COMBINATION STRUCTURE OF STRAIGHT BAR AND CROSS BAR OF GUARDRAIL

Abstract

A combination structure of a straight bar and a cross bar of a guardrail is to comprise an embedding opening configured at a position where the cross bar provided for the straight bar to be inserted. The two corresponding inner walls inside the cross bar extend two the two sides of the embedding opening to form a buckle plate. The tail end of the buckle plate has a buckle part, and a distal end of the buckle part is located within a bore diameter projection range of the embedding opening. The extending direction of the buckle part is away from the embedding opening. Based on the above configuration, when the straight bar and the cross bar of the guardrail are assembled, the clamping force of two corresponding buckle plates enable the two corresponding buckle parts to strongly buckle the corresponding outer walls of two sides of the straight bar. The configuration is easily assembled and has tight stability and no residual gaps are left.

Description

BACKGROUND OF THE INVENTION

The present invention relates to a combination structure of a straight bar and a cross bar of a guardrail, and more particularly to a straight bar and cross bar combination structure of the guardrail easily to be assembled and having a tight and stable combination to avoid the residual gap left.

DESCRIPTION OF THE RELATED ART

Accordingly, a guardrail is primarily fixed on the edge of a balcony to prevent people from falling, and therefore the stability of the guardrail is worthy of attention. The prior combination of the straight bars and the cross bars is that after the straight bar passes through the cross bar, the straight bar and the cross bar are secured via a screw piece transversely passing through the jointing position thereof. The prior art combination method of using screw pieces to secure the cross bar and straight bar is time-consuming for users and further the head of the screw piece is exposed to cause the drawback of overall appearance.

Another assembly method of a guardrail is an assembly method without screw pieces, as disclosed in China Patent Application No. 202021218998.X (hereinafter referred to as “the prior art”, and the reference numbers in the description are used to facilitate understanding). In the prior art, the upper crossbar 2 and the lower crossbar 3 are both provided with the mounting grooves 6 for receiving the ends of the square tubes 5, a limit sliding bar 12 is fixed on the two inner walls of the notch of the mounting groove 6, and the end side wall of each square tube 5 is provided with a limit sliding groove 13 matching with the limit sliding bar 12, thereby enabling each square tube 5 to be embedded along the horizontal direction in a manner of one end of the upper crossbar 2 and the lower crossbar 3 to be aligned with the limit sliding bar 12 via the limit sliding groove 13 so that all the square tubes 5 are evenly distributed between the upper crossbar 2 and the lower crossbar 3, and afterwards, the notch of the mounting grooves 6 are provided with a buckle strip 7 at an equal interval to separate each square tube 5. The above-mentioned prior art has a snap function without requiring screw pieces, but there is a drawback during assembly process, namely, each square tube 5 is pushed to move in horizontal direction from one end of the upper crossbar 2 and the lower crossbar 33 at the time of the limit sliding groove 13) to be embedded and connected with the limit sliding bar 12, and after each square tube 5 is adjusted to be equal distance, a buckle strip 7 is used to separate and fasten the intervals of each square tube 5. Such a structure removes screws to avoid bad appearance, but the assembly takes a lot of time and effort.

In view of the drawback of the above prior art in application, the inventor of the present invention has made further modification and improvement after Taiwan Patent Application No. 112135732, entitled “Combination Structure of Straight Bar and Cross Bar of Guardrail’ has been allowed. (The publication date is expected to be Feb. 1, 2024).

SUMMARY OF THE INVENTION

It is a primary objective of the present invention to provide a combination structure of a straight bar and a cross bar of a guardrail easily to be assembled with tight and stable combination to avoid the residual gap left.

The primary feature of the present invention is to install an embedding opening at the inserting position which a cross bar is defined to allow an end part of a straight bar to be inserted into, the two corresponding inner walls inside the cross bar extends respectively toward the two sides of the embedding openings to form a buckle plate, wherein a tail end of the buckling plates having a buckle part located within a bore diameter projection range of the embedding opening, and the extension direction of the buckle par is away from the embedding opening; and, via the above-mentioned configuration, when the straight bar and the cross bar are assembled, the clamping force of the corresponding buckle plates enable the two corresponding buckle parts to strongly buckle the two outer walls corresponding to the straight bar. The above-mentioned configuration enables the combination of the straight bar and the cross bar of the guardrail to be easily assembled with tight and stable combination to avoid the residual gap left.

Other features and advantages of the present invention will become apparent from the following description of the invention which refers to the accompanying embodiments and drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a combination of an embodiment of the present invention.

FIG. 2 is an exploded view of an embodiment of the present invention.

FIG. 2A is a partial enlarged view of 2A part of FIG. 2.

FIG. 2B is a partial enlarged view of 2B part of FIG. 2.

FIG. 3 is a plane exploded and sectional side view of an embodiment of the present invention.

FIG. 4 is a sectional view of 4S-4S cutting line of FIG. 1.

FIG. 4A is a partial enlarged view of 3A part of FIG. 3.

FIG. 4B is a partial enlarged view of 4B part of FIG. 4.

FIGS. 5, 5A, 5B are operational views of combining the straight bar and the lower cross bar according to an embodiment of the present invention.

FIGS. 6, 6A, 6B are operational views of combining the straight bar and the upper cross bar according to an embodiment of the present invention.

DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION

With reference to FIGS. 1˜3, the guardrail 1 according to an embodiment of the invention comprises a hollow upper cross bar 10 and a hollow lower cross bar 11 (collectively called as cross bars), a plurality of straight bars 12 located between the upper cross bar 10 and the lower cross bar 11.

The embedding openings 101, 111 are respectively configured on an insertion position where the bottom surface 100 of the upper cross bar 10 and the top surface 110 of the lower cross bar 11 are provided for the upper end 120 and the lower end 121 of the straight bar 12 (the upper end 120 and the lower end 121 are collectively referred to as an end portion) to be insert. The two vertical inner walls 102, 112 inside the upper cross bar 10 and the lower cross bar 11 are respectively configured with a buckle plate 13, 14 integrally extending from the vertical inner walls 102, 112, the tail end of the buckle plates 13, 14 have a buckle part 130, 140, and the buckle parts 130, 140 extends obliquely toward a direction away from the embedding openings 101, 111, thereby enabling the buckle parts 130, 140 to have a tilted and elastic pushing and pulling surface, and the distal ends 131, 141 of the buckle parts 130, 140 are located within the bore diameter projection range D, D1 of the embedding openings 101, 111 (as shown in FIG. 3) and the distal ends 131, 141 are in a sharp configuration to enhance the buckle force.

The extending direction of the above buckle plates 13, 14 as shown in FIGS. 3, 4A, 4B, and 5 is firstly that a horizontal section 13a, 14a extends horizontally from the two vertical inner walls 102, 112 inside the upper cross bar 10 and the lower cross bar 11 and further, the end portion of the horizontal sections 13a, 14a vertically extend toward the direction away from the embedding openings 101, 111 to form a vertical section 13b, 14b, the vertical sections 13b, 14b further extends obliquely toward the direction away from the embedding openings 101, 111 to form a buckle parts 130, 140, and the distal ends 131, 141 of the buckle parts 130, 140 fall within the bore diameter projection range D, D1 of the embedding openings 101, 111, thereby enabling the buckle plates 13, 14 and the buckle parts 131, 141 to have a force to clamp toward the bore diameter projection range D, D1.

As shown in FIGS. 5, 5A, 5B, when the lower cross bar 11 is assembled with the lower end 121 of the straight bar 12, the lower end 121 of the straight bar 12 is inserted from the embedding opening 111. The bottom surface of the lower end 121 of the straight bar 12 pushes the tilted pushing and pulling surface corresponding to the buckle part 140 outward, thereby enabling the distal end 141 withdrawing from the bore diameter projection range D1 (as shown in FIG. 5A), and meanwhile, the sharp distal end 141continuously maintains a strong and tight tough with the outer wall of the straight bar 12. When the lower end 121 of the straight bar 12 is inserted completely, the distal ends 141 of the two corresponding buckle parts 140 remain to buckle the left and right outer walls of the lower end 121 of the straight bar 12 via the clamping force thereof and fix the lower end 121 of the straight bar 12. When the upper cross bar 10 is assembled with the upper end 120 of the straight bar 12 a shown in FIGS. 6, 6A, and 6B, the embedding opening 101 of the upper cross bar 10 is provided to insert the upper end 120 of the upper cross bar 10 and the assembly process is similar to the foregoing lower cross bar 11 and the straight bar 12.

The upper cross bar 10 and the lower cross bar 11 of the present invention have same structure and the only modification is made on the assembly direction to be 180 degrees. Therefore, the two can be manufactured with the same set of molds.

As described above, the present invention at least has the following advantages and effects on application.

1. The upper cross bar 10 and the lower cross bar 11 of the present invention have same structure and the only modification is made on the assembly direction to be 180 degrees. Therefore, the two bars can be manufactured with the same set of molds to save manufacturing cost.

2. In the present invention, the sharp distal ends 131, 141 of two corresponding buckle parts 130, 140 are used to buckle the outer wall of the straight bar 12 and the extending direction of the buckle plates 13, 14 enable the two corresponding buckle parts 130, 140 to have a strong clamping force, thereby enabling the straight bar 12 to be inserted into the upper cross bar 10 and the lower cross bar 11 to be combined, and the two corresponding sharp distal ends 131, 141 can tightly clamp and buckle the outer walls of two sides of the straight bar 12. The assembly is easy and convenient with good tightness and stability to avoid the residual gap left.

In summary, the present invention meets the requirements of novelty, inventiveness and practical applicability, and therefore an application for patent is hereby filed according to the law. Your examination and approval will be highly appreciated.

Claims

1. A combination structure of a straight bar and a cross bar of a guardrail, comprising: an embedding opening is configured at a position where the cross bar providing an end part of the straight bar to be inserted;a pair of buckle plates are configured on the two corresponding sides located at a hollow interior of the cross bar and the two sides of the embedding opening; anda buckle part is configured on a tail end of the buckle plate, wherein a distal end of the buckle part falls within a bore diameter projection range of the embedding opening, and the buckle part extends obliquely toward a direction away form away from the embedding opening.

2. The combination structure of the straight bar and the cross bar of the guardrail of claim 1, wherein the buckle plate horizontally extends from the two vertical inner walls inside the cross bar to form a horizontal section and further the horizontal section vertically extends two a direction away from the embedding opening to form a vertical section, and the vertical section further extends toward a direction away from the embedding opening to form the buckle part.

3. The combination structure of the straight bar and the cross bar of the guardrail of claim 1, wherein, the distal end of the buckle part is a sharp shape.

4. The combination structure of the straight bar and the cross bar of the guardrail of claim 1, wherein, when the cross bar is the upper cross bar of the guardrail, the embedding opening is located on a bottom surface of the upper cross bar, and when the cross bar is the lower cross bar of the guardrail, the embedding opening is located on a top surface of the lower cross bar.