JP2017155530A - Grating - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grating capable of improving walking performance on the grating by preventing looseness of a main bar to a cross bar and opening of an interval between the main bars thereby.SOLUTION: In a grating 10 having a plurality of main bars 20 arranged in parallel and a cross bar 40 inserted into an insertion hole 23 provided in the plurality of respective main bars 20, the cross bar 40 comprises a slit 41 fittable to an inner peripheral wall 24 of the insertion hole 23 and molded so that its opening edge part 42 becomes parallel to the insertion hole 23 of the main bars 20, and is fixed to the main bar 20 by being plastically deformed in a state of fitting the slit 41 to the inner peripheral wall 24 of the insertion hole 23.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a grating used as a groove lid or the like.

  Conventionally, a grating used as a groove cover or the like is in a state in which, as shown in Patent Document 1, a plurality of main bars arranged in parallel at equal intervals and orthogonal to each of the plurality of main bars via connecting holes And a cross bar that is fixed to each main bar by being deformed into a cross-sectionally vertically long oval shape with a diameter larger than the inner diameter of the connecting hole by a clamping press. And a side bar that supports both ends, and is assembled in a lattice shape.

Japanese Patent No. 3410819

  However, in the conventional grating as shown in Patent Document 1, a vehicle or a person or the like applies an excessive force to the upper part of the upper part, and the main bar bends due to repeated loads, and the fitting with the cross bar is loosened. As a result, rattling occurs, and the interval between the main bars opens more than a predetermined interval. As a result, female high-heeled heels, elderly wands, and the like are sandwiched between spaced apart main bars, which deteriorates the walking performance on the grating and causes damage.

  In view of the above, an object of the present invention is to provide a grating that can improve the walking performance on the grating by preventing the main bar from rattling and the gap between the main bars.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, the grating according to the present invention is a grating including a plurality of main bars arranged in parallel and a cross bar inserted into an insertion hole provided in each of the plurality of main bars. Includes a slit that can be fitted to the inner peripheral wall of the insertion hole and whose opening edge portion is parallel to the insertion hole of the main bar, and the slit is fitted to the inner peripheral wall of the insertion hole. It is fixed to the main bar by being plastically deformed in the combined state.

  In the above grating, the present invention uses the cylindrical member formed with the slit as the cross bar.

  According to the present invention, the cross bar is provided with a slit having an opening edge portion formed so as to be parallel to the insertion hole of the main bar, and is plastically deformed in a state where the slit is fitted to the inner peripheral wall of the insertion hole. Thus, the cross bar can be securely fixed to the main bar. For this reason, it is possible to prevent the main bar from rattling with respect to the cross bar and the resulting gap between the main bars, thereby improving the walking performance on the grating.

It is a perspective view of grating concerning the present invention. It is the front view and top view which show the manufacturing method of the grating which concerns on this invention. It is a perspective view of the cross bar of the grating concerning the present invention.

  First, the grating 10 according to the present invention will be described. As shown in FIG. 1, the grating 10 is arranged orthogonally to a plurality of main bars 20 arranged in parallel, side bars 30 arranged at both ends of the main bar 20, and a central part of the main bar 20. Crossbar 40. The grating 10 is formed in a lattice shape by supporting both ends of a plurality of main bars 20 arranged at equal intervals by side bars 30 and supporting the center of the plurality of main bars 20 by cross bars 40. Yes.

  As shown in FIG. 1 and FIG. 2, the main bar 20 is made of stainless steel having a substantially T-shaped cross section, which is composed of an upper surface portion 21 and a vertical surface portion 22 formed perpendicular to the upper surface portion 21. It is formed by a horizontally long plate. In the grating 10, the longitudinal direction of the main bar 20 is the width direction of the grating 10, and the direction in which the plurality of main bars 20 are arranged at equal intervals is the longitudinal direction of the grating 10.

  As shown in FIG. 2A, an insertion hole 23 for inserting the cross bar 40 is provided in the central portion of the main bar 20. The insertion hole 23 is a hole formed in the vertical surface portion 22 of the main bar 20 and opens so that the cross bar 40 can be inserted. The diameter of the inner peripheral wall 24 (the diameter of the opening portion) of the insertion hole 23 is the left-right direction (longitudinal direction of the vertical surface portion 22 of the main bar 20) and the vertical direction (width direction of the vertical surface portion 22 of the main bar 20). And different. Specifically, the insertion hole 23 is formed so that the diameter in the left-right direction of the inner peripheral wall 24 is longer than the diameter in the vertical direction of the inner peripheral wall 24.

  As shown in FIG. 1, the side bar 30 is a rod-shaped member made of stainless steel whose center portion is refracted so as to be fitted into recesses formed at both ends of the main bar 20. The side bars 30 are disposed at both ends of the main bar 20, and a plurality of main bars 20 are fitted and fixed along the longitudinal direction at equal intervals.

  As shown in FIG. 1, the cross bar 40 is a hollow stainless steel round tube formed in a cylindrical shape. The cross bar 40 is inserted into each insertion hole 23 of the plurality of main bars 20. In other words, the cross bar 40 is arranged in a state orthogonal to the central part of the plurality of main bars 20 arranged in parallel. When the cross bar 40 is inserted through the insertion hole 23 of the main bar 20, the cross bar 40 is fixed to the main bar 20 by pressing and plastically deforming a portion located between the main bars 20.

  As shown in FIGS. 2 and 3, the cross bar 40 is formed with a slit 41 for preventing the main bar 20 from rattling. The slit 41 is a recess formed in a groove shape with respect to the outer peripheral surface of the cross bar 40 as shown in FIG. 3A or a hole shape penetrating the cross bar 40 as shown in FIG. And is a portion that is fitted into the inner peripheral wall 24 of the insertion hole 23 when the cross bar 40 is inserted through the insertion hole 23 of the main bar 20. The slit 41 is formed so that a pair of recesses or holes face each other in the width direction of the cross bar 40 and is formed at substantially the same interval as the interval at which the main bar 20 is disposed in the longitudinal direction of the cross bar 40.

  As shown in FIG. 3, the slit 41 is formed such that an opening edge portion 42 that forms the side surface of the concave portion or the hole portion is perpendicular to the outer peripheral surface of the cross bar 40. Thereby, the opening edge part 42 of the slit 41 becomes parallel to the opening surface (the vertical surface part 22 of the main bar 20) of the insertion hole 23 of the main bar 20 when the cross bar 40 is inserted into the main bar 20. Further, the interval between the opening edge portions 42 facing each other in the slit 41 is formed to be larger than the thickness of the inner peripheral wall 24 of the main bar 20 to be fitted.

  The slit 41 can be fitted to the inner peripheral wall 24 of the insertion hole 23 of the main bar 20, and breathing and machining (cutting) so that the opening edge portion 42 is parallel to the insertion hole 23 of the main bar 20. Etc., it is formed into a groove shape or a hole shape.

  Next, a method for manufacturing the grating 10 will be described. In addition, the following manufacturing methods are examples of the manufacturing method of the grating 10, and the grating 10 of this invention is not limited to what was manufactured with the following manufacturing methods.

  As shown in FIG. 2A, a plurality of main bars 20 are arranged in parallel at predetermined intervals. By arranging a pair of side bars 30 at both ends of a plurality of main bars 20 arranged in parallel, and fitting the convex portions of the side bars 30 into the concave portions at both ends of the main bar 20, the both ends of the main bar 20 are connected to the side bars. 30.

  Next, as shown in FIG. 2B, the cross bars 40 formed with the slits 41 are sequentially inserted into the insertion holes 23 of the plurality of main bars 20. At this time, the slit 41 faces the longitudinal direction of the main bar 20 (the left-right direction of the insertion hole 23) so that the slit 41 of the cross bar 40 does not fit into the inner peripheral wall 24 of the insertion hole 23 of the main bar 20. 23.

  2C, after the cross bar 40 is inserted, the cross bar 40 is rotated so that the slit 41 is in the width direction of the main bar 20 (the vertical direction of the insertion hole 23). Then, the slit 41 located at the lower portion of the insertion hole 23 is fitted to the inner peripheral wall 24 of the insertion hole 23.

  As shown in FIG. 2D, after the cross bar 40 is rotated, both side surfaces of the cross bar 40 (the left and right side surfaces in the width direction of the cross bar 40) and portions located between the main bars 20 (main The cross bar 40 is plastically deformed by pressing a portion of the bar 20 that does not come into contact with the insertion hole 23 from the left and right in the width direction of the cross bar 40. Thereby, the cross bar 40 is deformed in the vertical direction, and the slit 41 is fitted into the inner peripheral wall 24 of the insertion hole 23. Further, the cross bar 40 is brought into close contact with the inner peripheral wall 24 of the insertion hole 23 while maintaining a predetermined strength, and the main bar 20 is stretched. Therefore, in a state where the slit 41 of the cross bar 40 is firmly fitted to the inner peripheral wall 24 of the insertion hole 23 of the main bar 20, the cross bar 40 is fixed to the center portion of the main bar 20. The play of the main bar 20 and the opening of the space between the main bars 20 due to the play can be reliably prevented.

  As described above, in the grating 10, the slit 41 having the opening edge portion 42 formed so as to be parallel to the opening surface of the insertion hole 23 of the main bar 20 is fitted to the inner peripheral wall 24 of the insertion hole 23. In this state, since the cross bar 40 is plastically deformed and fixed to the main bar 20, the cross bar 40 can be reliably fixed to the main bar 20. Therefore, the play of the main bar 20 with respect to the cross bar 40 and the opening of the space between the main bars 20 thereby can be prevented, and the walking performance on the grating 10 can be improved. In particular, in the grating 10, since the opening edge portion 42 of the slit 41 is formed to be parallel to the opening surface of the insertion hole 23 of the main bar 20, the cross bar 40 with respect to the inner peripheral wall 24 of the insertion hole 23. The slit 41 can be securely fitted.

  In the present embodiment, the main bar 20 is formed of a horizontally long plate made of stainless steel having a substantially T-shaped cross section. However, the present invention is not limited to this, and depending on the application, a steel plate, an aluminum plate, etc. You may shape | mold and you may shape | mold in cross sectional view substantially I shape or a substantially reverse L shape.

  Further, in the present embodiment, the insertion hole 23 is provided in the central portion of the main bar 20, but is not limited thereto, and may be provided on the left and right of the main bar 20, for example. You may provide in multiple places (for example, a total of three places, right and left, and a center part). That is, not only the crossbar 40 arranged at the center of the main bar 20 but also a plurality of crossbars 40 arranged on the main bar 20 may be used.

  Furthermore, the insertion hole 23 is formed so that the diameter in the left-right direction of the inner peripheral wall 24 is larger than the diameter in the vertical direction of the inner peripheral wall 24, but is not limited to this, and the left-right direction of the inner peripheral wall 24 The diameter may be smaller than the diameter of the inner peripheral wall 24 in the vertical direction.

  Moreover, in this Embodiment, although the cross bar 40 is comprised with the stainless steel hollow round tube, it is not limited to this, You may shape | mold with a steel plate, an aluminum plate, etc. depending on a use.

  Further, in the present embodiment, the opening edge portion 42 in the slit 41 of the crossbar 40 is formed perpendicular to the outer peripheral surface of the crossbar 40. However, the present invention is not limited to this. If the opening edge portion 42 and the opening surface of the insertion hole 23 of the main bar 20 (the vertical surface portion 22 of the main bar 20) are parallel to each other, the insertion hole 23 of the main bar 20 is inserted. In accordance with the state of the inner peripheral wall 24 and the vertical surface portion 22 of the main bar 20 (the angle of the vertical surface portion 22 with respect to the upper surface portion 21), etc., the outer peripheral surface of the cross bar 40 is molded at a predetermined angle. (It is not necessary to mold vertically).

DESCRIPTION OF SYMBOLS 10 Grating 20 Main bar 23 Insertion hole 24 Inner peripheral wall 40 Cross bar 41 Slit 42 Opening edge part

Claims (2)

A grating comprising a plurality of main bars arranged in parallel, and a cross bar inserted into an insertion hole provided in each of the plurality of main bars,
The crossbar is
While having a slit that can be fitted to the inner peripheral wall of the insertion hole and the opening edge portion thereof is parallel to the insertion hole of the main bar,
The grating characterized by being fixed to the main bar by being plastically deformed in a state where the slit is fitted to the inner peripheral wall of the insertion hole. The grating according to claim 1, wherein the cross bar is a cylindrical member formed with the slit.

Images