JP2001098519A - Bracket for fitting beam to protective fence - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply fit a beam to the stanchion of a protective fence by using a bracket. SOLUTION: Four locking leg pieces 6 and beam holding lugs 7 and corrugated or bellows fin-shaped beam holding lugs 7 shrunk in diameter on the tip side between the locking leg pieces 6 are provided on the back side of a ring body 5 to form a bracket 4 integrally molded with a flexible elastomer. The locking leg pieces 6 are locked into the beam receiving hole 2 of a stanchion 1 to fit the bracket 4, and a beam 3 is inserted and into the opening of the ring body 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective fence and, more particularly, to a beam mounting bracket for a protective fence used for fitting and holding a beam on a column thereof.

[0002]

2. Description of the Related Art For example, Japanese Patent No. 915286 discloses a beam mounting bracket for fitting and holding a beam (also referred to as a beam pipe) to a column of a protective fence.

According to this, the bracket has a ring body formed to be larger in diameter than the beam receiving hole so as to be in contact with the outer periphery of the beam receiving hole on the side surface of the column, and the beam receiving hole protruding from the ring body. And a plurality of legs for both beam installation and a bracket installation forcibly expanding in the beam receiving hole by engaging the beam and engaging the inner side of the beam receiving hole in a biased state. It is formed integrally with metal or hard synthetic resin.

[0004]

In this case, the beam can be efficiently mounted by inserting and holding the beam on the column of the protective fence. However, the leg used for the installation must be fitted with the beam. By the forced expansion by the above, it is assumed that the beam is held together with the installation of the bracket, which is locked inside the peripheral edge of the ring body in a biased state. For example, if this is made of hard synthetic resin, In order to keep the leg pieces in the expanded state and keep receiving the stress, for example, by vibration or impact,
There is a possibility that the tired leg may be damaged and beam retention may be impaired. On the other hand, if a cast product made of metal, for example, is used, excessive force is required to urge the leg to expand. As a result, there is a possibility that the insertion of the beam becomes difficult or there is a possibility that the work for installing the protective fence will be hindered. In addition, the legs are forced to expand by the beam insertion. It is not impossible to hold the beam when the beam is slightly tilted, but it is not appropriate to tilt the beam so that some of the leg pieces are not locked to the ring because the stability of the beam is impaired. As a result, the tolerance of the inclination angle is restricted to a small degree. As a result, the construction of the protective fence, particularly the installation of the support pillar, requires a high degree of accuracy, and the possibility that the construction of the protective fence tends to be complicated is left.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a beam which can stably hold a beam for a long period of time without exerting an unreasonable stress on a leg. It is an object of the present invention to provide a beam mounting bracket for a protective fence that can easily and surely perform construction of the protective fence by expanding a tolerance of a beam inclination with respect to the beam.

[0006]

SUMMARY OF THE INVENTION In accordance with the above-mentioned objects, the present invention provides a method for mounting a bracket on a ring body by attaching a plurality of locking leg pieces and holding a beam therebetween to extend along the circumferential direction of the ring body. It is provided with curved beam holding projections (including band-shaped projections) so that the mounting of the bracket and the beam holding are performed by dedicated portions, respectively, and the entire bracket including the locking leg pieces and the beam holding projections is provided. Integrally molded from a soft or semi-rigid synthetic resin having flexibility, the bracket is mounted in a state that it fits into the beam receiving hole of the column, and an excessive force is prevented from acting on the locking leg. It enables secure mounting and secures the beam without difficulty, and secures a large tolerance for the beam tilt with respect to the support, making the construction of the protective fence simple and reliable. A ring-shaped bracket for fitting and holding a beam into a beam receiving hole penetrating through a side surface of a column, wherein the invention according to claim 1 is provided on the outer periphery of the beam receiving hole. A ring body formed larger in diameter than the beam receiving hole so as to be in contact with the ring body, and protruding from the ring body and fitted into the beam receiving hole so as to be partially hooked and locked inside the peripheral edge of the beam receiving hole. A plurality of locking leg pieces for mounting the bracket on the column and the plurality of locking leg pieces of the ring body are also protruded along the circumferential direction of the ring body to reduce the diameter toward the distal end. And a beam holding projection for holding the beam fitted in the ring body in a sandwiched state by forming the beam into a ring body, and by integrally molding these with a synthetic resin having flexibility. , The invention described in Item 2 is intended to ensure the reliability of the beam insertion and holding by the beam holding projections and to eliminate the possibility that the ease of the beam insertion and holding is impaired by the frictional resistance of the flexible synthetic resin. 2. The beam mounting bracket according to claim 1, wherein the beam holding projection is formed in a wavy or bellows fin shape.
According to the third aspect of the present invention, it is possible to secure a highly durable beam by reliably securing the mounting stability of the bracket and the stability of the insertion and holding of the beam when mounting the beam on the protective fence. In order to show the preferred form of the bracket suitable for
4. The method according to claim 1, wherein four projections are provided on the ring body at a circular pitch, and the beam holding projections are projected so as to form a circular ring intermittently interposed between the four locking leg pieces. The beam mounting bracket of the protective fence according to claim 2, wherein the invention described in claim 4 ensures that the synthetic resin has an appropriate flexibility, secures favorable weather resistance as a protective fence for outdoor installation, and provides a long-term protection. 4. The beam for a protective fence according to claim 1, wherein the synthetic resin of the bracket is made of an olefin-based thermoplastic elastomer so as to enable stable holding of the beam over the protective fence. Mounting brackets are provided as means for solving the above-mentioned problems, respectively, as the gist of the invention.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to the drawings.
Is a beam, 4 is a bracket, and the bracket 4 is
The bracket 4 has a ring shape for fitting and holding the beam 3 in a beam receiving hole 2 provided on the side surface of the column 1. The bracket 4 includes a ring body 5, a locking leg 6 protruding from the ring body 5,
Similarly, a beam holding projection 7 protruding from the ring body 5 is provided, and these are integrally formed of a synthetic resin having flexibility.

At this time, the synthetic resin of the bracket 4 of this embodiment is an olefin-based thermoplastic elastomer, which has a hardness (JIS A) of 50 to 50, for example.
A synthetic resin suitable for use as the bracket 4 by having a favorable flexibility of about 110 degrees, for example, thermoplastic polyurethane, low density polyethylene, EVA,
Among various thermoplastic or thermosetting resins such as soft polyvinyl chloride and urethane elastomer, they are particularly excellent in weather resistance and are most suitable for use in a protective fence A installed outdoors. And integrally molded by injection molding.

The ring body 5 is formed so as to be larger in diameter than the beam receiving hole 2 so as to be in contact with the outer periphery of the beam receiving hole 2 of the support column 1. And a plurality of brackets for mounting the bracket 4 on the column 1 so as to be partially hooked and locked inside the peripheral edge of the beam receiving hole 2.
Similarly, the beam 3 fitted in the ring body 5 is clamped by projecting between the plurality of locking leg pieces 6 of the ring body 5 along the circumferential direction of the ring body 5 and reducing the diameter toward the distal end side. It is to be kept in a shape.

That is, in this example, the ring body 5 of the bracket 4 has an outer diameter of 62 mm with respect to the diameter of the beam receiving hole 2 of the column 1 of 54 mm, and the opening diameter thereof is set to the outer diameter 42 of the beam 3.
The retaining ring 6 and the beam holding projection 7 are provided on the rear side of the circular ring, and the outer peripheral side of the circular ring is supported by a column. 1 so as to contact the outer periphery of the beam receiving hole 2.

In the bracket 4 of the present embodiment, the locking leg pieces 6 are projected from the ring body 5 at four positions at a quarter circle pitch. The rear surface of the ring body 5 is projected at four locations at 90-degree intervals with a width of 1 cm, and has a locking portion bulging toward the outer peripheral direction of the ring body 5 at the tip end thereof. , The pair of opposing pairs bulges large, and the pair of opposing pairs bulges small, and each of the locking units passes through the beam receiving hole 2 so that the locking leg piece 6 is hooked on the inner side of the peripheral edge by its elasticity. At this time, in the case of the locking leg piece 6 in which the locking portion is greatly bulged, the beam receiving hole 2 of the column 1 is provided between the locking portion and the back surface of the ring body 5. A receiving groove for receiving the peripheral edge is formed, and the peripheral edge of the beam receiving hole 2 is fitted into the receiving groove. The mounting bracket 4 are as more firmly and surely performed.

The beam holding projection 7 is provided on the bracket 4 of this embodiment.
In this case, the projection is formed so as to form a circular ring intermittently interposed between the four locking leg pieces 6, and the beam holding projection 7 is formed into a wavy or bellows fin shape at this time. In this example, the beam holding projections 7 are corrugated along the circumferential direction of the ring body 5 so as to fill the space of the locking leg pieces 6 on the back surface between the locking leg pieces 6 of the ring body 5. Four ridges (which may be referred to as four surfaces) are provided so as to form bellows-shaped curved fins, and each of the ridges is inclined inward in the circle to reduce the diameter toward the tip end. In this example, the beam holding projection 7 has a wavy or bellows inner end of, for example, a radius of 1 to 3 mm, and 2 mm in this example, while reducing the diameter to 43 mm. So that it protrudes inward by 4 mm with respect to the opening diameter of When the beam 3 is fitted into the opening of the ring body 5, the inner end of the beam holding projection 7 initially comes into line contact with the beam 3 when the beam 3 is fitted into the opening of the ring body 5. As a result, the beam 3 is securely held in a sandwiched shape as a result of being crushed so as to fit in, and the beam 3 is reliably held in a sandwiched shape. Even when each of the inner ends is crushed, the shape is still maintained, the holding force of the holding shape is sufficiently ensured, and the beam 3 is securely held.

For mounting the beam 3 on the column 1 using the bracket 4, for example, a locking leg 6 is inserted into the beam receiving hole 2 of the column 1, this is locked on the inner side of the periphery thereof, and the beam 3 is attached to the column 1. The beam 4 is inserted into the opening of the bracket 4 and positioned after the bracket 4 is attached, and the beam 3 is held by the beam holding projection 7. At this time, the locking leg 6 of the bracket 7 is attached to the beam receiving hole 2. Adapts to the support and ensures that it is maintained.
Is inclined in the vertical direction or the front-back direction, etc.
The beam holding projection 7 responds to the inclination of the beam 3 by its flexibility, and can reliably hold the bracket 4 without affecting the holding of the bracket 4 by the locking leg 6. The inclination of the beam 3 is 24 ° for a total of 12 ° from the center of the beam receiving hole 2 on the side where the locking portion is slightly protruded, and 12 ° for a total of 6 ° on the side protruding largely. Angles can be made non-directional, so generally the brackets 4 are installed by allowing a total of 24 ° of tilt in the vertical direction and a total of 12 ° in the horizontal direction. Thus, the installation accuracy of the support fence A can be easily eliminated by eliminating the accuracy of the installation of the column 1.

In the drawing, reference numeral 8 denotes a state in which the beam 3 is held by the bracket 4 so as to prevent the beam 3 from coming off.
7 shows a beam fixing pin that penetrates a through hole provided on the tip side of the beam 3.

The illustrated example is as described above, but the number of the locking legs is three or five or more. It is assumed that the beam holding projections are provided between them, and that the locking portions of the locking legs of the above example including this case are swelled to be small and common to each locking leg piece. Including expanding the non-directional correspondence of the inclination angle, forming the beam holding projections with a number of intermittently curved projections, and forming the beam holding projections with curved wall surfaces, etc. In the implementation of the present invention, the specific shapes, structures, materials, their relationships, and additions to the columns, beam receiving holes, brackets, their ring bodies, locking leg pieces, beam holding projections, etc. Various forms can be adopted without departing from the gist of the invention.

[0016]

The present invention is configured as described above.
According to the first aspect of the present invention, it is possible to stably insert and hold a beam for a long period of time without exerting an excessive stress on a leg piece, and to expand a tolerance of a beam inclination with respect to a column, thereby constructing a protective fence. The beam mounting bracket of the protective fence can be provided in a simple and reliable manner, and the invention according to claim 2 secures the reliability of beam insertion and holding by the beam holding projections and increases flexibility. It is possible to eliminate the possibility that the easiness of beam insertion and holding may be impaired due to the frictional resistance of the synthetic resin, and the invention according to claim 3 relates to the mounting stability of the bracket and the beam The invention according to claim 4, wherein a bracket suitable for securing a beam with excellent durability can be ensured with a high degree of stability of fitting and holding. , The synthetic resin, it is possible that with a moderate ones flexibility to ensure preferred weather resistance as fences outdoor installation, enabling stable holding of the beam over time.

[Brief description of the drawings]

FIG. 1 is a front view of a protective fence.

FIG. 2 is a front view of a bracket.

FIG. 3 is a rear view of the bracket.

FIG. 4 is a cross-sectional view showing a state in which a beam is attached.

FIG. 5 is a longitudinal sectional view showing a state in which a beam is attached.

[Explanation of symbols]

 A Protective fence 1 Support 2 Beam receiving hole 3 Beam 4 Bracket 5 Ring body 6 Locking leg piece 7 Beam holding projection 8 Beam fixing pin

Claims (4)

[Claims] 1. A ring-shaped bracket for fitting and holding a beam into a beam receiving hole penetrating through a side surface of a support column, wherein the ring-shaped bracket is formed larger in diameter than the beam receiving hole so as to contact the outer periphery of the beam receiving hole. A ring body, and a plurality of locking legs for bracket installation, which protrude from the ring body, are fitted into the beam receiving hole, are partially hooked and locked inside the peripheral edge of the beam receiving hole, and mount the bracket on a support. The beam fitted into the ring body is sandwiched between the piece and the plurality of locking leg pieces of the ring body by projecting along the circumferential direction of the ring body and reducing the diameter toward the tip side. A beam mounting bracket for a protective fence, comprising: a beam holding projection for holding; and a unit formed integrally with a synthetic resin having flexibility. 2. The beam mounting bracket according to claim 1, wherein said beam holding projection is formed in a wavy or bellows fin shape. 3. A circular ring shape in which four locking leg pieces are projected from the ring body at a quarter circle pitch, and the beam holding projections are intermittently interposed between the four locking leg pieces. The beam mounting bracket for a protective fence according to claim 1 or 2, wherein the beam mounting bracket is protruded from the beam. 4. A beam mounting bracket for a protective fence according to claim 1, wherein the synthetic resin of the bracket is an olefin-based thermoplastic elastomer.