JP5455351B2 - Temporary protective fence installation structure - Google Patents

Description

The present invention relates to an installation structure of a temporary protection fence that is installed for the purpose of preventing a fall accident of an operator or the like at a construction site and a fall accident of an instrument.

  In the construction site of a building having two or more floors, there is an unavoidable location where there is a risk of a worker falling accident or equipment falling accident due to the building being in the building process before completion. . For example, the floor opening of the staircase where the staircase between 1-2 floors and 2-3 floors is planned to be installed, the 2nd floor opening of the entrance atrium hall before the installation of the handrails on the design, and the design fence The land roof peripheral part before installation, etc. corresponds to the place with such a possibility.

  For the above-mentioned dangerous places having a height of 2 m or more, the occupational safety and health law requires that a fall hazard prevention measure such as a handrail be taken. However, according to the report materials as a result of simultaneous access to the wooden house construction site in a certain prefecture, violation cases for this legal requirement seem to be overwhelmingly more than other types of violation cases. Above all, it is pointed out in the industry that there are many accidents of falling from the floor opening of the staircase and falling accidents of equipment.

  Reasons for failure to comply with the laws and regulations relating to the fall hazard prevention measures are due to the lack of indispensability in the construction progress, such as in the pipe scaffolding around the building, and because the installation conditions differ from site to site. The availability of effective materials, the inability to withstand the trouble of designing and building risk prevention measures individually for each site, and sufficient assembly personnel for the risk prevention measures that must be disassembled and removed by the completion of the building There is no room to spend time and time, and the installed risk prevention measures hinder the finishing work at that location.Especially for the floor opening of the staircase, a temporary ladder is installed to frequently raise and lower workers. Because it is frequently used for lifting and unloading building materials, installing dangerous prevention means such as protective fences in this area will cause a significant hindrance to the progress of work. Mention may be made of the reasons.

That is, in order to comply with the installation of the fall risk prevention means, it becomes a problem how much the risk prevention means in which the above disadvantages are eliminated is provided. A typical example of the risk prevention means conventionally provided is as follows.
JP 62-174458 A Japanese Patent No. 2847368 JP-A-8-21055 Japanese Utility Model Publication No. 6-58055

  As for the danger prevention means to be installed in places where workers are allowed to pass through and carry materials, in order to ensure the passage of workers, etc., the danger prevention means itself has a partial opening / closing mechanism and a large opening for passage. Must be provided (see Patent Documents 1 and 2). However, since ensuring the passage of workers and the like and the risk prevention function are contradictory, it is not easy to achieve both. For example, in a measure in which a large opening is set in a part of the danger prevention means and a rope that can be easily removed is stretched in this part, the worker's fall prevention function is greatly impaired. (See Patent Document 1). A similar problem can also be pointed out in a measure of providing a normally open opening in a part of the danger prevention means (see Patent Document 2).

  When the risk prevention means requires a specific standardized counterpart, the applicability at a construction site other than the standard building is lacking (see Patent Document 3).

  If the risk prevention means is installed across a beam member that forms a floor opening where there is a risk of falling, it will hinder the construction of the floor surface supported by the beam member. When the danger prevention means is required, there arises a contradiction that it must be removed (see Patent Document 4).

  In addition, as for the conventional hazard prevention means in general, it is provided as a set that forms a fence of a structure that is planned by combining metal pipe materials as support members and crosspiece members, and a set of members constituting the set is provided on site or There is a transportation trouble that you have to carry it from the site. In addition, since there are many openings in the assembled state, even if a human fall accident can be prevented, the function of preventing the fall accident of the equipment is extremely poor. At work sites, there are not a few unexpected fall accidents in which an object entangled with the power tool cord falls.

The present invention is based on the premise that it can be installed on the site in a form that does not become an obstacle to construction, and enhances human fall prevention and fall prevention functions, and it is extremely easy for people or materials to be used without impairing these functions. It aims at providing the installation structure of the temporary protection fence which can form the path | route of this.

The installation structure of the temporary protection fence of the present invention is based on a base bracket that is fixed to a horizontal member at a construction site, a column bracket that is erected by combining with the base bracket, a horizontal beam member, and the horizontal beam member. A laterally long panel member, and on the side surface of the square-shaped column of the column bracket, a frame bracket for supporting and fixing the end of the horizontal beam member is arranged in the vertical direction at a predetermined interval. together are the and the ends of the panel member a groove rail for positioning accept a predetermined length is arranged in the vertical direction, when the erected said strut bracket at a predetermined interval, the horizontal crosspiece member said crosspiece The panel member can be fixed to a metal fitting, and the panel member is detachably attached to the groove rail .
According to the present invention, the column of the column metal fittings includes both a U-shaped column having a U shape in plan view and a square column having a hollow square shape in plan view. Features.
In the present invention, the strut of the strut metal fitting is a U-shaped strut that is U-shaped in a plan view in the straight portion, and the side surface of the U-shaped strut is side-surface A, side-surface B, side surface clockwise As shown in FIG. 3, the metal fittings for supporting and fixing the end portion of the horizontal crosspiece member are arranged on the side surface A and the side surface C at the same height position, and the end portion of the panel member The groove rails for receiving and positioning are arranged along the vertical direction of the side surface B, and
The struts of the struts are quadrangular struts having a hollow quadrilateral shape in plan view at the corner. When the side surfaces of the square struts are D, E, F, and G in the clockwise direction, In order to receive and position the end portion of the panel member, the crosspiece metal fittings for supporting and fixing the end portion of the crosspiece member are arranged on the side surface D and the side surface E at the same height position. The groove rails are arranged along the vertical direction of the side surface F and the side surface G, respectively.

  The base metal fitting in the column member of the temporary protection fence can be attached by a method of screw-fixing to an arbitrary position on the side surface of a horizontal member (a beam member in the case of wooden construction) at a construction site. The support bracket is erected on the base bracket fixed in such a manner. Therefore, the base metal fitting and the support metal fitting do not hinder, for example, a floor finishing work that is arranged to be placed on the beam member. Then, a plurality of lines are arranged at appropriate intervals according to the floor opening at the construction site, and are connected to each other through the cross rail member, and the linear protection in which the panel member is fitted between the groove rails. A fence can be formed. At this time, it is not always necessary to use both the horizontal beam member and the panel member between the adjacent column members, and depending on the danger situation of the construction site, only the portion where only the horizontal beam member is installed or only the panel member is used. The fitted part can be set arbitrarily. Moreover, all the support | pillar metal fittings used are in the standing state, Therefore, the attitude | position of the groove rail formed along a support | pillar metal fitting has faced the up-down direction. Therefore, the panel member fitted in the groove rail can be easily attached and removed by pulling upward. That is, a part of the assembled protective fence can be easily opened and closed as necessary by setting a place where only the panel member is used as a place where workers are expected to pass and materials are transported. In addition, as a crosspiece member and a panel member, it is sufficient to use the end material of the rafter and the structural plywood in the construction site.

In the present invention, the groove rails are formed so as to be paired in a back-to-back arrangement, and the end portions of the two panel members that are linearly connected to the U-shaped column side surface B of the column bracket are provided. Each of the base metal fittings is configured to receive the groove groove, and the base metal support post fixing plate is provided with a second groove rail corresponding to the first groove rail. The first groove rails and the second groove rails are arranged in a straight line when the pillar metal fittings are erected on the pillar fixing plate of the base metal fittings .
According to the present invention, by arranging a plurality of the support brackets at appropriate intervals according to the floor opening at the construction site, the panel members can be linearly connected in the same direction.

According to the present invention , a plurality of crosspiece members can be connected in the orthogonal direction, and the end portions of the two panel members can be positioned in the orthogonal direction. Therefore, for example, a hook-shaped, U-shaped, or rectangular frame-shaped protective fence can be assembled by arranging the support member of the present invention at the corner portion when it is desired to bend the protective fence at a right angle. Also in this case, by configuring the part used for the passage of workers by only the panel member, this part can be easily opened and closed.

According to the present invention, the base bracket includes an L-shaped bracket that is fixed to a side surface of the horizontal member, and a column fixing plate that is erected on the L-shaped bracket and is detachably combined with the column of the column bracket. and said that you are.

  The support member of the temporary protective fence can first take the assembly procedure of connecting the support bracket to the base bracket via the connection structure after fixing the base bracket to the side surface of the beam member of the floor opening, Assembling of the protective fence by one worker can be facilitated.

In the present invention, the coupling structure combining the base metal fitting and the support metal fitting is a pair of guide slits formed in the vertical direction from the side surface A to the side surface C of the support metal fitting at a predetermined interval in the horizontal direction. When a pair of latch claws that are out collision downward are formed at predetermined intervals in the vertical direction of the side face B of the strut of the strut bracket from the strut fixed plate of the base metal member is a one-to-one correspondence to said guide slit A guide plate protruding in the horizontal direction, a latch hole formed on the base side of the guide plate in a one- to -one correspondence with the latch pawl, and a width from the side surface A to the side surface C of the column of the column metal corresponding to the dimensions composed of a post fixed plate on both sides stop vibration of a pair of protruding downward from the plate of the base metal, the gas causes positioning struts of the strut bracket to vibration stop plates of the pair On which to match a de plate the position of the guide slit, and horizontal operation to match the position of the latch hole and the latching claw struts of the strut brackets along the guide plate is horizontally moved, said post fitting It is characterized in that it is detachably connected by a two-step operation by lowering and lowering the support pillar and dropping the latch claw into the latch hole.

  In the support member of the temporary protection fence, the base metal fitting and the support metal fitting are integrated by a two-step operation in which the operation directions of the horizontal operation and the vertical operation are different. As a result, even when an external force in the vertical direction is applied to the assembled protective fence, and even when an external force is applied in the horizontal direction, the base metal fitting and the post metal fitting are not separated. That is, safety that can be easily connected without using a tool or the like and is not easily separated without an artificial separation operation is realized.

As for the support | pillar member which concerns on this invention , it is preferable that the crosspiece metal fitting in a support | pillar metal fitting is attached to the support | pillar metal fittings detachably.

  The support member of the temporary protection fence can be removed in advance when a part of the protection fence is made only of a panel member without using a crosspiece member. When the panel member is pulled out from the wall and the pulled-out portion is used for the passage of the worker, it is possible to avoid the danger caused by the protruding bracket fitting.

According to the installation structure of the temporary protection fence of the present invention, a plurality of support members are attached to the support bracket by providing both the support bracket for connecting the horizontal rail member and the groove rail for connecting the panel member. Since the panel member is fitted in this part after being connected with the horizontal crosspiece member via the door, not only the function of preventing human fall, but also the function of preventing the fall of the instrument can be demonstrated reliably. A protective fence can be formed.

  The column member can be attached to the work site in a mode that is attached to the side surface of the beam member that forms the floor opening via the base metal fitting, that is, in a mode that protrudes to the floor opening side. It will not be an obstacle.

  Depending on the direction in which the groove rail and pier bracket are formed with respect to the column bracket, the column member is bent in the middle by connecting the horizontal beam member and the panel member in a straight line, as well as by connecting them in the orthogonal direction. It is also possible to form a protective fence. At this time, by omitting the crosspiece member required for transporting workers and materials and leaving only the panel member, this portion can be opened and closed by a simple operation of pulling out the panel member from the groove rail. Therefore, it is possible to achieve both high safety and convenience in the progress of various operations.

  Hereinafter, an embodiment of a support member of a temporary protective fence according to the present invention will be described with reference to the drawings. Note that there are two types of support members for the temporary protective fence, namely, a support member 50A for a straight portion and a support member 50B for a corner portion.

  The straight member 50 </ b> A for the straight portion includes the base metal member 20 and the post metal member 30. These are all welded and assembled members of sheet metal stamped parts (FIG. 1). Both can be easily connected or separated via a connecting structure JT composed of the receiving side connecting portion 20J of the base metal fitting 20 and the hanging side connecting portion 30J of the column metal fitting 30.

  The base metal fitting 20 includes an L-shaped bracket 21 having a corner reinforcing plate P3 attached on the back surface side, and a column fixing plate 22 erected on the upper surface of the horizontal portion P2 of the L-shaped bracket 21. A pair of triangular reinforcing plates P4 and P4 are arranged on both sides of the column fixing plate 22 to supplement the lack of weld area between the column fixing plate 22 and the L-shaped bracket 21. The upright portion P1 of the L-shaped bracket 21 is provided with a plurality of through holes H for insertion of screws B.

  A pair of left and right groove rails 23, 23 are arranged in the vertical direction on the front surface of the column fixing plate 22. The pair of groove rails 23, 23 are not formed individually, but are formed simultaneously by welding a single metal plate bent into a symmetric cross-sectional shape to the column fixing plate 22, and individually. It is a streamlined work. Therefore, the pair of groove rails 23, 23 may be provided individually. Moreover, each groove rail 23 is formed in the form which utilizes the support | pillar fixing board 22 as one side surface of a groove | channel, and the arrangement | positioning attitude | position of the left and right groove rails 23 and 23 is a back-and-back arrangement symmetrically.

  Parts constituting the receiving side connecting portion 20J of the connecting structure JT are attached to the back surface of the column fixing plate 22. The receiving side connecting portion 20J of the base metal fitting 20 includes a pair of upper and lower latch holes H2, H2, a pair of upper and lower guide plates 24, 24, and anti-vibration plates 25, 25 arranged at two upper and lower positions. It consists of.

  The pair of upper and lower guide plates 24 and 24 are attached at right angles to the support post fixing plate 22 in a horizontal posture, and the pair of upper and lower latch holes H2 and H2 are formed at the base of the guide plate 24, respectively. Further, the anti-vibration plates 25, 25..., Which are a pair of left and right, are attached at right angles to the column fixing plate 22 in an upright posture. Note that the pair of left and right anti-vibration plates 25, 25 in the present embodiment are located on the left and right of each guide plate 24 and are formed integrally with the guide plate 24. This is because the mounting strength of the two can be increased relative to the case where both are provided individually. Therefore, the guide plate 24 and the anti-rest plates 25 and 25 can be provided independently.

  The column metal 30 is a member that stands on the base metal 20 using the connection structure JT. The support bracket 30 includes a column 31 having a U-shaped cross section composed of two side surfaces 3S and 3S and a front surface 3F, groove rails 32 and 32 arranged in parallel along the support column 31 on the front surface 3F of the support column 31, and a support column. The left and right side surfaces 3S, 3S of the pair 31 are provided with two pairs of receiving metal fittings 33, 33. On the base side of the support column 31, a hanging side connection portion 30J constituting the connection structure JT is formed.

  The pair of groove rails 32, 32 in the support bracket 30 are formed in exactly the same manner as the groove rails 23, 23 of the base bracket 20. Therefore, the arrangement posture of the pair of groove rails 32, 32 is a symmetrical back-to-back arrangement.

  Each of the crosspieces 33 is obtained by fixing a side plate for screwing to one end obtained by cutting the angle material, and is detachably attached to the left and right side surfaces 3S, 3S of the column 31 by fixing screws 3B. The two pieces of each crosspiece 33 are formed with through holes H through which screws for fixing the end portions of the horizontal crosspiece members X are inserted. Each mounting bracket 33 is attached in such a way that it projects toward the side of the column bracket 30, and each pair of the mounting brackets 33, 33 has a symmetrical back-to-back arrangement.

  In addition, as long as each crosspiece 33 can be attached or detached, the arbitrary attachment methods replaced with the attachment method by the fixing screw 3B are employable. For example, it is possible to form slits that match the cross-sectional shape of the angle material on the two side surfaces 3S and 3S of the column 31 and attach the column 31 so as to penetrate the column 31 with the angle material. Further, a hook-shaped portion may be formed in a part of each of the crosspiece brackets 33 so as to be hooked on a slit formed in the column 31.

  The hook-side connecting portion 30J in the support bracket 30 is composed of a pair of upper and lower latch claws 3T, 3T and guide slits H3, H3. The guide slits H3 and H3 are formed by cutting out the two upper and lower portions of the column 31 corresponding to the guide plates 24 and 24 of the base metal fitting 20 in the horizontal direction from the front surface 3F side. In addition, each latch claw 3T partially narrows the slit width on the front surface 3F of the column 31 when each guide slit H3 is formed in the column 31. In other words, it is formed by working so that the tongue piece hangs down from above in the guide slit H3. At this time, the tongue piece that is relatively dropped is the latch claw 3T of the hanging side connecting portion 30J.

  The relationship between the receiving side connecting portion 20J of the base metal fitting 20 and the hanging side connecting portion 30J of the column metal fitting 30 is set as follows.

  The front-rear width of the latch hole H2 is a width that closely receives the thickness of the latch claw 3T. The left and right width of the latch hole H2 is a width that closely receives the width of the latch claw 3T. The vertical distance between the pair of upper and lower guide plates 24, 24 is equal to the vertical distance between the pair of upper and lower guide slits H3, H3. The minimum width portion of each guide slit H3 is a portion corresponding to the lower position of the latch claw 3T, and the guide plate 24 can pass through the minimum width portion without unnecessary play. The internal spacing between the pair of left and right anti-vibration plates 25, 25 is an interval for tightly receiving the width of the front surface 3F of the column 31.

  The base bracket 20 and the column bracket 30 position the column 31 between the left and right anti-vibration plates 25, 25 and place the latch claws 3 </ b> T on the respective guide plates 24 to determine the weight of the column bracket 30. 24, and in this state, the support bracket 30 is pushed horizontally to the support fixing plate 22 side, and when the front surface 3F of the support 31 comes into close contact with the support fixing plate 22, the latch claw 3T and the latch hole H2 Can be matched. When the two coincide, the latch claw 3T falls into the latch hole H2. As a result, the column 31 is restrained while being sandwiched between the left and right bracing plates 25 and 25 and in close contact with the column fixing plate 22. At this time, the groove rails 23 and 23 of the base metal fitting 20 and the groove rails 32 and 32 of the support metal fitting 30 are arranged in a straight line. The base metal fitting 20 and the post metal fitting 30 are connected (FIGS. 2 and 3).

  The support member 50A of the temporary protection fence having the above-described configuration is structured such that the base metal member 20 is screwed to the side surface of the beam member (horizontal member) M arranged around the floor opening or the like, and is connected to the fixed base metal member 20 The required number can be installed by the procedure of assembling the support bracket 30 through the JT. For this reason, installation by one worker is possible (FIGS. 1 to 3).

  The installed column member 50A is screwed at the end of the horizontal beam members X, X to two pairs of beam brackets 33, 33, which are arranged back to back, and the groove rail 32 of the adjacent column metal member 30, By inserting the panel members Y and Y into the panel 32 while sliding them from above, a straight temporary protective fence can be easily assembled (FIG. 4). At this time, since the support bracket 30 of each support member 50A is protruded and positioned on the floor opening side by the L-shaped bracket 21 of the base bracket 20, the temporary protection fence does not become an obstacle to floor work or the like. .

  The horizontal beam members X, X and panel members Y, Y can be prepared in advance, but those who use the rafters and panel edges that are no longer needed at the construction site However, it is convenient to form a temporary protective fence according to the situation at the site. Moreover, the temporary guard fence after use can be easily removed by a procedure reverse to the installation procedure.

  The supporting column member 50B for the corner portion in the temporary protective fence includes the crosspieces 33 and 33 and the groove rails 32 and 32 which are arranged orthogonally so that the horizontal crosspieces X and X and the panel members Y and Y in the orthogonal direction can be connected. Provide (FIG. 5). In the supporting column member 50B for the corner portion, a supporting column 31 having a box-shaped cross section is used. The pair of groove rails 32, 32 are individually formed on two orthogonal side surfaces 3S, 3S of the support column 31, and the crosspieces 33, 33 are arranged on the other two side surfaces. As a result, each of the pair of groove rails 32 and 32 and each of the pair of crosspieces 33 and 33 is orthogonally arranged in directions different by 90 degrees.

  In the support member 50B for the corner portion, the cross-sectional shape of the support column 31 is different from that of the support member 50A for the straight portion, but the connecting structure of the base bracket 20 and the support bracket 30 and the like JT is a support member for the straight portion. Same as 50A. However, the cross-sectional shape of the column 31 can be the same as the column member 50A for the straight portion. In this case, the orthogonal arrangement can be easily realized by attaching any one of the crosspieces 33 and 33 via a seat plate straddling the two side surfaces 3S and 3S of the column 31 having a U-shaped cross section.

  By using a combination of the support member 50A for the straight portion and the support member 50B for the corner portion, a temporary protective fence with high on-site compatibility can be assembled. Here, the usage example about the floor opening part HL of the staircase in a wooden house construction site is illustrated (FIG. 6).

  The floor opening HL of the staircase is usually arranged at one corner of the floor, and is usually put into practical use by closing two directions with a hook-shaped temporary protective fence. In this case, one strut member 50B for a corner portion and an arbitrary number of straight strut members 50A corresponding to the size of the floor opening HL are used. Adjacent strut members are connected to each other by the crosspiece member X, and the panel member Y is fitted between them to be completely closed. At this time, the interval between the adjacent support members need not be uniform, but rather is determined according to the crosspiece member X or the panel member Y that can be used on the spot. The base metal fitting 20 is fixed via the beam member M so as to protrude inside the corners of the floor opening HL, that is, on the floor opening HL side, not on the second floor side. Therefore, the base metal fitting 20 and the support metal fitting 30 arranged above the base metal fitting 20 are attached so as not to obstruct the floor surface finishing work arranged so as to be placed on the beam member M, for example.

  As for the floor opening HL of the staircase, a temporary ladder ST is installed for temporary protection because it must be used for the ascending / descending of workers and the lifting and unloading of materials until the design staircase is installed. The fence is provided with an entrance EN at the upper end position of the temporary ladder ST. The crosspiece member X between the column members 50A and 50B located on the left and right of the entrance / exit EN is omitted, and the crosspiece fitting 33 for attaching the crosspiece member X is removed. However, since the entrance / exit EN is completely blocked by the panel member Y, the fall prevention function of the worker and the fall function of the equipment are not deteriorated at all. The feature of the temporary protection fence using the column members 50A and 50B of the present invention It is.

  The opening / closing of the entrance / exit EN in the temporary protective fence is realized by a simple operation of pulling the panel member Y upward or dropping it into the groove rails 32, 32 of the left and right column members 50A, 50B.

  In any of the above-described embodiments, the base metal member 20 and the support metal member 30 may be integrated with each other without the connection structure JT interposed therebetween. The reason why the connecting structure JT is adopted is that it is only a convenient means for assembling the protective fence by one worker. Further, by making the support members 50A and 50B made of aluminum alloy and reducing the weight, it is possible to realize the ease of assembly by one worker without adopting the connecting structure JT. In addition, the groove rail 23 on the base metal fitting 20 side can be omitted. This is because the panel member Y can be sufficiently supported only by the groove rails 33 of the support post 30. In any of the above embodiments, the height position of the crosspiece member X can be selected by forming screw holes to which the fixing screws 3B are attached at a plurality of locations along the vertical direction of the column 31. It is possible.

  As described above, in the present embodiment, in the construction site of a building having two or more floors, the description is applied to the example of being arranged in the floor opening of the upper floor. It is also possible to attach it to prevent it from dropping. Moreover, it is also possible to attach and use only one of the horizontal beam member X and the panel member Y to the column members 50A and 50B of the temporary protective fence.

It is a disassembled perspective view which shows the support | pillar member of the temporary protection fence of one embodiment of this invention. It is a rear view of the assembly state of the one embodiment. It is a side view of the assembly state of the said one embodiment. It is a top view of the assembly state of the said one embodiment. It is a top view which shows the support | pillar member of the temporary protection fence of other embodiment of this invention. It is a plane arrangement | positioning figure which shows the usage example of the support | pillar member of the temporary protection fence of this invention.

Explanation of symbols

HL10 floor opening,
M Horizontal member (beam member),
X Crosspiece member,
Y panel member,
JT connection structure,
50A Straight member for the straight part (support member of temporary protective fence),
50B Supporting strut member for the corner part (supporting member of temporary protective fence),
20 Base bracket,
23 groove rail,
24 guide plate,
25 Damping plate,
30 Prop bracket,
32 groove rails,
33 Fittings,
3T latch claw,
H2 latch hole,
H3 Guide slit

Claims (6)

A base bracket that is fixed to a horizontal member at a construction site, a column bracket that is erected by combining with the base bracket, a horizontal beam member, and a panel member that is wider in width than the horizontal beam member , the column. the side surface of the strut fittings corner shape, with桟受only fitting for fixing to prop up the end portion of the lateral beam member are arranged at predetermined intervals in the vertical direction, the upper and lower ends of said panel member Groove rails for receiving and positioning in a predetermined length in the direction are arranged, and when the support bracket is erected at a predetermined interval, the horizontal beam member can be fixed to the beam bracket, and the panel member The temporary protective fence installation structure is characterized in that is configured to be detachably attached to the groove rail . The pillar of the metal fitting is characterized in that both a U-shaped pillar having a U shape in plan view and a square pillar having a hollow square shape in plan view are used. Item 1. Temporary protective fence installation structure. The strut of the strut bracket is a U-shaped strut that is U-shaped in a plan view in a straight portion, and when the side surface of the U-shaped strut is a side A, a side B, and a side C in a clockwise direction, Crosspieces for supporting and fixing the end portion of the horizontal crosspiece member are arranged at the same height position on the side surface A and the side surface C, respectively, and the end portion of the panel member is received and positioned. And the groove rail is arranged along the vertical direction of the side surface B, and
The struts of the struts are quadrangular struts having a hollow quadrilateral shape in plan view at the corner. When the side surfaces of the square struts are D, E, F, and G in the clockwise direction, In order to receive and position the end portion of the panel member, the crosspiece metal fittings for supporting and fixing the end portion of the crosspiece member are arranged on the side surface D and the side surface E at the same height position. 3. The temporary protective fence installation structure according to claim 1, wherein the groove rails are arranged along the vertical direction of the side surface F and the side surface G, respectively. The base bracket includes an L-shaped bracket that is fixed to a side surface of the horizontal member, and a column fixing plate that is erected on the L-shaped bracket and is detachably combined with the column of the column bracket. The installation structure of the temporary protection fence according to any one of claims 1 to 3 . The groove rails are formed so as to be paired in a back-to-back arrangement, and receive the end portions of the two panel members that are linearly connected to the U-shaped column side surface B of the column bracket. And the base metal fitting uses the groove rail as a first groove rail, and a second groove rail corresponding to the first groove rail is arranged on a support fixing plate of the base metal fitting, 4. The temporary protection according to claim 3, wherein the first groove rail and the second groove rail are arranged in a straight line when the support bracket is erected on a support fixing plate of the base bracket. Fence installation structure . The connecting structure combining the base metal fitting and the support metal fitting is a pair of guide slits formed in the horizontal direction at a predetermined interval in the vertical direction from the side surface A to the side surface C of the support metal , and the support material. a pair of latch claws that are out collision downward are formed at predetermined intervals in the vertical direction of the side face B of the fitting of the strut, oriented horizontally from the posts fixed plate of the base metal member is a one-to-one correspondence to said guide slit Corresponding to the width dimension from the side surface A to the side surface C of the column of the column metal fitting, the latch hole formed on the base side of the guide plate corresponding to the latch claw on a one- to -one basis. the consists from both sides of the strut fixed plate of the base bracket and a pair of vibration stop plate projecting downward, the guide plate and the front together to position the strut of the strut bracket to vibration stop plates of the pair Te On which to move the position of the guide slit, descending and horizontal operation to match the position of the latch hole and the latching pawl strut is horizontally moved in the strut fitting along the guide plate, the strut of the strut fittings 6. The temporary protective fence installation structure according to claim 3 , wherein the temporary protection fence is detachably connected by a two-step operation by an up-and-down operation of dropping the latch claw into the latch hole.

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