JP5684202B2 - Trough and trough connection structure and trough connection method - Google Patents

Description

  The present invention relates to a trough that accommodates a cable or the like and is laid on a railroad track, a side of a road, or the like and a connection structure of the trough.

  The trough is composed of a trough body having a concave cross section and a lid placed on the trough body. Conventionally, when laying this trough over a long distance, it is installed in the longitudinal direction so that the end faces of the trough body of a predetermined length face each other, and then a mortar or the like is packed in the gap between adjacent trough bodies They were connected (see Patent Document 1).

  As another trough connection structure, a protruding edge and groove having a U-shape with an opening facing outward are provided on the outer surface of one end of the trough body, and an opening is formed on the inner surface of the other end. A groove having a U-shape facing inward and a protruding edge are provided, and the protruding edge at one end and the groove at the other end are fitted, and the groove at one end and the protruding edge at the other end are There is an example in which the side surfaces of the trough main bodies are connected to each other by fitting and the trough main bodies are connected (see Patent Document 2).

JP 2002-054121 A JP 2004-153937 A

  However, in the conventional trough connection structure, when the thickness of the side plate of the trough body is reduced, the height of the protruding edge provided at the end of the trough body is reduced and the depth of the groove is reduced. When the connection becomes insufficient and a pulling force is applied to the trough body, there is a problem that one trough may be detached from the connection structure. In addition, when the thickness of the side plate of the trough body is reduced, if the height of the protruding edge or the depth of the groove is increased, the thickness of the side plate at the location where the groove is provided becomes insufficient, and the protruding edge is deformed. There was also a problem of breaking or breaking.

The present invention has been made in view of the above-described problems, and an object of the present invention is to obtain a trough and a trough coupling structure and a trough coupling method having a structure capable of firmly coupling the troughs.

In order to achieve the above-mentioned object, the following invention is provided.
(1) A trough body comprising a bottom plate and a pair of side plates and having an opening at the top;
A trough that covers the opening of the trough body, and is a trough that can be connected to each other, the male part having a convex part formed on the lower side of the bottom plate at the end of the trough body, A female portion having a recess formed on the upper side of the bottom plate at the other end of the trough body, the male portion having a bent portion protruding from a front end of the outer surface of the side plate, The portion has a groove formed in the side plate and a bent portion protruding to the inner surface at the tip of the female portion, and the inner size of the bent portion of the female portion is larger than the outer size of the side wall of the male portion. The inner dimension of the groove part of the female part is larger than the outer dimension of the bent part of the male part, and the outer dimension of the bent part of the male part is larger than the inner dimension of the bent part of the female part. The length of the groove portion in the longitudinal direction is formed larger than the length in the longitudinal direction of the bent portion of the male portion. The bent part of the male part can be obliquely connected to the groove part of the female part at an angle, and the convex part can be fitted to the concave part and can be moved back and forth and left and right. The dimension of the concave part is formed larger than the convex part in both the width direction and the longitudinal direction, and the bent part of the male part can be fitted into the groove part of the female part and the bent part of the female part. The trough, wherein the convex part of the male part fits into the concave part of the female part, and the trough main body is connected to each other.
( 2 ) A plurality of projections are provided in the concave portion formed on the upper side of the bottom plate of the female portion, and the convex portion formed on the lower side of the bottom plate of the male portion can contact the projection. The trough according to (1), characterized in that it exists.
( 3 ) A plurality of protrusions are provided on the bottom plate of the female part and the concave part, and the bottom plate of the male part is capable of contacting the protrusion provided on the bottom plate of the female part, and is provided in the concave part. The trough according to (1), wherein the convex portion can contact the protrusion.
( 4 ) The trough according to (1), wherein the convex part formed on the lower side of the bottom plate of the male part is deformable by pressing.
( 5 ) The trough according to any one of (1) to ( 4 ), wherein an attachment groove for attaching a metal band for fixing the trough body and the lid is provided on an upper surface of the lid. .
( 6 ) A trough connection structure, wherein a plurality of troughs according to any one of (1) to (5) are connected to each other.
( 7 ) In the trough connection structure according to ( 6 ), the stress acting on the trough due to thermal expansion or contraction of the trough due to environmental temperature change is applied to the protrusion formed on the female portion of the trough body or the male of the trough body. A trough connection structure characterized in that the deformation of the connection portion of the trough body is prevented by absorbing by any of the deformation of the convex portion formed on the bottom plate of the portion.
(8) A trough comprising a bottom plate and a pair of side plates and having an opening at the top thereof, and a lid covering the opening of the trough body, the trough being connectable to each other, A male part having a bent part projecting to the outer surface of the side plate at the end part, a convex part formed on the lower side of the bottom plate, and a groove part formed in the side plate at the other end part of the trough body; A female portion having a recess formed on an upper side of the bottom plate, the male portion has a bent portion protruding from a front end of an outer surface of the side plate, and the female portion is formed on the side plate. A groove portion and a bent portion protruding to the inner surface at the tip of the female portion, the female portion has a groove portion formed in the side plate and a bent portion protruding to the inner surface at the tip of the female portion, The inner dimension of the bent part of the female part is larger than the outer dimension of the side wall of the male part, and the groove part of the female part The inner dimension is larger than the outer dimension of the bent portion of the male part, the outer dimension of the bent part of the male part is formed larger than the inner dimension of the bent part of the female part, and the length of the groove part of the female part in the longitudinal direction is further increased. The length of the concave portion of the male part is larger than the length of the male part, and the size of the concave part is larger than the convex part in both the width direction and the longitudinal direction. By fitting it and moving it back and forth, left and right, the bent part and the convex part of the male part are fitted into the groove part of the female part, the bent part of the female part and the concave part , respectively . A method of connecting troughs, wherein the trough bodies are connected to each other, the step of superimposing a male part of the second trough body on a female part of the first trough body; In the groove of the female portion of the first trough body, the second trough A step of fitting the bent portion of the male portion of the main body and aligning it; a step of aligning the bottom plate of the first trough main body and the bottom plate of the second trough main body; And a step of fitting the convex portion of the second trough main body into the concave portion of the female portion of the trough main body, and performing alignment .
(9) A trough comprising a bottom plate and a pair of side plates and having an opening at the top, and a lid that covers the opening of the trough body, the trough being connectable to each other, A male part having a convex part formed on the lower side of the bottom plate at the end part and a female part having a concave part formed on the upper side of the bottom plate at the other end part of the trough body; The convex part of the male part is fitted into the concave part of the female part, the trough bodies are connected to each other, and a plurality of protrusions are formed in the concave part formed on the bottom plate of the female part. The trough is provided, and the convex portion formed on the lower side of the bottom plate of the male portion can contact the projection.
(10) a trough body comprising a bottom plate and a pair of side plates and having an opening at the top;
A trough that covers the opening of the trough body, and is a trough that can be connected to each other, the male part having a convex part formed on the lower side of the bottom plate at the end of the trough body, A female portion having a recess formed on the upper side of the bottom plate at the other end of the trough body, and the convex portion of the male portion is fitted into the concave portion of the female portion, The trough bodies are connected to each other, a plurality of protrusions are provided on the bottom plate and the recess of the female part, and the bottom plate of the male part can contact the protrusion provided on the bottom plate of the female part, A trough characterized in that the convex portion can come into contact with a projection provided in the concave portion.
(11) A trough comprising a bottom plate and a pair of side plates and having an opening at the top thereof, and a lid covering the opening of the trough body, the troughs being connectable to each other, A male part having a convex part formed on the lower side of the bottom plate at the end part and a female part having a concave part formed on the upper side of the bottom plate at the other end part of the trough body; The convex part of the male part is fitted into the concave part of the female part, the trough bodies are connected to each other, and the convex part formed on the lower side of the bottom plate of the male part is pressed by A trough characterized by being deformable.
(12) A trough comprising a bottom plate and a pair of side plates and having an opening at the top thereof, and a lid covering the opening of the trough body, the troughs being connectable to each other, A male part having a convex part formed on the lower side of the bottom plate at the end part and a female part having a concave part formed on the upper side of the bottom plate at the other end part of the trough body; In the connecting structure of the troughs connected to each other, the convex part of the male part is fitted into the concave part of the female part, and the trough bodies are connected to each other. The stress acting on the trough due to thermal expansion or contraction of the trough is absorbed by either the protrusion formed on the female portion of the trough body or the deformation of the convex portion formed on the bottom plate of the male portion of the trough body. By changing the connection part of the trough body Connection structure of the trough, characterized in that to prevent.

According to the present invention, it is possible to obtain a trough, a trough connection structure and a trough connection method having a structure capable of firmly connecting troughs.

1 is a perspective view of a trough body 1 according to a first embodiment. The top view of the trough main body 1. FIG. The side view of the trough main body 1. FIG. The bottom view of the trough main body 1. FIG. X-X 'sectional drawing of the trough main body 1 in FIG. The expansion perspective view of the female part 13. FIG. The expansion perspective view of the baseplate 3 of the female part 13. FIG. The enlarged perspective view of the male part 11. FIG. Enlarged plan view of female part 13 and male part 11 Explanatory drawing explaining the engagement to the recessed part 25 of the convex part 17. FIG. (A), (b) The top view explaining connection of the male part 11 and the female part 13. FIG. The perspective view after the connection of the female part 13 and the male part 11. FIG. (A), (b) The figure explaining deformation | transformation of protrusion 27a, 27b. The expansion perspective view of the other example of the female part 13. FIG. Sectional drawing explaining the connection of the other example of the female part 13, and the male part 11. FIG. The enlarged plan view of the other example of the female part 13. FIG. The expansion perspective view which shows the male part 11a which concerns on 2nd Embodiment. (A)-(c) The top view explaining connection of the female part 13a and the male part 11a. (A), (b) The figure explaining the deformation | transformation of the convex part 17a. (A), (b) The top view and side view of the lid | cover 41. FIG. The perspective view of the metal band 51. FIG. The perspective view of the trough with which the lid | cover 41 was attached to the trough main body 1. FIG. II sectional drawing of FIG.

(First embodiment)
The trough according to the first embodiment will be described below based on the drawings. The trough according to the first embodiment includes a trough body 1 and a lid 41 described later. 1 is a perspective view of the trough body 1, FIG. 2 is a plan view of the trough body 1, FIG. 3 is a side view of the trough body 1, and FIG. 4 is a bottom view of the trough body 1. FIG. 3 is a sectional view of the trough body 1 taken along the line BB in FIG. 2.

  The trough body 1 is provided with a pair of side plates 5 a and 5 b on both sides of the bottom plate 3, and has an opening 6 at the top. A lid 41 described later covers the opening 6 of the trough body 1. The plurality of troughs can be connected to each other. The bottom plate 3 constitutes a bottom portion of the male portion 11, the main body portion 9, and the female portion 13 of the trough body 1 sandwiched between the side plates 5 a and 5 b. The trough body 1 includes a male part 11 and a female part 13 that connect adjacent troughs to each other, and a region other than the male part 11 and the female part 13 that is located between the male part 11 and the female part 13. An area other than the male part 11 and the female part 13 located between the male part 11 and the female part 13 is referred to as a main body part 9.

  A male part 11 is provided at the end of the trough body 1, and a convex part 17 is formed below the bottom plate 3 of the male part 11. A female portion 13 is provided at the other end of the trough body 1, and a recess 25 is formed above the bottom plate 3 of the female portion 13. The male part 11 has a size capable of entering the inside of the female part 13, and needs to have a dimension and shape in which the outer cross section of the male part 11 is included in the inner cross section of the female part 13. Moreover, the size of the female portion 13 is larger than the size of the male portion 11 so that the trough bodies can be loosely connected with an angle in the horizontal direction or the vertical direction.

  The trough body 1 and the lid 41 described later are preferably made of plastic. If it is made of plastic, it is lighter and has higher impact resistance than a concrete trough. The resin constituting the trough is preferably a resin in which flame retardancy is improved by adding an inorganic filler to a recycled resin containing polyethylene or polypropylene.

  Further, after connecting the male part 11 and the female part 13, the height of the convex part 17 of the male part 11, the thickness of the bottom plate 3, and the depth of the concave part 25 of the female part 13 are set so that no step occurs at the connecting part. When the convex portion 17 and the concave portion 25 are fitted, a step is set on the inner surface of the trough body 1. Therefore, the bottom plate 3 of the main body portion 9 and the bottom plate 3 of the female portion 13 have different heights, and a step portion 19 is formed at the boundary between the main body portion 9 and the female portion 13 so that the bottom plate 3 of the main body portion 9 becomes high. is there.

As shown in FIGS. 1 to 5, the male portion 11 of the trough body 1 is provided with a bent portion 15 that protrudes from the outer surface of the side plates 5 a and 5 b, and the side plates 5 a and 5 b of the female portion 13 of the trough body 1. A groove 23 may be formed in the groove. By loosely fitting the bent portion 15 and the groove portion 23, positioning when the trough body 1 is coupled can be performed. Furthermore, when the trough main bodies 1 are connected to each other, the gaps between the connecting portions can be reduced by the bent portions 15 and the groove portions 23, and the intrusion of the mouse from the gaps between the connecting portions can be prevented.
Further, when the bent portion 15 and the groove portion 23 are sufficiently deep, the bent portion 15 and the groove portion 23 are fitted deeply, and are formed on the convex portion 17 formed on the bottom plate of the male portion 11 and the bottom plate of the female portion 13. The trough body 1 can be prevented from coming off from the connection location not only by the fitting of the recessed portion 25 but also by the fitting of the bent portion and the groove portion 23.

(Structure of male part 11 and female part 13)
FIG. 6 is an enlarged perspective view of the female portion 13 of the trough body 1. FIG. 7 is an enlarged perspective view of the bottom plate 3 of the female portion 13. In FIG. 7, illustration of the side plates 5a and 5b is omitted. FIG. 8 is an enlarged perspective view of the male part 11. FIG. 8 is a view of the trough body 1 viewed from the direction A in FIG. FIG. 9 is an enlarged plan view of the female part 13 and the male part 11.

  As shown in FIG. 6, in the female portion 13, a U-shaped portion 24 is formed on the side plates 5 a and 5 b so as to be bent in a U-shape when viewed from the upper surface of the trough, and the end portion of the U-shaped portion 24 is The inner portion of the U-shaped portion 24 is a groove portion 23. As shown in FIG. 7, a recess 25 is formed on the upper surface of the bottom plate 3 of the female portion 13, and a plurality of protrusions 27 a, 27 b, 29 a, and 29 b are provided in the recess 25. These protrusions 27a, 27b, 29a, 29b are preferably provided so as to extend in a direction parallel to the longitudinal direction of the trough body. Moreover, it is preferable that the protrusion 27a and the protrusion 27b facing in the same direction are arranged at a line-symmetrical position with the center line in the longitudinal direction of the trough body as the axis of symmetry. The same applies to the projections 29a and 29b. Furthermore, the protrusion 27a and the protrusion 27b, and the protrusion 29a and the protrusion 29b are preferably arranged so as to face each other.

  As shown in FIG. 8, a rectangular parallelepiped convex portion 17 is formed below the bottom plate 3 of the male portion 11. The convex portion 17 is not limited to a rectangular parallelepiped shape, and may have various shapes such as a long cylindrical body and an elliptic cylindrical body, as long as it is substantially similar to the shape of a concave portion 25 described later that is symmetric in the trough width direction and the trough longitudinal direction. Well, the corners of the protrusions may be rounded.

  As shown in FIG. 9, since the male part 11 and the female part 13 are fitted, the inner dimension C of the female part bent part 21 is larger than the outer dimension F of the side wall of the male part 11, and the groove part 23 The inner dimension D is larger than the outer dimension E of the bent portion 15, and the relationship of C> F and D> E needs to be established.

(Traffic connection)
Next, the connection of the first trough body 1 to the second trough body 1 will be described. FIG. 10 is an explanatory view for explaining the engagement of the convex portion 17 with the concave portion 25. FIGS. 11A and 11B are diagrams illustrating the connection between the male part 11 and the female part 13. FIG. 12 is a perspective view of the female part 13 and the male part 11 after connection. FIGS. 13A and 13B are diagrams for explaining deformation of the protrusions 27a and 27b.

  A bent portion 15 formed so as to protrude from the outer surface of the side plates 5a and 5b of the male portion 11 of the first trough body and a convex portion 17 formed at the lower portion of the bottom plate 3 are respectively provided in the second trough body. The first trough main body and the second trough main body are fitted into a groove portion 23 formed inside the U-shaped portion 24 of the female portion 13 and a concave portion 25 formed on the upper surface of the bottom plate 3 of the female portion 13. Are concatenated.

  As shown in FIG. 10, the convex part 17 formed in the lower part of the bottom plate 3 of the male part 11 fits into the concave part 25 formed in the upper surface of the bottom plate 3 of the female part 13, and the convex part 17 has projections 27a, 27b, It can come into contact with at least one of 29a and 29b. By fitting the convex portion 17 into the concave portion 25, when a force in the tensile direction is applied to the connecting portion of the male portion 11 and the female portion 13, the convex portion 17 is prevented from coming into contact with the protrusions 29a and 29b and the connecting portion is removed. be able to. When the lid 41 is fixed to the trough body 1 with the convex portion 17 fitted in the concave portion 25, the convex portion 17 and the concave portion 25 are pressed from above and below, and the connecting portion of the trough does not come off.

As shown in FIGS. 10 and 11A, when connecting the trough bodies 1 to each other, the male part 11 is overlapped with the female part 13 from above, the bent part 15 is fitted into the groove part 23, and the convex part 17. Fits loosely into the recess 25. At this time, the length of the groove portion 23 in the trough longitudinal direction is larger than the length of the bent portion 15 in the trough longitudinal direction, the size of the convex portion 17 is smaller than the size of the concave portion 25, and the outer dimension E of the bent portion 15 is Since it is shorter than the inner dimension D of the groove part 23, as shown in FIG.11 (b), it can lay with an angle of about 10 degree | times (desirably 5 degrees or less) at maximum in a connection part. Moreover, since the dimension of the recessed part 25 is larger than the convex part 17 both in the width direction and the length direction so that the convex part 17 can be loosely fitted to the concave part 25, the trough body 1 When connecting each other, the trough bodies can be connected to each other by overlapping the male part 11 with respect to the female part 13 by shifting the position from front to back and from side to side and performing alignment.
Moreover, since the outer dimension of the bent part of the male part is formed larger than the inner dimension of the bent part of the female part, the connected troughs do not come out from each other.
In addition, in FIG.11 (b), although the case where it lays at an angle to a horizontal direction was illustrated, when it arrange | positions diagonally in the innermost part of the trough longitudinal direction of the groove part 23 at such an angle to a horizontal direction in this way However, the length in the trough longitudinal direction of the groove portion 23 is wider than the length in the trough longitudinal direction of the bent portion 15 so as to be loosely fitted. Furthermore, originally, it is desirable to flatten the top surface of the bottom plate 3 at the connecting portion so that no step is generated on the bottom surface 3 at the connecting portion between the trough bodies 1, but in the vertical direction according to the situation of the laying site. Can also be laid at some angle.

  Further, as shown in FIG. 11A, the end portion 30 of the male portion 11 of the first trough main body 1 is laid so as not to contact the main body portion 9 of the second trough main body 1. That is, before the end part 30 of the male part 11 contacts the main body part 9, the convex part 17 contacts the protrusions 27a and 27b. Since the end part 30 of the male part 11 is not in contact with the main body part 9, even when the trough main body 1 extends due to a temperature change, the trough main body 1 is not excessively stressed or deformed thereby.

  On the other hand, when the trough body 1 is extended in a state where the end portion 30 of the male portion 11 of the first trough body 1 is in contact with the body portion 9 of the second trough body, an excessive force is applied to the trough body 1, The connecting part of the trough may be deformed or damaged. Alternatively, the trough lid may float. In that case, mice and water may enter the trough, and the cable may be short-circuited.

  In the first embodiment, as shown in FIG. 11A and FIG. 13A, when laying, the convex portion 17 may be fitted into the concave portion 25 so as to contact the projections 27a and 27b. As shown in FIG. 13B, even if the trough body 1 extends due to a temperature change, the projections 27a and 27b absorb the force from the convex portion 17 and deform, so that an excessive force is applied to the trough body 1. Can prevent the trough from being damaged or deformed.

  More specifically, when the resin constituting the trough body 1 is made of a resin such as recycled resin including polyethylene and polypropylene and an inorganic filler, the trough body 1 is about 10 ° C. higher when it rises by 10 ° C. in a straight pipe having a length of 1 m. Extends 0.6mm. Therefore, when a temperature change of −20 ° C. to 60 ° C., which is around the temperature at which the trough is used, is assumed to be 80 ° C., the maximum elongation is about 4.8 mm. Therefore, when the trough body 1 is a straight pipe having a length of 1 m, the lengths of the protrusions 27a, 27b, 29a, and 29b need to be about 4.8 mm or more. Further, as shown in FIG. 11B, when connecting at an angle, each projection is provided with a margin of about 0.4 mm so that the end of the convex portion 17 does not contact the inner wall of the concave portion 25. The length of is preferably 5.2 mm or more.

  Thus, according to the first embodiment, since the male part 11 of the trough body 1 has the convex part 17 and the female part 13 has the concave part 25, the convex part 17 and the concave part 25 are fitted to each other. Two trough bodies 1 can be connected.

Further, according to the first embodiment, by providing the protrusions 27a, 27b, 29a, and 29b in the concave portion 25, even when the trough body 1 expands and contracts due to heat due to a change in environmental temperature at the laying place, the protrusions By deforming, the stress can be relaxed, and it is possible to prevent the trough body 1 from being deformed by avoiding excessive force applied to the trough body 1.
As shown in FIG. 11B, even when laying at an angle in the horizontal direction, the inner dimension of the groove of the female part 23 is larger than the outer dimension of the bending of the male part 15, and Since the length in the longitudinal direction of the groove portion is larger than the length in the longitudinal direction of the bent portion 15 of the male portion , the trough fitting portion is caused by a change in environmental temperature. Even if the trough moves away from each other, it is designed so that the bent portion 15 on the side surface of the female portion of the trough body 1 can be sufficiently prevented from being expanded or pulled.

(Another example of the female portion 13 according to the first embodiment)
Various modifications can be made to the recess 25 and the protrusion of the female portion 13. FIG. 14 is an enlarged perspective view of another example of the female portion 13. FIG. 15 is a cross-sectional view for explaining the connection between the male part 11 and another example of the female part 13, and corresponds to the GG cross section of FIG. FIG. 16 is an enlarged plan view of another example of the female portion 13.

As shown in FIG. 14, projections 33 a and 33 b are provided on the step portion 19 at the boundary between the main body portion 9 and the female portion 13 of the bottom plate 3. In FIG. 14, the protrusions 29a and 29b are different in height from the protrusions 33a and 33b, and the heights of the upper surfaces of the protrusions 29a and 29b substantially coincide with the heights of the bottom surfaces of the protrusions 33a and 33b. The protrusion 33a and the protrusion 29a, and the protrusion 33b and the protrusion 29b face each other. In that case, as shown in FIG. 15, the end 30 in the longitudinal direction of the bottom plate 3 of the male part 11 abuts against the protrusion 33 a (33 b). Further, when a tensile force acts on the connecting portion and the male portion 11 moves in the H direction, the convex portion 17 of the male portion 11 comes into contact with the projection 29a (29b) of the concave portion 25 of the female portion 13.

  In the example shown in FIG. 16A, the protrusions 35 a and 35 b provided on the step portion 19 of the bottom plate 3 of the female portion 13 extend to the concave portion 25. Further, as shown in FIG. 16B, the recess 25 may be provided at a position in contact with the main body 9, and the protrusions 37 a and 37 b may be provided on the recess 25.

(Second Embodiment)
Next, a second embodiment will be described.
FIG. 17 is an enlarged perspective view showing the male part 11a according to the second embodiment. 18A to 18C are plan views for explaining the connection between the female portion 13a and the male portion 11a according to the second embodiment. FIGS. 19A and 19B are diagrams for explaining deformation of the convex portion 17a.

  As shown in FIG. 17, the male part 11a has a convex part 17a that can be deformed by pressing. The convex portion 17a has a zigzag cross section and a space inside, and the convex portion 17 has a structure that is more trough than the convex portion 17 according to the first embodiment having a structure such as a simple rectangular parallelepiped filled with resin. It is easily deformed by the tensile and compressive forces acting between them.

  As shown in FIG. 18A, the female portion 13 a of the trough body according to the second embodiment does not have a protrusion on the concave portion 25 or the bottom plate 3. Since the size of the convex portion 17a is smaller than the size of the concave portion 25, the male portion 11a and the female portion 13a can be connected as shown in FIG. Further, as shown in FIG. 18C, an angle can be set at the connecting portion.

  In 2nd Embodiment, as shown to Fig.19 (a), you may make it fit so that the convex part 17a may contact the recessed part 25 at the time of laying. As shown in FIG. 19B, even if the trough body 1 is extended due to a temperature change, the convex portion 17a is deformed so as to absorb the stress when the trough body 1 is extended. You can avoid applying force.

  As described above, according to the second embodiment, the male part 11a of the trough body 1 has the convex part 17a that can be deformed by pressing, so that the trough main body can be provided without providing the concave part 25 or the bottom plate 3 with protrusions. Even when 1 expands and contracts due to heat, the convex portion 17a is deformed to relieve stress, and it is possible to avoid applying an excessive force to the trough body 1.

(Fixed structure of trough body and lid)
20A and 20B are a plan view and a side view of the lid 41. FIG. The lid 41 has mounting grooves 43 at both ends. Further, when the troughs are connected to each other, the male portion corresponding portion 44 of the lid 41 corresponding to the male portion 11 of the trough body 1 is covered with the female portion corresponding portion 45 of the lid 41 corresponding to the female portion 13. It is thinner than the main body 9. The lid 41 is placed on the trough body 1 shown in FIG.

  FIG. 21 is a perspective view of the metal band 51. The metal band 51 is a substantially U-shaped metal member. The metal band 51 is provided with a hole 53. A tool such as a flathead screwdriver can be inserted into the hole 53 to open the metal band 51 to the outside, and the trough can be removed from the fixed state. Further, the end portion of the metal band 51 is folded back, and an attachment portion 55 is formed.

  FIG. 22 is a perspective view of the trough 61 with the lid 41 attached to the trough body 1. In addition, illustration of the recessed part 25 etc. of the trough main body 1 is abbreviate | omitted in FIG. 23 is a cross-sectional view taken along the line II of FIG.

  As shown in FIGS. 22 and 23, after the trough body 1 is laid, the lid 41 is covered so as to cover the opening 6 of the trough body 1, and the metal band 51 is attached to the attachment groove 43 of the lid 41. The trough body 1 and the lid 41 are fixed.

  An attachment groove 43 for attaching the metal band 51 is provided on the upper surface of the lid 41. The attachment groove 43 is tapered from the center in the width direction of the lid 41 toward both sides in a direction perpendicular to the longitudinal direction of the lid 41. As shown in FIG. 23A, the thickness J of the trough body 1 and the lid 41 where the metal band 51 is attached is shorter than the length K of the side surface of the metal band 51. Therefore, when the upper part of the metal band 51 is pressed against the attachment groove 43 of the lid 41, the attachment part 55 of the metal band 51 comes below the receiving part 10 of the trough body 1. After that, as shown in FIG. 21 (b), when the pressing is stopped, the metal band 51 returns to the upward direction due to the spring property of the metal, so the attachment part 55 of the metal band 51 is the trough body. 1 receiving part 10 is engaged. Since the central portion 57 of the metal band 51 is in contact with the central top of the mounting groove 43, the metal band 51 presses the lid 41 against the trough body 1.

Thus, by providing the attachment groove 43 in the lid 41, the thickness J can be made shorter than the length K, the molding accuracy of the trough body 1 and the lid 41 is poor, and the thickness J varies. Even in this case, the attachment part 55 of the metal band 51 can be securely attached to the receiving part 10 of the trough body 1, and the metal band 51 is provided in the attachment groove 43, so that the metal band 51 may shift in the trough longitudinal direction. Absent.
The If the mounting groove 43 is not provided, the thickness J and the length K are substantially the same. If the forming accuracy of the trough body 1 and the lid 41 is poor, the metal band 51 may not be attached. 51 sometimes shifted in the trough longitudinal direction.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to such examples. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the technical idea disclosed in the present application, and these are naturally within the technical scope of the present invention. Understood.

  In particular, as long as the trough body 1 has the male part 11 and the female part 13, the shape of the trough is not limited to a straight pipe, and the main body part 9 is a tube that is curved horizontally or vertically, or a tube that branches into a T-shape or the like. There may be.

DESCRIPTION OF SYMBOLS 1 ......... Trough main body 3 ......... Bottom plate 5a, 5b ......... Side plate 6 ......... Opening part 9 ...... Main body part 10 ......... Reception part 11, 11a ......... Male part 13, 13a ......... Female part 15 ......... Bending part 17, 17a ......... Convex part 19 ......... Step part 21 ......... Female part bending part 23 ......... Groove part 24 ......... U-shaped part 25 ......... Recess part 27a , 27b ......... Protrusions 29a, 29b ......... Protrusions 30 ......... Ends 33a, 33b ......... Protrusions 35a, 35b ......... Protrusions 37a, 37b ......... Protrusions 41 ......... Cover 43 ......... Attachment Groove 51 ......... Metal band 53 ......... Hole 55 ......... Mounting portion 57 ......... Central portion 61 ......... Trough

Claims (12)

A trough body comprising a bottom plate and a pair of side plates and having an opening at the top;
A trough that covers the opening of the trough body and is connectable to each other,
A male part having a convex part formed on the lower side of the bottom plate at an end of the trough body;
A female portion having a recess formed on the upper side of the bottom plate at the other end of the trough body;
The male part has a bent part protruding at the tip of the outer surface of the side plate,
The female part has a groove part formed in the side plate, and a bent part protruding to the inner surface at the tip of the female part,
The inner dimension of the bent part of the female part is larger than the outer dimension of the side wall of the male part, the inner dimension of the groove part of the female part is larger than the outer dimension of the bent part of the male part, and is outside the bent part of the male part. The dimension is formed larger than the inner dimension of the bent part of the female part, and the length in the longitudinal direction of the groove part of the female part is larger than the length in the longitudinal direction of the bent part of the male part,
It is possible to connect the bent part of the male part obliquely with an angle to the groove part of the female part,
Furthermore, the dimension of the concave portion is formed larger than the convex portion in both the width direction and the longitudinal direction so that the convex portion can be fitted to the concave portion and can be moved back and forth and left and right.
The bent portion of the male portion can be fitted into the groove portion of the female portion and the bent portion of the female portion;
The trough characterized in that the convex part of the male part fits into the concave part of the female part and the trough main body is connected to each other.   A plurality of projections are provided in the concave portion formed on the upper side of the bottom plate of the female portion, and the convex portion formed on the lower side of the bottom plate of the male portion is capable of contacting the projection. The trough according to claim 1. A plurality of protrusions are provided on the bottom plate and the recess of the female part,
The bottom plate of the male part can contact the protrusion provided on the bottom plate of the female part,
The trough according to claim 1, wherein the convex portion is capable of contacting a protrusion provided in the concave portion.   The trough according to claim 1, wherein the convex portion formed on the lower side of the bottom plate of the male portion is deformable by pressing. The trough according to any one of claims 1 to 4 , further comprising an attachment groove for attaching a metal band for fixing the trough body and the lid on an upper surface of the lid.   A trough connection structure, wherein a plurality of troughs according to any one of claims 1 to 5 are connected to each other. The trough connection structure according to claim 6 ,
The stress acting on the trough due to the thermal expansion or contraction of the trough due to environmental temperature change is caused by either the protrusion formed on the female portion of the trough body or the deformation of the convex portion formed on the bottom plate of the male portion of the trough body. The trough coupling structure is characterized by preventing deformation of the coupling portion of the trough body by absorbing. A trough body comprising a bottom plate and a pair of side plates and having an opening at the top;
A trough that covers the opening of the trough body and is connectable to each other,
At the end of the trough body, a male part having a bent part protruding from the outer surface of the side plate, and a convex part formed on the lower side of the bottom plate,
At the other end of the trough body, it has a female portion having a groove formed on the side plate and a recess formed on the upper side of the bottom plate,
The male part has a bent part protruding at the tip of the outer surface of the side plate,
The female part has a groove part formed in the side plate and a bent part protruding to the inner surface at the tip of the female part ,
The female part has a groove part formed in the side plate, and a bent part protruding to the inner surface at the tip of the female part,
The inner dimension of the bent part of the female part is larger than the outer dimension of the side wall of the male part, the inner dimension of the groove part of the female part is larger than the outer dimension of the bent part of the male part, and is outside the bent part of the male part. The dimension is formed larger than the inner dimension of the bent part of the female part, and the length in the longitudinal direction of the groove part of the female part is larger than the length in the longitudinal direction of the bent part of the male part,
The dimension of the concave part is formed larger than the convex part in both the width direction and the longitudinal direction, and the convex part is fitted to the concave part and moved back and forth, and left and right, and the bent part of the male part The trough connecting method is characterized in that the trough body is connected to each other by fitting the convex portion into the groove portion of the female portion, the bent portion of the female portion, and the concave portion , respectively. And
Overlaying the male part of the second trough body on the female part of the first trough body;
Fitting the male bent portion of the second trough body to the groove portion of the female portion of the first trough body, and performing alignment;
Aligning the bottom plate of the first trough body and the bottom plate of the second trough body; and
Fitting the convex portion of the second trough body to the concave portion of the female portion of the first trough body, and performing alignment ;
A method of connecting troughs, comprising: A trough body comprising a bottom plate and a pair of side plates and having an opening at the top;
A trough that covers the opening of the trough body and is connectable to each other,
A male part having a convex part formed on the lower side of the bottom plate at an end of the trough body;
A female portion having a recess formed on the upper side of the bottom plate at the other end of the trough body;
The convex part of the male part fits into the concave part of the female part, and the trough bodies are connected to each other ,
A plurality of projections are provided in the concave portion formed on the upper side of the bottom plate of the female portion, and the convex portion formed on the lower side of the bottom plate of the male portion is capable of contacting the projection. Characteristic trough. A trough body comprising a bottom plate and a pair of side plates and having an opening at the top;
A trough that covers the opening of the trough body and is connectable to each other,
A male part having a convex part formed on the lower side of the bottom plate at an end of the trough body;
A female portion having a recess formed on the upper side of the bottom plate at the other end of the trough body;
The convex part of the male part fits into the concave part of the female part, and the trough bodies are connected to each other ,
A plurality of protrusions are provided on the bottom plate and the recess of the female part,
The bottom plate of the male part can contact the protrusion provided on the bottom plate of the female part,
The trough characterized in that the convex portion can come into contact with a protrusion provided in the concave portion . A trough body comprising a bottom plate and a pair of side plates and having an opening at the top;
A trough that covers the opening of the trough body and is connectable to each other,
A male part having a convex part formed on the lower side of the bottom plate at an end of the trough body;
A female portion having a recess formed on the upper side of the bottom plate at the other end of the trough body;
The convex part of the male part fits into the concave part of the female part, and the trough bodies are connected to each other ,
The trough characterized in that the convex part formed on the lower side of the bottom plate of the male part is deformable by pressing . A trough body comprising a bottom plate and a pair of side plates and having an opening at the top;
A trough that covers the opening of the trough body and is connectable to each other,
A male part having a convex part formed on the lower side of the bottom plate at an end of the trough body;
A female portion having a recess formed on the upper side of the bottom plate at the other end of the trough body;
In the trough connection structure in which the troughs are connected to each other, the convex part of the male part is fitted into the concave part of the female part, and the trough bodies are connected to each other .
The stress acting on the trough due to the thermal expansion or contraction of the trough due to environmental temperature change is caused by either the protrusion formed on the female portion of the trough body or the deformation of the convex portion formed on the bottom plate of the male portion of the trough body. The trough coupling structure is characterized by preventing deformation of the coupling portion of the trough body by absorbing.

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