JP2006241864A - Bracket for guard fence - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bracket for remarkably improving work efficiency by facilitating work in fixing a post and the bracket when installing a guard fence, particularly omitting extremely difficult work such as determining the position of a nut and holding the nut and bracket with a worker's fingers. <P>SOLUTION: The bracket 2 is formed in approximately cylindrical shape with a beam inserted and fixedly holdable; a fixing hole 4 for allowing a bolt to pass through to fix the bracket to the post; a slit 10 extending in a longitudinal direction facing the fixing hole 4; an opening 8 formed by cutting out a part of the bracket; and a lead-in path 6 connecting the fixing hole 4 to the opening 8. The opening 8 is shaped to allow the screwed bolt and nut to pass through. The lead-in path 6 is shaped to allow the bolt to pass through. The fixing hole 4 is shaped to be conformed to a stepped part of the nut. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a bracket for a protective fence that is used to connect a column and a beam of a protective fence that is installed for the purpose of preventing a fall from a roadway to a river or waterway, or a section of a roadway and a sidewalk.

  This type of guard fence is formed by connecting a column and a beam, and there are many examples in which a connecting member called a bracket is used to connect the column and the beam. FIG. 9 is an explanatory view showing a conventionally used guard fence bracket.

  As shown in FIG. 9, the bracket for the protective fence is a substantially cylindrical body that can be fixedly held by inserting a beam. The bracket 28 is composed of a substantially plate-like flat portion 28a and side portions 28b and 28b extending slightly open from the opposite edges of the flat portion 28a to one side, and the ends of the side portions 28b and 28b are abutted. The slit 10 is not in contact. The flat portion 28a is provided with a bolt insertion fixing hole 4 for fixing the protective fence bracket 28 to the column with bolts and nuts, and the beam fixing holes 12 for fixing the beam are provided on the side portions 28b and 28b. Is provided. Both corners on the flat portion 28a side of the bracket 28 are cut obliquely.

  The guard fence bracket 28 is fixed to a support (not shown), and the beam is connected to the support by a method of fixing a beam (not shown) to the fixed bracket 28. The procedure for connecting and fixing the protective fence bracket 28 to the support is as follows.

  First, hold the bracket 28 with both hands, align the position of the through hole of the support column and the fixing hole 4 of the bracket 28, and hold the bracket 28 with one hand while keeping the two fingers of the other hand. Then, a nut (not shown) is picked and the nut is inserted into the bracket 28. Then, the nut is moved at the tip of the finger so that the positions of the fixing hole 4 of the bracket 28 and the screw hole of the nut coincide with each other, and at the same time, the bracket 28 is pressed against the support with the hand on the side of the finger. Hold in that position.

  Next, the other hand holding the bracket 28 is released and a bolt (not shown) is gripped. The bolt is passed through the through hole of the support post and further passed through the fixing hole 4 of the guard fence bracket 28. Since the tip of the bolt passes through the fixing hole 4 of the guard fence bracket 28 and comes into contact with the screw hole of the nut, the bolt and the nut are screwed together and fastened to fasten the bracket 28 to the support column.

  However, since the bracket 28 is generally formed of the same steel material as that of the support or beam, the bracket 28 has a certain weight although there is a difference in shape and structure. As described above, holding the entire bracket while keeping the positions of the fixing hole 4 and the screw hole of the nut in the bracket 28 with fingers is very difficult and troublesome for the operator.

  Also, if the hand held by the weight of the bracket 28 shakes, the position of the screw hole of the nut and the position of the bracket 28 will shift, and the position must be adjusted again, which is very inefficient. There was also a problem.

  In addition, in order to insert a finger into the bracket 28, the bracket 28 has to have a certain protruding width. However, if the bracket 28 is provided with a protruding width, there is a problem that the space between the column and the beam is widened, and the installation space for the protective fence is increased. In particular, when a beam is provided on the sidewalk side, the sidewalk feels narrow.

  In addition, the usual protective fence installation work is performed by workers wearing gloves. However, when wearing gloves, it is very difficult to grasp the bolts and nuts. Also, in order to make the screw hole of the nut coincide with the fixing hole, the sense of the fingertip of the operator is important. However, when the gloves are worn, the sense of the fingertip becomes dull and it is difficult to determine the position. It was.

  Although there was a case where the work was performed with bare hands, the work with bare hands is not preferable because there is a risk of injury. Furthermore, during cold weather such as winter, there are problems that the bracket 28 is cooled and cannot be held with bare hands, or that the work cannot be performed as if the fingertips are stubborn.

  In addition, there are proposals and inventions that make it easier to determine and hold the position of the nut and bracket 28 described above. However, if any member is provided on the bracket 28 or a new structure is used, the manufacturing cost of the bracket 28 increases. The problem will arise.

  From the above, the work of fixing the bracket 28 to the support column is very easy. In particular, work efficiency is improved by omitting difficult work for the operator such as position determination and holding of the nut in the bracket 28 and holding of the bracket 28. Therefore, it has been desired to develop a bracket that is very easy to manufacture.

  In order to solve the above-described problems, a bracket for a protective fence according to the present invention is a bracket for connecting and fixing a column and a beam constituting the protective fence to each other, and the bracket is a substantially cylindrical tube having an inner diameter into which the beam can be inserted. A fixing hole for inserting a bolt for fixing the bracket to the column with a bolt and a nut, a slit provided substantially parallel to the central axis of the bracket at a position opposed to the fixing hole, An opening part of which is cut out, an introduction path connecting the fixing hole and the opening part, and a beam fixing hole for fixing the end of the inserted beam, the introduction path of the bracket It is provided in the circumferential direction.

  Preferably, the opening has a size and shape that allows a screwed nut to pass along with the tip of the bolt, and the introduction path has a width that allows the screw of the bolt to pass. .

  Further, the fixing hole has an elliptical shape, and a step portion is provided at one end of the nut of the bolt and nut for attaching the bracket to the column, and the step portion is fitted into the fixing hole. It is preferable to have an elliptical shape and shape.

  Moreover, it is preferable that the long diameter of the said fixed hole is substantially parallel to the axial direction of the said bracket, and the width | variety of the said introduction path is narrower than the long diameter of the said fixed hole.

  The bracket includes a substantially plate-like flat portion and a pair of opposing side portions extending from one opposite side of the substantially plate-like surface to the fixing hole and the introduction path. It may be provided in a flat portion, and the opening may be provided in a portion of the side portion that is biased toward the flat portion.

  Since the bracket for a protective fence according to the present invention has a fixing hole, an opening, and an introduction path connecting the fixing hole and the opening, the bolt is fixed from outside the bracket without penetrating the bolt into the fixing hole. It can be introduced into the hole. In addition, the opening has a shape through which the screwed bolt and nut can pass, and the introduction path has a width through which the screw threaded portion of the bolt can pass. It can be introduced into the fixing hole.

  As a result, the bolt can be passed through the column in advance, the bolt and nut are screwed together, the bolt can be introduced into the fixing hole just by lowering the bracket with the opening downward from above the screwed part, and then turning the bolt only The column and bracket can be fastened and fixed. Therefore, the column and bracket fixing operation and the protective fence installation operation are simple and easy, and the work efficiency is remarkably improved.

  In addition, an elliptical stepped portion is provided at the end of the nut, and the fixing hole has a shape that matches the stepped portion, and the nut can be held by matching the stepped portion and the fixing hole. Even if the nut is not held with a finger or a wrench, the bolt can be fastened and fixed without spinning, and the fixing work between the support column and the bracket can be performed more easily.

  In this way, since the work process of bracket fixing work and protective fence installation work can be simplified and simplified, anyone can work regardless of the dexterity and skill level of the operator's hands, reducing costs and shortening the work period Can contribute.

  In addition, since it is not necessary to insert a finger into the bracket and hold the nut, the operator can easily work even when wearing a work gloves, and there is no risk of injury to the operator. Work can be done regardless.

  Furthermore, the bracket can be formed with a smaller protruding width than the conventional one, and a space-saving protective fence in which the support column and the beam are brought close can be provided. Furthermore, since the protruding width of the bracket can be reduced, it is possible to contribute to cost reduction.

  The protective fence bracket 2 according to the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view showing a guard fence bracket 2 according to the present invention, and FIG. 2 is a front view showing the guard fence bracket 2 according to the present invention. In addition, these figures are only for demonstrating this invention, and do not limit this invention at all.

  The protective fence bracket 2 according to the present invention is a substantially cylindrical body in which a beam 26 can be inserted and fixed. The bracket 2 shown in FIG. 1 includes a substantially plate-like flat portion 2a and a pair of opposing side portions 2b and 2b extending in a slightly opened state from one opposite side to the opposite edge of the flat portion 2a. Thus, the front sides of the side portions 2b and 2b are curved to form a substantially cylindrical body.

  The curved state of the front side of the side portions 2 b and 2 b can be changed according to the shape of the beam 26. For example, when the elliptical beam 26 is used, the shape may be adapted to the elliptical shape, and when the substantially rectangular beam 26 is used, the shape may be adapted to the angular shape. The material, dimensions, and the like of the bracket 2 are not particularly limited and may be appropriately set in consideration of various conditions.

  Further, the flat portion 2a is provided with a fixing hole 4 for fixing the bracket 2 to the column 22 through the bolt 14, and the side portions 2b and 2b are provided with an opening portion 8 which is partially cut away. The opening 8 is connected by the introduction path 6. The front sides of the side portions 2b and 2b are not in contact with each other, and a slight gap is formed to form the slit 10.

  The fixing hole 4 is a hole for fixing the bracket 2 to the support column 22 through the bolt 14. The shape and formation position of the fixing hole 4 may be appropriately set in consideration of the fixing position of the bracket 2 and the support column 22, the state of fixing and holding, the shape of the bolt 14 and the nut 16, and the like.

  For example, the shape of the fixing hole 4 may be elliptical as shown in FIG. This elliptical shape is a shape that matches the elliptical stepped portion 18 provided at the end of the nut 16 shown in FIG. By matching the elliptical stepped portion 18 and the fixing hole 4, the nut 16 is held by the fixing hole 4 without holding the nut 16 with a finger or a wrench. Even if the bolt 14 is turned, the nut 16 is held in the fixing hole 4. The nut 16 can be fastened without idling.

  Moreover, the opening part 8 of the bracket 2 for guard fences which concerns on this invention is formed by notching a part of side part 2b. Although the formation position of the opening 8 is not particularly limited, it is preferable that the opening 8 is formed by cutting out the middle part of the side part 2b as shown in FIG. The shape of the opening 8 is not particularly limited, but it may have a shape and size through which the screwed bolt 14 and nut 16 can pass.

  The shape and size through which the screwed bolt 14 and nut 16 can pass are such that the bolt 14 and nut 16 enter the opening 8 when the opening 8 is put on the screwed bolt 14 and nut 16. Shape.

  In addition, the introduction path 6 of the protective fence bracket 2 according to the present invention is a hole connecting the fixing hole 4 and the opening 8 and extends along the periphery of the bracket. The shape and formation position of the introduction path 6 are not particularly limited, and may be set as appropriate. Further, the width of the introduction path 6 is preferably such that the screw portion of the bolt 14 that fixes the column 22 and the bracket 2 can move through the introduction path 6.

  Further, the diameter of the fixed hole 4 and the width of the introduction path 6 are a> b as shown in FIG. 2, where a is the long diameter of the fixed hole 4 and b is the width of the introduction path 6. As a result, when the nut 16 shown in FIG. 3 is used, the stepped portion 18 of the nut 16 that matches the fixing hole 4 does not come off to the introduction path 6 side.

  In addition, the slit 10 of the protective fence bracket 2 according to the present invention is provided at a position facing the fixing hole 4 of the bracket 2 toward the longitudinal direction of the bracket 2. Further, the width of the slit 10 may be appropriately set in consideration of the movable range of the bracket 2 when the beam 26 is inserted and fixed to the bracket 2.

  The bracket 2 is provided with a pair of opposed beam fixing holes 12. The shape, formation position, etc. of the beam fixing hole 12 may be set as appropriate.

  Next, the installation method of the guard fence 20 using the bracket 2 for guard fences which concerns on this invention is demonstrated, referring FIG.4 and FIG.5.

  First, after the support column 22 is set in a predetermined position in advance, as shown in FIG. 4A, the bolt 14 is passed through the through hole 24 of the support column 22, and the nut 16 is screwed to some extent.

  Next, as shown in FIG. 4B, the opening 8 of the bracket 2 is held downward, and the bracket 2 is moved above the bolts 14 and nuts 16 that are screwed together. The bracket 2 is lowered as it is, and the bolt 14 and the nut 16 are introduced into the bracket 2 from the opening 8. Further, the bracket 2 is lowered, and when the screw portion of the bolt 14 moves from the introduction path 6 to the fixing hole 4, the bracket 2 is held at one end.

  Next, the step portion 18 of the nut 16 is aligned with the fixing hole 4 of the bracket 2. As shown in FIG. 5 (3), this may be achieved by pulling out the bolt 14 penetrating the column 22 or moving the holding bracket 2 to the nut 16 side along the bolt 14. . If the stepped portion 18 of the nut 16 does not match the fixing hole 4, the bolt 14 is slightly rotated, or a finger is inserted from the opening 8 and the nut 16 is picked and rotated to fix the stepped portion 18. The holes 4 can be matched.

  Then, as shown in FIG. 5 (4), if the bolt 14 is rotated while holding the bracket 2, the nut 16 moves to the side of the column 22, and the bracket 2 is fixed to the column 22. At this time, since the stepped portion 18 of the nut 16 and the fixing hole 4 are matched and the nut 16 is fixedly held by the fixing hole 4, the nut 16 can be fastened by simply turning the bolt 14 without spinning. And if the bracket 2 and the beam 26 are fixed, it will become a structure as shown in FIG.

  By repeating the above operation, the guard fence 20 shown in FIGS. 6 and 8 can be installed. The larger the number of columns 22, beams 26, and brackets 2 constituting the protective fence 20 to be installed, the more the case where the bracket 2 for protective fence according to the present invention is used than the case where the conventional one is used. Work time is shortened.

  The above is the description of the protective fence bracket 2 according to the present invention, but various conditions and settings can be changed without departing from the object of the present invention. For example, after the support column 22 and the bracket 2 are fixed, any auxiliary member that covers the opening 8 and the introduction path 6 may be provided.

It is explanatory drawing which showed the bracket for protective fences which concerns on this invention. It is the front view which showed the bracket for protective fences which concerns on this invention. It is explanatory drawing which showed the volt | bolt and nut which are used for the bracket for protective fences and support | pillar which concern on this invention. It is explanatory drawing which showed the bracket for protective fences which concerns on this invention, and the fixing method of a support | pillar. It is explanatory drawing which showed the bracket for protective fences which concerns on this invention, and the fixing method of a support | pillar. It is explanatory drawing which showed the guard using the bracket for guards concerning this invention. It is the fragmentary sectional view which showed the bracket for protective fences which concerns on this invention, and the fixed state of the support | pillar. It is explanatory drawing which showed one Embodiment of the protection fence which uses the bracket for protection fences concerning this invention. It is explanatory drawing which showed the bracket for guard fences conventionally used.

Explanation of symbols

2 Bracket 2a Flat part 2b Side part 4 Fixing hole 6 Introduction path 8 Opening part 10 Slit 12 Beam fixing hole 14 Bolt 16 Nut 18 Step part 20 Protective fence 22 Post 24 Through hole 26 Beam 28 Bracket (conventional use)
28a flat part 28b side part

Claims (5)

  A bracket for connecting and fixing a support pillar and a beam constituting the protective fence to each other. The bracket is formed of a substantially cylindrical body having an inner diameter into which the beam can be inserted, and a bolt for fixing the bracket to the support post by a bolt and a nut. A fixing hole for insertion; a slit provided substantially parallel to the central axis of the bracket at a position opposed to the fixing hole; an opening portion in which a part of the bracket is cut; the fixing hole and the opening portion; And a beam fixing hole for fixing the end of the inserted beam, and the introduction channel is provided in the circumferential direction of the bracket.   The opening has a size and shape that allows a screwed nut to pass along with a front end of a bolt, and the introduction path has a width that allows a threaded portion of the bolt to pass. The bracket for a protective fence according to claim 1.   The fixing hole has an elliptical shape, and a step portion is provided at one end of the nut of the bolt and nut for attaching the bracket to the column, and the step portion is sized to fit into the fixing hole. The bracket for a protective fence according to claim 1 or 2, wherein the bracket has an elliptical shape.   4. The protective fence according to claim 3, wherein a major axis of the fixing hole is substantially parallel to an axial direction of the bracket, and a width of the introduction path is narrower than a major axis of the fixing hole. bracket.   The bracket includes a substantially plate-like flat portion and a pair of opposing side portions extending from the opposite edge portions of the substantially plate-like surface to one side, and the fixing hole and the introduction path are the flat portion. The bracket for a protective fence according to any one of claims 1 to 4, wherein the opening is provided at a portion of the side portion that is biased toward the flat portion.

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