JP2010229695A - Grating - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grating which makes a side end of a main bar and a side bar joined together by caulking, and while reducing production costs. <P>SOLUTION: A joining protrusive edge 5 with a length falling within the range of the thickness of the side bar 3 is protrusively formed at the side end of the main bar 2 after expansive deformation working. Joining openings 6, which comprise an fit-in opening 7 undergoing the fitting of the joining protrusive edge 5 of the main bar 2 and a dent portion 8 continuously formed at the opening edge of the fit-in opening 7 and opened on the outside surface of the side bar 3, are formed at predetermined spacings in the longitudinal direction of the side bar 3, on the rectangular cross-section tie plate-like side bar 3. The end of the joining protrusive edge 5 is pressurized by a pressure member 9 in the state of fitting the joining protrusive edge 5 into each fit-in opening 7; and the main bar 2 and the side bar 3 are joined together by means of an expansively deformed portion 11 which is expansively deformed with a width equal to/greater than the width of the fit-in opening 7 in the dent portion 8 of the joining opening 6. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a metal grating used by being attached to a side groove or the like.

  As shown in FIG. 18, the metal grating a forms a lattice frame d by passing an appropriate number of long crossbars c orthogonally to a plurality of short main bars b arranged in parallel at predetermined intervals. Further, there is known one in which side bars e are arranged on both side edges along the longitudinal direction of the lattice frame d (see, for example, Patent Document 1).

  In such a conventional grating a, the side bar e and the plurality of main bars b constituting the lattice frame d are joined by joining the side end portions of the main bars b to the inner side surface of the side bar e by welding s. However, in such a joining means by welding, there is a problem that distortion due to heat occurs and the dimensional accuracy is lowered, or the appearance is deteriorated when the welded portion is visually observed. is there.

  Therefore, as a joining means instead of welding, as shown in FIG. 19 (A), a fitting portion f having protrusions g, g is formed at the end of each main bar b, while the side bar h The fitting holes j into which the fitting portions f can be inserted are formed at predetermined intervals along the longitudinal direction of the side bar h, and the fitting portions f are inserted into the respective fitting holes j as shown in FIG. Then, as shown in FIG. 19 (C), each of the main bar b and the side bar as shown in FIG. 19 (D) is obtained by caulking the protrusions g, g protruding from the fitting hole j from the outer surface side. A joining means for joining h has been proposed (see, for example, Patent Document 2).

Japanese Patent Laid-Open No. 6-47561 (conventional technology, FIGS. 4 and 5) JP 2005-68945 A

  By the way, since the grating is used by being housed in a pair of receiving frames disposed on both sides of the upper edge portion such as a side groove, it is not preferable that there is a projection on the outside of the side bar h. ), If a grating having protrusions g ′ and g ′ is manufactured, the interval t between the vertical edge n of the receiving frame m and the side bar h is widened, which causes a problem that dust or the like tends to accumulate. It becomes. For this reason, in the side bar h used for the joining means by caulking as in Patent Document 2, the portions g ′ and g ′ in which the protrusions g and g are caulked do not protrude to the outside of the side bar h. The thickness of the intermediate portion in the vertical direction of the bar h is reduced, and a recess p (see FIG. 19A) is provided on the outer surface side. As shown in FIG. 19D, the crimped portion in the recess p A plate material having a U-shaped cross section that can accommodate g ′ and g ′ is used.

  However, when a plate material having a U-shaped cross-section as described above is used for the side bar h, such a special-shaped plate material is not commercially available as an off-the-shelf product, and even when it is manufactured in-house, a special order is made to the steel material manufacturer. Even in this case, it is necessary to separately manufacture an expensive mold for molding, and the maintenance of the mold is also costly. Therefore, the cost of the side bar h using such a specially shaped plate is increased, and accordingly the grating is performed. There was a problem that the production cost of this would also increase.

  The present invention has been made in order to eliminate such problems, and by making it possible to use a strip plate having a rectangular cross section, which is commercially available as an inexpensive off-the-shelf product, as a base material for a side bar, the production cost can be reduced. The object is to provide a grating that can be reduced.

  The present invention relates to a grating comprising a plurality of metal main bars arranged in parallel at a predetermined interval and a metal side bar that is passed along the side end of each main bar. A joint projection edge having a length that fits within the wall thickness of the side bar after the expansion deformation process is formed on the side portion, while the joint projection edge of the main bar is formed on the side plate having a rectangular cross section. A joining mouth portion is formed at a predetermined interval along the longitudinal direction of the side bar, the fitting mouth portion including a fitting opening to be inserted and a hollow portion that is continuous with a mouth edge of the fitting opening and opens to the outer side surface of the side bar. The joint protrusion is inserted into each insertion opening, and the end of the connection protrusion is pressurized with a pressurizing member so as to expand and deform beyond the lateral width of the insertion opening in the recess of the connection opening. Grace characterized in that the main bar and the side bar are joined by the open deformation part. It is grayed.

  Here, the joining projecting edge projecting at the side end portion of the main bar projects at the middle position in the vertical direction of the side end portion of the main bar, or a pair at the upper and lower end positions of the side end portion of the main bar. In the case where the joining projection edge is projected at an intermediate position in the vertical direction of the main bar, a bonding mouth portion is formed at the intermediate position in the vertical direction of the side bar, When a pair of joining protrusion edges are formed at the upper and lower end positions of the end portion, a pair of joining ports are formed at the upper and lower end edges of the side bar. In addition, a punch-like pressure member having a conical sharp end at the tip can be suitably used as the pressure member that expands and deforms the end of the joining projection edge.

  Further, in the grating, a configuration is proposed in which the hollow portion has a conical shape in which the opening becomes wider toward the outer side surface of the side bar. Here, the recess can be a truncated cone shape or a truncated pyramid shape.

  Furthermore, a configuration is proposed in which the main bar is roll-formed, so that two joining protrusions are stacked in the thickness direction.

  In the present invention, as described above, the side edge of the main bar is formed with a joining projection edge having a length that fits within the thickness of the side bar after the expansion deformation process, while the band plate shape having a rectangular cross section A side opening of the main bar having a fitting opening into which the joining edge of the main bar is fitted, and a depression opening formed on the outer edge of the side bar. It is formed at a predetermined interval along the longitudinal direction of the sidebar, and a joining projection edge is inserted into each fitting entrance, and the end of the joining projection edge is pressed with a pressure member to form a depression in the joining mouth portion. Since the main bar and the side bar are joined by the expansion deformed part that has been expanded and deformed more than the lateral width of the fitting opening in the part, the strip material with a rectangular cross section that is commercially available as a ready-made product at a low price is used. It can be used for a substrate. Thereby, compared with the case where the board | plate material of the special shape which is not in the conventional ready-made product is used, the cost of a sidebar becomes cheap and it can reduce the production cost of grating.

  Further, in the configuration in which the hollow portion has a conical shape in which the opening widens as it reaches the outer side surface of the side bar, the outer surface of the expanding deformation portion obtained by expanding and deforming the end portion of the joining projection edge, By contacting the outer surface of the conical depression, the bonding strength can be further improved.

  Furthermore, when the main bar is roll-formed, the joining protrusions are stacked in the thickness direction. The edge of the edge can be easily expanded and deformed.

It is a top view of grating 1 concerning the present invention. The main bar 2 used for a 1st Example is shown, (A) is a front view, (B) is a side view, (C) is a top view. It is side sectional drawing of the main bar base material of various shapes. The sidebar 3 used for a 1st Example is shown, (A) is a front view, (B) is a vertical side view, (C) is a cross-sectional plan view. The other shape-formed hollow part 8 formed in the side bar 3 is shown, (A) is the front view of the side bar 3 provided with the truncated pyramid-shaped hollow part 8, (B) is the cross-sectional plan view, (C ) Is a front view of the side bar 3 provided with the recessed portion 8 formed of a recessed portion that is vertically depressed, and (D) is a cross-sectional plan view thereof. 4 is a partial perspective view of the main bar 2, the side bar 3, and the pressure member 9. FIG. FIG. 4 is a cross-sectional view of a main part showing a joining process of the main bar 2 and the side bar 3. It is explanatory drawing which shows the joining state of the main bar 2 and the side bar 3. FIG. The main bar 2 used for the modification of a 1st Example is shown, (A) is a front view, (B) is a side view, (C) is a top view. It is a transverse cross section of the important section showing the joining process of main bar 2 and side bar 3 in a modification. It is explanatory drawing which shows the joining state of the main bar 2 and the side bar 3 in a modification. The main bar 2 used for a 2nd Example is shown, (A) is a front view, (B) is a side view, (C) is a top view. The side bar 3 used for a 2nd Example is shown, (A) is a front view, (B) is a vertical side view, (C) is a top view. The hollow part 8 of the other shape formed in the side bar 3 of 2nd Example is shown, (A) is a front view of the side bar 3 provided with the truncated pyramid-shaped hollow part 8, (B) is the crossing. The top view, (C) is a front view of the sidebar 3 provided with the hollow part 8 which consists of the recessed part which dents perpendicularly, (D) is the cross-sectional plan view. It is a fragmentary perspective view of the main bar 2, the side bar 3, and the pressurization member 9 in a 2nd Example. It is explanatory drawing which shows the joining process of the main bar 2 and the side bar 3 in a 2nd Example. It is explanatory drawing which shows the joining state of the main bar 2 and the side bar 3 in 2nd Example, (A) is a cross-sectional top view, (B) is a front view of the principal part. It is a top view of the conventional grating a. It is explanatory drawing of the joining means by the crimping of the conventional main bar b and the side bar h. (A) is explanatory drawing of the use condition of the grating which provided the recessed part p in the outer surface side of the side bar h, (B) is explanatory drawing of the use condition of grating which has protrusion g ', g' in the outer side of the side bar h. It is.

  A first embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the grating 1 according to the present invention includes a plurality of main bars 2 arranged in parallel at predetermined intervals, and two side bars 3 that are respectively passed along both side end portions of each main bar 2. 3 and two crossbars 4, 4 that are orthogonally passed to each main bar 2 between both end portions of each main bar 2. One of steel, stainless steel, and aluminum is used as a metal material constituting these main bar 2, side bar 3, and cross bar 4.

  As shown in FIG. 2, the main bar 2 has a long main bar base material composed of a T bar (see FIG. 2B) formed into a substantially T-shaped section by roll forming, and has a short predetermined length. It is cut into pieces. At the side end of each main bar 2, a joining protrusion 5 having a length that fits within the thickness of the side bar 3 after the expansion deformation process described later is provided at an intermediate position in the vertical direction of the side end of the main bar 2. It projects from the side to the side. The joining projection edge 5 is formed in a rectangular shape by punching with a press, and the main bar 2 is formed by roll forming, so that the joining projection edge 5 is formed as shown in FIG. Are stacked in the thickness direction.

  The main bar 2 is a solid T-bar (see FIG. 3A) or a cross section formed into a substantially T-shaped cross section by pultrusion instead of the main bar base material formed by roll forming as described above. An oblong flat flat bar (see FIG. 3 (B)) or a substantially I-shaped I-bar (see FIG. 3 (C)) with wide portions at both upper and lower ends can be used as the main bar base material. It is.

  On the other hand, as shown in FIG. 4, the side bar 3 is a long band obtained by cutting a side bar base material composed of a flat flat bar formed into a vertically long rectangular section by rolling or drawing to a predetermined length. It is in the form of a plate, and a commercially available ready-made product is used for the side bar base material. The side bar 3 is formed at an intermediate position in the vertical direction with a fitting inlet 7 into which the joining projection edge 5 of the main bar 2 is fitted, and an edge of the fitting inlet 7. A plurality of joining ports 6 having depressions 8 opened on the side surfaces are formed at predetermined intervals along the longitudinal direction of the sidebar 3. Here, the fitting opening 7 of each joint opening 6 is a rectangular hole that is slightly larger than the longitudinal cross-sectional shape of the joint protrusion 5, and the recess 8 widens as it reaches the outer surface of the side bar 3. It has a truncated cone shape. The insertion opening 7 and the depression 8 are formed on the side bar 3 by punching the fitting 7 and forging the depression 8 at the same time by one press. As a result, the dimensional accuracy can be easily obtained, and the forming process can be easily performed.

  As shown in FIGS. 5 (A) and 5 (B), the recess 8 has a truncated pyramid shape in which the opening widens toward the outer surface of the side bar 3, or FIGS. 5 (C) and 5 (D). As shown in (), it is also possible to form a recess that is recessed perpendicularly to the outer surface of the side bar 3.

  Next, a procedure for joining the main bar 2, the side bar 3, and the cross bar 4 will be described. First, a plurality of main bars 2 are held in parallel at predetermined intervals. This parallel operation can be performed by a jig having a known configuration that is used when assembling a general grating. Then, the cross bar 4 is inserted into the connection hole (not shown) formed in each main bar 2, and the notch groove (not shown) formed in the cross bar 4 matches the connection hole of each main bar 2. In this state, the main bar 2 and the cross bar 4 are joined by rotating the cross bar 4 by approximately 45 ° using an appropriate jig. The joining means of the main bar 2 and the cross bar 4 is disclosed in Japanese Patent No. 3889517 relating to the invention of the applicant of the present application, and is not the gist of the present invention, so detailed description thereof is omitted.

  And the side bars 3 and 3 are joined to the both ends of each main bar 2 assembled | attached with the cross bar 4 as mentioned above. This joining is performed as follows. That is, as shown in FIG. 7 (A), the connecting projection edge 5 protruding from the side end portion of the main bar 2 is inserted into the insertion port 7 of the bonding port portion 6 formed in the side bar 3. In this inserted state, as shown in FIG. 7B, the end of the joining projection edge 5 is pressurized with the pressure member 9. Here, the pressurizing member 9 is a punch having a cone-shaped sharp end 10 at the tip, and the joining projection edge 5 in which the two cone-shaped sharp ends 10 are stacked in the thickness direction. By fitting into the overlapping portion, the end of the joining projection edge 5 is expanded and deformed in the recess portion 8 to be larger than the lateral width of the fitting entrance 7. As a result, as shown in FIGS. 7C and 8, the main bar 2 is formed by the expanding deformation portion 11 in which the end portion of the joining projection edge 5 is expanded and deformed in the recess portion 8 to be larger than the lateral width of the fitting entrance 7. And the side bar 3 can be joined.

  As described above, according to the configuration of the first embodiment, on the side end portion of the main bar 2, the joining protrusion edge 5 having a length that fits within the thickness of the side bar 3 after the expansion deformation process is formed, A strip-shaped side bar 3 having a rectangular cross section is formed with a fitting inlet 7 into which the joining projection edge 5 of the main bar 2 is fitted, and an opening at the outer surface of the side bar 3. In the state in which the joining port portion 6 including the recessed portion 8 is formed at predetermined intervals along the longitudinal direction of the side bar 3, and the joining projection 5 is fitted in each fitting inlet 7, the joining projection edge is provided. The main bar 2 and the side bar 3 and the side bar 3 are pressed by the expanding and deforming portion 11 which is pressurized with the pressing member 9 and is expanded and deformed in the hollow portion 8 of the bonding port 6 to the width of the fitting opening 7 or more. As a result, it is possible to use a strip material with a rectangular cross section, which is commercially available as an off-the-shelf product, as a base material for the sidebar 3. That. Thereby, compared with the case where the board | plate material of the special shape which is not in the conventional ready-made product is used, the cost of the sidebar 3 becomes cheap and the production cost of the grating 1 can be reduced.

  Moreover, when the said recessed part 8 is made into the cone shape from which an opening becomes wide as it goes to the outer side surface of the side bar 3, the outer surface of the expansion deformation | transformation part 11 which carried out the expansion deformation of the edge part of the protrusion 5 for joining However, when it hits the outer surface of the conical recess 8, the bonding strength can be further improved.

  Further, when the joining projection edge 5 is formed in a two-layer shape in the thickness direction by using the main bar 2 formed by roll forming, the pressure member 9 is inserted into the overlapping portion so that the joining protrusion 5 is inserted. The expansion deformation of the edge part of the edge 5 can be performed easily.

  9 to 11 show a modified embodiment of the first embodiment. In this modified embodiment, the main bar 2 is constituted by a solid T-bar (see FIG. 3A) formed in a substantially T-shaped cross section. In addition, a solid joining projection edge 5 projects from the side end of the main bar 2. In addition, about the component which is common in 1st Example, the code | symbol same as 1st Example is attached | subjected and duplication description is abbreviate | omitted.

  In such a configuration, in order to join the main bar 2 and the side bar 3, as shown in FIG. 10 (A), the main bar is inserted into the fitting opening 7 of the joining port 6 formed in the side bar 3. 2 is inserted, and as shown in FIG. 10 (B), the end of the joining projection 5 is formed by a punch-like pressure member 9 having a conical sharp end 10 at the tip. By pressurizing the portion and causing the member to flow, the end portion is expanded and deformed in the recessed portion 8 to be larger than the lateral width of the fitting entrance 7. Accordingly, as shown in FIGS. 10C and 11, the main bar 2 is formed by the expanding deformation portion 11 in which the end portion of the joining projection edge 5 is expanded and deformed in the recess portion 8 to be larger than the lateral width of the fitting entrance 7. And the side bar 3 can be joined.

  12 to 17 show a second embodiment. In the second embodiment, as shown in FIG. 12, a pair of upper and lower joining projection edges 5a and 5b is located on the side from the vertical position of the side end of the main bar 2. As shown in FIG. It is erected toward the direction. The joining projection edges 5a and 5b have a length that can be accommodated within the thickness of the side bar 3 after the expansion deformation process. As in the first embodiment, a T bar (see FIG. 12B) formed in a substantially T-shaped cross section by roll forming is used for the base material of the main bar 2, as shown in FIG. As described above, each of the joining projection edges 5a and 5b is overlapped in the thickness direction.

  In addition, as another base material of the main bar 2, the solid T-bar (see FIG. 3A) shown in FIG. 3, a flat flat bar with a vertically long rectangular cross section (see FIG. 3B), or It is also possible to use a pultruded material such as an I-bar having a substantially I-shaped cross section (see FIG. 3C) having wide portions at both upper and lower ends.

  On the other hand, as shown in FIG. 13, the side bar 3 is coupled to the fitting inlet 7 into which the joining protrusion edges 5 a and 5 b of the main bar 2 are fitted at both the upper and lower edges, and the mouth edge of the fitting inlet 7. In addition, a pair of upper and lower joining ports 6 a and 6 b provided with a recessed portion 8 opened on the outer surface of the side bar 3 are formed at predetermined intervals along the longitudinal direction of the side bar 3. Here, the fitting inlets 7 of the respective joining ports 6 a and 6 b are grooves that are slightly larger than the longitudinal cross-sectional shape of the joining projection edges 5 a and 5 b, and the recessed portion 8 reaches the outer surface of the side bar 3. It has a truncated cone shape with a wide opening. As the base material of the side bar 3, a ready-made flat bar (see FIG. 13B) formed in a rectangular shape in cross section is used as in the first embodiment.

  As shown in FIGS. 14A and 14B, the recess 8 has a truncated pyramid shape in which the opening widens toward the outer surface of the side bar 3, or FIGS. 14C and 14D. As shown in (), it is also possible to form a recess that is recessed perpendicularly to the outer surface of the side bar 3.

  In such a configuration, in order to join the side bar 3 to the side end portion of each main bar 2, as shown in FIG. 16 (A), the joining protrusion formed on the side end portion of the main bar 2. The edges 5a and 5b and the bonding ports 6a and 6b formed on the side bar 3 are opposed to each other, and as shown in FIG. 16 (B), the fitting ports 7a and 6b have fitting openings 7 and 7 respectively. In addition, as shown in FIG. 16 (C), molds 12a and 12b for fitting the protrusions 5a and 5b for joining the main bar 2 to prevent the upper and lower surfaces of the side end of the main bar 2 from being deformed in the vertical direction. In the state where the two are in contact with each other, the end portions of the joining projection edges 5 a and 5 b are pressurized by the pressure members 9 and 9. Here, the pressurizing member 9 is a punch-shaped member having a conical sharp end 10 at the tip, and the projecting edges 5a, 5b for joining the conical sharp end 10 in the thickness direction. Then, the end portions of the joining projection edges 5a and 5b are expanded and deformed in the recessed portions 8 and 8 to be larger than the lateral width of the fitting entrance 7 by being fitted into the overlapping portions. As a result, as shown in FIGS. 17A and 17B, the ends of the joining projection edges 5a and 5b are expanded and deformed in the recesses 8 and 8 so as to be larger than the lateral width of the fitting inlets 7 and 7. The main bar 2 and the side bar 3 can be joined by the deforming portions 11a and 11b.

  As described above, even in the configuration of the second embodiment, a strip plate material having a rectangular cross section that is commercially available as a ready-made product can be used as the base material of the side bar 3, and thus is not in the conventional ready-made product. Compared to the case of using a plate material having a special shape, the cost of the side bar 3 is reduced, and the production cost of the grating 1 can be reduced. Further, particularly in the second embodiment, since the main bar 2 and the side bar 3 are joined by the two expanding deformation portions 11a and 11b, as compared with the first embodiment. Further, the bonding strength can be further increased.

DESCRIPTION OF SYMBOLS 1 Grating 2 Main bar 3 Side bar 5, 5a, 5b Joining protrusion 6, 6a, 6b Joining port 7 Insertion opening 8 Recessed part 9 Pressurizing member 11, 11a, 11b Expanding deformation part

Claims (3)

In the grating comprising a plurality of metal main bars arranged in parallel at a predetermined interval, and metal side bars passed along the side end of each main bar,
On the side end of the main bar, a joining protrusion having a length that fits within the thickness of the side bar after the expansion deformation process is formed, while the band-shaped side bar having a rectangular cross section is formed on the side bar of the main bar. A joining port having a fitting opening into which the joining protrusion is inserted and a recess that is formed on the opening edge of the side bar and is open to the outer surface of the side bar is predetermined along the longitudinal direction of the side bar. It is formed at intervals, and a joining projection edge is fitted into each fitting entrance, and the end of the joining projection edge is pressurized with a pressurizing member so as to expand beyond the width of the fitting entrance in the recess of the joining opening. The grating characterized in that the main bar and the side bar are joined by the expanded deformed portion that has been deformed open.   The grating according to claim 1, wherein the hollow portion has a conical shape in which the opening becomes wider toward the outer surface of the side bar.   The grating according to claim 1 or 2, wherein the main bar is formed by roll forming so that two joining protrusions are stacked in the thickness direction.

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