JPS59118937A - Grating and production thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a grating that is fitted into an opening of a drainage bit, etc., and a method for manufacturing the same.

Conventionally, when manufacturing this type of grating, multiple metal vertical members and multiple metal horizontal members are arranged vertically and horizontally so that they intersect with each other, and each intersection of the art materials is connected by welding. There are many parts (man-hours and manufacturing costs are increased), and since welding distortion occurs in the manufactured grating, it takes a lot of effort and time to correct it.

The present invention has been proposed in view of the above, and an object of the present invention is to eliminate the above-mentioned conventional problems by connecting each intersection of a vertical member and a horizontal member by plastically deforming the horizontal member.

Hereinafter, embodiments of the present invention will be explained with reference to the drawings.
In Figs. 1 to 3, reference numeral 1 indicates a grating, which consists of a vertical member 2 made of a plurality of square metal pipes arranged vertically and horizontally so as to intersect with each other, and a horizontal member 3 made of a plurality of metal I-shaped members. It consists of

Each vertical member 2 has a rectangular positioning hole 4 formed at the intersection with each horizontal member 3, and each horizontal member 3 penetrates each vertical member 2 and connects each inner peripheral surface to the outer peripheral surface of each vertical member 2. A plurality of square-shaped through holes 5 are crimped to each other, and a plurality of positioning claws 6 are formed that protrude inward from the inner peripheral surface of each through hole 5 and fit into the positioning holes 4 of each vertical member 2. . In this way, each positioning hole 4
By fitting the positioning claws 6 with the vertical members 2, the intersecting positions of the vertical members 2 and the horizontal members 3 can be determined accurately, the dimensional accuracy of the grating 1 can be improved, and the appearance can be improved. Further, by crimping the inner circumferential surface of each through-hole 5 to the outer circumferential surface of the vertical member 2, it is possible to prevent the strength of the cross-member 3 from decreasing due to the provision of the through-hole 5 in the cross-member 3.

The grating 1 having the above structure is used by being fitted into the stepped part 9 of the bit frame 8 fixed to the opening of the drainage bit 7, as shown in FIG. 3 are located inside the step 9, water on the floor surface 10 (or road surface) can be efficiently drained through the drain bit 7 through the drain port 11 between the ends of the vertical members 2 and the horizontal members 3. The water can flow down into the bit frame 8 and the grating.
There is no accumulation in between.

Next, a method for manufacturing the grating will be explained.

[First step] As shown in FIG. 4, a plurality of positioning holes 4, that is, the same number as the number of horizontal members 3 to be used, are formed in one side wall 2α of the plurality of vertical members 2 at a predetermined interval in the longitudinal direction thereof. Formed by punching using a press.

[Second Step] A plurality of through holes 5 for vertical members, that is, the same number as the number of vertical members 2 used, are formed in the rising portions 3α of the plurality of horizontal members 3 at predetermined intervals in the longitudinal direction of the horizontal members 3, Positioning pawls 6 that project perpendicularly to the arrangement direction of the through holes 5 are formed on the inner circumferential surface of each through hole 5 by punching using a press. In this case, the inner dimension 7111 of the through hole 5 in the longitudinal direction of the cross member 3 is the outer dimension yL of the longitudinal member 2 parallel to it! The distance d between the tip of the positioning claw 6 and the side facing it is set to be substantially equal to the outer dimension m of the vertical member 2 parallel to the tip of the positioning claw 6.

[Third step] After passing the vertical member 2 through the through hole 5 of the horizontal member 3 and aligning the positioning claw 6 with the positioning hole 4, the positioning claw 6 of the cross member 3 is inserted.
The horizontal portion 3h located on the base side is pressed in the direction of arrow A with a press to recess the base side of the positioning claw 6 of the horizontal portion 3h and the rising portion 3α, and the positioning claw 6 is inserted into the positioning hole 4.
At the same time, the inner circumferential surface of the through hole 5 is pressed onto the outer circumferential surface of the vertical member 2.

This crimping work is efficient if it is performed in one step after a plurality of vertical members 2 and cross members 3 are assembled in a vertical and horizontal manner as shown in FIG.

The grating 1 obtained through the above steps is fitted into the opening of the drainage pit 7, with the recess 12 side facing downward, as shown in FIG. 3.

FIGS. 5(α) and (h) show another embodiment. In this embodiment, a pair of notches 13 opening in the through hole 5' of the cross member 3' are arranged opposite to the positioning pawl 6'. Horizontal portions 3 are formed at both ends of each side and adjacent to the notches 13.
b' is pressed in the direction of arrow B with a press, and is pressed over the outer length of the vertical member 2', crushing both notches 13 and making the recess 12.
', the positioning pawl 6' is fitted into the positioning hole 4', and at the same time the inner circumferential surface of the through hole 5' is pressed against the outer circumferential surface of the vertical member 2'.

Providing the pair of notches 13 in the cross member 3' in this way has the advantage that the pressing force against the horizontal part 3h/ can be reduced and the horizontal part 3h/ can be recessed 12'.

As described above, in the grating 1 according to the present invention, each vertical member 2
．． The art materials 2, 2' and 3.3 cooperate with the positioning holes 4, 4' of 2' and the positioning claws 6, 6' of each cross member 3, 3'.
' is positioned correctly, the method has good precision and an excellent appearance, and the inner circumferential surface of the through hole 5.5' of each horizontal member 3, 3' is aligned with the outer circumferential surface of each vertical member 2, 2'. Since it is crimped, there is no problem of a decrease in strength due to the formation of the through holes 5, 5', and the grating is comparable in strength to gratings manufactured by welding.

Further, according to the grating manufacturing method according to the present invention, since the horizontal members 3, 3' are connected to each vertical member 2, 2' by plastic deformation, the manufacturing man-hours and manufacturing costs associated with welding work are increased. Further, it is possible to improve grating manufacturing efficiency and reduce manufacturing costs without causing problems such as welding distortion.

[Brief explanation of the drawing]

Figures 1 to 4 show the first embodiment of the present invention. Figure 1 is a perspective view of the grating, Figure 2 is a sectional view taken along the line ■-■ in Figure 1, and Figure 3 is the state in which the grating is used. FIG. 4 is a perspective view showing part of the grating manufacturing process, and FIGS. 5(a) and 5(A) are front views showing part of the manufacturing process of the second embodiment. 1...Grating, 2,2/...Vertical member, 3,3'
...Horizontal material, 4,4'...Positioning hole, 5,5'...
・Through hole, 6°61...Positioning claw 9 - Figure 3 Figure 2 Figure 2 Procedural amendment (Revised &) July 1, 1981 Patent Application No. 231566 2, Name of Invention Grating and manufacturing method 3, relation to the person making the amendment Patent applicant name Nippon Bit 4 Agent 〒105 5 “Claims” and “Detailed description of the invention” of the specification subject to amendment Column 6, Contents of the Amendment As shown in the separate sheet, Contents of the Amendment (1) The scope of claims in the specification is corrected as follows. ■ A small number of metal vertical members (2, 2') and multiple metal cross members (3, 2') arranged vertically and horizontally so as to cross each other.
3'), and in the grating that connects each intersection of the painting materials (2, 2'; 3° 3'), Sato! Vertical members (2,2
') is located at the intersection of each cross member (3, 3') with the positioning hole (4,
4'), and each cross member (3° through hole (5, 5'),
Projecting inward from the inner peripheral surface of the second through hole (5, 5')
The positioning holes (4, 4') of the S He longitudinal members (2, 2')
) A grating characterized by having a positioning claw (6°6') that fits into the grating. ■ Small (with one metal vertical member (2,2'), 1
- forming a plurality of positioning holes (4, 4') at predetermined intervals in the longitudinal direction; a plurality of metal cross members (
3, 3') have through holes for vertical members (5, 5'), and the through holes (
Positioning claws (6, 5') that protrude inward from the inner peripheral surface of the
, 6'); passing the vertical members (2, 2') through the through holes (5, 5') of the horizontal members (3, 3') to form the positioning claws (6, 6');') through the positioning hole (4).
, 4'), the horizontal members (3, 3') are plastically deformed to fit the positioning claws (6, 6') into the positioning holes (4, 4') and to Hole (5,5'
) Pressing the inner peripheral surface onto the outer peripheral surface of the vertical member (2, 2') and connecting the vertical member (2°2') and the horizontal member (3, 3') at their intersection; A manufacturing method for grating. 2- (2) Page 3, line 5 of the specification is corrected as follows. "At least one metal vertical member and a plurality of metal cross members are connected to each other" (3) The second line of page 4 of the specification is corrected as follows. (4) Specification Letter 4, No. 7. Line 9: Delete each word that says ``Multiple''... (5) Page 4, line 14 of the specification: ``Each through hole''... Corrected to ``through hole''... (6) Specification page 5, No. 12. The last line, ..."several"......"each"
・・・・・・ Correct each. (7) Lines 13-14 of page 5 of the specification, line 13 of page 6, ``Plurality, encircled''...Delete each. (8) Statement box 8 Sada No. 4. 8th. Line 14: ``Each vertical''...... ``Vertical''...
Correct each. (9) On page 8, line 6 of the specification, the statement ``Method accuracy'' has been corrected to ``1 dimensional accuracy.'' (10) Page 8, line 15 of the specification, ...1 size 5"......"accompanied"
I am corrected. Above 4-

Claims (2)

[Claims] (1) Consists of a plurality of metal vertical members (2, 2') and a plurality of metal horizontal members (3, 3') arranged vertically and horizontally so as to intersect with each other; , 3'), each vertical member (2, 2') has a positioning hole (4, 4') at the intersection with each horizontal member (3, 3').
and each horizontal member (3, 3') has a corresponding length of each longitudinal member (2, 2').
A plurality of through-holes (s, s') that penetrate through the holes and have their inner peripheral surfaces crimped to the outer peripheral surfaces of each vertical member (2, 2'), and the inner peripheral surface of each through-hole (5, 5'). A grating characterized in that it has a plurality of positioning claws (6, 6') that protrude further inward and fit into the positioning holes (4, 4') of each vertical member (2, 2'). (2) A plurality of positioning holes (4, 4') at a predetermined interval in the longitudinal direction of the plurality of metal vertical members (2, 2')
a step of forming; a plurality of metal cross members (3, 3');
A plurality of vertical member through holes (s, s') are formed at predetermined intervals in their longitudinal direction, and each through hole (s
, s'), forming positioning claws (6, 6) protruding in a relationship perpendicular to the arrangement direction of the through holes (5, 5'); ) to the cross member (
3, after passing through the three through holes (5, 5') and aligning the positioning claws (6, 6') with the positioning holes (4, 4'), the horizontal member (3, 3') ) by plastically deforming the positioning claws (6, 6') into the positioning holes (4, 4).
') and press the inner peripheral surfaces of the through holes (s, s') to the outer peripheral surfaces of the vertical members (2, 2'), so that the vertical members (2, 2') and the horizontal members ( 3. A method for producing a grating, which comprises: connecting three pieces at their intersection points;