JP3889517B2 - Grating - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a grating used by being attached to a side groove or the like.
[0002]
[Prior art]
As shown in FIG. 16, the 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 a predetermined interval. There is known one in which side bars e are disposed on both side edges along the longitudinal direction of the frame d.
[0003]
Such a conventional grating a is manufactured by the method shown in FIG. First, as shown in FIG. 17A, a plurality of connection holes x are formed in each main bar b in correspondence with the number of cross bars c. Here, the connecting hole x has a horizontal width equal to or greater than the vertical width of the crossbar c, and a vertical width equal to or smaller than that, and inclined edges g and g that are inclined from the side toward the center at the vertical position of the hole edge. Further, the upper and lower stopper edges f and f are alternately provided at the end portions h and h of the inclined edges g and g, respectively.
[0004]
Further, as shown in FIG. 17 (b), a plurality of insertion grooves y are formed at predetermined intervals corresponding to the number of main bars b in the upper edge of the cross bar c. Here, the distance between the groove bottom surface i of the fitting groove y and the lower edge j of the cross bar c is set to be slightly larger than the vertical distance between the end portions h and h of the inclined edges g and g.
[0005]
Next, the main bars b are aligned at a predetermined interval with an appropriate jig, and as shown in FIG. 17 (c), the cross bars c are inserted in the connecting holes x in a skewed manner in the horizontal direction. The cross bar c is rotated upward through the guiding action of the inclined edges g and g in a state where the insertion groove y of c and the connecting hole x of the main bar b are aligned, and the upper and lower side edges thereof are the stoppers. The upper edge of each connecting hole x is inserted into each insertion groove y as an upright state in contact with the edges f.
[0006]
As a result, as shown in FIG. 18, the groove bottom surface i and the lower edge j of the cross bar c are fitted in a pinched state between the end portions h and h of the inclined edges g and g of the connection hole x. Thus, a plurality of main bars b and an appropriate number of cross bars c are joined orthogonally to form a lattice frame d. Further, if necessary, welding is performed at the intersection of the cross bar c and the main bar b at the position of the connecting hole x.
[0007]
Next, as shown in FIG. 16, the grating a is manufactured by joining the side bars e to both side edges along the longitudinal direction of the lattice frame d.
[0008]
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 welding the end portions of the main bars b to the side edges of the side bar e by welding. 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 aesthetic appearance is deteriorated. Therefore, as an alternative joining means, as shown in FIG. 19 (a), a projection k is formed at the end of each main bar b, while an insertion hole m into which the projection k can be fitted into the side bar e. As shown in FIGS. 19 (B) and 19 (C), the projections k are formed at predetermined intervals along the longitudinal direction, the projections k are inserted into the respective insertion holes m, and the protruding ends thereof are crimped from the outer surface side. A joining means for joining each main bar b and the side bar e has been devised.
[0009]
[Problems to be solved by the invention]
In the joining means by caulking as described above, since distortion due to heat does not occur, a product with high dimensional accuracy and good aesthetics can be obtained, but it is formed at the end of each main bar b. Since the process of cutting the protrusion k takes time, and it takes time to prepare the material before joining, there is a problem that the production cost increases.
[0010]
On the other hand, in the joining means of the main bar b and the cross bar c shown in FIG. 17, it is necessary to drill a connecting hole x having a complicated shape in each main bar b. Since a high dimensional accuracy is required for the insertion groove y to be formed, it takes time to form the plate, and further, a flat cross bar c is inserted into the connecting hole x of each main bar b and is approximately 90 ° upward. By rotating, the upper end edges of the connection holes x of the main bars b must be simultaneously inserted into the insertion grooves y of the cross bar c, so that the assembly is troublesome.
[0011]
One object of the present invention is that in the joining means for joining each main bar b and the side bar e by caulking, it is not necessary to cut the projection k formed at the end of each main bar b, thereby reducing the production cost. There is to make it.
[0012]
Another object of the present invention is to simplify the shape of the connecting hole x formed in the main bar b and simplify the groove processing of the cross bar c in the joining means of each main bar b and the cross bar c. It is to facilitate the forming process and improve the workability of assembly.
[0013]
[Means for Solving the Problems]
The present invention is a grating comprising a plurality of main bars arranged in parallel at a predetermined interval and a side bar extended along the side end portion of each main bar. A plurality of vertical cut grooves in the longitudinal direction in which the main bar is fitted perpendicularly to the protruding side edge of the side bar formed by bending the protruding side edge protruding to the main bar side between the support edges in the longitudinal direction The side ends of the main bar are respectively fitted into the respective cut grooves, and the upper and lower end surfaces of the side ends are in contact with the support edges, and the outer sides of the cut grooves are formed on the outer surface side. The grating is characterized in that the main bar and the side bar are joined by crimping the protruding end of the main bar protruding in the direction.
[0014]
In such a configuration, when the main bar is cut into a predetermined length from the long main bar base material, it is only necessary to cut the side ends in a straight line. It takes no time to prepare the materials.
[0015]
Further, the present invention provides a grating including a plurality of main bars arranged in parallel at a predetermined interval and a cross bar that is orthogonally passed to each main bar, while forming a square connection hole in each main bar. A plurality of cut grooves having a groove bottom surface forming a circumferential surface of an imaginary circle having a diameter larger than the imaginary inscribed circle of the linking hole in the cross bar formed in substantially the same cross-sectional shape as the linking hole along the longitudinal direction. In the state where the cross bar is inserted into the connecting hole of each main bar and each notch groove of the cross bar is aligned with the connecting hole, the cross bar is rotated to form each notch groove. The grating is characterized in that each main bar and the cross bar are joined by forcibly fitting each connecting hole.
[0016]
In such a configuration, since the connecting holes formed in each main bar are simple squares, the forming process is easy, and a plurality of cross bars formed in a crossbar having substantially the same cross-sectional shape as the connecting holes. The cutting grooves can be formed and processed simultaneously by pressing a plurality of rotating blades arranged at predetermined intervals from the side while cutting the crossbar around the shaft center. And can be easily formed. Furthermore, when assembling each main bar and cross bar, the distance between the groove bottoms facing each other in the diameter direction of the cut groove of the cross bar is larger than the hole edge distance of the connecting hole, so By pivoting the groove bottom, the bottom surface of the groove can be pressed against the hole edge of the connecting hole and kept immovable. Here, it is sufficient that the cross bar is rotated by approximately 45 °, and since the cross bar is square, it is easy to grip and the rotation operation can be easily performed.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
One embodiment of the present invention will be described with reference to FIGS.
FIG. 1 shows a grating 1 according to the present invention. The grating 1 includes a plurality of main bars 2 arranged in parallel at predetermined intervals, two side bars 3 passed along the side end portions of the main bars 2, and orthogonal to the center of the main bars 2. And the crossbar 4 passed to
[0018]
As shown in FIGS. 2 and 3, the main bar 2 is a long main bar made of a mold material, a press-molded material, or the like formed in a substantially I-shaped cross section having a thin wall portion 10b between upper and lower edges 10a, 10a. It is obtained by cutting the substrate into a short predetermined length, and its side edges 5 are cut in a straight line. Here, since this cutting process can be performed by a cutting machine equipped with a normal rotary blade, it does not take time and does not require time for material preparation before joining.
[0019]
Each main bar 2 is formed with a square connecting hole 6 at the same central position. The connecting hole 6 has a simple regular square shape and is formed by stamping with a press. Thereby, the dimensional accuracy is high, and the forming process can be easily performed.
[0020]
On the other hand, as shown in FIGS. 4 to 6, the side bar 3 includes support edges 7 and 7 on the upper and lower sides, and a protruding side edge 8 that protrudes laterally between the support edges 7 and 7 is bent. It is made of a molded material or a press-molded material that has been cut into a predetermined length. On the protruding side edge 8 of the side bar 3, as shown in FIG. 5, a plurality of vertical cut grooves 9 into which the main bar 2 is fitted orthogonally are formed at predetermined intervals along the longitudinal direction. ing. The width of each cut groove 9 is substantially the same as the thickness of the thin portion 10 b of the main bar 2, and is formed across the entire vertical width of the protruding side edge 8. The forming process of the plurality of cut grooves 9 on the protruding side edge 8 is performed by a grooving machine in which a plurality of rotary blades are fixed to the rotating shaft at a predetermined interval, and the thickness approximately matches the thin portion 10 of the main bar 2. A plurality of slits 9 are simultaneously formed at a predetermined interval by cutting with a rotating blade.
[0021]
As shown in FIGS. 7 and 8, the cross bar 4 is made of a mold material formed into a square shape having substantially the same cross-sectional shape as the connection hole 6 of the main bar 2, and is formed into a long predetermined length. A cut one is used. A plurality of cut grooves 11 are formed in the cross bar 4 at predetermined intervals along the longitudinal direction. The forming process of the cut groove 11 is performed by a grooving machine used for forming the cut groove 9 of the side bar 3. That is, in a state where the cross bar 4 is rotated around the axis, the plurality of cutting grooves 11 are formed at predetermined intervals by pressing the plurality of rotary blades of the grooving machine from the side and cutting. At the same time, it is formed and processed. Thereby, the interval of the cut groove 11 and the interval of the cut groove 9 of the side bar 3 coincide with each other. Each cut groove 11 is cut so that the groove bottom surface 12 forms a peripheral surface of a virtual circle r _{2 having} a diameter slightly larger than the virtual inscribed circle r ₁ of the connecting hole 6 as shown in FIG. The interval w ₂ between the groove bottom surfaces 12 and 12 facing each other in the diameter direction of the cut groove 11 is set to be larger than the hole edge interval w ₁ of the connecting hole 6. In this way, the cross bar 4 is rotated around the axis, and a plurality of cutting grooves 11 are simultaneously formed by pressing a plurality of rotating blades arranged at predetermined intervals and cutting from the side. Since it can be processed, the dimensional accuracy can be easily obtained, and the forming process can be easily performed.
[0022]
Next, the procedure for assembling the main bar 2, the side bar 3, and the cross bar 4 will be described. First, the plurality of main bars 2 are held in parallel so as to match the intervals between the cut grooves 11 of the cross bar 4. This parallel operation can be performed by a jig having a known configuration that is used when assembling a general grating.
[0023]
In this way, by connecting the plurality of main bars 2 in parallel, the connection holes 6 formed in each main bar 2 are arranged in a straight line. Then, as shown in FIG. 10 (a), the crossbar 4 is inserted into each connecting hole 6, and the crossbar 4 is appropriately fitted with each notch groove 11 being aligned with each connecting hole 6. Rotate approximately 45 ° using a jig. Here, this rotation operation may be performed in either the left or right direction, and since the cross bar is square, it is easy to grasp and the rotation operation can be easily performed. When the cross bar 4 is thus rotated, the edge of the connection hole 6 is inserted into the cut groove 11 and opposed in the diameter direction of the cut groove 11 as shown in FIG. Since the interval w ₂ (see FIG. 9) between the groove bottom surfaces 12 and 12 is larger than the hole edge interval w ₁ of the connection hole 6, each groove bottom surface 12 is pressed against the hole edge of the connection hole 6. At this time, since each groove bottom surface 12 has a curved surface shape that forms a circumference, it can be smoothly pressed against the hole edge of the connecting hole 6. Thereby, each notch groove 11 is forcibly fitted in each connecting hole 6, and as shown in FIG. 11, each main bar 2 and crossbar 4 can be joined.
[0024]
In this joined state, each main bar 2 and cross bar 4 has a retaining action due to the insertion of the edge of the connection hole 6 in the cut groove 11, and each groove bottom 12 is a hole of the connection hole 6. It is in a robust assembled state due to the clamping action by being pressed against the edge, and the assembled state is maintained even if the jig holding each main bar 2 is removed.
[0025]
And after removing the said jig | tool, the side bar 3 is each assembled | attached to the both ends 5 and 5 of each main bar 2 assembled | attached with the cross bar 4 as mentioned above. This assembly is performed as follows. That is, as shown in FIG. 12 (a), the side bars 3 are arranged so that the protruding side edges 8 protrude toward the main bar 2 side, and as shown in FIG. The support edges 7 and 7 of the side bar 3 are brought into contact with the upper and lower end surfaces of the side end 5, and the side ends 5 of the main bars 2 are respectively inserted into the cut grooves 9 of the protruding side edges 8. Here, when the intervals between the cut grooves 9 coincide with the intervals between the main bars 2, the insertion can be easily performed. Then, when the side ends 5 of the main bars 2 are respectively inserted into the cut grooves 9 of the projecting side edges 8 in this way, the thin walls of the side ends 5 of the main bars 2 are formed from the cut grooves 9 to the outer surface side of the side bar 3. The portion 10b protrudes, and as shown in FIG. 12 (c), several portions of the protruding end are recessed in a semicircular shape and caulked, thereby increasing the thickness of the protruding end and The side bar 3 can be joined. Thereby, the assembly | attachment state shown in FIG. 13 is obtained. The operation of inserting the side edge 5 into the cut groove 9 and the subsequent caulking operation can be performed simultaneously on both sides of each main bar 2, thereby improving the work efficiency.
[0026]
Thereby, the grating 1 shown in FIG. 1 is completed. In addition, as shown in FIG. 14, the end of the cross bar 4 protruding from the main bar 2 located at both ends in the longitudinal direction of each main bar 2 is recessed into a cross shape or the like as necessary. The retaining process 13 may be performed by caulking.
[0027]
In the above embodiment, the number of the crossbars 4 is one, but a plurality of crossbars 4 can be arranged according to the width of the grating 1. In the embodiment, the connecting hole 6 of the main bar 2 and the cross-sectional shape of the crossbar 4 are regular squares, but the present invention is not limited to this, and other squares such as regular triangles and polygons may be used. Good.
[0028]
FIG. 15 shows the main bar 2 having a slightly changed cross-sectional shape, and is formed with locking step portions 10c and 10c protruding laterally at the upper and lower positions of the thin portion 10b. The vertical distance between the locking step portions 10c and 10c is substantially the same as the vertical distance between the step portions 8 'and 8' (see FIG. 4) formed at the vertical position of the protruding side edge 8 of the side bar 3. It has become. Thereby, when the main bar 2 and the side bar 3 are joined, as shown in FIG. 12B, when the side end 5 of the main bar 2 is inserted into the cut groove 9 of the protruding side edge 8 of the side bar 3, The step portions 8 'and 8' of the side bar 3 are engaged and positioned with the locking step portions 10c and 10c of the main bar 2, respectively, and the vertical displacement of the side bar 3 is prevented and the dimensions are increased. It can be a product with high accuracy.
[0029]
【The invention's effect】
In the present invention, as described above, the main bar 2 is formed on the protruding side edge 8 of the side bar 3 formed by bending the protruding side edge 8 protruding toward the main bar 2 between the upper and lower support edges 7 and 7. A plurality of upper and lower cut grooves 9 that are fitted orthogonally are formed at predetermined intervals along the longitudinal direction, and the side ends 5 of the main bar 2 are fitted into the respective cut grooves 9, and the respective cut grooves 9 are inserted. Since the main bar 2 and the side bar 3 are joined by caulking the protruding end of the main bar 2 protruding from the outer surface to the side surface 5 of the main bar 2 as in the prior art. It is not necessary to cut and form the projections for joining, and each main bar 2 only needs to cut the side end 5 linearly when cutting the long main bar base material to a predetermined length. Therefore, it takes less time and material preparation time before joining is shortened. It is possible to Gensa.
[0030]
Further, according to the present invention, each main bar 2 is formed with a square connecting hole 6, while the cross bar 4 formed in substantially the same cross-sectional shape as the connecting hole 6 has a virtual inscribed circle r ₁ of the connecting hole 6. A plurality of cut grooves 11 having a groove bottom surface 12 constituting the peripheral surface of a virtual circle r _{2 having} a large diameter are formed at predetermined intervals along the longitudinal direction, and the crossbar 4 is formed in the connecting hole 6 of each main bar 2. The cross bar 4 is rotated in a state in which the cut grooves 11 of the cross bar 4 are aligned with the connection holes 6, and the cut grooves 11 are forcibly fitted to the connection holes 6. Since the main bar 2 and the cross bar 4 are joined, the connecting hole 6 formed in each main bar 2 has a simple square shape, so that the forming process is easy. A plurality of cuts formed in the crossbar 4 having substantially the same cross-sectional shape 11 can be formed and processed simultaneously by pressing and cutting a plurality of rotary blades arranged at predetermined intervals from the side with the crossbar 4 being rotated around the axis. It is easy to take out and can be easily formed. Furthermore, when assembling each main bar 2 and the cross bar 4, the gap between the groove bottom faces 12, 12 opposed in the diameter direction of the cut groove 11 of the cross bar 4 is larger than the hole edge gap of the connecting hole 6. By rotating the cross bar 4 in either the left or right direction, the bottom surface 12 of the groove can be pressed against the hole edge of the connecting hole 6, and since the cross bar 4 is square, it can be easily gripped. There are excellent effects such as easy operation.
[Brief description of the drawings]
FIG. 1 is a plan view of a grating according to the present invention.
FIG. 2 is a front view of a main bar constituting the grating described above.
FIG. 3 is an enlarged side view of the main bar of the above.
FIG. 4 is a partial perspective view of a side bar constituting the grating according to the present invention.
FIG. 5 is a partial front view of the above sidebar.
FIG. 6 is an enlarged side sectional view of the same side bar.
FIG. 7 is a partial perspective view of a cross bar constituting the grating according to the present invention.
FIG. 8 is a partial front view of the above crossbar.
FIG. 9 is an explanatory view of a cut groove formed in the crossbar of the above.
FIG. 10 is an enlarged front view of the main part showing the assembly process of the main bar and the cross bar.
FIG. 11 is a partial perspective view of the assembled state of the main bar and the cross bar.
FIG. 12 is a side sectional view showing an assembling process of the main bar and the side bar.
FIG. 13 is a perspective view of the assembled state of the main bar and the side bar.
FIG. 14 is a side view of the grating in which the end portion of the side bar is subjected to the retaining process.
FIG. 15 is an enlarged side view of a main bar having another configuration.
FIG. 16 is a plan view of conventional grating.
FIG. 17 is an explanatory diagram showing a main part configuration and an assembling method of a conventional main bar and cross bar.
FIG. 18 is a cross-sectional view showing an assembled state of a conventional main bar and cross bar.
FIG. 19 is an explanatory view of a conventional joining means by caulking of a main bar and a side bar.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Grating 2 Main bar 3 Side bar 4 Cross bar 5 Side end 6 Connection hole 7 Support edge 8 Protruding side edge 9 Cut groove 11 Cut groove 12 Groove bottom surface ₁ Virtual inscribed circle r ₂ Virtual circle

Claims (2)

In the grating comprising a plurality of main bars arranged in parallel at a predetermined interval, and a side bar passed along the side end of each main bar,
The main bar is fitted perpendicularly to the projecting side edges of the side bar which is provided with supporting edges on the upper and lower sides, and the projecting side edges projecting to the main bar side between the supporting edges are bent. A plurality of cut grooves in the vertical direction are formed at predetermined intervals along the longitudinal direction, and the side ends of the main bar are respectively fitted into the cut grooves, and the upper and lower end surfaces of the side edges are brought into contact with the support edge. In this state, the main bar and the side bar are joined by caulking the protruding end of the main bar that protrudes outward from the respective cut grooves. In the grating comprising a plurality of main bars arranged in parallel at a predetermined interval, and cross bars passed orthogonally to each main bar,
While forming a square connecting hole in each main bar, a cross-section formed in a substantially same cross-sectional shape as the connecting hole, a bottom surface of a groove constituting a peripheral surface of a virtual circle having a diameter larger than a virtual inscribed circle of the connecting hole Are formed at predetermined intervals along the longitudinal direction, the crossbar is inserted through the connection hole of each main bar, and the respective cut grooves of the crossbar are aligned with the connection hole, A grating characterized in that each main bar and the cross bar are joined by rotating the cross bar and forcibly fitting each cut groove into each connecting hole.

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