JP4338616B2 - Structure and support structure - Google Patents

Description

  The present invention relates to a structure such as a building or civil engineering and a support structure, and in particular, includes a pair of columnar or wall-shaped members spaced apart by a predetermined distance and a member that is bridged over the pair of members. The present invention relates to a structure and a support structure.

  2. Description of the Related Art Conventionally, a structure including a pair of columnar or wall-shaped first members that are separated by a predetermined distance and a second member that is bridged over the pair of first members is known. Examples of the structure include a gutter, a waterway, an underground structure, and a bridge.

  FIG. 5A shows a cross section of a conventional side groove as a structure. The side groove 100 connects a pair of side wall portions 101 spaced apart from each other by a predetermined distance and a lower end of the side wall portion 101. A side groove main body 103 having a bottom 102 and a lid 104 placed on the upper ends of a pair of side wall portions 101 in the side groove main body 103 are configured. A lid receiving portion 107 having a vertical surface 105 and a horizontal surface 106 is formed on the upper end of the side wall portion 101 of the gutter body 103 so as to face each other. A lid 104 is formed on the horizontal surface 106 of the pair of lid receiving portions 107. The lid 104 is supported on the side groove main body 103 by contacting the bottom surface of.

  By the way, in the above-mentioned side groove 100, the lid 104 is supported by the horizontal surface 106 of the side groove main body 103, and dirt or pebbles are easily collected on the horizontal surface 106. There was a problem that the lid 104 could not be stably supported by the receiving portion 107 and rattling noise was generated when a person or a vehicle passed over the lid 104.

  Therefore, a side groove 110 as shown in FIG. 5B has been proposed. In this side groove 110, the horizontal surface 106 of the lid receiving portion 107 in the side groove 100 is formed as an inclined surface 111 so that the inside of the side groove main body 103 is lowered. This prevents the generation of rattling noises.

  The applicant has no particular knowledge as a document describing the above prior art at the time of filing this application.

  However, in the conventional side grooves 100 and 110 described above, the side groove main body 103 and the lid 104 are supported by bringing the flat surfaces into contact with each other in the lid receiving portion 107, so that the lid 104 is stably supported. In order to do so, it is necessary to bring these planes into surface contact. However, the side groove is generally a concrete product, and even if the precision of the mold such as the mold is high, the concrete shrinks when it hardens, and it is difficult to obtain the desired plane accuracy and parallel accuracy. there were. For this reason, the lid 104 cannot be stably supported by the lid receiving portion 107, and a rattling sound generated when a person or a vehicle passes over the lid 104 cannot be prevented.

  Further, when the lid 104 is supported by the inclined surface 111 formed on the lid receiving portion 107 of the side groove main body 103, dirt or pebbles hardly accumulate in the lid receiving portion 107, but a large load is applied to the lid 104. There is a problem in that the side groove main body 103 is damaged by the lid 104 acting as a wedge. More specifically, in the lid receiving portion 107 of the side groove main body 103, the force acting from the lid 104 to the side groove main body 103 becomes a force acting substantially perpendicular to the inclined surface 111 and in the direction toward the outside of the side groove main body 103. A force that separates the pair of side wall portions 101 acts on the pair of side wall portions 101, and the force exceeds the strength of the side groove main body 103, so that the side groove main body 103 is damaged. Here, the side groove 110 having the bottom portion 102 has been described, but the same problem also occurs in a side groove that is connected at the top of a pair of side wall portions and does not have a bottom portion, a so-called free-gradient side groove. To do.

  Further, when the lid 104 is supported by the inclined surface 111 formed on the lid receiving portion 107 of the side groove main body 110, the lid 104 slips on the inclined surface 111 of the lid receiving portion 107 when an uneven load is applied to the lid 104. The lid 104 may come off from the side groove main body 103.

  In the above description, the side groove has been described as an example of the structure, but other types of structures have the same problem as described above.

  Therefore, in view of the above situation, the present invention prevents rattling between the first member and the second member in a structure including the first member and the second member received by the pair of first members. An object of the present invention is to provide a structure and a support structure that can improve the strength by controlling the direction in which the load acts when a large load is applied.

  The structure according to the present invention includes: “at least one pair of first members having a receiving portion formed with a contact surface portion at one end and disposed so that the receiving portions face each other; and the receiving portion of the first member. And a second member supported by the pair of first members, and having the contact portions formed on the opposite ends, the contact portions of the first member and the second member being in contact with each other. In the state where the surface portions are in contact with each other, the force acting on the receiving portion of the first member increases as the load applied in the direction of supporting the second member by the pair of first members increases. The receiving portion of the first member is changed from a direction away from each other to an approaching direction ”.

  Here, the structure is not particularly limited, and may be any structure provided with at least a pair of first members and a second member supported by the pair of first members. And underground structures, bridges, tunnels, underdrains, and the like.

  Further, the contact surface portion is not particularly limited, but the cross-sectional shape is preferably a predetermined curved shape, for example, an arc shape, an elliptical arc shape (excluding an arc shape), a quadratic curve shape, an nth order Various geometric curved shapes such as a curved shape, an involute curved shape, a polygonal shape, etc. can be exemplified, and the lower end of the contact surface portion is located inside the pair of first members with respect to the upper end of the receiving portion. It is desirable to make it a form to do. In addition, a contact surface part means the part of the surface which may contact each other.

  By the way, as a result of intensive research, the inventor of the present application disperses the force acting on the receiving portion of the first member by making the contact surface portion into a predetermined shape, and a part of the force acts in a predetermined direction. I found out that Specifically, for example, when a load is applied in the vertical direction in a state where the second member is arranged so as to be substantially horizontal, a flat inclined surface 111 is formed on the lid receiving portion 107 as shown in FIG. In the case of the one provided, the horizontal outward load acting on the first member also increases in proportion to the increase in the vertical load, and the side groove body having the first member eventually breaks. When the contactable portion (contact surface portion) between the member and the second member is, for example, a cross section having a predetermined curved shape, the horizontal outward direction acting on the first member as the load in the vertical direction increases. However, the rate of increase gradually decreases, and it has been found that the load bearing strength of the side groove body is dramatically improved. For this reason, in addition to the load being dispersed at the contact surface, the contact portion between the first member and the second member at the contact surface moves or expands as the load increases. A part of the load in the direction becomes a load in the vertical direction or in the horizontal direction, and the load in the horizontal direction outward is relatively reduced. Alternatively, as the load increases, a frictional force along the contact surface portion is generated at the contact portion between the first member and the second member at the contact surface portion, and the load outward in the horizontal direction is relatively caused by the friction force. Based on this finding, the present invention has been made.

  According to the present invention, as the load applied in the direction in which the second member is supported by the pair of first members increases, the force acting on the receiving portion approaches the receiving portion from the direction in which the pair of receiving portions separate from each other. Therefore, if a large load is applied, the pair of receiving parts will be drawn toward the second member, and the pair of first members may move away from each other, or the second member Can be prevented from coming off from the receiving portion of the first member, and the second member can be more firmly supported by the pair of first members.

  In addition, when applied to a side groove as a structure, even if a large load acts on the lid, the first member is a side wall portion of the side groove and the second member is a lid of the side groove. The lid does not act as a wedge with respect to the side wall portion, and the side groove main body having the pair of side wall portions can be prevented from being damaged by a large load.

  The structure according to the present invention includes: “at least one pair of first members having a receiving portion formed with a contact surface portion at one end and disposed so that the receiving portions face each other; and the receiving portion of the first member. And a second member supported by the pair of first members, and having the contact portions formed on the opposite ends, the contact portions of the first member and the second member being in contact with each other. In the state where the surface portions are in contact with each other, the force acting on the receiving portion of the first member increases as the load applied in the direction of supporting the second member by the pair of first members increases. The receiving portion of the first member is changed so as to decrease the amount of increase that acts in a direction away from each other ”.

  According to the present invention, as the load applied in the direction in which the second member is supported by the pair of first members increases, the rate at which the force acting in the direction in which the pair of receiving portions separate from each other decreases at the contact surface portion. Therefore, even if a large load is applied, the force acting in the direction of separating the pair of receiving portions can be prevented from becoming unnecessarily large, and the second member is the receiving portion of the first member. It is possible to prevent the structure from being detached from the structure or being damaged.

  In addition to the above-described structure, the structure according to the present invention may be “the contact width between the contact surface portion of the first member and the contact surface portion of the second member is 1 mm to 400 mm, or the second member. It is also possible to adopt a configuration in which the thickness is 0.5% to 50% with respect to the thickness.

  Here, the contact width is 1 mm to 400 mm, or 0.5% to 50% with respect to the thickness of the second member. When the contact width is less than 1 mm or 0.5%, the contact width This is because the load applied to the portion is too concentrated and may be damaged. In addition, let the minimum with respect to the thickness of a 2nd member be a ratio which does not become smaller than 1 mm. Also, if the contact width is larger than 300 mm or 50%, if the contact portion becomes wider than this, further improvement in the effect cannot be expected, and the dimensional accuracy of the contact surface portion between the first member and the second member is increased. This is because the cost must be increased. Moreover, if it becomes wider than this, the frictional resistance increases, and it becomes difficult for the first member and the second member to move relative to each other, and the above effect may not be obtained. The lower limit of the contact width may be 0.5 mm, 1.5 mm, 2 mm, or 1%, 2%, and the upper limit may be 300 mm, 200 mm, 40%, 30%.

  According to the present invention, the contact width is 1 mm to 400 mm, or 0.5% to 50% with respect to the thickness of the second member. A contact state can be made into a favorable state and the said effect can be show | played reliably.

  In addition to the above-described structure, the structure according to the present invention may be configured such that “the contact width between the contact surface portion of the first member and the contact surface portion of the second member is the second member of the pair of the first member”. It varies according to at least one of the load applied in the direction supported by one member and the contraction / expansion of the first member and the second member ”.

  Here, the fluctuation means that the position of the contact width (the position of the contact portion in the contact surface portion) changes or the width of the contact width changes. Further, the contraction / expansion of the first member and the second member occurs due to changes in temperature, humidity, and the like depending on the environment in which the materials are used for the first member and the second member. , Thermal expansion, thermal contraction, shrinkage due to drying, expansion due to moisture absorption, and the like.

  According to the present invention, the contact width at the contact surface portion varies according to the load and the contraction and expansion of the first member and the second member. Therefore, the contact width according to the magnitude of the load and the contraction and expansion is obtained. While being able to transmit favorably, a 2nd member can be stably supported by a pair of 1st member.

  In addition to the above-described structure, the structure according to the present invention may be configured such that the cross-sectional shape of the contact surface portions of the pair of first members and the contact surface portions at both ends of the second member is a double circle or an ellipse. It has a circular arc shape, and the focal position of the contact surface portion of the first member is different from the focal position of the contact surface portion of the second member.

  Here, the double circle is an ellipse composed of two circles centered on two points provided at a predetermined distance, and a straight line or a curve that faces each other across the two circles. Say something of similar shape. In addition, an ellipse here refers to an object excluding a circle. Further, the focal position is the position of the center point of two circles in the case of a double circle, and the position of the center point in the case of an ellipse.

  According to the present invention, the cross section of the contact surface portion is a circular or elliptical arc shape, and the focal positions of the contact surface portions of the first member and the second member are different from each other. Even if it is bad, it becomes possible to obtain a predetermined contact width at the contact surface portion, and a sufficient contact area between the first member and the second member can be secured. Thereby, even if the dimensional accuracy of the structure is low, the structure can be favorably supported, and the cost for the structure can be reduced. Moreover, since a 2nd member can be favorably supported by a pair of 1st member, rattling can be prevented and generation | occurrence | production of a noise can be suppressed. In addition, when a contact surface part is made into a double circular arc shape, it can support more stably, so that the distance between the center points of a double circle is enlarged.

  By the way, when the cross-sectional shape of the contact surface portion is a circular arc shape of the circle, or the focal positions of the contact surface portions of the first member and the second member are substantially the same position, the center point and the focus of each contact surface portion are When approximately matching, the first member and the second member are likely to rotate relative to each other. In this state, for example, if an offset load is applied to the second member, the first member and the second member rotate relative to each other. There was a possibility that the second member may come off from the first member. However, according to the present invention, since the focal positions of the contact surfaces of the first member and the second member are different from each other, the first member and the second member are difficult to rotate relative to each other. Even if an uneven load is applied to the member, the first member and the second member can be prevented from rotating relative to each other, and the second member can be satisfactorily prevented from detaching from the first member. The support of the two members can be further stabilized.

  In addition to the above-described structure, the structure according to the present invention has a "parabolic shape in cross section of the contact surface portions of the pair of first members and the contact surface portions at both ends of the second member. It has a configuration.

  According to the present invention, the cross-sectional shape of the contact surface portion is a parabolic shape, and the same effect as described above can be achieved also by this. In addition, as a parabola used for a cross-sectional shape, it is preferable to use a parabola whose apex is downward. Further, a quadratic curve or a curve of a cubic curve or higher may be used.

  The support structure according to the present invention includes: “at least one pair of first members having a receiving portion formed with a contact surface portion at one end and disposed so that the receiving portions face each other; Is a support structure that supports a second member that is received by a part and that has a receiving part formed with a contact surface part at both ends, and a load applied in a direction in which the second member is supported by the pair of first members. As the force increases, the force acting on the receiving portion of the first member changes such that the receiving portions of the pair of first members change from a direction away from each other to an approaching direction. And the said contact surface part of said 2nd member is set as the structure which makes a pair of said 1st member support said 2nd member by mutually contacting.

  According to the present invention, the structure in which the second member is supported by the pair of first members acts on the receiving portion of the first member as the load applied in the direction of supporting the second member by the pair of first members increases. It is structured to support a pair of receiving parts via a contact surface part formed so as to change from a direction away from each other to a direction approaching each other, thereby producing the same effect as above. Can do. In addition, since it can also prevent generation | occurrence | production of rattling by adapting the support structure of this invention to a side groove | channel, it can also be set as a silence type side groove | channel structure.

  As described above, according to the present invention, in the structure including the first member and the second member received by the first member, rattling between the first member and the second member is prevented and a large load is applied. Further, it is possible to provide a structure and a support structure that can improve the strength by controlling the direction in which the load acts.

  Hereinafter, a structure which is the best mode for carrying out the present invention will be described in detail with reference to FIGS. 1 and 2. Here, a side groove will be described as an example of the structure. FIG. 1A is a perspective view showing an example in which the structure of the present invention is applied to a side groove, and FIG. 1B is a sectional view of the side groove of FIG. FIG. 2 is an enlarged cross-sectional view showing a main part of the side groove shown in FIG.

  As shown in the drawing, the side groove 10 of the present embodiment includes a pair of side wall portions 11 that are spaced apart from each other by a predetermined distance, a top plate portion 12 that connects upper ends of the pair of side wall portions 11, and a top plate portion. 12, a side groove main body 14 having a rectangular opening 13 having a predetermined length, a plurality of lids 15 fitted to the opening 13 of the side groove main body 14 to close the opening 13, and a side groove main body. 14 and a bottom member 16 having a U-shaped cross section. The side groove main body 14 of the present example has a form substantially equivalent to that called a free gradient type side groove.

  The side groove main body 14 is formed with a receiving portion 17 for supporting the lid 15 at the upper end of the side wall portion 11 at the position where the opening 13 is provided, and the receiving portions 17 of the pair of side wall portions 11 are respectively connected to each other. It arrange | positions so that it may oppose. The receiving portion 17 has a constant cross-sectional shape and is formed so as to be continuous in the longitudinal direction of the side groove main body 14, and as shown in FIG. 2, a rising surface portion 18 that faces the inner side of the side groove main body 14, Continuing from the lower end of the surface portion 18, the contact surface portion 19 has a predetermined curved shape in cross section, and a marginal portion 20 formed in a step shape at the inner end of the side groove main body 14 of the contact surface portion 19. In this example, the contact surface portion 19 of the receiving portion 17 has an arc shape having a substantially constant radius of curvature R1 centered on the point P1, as shown in FIG. The circular arc shape of the surface portion 19 is a part of an oval type bi-circular shape, similar to a contact surface portion of the lid 15 described later. Moreover, the receiving part 17 is formed in the side wall part 11 so that it may protrude inside the side groove | channel main body 14. FIG.

  The lid 15 includes a receiving portion 21 that is received by the receiving portions 17 of the pair of side wall portions 11 at both ends in the width direction (left and right direction in FIG. 2). A contact surface portion 22 is formed which has a predetermined curved shape that continues to the left and right side surfaces of the lid 15 and has the other end continuing to the bottom surface of the lid 15. In this example, the contact surface portion 22 of the receiving portion 21 has an arc shape having a substantially constant radius of curvature R2 with the point P2 as the center, as shown by the curved shape thereof. In other words, the left and right contact surface portions 22 of the lid 15 are part of an oval bi-circular shape as indicated by a two-dot chain line in FIG. Note that the position of the point P2 is different from the position of the point P1, and in FIG. 2, in order to clarify the difference in position between the point P1 and the point P2, these positions are exaggerated from the actual position. It is shown.

  The lid 15 is formed with a handle portion 23 having a predetermined shape that is used when the lid 15 is attached to and detached from the side groove main body 14 at substantially the center of both ends in the longitudinal direction. In the side groove 10 of this example, the length of the opening 13 of the side groove main body 14 is set such that the two lids 15 can be fitted and supported. The number of lids 15 supported by one side groove main body 14 can be arbitrarily set, and the lengths of the side groove main body 14, the opening 13 and the lid 15 can be appropriately set accordingly. it can.

  As shown in FIG. 1, the bottom member 16 includes a pair of side wall portions 24 that are spaced apart from each other by a predetermined distance and a bottom plate portion 25 that connects the lower ends of the pair of side wall portions 24. The pair of side wall portions 24 are disposed at substantially the same interval as the pair of side wall portions 11 of the side groove main body 14, and the bottom surface of the pair of side wall portions 11 of the side groove main body 14 is disposed on the upper surface of the pair of side wall portions 24 of the bottom member 16. , The side groove main body 14 is placed on the bottom member 16.

  Further, the bottom plate portion 25 of the bottom member 16 has an upper surface that is inclined with a predetermined angle in the longitudinal direction. Thereby, the angle of the surface where the bottom member 16 is installed and the angle of the bottom surface of the flow path in the side groove 10 can be set to different angles. In detail, in the conventional free-gradient-type side groove, first, the foundation is built with concrete at the bottom of the installation groove, and then the free-gradient-type side groove side groove body is placed on the foundation, and then the side-groove body Finishing concrete is cast from the opening of the side and finished so that the upper surface has a predetermined slope, thereby constructing a side groove having a bottom surface having an angle different from the angle of the slope on which the side groove is installed. However, when finishing the bottom surface of the side groove, the side groove main body has a top plate portion, so that the finishing work is difficult and time-consuming. Therefore, by arranging a bottom member 16 having a bottom surface of a predetermined angle in advance on a foundation formed in an installation groove for installing a side groove, and further arranging a side groove main body 14 thereon, the slope and the side groove are arranged. It is possible to easily construct the side grooves 10 having different angles with respect to the bottom surface.

  Incidentally, in this example, the radius R1 and the radius R2 are substantially the same radius, and the dimension thereof is about 55 mm. The lid 15 has a thickness of about 110 mm. Further, the contact width at the contact surfaces 19 and 22 is 1 mm to 55 mm, or 1% to 50% with respect to the thickness of the lid 15.

  In addition, although the side groove main body 14, the lid | cover 15, and the bottom member 16 of this example are each made from concrete, although illustration is abbreviate | omitted, the reinforcing steel bar is embed | buried in those inside. Further, the side wall 11 of this example corresponds to the first member of the present invention, and the lid 15 of this example corresponds to the second member of the present invention.

  Next, the effect | action of the support structure of the side groove main body 14 and the lid | cover 15 in the side groove 10 of this embodiment is demonstrated in detail based on FIG. First, after the bottom member 16 and the side groove main body 14 are arranged at predetermined positions, the lid 104 is fitted into the opening 13 of the side groove main body 14. Specifically, the lid 15 is lowered from above the side groove body 14 so that the left and right receiving parts 17 formed on the pair of side wall parts of the side groove body 14 support the receiving parts 21 at both ends of the lid 15. Let At this time, first, in the vicinity of the upper end of the contact surface portion 19 of the receiving portion 17, the contact portion 22 comes into contact with the contact surface portion 22 of the received portion 21. It fluctuates by expanding or moving to the side, and the descent of the lid 15 stops at a certain position, and the lid 15 is supported by the side groove main body 14.

  In the state where the lid 15 is supported by the side groove main body 14, the contact portion between the contact surface portion 19 of the receiving portion 17 and the contact surface portion 22 of the received portion 21 is theoretically a point contact in a sectional view. However, in reality, since the material constituting each of the contact surface portions 19 and 22 has a certain degree of elasticity, the contact portions come into contact with each other with a predetermined contact width, and the contact width is the side groove main body 14. It extends over substantially the entire length of the lid 15 in the longitudinal direction. As a result, a sufficient contact area between the side groove main body 14 and the lid 15 can be secured, and the contact surface portions 19 and 22 have a predetermined arc shape. This load is distributed radially, the load applied to the side groove main body 14 and the lid 15 is reduced, the load bearing strength is improved, and the service life is prolonged. Moreover, the support of the lid 15 is stabilized and rattling is prevented.

  In the side groove 10, the contact width of the contact surface portions 19, 22 tends to increase or move downward as the load applied to the lid 15 increases, and people, vehicles, etc. are placed on the lid 15. Then, when a load is applied to the lid 15, the lid 15 is lowered (slightly) according to the load, the contact width is changed, and the pair of receiving portions 17 are separated from each other as the load increases. It is designed to be drawn in the direction of approaching. More specifically, when the load in the vertical direction applied to the lid 15 is small, the load is supported near the upper end of the contact surface portions 19 and 22 rising in the vertical direction. A large amount of acting components are included, and the pair of receiving portions 17 are to be separated from each other. However, since the load applied to the lid 15 is small, the strength of the side groove main body 14 and the lid 15 is excellent, and they are damaged. There is no. In this state, as the load applied to the lid 15 increases, the component acting in the horizontal direction of the relatively dispersed load also increases, but the contact width of the contact surfaces 19 and 22 is lower (the contact surface 19). , 22 of the portion facing more in the horizontal direction), more of the distributed load gradually increases in the component acting in the vertical direction than in the horizontal direction, and the load applied to the lid 15 increases. On the other hand, the rate of increase in the load acting in the horizontal direction decreases, and the load acting in the horizontal direction does not increase from a certain load. Since the side groove main body 14 and the lid 15 of this example have sufficient strength against the load acting in the horizontal direction at that time, the side groove main body 14 and the lid 15 are not damaged and further increase the load applied to the lid 15. However, since the load acting in the horizontal direction does not increase, the load applied in the horizontal direction is not damaged, and the load bearing strength of the side groove main body 14 and the lid 15 is improved.

  Further, in this example, as the load applied to the lid 15 increases, the contact width of the contact surfaces 19 and 22 fluctuates downward. Along the frictional force. And in this example, since the contact surface parts 19 and 22 are made into the predetermined circular arc shape, the force which the contact surface part 19 of the receiving part 17 winds around the contact surface part 22 of the to-be-received part 21 by the frictional force, In other words, a force is applied so that the receiving portion 17 of the side groove main body 14 wraps both ends of the lid 15. That is, since the force acts in a direction in which the pair of receiving portions 17 approach each other, the side groove main body 14 can be prevented from being damaged even if the load applied to the lid 15 is increased, and the side groove main body 14 is also damaged. The lid 15 can be supported more firmly.

  On the other hand, when an uneven load is applied to the lid 15, the contact surface portion 19 of the receiving portion 17 and the center points P <b> 1 and P <b> 2 of the contact surface portion 22 of the received portion 21 are different from each other, and Since the distance between the center points is sufficiently large with respect to the radius, it is difficult for the respective contact portions to rotate relative to each other, and the lid 15 rotates and disengages from the side groove main body 14 due to the offset load. Is preventing.

  As described above, according to the side groove 10 of the present embodiment, when a large load is applied to the lid 15, the pair of receiving portions 17 are attracted toward the lid 15, and the pair of side wall portions 11 are separated from each other. It is possible to prevent the lid 15 from moving or being detached from the receiving portion 17 of the side wall portion 11, and to support the lid 15 more firmly and to favorably attach the lid 15 to the pair of side wall portions 11. Since it can be made to support, it can prevent rattling and can suppress generation of noise. That is, by using the above-described support structure, the side groove 10 can be a muffler side groove.

  Further, the contact width at the contact surface portions 19 and 22 varies depending on the load applied to the lid 15 and the contraction and expansion of the side groove main body 14 and the lid 15, so that the contact width corresponds to the magnitude of the load and the degree of contraction and expansion. The load can be transmitted well, and the lid 15 can be stably supported by the pair of side wall portions 11.

  Moreover, since the cross sections of the contact surface portions 19 and 22 have a predetermined arc shape, it is possible to obtain a predetermined contact width at the contact surface portions 19 and 22 even if the dimensional accuracy of the side groove main body 14 and the lid 15 is poor. A sufficient contact area can be ensured, and even when the dimensional accuracy of the side groove main body 14 and the lid 15 is low, it can be supported well, and the cost for the side groove 10 can be reduced.

  Furthermore, since the focal positions of the contact surface portions 19 and 22 are different from each other, the lid 15 is difficult to rotate, and even when an uneven load is applied to the lid 15, the lid 15 can be prevented from rotating. 15 can be satisfactorily prevented from coming off and the support of the lid 15 can be made more stable.

  The present invention has been described with reference to a preferred embodiment. However, the present invention is not limited to this embodiment, and various improvements and modifications can be made without departing from the scope of the present invention, as described below. Design changes are possible.

  That is, in the side groove 10 of the present embodiment, a shape in which the bottom member 16 is disposed below the side groove main body 14 is shown. However, the present invention is not limited to this, and the conventional free gradient without using the bottom member 16 is used. It can also be set as a mold side groove, and the same effect as described above can be obtained.

  Moreover, although the thing of the cross-section reverse U-shape form which the lower end of the side groove main body 14 was open | released was shown in the side groove 10 of this embodiment, it is not limited to this, FIG. 3 (A) and (B) A side groove provided with a side groove body having a U-shaped cross section with an open upper end as shown in FIG. Hereinafter, an example shown in FIG. 3 will be described. In addition, about the same structure as the said embodiment, while attaching | subjecting the same code | symbol, detailed description is abbreviate | omitted. A side groove 30 shown in FIG. 1A includes a side groove body 32 having a bottom plate portion 31 that connects lower ends of a pair of side wall portions 11. The side groove body 32 has a flat surface in which the outer wall surface of the side wall portion 11 is substantially vertical, and a protruding portion 33 that protrudes inwardly is formed on the upper end portion of the side wall portion 11, and a lid is formed on the upper end portion of the protruding portion 33. The receiving part 17 for receiving 15 is formed. On the other hand, the side groove 35 of FIG. 3B is formed with a protruding portion 37 protruding outward at the upper end portion of the side wall portion 11 of the side groove main body 36, and receives the lid 15 at the inner upper end portion of the protruding portion 37. The receiving part 17 for this is formed. Also in these side grooves 30 and 35, the support structure of the pair of side wall portions 11 and the lid 15 is the same structure as the above-described side groove 10, and the same operational effects as described above can be achieved. Note that the side groove 30 shown in FIG. 3A has a flow rate that the side groove 30 can flow when the side groove main bodies 32 and 36 have the same width as the side groove 35 shown in FIG. Can be more.

  Moreover, although the side groove | channel 10,30,35 of this embodiment showed what the circular arc-shaped contact surface part 19 was formed in the receiving part 17, it is not limited to this, For example, as shown in FIG. The thing provided with the receiving part 40 of the form may be sufficient. The receiving portion 40 includes a rising surface portion 41 that rises obliquely and a horizontal surface portion 42 that extends substantially horizontally. When the load applied to the lid 43 is small, the rising surface portion 41 and the contact surface portion 44 of the lid 43 However, as the load increases, the lid 43 descends and the contact surface portion 44 near the bottom surface of the lid 43 and the horizontal plane portion 42 come into contact with each other. In addition, since the load is supported also in the horizontal plane portion 42, the rate of increase in the force acting so as to separate the pair of receiving portions 40 from each other is reduced, and the side wall portion 11 having the receiving portions 40 is provided. It is possible to prevent the side groove main body 45 from being damaged. Note that the rising surface portion 41 and the horizontal surface portion 42 in this example correspond to the contact surface portion of the present invention.

  Moreover, in the side groove of this embodiment, although the thing made from a solid concrete was shown as a lid | cover, it is not limited to this, It shall be a lid | cover formed in the grid | lattice form, such as grating, and net-like. Even in this case, the same effects as described above can be obtained by providing the receiving portions having the contact surface portions formed at both ends thereof.

  Furthermore, in this embodiment, the side groove is shown as the structure, and the structure applied to them is shown as the support structure. However, the present invention is not limited to these, and in addition to the side groove, a water channel, an underground structure, a bridge, a tunnel , Culverts, etc., and can also be applied as their support structure. In addition, although concrete is shown as the material, the material is not limited to this, and a material, metal, resin, or composite material having strength or durability equal to or higher than that of concrete should be used. These can also provide the same effects as described above.

(A) is a perspective view which shows an example applied to the side groove | channel as a structure of this invention, (B) is sectional drawing of the side groove | channel of (A). It is sectional drawing which expands and shows the principal part of the side groove | channel shown in FIG. It is sectional drawing which shows the side groove of a form different from FIG. It is sectional drawing which shows the principal part of the structure of another different this invention. (A) is sectional drawing which shows the conventional side groove, (B) is sectional drawing which shows the conventional side groove different from (A).

Explanation of symbols

10 Gutter (structure)
11 Side wall (first member)
15 Lid (second member)
17 receiving portion 19 contact surface portion 21 received portion 22 contact surface portion 30 side groove (structure)
35 Gutter (structure)
40 receiving portion 41 rising surface portion (contact surface portion)
42 Horizontal part (contact part)
43 Lid (second member)
44 Interface

Claims (7)

At least one pair of first members having a receiving part formed with a contact surface part at one end and arranged to face the receiving part;
A second member that is received by the receiving portion of the first member and has a receiving portion formed with a contact surface portion at both ends and supported by the pair of first members;
The contact surfaces of the first member and the second member are in contact with each other, and as the load applied in the direction of supporting the second member by the pair of first members increases, A structure in which a force acting on the receiving part is changed from a direction in which the receiving parts of the pair of first members are separated from each other. At least one pair of first members having a receiving part formed with a contact surface part at one end and arranged to face the receiving part;
A second member that is received by the receiving portion of the first member and has a receiving portion formed with a contact surface portion at both ends and supported by the pair of first members;
The contact surfaces of the first member and the second member are in contact with each other, and as the load applied in the direction of supporting the second member by the pair of first members increases, The structure is characterized in that the force acting on the receiving portion is changed so that the amount of increase that acts in the direction in which the receiving portions of the pair of first members are separated from each other decreases. The contact width between the contact surface portion of the first member and the contact surface portion of the second member is:
The structure according to claim 1, wherein the structure is 1 mm to 400 mm or 0.5% to 50% with respect to the thickness of the second member. The contact width between the contact surface portion of the first member and the contact surface portion of the second member is:
The second member fluctuates in accordance with at least one of a load applied in a direction in which the second member is supported by the pair of first members and a contraction / expansion of the first member and the second member. The structure according to any one of claims 1 to 3. The contact surface portions of the pair of first members and the contact surface portions at both ends of the second member are:
The cross-sectional shape is a circular or elliptical arc shape, and the focal position of the contact surface portion of the first member is different from the focal position of the contact surface portion of the second member. The structure according to any one of claims 1 to 4, characterized in that: The contact surface portions of the pair of first members and the contact surface portions at both ends of the second member are:
The structure according to any one of claims 1 to 4, wherein the cross-sectional shape is a parabolic shape. At least one pair of first members, each having a receiving portion formed with a contact surface portion and arranged to face each other, are received by the receiving portion of the first member to form the contact surface portion. A support structure for supporting the second member having the received parts at both ends,
As the load applied in the direction of supporting the second member by the pair of first members increases, the force acting on the receiving portions of the first member causes the receiving portions of the pair of first members to mutually The first member formed so as to change from the separating direction to the approaching direction and the contact surface portion of the second member are brought into contact with each other, thereby allowing the pair of first members to support the second member. A support structure characterized by that.

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