JP2011038363A - Guard fence, construction method for guard fence, and nut holding member used for guard fence - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a guard fence which enables bolt joint for mounting a beam pipe to a support column with a nut holding member inserted into the hollow section of the beam pipe. <P>SOLUTION: The nut holding member 4 includes a nut fitting section having a shape restricting its movement in each direction orthogonal to the pipe shaft of the beam pipe 3 and holding the nut in a rotation preventive state. The nut holding member 4 is inserted from the end of the beam pipe 3 to the corresponding position in the hollow section of the beam pipe with an insertion jig, and is positioned at the position where the bolt hole of the beam pipe matches with the nut. The bolt hole of a bracket 2 mounted to the support column 1 is matched with the bolt hole of the beam pipe, and the bolt 9 inserted through the two bolt holes is screwed in the nut held with the nut holding member 4 into connection. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention belongs to the technical field of a guard fence using a beam pipe, a method for constructing the same, and a nut holding member used for the guard fence, and more specifically, a beam pipe to a bracket of an intermediate strut located at an intermediate portion in the longitudinal direction of the beam pipe. Bolt joints for attaching the intermediate part of the above were performed using nuts held by nut holding members inserted into the corresponding positions of the pillars in the hollow part of the beam pipe, and a protective fence with high design and landscape, and high safety It is related with the construction method and the nut holding member used for a guard fence.

2. Description of the Related Art Conventionally, a protection fence in which the beam pipe is attached to a bracket attached to a support by bolting and a construction method thereof have been widely used.
The beam pipe guard fence is so small that the beam pipe cannot be inserted by a human hand, and it is difficult or impossible to hold the nut for bolt connection in the hollow part of the beam pipe. Techniques using members have been proposed.

For example, the road guard fence disclosed in Patent Document 1 below has a nut fixed to a flat plate and a suction cup attached to the flat plate when the joint pipe and beam pipe supported by the column are bolted together. A configuration is disclosed in which a nut holding member is configured, the nut holding member is inserted into the joint pipe, a suction cup is adsorbed to determine the positions of the flat plate and the nut, and the bolt can be joined.
However, if the nut holding member is a beam pipe having a circular cross section, the suction surface is arcuate, and it is difficult to firmly suck the suction cup of the connector to a desired position. In general, the inner surface of the beam pipe is often a rough surface that is not polished, and it is difficult to adsorb the suction plate in the first place.

  Further, the road guard fence disclosed in the following Patent Document 2 is fixed by caulking a nut in a groove of a holding member having a groove shape in cross section when bolting the joint pipe and the beam pipe supported by the column. After inserting the nut holding member into the joint pipe and matching the position of the nut and bolt hole, the nut holding member is positioned to the joint pipe by means such as riveting or tapping screw fastening and bolted. A configuration is disclosed.

  However, in order to fix the nut in the groove of the groove-shaped holding material, caulking is required, which takes time for processing, and thus costs increase. In addition, the nut holding member is inserted into the joint pipe, the position of the nut and bolt hole is matched, and the nut holding member is positioned and fixed by means such as riveting or tapping screw fastening. Technical skill, a lot of processing effort and construction cost are required.

Japanese Utility Model Publication No. 55-48909 Japanese Utility Model Publication No. 2-6717

In Patent Documents 1 and 2 described above, the hollow portion of the beam pipe constituting the protective fence is so small that a human hand cannot be inserted, or a nut for bolt connection is inserted into the hollow portion of the beam pipe. As means for coping with bolt joining when it is difficult or impossible to hold, solutions according to the respective bolt joining conditions have been proposed.
However, the problem commonly seen in each prior art is that the nut holding member is inserted into the hollow portion of the beam pipe, the position of the nut is matched with the bolt hole, and the means for positioning and holding in a stable state is difficult. However, it has been pointed out that the work efficiency is poor and the construction accuracy varies.
In particular, there is a high degree of difficulty regarding the positioning of the nut holding member used for the bolt connection between the bracket of the intermediate strut located at the intermediate portion of the length of the beam pipe (typically about 4 m) and the beam pipe, and a solution for this is desired.
Therefore, it is important to construct a protective fence using a nut holding member effective for bolting the intermediate portion of the beam pipe to the bracket of the intermediate column. However, there is still no effective technique for solving the above problems, and there is no disclosure.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, using a nut holding member effective for bolting an intermediate portion of a beam pipe to a bracket of an intermediate strut, and the nut holding member An object of the present invention is to provide a protection fence and a construction method constructed by adopting means for appropriately positioning the inside of the hollow portion of the beam pipe, and a nut holding member used for the protection fence.
The next object of the present invention is a configuration that does not generate protrusions such as bolt heads that are easy to hook clothes and bags by hitting passersby on the upper surface side of the beam pipe, and even when viewed from the outside of the roadway or the roadway type, Bolt heads, nuts, or bolt shafts are exposed as little as possible, hard to enter the field of view, excellent in design and landscape, and have a safe guard fence that does not protrude from the nut, and a construction method, and a nut holding member used in the guard fence It is to provide.

As means for solving the above problems, a protective fence according to the invention described in claim 1 is:
A bracket that attaches a bracket to a column and a bolt that attaches a beam pipe to the bracket is a protective fence that performs with a nut held by a nut holding member inserted into the hollow portion of the beam pipe,
The nut holding member has a shape in which movement in each direction orthogonal to the tube axis of the beam pipe is limited, and includes a nut fitting portion that holds the nut in a non-rotating state, and the nut holding member is The beam pipe is inserted from the end of the beam pipe into the corresponding position of the pillar in the hollow part of the beam pipe by an insertion jig, positioned at a position where the bolt hole and the nut of the beam pipe match, and the bolt hole of the bracket attached to the pillar. The bolt hole of the beam pipe is matched, and the bolt inserted through the two bolt holes is screwed and joined to the nut held by the nut holding member.

The invention according to claim 2 is the protective fence according to claim 1,
The insertion jig is provided with a connecting portion that connects the nut holding member at the tip, and an insertion stopper is attached at a length position that reaches the bolt hole provided at the corresponding position of the beam pipe column. Features.

The invention according to claim 3 is a configuration in which the nut holding member and the insertion jig are detachably connected in the guard fence according to claim 1 or 2,
The rear end surface of the nut holding member in the insertion direction and the front end surface of the connecting portion of the insertion jig are provided with a hooking portion and a hooking portion that are configured to hang only by rotation in one direction, and are attached and detached. It is a possible configuration.

The invention according to claim 4 is the protective fence according to any one of claims 1 to 3,
In the center part of the rear end surface of the nut holding member and the center part of the tip part of the insertion jig, a pin part and a pin hole part that can be fitted are formed in a pair.

The invention according to claim 5 is the protective fence according to any one of claims 1 to 4,
The nut holding member includes positioning means for stopping movement of the beam pipe in the longitudinal direction and the rotation direction.
The invention according to claim 6 is the protective fence according to any one of claims 1 to 5,
Positioning means that stops the movement of the beam pipe in the longitudinal direction and the rotation direction can fit the nut held by the nut holding member into the positioning hole provided in the beam pipe in order to match the bolt hole of the beam pipe Spring-type positioning stopper,
The positioning stopper is provided on an outer peripheral surface of the nut holding member.

The invention according to claim 7 is the protective fence according to any one of claims 1 to 6,
The nut fitting portion of the nut holding member is slightly larger than the outer diameter of the nut, and the bottom surface of the nut is formed to a depth that can be fitted to the center of the nut holding member, and the nut fitted into the nut fitting portion is It is characterized by being held loosely enough not to rotate in the nut fitting portion.
The invention according to claim 8 is the protective fence according to any one of claims 1 to 7,
The bottom surface portion of the nut fitting portion of the nut holding member is provided with a rib for rattling the nut.

The invention according to claim 9 is the protective fence according to any one of claims 1 to 8,
The nut fitting portion of the nut holding member includes a locking portion that prevents the nut from being detached.

The nut holding member according to the invention described in claim 10 is:
A nut holding member that holds the nut inside the pipe,
The nut holding member has a shape in which movement in each direction orthogonal to the tube axis of the tube material is restricted, and includes a nut fitting portion that holds the nut in a non-rotating state, and the inside of the hollow portion of the tube material It is inserted by a jig for insertion, and is positioned at a position where the bolt hole of the tube material and the nut coincide with each other.
The invention according to claim 11 is the nut holding member according to claim 10,
The nut holding member and the insertion jig are detachably connected,
The rear end surface of the nut holding member in the insertion direction and the front end surface of the connecting portion of the insertion jig are provided with a hooking portion and a hooking portion that are configured to hang only by rotation in one direction, and are attached and detached. It is a possible configuration.

The invention according to claim 12 is the nut holding member according to claim 10 or 11,
In the center portion of the rear end surface of the nut holding member and the center portion of the tip end portion of the insertion jig, a pin portion and a pin hole portion that can be fitted are formed in a pair.

The invention according to claim 13 is the nut holding member according to any one of claims 10 to 12,
The nut holding member includes a positioning unit that stops movement of the pipe material in the longitudinal direction and the rotation direction.

The invention according to claim 14 is the nut holding member according to any one of claims 10 to 13,
The positioning means for stopping the movement of the pipe material in the longitudinal direction and the rotation direction is a spring type in which the nut held by the nut holding member can be fitted into the positioning hole provided in the pipe material in order to match the bolt hole of the pipe material Positioning stopper,
The positioning stopper is provided on an outer peripheral surface of the nut holding member.

The invention according to claim 15 is the nut holding member according to any one of claims 10 to 14,
The nut fitting portion of the nut holding member is slightly larger than the outer diameter of the nut, and the bottom surface of the nut is formed to a depth that can be fitted to the center of the nut holding member, and the nut fitted into the nut fitting portion is It is characterized by being held loosely enough not to rotate in the nut fitting portion.

The invention according to claim 16 is the nut holding member according to any one of claims 10 to 15,
The bottom portion of the nut fitting portion is provided with a rib for rattling the nut.
The invention according to claim 17 is the nut holding member according to any one of claims 10 to 16,
The nut fitting portion of the nut holding member includes a locking portion that prevents the nut from being detached.

A construction method of the protective fence according to the invention described in claim 18 is:
A method of constructing a protective fence that uses a nut held by a nut holding member inserted into a corresponding position in the beam pipe hollow part to attach a bracket to the intermediate post and attach an intermediate part of the beam pipe to the bracket. Because
The nut holding member is detachably connected to the tip of the insertion jig, and the insertion jig connected to the nut holding member is inserted from the end of the beam pipe and held in the bolt hole and the nut holding member at the intermediate part. A positioning stage for mating with the formed nut;
Separating the nut holding member positioned at the intermediate portion of the beam pipe and the insertion jig;
The bolt hole of the bracket attached to the intermediate column and the bolt hole of the intermediate part of the beam pipe are matched, and the bolt inserted through the two bolt holes is screwed and joined to the nut held by the nut holding member. To do.

The invention according to claim 19 is the construction method of the protective fence according to claim 18,
The nut holding member and the insertion jig include the arc-shaped wing provided at the center of the rear end face in the insertion direction of the nut holding member and the wing provided on the distal end face of the connecting part of the insertion jig. A hooking portion that allows insertion of the part only by rotation in one direction, and detachably couples both by rotation from the one direction,
At the center of the rear end surface of the nut holding member and the center of the front end of the insertion jig, a pin portion and a pin hole portion that can be fitted are formed in a pair, and then when the nut holding member is inserted, The insertion force is concentrated at the center of the end face.

The invention according to claim 20 is the construction method of the protective fence according to claim 18 or 19,
A spring type positioning stopper provided on the outer peripheral surface of the nut holding member is fitted into a positioning hole provided in the beam pipe, and the bolt hole of the beam pipe and the position of the nut held in the nut holding member are matched. .

The invention described in claims 1 to 20 has the following effects.
A nut holding member comprising a nut fitting portion for holding a nut to be matched with the bolt hole of the beam pipe and a locking portion for preventing the nut from being pulled out is inserted from the end of the beam pipe, and the beam pipe Bolts inserted in the two bolt holes are positioned at positions where the bolt holes and nuts of the intermediate part of the bracket are aligned, and the bolt holes of the bracket previously attached to the intermediate post are aligned with the bolt holes of the intermediate part of the beam pipe. Since the screw is joined to the nut held by the nut holding member, the bolt joining for attaching the intermediate portion of the beam pipe to the intermediate support can be effectively performed using the nut holding member.
Further, since the nut holding member is inserted by the insertion jig, it can be easily inserted and positioned in the hollow portion of the beam pipe.

  The nut holding member is a positioning hole provided in the beam pipe to align the nut held by the nut holding member with the bolt hole of the beam pipe as positioning means for stopping the movement of the beam pipe in the longitudinal direction and the rotation direction. The nut-holding member has a spring-type positioning stopper that can be fitted in, and the insertion jig has a length that reaches a bolt hole provided at an intermediate position of the beam pipe. Since the insertion stopper is attached to the position, the nut holding member's positioning stopper can be fitted into the positioning hole provided in advance in the intermediate position of the beam pipe simply by inserting and operating the insertion jig until it hits the insertion stopper. Therefore, the position of each nut with respect to the bolt hole of the beam pipe can be matched, and the position can be easily maintained. Performing a bolt joint (well or efficiency) cleanly performed accurately.

As means for inserting the nut holding member into the hollow portion of the beam pipe with the insertion jig, the rear end surface of the nut holding member in the insertion direction and the front end surface of the connecting portion of the insertion jig are rotated in one direction. The latching portion and the catching portion having a structure that only crosses each other are provided in a paired arrangement and are detachable. Therefore, when inserting the nut holding member into the hollow portion of the beam pipe, the hook holding portion and the receiving portion provided in a pair on the nut holding member and the insertion jig are rotated, for example, in the right direction. Can be easily hung and can be inserted into the intermediate position of the beam pipe in the connected state. Then, the nut holding member is rotated by rotating the insertion jig in the same direction (right rotation) as the hook of the nut holding member, and the positioning stopper of the nut holding member is fitted into the positioning hole of the beam pipe. it can. In addition, after the positioning of the nut holding member is completed, the insertion jig and the nut holding member can be easily rotated by rotating the insertion jig in the opposite direction to the direction when it is hooked on the nut holding member (left direction). Can be separated.
Further, a pin portion that can be fitted into the central portion of the rear end surface portion of the nut holding member and the central portion of the tip portion of the insertion jig so that the central axes of the nut holding member and the insertion jig coincide with each other. Since the pin hole portions are arranged in a pair, the nut holding member can smoothly move to the corresponding column position without rattling in the hollow portion of the beam pipe.

  The nut fitting portion of the nut holding member is slightly larger than the outer diameter of the nut, and the bottom surface of the nut is formed to a depth that can be fitted to a substantially central position of the nut holding member, and has a sufficient bolt insertion angle. In addition, the nut fitted in the nut fitting part is held loosely enough not to rotate in the nut fitting part, so that the centering and bolting operation of the joining bolt and nut inserted at the time of bolt joining Can be performed freely only by operating the bolts, so that it can be performed accurately and quickly including positioning at the beginning of screw joining (searching or alignment of the screw start end), and a bolt joining operation with high work efficiency can be performed. Furthermore, a rib for rattling the nut is provided on the bottom surface portion of the nut fitting portion so as to create a so-called play of the nut, so that the centering of the joining bolt and the nut and the efficiency of the bolt tightening operation can be dramatically improved.

  In addition, the nut fitting part provided on the nut holding member is formed with an insertion part that is cut out on one side so that the nut can be slid sideways and fitted. Not only is this possible, but it is possible to prevent mistakes such as dropping the nut because it slides in and fits. In addition, it is possible to expect a meat stealing effect that saves a large amount of material used for the molded member of the nut holding member and reduces the weight.

In addition, the bolt joint between the beam pipe and the bracket is also positioned so that the beam pipe is applied to the pipe receiving part of the bracket attached to the column and the bolt hole of the pipe receiving part and the bolt hole of the beam pipe are also matched. Only by operation, the bolt can be inserted into the bolt hole from the back side of the pipe receiving portion and screwed into the corresponding nut of the nut holding member.
That is, the nut holding member holds the number of nuts necessary for the bolt connection between the beam pipe and the bracket in an arrangement that matches the bolt holes provided in the beam pipe and the bracket, in other words, in any desired direction in the three-dimensional direction. Therefore, the above-described bolt joint can be made surely and reliably.

  The bolts that join the bracket and the beam pipe, respectively, have a flat top, and both bolts are screwed upward from the outside lower side of the roadway, so even when viewed from the outside of the sidewalk, Even when viewed from the roadway side, the exposure of bolt heads, nuts, and joints is reduced as much as possible, making it difficult to enter the field of view, and excellent visual design and landscape. As well as the protrusions that are easy to be injured when passers hit the upper surface of the beam pipe as much as possible, the person who caught the beam pipe and walked, or the person who touched the beam pipe It is possible to realize a safe road fence without worrying about hooking clothes and bags.

It is an elevational view showing a guard fence in which an intermediate part of a beam pipe is attached to an intermediate column in which the present invention is implemented. It is the bottom view which showed the protection fence of this invention partially fractured | ruptured. It is the top view which showed the upper part of the said protection fence. FIG. 4 is a front view of the protective fence shown in FIG. 3. It is a side view of the protection fence shown in FIG. FIG. 6 is an enlarged view of the side view shown in FIG. 5. It is the top view which showed an example of the nut holding member. It is sectional drawing of a nut holding member. It is a back perspective view of a nut holding member. It is a figure which shows the whole jig | tool for insertion. It is an enlarged view which shows the structure of the connection part provided in the front-end | tip of the jig | tool for insertion. A and B are reference views showing the point of connection between the nut holding member and the insertion jig. A is a front view showing a stage of inserting a nut holding member connected to an insertion jig into a beam pipe. B is a front view showing a state in which the bolt hole and positioning hole of the beam pipe are aligned with the nut and stopper of the nut holding member. C is a side view of B. FIG.

The present invention is a protective fence in which a bracket 2 is attached to a column 1 and a bolt joint for attaching a beam pipe 3 to the bracket 2 is used by using a nut 5 held by a nut holding member 4 inserted into the beam pipe 3. is there.
The nut holding member 4 has a shape in which movement in each direction orthogonal to the tube axis of the beam pipe is limited, and the nut 5 is prevented from rotating at a position that coincides with the bolt hole 3a of the beam pipe 3. A nut fitting portion 43 to be held and a locking portion 44 for preventing the nut from coming off are provided.
The nut holding member 4 is inserted from the end of the beam pipe 3 and is positioned at a position where the bolt hole 3a and the nut 5 are matched, and the bolt hole of the bracket 2 of the intermediate column 1 and the bolt hole 3a of the beam pipe 3 Match.

Next, the bracket 2 is attached by fastening a nut to the other end of the bolt that is horizontally penetrated from the outside of the roadway toward the roadway side in the support column 1.
The beam pipe 3 in a state where the nut holding member 4 is positioned is applied to a pipe receiving portion 2a protruding from the nut fastening portion of the bracket 2 toward the roadway, and a bolt hole provided in the pipe receiving portion 2a The bolt hole 3a of the beam pipe 3 is matched, and the bolt 9 inserted through the two bolt holes is screwed into the nut 5 held by the nut holding member 4 to construct a protective fence.

Hereinafter, the present invention will be described based on illustrated embodiments.
1 to 6 show a guard fence constructed by using, for example, a nut 5 held by a nut holding member 4 shown in FIG. 7 for attaching a bracket 2 to a support column 1 and attaching a beam pipe 3 to the bracket 2. Example of the present invention is shown.
The present invention is particularly suitable for bolt joining in which a bracket 2 is attached to an intermediate strut 1 (hereinafter simply referred to as a strut 1) located in the middle portion of the length of the beam pipe, and an intermediate portion of the beam pipe 3 is attached to the bracket 2. To be implemented.

First, the structure of the nut holding member 4 used for joining each bolt of the beam pipe 3 of the protective fence will be described. However, the nut holding member 4 described below is not limited to the beam pipe 3 and has a shape and configuration that can be inserted as long as it is a tube material. This will be specifically described below.
As shown in FIG. 7, the nut holding member 4 is formed in a tube shape in which the shape of the outer peripheral surface is smaller than the diameter of the hollow portion of the beam pipe 3. And the positioning means which stops the movement with respect to the longitudinal direction and rotation direction of the beam pipe 3 is provided. That is, the positioning stopper 41 protrudes by a spring type and can be fitted into the positioning hole 3b provided in the beam pipe 3 so as to coincide with the bolt hole 3a of the beam pipe 3 (see FIG. 13). The positioning stopper 41 is a cylindrical protruding member, and normally protrudes from the outer diameter of the nut holding member 4. When pushed, the positioning stopper 41 is a spring material 42 that exhibits elasticity that can be accommodated within the outer diameter of the nut holding member 4. Is provided. Therefore, as will be described later, when the nut holding member 4 is inserted into the hollow portion of the beam pipe 3, the positioning stopper 41 is pushed into the outer diameter of the nut holding member 4 so that the inside of the hollow portion of the beam pipe 3 is inserted. Is inserted into the positioning hole 3b and reaches the positioning hole 3b of the beam pipe 3, the elastic performance of the positioning stopper 41 is exerted to automatically project the positioning hole 3b, and the longitudinal direction and rotation of the beam pipe 3 The movement in the direction can be stopped. By configuring the nut holding member 4 as described above, the nut 5 can be held in a so-called three-dimensional direction in the hollow portion of the beam pipe 3 that is a closed space, and the closed space is difficult to work with a normal nut holding member. Temporary fixing work can be performed very easily.
The shape of the outer peripheral surface for obtaining the positioning means of the nut holding member 4 is not limited to this, and the configuration described below is preferably implemented.

  A nut fitting portion 43 into which the nut 5 is fitted in a non-rotating state is provided on the outer peripheral surface of the nut holding member 4 so as to coincide with the bolt hole 3a (see FIG. 13) of the beam pipe 3. The nut fitting portion 43 includes a locking portion 44 that holds the fitted nut 5 so as not to come off. In short, the nut holding member 4 includes a molding member 40 having a length and an outer diameter capable of holding the nut 5 in an arrangement corresponding to the arrangement of the bolt holes 3a provided in advance in the beam pipe 3 in the tube axis direction and the circumferential direction. It is configured as a subject.

In the case of the illustrated embodiment, the outer peripheral surface of the molding member 40, which is the main body of the nut holding member 4, has an inner diameter of the beam pipe 3 of φ43.8 mm. On the other hand, the movement in each orthogonal direction is limited. Although the shape which contacted the inner peripheral surface of the beam pipe is shown, the shape which has the backlash of the grade which does not impair the function of the positioning means mentioned later may be sufficient.
The molded member 40 of this example is suitable for mass production, can be manufactured lightly at low cost, and is easy to handle, so that it is easy to handle, such as thermosetting or thermoplastic synthetic resin, such as phenol resin, epoxy resin, melamine resin, unsaturated. It can be molded using a polyester resin, a polyurethane resin or the like. In addition, it is also preferable to carry out by molding with low / medium foam or high foam polystyrene resin or polypropylene resin. It can be implemented as a non-foamed synthetic resin, or can be fabricated and implemented as a wooden or metal product.

As described above, the molded member 40 is provided with a nut fitting portion 43 for fitting the nut 5 in a non-rotating state in an arrangement that matches the arrangement of the bolt holes 3 a provided in the beam pipe 3.
Specifically, as shown in FIGS. 7 to 9, the molding member 40 is provided with a nut fitting portion 43 at a fitting position of the nut 5 in a form penetrating in a direction perpendicular to the center line of the molding member 40. (See FIG. 8). The nut fitting portion 43 is formed in a shape and size that are fixed so that the fitted nut 5 does not rotate together during the bolt joining operation.

  The reason why the nut fitting portion 43 is provided in the penetrating form is to reduce the manufacturing cost by reducing the amount of material used for the molded member 40 and reducing the weight. The nut fitting portion 43 is provided in the following configuration as a hexagonal shape having a size that allows the hexagonal nut 5 shown in the figure to be easily inserted and has a margin that can be slightly wobbled at the tip of the bolt that joins the nut 5. Yes. Moreover, if the nut to be used is polygonal shapes other than a hexagon, the shape of a nut fitting part shall also be a shape corresponding to the same shape.

  The depth of the nut fitting portion 43 is set to a depth H at which the bottom surface of the nut 5 can be fitted to the center position L of the nut holding member 4 (see FIG. 8), and at the end of the bottom surface portion of the nut fitting portion 43, The step part 45 which makes the bottom face of the nut 5 sit is formed. The nut 5 fitted in the nut fitting portion 43 is configured to be seated on the stepped portion 45 so as to settle in a non-rotating state. Therefore, the penetration shape and size of the nut fitting portion 43 deeper than the step portion 45 is such that the tip of the bolt screwed into the nut 5 does not hit the inside of the nut fitting portion, and the molded member 40 Form the necessary form of meat theft to achieve the purpose of reducing the amount of material used and reducing the weight. Further, ribs 46 and 46 for rattling the nut 5 are provided on the upper surface of the stepped portion 45. In the illustrated example, it is provided at two locations on opposite sides of the hexagon, but it may be more than that. As described above, the nut fitting portion 43 is configured such that the nut 5 can be fitted to the position of the center position L of the nut holding member 4, and the nut 5 that fits in the bottom portion is further rattled by the rib 46 to form play. As a result, the centering and tightening operation of the joint bolt and nut 5 inserted at the time of the bolt joint can be performed freely only by the operation of the bolt. Therefore, including the initial alignment of the screw joint (search or alignment of the screw start end). It can be performed quickly, and a bolt joining operation with good work efficiency can be performed.

In order to prevent the inconvenience that the nut 5 inserted into the nut fitting portion 43 as described above inadvertently floats and comes off, the nut holding member 4 has a locking portion 44 for holding the upper surface of the nut 5 as follows. It is provided as follows.
In FIGS. 8 and 9, the material of the forming member 40 is formed in a shape that can be elastically deformed at a central portion of one side of the hexagon at a portion slightly lower than the entrance of the nut fitting portion 43. ing. That is, when the nut 5 is inserted into the nut fitting portion 43 by pushing the locking portion 44 of the nut fitting portion 43 in an elastically deformable shape, the locking portion 44 immediately works and stops. Prevent it from rising or falling off. However, the used nut 5 can be easily removed and recovered by pushing the locking portion 44 a little.

  The nut 5 is fitted at a depth H at which the bottom surface of the nut 5 can be fitted to the center position L of the nut holding member 4, and is locked by the locking portion 44, and the bolt 9 is screwed into the nut 5. As a result, the nut 5 approaches the bolt 9 side. Then, the force of the nut 5 approaching the bolt 9 side acts on the locking portion 44, and the locking portion 44 opens to the outside of the nut 5 and comes off. Subsequently, by continuing screwing of the bolt 9, the nut 5 approaches the bolt 9 side as it is, contacts the beam pipe 3, and the bolt 9 and the nut 5 are fastened.

The nut holding member 4 having the above configuration is connected to the insertion jig 6 and inserted into an intermediate position in the hollow portion of the beam pipe 3. Hereinafter, the connection means and the insertion method will be described.
The nut holding member 4 and the insertion jig 6 are provided with a latching portion 47a and a catching portion 61, which are configured to be hooked only by rotation in one direction, and are configured to be detachable. In the illustrated example, a case will be described in which the hooking portion 47a is provided on the rear end surface of the nut holding member 4 in the insertion direction and the hooking portion 61 is provided on the front end surface of the insertion jig 6. Of course, the present invention is not limited to this, and it is also possible to carry out the present invention with the opposite configuration.
As shown in FIG. 9, the nut holding member 4 is connected to the insertion jig 6 on the rear end surface 47 with respect to the insertion direction of the nut holding member 4 in two arc-shaped hanging portions 47 a. (Hereinafter also referred to as wings 47a and 47a) are provided so as to face each other with respect to the central axis. The wing portion 47a has an arc shape obtained by cutting a circle into a quarter, and is attached symmetrically like a butterfly wing.

As shown in FIGS. 10 and 11, the insertion jig 6 is a rod-like member that can be inserted into the hollow portion of the beam pipe 3, and a connecting portion 60 that connects the nut holding member 4 is provided at the tip thereof. A saddle-shaped insertion stopper 63 is attached to a length position that reaches a bolt hole provided at a position corresponding to the support of the beam pipe.
On the front end surface of the connecting portion 60, hooking portions 61 and 61 that allow the wing portion 47a to be fitted from one direction of rotation are provided in a shape and a position where the wing portion 47a can be fitted. Yes. That is, as shown in FIGS. 12A and 12B, the hook 61 of the insertion jig 6 is hooked by rotating it clockwise to the wing 47a of the nut holding member 4, and can be easily detached by rotating it counterclockwise. It is a detachable connection structure that can be made. Generally, it is a coupling mechanism used for connecting a ceiling light.
The shape of the illustrated hook-shaped hanging portion 47a and the receiving portion 61 that receives the feather portion 47a is not limited to the above, and any shape can be used as long as it is a shape that can be hooked together.

  Further, in order to facilitate attachment and detachment of both members by rotation, and to smoothly move the nut holding member 4 in the beam pipe 3, the center portion of the rear end surface 47 of the nut holding member 4 and an insertion jig are used. A pin portion and a pin receiving portion that can be fitted are paired with each other so that the rotation axes of the nut holding member 4 and the insertion jig 6 do not coincide with each other. In the illustrated example, the nut holding member 4 is provided with a convex pin portion 48, and the insertion jig 6 is provided with a concave pin receiving portion 62. Of course, this is not restrictive. You may implement by the structure of.

  The nut holding member 4 connected to the insertion jig 6 as described above is inserted into the hollow portion of the beam pipe 3 as shown in FIG. 13A. At this time, the positioning stopper 41 of the nut holding member 4 is pushed into the outer diameter of the nut holding member 4 and inserted. When it is inserted until the end of the beam pipe 3 hits the insertion stopper 63 of the insertion jig 6, it has just reached the middle part of the beam pipe 3. Next, as shown in FIG. 13B, the positioning hole 3b provided in the beam pipe 3 and the positioning stopper 41 of the nut holding member 4 are moved while the insertion jig 6 is rotated in the right direction so that the nut holding member 4 cannot be detached. Match. Then, as shown in FIG. 13C, the stopper 41 protrudes in the positioning hole 3b by an elastic force, and the nut holding member 4 is held at an intermediate portion of the beam pipe 3, and the bolt hole 3a and the nut holding of the beam pipe 3 are held. It is positioned in a state where the position of the nut 5 held by the member 4 matches. Then, the insertion jig 6 is rotated in the reverse direction (left rotation), and the blade portion 47a of the nut holding member 4 is hung from the receiving portion 61 to separate them.

  When the beam pipe 3 has a square shape different from the round shape of the embodiment, the outer shape of the nut holding member 4 moves in each direction orthogonal to the tube axis of the beam pipe so as to match the square shape of the beam pipe 3. The shape is limited. In this case, the nut holding member 4 is attached to the beam pipe 3 by the insertion jig 6 so that the positioning stopper 41 of the nut holding member 4 is oriented so that it is on the same surface as the positioning hole 3 b provided in the beam pipe 3. Inserted. If the positioning hole 3b and the positioning stopper 41 are arranged so as to be coaxial with each other in the extension direction of the beam pipe 3, the positioning stopper 41 protrudes into the positioning hole 3b only by inserting the nut holding member 4 to the fixed position, and the nut holding The positioning of the member 4 is completed.

Next, bolt connection for attaching the beam pipe 3 to the intermediate column 1 using the nut holding member 4 positioned at the intermediate portion of the beam pipe 3 as described above will be described with reference to FIGS. .
First, prior to the above-described bolt joining operation, the bracket 2 is attached to the upper end of the intermediate strut 1 in advance with a bolt 7 and a nut 8 that penetrate the upper end portion in the horizontal direction (diameter line direction) toward the roadway side. ing.

  The other end of the bolt 7 and the nut 8 fastened to the other end are, as shown in FIGS. 1, 2, and 6, above the fixing portion of the bracket 2 fixed to the column with the bolt 7 and the nut 8. The upper surface portion is covered with a pipe receiving portion 2a that protrudes toward the roadway while bypassing the portion, and the pipe receiving portion 2a that protrudes toward the roadway while bypassing the upper portion from the fixed portion of the bracket 2 The side surfaces are covered with reinforcing metal fittings 2b and 2b fitted from the lateral direction into the gaps formed by. Accordingly, since the shaft portion of the bolt 7 and the nut 8 are completely contained in the bracket 2 and are difficult to visually recognize, the design and the landscape are excellent.

  Further, the nut 8 is prevented from rotating by sandwiching two parallel sides by the reinforcing metal fittings 2b and 2b, and one side of the nut 8 is rotated by a lip 2c in which the lower side of the fixing portion of the bracket 2 is folded back into a substantially V shape. It is configured to be stopped. Of course, the present invention is not limited to this, and a configuration in which only the reinforcing metal fittings 2b and 2b can prevent the rotation of the nut 8 may be used. It can be implemented in a regularized configuration.

  As described above, on the front surface of the bracket 2 attached to the intermediate support column 1, a pipe receiving portion 2a that is curved in a concave shape with the same curvature as the outer shape of the beam pipe 3 is provided. The intermediate portion of the beam pipe 3 is applied to the pipe receiving portion 2a as described above. Then, a bolt hole (not shown) provided in advance in the pipe receiving portion 2a on the front surface of the bracket 2 and the bolt hole 3a of the beam pipe 3 are matched to each other from the bottom side of the pipe receiving portion 2a. By inserting the bolt 9 into the bolt hole and screwing and fastening it to the corresponding nut 5 of the nut holding member 4, the beam pipe 3 and the bracket 2 can be firmly joined to each other in an integral relationship. The bolt 9 has a flat top and a thin head, and is screwed upward from the outer lower surface side of the roadway (see FIGS. 2 and 4). Therefore, protrusions that are easy for a passerby to hit the upper surface side of the beam pipe 3 and easily hook clothes or bags are eliminated as much as possible. In this case, each nut 5 held by the nut holding member 4 is held in a non-rotating state, and the nut 5 is held in a slightly glazed state with respect to each nut fitting portion 43, Further, since the insertion angle of the bolt 9 is widened by being held at the depth of the central position of the nut holding member 4, the tip of the bolt 9 inserted through the bolt hole is slightly more than the corresponding nut 5 of the nut holding member 4. The screw can be easily operated by finding the starting end of the screw by operating in a state where the core runs out, and an efficient bolt joining operation can be carried out.

  Although the present invention has been described based on the illustrated embodiment, the present invention is not limited to the configuration of the above embodiment. It should be noted that it includes a range of design changes and application variations made by those skilled in the art as needed without departing from the scope and purpose of the invention.

DESCRIPTION OF SYMBOLS 1 Intermediate support | pillar 2 Bracket 3 Beam pipe 3a Bolt hole 3b Positioning hole 4 Nut holding member 41 Positioning stopper 43 Engagement part 44 Locking part 47a Hanging part 48 Pin part 5 Nut 6 Inserting jig 60 Connection part 61 Hanging receiving part 62 Pin receiving part 63 Insertion stopper

Claims (20)

A bracket that attaches a bracket to a column and a bolt that attaches a beam pipe to the bracket is a protective fence that performs with a nut held by a nut holding member inserted into the hollow portion of the beam pipe,
The nut holding member has a shape in which movement in each direction orthogonal to the tube axis of the beam pipe is limited, and includes a nut fitting portion that holds the nut in a non-rotating state, and the nut holding member is The beam pipe is inserted from the end of the beam pipe into the corresponding position of the pillar in the hollow part of the beam pipe by an insertion jig, positioned at a position where the bolt hole and the nut of the beam pipe match, and the bolt hole of the bracket attached to the pillar. A protective fence, wherein the bolt holes of the beam pipe are aligned with each other and the bolts inserted through the two bolt holes are screwed and joined to the nuts held by the nut holding members.   The insertion jig is provided with a connecting portion that connects the nut holding member at the tip, and an insertion stopper is attached at a length position that reaches the bolt hole provided at the corresponding position of the beam pipe column. The protective fence according to claim 1, characterized in that The nut holding member and the insertion jig are detachably connected,
The rear end surface of the nut holding member in the insertion direction and the front end surface of the connecting portion of the insertion jig are provided with a hooking portion and a hooking portion that are configured to hang only by rotation in one direction, and are attached and detached. The protective fence according to claim 1, wherein the protective fence is configured to be possible.   The center part of the rear end face of the nut holding member and the center part of the tip part of the insertion jig are formed so that a pin part and a pin hole part that can be fitted are paired. The protective fence described in any one of -3.   The guard fence according to any one of claims 1 to 4, wherein the nut holding member includes positioning means for stopping movement of the beam pipe in the longitudinal direction and the rotation direction. Positioning means that stops the movement of the beam pipe in the longitudinal direction and the rotation direction can fit the nut held by the nut holding member into the positioning hole provided in the beam pipe in order to match the bolt hole of the beam pipe Spring-type positioning stopper,
The protective fence according to any one of claims 1 to 5, wherein the positioning stopper is provided on an outer peripheral surface of the nut holding member.   The nut fitting portion of the nut holding member is slightly larger than the outer diameter of the nut, and the bottom surface of the nut is formed to a depth that can be fitted to the center of the nut holding member, and the nut fitted into the nut fitting portion is The protective fence according to any one of claims 1 to 6, wherein the protective fence is loosely held so as not to rotate in the nut fitting portion.   The guard fence according to any one of claims 1 to 7, wherein a rib for rattling the nut is provided on a bottom surface portion of the nut fitting portion of the nut holding member.   The protective fence according to any one of claims 1 to 8, wherein the nut fitting portion of the nut holding member includes a locking portion that prevents the nut from being detached. A nut holding member that holds the nut inside the pipe,
The nut holding member has a shape in which movement in each direction orthogonal to the tube axis of the tube material is restricted, and includes a nut fitting portion that holds the nut in a non-rotating state, and the inside of the hollow portion of the tube material A nut holding member, wherein the nut holding member is inserted by a jig for insertion into the tube and positioned at a position where the bolt hole of the pipe material and the nut coincide with each other. The nut holding member and the insertion jig are detachably connected,
The rear end surface of the nut holding member in the insertion direction and the front end surface of the connecting portion of the insertion jig are provided with a hooking portion and a hooking portion that are configured to hang only by rotation in one direction, and are attached and detached. The nut holding member according to claim 10, wherein the nut holding member is configured to be possible.   The center portion of the rear end surface of the nut holding member and the center portion of the tip end portion of the insertion jig are formed so that a pin portion and a pin hole portion that can be fitted are paired. The nut holding member described in 10 or 11.   The nut holding member according to any one of claims 10 to 12, wherein the nut holding member includes positioning means for stopping movement of the pipe material in the longitudinal direction and the rotation direction. The positioning means for stopping the movement of the pipe material in the longitudinal direction and the rotation direction is a spring type in which the nut held by the nut holding member can be fitted into the positioning hole provided in the pipe material in order to match the bolt hole of the pipe material Positioning stopper,
The nut holding member according to claim 10, wherein the positioning stopper is provided on an outer peripheral surface of the nut holding member.   The nut fitting portion of the nut holding member is slightly larger than the outer diameter of the nut, and the bottom surface of the nut is formed to a depth that can be fitted to the center of the nut holding member, and the nut fitted into the nut fitting portion is The nut holding member according to any one of claims 10 to 14, wherein the nut holding member is held loosely so as not to rotate in the nut fitting portion.   The nut holding member according to any one of claims 10 to 15, wherein a rib for rattling the nut is provided on a bottom surface portion of the nut fitting portion.   The nut holding member according to any one of claims 10 to 16, wherein the nut fitting portion of the nut holding member includes a locking portion that prevents the nut from coming off. A method of constructing a protective fence that uses a nut held by a nut holding member inserted into a corresponding position in the beam pipe hollow part to attach a bracket to the intermediate post and attach an intermediate part of the beam pipe to the bracket. Because
The nut holding member is detachably connected to the tip of the insertion jig, and the insertion jig connected to the nut holding member is inserted from the end of the beam pipe and held in the bolt hole and the nut holding member at the intermediate part. A positioning stage for mating with the formed nut;
Separating the nut holding member positioned at the intermediate portion of the beam pipe and the insertion jig;
The bolt hole of the bracket attached to the intermediate column and the bolt hole of the intermediate part of the beam pipe are matched, and the bolt inserted through the two bolt holes is screwed and joined to the nut held by the nut holding member. How to build a protective fence. The nut holding member and the insertion jig include the arc-shaped wing provided at the center of the rear end face in the insertion direction of the nut holding member and the wing provided on the distal end face of the connecting part of the insertion jig. A hooking portion that allows insertion of the part only by rotation in one direction, and detachably couples both by rotation from the one direction,
At the center of the rear end surface of the nut holding member and the center of the front end of the insertion jig, a pin portion and a pin hole portion that can be fitted are formed in a pair, and then when the nut holding member is inserted, The method for constructing a protective fence according to claim 18, wherein the insertion force is concentrated at the center of the end face.   A spring type positioning stopper provided on the outer peripheral surface of the nut holding member is fitted into a positioning hole provided in the beam pipe, and the bolt hole of the beam pipe and the position of the nut held in the nut holding member are matched. The construction method of the protection fence of Claim 18 or 19.

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