hole 10g notch groove 11, 11 ′ groove 11a 'upper stage 11b' lower stage 12, 22, 32, 42, 52, 62, 72, 82, 92 connector 12a, 22a, 32a, 42a, 82a, 92a, 102a, 112a upper metal fittings 12b, 22b, 32b, 42b, 82b, 92b, 102b, 112b Lower bracket 12c, 22c, 32c 42c, 52c, 82c, 92c, 122c, 132c, 172b, 192a fixing bolt 12a _{1, 22a 1,} 32a ₁ projecting pieces 12b _{1, 22b 1,} 42b ₁ rib support part _{12b 2, 42b 2, 10h "} , 10i" flange Portions 12b ₃ , 22b ₃ , 32b ₃ , 42b ₃ , 52b ₃ , 82b ₅ , 92b ₁ , 102b ₁ , 142b ₂₂ Screw holes 52b, 122a, 132a, 152a, 172a, 182a Metal fitting 52b ₁ Hook 52b ₂ Folding portion 52d , 112d, 122b, 132b, 192b nut 62a tip 72a first end 72b first portion 72c second portion 72d third portion 72e second end 82a ₁ step portion 82a _{2, 82b} 1, 102a _{1 , 112a 1, 122a 1, 132a} 1, 1 2a ₁ one end _{82a 3, 82b 4, 102a 2} , 112a 2, 122a 2, 132a 2, 182a 2 other end 82b ₂ locking piece 82b ₃ bent portion 102,112,122,132,142 strut Tools 10a ₁ ', 10b ₁ ' End faces 102c, 112c, 142b ₃ Adjustment bolts 142a, 142a ', 142a "Pressing member 142b Distance adjusting member 142b ₁ Supporting part 142b ₂ Lifting part 142b ₂ ', 142b ₂ " Rotating member 152, 162, 172, 182, 192, 202 Connecting fixture 152b, 172c, 182b Anchor bolt

Claims (24)

  A metal plate-like lid body having a width wider than the opening width of the groove, and a center portion in the width direction at both ends perpendicular to the width direction of the groove constitutes a bent rib, and engages with the lid body A groove lid comprising: a detachment preventing structure for preventing the detachment of the lid from the groove.   The said separation prevention structure is fixed to the said cover body, and is equipped with the connection tool fixed in the state which mutually contact | abutted the said bending rib of this cover body. The groove lid as described.   The connector has a protruding piece inserted into a gap above the abutting portion of the folding rib in the lids adjacent to each other, and an upper metal fitting that abuts on the upper surface of the lid, and a bottom of the abutting bending rib A lower metal fitting having a U-shaped cross section in contact with the end face; and a fixing bolt for fixing the upper metal fitting and the lower metal fitting to each other through a through-hole provided in one of the lid bodies. The groove cover according to claim 2.   The connector has a protruding piece inserted into a gap above the abutting portion of the bending rib in the lids adjacent to each other, and is provided on the upper metal fitting that abuts on the upper surface of the lid, and the abutting bending rib A lower metal fitting having a U-shaped cross section that is inserted through the formed through-hole and both ends of which are in contact with the lower surface of the lid, and the upper metal fitting and the lower metal fitting are inserted through the through-hole provided in the lid. The groove lid according to claim 2, further comprising fixing bolts that are fixed to each other.   The connecting tool includes an upper metal fitting, a lower metal fitting having a U-shaped cross section that comes into contact with a lower end surface of the bent rib that is in contact with adjacent lids, and the upper metal fitting and the lower metal fitting that are adjacent to each other. The groove lid according to claim 2, further comprising two fixing bolts that are fixed to each other through two through holes provided in the lid body.   The connector is hooked to a fixing bolt that passes through a through-hole provided in the lid, and one end is hooked to the lower end surface of the bending rib that is in contact with the adjacent lid, and the other end is The groove lid according to claim 2, further comprising a metal fitting fixed to the lid body by the fixing bolt.   The connector is hooked on the lower end surface of the bending rib whose one end abuts between adjacent lids, and a portion continuous to the one end is provided on one of the adjacent lids. Is inserted through the formed through-hole and abuts the upper surface of the adjacent lids, and is further inserted into the other through-hole provided in the other lid and hooked to the lower end surface of the bending rib. The groove lid according to claim 2, further comprising a metal fitting continuous to the other end.   The groove lid according to any one of claims 2 to 7, wherein the connector is provided in the center in the width direction of the lid bodies adjacent to each other.   The groove lid according to any one of claims 2 to 7, wherein a plurality of the coupling tools are provided side by side in the width direction of the lid bodies adjacent to each other.   The connector has a locking piece protruding upward at one end, and the one end is inserted through a through-hole provided in one of the lids adjacent to each other. A lower metal fitting abutting on the upper surface of the one lid, an upper metal fitting whose one end is engaged with the locking piece of the lower metal fitting and abutting on the upper surface of the lid, and the lids adjacent to each other A fixing bolt for fixing the other end of the lower metal fitting and the other end of the upper metal fitting to each other through a through hole provided in the other lid body is provided. The groove lid according to claim 2.   The lid includes a rectangular upper metal fitting that contacts the upper surface of the lid, a rectangular lower metal metal that contacts the lower surface of the lid, and the upper and lower metal fittings that are adjacent to each other. The groove lid according to claim 2, further comprising two fixing bolts that are fixed to each other through two through-holes respectively provided in.   The groove lid according to claim 10 or 11, wherein the connector is provided on the outer side in the width direction of the bending rib of the lid bodies adjacent to each other.   The detachment prevention structure is fixed to the lid, and includes a projecting tool for fixing the lid to the groove by pressing each other between the lid and the inner wall surface of the groove. The groove lid according to any one of claims 1 to 12, wherein   The bending rib of the lid body has an inclined side surface whose width becomes narrower toward a tip, and the projecting tool has an upper metal fitting whose one end is in contact with the upper surface of the groove, and the bending rib. A lower fitting having rigidity or elasticity that abuts against the side surface of the groove and the inner wall surface of the groove, and an adjustment bolt capable of connecting and fixing the upper fitting and the lower fitting and shortening the distance therebetween. The groove lid according to claim 13.   The projecting tool includes a metal fitting having one end abutting on and pressing against the inner wall surface of the groove, and a fixing bolt for fixing the other end of the metal fitting to the back surface of the lid. The groove cover according to claim 13.   The groove lid according to claim 15, wherein the projecting tool is provided at both ends in a direction perpendicular to the width direction of the lid body.   The groove lid according to claim 15, wherein the projecting tool is provided at a central portion in a direction perpendicular to the width direction of the lid body.   A pair of pressing members whose one end is in contact with and presses the inner wall surfaces of both of the grooves, and an adjustment member capable of adjusting the distance between the other end of the pair of pressing members and the inner wall surface. The groove lid according to claim 13, comprising:   13. The detachment preventing structure is fixed to the lid body, and includes a connection fixture that directly connects and fixes the lid body and the groove. The groove lid according to item.   The bending rib of the lid body has a notch groove on both side surfaces, and the connecting fixture has an L-shaped cross-section metal fitting whose one end engages with the notch groove, and the L-shaped cross section. The groove lid according to claim 19, further comprising an anchor bolt that fixes the other end of the metal fitting to the inner wall surface of the groove.   The groove lid according to claim 19, wherein the connecting fixture includes an anchor bolt that fixes the lid to the upper surface of the groove.   The groove has a width wider than the opening width of the groove, and the center in the width direction at both ends in the direction perpendicular to the width of the groove constitutes a bent rib and a flange extending from the tip of the bent rib in the horizontal outward direction. A metal plate-like other lid, and the lid and the other on the groove so that the bent rib of the lid abuts on the flange of the other lid. The groove lid according to claim 21, wherein the lids are alternately arranged.   The connecting fixture includes an L-shaped cross-section metal fitting, a fixing bolt for fixing one end of the L-shaped cross-section metal fitting to the lid, and the other end of the L-shaped cross-section metal fitting on the inner wall surface of the groove. The groove lid according to claim 19, further comprising an anchor bolt to be fixed.   The groove lid according to claim 19, wherein the connecting fixture includes a plurality of fixing bolts for fixing the bending ribs of the lid bodies adjacent to each other.

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