JP5426977B2 - Grating using an end bar with a fitting groove - Google Patents

Description

  The present invention relates to a grating-like grating used as a cover or a floor board such as a side gutter of a road.

  The conventional grating 20 shown in FIG. 4 used as a cover for a side groove UA of a paved road is arranged in parallel with a plurality of bearing bars 11 having a rectangular cross section including an I-shape, and a cross bar 13 is abutted against the upper end side thereof. It is connected by welding to form a lattice window, and both end portions of the bearing bar 11 are connected by end bars 12, and rainwater and earth and sand on the road pass through the lattice window and fall into the side groove. Yes.

  Furthermore, even if a person, a car, or the like passes over the grating 20, it is necessary to maintain the bearing bar 11 in a state of being arranged in parallel at a predetermined interval. For this purpose, the contact point between the end bar 12 and both ends of the bearing bar 11 is welded, but the welding point 16 (not shown, but the welding point 16 is similarly provided on the back side of the grating 20). However, this is a time-consuming work and is inefficient and expensive to manufacture.

  The direction of the external force acting on the welded portion 16 between the end bar 12 and both ends of the bearing bar 11 when a person or an automobile passes over the grating 20 is roughly divided into the horizontal direction and the vertical direction of the bearing bar 11. However, since the external force in the vertical direction is supported by the grating receiving portion Ub, the welding is substantially sufficient to support the external force in the horizontal direction, which is excessive.

  Furthermore, when welding the bearing bar 11 to the end bar 12, the end bar 12 must be adjusted to an appropriate position with respect to the bearing bar 11, and welding must be performed while fixing at that position. It was troublesome.

  Therefore, Patent Document 1 proposes a grating in which a bent piece fitted between the end portions of the bearing bar is provided on the end bar. This is because the bearing bar is supported by a bent piece fitted between the ends of the bearing bar, can maintain the standing state, and can easily prevent the bearing bar from falling.

  However, in this Patent Document 1, it is possible to easily prevent the bearing bar from falling down and maintain the standing state, but in order to perform a small bending process, the problem is that the strength is insufficient due to the use of a thin plate. was there.

  Patent Document 2 proposes a grating in which engagement protrusions are provided at both ends of a bearing bar and an engagement hole is provided in a corresponding end bar. This is because all of the bearing bars including the unwelded bearing bars can be obtained by simply engaging and engaging the engaging protrusions with the engaging holes and welding the ends of some of the bearing bars. It could be firmly sandwiched and fixed between a pair of end bars. As a result, the assembly of the grating is easy, and the number of welding points is minimized, so that the manufacturing cost can be reduced.

However, in Patent Document 2, it is necessary to process the end portion of the bearing bar into an engagement protrusion shape so that it can be fitted into the engagement hole provided in the end bar. However, the bearing bar which is the subject of the present invention is cut to a desired length according to the use form, and the cross bar is connected to the upper end side by butt resistance welding. Due to the arrangement, it is very difficult to process the end portion of the bearing bar into an engagement protrusion so that the end of the bearing bar can be fitted into the engagement hole.
JP 2007-332741 A JP 2007-85143 A

  The present invention is intended to solve the above problem, and does not require separate processing of the end of the bearing bar, facilitates fixing between the bearing bar and the end bar, greatly reduces the number of welding points, and reduces production costs. The purpose is to provide a grating.

  The grating using the fitting groove end bar of the present invention is used as a lid for road side grooves, etc., and is arranged in parallel in a standing state with rectangular cross-section bearing bars, and crosses the upper end side of the bearing bar by butt resistance welding. It is a grating in which the cross bar is connected with a bar without protruding from the upper end surface of the bearing bar to form a lattice window, and both ends of the bearing bar are connected with an end bar.

Grating using fitting grooved end bar of the present invention, further addition to the above configuration, the bearing bar side of the surface of the end bar, the groove end faces of the bearing bars are press-fitted is provided.

  With the above configuration, the end surface of the bearing bar is press-fitted into the groove, and the bearing bar and the end bar are firmly fixed without rattling. Therefore, the bearing bars can be maintained in a state of being arranged in parallel with a predetermined interval only by the fixing. Conventionally, welding was performed on all contact points between the bearing bar and the end bar (see FIG. 4). However, according to the above configuration, only a few points need be welded in addition to fixing by press-fitting.

  As described above, the end bar is provided with a fitting groove, so as long as the end surface of the bearing bar is fitted into the fitting groove, the end bar and the bearing bar can be aligned with each other, and the position can be finely adjusted manually. There is no need to do. Therefore, the grating can be easily assembled and the production cost can be reduced. Further, since the end bar according to the present invention is not particularly processed except for providing a fitting groove in the conventional end bar, the conventional end bar can be used as it is, and the strength can be sufficiently practically used in terms of strength.

  Further, in the grating using the fitting groove end bar of the present invention, the shape of the fitting groove is such that the width of the bottom surface of the fitting groove is equal to or less than the maximum width of the end surface of the bearing bar, and the width of the opening of the fitting groove is the bearing. The side surface of the fitting groove that is equal to or larger than the maximum width of the end surface of the bar and continues to the corner portion of the bottom surface and the edge portion of the opening portion has at least a portion in which the side surface width facing from the opening portion toward the bottom surface is narrowed. doing.

  As described above, since the opposing width of the side surface of the fitting groove is narrowed from the opening toward the bottom surface, fitting the end surface of the bearing bar into the fitting groove is easy and The end face of the bearing bar is pressed into the fitting groove, and a strong fixing force is generated.

Also, when fitting the end face of the bearing bar to the fitting groove, a force banging opposite surface of the bearing bar end bars with a hammer, but gradually pressed, the side surface of the fitting groove Since the opposing width of the aperture narrows from the opening toward the bottom, the force required for press-fitting gradually increases, so that press-fitting can be easily performed without difficulty.

  The side portion of the fitting groove where the fixing force is generated is a portion that contacts the end surface of the bearing bar, and at least the width of the contacting side surface is narrowed. The side surface shape of the groove can be arbitrary.

  Furthermore, since the width of the bottom surface of the fitting groove is less than or equal to the maximum width of the end surface of the bearing bar, the end surface of the bearing bar having the maximum width becomes the fitting groove regardless of the shape of the end surface of the bearing bar. If it is press-fitted, a fixing force is always generated. Therefore, it is not necessary to separately process the end face of the bearing bar in accordance with the shape of the fitting groove.

  In addition, even if there is a gap between the linear groove and the I-type bearing bar, the plating solution penetrates into the gap and hardens when plating, and acts as an adhesive. On the contrary, the coupling between the end bar and the bearing bar is improved.

  In addition to the above configuration, in the grating using the fitting end groove with the fitting groove of the present invention, the edge of the opening is formed by chamfering.

  Thus, when the end face of the bearing bar is press-fitted into the fitting groove, the end face of the bearing bar is in contact with the edge of the opening even if the end face of the bearing bar is slightly displaced from the edge of the opening. It becomes easy to be guided toward.

  As described in the above solution.

An example of the grating using the end bar with the fitting groove of the present invention is shown, (a) is a diagram in which the end bar and the bearing bar are separately arranged, (b) is the fitting bar of the end bar, the end surface of the bearing bar, FIG. 4C is a diagram showing a part of the welded portion in FIG. It is the figure which installed the grating using the end bar with a fitting groove | channel of FIG. 1 in the side groove. FIGS. 1A and 1B show an essential part of the grating using the end bar with the fitting groove of FIG. 1, (a) is a top view of the fitting groove of the end bar, and (b) is a diagram in which the end surface of the bearing bar faces the fitting groove; ) Is a diagram in which the end surface of the bearing bar is press-fitted from the state of (b), (d) is a diagram in which the end surface of the bearing bar is diagonally facing the fitting groove, and (e) is a state of (d). FIG. 5F is a view showing the end face of the bearing bar press-fitted and FIG. 8F is a view showing another example of forming the fitting groove. It is the figure which has installed the conventional grating in the side groove.

  Embodiments of the present invention will be described below with reference to the drawings.

Embodiment 1

  1A and 1B show an example of a grating using an end bar with a fitting groove according to the present invention. FIG. 1A is a diagram in which an end bar and a bearing bar are separately arranged, and FIG. The figure press-fitted into the fitting groove, and (c) is an enlarged view of a part of the welded part of (b).

As shown in FIG. 1A, the bearing bars 1 are arranged in parallel in a standing state, and the upper end side of the bearing bar 1 is crossbar 3 and the crossbar 3 is connected to the bearing bar 1 by butt resistance welding. A lattice window is formed by connecting the upper end face without protruding from the upper end surface. Further, the end bar 2, on the surface of the bearing bars 1 side, the fitting groove 5 the end face of the bearing bar 1 is press-fitted is at the same interval as the ordered spacing of the bearing bars 1, provided with a plurality Yes.

  An arrow is attached between the bearing bar 1 and the end bar 2. The end bar 2 is brought close to the direction of the arrow, and the end face 1 a of the bearing bar 1 is press-fitted into the corresponding fitting groove 5.

  FIG. 1B shows a state in which only a few places are welded after being press-fitted and fitted as described above. Since the end face 1a of the bearing bar 1 is press-fitted into the fitting groove 5, a strong fixing force is generated by itself, and even if a horizontal force is applied from the outside, the bearing bars 1 are arranged in parallel. The maintained state can be sufficiently maintained. Further, the welding is not performed in order to maintain the state in which the bearing bars 1 are arranged in parallel, but to prevent the connecting body of the bearing bar 1 and the cross bar 3 from coming off from the end bar 2 to the last. is there. Therefore, it is not necessary to weld all the contact points between the bearing bar 1 and the end bar 2, the welding points 6 can be greatly reduced, the assembly of the grating is easy, and the manufacturing cost is reduced.

  FIG. 1C shows the welded portion 6 in an enlarged manner. Here, although the welding location 6 is exaggerated, this is for easy recognition of the welding location 6 and is not different from ordinary welding performed by those skilled in the art.

  FIG. 2 is a diagram in which the grating using the end bar with the fitting groove of FIG. 1 is installed in the side groove. From here on, the same parts as those already described are denoted by the same reference numerals, and redundant description is omitted. The grating 10 is installed so as to be supported on the grating receiving portion Ub in the side groove UA. As described above, the vertical external force acting on the grating 10 is supported by the grating receiving portion Ub.

Embodiment 2

  FIG. 3 shows the main part of the grating using the end bar with the fitting groove of FIG. 1, (a) is a top view of the fitting groove of the end bar, and (b) is the end face of the bearing bar facing the fitting groove. (C) is a view in which the end surface of the bearing bar is press-fitted from the state of (b), (d) is a view in which the end surface of the bearing bar is diagonally facing the fitting groove, and (e) is (d). It is the figure where the end surface of the bearing bar was press-fitted from the state.

  As shown in FIG. 3A, the fitting groove 5 has an opening 5a, a side surface 5b, an edge 5c of the opening 5a, a bottom surface 5d, and a corner 5e of the bottom surface 5d. And the fitting groove 5 of the said shape is continuing from the upper surface of the end bar 2 to the lower surface.

  In FIG. 3B, the end surface 1 a of the bearing bar 1 faces the fitting groove 5. The width of the bottom surface 5d of the fitting groove 5 is equal to or smaller than the maximum width of the end surface 1a of the bearing bar 1, and the width of the opening 5a of the fitting groove 5 is equal to or larger than the maximum width of the end surface 1a of the bearing bar 1. Further, the side surface 5b of the fitting groove 5 that is continuous with the corner 5e of the bottom surface 5d and the edge 5c of the opening 5a has a narrow side surface width facing the bottom surface 5d from the opening 5a. . Further, the edge 5c of the opening 5a is chamfered.

  The end surface 1a of the bearing bar 1 has a return 1b. This occurs when the bearing bar 1 is cut to a desired length during the manufacturing process. When actually press-fitting, the end surface 1a of the bearing bar 1 is brought close to the opening 5a of the fitting groove 5, and the surface of the end bar 2 opposite to the end surface 1a of the bearing bar 1 is struck with a hammer or the like. Apply force and press.

  At that time, since the width of the opening 5a of the fitting groove 5 is equal to or larger than the maximum width of the end surface 1a of the bearing bar 1, the position of the end surface 1a of the bearing bar 1 is set to the opening 5a of the fitting groove 5 when press-fitting. It becomes easy to match. Further, since the opposing width of the side surface 5b of the fitting groove 5 is narrowed from the opening 5a toward the bottom surface 5d, the force necessary for the press-fitting gradually increases, so that the press-fitting can be easily and easily performed. I can do it.

  (C) of FIG. 3 is the figure by which the end surface 1a of the bearing bar 1 was press-fitted and fitted from the state of (b). It can be seen that the end face 1a of the bearing bar 1 is deformed so as to follow the shape of the fitting groove 5 by press-fitting, and a strong fixing force is generated. Further, there is a black portion near the left end of the bottom surface 5d of the fitting groove 5. This is because the return 1b is also pressed and crushed together, and a stronger fixing force is generated. Thus, due to the shape of the fitting groove 5 described above, the return 1b that is unnecessary and should be removed contributes to an increase in the fixing force.

  FIG. 3D is a view in which the end face 1 a of the bearing bar 1 faces the fitting groove 5 obliquely. This is because the end surface 1a of the bearing bar 1 is distorted by butt resistance welding or the like of the cross bar 3 during the manufacturing process. When press-fitting and fitting, the left end of the end surface 1 a of the bearing bar 1 is in a positional relationship in contact with the edge 5 c of the opening 5 a of the fitting groove 5. Then, when the end surface 1a of the bearing bar 1 is brought close to the opening 5a of the fitting groove 5 and press-fitted with force, the opening of the fitting groove 5 in which the left end of the end surface 1a of the bearing bar 1 is first chamfered. The edge 5c contacts the edge 5c of the portion 5a, then contacts the side surface 5b of the fitting groove 5, and the end surface 1a of the bearing bar 1 is corrected rightward.

  (E) of FIG. 3 is the figure by which the end surface 1a of the bearing bar 1 was press-fitted and fitted from the state of (d). The end surface 1a of the bearing bar 1 is deformed so as to follow the shape of the fitting groove 5 by press-fitting, and a strong fixing force is generated. Furthermore, since the end surface 1a of the bearing bar 1 is corrected to the right side, a restoring force that causes the end surface 1a of the bearing bar 1 to return to the left side is generated, and the fixing force with the fitting groove 5 is increased.

  As described above, even if there is a return 1b of the end surface 1a of the bearing bar 1 generated in the manufacturing process and deformation such as distortion, the end surface 1a of the bearing bar 1 does not need to be treated separately, but rather by the return 1b. A strong fixing force can be generated and distortion can be corrected.

  The fitting groove 5 of the present invention can be formed by cutting, extrusion molding, press working, laser, wire cutting or the like. Further, by pressing a convex mold having a width equal to or less than the maximum width of the end face 1a of the bearing bar 1 and arranged at a constant interval onto the end bar 2, as shown in FIG. It is also possible to provide a fitting groove 5 </ b> A formed by projecting. Therefore, the edge 5c ′ of the opening 5a can be shaped like a chamfer. Further, according to this concave groove 5A, a sufficient fitting length can be secured by the protruding portion without increasing the thickness of the end bar, and the protruding portion is formed as much as the concave portion is formed. It is possible to press-mold without difficulty and reduce processing distortion.

  If the end surface 1a of the bearing bar 1 is I-type as in the above-described embodiment, the side surface 5b of the fitting groove 5 that is press-fitted and generates a fixing force is an upper portion and a lower portion that are I-type protruding portions. It becomes the side part in contact with. For this reason, it is sufficient that the portion where the width of the opposite side surface is narrowed is only at least a portion in contact with the portion where the I-type is present, and such a fitting groove shape is also included in the scope of the present invention.

  Further, the scope of the present invention includes the shape of the fitting groove 5 formed from the opening 5a and the bottom surface 5d having the same width as the maximum width of the end surface 1a of the bearing bar 1, and even if the shape is the return 1b The effect of the present invention can be obtained in the same manner by press-fitting the end face 1a of the bearing bar 1 having a fitting into the fitting groove 5.

  In addition, the grating using the fitting grooved end bar of the present invention is not limited to the above-described examples, and various modifications and combinations are possible within the scope of the claims and the scope of the embodiments. These modifications and combinations are also included in the scope of the right.

  Grating using an end bar with a fitting groove according to the present invention facilitates assembly of the grating, eliminates the need to separately process the end face of the bearing bar, and is used in industrial fields where it is required to reduce the manufacturing cost by reducing the number of welding points. For example, it can be used as a floor cover for a groove cover, a clean room, a multi-storey parking lot, or a step board for stairs.

DESCRIPTION OF SYMBOLS 1 Bearing bar 1a End surface 1b Return 2 End bar 3 Cross bar 5, 5A Fitting groove 5a Opening part 5b, 5b 'Side surface 5c, 5c' Edge part 5d Bottom face 5e Corner part 6 Welding point 10 Grating 11 Bearing bar (conventional)
12 End bar (conventional)
13 Crossbar (conventional)
16 Welding points (conventional)
20 Grating (conventional)
UA Side groove Ub Grating receiving part

Claims (3)

Used as a cover for road side grooves, etc., arranged in parallel with a rectangular cross-section bearing bar upright, butt resistance welding, the upper end side of the bearing bar is crossbar and the crossbar is from the upper end surface of the bearing bar It is a grating in which lattice windows are formed by connecting without projecting, and both ends of the bearing bar are connected by end bars,
Wherein said bearing bar side of the surface of the end bar, the grating using fitting grooved end bar end faces of the bearing bars, characterized in that the fitting fitting groove engaged are provided press-fitting. The shape of the fitting groove is such that the width of the bottom surface of the fitting groove is not more than the maximum width of the end surface of the bearing bar, and the width of the opening of the fitting groove is not less than the maximum width of the end surface of the bearing bar,
The side surface of the fitting groove continuous to the corner portion of the bottom surface and the edge portion of the opening portion has at least a portion with a narrow side surface width facing the bottom surface from the opening portion. Grating using an end bar with a fitting groove.  The grating using the end bar with a fitting groove according to claim 1 or 2, wherein the edge of the opening is formed by chamfering.

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