JP4076522B2 - Gutter lid - Google Patents

Description

  The present invention relates to a lid and a side groove that can prevent rattling of the lid and generation of noise.

There has been proposed a side groove called a muffler type that has less noise and noise on the lid. The conventional gutter has a backlash caused by manufacturing tolerances between the concrete lid and the gutter body, and noise is generated. In order to prevent this, an elastic body such as rubber is interposed between the lid and the side groove main body to prevent noise. This method had some problems. First, it takes time and effort to attach rubber, and the labor and rubber cost increase the construction cost of the side groove. Furthermore, since rubber can wear out and harden, the effect of preventing rattling and noise generation can diminish over time.
JP 2002-250075 A

  In order to solve the above problem, a side groove has been proposed in which a silencing effect can be obtained without using an elastic body. By changing the shape of the lid support portion (lid receiving portion) of the side groove and the lid contacting the lid support portion, rattling is prevented to obtain a silencing effect. That is, in the system in which an elastic body such as rubber is sandwiched between the lid support portion and the lid, when a load of a vehicle or the like is applied to the lid, the elastic body is thinned between the side groove and the lid, and a silencing effect is obtained. Therefore, the lid receiving portion of the side groove is horizontal, and the back surface of the lid that rides on it is also horizontal.

  On the other hand, the silencing-type side groove has an inclined lid support portion, and the shape of the lid side in contact with the lid support portion is also inclined or curved. By combining these, the lid and the lid support portion are in surface contact. The range is reduced, and the occurrence of rattling is substantially prevented by linearly contacting the lid and the lid support portion.

  In Japanese Patent Laid-Open No. 2002-250075, a support member is provided in parallel to the back surface of the grating lid, and among these support members, a receiving portion (lid support portion or lid receiving portion) formed obliquely to the side groove block. The surface abutting on the inclined surface is formed as an inclined surface, and the inclined surface of the support member is fitted into the receiving portion of the side groove block to prevent rattling. The big problem of the method of reducing the contact area between the lid receiving portion and the lid by fitting the inclined surface of the lid to such an inclined lid receiving portion to prevent rattling is that the uneven weight is applied to the lid. The lid may turn and tilt when added. The situation where the lid turns and falls into the side groove is the worst, but even if the lid does not fall inside the side groove, the lid turns slightly and one upper end of the lid protrudes from the side groove and the other upper end If the car sinks into the gutter, it will be an obstacle to vehicle travel. Further, in the case of a grating cover that is lighter than a concrete cover, if the load is concentrated on one upper end protruding from the side groove, it may lead to a problem that the cover jumps up and is dangerous.

  For this reason, in Japanese Patent Application Laid-Open No. 2002-250075, protrusions are provided on both side walls of the lid body to prevent the lid from turning so that the protrusions abut against the inside of the opening of the side groove block. However, by providing protrusions that protrude from the lid body on both sides to prevent turning, the tolerance between the opening of the side groove block and the lid body is reduced, and the protrusion and opening interfere with each other, making it difficult for the lid to fit into the opening. In this case, there is a possibility that the lid may not fit in the opening. Even when the lid is housed in the opening, in addition to the inclined surface of the support member, protrusions protruding from the lid body on both sides hit the side groove block, increasing the number of contact points between the lid and the side groove block. The possibility of occurrence increases. Therefore, even if it is possible to prevent the lid from turning by providing protrusions on both side walls of the lid main body, the lid is difficult to be accommodated in the opening, and rattling and noise tend to occur.

  Therefore, in the present invention, even if the lid is lighter than a concrete lid such as a grating lid, there is no trouble such as jumping up, it is possible to prevent the occurrence of rattling and noise, and the lid also fits in the opening of the side groove. An object of the present invention is to provide a lid for a side groove that is easy and does not cause a situation in which a tolerance is insufficient and the lid does not fit into the opening.

  For this reason, in the present invention, the lid body covering at least a part of the opening of the side groove and the cross-section attached to the back surface of the lid body so as to be parallel to the longitudinal direction of the side groove are substantially square 2 The bottom surface of the support member at least in the vicinity of both ends in the longitudinal direction provides a lid for a side groove whose outer side in the transverse direction is flat and whose center or inner side protrudes downward from the outer side. In the lid for a side groove having this configuration, the lid main body and the support member can be made of metal, and a highly permeable member such as grating can be adopted as the lid main body. And after attaching a support member to a lid main body by welding etc., the lid for side grooves with high durability can be provided by plating the whole with zinc etc.

  The side groove cover of the present invention can be constructed by combining it with a side groove block having an opening to which the side groove cover is attached. Support member when the lid is fitted into the opening by inclining the inside of the lid receiving portion (lid support portion) of the opening of the side groove block so as to contact the outside of the portion protruding below the bottom surface of the support member The projecting part on the bottom of the lid contacts the inside of the lid receiving part and stops. For this reason, the contact area of a lid | cover receiving part and a lid | cover can be limited, and a side groove with little generation | occurrence | production of rattling and noise can be constructed.

  Furthermore, in the lid of the present invention, a support member having a substantially square cross section is attached in parallel to the back surface of the lid body, and at least the bottom surfaces in the vicinity of both ends of the support members are flat in the transverse direction and in the center. Or the inside protrudes below the outside. Accordingly, the flat portion of the bottom surface of the support member spreads outside the portion protruding so as to be in contact with the inside of the lid receiving portion. For this reason, when the lid is turned in the opening of the side groove block, the flat portion of the bottom surface of the lid support member is in contact with the flat portion outside the lid receiving portion and does not turn. Furthermore, a part of the bottom surface of the support member that absorbs fluctuations in the thickness of the lid main body, not the lid main body whose distance varies from the lid receiving portion, and is always disposed in the vicinity of the lid receiving portion. The bottom part of the support member and the flat part on the outside of the lid receiving part are small, and the lid is rotated by a minute angle. The bottom surface of the support member and the flat portion outside the lid receiving portion come into contact with each other, and the turning stops. Therefore, even if the lid is swung, the corner on the surface side does not largely protrude from the upper surface of the side groove block, and the jumping up of the grating lid can be prevented in advance.

  Furthermore, since the bottom surface of the support member is a stopper for preventing the rotation of the lid of the present invention, it is not necessary to provide a protrusion protruding in the transverse direction from the side surface of the lid to prevent the rotation. Accordingly, the tolerance of the size of the lid with respect to the size of the opening is not reduced, and troubles such as difficulty in opening and closing the lid and the inability to install the lid on the opening can be prevented.

  For this reason, by adopting the lid for the side groove of the present invention, there is no trouble such as splashing and noise, even if the lid is made of metal such as a grating lid and is lighter than the concrete lid. In addition, the lid can be easily accommodated in the opening of the side groove, can be easily maintained, and the lid for the side groove can be provided in which the tolerance is insufficient and the lid does not fit into the opening. The lid of the present invention can be applied even to a U-shaped side groove having a substantially U-shaped cross section and a bottom surface, or a free-gradient side groove having an upper wall and having a bottom surface constructed on site.

  It is also effective to provide a leaf spring that protrudes so as to hit the inner wall of the opening of at least one side groove in the transverse direction of the lid body. An elastic body such as a clip or rubber made of a thin steel plate of about 1 mm can be inserted between the lid for the side groove and the inner wall of the opening to prevent generation of sound due to the interference therebetween. In these methods, elasticity is weak, and noise due to direct contact between the lid and the inner wall of the opening can often be prevented. However, a lid for a side groove in which the lid body tries to prevent rattling or noise from the lid receiving portion by contacting the lid receiving portion of the opening of the side groove with a point or a line. It is difficult to hold the receiving part in an ideal position for contact with a point or line. On the other hand, in a member that has almost no elasticity and is close to a rigid body, it is necessary to ensure a tolerance in order to put a lid on the opening, so that it is not always in contact with the inner wall of the opening. Therefore, it is difficult to hold the lid at an ideal position for noise prevention. For this reason, the leaf spring can be deformed to the extent that it does not become an obstacle when the lid is set in the opening, and on the other hand, has a sufficiently large elastic coefficient so that the position of the lid does not easily shift. Is desirable. Specifically, if the leaf spring has the same thickness as the plate material constituting the lid body, for example, about 4 to 6 mm, there is a high possibility of satisfying those conditions.

  A typical metal lid body is a grating, and the thickness of the side bar forming the lateral side surface of the lid body is suitable as the thickness of the leaf spring. Therefore, it is possible to weld a plate spring having the same thickness to the side bar, and it is also possible to cut and raise a part of the side bar to form a plate spring. When the leaf spring is formed by the method of cutting and raising, the labor of welding can be saved and the manufacturing cost can be reduced.

  If the lid for the side groove is provided with a support member on the back surface of the lid body, the leaf spring can be extended from the side surface in the transverse direction of the support member so as to hit the inner wall of the side groove. However, since the plate spring becomes long, the elastic coefficient tends to be low, and when the plate spring is thick, the tolerance when the lid is set in the opening is easily affected. Therefore, the structure which protrudes a leaf | plate spring from a cover main body is desirable. By projecting the leaf springs so as to hit the inner wall of the opening from both lateral sides of the lid body, the lid body can be held at a position suitable for noise prevention by the balance of the leaf springs on both sides. Alternatively, a leaf spring may be provided only on one side in the transverse direction, and the position of the lid may be held by pressurizing the projection on the bottom surface of the lid body or the support member on the opposite side to the lid receiving portion.

  Further, when a leaf spring is provided only on one side, the side on which the leaf spring is not provided is easier to turn, and the direction in which the lid turns when a load is applied from above can be defined to some extent. Therefore, by arranging the side on which the elastic body is provided when the lid is installed in the opening of the side groove, the direction in which the lid is inclined can be made constant. That is, the lateral groove lid of the present invention stops from the upper side of the bottom surface of the support member attached to the back surface of the lid, while the outer side of the lid receiving portion of the lateral groove body contacts and stops. Is added, it is a small amount of about 1 to 3 mm, but there is a high possibility that the position of the lid is stabilized by turning. Even if the inclination of each lid is slight, if the direction of turning is different between adjacent lids, the inclination direction is different, and further, the difference between the top and bottom of the top surface of the lid widens to about 2 to 6 mm and may stand out. . By attaching an elastic body such as a spring to one side of the lid and placing it on the inside of the opening, the direction in which the lid inclines can be made constant, and the inclination of the lid can be made inconspicuous. The elastic body may be provided on one side in the transverse direction of the lid, and when the lid is attached to the opening, the elastic body is deformed in contact with the inside of the opening. Therefore, a situation where the tolerance is insufficient and the lid does not fit in the opening does not occur.

  In a lid for a side groove in which a support member is provided on the lid body, a metal support member having a substantially square cross section with a protrusion on the bottom surface can be manufactured relatively easily by using a drawing process or the like. However, there are some further problems. First, the bottom surface of the support member is curved so that the center in the transverse direction or the inside protrudes simply, and the center is narrow in the longitudinal direction. The shape that only exists at both ends has a higher silencing effect. If the middle or central portion of the lid in the longitudinal direction is in contact with the lid receiving portion, either one of both ends tends to float, and rattling or noise occurs when the place where the load is applied to the lid changes. This is because the side groove is warped and twisted, so if it is supported from the lid receiving part at the center part in the longitudinal direction of the lid, both ends float, and when the vehicle passes over the lid, the floating part is It is thought that noise is generated by violently colliding with the side groove body. Accordingly, if the protruding portion of the intermediate portion is unnecessary, if there is no intermediate portion, it is necessary to receive all the load applied to the lid at both ends, and a concentrated load is applied to both ends, and both ends are easily deformed. If both ends are deformed, it causes rattling and noise. For this reason, ideally, it is desirable that the intermediate portion bend to a slight extent (about several millimeters) that can absorb the warp and twist of the side groove.

  In order to curve the protruding portion into an arcuate shape, there is a method of bending the support members inward so that the interval between the intermediate portions is narrowed. This should increase the silencing effect. However, such a shape cannot be manufactured by drawing, and becomes a custom-made product in itself and is expensive. Furthermore, it is not easy to mass-produce a support member having a shape curved to about several mm with high accuracy.

  Furthermore, since the thickness of the lid body varies depending on the design conditions, and the size of the lid receiving portion of the side groove block cannot be changed, there is a problem that many types of support members having different sizes are required. The thickness and height of the strength member of the grating called a slit bar or a bearing bar change depending on load conditions such as 2 tons, 6 tons, 8 tons, 10 tons, 20 tons and 25 tons. Furthermore, the size of the slit bar also changes depending on the distance between the slit eyes called narrow and thick. If the support member has a simple cross section, various sizes of support members can be prepared at low cost by a processing method such as drawing or pressing. However, in order to produce cross-sectional shapes with the center or the inner side protruding from the support members of various sizes, various types of press dies are required, which is an economic burden. In addition, enormous costs are required to prepare the support members curved in an arc shape in various sizes. In the present specification, the square cross section is a concept that includes a hollow member such as a square pipe as long as the outline of the cross section is square.

  Therefore, in the present invention, the support member is further divided into a support body having a square cross section and an auxiliary member constituting a protrusion extending in the longitudinal direction. Then, an auxiliary member extending in the longitudinal direction is attached to the center or inside of the bottom surface of the support body, and at least the bottom surface in the vicinity of both ends is flat on the outside in the transverse direction and protrudes below the outside in the center or inside. The lid for the side groove is manufactured by the step of forming the support member. If the lid body and the support member are made of metal, welding can be used for joining the lid body and the support member and joining the support body and the auxiliary member.

  By composing the support member into the support part main body and the auxiliary member, the complicated shape as described above required for the bottom surface of the support member of the silencing lid is the shape of the auxiliary member itself or the bottom face of the support part main body. This can be solved by attaching the auxiliary member to the above. For example, by attaching the auxiliary member only to the bottom surface in the vicinity of both ends without attaching the auxiliary member to the central portion in the longitudinal direction of the support body, adverse effects due to the intermediate portion (center portion) of the portion protruding from the bottom surface can be prevented.

  In addition, the shape of the auxiliary member is such that the central portion in the longitudinal direction has a smaller protruding amount or a narrower width in the transverse direction than the both end portions, thereby adversely affecting the central portion of the portion protruding from the bottom surface. Can be prevented. Furthermore, since the auxiliary member has a smaller cross-sectional area with respect to the support body and can be bent when the auxiliary member is attached, the distance between the auxiliary members is smaller in the central portion in the longitudinal direction than in the both end portions. By attaching so as to be, it is possible to prevent the adverse effect of the central portion. The cross section of the auxiliary member may be a semicircle, a trapezoid, a circle, a pipe (annular), a circle, or a shape lacking a part of the ring. Therefore, a general-purpose round bar-like member such as a reinforcing bar can be used as an auxiliary member as it is or after being appropriately processed, and can be obtained at a low cost.

  In particular, if the cross-section of the auxiliary member is a shape that lacks a part of a circular or annular semicircle or less, a portion where the auxiliary member is attached to the bottom surface of the support body is recessed from the periphery. Therefore, the recessed gap portion can be used as a welding allowance, and the welded portion can be stored in the gap. For this reason, even if the finish of the welded portion is somewhat rough, or the finish of the welded portion is not finished, it is possible to prevent a situation in which the welded portion protrudes from the outer surface of the auxiliary member and comes into contact with the lid receiving portion of the side groove. That is, if the welded portion protrudes from the auxiliary member and the shape of the convex surface formed by the auxiliary member changes, the shape of the portion protruded to the lower side of the support member changes, and the contact state of the side groove with the lid receiving portion Changes, which may cause rattling and noise, but by using an auxiliary member with a shape that lacks a part of a circular or annular semicircle or less, rattling and noise are caused by welding. Can be easily prevented.

  As described above, since a complicated shape can be realized by the auxiliary member side or the auxiliary member mounting method, the shape of the support body is simplified, and the change in the size of the support member to compensate for the change in the thickness of the lid body is It becomes possible to adjust the size of the support body having a square cross section. Therefore, a member such as a pipe having a simple square cross section can be used as the support body, and the auxiliary member can be obtained at a low cost, so that the manufacturing cost of the silencing lid can be greatly reduced.

  In particular, a lid for a side groove using a cylindrical shape, that is, a non-hollow round bar as an auxiliary member is excellent in various respects. First, in order to prevent rattling and the accompanying sound, the auxiliary member preferably has a shape that makes contact with the lid receiving portion of the side groove block constituting the side groove main body as much as possible with a point or a line. Therefore, the silencing effect is higher when the radius or diameter of the auxiliary member is as small as possible. However, even if a small-diameter portion is made of concrete, it is easily chipped and the strength is insufficient. Even if it is a metal, in the member which shape | molded the hollow or the plate, intensity | strength is insufficient and a shape is not stabilized. In addition, as described above, in the member in which the plate is formed, the processing of the welding beat for connecting to the support body is problematic.

  In this respect, if it is a metal rod-like member that lacks a part of the cross section of the round bar or the round bar so that the contact surface with the support body is slightly flat, the strength against the diameter is not hollow. Since it is high and does not chip, the shape is stable, and a small diameter suitable for silencing can be adopted. Furthermore, since a welding allowance can be made between the support body if it is a round bar, the welding beat should not protrude outside the rod-shaped member and the welding beat should not contact the lid receiving part. Is easy.

  Furthermore, it is desirable to attach the rod-like member to the support body so that the distance between the auxiliary members extending in the longitudinal direction becomes a bow so that the center is narrowed by about several mm with respect to the end, but the small-diameter rod-like member If so, a desired shape can be realized by positioning in an appropriate shape when welding to the support body without being bent by a press or the like in advance. When making a bend of about several millimeters by pressing, it is necessary to consider bending back called spring back, and it is difficult to process with high accuracy. On the other hand, in the case of a manufacturing method in which a round bar is bent and attached to the support body, the distance between the rod-like members is compared with the both end portions in the longitudinal direction in order to express a bending of about several mm. Using a jig (jig, guide, or presser) that is specified to be smaller, the worker can weld with the hand holding the round bar with the jig, thereby achieving a highly accurate shape. Therefore, an expensive processing machine such as a press is not required, and a gutter lid can be manufactured at a low cost.

  The round bar desirably has a diameter of about 5 to 20 mm. If the diameter is 5 mm or less, the shape of the round bar itself may be damaged by welding or plating. When the diameter exceeds 20 mm, it becomes difficult to realize a bow-like shape with a jig when welding. The diameter of the round bar is more preferably in the range of about 6 to 16 mm. This is because it is easy to weld and bend easily. The diameter of the round bar is most desirably around 10 mm, that is, in the range of about 9 to 13 mm.

  The side groove lid using this round bar as an auxiliary member can reduce the diameter of the portion of the opening that contacts the lid receiving portion, so that at least a part of the inside of the lid receiving portion is in contact with a part of the rod-like member. A high silencing effect can be obtained by combining with side grooves that are inclined to each other. The shape of the lid receiving portion is not limited to a flat outer surface and a slanted inner surface, but is slanted as a whole, slanted outside, or curved upward or convex. The silencing effect can be improved by using a small-diameter round bar as a member that contacts the lid receiving portion. In this case, there is a case where the rod-shaped member is not necessarily attached to the inside of the support portion main body, and is preferably attached to the outside of the support portion main body. The shape of the support portion main body is not limited to a rectangular shape, and may be any shape that is suitable for welding a rod-shaped member. For example, it may be a flat bar. It is also possible to provide a side groove lid with a high silencing effect by embedding the support body in the bottom surface of the concrete lid and welding a round bar as an auxiliary member. Furthermore, if the lid body covering at least a part of the opening of the side groove is made of metal, for example, grating, the back surface of the lid body is directly attached by welding or the like along the longitudinal direction of the side groove. Two rows of protrusions extending in the longitudinal direction can be formed.

  As described above, in the present invention, first, a support member having a substantially square cross section is attached to the back surface of the lid body, and the bottom surface of each support member is flat on the outside in the transverse direction and outside on the center or inside. A gutter lid protruding further downward is provided. When the lid for a side groove having this structure is installed in the opening of the side groove provided with a lid receiving portion whose inner surface is inclined toward the internal flow path, the protruding portion of the bottom surface becomes the slope of the lid receiving portion. Since it is in contact, it can prevent rattling and noise. Furthermore, the lid does not turn when the outer flat surface of the bottom surface of the lid and the outer flat surface of the lid receiving part that is in contact with it, it is safe, and the tolerance between the lid and the opening is sufficiently secured. it can.

  And such a lid for a side groove is an auxiliary member that forms a protruding portion by attaching the support member to the square pipe-shaped support portion main body having a square cross section and the bottom surface thereof, for example, an auxiliary member in the form of a round bar such as a reinforcing bar. It is possible to manufacture by combining with a member. By configuring the protruding portion with an auxiliary member extending in the longitudinal direction, it becomes possible to form a protruding portion on the bottom surface with a central portion in the longitudinal direction recessed inwardly from both end portions, and a side groove block Even if there is some warping or distortion of the lid, it is possible to prevent the end of the bottom surface of the lid from being lifted, and it is possible to provide a lid and a side groove for side grooves that do not generate rattling or noise reliably.

  Furthermore, the present invention provides a gutter lid characterized by using a round bar as an auxiliary member in contact with the lid receiver. By using the round bar, the diameter of the portion protruding so as to come into contact with the lid receiver can be reduced without difficulty, and a higher effect can be obtained for preventing rattling.

  FIG. 1 shows a cross section of a side groove to which the present invention is applied. As shown in a cross section in FIG. 1A, the side groove 1 is called a free-gradient side groove in which the bottom groove 3 is open in the bottom direction 3 and invert concrete is cast on site to construct the bottom portion 4. Is. As shown in FIG. 1B, the upper wall 6 is formed on both ends in the longitudinal direction X, and an opening 21 is formed in the center. Therefore, when constructing the side groove 1, the foundation concrete 9 is formed after excavating the ground 8, and the side groove blocks 20 are arranged in the flow direction thereon to form a water channel (flow path). Then, the opening 21 of the side groove block 20 is covered.

  In many cases, a lid 19 made of concrete is used as the lid. However, in order to increase the efficiency of rainwater drainage, a grating lid 10 in which a metal bearing bar (strip bar or flat bar) 11 and a cross bar 12 are combined vertically and horizontally to form a porous shape is often used. The grating lid 10 made of weatherable metals such as galvanized steel, stainless steel, and aluminum has a higher manufacturing cost than a concrete lid, so it is rarely installed in all the openings 21. Then, it is installed in the opening 21 with an appropriate interval in combination with the concrete lid. Further, the grating lid 10 has a higher strength than the concrete lid 19 and the lid body 13 may have a small thickness. However, since the manufacturing cost varies depending on the thickness of the lid main body 13, the thin grating lid 10 of the lid main body 13 is employed in a place where the load condition is low. Also, the thinner the lid, the easier it is to open and close, and there is also an advantage that maintenance is easy. Accordingly, the grating lid 10 is supplied in small amounts with different thicknesses of the lid body 13 depending on the conditions of the side grooves at the construction site, for example, for sidewalks and roadways, and also for roadways where the design load is high. .

  On the other hand, in the side groove block 20, the opening 21 is designed so that the concrete lid 19 or the grating lid 10 can be installed without distinction. As described above, since the concrete lid 19 has a lower strength, the lid becomes thicker. Accordingly, the height (depth) of the lid receiving portion (lid support portion) 22 is determined in accordance with the thickness of the concrete lid 19. In the grating lid 10, the lid body 13 is thinner than the concrete lid 19, The support member 14 is attached so as to be parallel to the back surface (bottom surface) 13b of the lid body 13, and the level of the surface 13a of the lid is adjusted.

  FIG. 2 shows a state in which the grating lid 10 of this example is viewed from the bottom surface 13b, and FIG. 3 shows an enlarged cross section of the support member 14 for raising. Each support member 14 is made of a highly weatherable metal like the lid main body 13 and is a hollow pipe having a substantially square cross section and extending in the longitudinal direction X. The longitudinal direction X of the side groove 1 or the side groove block 20 is Is attached to the back surface 13b of the lid main body 13 so as to be parallel to each other. Therefore, although the bottom surface 15 of the support member 14 is substantially flat, in this example, the outer side of the bottom surface 15 in the transverse direction Y (direction perpendicular to the longitudinal direction X) is the flat surface 16 and the center or inner side is below the outer surface 16. It has a protruding structure. Furthermore, the lid receiving portion 22 of the opening 21 of the side groove block 20 has a flat outer surface 23 and an inner surface 24 in contact with the outside of the protrusion 17 on the bottom surface 15 of the support member 14. The structure is inclined toward 25.

  Accordingly, when the grating lid 10 is installed in the opening 21 of the side groove block 20, the outer surface of the protrusion 17 protruding so as to form a part of the arc downward from the bottom surface 15 of the support member 14 is the lid receiving portion 22. The lid 10 is supported by the lid receiving portion 22 of the opening 21 in contact with the inwardly inclined surface 24. Then, the protrusion 17 of the lid 10 is pushed inward by sliding on the slope 24 of the lid receiving portion 22 by its own weight or a load applied from above, and the outer surface of the protrusion 17 protruding in an arc shape and the lid receiving portion 22. The surface 24 linearly inclined inside is in contact with any point P. Therefore, the lid 10 and the lid receiving portion 22 are in contact with each other, but the contacting portion P is almost a point in the cross-sectional direction, and further, the support member in the longitudinal direction X by the lid 10 being pushed in. 14, the lid 10 is supported in a state in which the projection 17 on the lid side and the slope 24 on the lid receiving side of the side groove block are in contact with each other in a substantially linear shape. For this reason, since the portion where the lid 10 and the lid receiving portion 22 of the side groove block 20 are in contact with each other is very small, the lid 10 is stably supported. There is almost no outbreak.

  Furthermore, in the side groove lid 10 of this example, the outer side 16 of the bottom surface 15 of the support member 14 is a flat portion and faces the flat portion 23 outside the lid receiving portion 22. Therefore, when the lid 10 is tilted when installed in the opening 21 or when the lid 10 is turned and tilted when a load is applied on a vehicle or the like, the flat surface 16 outside the bottom surface 15 of the support member 14 is It does not turn in contact with the flat surface 23 outside the receiving portion 22. The amount of the protrusion 17 protruding from the bottom surface 15 is about 5 mm to about 10 mm. With the protrusion 17 having such a height, the protrusion 17 is inclined 24 even if there is a manufacturing tolerance of 2 to 3 mm. Further, a clearance 29 of about several millimeters can be provided between the outer surfaces 16 and 23. Further, since the support member 14 is a raised member or a clogging material that absorbs the change in the thickness of the lid main body 13, the position of the bottom surface 15 of the support member 14 is not affected by the thickness of the lid main body 13, and the lid is close to the lid receiving portion 22. The position is away from the receiving part 22 by a substantially constant distance. For this reason, the clearance 29 between the flat surface 16 outside the bottom surface 15 of the support member 14 and the flat portion 23 of the lid receiving portion 22 exists reliably, but the distance does not increase.

  Therefore, when the lid 10 is installed in a substantially horizontal posture, the protrusion 17 on the bottom surface 15 of the support member of the lid 10 and the inclined surface 24 of the lid receiving portion 22 are in contact with each other at a point (line) to generate rattling and noise. Is prevented. At the same time, if the lid 10 is moved by several mm even when an eccentric load or the like is applied, the flat surface 16 on the outer side of the bottom surface 15 and the flat surface 23 of the lid receiving portion 22 are in contact with each other to further rotate. Absent.

  Therefore, even if the lid 10 of this example is swiveled, the swivelable range is within the clearance of about several millimeters or the gap 29, and the tilt of the lid 10 hardly occurs, and the lid 10 swivels. Even if the corner 13c of the surface 13a of the lid main body 13 protrudes from the surface of the side groove 1, the amount does not exceed several millimeters. For this reason, there is no fear that the wheel will ride on the protruding corner 13c and a large load is applied in the opposite direction to turn in the reverse direction or the grating lid 10 is flipped up. Therefore, the lid 10 of this example can not only prevent the generation of noise, but also the amount of turning of the lid 10 is small and stable, and there is no risk of being flipped up.

  Furthermore, the lid 10 of this example serves as a stopper when the bottom surface 15 of the support member 14 and the top surface 23 of the lid receiving portion 22 come into contact with each other, and prevents turning. These downward and upward planes 15 and 23 are portions that may not be rubbed when the lid 10 is attached and detached, and do not adversely affect the attachment and detachment of the lid 10. For example, a protrusion for preventing turning can be provided on the side surface of the lid body 13 to interfere with the inner surface of the opening 21 to stop the turning of the lid. However, since the size of the opening 21 includes a tolerance, the turning amount If it is going to be made smaller, it is expected that the stopper projection cannot interfere with the inner surface of the opening and the lid cannot be removed. On the other hand, if sufficient tolerance is ensured, the amount of turning until the vehicle stops is increased, and if the turning range becomes large, a situation where the lid falls into the side groove when turning is expected. On the other hand, with the lid 10 of this example, the lid can be prevented from turning at a portion that does not affect the tolerance when the lid is attached / detached, so that the attachment / detachment can be performed smoothly and an eccentric load is applied. When turning, the amount of turning can also be reduced.

  The support member 14 having a substantially square cross-sectional shape having a portion 17 protruding from the bottom surface 15 can be formed by drawing or the like, and has mass productivity. However, since the thickness of the lid main body 13 changes depending on the load condition, if the level of the surface 13a of the lid main body 13 is adjusted to the surface of the side groove 1, a support member 14 having a different height is required. If a part of the support member 14 protruding is to be molded, a separate mold frame is required for each size. Therefore, if the support member 14 having the above configuration is applied to various types of grating lids having different thicknesses, the initial investment increases.

  FIG. 4 shows an example of different side grooves of the present invention. The side groove 1 a is formed by embedding a side groove block 26, which has a U-shaped cross section and has a bottom surface, and has an opening 21 along the longitudinal direction X in the ground 8. The cross-sectional shape of the lid receiving portion 22 is the same as that of the above-mentioned side groove, and the outside is a flat surface 23 and the inside is a slope 24 inclined downward toward the water channel 25. Also in the side groove 1a using such a U-shaped side groove block 26, it is desirable to install a grating lid continuously or at an appropriate interval in order to improve drainage inflow efficiency.

  FIG. 5 shows the configuration of the back surface 13b of the grating lid 30a of this example, and FIG. 6 shows the configuration of the support member 14 in an enlarged cross section. The support member 14 of this example is constituted by a square pipe 31 having a square cross section and an auxiliary member 35 attached to the approximate center of the bottom surface 15 by welding or the like. Two square pipe-shaped support portion bodies 31 are attached to the back surface 13 b of the lid body 13 in parallel to the longitudinal direction X of the side groove block 26, and support the lid body 13 b with respect to the lid receiving portion 22. At the same time, it functions as a raising member that absorbs changes in the thickness of the lid body 13. The auxiliary member 35 has a shape obtained by cutting a part of a cylinder along the axial direction, and is attached only to the vicinity of both end portions 32 in the longitudinal direction X of the support portion main body 31 in the shape of a square pipe. A portion 17 projecting downward is formed in the center of the bottom surface 15 of 14. On the other hand, in the lid 30a of this example, no auxiliary member is attached to the central portion 33 in the longitudinal direction X of the support portion main body 31, and no protruding portion is formed.

  The support member 14 includes a square pipe-shaped support portion main body 31 and an auxiliary member 35 constituting the protrusion 17. Since the square pipe used as the support body 31 is available in various sizes, it is easy to purchase a square pipe of a size that fits the thickness of the lid main body 13. Can be handled at low cost. And since the projection part 17 can be formed in the bottom face 15 by attaching the auxiliary member 35 of the shape which cut | disconnected the cylinder by welding etc., it is a grating lid of various thickness and can provide a silencing type lid | cover at low cost.

  Furthermore, in the silence type lid of the type in which a part of the bottom surface 15 protrudes and the protruding part 17 comes into contact with the inclined surface 24 of the lid receiving part 22, a part in the longitudinal direction X hits and other parts If it is not hit, it will turn by a minute amount in the longitudinal direction X and a sound will be generated. When the lid 30a is considered, as long as the end portions 32 are in contact with each other, no turning occurs in the longitudinal direction X even if the central portion 33 is floating. On the contrary, if the central portion 33 is in contact and one of the end portions 32 is in a floating state, it turns in the longitudinal direction X and causes noise and rattling. Further, the same applies to the case of a free-gradient side groove, but the side groove block 26 as a whole is often high in the center in the longitudinal direction X and low in both ends and is distorted. This means that there are many opportunities to lift the central part when transporting or storing the formwork for forming the side groove block, and also in the manufactured side groove block, when transporting or storing it. It is thought that there are many opportunities to lift the center part when doing. Therefore, also in the lid 30a, when the protrusions 17 are formed so as to have the same height simply parallel to the longitudinal direction X, the central portion 33 is in contact with the inclined surface 24 of the lid receiving portion 22, and one of the end portions 32 is There is a possibility of floating. Therefore, in the lid 30a of this example, the auxiliary member 35 is not attached to the central portion 33 of the bottom surface 15 of the support member 14, so that the central portion 33 of the bottom surface 15 of the lid 30 does not contact the lid receiving portion 22. . Thereby, rattling and generation of noise can be prevented more reliably.

  Further, in the support member 14 of this example, since the protrusion 17 is formed by attaching the auxiliary member 35 to the support body 31, the both end portions 32 of the bottom surface 15 are limited by limiting the range in which the auxiliary member 35 is attached. It is very easy to form the portion 17 that protrudes only. In addition, even in the range where the auxiliary member 35 is attached, the attachment position in the longitudinal direction X of the auxiliary member 35 is set so that both ends in the longitudinal direction X spread outward in units of mm or less, or the size of the auxiliary member 35 is mm. Alternatively, by making both ends in the longitudinal direction X larger in units smaller than that, the both ends in the longitudinal direction X of the protruding portion 17 are reliably brought into contact with the inclined surface 24 of the lid receiving portion 22, and rattling and noise. Can be prevented more reliably.

  On the other hand, when the portion 17 that protrudes by bending the bottom surface 15 of the support member 14 as shown in FIG. 3 is formed, a plurality of complicated presses are required to form the portion 17 that protrudes only at both end portions 32. A process is required and the cost is high. Furthermore, changing the size of the protruding portion 17 in the longitudinal direction X in units of mm or less, or expanding the position of the protruding portion 17 to the outside is a difficult task and is a highly accurate product. Is difficult to manufacture with a high yield, and the manufacturing cost is high.

  In addition, leaf springs 50 are attached to the lid 30a of the present example at two locations on one side surface 13s of the lid body 13 in the transverse direction Y. The leaf spring 50 is formed by processing an iron plate that is slightly thinner than the flat bar that forms the side surface 13s of the lid body 13 so as to be slightly opened upward. The lower end 51 of the leaf spring 50 is welded to the side surface 13s, and the upper end 52 is formed. Is in contact with the inner surface 21a extending in the longitudinal direction X of the opening 21 of the side groove main body (side groove block) 20 with elasticity. For example, if the rib 13s on the side surface of the lid body 13 is composed of a flat bar of about 6 mm, the leaf spring 50 can be formed by processing a flat bar of the same or slightly thinner 4.5 mm or 3.2 mm. After welding to the main body 13, the zinc hot-dip plating including the leaf spring 50 can be performed integrally. By forming the leaf spring 50 using an iron plate having such a thickness, even when the tip 52 of the leaf spring 50 comes into contact with the inner side 21a of the opening 21 when the lid 30a is inserted into the opening 21, the leaf spring 50 bends. The possibility of scratching the inner surface 21a of the opening is small.

  In the lid 30a of the present example, the side bars of the side groove 13s along the lid receiving portion 22 of the side groove body opening 21 of the side bars constituting the side surface of the grating lid body hit the inner surface 21a of the opening 21. Two leaf springs 50 are provided on the front and rear sides, respectively. The leaf spring 50 is deformed and contracted when the lid 30a is installed in the opening 21, and does not hinder the installation. On the other hand, since the leaf spring 50 is formed so as to expand larger than the opening 21, when the lid 30a is installed in the opening 21, the leaf springs 50 on both sides are always in contact with the inner surface 21a, and the balance of the lid 30a The position (protrusion part) 17 projecting downward from the bottom surface 15 of the support member 14 is held at a position in contact with the inclined surface 24 of the lid receiving part 22 of the opening of the side groove. Accordingly, the lid 30a is attached to the opening in a state where there is no backlash. After the lid 30a is once attached to the opening 21, when the moderate load is applied to the lid 30a and the lid 30a is rotated by a small angle and the lid 30a is further stabilized, the leaf spring 50 is further slightly deformed. Thereafter, no rattling or noise occurs even if the weight is repeatedly applied.

  At this time, if a load is applied not only in the vertical direction but also in various directions, a force is generated that causes the lid 30a to move horizontally or rotate within the opening 21 or to rotate in the vertical direction. To do. Since the leaf spring 50 is always in contact with the inner surface 21a of the opening 21, it resists the movement of the lid 30a and prevents the lid 30a from moving. The position and posture of the lid 30a are held so as to come into contact with a line.

  If a load is applied to the lid, the lid will move to some extent within the opening if it simply prevents the side of the lid from hitting the inner surface of the side groove opening to generate noise or damage the inner surface of the opening. Since this is permitted, it is only necessary to sandwich an elastic body having a relatively low elastic coefficient such as rubber or a clip in the gap 59 between the lid and the opening. On the other hand, in a lid that makes contact with the inclined surface or curved surface of the lid receiving portion 22 at a point or line so that vibration and noise are hardly generated, noise is generated only by a slight deviation from the stable position of the lid. As a result, the desired performance cannot be obtained. In the case of the lid 30a of the present example, a plate material of about 4.5 mm, which is almost the same as or slightly thinner than the grating structural member, is attached to the side surface as the spring 50, so the spring constant of the spring 50 is high and easily Does not move the position of the lid 30a. Therefore, vibration and noise of the lid 30a can be prevented.

  Further, by using a metal leaf spring, the leaf spring 50 can be welded to the grating body 11 and then plated together. Therefore, it is possible to provide a highly reliable lid with high durability against the occurrence of rust. Further, in the side groove where the grating lid 30a is continuously attached, the angle at which each lid 30a turns is very small, and the surface 13a of the lid body 13 is merely inclined by about 1 to 3 mm. The slope is almost unknown. However, when the lid 30a is continuously attached, the difference in inclination becomes conspicuous. On the other hand, since the inclination of the lid can be relaxed by adopting the lid to which the leaf spring 50 is attached, the appearance is good.

  Furthermore, although a moderate load is applied to the lid 30a, the balance is maintained in the transverse direction Y (direction perpendicular to the longitudinal direction X) of the lid 30a. There is a possibility that 30a turns slightly. Even if there is no problem in itself, the contact surface may be rubbed and worn as the turn is repeated, and the shape of the contact surface may be lost, or the balance of the lid may be lost and noise may be generated. By attaching the leaf spring 50, such repeated turning can be prevented, so that noise and rattling can be further reliably prevented.

  In addition, when a metal leaf spring 50 welded to the lid 30a is used, there is no risk of deterioration due to ultraviolet rays such as rubber, and it is lost when the lid is repeatedly attached and detached like a clip. Nor. A clip made of a steel material of about 1 mm lacks the strength and cannot be attached to the lid by welding. A thin material is often deformed by galvanization, and may not function as a spring having a desired shape. It is also possible to weld the leaf spring 50 to the support portion main body 31 of the support member 14. However, the overall length of the leaf spring 50 becomes long and the spring constant tends to be low. Therefore, it is difficult to perform the function of holding the lid 30a at a desired position. Thickening the leaf spring 50 solves the long overall length. However, if the leaf spring has the same thickness as the gap 59 between the lid 30a and the opening 21, a tolerance problem occurs and the lid opens. 21 may be difficult to install. It is also conceivable to attach a stopper having no elasticity to the side bar 13s to hold the position of the lid inside the opening 21. However, it is necessary to provide a certain gap between the stopper and the inner surface 21a of the opening 21 so as not to become an obstacle when the lid is attached to and detached from the opening 21. If such a gap exists, the position of the lid is required. Cannot be maintained with high accuracy. That is, if the rigid stopper is too large, the lid cannot be fitted into the opening, and if the rigid stopper is forcibly fitted, the inner surface will be damaged, and the rattling of the lid will increase. On the other hand, if a clearance is anticipated between the rigid stopper and the inner surface of the opening, it will rattle the lid.

  FIG. 7 is an enlarged view of the vicinity of the support member 14 of still another silencing type grating lid according to the present invention. The support member 14 of the lid 30b of this example forms a protrusion 17 by attaching a round bar as an auxiliary member 36 slightly inside the center of the bottom surface 15 of the square pipe-shaped support portion main body 31. Further, as described above, when the belt-like auxiliary member 36 having the same cross section is linearly welded to the square pipe 31, the middle portion comes into contact with the inclined portion 24 of the lid receiving portion 22 of the side groove block. Therefore, as shown in FIG. 8, the auxiliary member 36 is welded so that the mutual distance L2 of the intermediate portion (center portion) 38 in the longitudinal direction X is smaller than the mutual distance L1 of both ends 37. By attaching the auxiliary member 36 in a bow shape in this way, the shape of the auxiliary member does not need to be squeezed in advance or formed into a bow shape by a press or the like, and the cost can be reduced.

  The rod-like auxiliary member 36 for forming the band-like protrusions on the bottom surface 15 of the support member 14 is sufficient to have a diameter of about 9 to 13 mm and has a small cross-sectional area, so that it can be bent easily. Further, the difference between the distance L2 of the intermediate portion 38 and the distance L1 of both ends 37 may be in mm units, for example, about 3 mm. Accordingly, the both ends 37 of the rod-shaped auxiliary member 36 and the intermediate portion (center portion) 38 are welded while being supported by a gap or a distance adjusting jig, thereby being curved or arcuate to a desired extent. The projection 17 can be easily formed. As a jig for adjusting a gap or a distance, there is a jig provided with two notches into which a bar-shaped auxiliary member 36 is fitted at a desired distance on one side of a plate material. For example, both ends 37 of the rod-like auxiliary member 36 are welded to a predetermined position in the center or inside of the bottom surface 15 using a jig that secures the distance L1, and then the intermediate portion 38 is cured to secure the distance L2. By welding in a pressed state using a tool, it is possible to form a protrusion 17 that is curved in an arcuate shape in the longitudinal direction X. In order to bend the belt-like auxiliary member 36 more simply, a method of making a cut in the intermediate portion 38 of the belt-like auxiliary member 36 is also effective.

  Further, in the case of the rod-like auxiliary member 36, the member 36 having a circular cross section is attached to the flat bottom surface 15. Therefore, a triangular gap 36g is formed between the bottom surface 15 and the member 36, and the gap 36g is welded as a welding allowance. It can be used as an area for overlaying. And since the part does not hit the slope 24 of the lid | cover receiving part 22, the process after welding becomes very easy, and the post process of a welding part is unnecessary depending on the case. If there is a possibility that the welded part hits the inclined surface 24 when the auxiliary member is attached to the bottom surface 15, if that part protrudes from the surroundings, it becomes a fulcrum, and rattling occurs and the silencing effect is lost. . Therefore, it is necessary to limit the amount of welding overlay or to carefully finish using a grinder. However, the rod-like auxiliary member 36 as in this example does not have to worry about the portion hitting the inclined surface 24 even if the amount of overlay is increased in order to firmly weld, and furthermore, finishing work by a grinder or the like is unnecessary. Become. A candidate for such a rod-like auxiliary member 36 is to use a reinforcing bar. Reinforcing bars are extremely mass-produced products and are extremely inexpensive. And if it attaches so that it may curve, it is not necessary to change the cross-sectional shape of an auxiliary member by the longitudinal direction X, and it only cuts to desired length.

  A bar-shaped auxiliary member 36 such as a reinforcing bar may be cut short and attached to both end sides 32 of the support body 31 as shown in FIG. If it does in this way, the material cost of an auxiliary member will become still cheaper. However, when the protrusion 17 is partially formed in the longitudinal direction X, a concentrated load is applied to the protrusion 17 having a short length. Therefore, the protrusion 17 is easily broken or broken in the inclined surface 24 of the lid receiving portion 22 that receives it, which causes a rattling and noise. In order to prevent such a situation, it is desirable to secure the length of the protrusion 17 at least 5 cm.

  FIG. 9A and FIG. 9B show an example of yet another silencing type grating lid according to the present invention in an enlarged manner in the vicinity of the support member 14. The support member 14 of the lid 30c of the present example is configured such that an auxiliary member 41 having a shape obtained by shaving a part of a round bar such as a reinforcing bar is attached to a substantially center of the bottom surface 15 of the square pipe-shaped support body 31. Forming. The larger the diameter of the round bar used as the auxiliary member, the higher the strength. However, if the diameter is too large, there is a possibility of contact with a portion other than the inclined surface 24 of the lid receiving portion 22, and a situation may occur in which the outer surface of the protruding portion 17 does not contact the inclined surface 24. In the example shown in FIG. 9, the lid receiving portion 22 is further formed with a flat surface 27 on the inner side of the inclined surface 24. However, when the diameter of the auxiliary member 41 is increased, the flat surface 27 comes into contact with the inclined surface 24. The possibility comes out. In such a case, it is necessary to trim the round bar along the axial direction and adjust the height of the projection 17 formed thereby. The rod-shaped member serving as the auxiliary member is not limited to a non-hollow columnar member, and may be a member having a circular cross section with a hollow inside, and a cylindrical member as a whole. It is possible to adjust the height by changing the shape with a press or the like.

  Even if the cross-section of the auxiliary member is not a complete circular or annular member, as in the auxiliary member 41 of this example, if the cross-section is a shape lacking a part of a semicircle or less of the circular or annular member, A portion 41g where the auxiliary member 41 is attached to the bottom surface 15 of the support portion main body 31 is recessed from the periphery. Therefore, the recessed gap 41g can be used as a welding allowance, and the welded portion can be stored in the gap. For this reason, in the same manner as described above, even if the finish of the welded portion is somewhat rough or the finish of the welded portion is not finished, the situation where the welded portion protrudes from the outer surface of the auxiliary member 41 and contacts the lid receiving portion 22 of the side groove. Can be prevented. For this reason, it is possible to easily prevent rattling and noise due to welding of the auxiliary member.

  Further, in the lid 30 c of this example, a part of the side bar 13 s of the lid body 13 is cut and raised to form the leaf spring 50. That is, the side bar 13 is cut into a downward U-shape to form a gap 54, and the inner part thereof is raised outward like a claw to form a leaf spring 50. In the lid 30c, the upper end 52 of the leaf spring 50 always hits the inner surface 21a of the opening 21, and the lid 30c can be held in a stable position. By cutting and raising the side bar 13s to form the leaf spring 50, the leaf spring 50 has the same plate thickness as the side bar 13s, that is, about 4.5 to 6 mm, and the leaf spring 50 having an appropriate elastic coefficient is covered. It can be formed on both edges of the body 13. Further, since the leaf spring 50 can be formed by slightly deforming after pressing a part of the side bar 13s, welding is unnecessary and the manufacturing cost is reduced.

  FIG. 10A and FIG. 10B show an example of still another silencer type grating lid according to the present invention in the vicinity of the support member 14 in an enlarged manner. The support member 14 of the lid 30d in this example is formed by pressing a metal plate to include a protrusion 17 and a part of the flat portion 16. When making the strip | belt-shaped auxiliary member 42 using an iron plate, it is necessary to cut | disconnect the width | variety and length of an iron plate. When cutting the width, the cutting surface is large, shearing or laser cutting is required, and there is a possibility that the end material may come out, so there is a loss compared to the case of using a rod-shaped member such as a reinforcing bar. However, the shape of the auxiliary member for forming the protrusion 17 is free, and a belt-like auxiliary member having a shape that lowers the intermediate portion 33 is pressed, or the width of the intermediate portion 33 is reduced. These auxiliary members can be formed, a belt-shaped auxiliary member having a low intermediate portion 33 and a narrow width can be formed, or a belt-shaped auxiliary member bent in a bow shape can be formed.

  And, instead of changing the shape of the square pipe 31 of the support portion main body, it is only necessary to change the shape of another plate-like member 42 with a small cross section attached to the bottom surface 15, so that processing is easy. Cost is also cheap. If the plate-like auxiliary member 42 as shown in FIG. 10A is processed, it can be manufactured by a press molding machine having a small tonnage.

  As described above, according to the present invention, for economic reasons, in the side groove lid such as a grating lid having different thicknesses under load conditions, the large support member 14 itself for height adjustment is not integrally processed. The support member 14 is divided into a support body 31 that can be easily adjusted in height and can be obtained at low cost, and small auxiliary members 35, 36, 41, and 42 that are easy to process and suitable for forming the projections 17. To do. In the case of a metal lid, the support main body and the auxiliary member can be easily and firmly fixed to the lid main body 13 by welding, so that it is possible to provide an inexpensive silencing type gratin lid. It becomes.

  Further, in the lid 30d of this example, a part of the side bar 13s of the lid body 13 is pressed upward in a U shape, and the inside thereof is raised to form the leaf spring 50. In the lid 30d, the lower end 51 of the leaf spring 50 always hits the inner surface 21a of the opening 21, and the lid 30d can be maintained in an ideal position for noise prevention. The direction of the leaf spring 50 may be upward or downward as described above. If the upper end 52 is in contact with the shape, the resistance when the lid is fitted into the opening is small. On the other hand, if it is the shape which the lower end 51 contacts, there will be little resistance when removing a cover from opening. In the case where a plurality of leaf springs 50 are provided on the side bar 13s, it is also effective to provide upward and downward leaf springs 50 so that both can be easily attached and detached. That is, the side bar 13 is cut into a downward U-shape to form a gap 54, and the inner part thereof is raised outward like a claw to form a leaf spring 50. In the lid 30c, the upper end 52 of the leaf spring 50 always hits the inner surface 21a of the opening 21, and the lid 30c can be held in a stable position. By cutting and raising the side bar 13s to form the leaf spring 50, the leaf spring 50 has the same plate thickness as the side bar 13s, that is, about 4.5 to 6 mm, and the leaf spring 50 having an appropriate elastic coefficient is covered. It can be formed on both edges of the body 13. Further, since the leaf spring 50 can be formed by slightly deforming after pressing a part of the side bar 13s, welding is unnecessary and the manufacturing cost is reduced.

  As described above, the method of always pressing the inner surface or the inner wall of the opening of the side groove by welding to the side bar 13s of the lid body 13 or by cutting out a part of the side bar and bending it to the outside has a structure for noise reduction. Suitable as a side groove cover. The side groove lid for silencing measures is such that a part of the bottom surface or side surface of the lid is in contact with the lid receiving portion by a point or a line, and at least one of the lid receiving portion or the bottom surface of the lid is an inclined surface or a curved surface. It has become. Therefore, the lid and the lid receiving portion are in contact with each other in a somewhat unstable state as compared with a conventional side groove lid in which a flat lid receiving portion is placed on a flat lid receiving portion. And if it rotates left and right more than a certain amount or shifts laterally, it theoretically shifts from the position where the silencing effect can be obtained, which causes noise. By projecting leaf springs 50 having appropriate spring constants on both sides of the lid main body 13, such a situation can be prevented.

  In the above description, the lid support member 14 has the portion 17 protruding so as to bend downward from the bottom surface 15, and the lid receiving portion 22 is based on the combination having the substantially straight slope 24. Although described, the combination of the silencer side groove block and the lid is not limited to this. As shown in FIG. 11A, a combination of the support member 14 on the bottom surface 15 having a portion 17 protruding so as to be curved downward and the lid receiving portion 22 having a surface 28 inclined so as to be curved upward may be used. Further, as shown in FIG. 11B, a lid receiving portion having a support member 14 on the bottom surface 15 having a portion 18 protruding downwardly in a trapezoidal shape or a triangular shape, and a surface 28 inclined so as to be curved upward. A combination of 22 may be used.

  Hereinafter, some examples in which rod-like auxiliary members are attached will be described. The grating lid 30 e shown in FIG. 12 uses a metal round bar as the auxiliary member 36, and the bar-like member 36 is attached to the innermost side of the bottom surface 15 of the square pipe-like support portion main body 31. By attaching the round bar 36 to this position, a large area of the lid-side flat surface 16 facing the flat surface 23 of the lid receiving portion 22 can be secured. Therefore, the safety when the lid 30e rotates with an excessive load is further increased. Further, since the lid receiving portion 22 may be formed on the limited inner portion of the inclined surface 24 in contact with the round bar 36, many flat portions 23 of the conventional lid receiving portion can be left and the strength can be increased. strong. Further, when the slope 24 is formed by modifying the lid receiving portion of the conventional side groove block, the portion to be modified can be reduced.

  The lid 39 supported in FIG. 13 is basically a concrete lid provided with a concrete lid body 39a. A metal support portion main body 31a constituting a flat surface such as a flat bar is embedded in both edges of the back surface 39b of the cover main body 39a facing the cover receiving portion 22, and the support portion main body 31a. The bar-shaped member 36 is welded to the projection 17 to form the projection 17. The structure of the support member 14 provided with the support part main body and the rod-shaped member described above is not limited to the grating lid, and can also be applied to a concrete lid. And when applying to a concrete lid, since raising is unnecessary, the support part main body 31a fulfill | performs the function which connects a metal rod-shaped member and the concrete lid main body 39a, as shown in FIG. It is desirable that the flat bar serving as the support body 31a is embedded horizontally in the bottom surface 39b. However, in the lid 39 of this example, since the rod-shaped member 36 is in contact with the inclined surface 24 of the lid receiving portion 22 to prevent rattling and noise, the embedding accuracy of the support portion main body 31a is not so high. May be. Instead of embedding the flat bar itself, it is also possible to employ a method in which an insert having a female screw formed therein is embedded in the lid main body 39a and the flat bar is screwed thereto. In any case, it is desirable that at least a part of the members constituting the support body to be joined to the concrete lid body 39a is embedded in the concrete lid body 39a.

  As the auxiliary member for supporting the concrete lid, the various shapes described above can be adopted. A suitable auxiliary member is a round bar 36 or a member 41 obtained by shaving a part of the round bar. Non-hollow metal rod-like members having these shapes have a higher strength with respect to the diameter than hollow ones and are not chipped. Accordingly, a contact area with the inclined surface 24 of the lid receiving portion 22 is small, and a small diameter suitable for silencing can be employed. Furthermore, as long as it is a round bar or a member obtained by shaving a round bar, a welding allowance can be made between the support portion main body, and as described above, it is easy to prevent the welding beat from protruding outside the auxiliary member. .

  Furthermore, since the diameter of the auxiliary member can be reduced, the auxiliary member is attached to the support body so that the distance between the auxiliary members extending in the longitudinal direction becomes a bow so that the center is narrowed by about several mm with respect to the end. It becomes easy. FIG. 14 shows an example of a jig 60 suitable for attaching the rod-shaped auxiliary member 36 to the support body 31. As described with reference to FIG. 8, the mutual distance L2 of the intermediate portion (center portion) 38 in the longitudinal direction X of the auxiliary member 36 is bent inward so as to be smaller than the mutual distance L1 of both ends 37 by several mm. As a result of the welding, the shape of the auxiliary member does not have to be pre-squeezed or arched with a press or the like in advance, and the lid 30e and the like can be manufactured at a low cost. Controlling the bow of about several millimeters with a press or the like is quite difficult in consideration of phenomena such as springback, and is an operation that requires skill and is expensive.

  The jig 60 shown in FIG. 14 has a plate material 68 that holds the intermediate portion 38 of the rod-shaped auxiliary member 36 and plate materials 67 that hold the both ends 37, and these plate materials 67 and 68 are respectively separated by a rectangular frame 61. It is fixed so that it is in a position suitable for pressing. Further, each of the plate members 67 and 68 is formed with a recess 65 in which a part of the auxiliary member 36 can be fitted and fixed, and the interval between the recesses 65 of the plate material 67 is set to a mutual distance L1 between both ends 37. The interval between the 68 recesses 65 is set to the distance L2 between the intermediate portions (center portion) 38. Therefore, the auxiliary member 36 can be guided by the jig 60 so as to have a desired shape, and the auxiliary member 36 can be pressed against the bottom surface 15 of the support body 31. The distances L1 and L2 can be controlled with high accuracy by welding the auxiliary member 36 with the jig 60 pressed. And since the auxiliary member 36 is fixed to the support part main body 31 by welding, a springback etc. do not generate | occur | produce and it is very easy to obtain the desired bow shape.

  Considering that the operator can press the round bar 36 with the jig 60 to adjust the shape without using a press or the like by hand, the diameter of the round bar 36 is preferably about 20 mm or less. Further, considering that there is a possibility that a part of the round bar melts and its shape is deformed when the round bar 36 is welded, the diameter of the round bar is preferably about 5 mm or more. Considering the ease of welding and the ease of adjusting the shape with the jig 60, the diameter of the round bar 36 is more preferably in the range of about 6 to 16 mm. It is possible to use a bar-shaped metal member that is commercially available for reinforcing bars and the like. For example, it is most desirable to use a member having a diameter of about 10 mm, that is, a range of about 9 to 13 mm.

  As described above, the diameter of the protrusion 17 can be reduced by using a round bar or an auxiliary member having a part thereof omitted, so that the portion 17 protruding from the back surface of the lid and the slope of the lid receiving portion 22 can be obtained. The area in contact with can be reduced. Therefore, the configuration of the support member 14 using the round bar 36 is also suitable for other various shapes of lid receivers known for vibration or noise prevention. The grating lid 30 f shown in FIG. 15 is suitable for the opening 21 of the side groove block 71 in which the inner surface 72 of the lid receiving portion 22 is curved in a concave shape as a whole, and the bottom surface 15 follows the shape of the lid receiving portion 22. A round bar-like auxiliary member 36 is attached to the curved support portion body 31b. The grating lid 30g shown in FIG. 16 is suitable for the opening 21 of the side groove block 73 in which the inner surface 74 of the lid receiving portion 22 is curved in a generally convex shape, and is formed on the bottom surface 15 of the rectangular support portion main body 31. A round bar-shaped auxiliary member 36 is attached to the outside. Further, the grating lid 30h shown in FIG. 17 is suitable for the opening 21 of the side groove block 75 in which the inner surface 76 of the lid receiving portion 22 is uniformly inclined, and substantially along the outer edge of the bottom surface 13b of the lid body 13. The rod-shaped member 36 is directly attached by welding to form the projection 17. In either case, since the diameter of the protrusion 17 can be reduced, it becomes easy to contact the inner surface 72 or 74 of the lid receiving portion 22 with a point or a line, and the effect of suppressing the rattling and noise of the lid is high.

FIG. 1A is a cross-sectional view showing a schematic structure of a side groove in a state in which the side groove cover of the present invention is installed, and FIG. 1B is a plan view of the side groove as viewed from above. It is a reverse view of the cover for side grooves shown in FIG. It is sectional drawing which expands and shows the structure of the vicinity of the supporting member of the cover for side grooves shown in FIG. It is sectional drawing which shows the state which installed the lid | cover for different side grooves in a different side groove. It is a reverse view of the cover for side grooves shown in FIG. It is sectional drawing which expands and shows the structure of the vicinity of the supporting member of the cover for side grooves shown in FIG. It is sectional drawing which expands and shows the structure of the vicinity of the supporting member of the cover for different side grooves. It is a reverse view of the cover for side grooves shown in FIG. It is sectional drawing which expands and shows the structure of the supporting member of the cover for different side grooves, and its vicinity. Furthermore, it is a figure which expands and shows the structure of the support member of the cover for different side grooves, and its vicinity. Furthermore, it is sectional drawing which expands and shows the structure of the bottom face of the support member of the cover for different side grooves. Furthermore, it is a figure which expands and shows the structure of the support member of the cover for different side grooves, and its vicinity. Furthermore, it is a figure which expands and shows the structure of the support member of the cover for different side grooves, and its vicinity. It is a figure which shows the jig | tool suitable for guiding the shape of an auxiliary member. Furthermore, it is a figure which expands and shows the structure of the support member of the cover for different side grooves, and its vicinity. Furthermore, it is a figure which expands and shows the structure of the support member of the cover for different side grooves, and its vicinity. Furthermore, it is a figure which expands and shows the structure of the support member of the cover for different side grooves, and its vicinity.

Explanation of symbols

1 Side groove 10, 30a-30h, 39 Side groove cover 13 Cover body (Grating)
14 Support member 15 Bottom surface 16 of support member Flat portion 17 outside the bottom surface of support member Portion 18 projecting so as to protrude below the center or inside of the bottom surface of support member 18 Below the center or inside of the bottom surface of support member A portion protruding in a trapezoidal shape 19 Concrete lid 20, 26 Side groove block 21 Opening 22 Lid receiving portion (lid supporting portion)
23 Flat portion outside the lid receiving portion 24 Inclined portion 31 inside the lid receiving portion Square pipe-like members 35, 36, 41, 42 of the main body of the supporting member Auxiliary components constituting the protruding portion of the bottom surface of the supporting member Element

Claims (14)

A metal lid body covering at least a part of the opening of the side groove;
Two support members having a substantially square cross section attached so as to be parallel to the back surface of the lid main body along the longitudinal direction of the side groove ,
A leaf spring protruding from at least one side surface in the transverse direction of the lid body so as to hit the inner wall of the opening of the side groove ;
Wherein at least said longitudinal bottom surface near both ends of the support member, outside the plane of the transverse, central or inner protrudes downward from the outer,
The leaf spring is a lid for a side groove formed by cutting and raising a part of a side bar on the side surface in the transverse direction of the lid body . According to claim 1, wherein the plate spring, lid for groove from both sides of the said transverse direction of the cover body protrudes to strike the inner wall of the opening of the groove. The support member according to claim 1 or 2 , wherein the support member has a rectangular cross section.
A gutter lid provided with an auxiliary member that is attached to the center or inside of the bottom surface of the support portion main body and constitutes a protruding portion extending in the longitudinal direction. The lid for a side groove according to claim 3 , wherein the auxiliary member is attached except for a central portion in the longitudinal direction of the support body. 4. The lid for a side groove according to claim 3 , wherein the auxiliary member has a protruding portion that is smaller in the center portion in the longitudinal direction than the both end portions or has a narrow width in the transverse direction. 6. The side groove cover according to claim 3 , wherein the auxiliary member is attached such that a distance between the auxiliary members is smaller in a central portion in the longitudinal direction than in both end portions. The lid for a side groove according to any one of claims 3 to 6 , wherein the auxiliary member has a semicircular, trapezoidal, circular, annular, or circular shape or a part lacking an annular shape. A lid for a side groove according to any one of claims 1 to 7 ,
A side groove having a side groove block with an opening to which the side groove lid is attached,
The side groove which inclines so that the inner side of the lid receiving part of the opening of the side groove block may be in contact with the outer side of the portion protruding to the lower side of the bottom surface of the support member. 9. The side groove according to claim 8 , wherein the side groove block is a U-shaped side groove having a substantially U-shaped cross section and a bottom surface, or a free-gradient side groove having an upper wall and having a bottom surface constructed on site. A metal lid body covering at least a part of the opening of the side groove;
Have a leaf spring which projects to strike the inner wall of the opening of the groove from at least one side of the transverse direction of the lid body,
The leaf spring is a lid for a side groove formed by cutting and raising a part of a side bar on the side surface in the transverse direction of the lid body . The lid for a side groove according to claim 10 , wherein the leaf spring protrudes from both side surfaces of the lid body in the transverse direction. The lid for a side groove according to claim 10 or 11 , wherein the leaf spring has the same thickness as a plate material constituting the lid body. The lid for a side groove according to any one of claims 10 to 12 , wherein the lid body contacts the lid receiving portion of the opening of the side groove at a point or a line. A gutter lid according to any of claims 10 to 13 ,
A side groove having a side groove block having an opening to which the side groove cover is attached.

Images