JP2017160726A - Construction method of temporary fall prevention fence and temporary fall prevention fence - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temporary fall prevention fence erectable-fixable in a proper position of an installed U-shaped water passage.SOLUTION: A column 3 is positioned on the tip part side of a horizontal member 2, and fixing means 4 is positioned on the base end part side, and the fixing means 4 is composed of a freely rotatable vertical lever and a freely expandable movable lever for providing a pressure contact plate on the tip of journaling on the left and right of a lower part of the vertical lever, and the pressure contact plate is press-contacted/fixed to left-right inner wall surfaces of a U-shaped water passage by expansively opening the movable lever by rotation of the vertical lever, and the horizontal member 2 and the column 3 are fixed by fixing an upper part of the vertical lever to the base end part side of the horizontal member, and a first skeleton is constructed by the horizontal member 2, the column 3 and the fixing means 4, and a second skeleton is constructed at a predetermined interval in the longitudinal direction of the U-shaped water passage by the horizontal member 2, the column 3 and the fixing means 1 similar to the first skeleton, and fall prevention means 5 is provided between the columns of the first and second skeletons.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a temporary fall prevention fence constructed in an outer region adjacent to an installed U-shaped waterway, a construction method for using the installed U-shaped water path as a support means for the temporary fall prevention fence, and a temporary fall. It is about prevention fence.

  Temporary fall prevention fences are constructed because there is a risk of falling when working in confined areas at high places such as road edges and slopes. Since it cannot be built up from the surface, it can be projected outward from the narrow flat area or the edge or inclined surface of the flat area by using a narrow flat area generated on the edge or slope. As a result, a temporary fall prevention fence is constructed. However, since this part is narrow in width, it holds ropes and nets that serve as fall prevention means, and excavation work, concrete placement work, Various operations such as installation work were extremely difficult and dangerous.

  In addition, when concrete pillars were fixed by placing concrete, many separate operations were required to destroy concrete, cut pillars, and transport them to remove the temporary fall prevention fence after use. .

  Therefore, it is conceivable to construct a temporary fall prevention fence using the existing structure as a support means for the pillars, etc., but existing support for supporting appropriate pillars on slopes such as road edges and slopes. It was difficult to obtain a construct.

  The following Patent Document 1 is formed as a thick portion projecting one side upper portion that is the outside in the length direction of the gutter block body, and provided with a vertical hole at every predetermined interval of the top end surface of the thick portion, A fall prevention fence can be formed even in a narrow area at the edge of a road or at a high place by inserting and fixing a column for the fall prevention fence. However, it is necessary for the fall prevention fence to have a vertical hole for inserting a column in the side groove block body in advance, and after inserting the column, the vertical hole is filled with mortar and solidified to solidify the column. Since it is a means to support, it is necessary to destroy the gutter block or to cut the column in order to remove the column, even if it is effective as a permanent fall prevention fence, it is not suitable for temporary use There wasn't.

Japanese Utility Model Publication No. 63-81988

  The present invention can fix the column upright by fixing the horizontal member of the temporary fall prevention fence at an appropriate position of the U-shaped water channel that has been installed without forming special means in advance in the U-shaped water channel, A frame of a temporary fall prevention fence can be formed by the support column, the horizontal member, and the fixing unit, and the fall prevention unit can be constructed by a rope or a net between the columns. The present invention is capable of constructing a temporary fall prevention fence with high strength and safety, and a construction method of a temporary fall prevention fence that can easily handle removal work, and a temporary fall constructed by the construction method. A prevention fence is provided.

  The present invention relates to a horizontal member and a column, and a method for constructing a temporary fall prevention fence as a framework by fixing the horizontal member to a U-shaped water channel that has been installed by a fixing means. The fixing means is located on the base end side, and the fixing means is a retractable vertical rod with a pressure contact plate provided at the distal end that is pivotally attached to the left and right of the lower portion of the vertical rod. The movable rod is formed by expanding the movable rod by the rotation of the vertical rod, so that the pressure contact plate is fixed to the left and right inner wall surfaces of the U-shaped water channel, and the upper portion of the vertical rod is fixed to the horizontal member. The horizontal member and the column are fixed by fixing to the base end side, and the first frame is constructed by the horizontal member, the column and the fixing means, and the horizontal member, the column and the same as the first frame are constructed. The second frame is constructed by fixing means with a predetermined interval in the longitudinal direction of the U-shaped water channel, First it features a method of building temporary for Railing formed by providing a fall prevention unit between the mounting posts of the second framework.

  Further, in a method of constructing a temporary fall prevention fence as a framework by fixing a horizontal member and a plurality of support columns and the horizontal member to a U-shaped water channel that has been installed by a fixing means, A fixing means is positioned on the support column and the base end side, and the fixing means is a telescopic vertical rod that is rotatable and a pressure contact plate provided at the tip that is pivotally attached to the left and right of the lower portion of the vertical rod. The movable rod is freely movable, the movable rod is expanded by rotating the vertical rod, and the pressure contact plate is pressed against the left and right inner wall surfaces of the U-shaped waterway, and the upper portion of the vertical rod is The horizontal member and the column are fixed by fixing to the base end side of the member, the first frame is constructed by the horizontal member, the column and the fixing means, the second frame similar to them, and the same A third frame, and so on, and a plurality of frames are constructed adjacent to each other with a predetermined interval in the longitudinal direction. Method for constructing a temporary for Railing formed by providing a fall prevention unit, characterized in between that strut.

  Further, the movable rod and the pressure plate are connected to a pin provided on the movable rod so as to be movable in an oblique long hole through hole formed on the side surface of the pressure plate. It features the construction method of the fence.

  In addition, a separate support column extending upward is provided at the upper end of the first frame post, and a separate support column extending upward is provided at the upper end of the adjacent second frame support. It is characterized by a method for constructing a temporary fall prevention fence in which the same third frame,... Is erected as necessary, and a fall prevention means is provided between each of the columns and separate columns.

  Further, the present invention is characterized by a construction method of a temporary fall prevention fence using the fall prevention means as a rope or / and a net.

  Further, in a temporary fall prevention fence composed of a horizontal member, a column and a fixing member formed by fixing the horizontal member to an installed U-shaped water channel and a fall prevention means, the tip side of the horizontal member The fixing means is formed on the base end side, and the fixing means includes a rotatable vertical rod and a movable rod provided with a pressure contact plate at a distal end that is extendable by rotation of the vertical rod. The pressure contact plate is fixed to the left and right inner wall surfaces of the installed U-shaped channel by pressure contact and fixed to form a first frame, which is composed of a horizontal member, a support column and a fixing means having the same configuration, By fixing the fixing means to the installed U-shaped waterway, the support column is fixed upright to form a second frame having a predetermined distance from the first frame, and it is prevented from falling between the first and second frame columns. It is characterized by a temporary fall prevention fence provided with means.

  Furthermore, in the fall prevention fence for temporary construction comprised by the frame which consists of a horizontal member, a support | pillar, and the fixing member which fixes this horizontal member to the U-shaped waterway which has been installed, and a fall prevention means, the front-end | tip part side of this horizontal member The fixing means is formed on the base end side, and the fixing means includes a rotatable vertical rod and a movable rod provided with a pressure contact plate at a distal end that is extendable by rotation of the vertical rod. The pressure contact plate is fixed to the left and right inner wall surfaces of the installed U-shaped channel by pressure contact and fixed to form a first frame, which is composed of a horizontal member, a support column and a fixing means having the same configuration, The fixing means is fixed to the U-shaped waterway that has been installed, and the column is erected and fixed to form a second frame having a predetermined distance from the first frame, and further, a similar third frame is formed. Features a temporary fall prevention fence provided with fall prevention means between the first, second, third frame,. To.

  Further, the movable rod and the pressure contact plate are connected to a pin provided on the movable rod so as to be movable in an oblique long hole formed in a side surface of the pressure contact plate so as to prevent the temporary drop. Features a fence.

  Further, a separate support column extending upward is provided at the upper end of the first frame support, and at the same time, a separate support support extending upward is provided at the upper end of the adjacent second structure support. Further, if necessary, a third separate structure is provided with a similar separate support post, and a temporary fall prevention fence provided with a fall prevention means between the adjacent separate support posts. To do.

  Further, the present invention is characterized by a temporary fall prevention fence in which the fall prevention means is a rope or / and a net.

  Further, the support column formed at the tip of the horizontal member is characterized by a temporary fall prevention fence formed by freely rotating a horizontal position and a vertical position on the horizontal member side.

  The present invention quickly constructs or constructs a temporary fall-preventing fence that can be obtained by detachably fixing a member to be a framework of a temporary fall-preventing fence to an installed U-shaped waterway or an installed U-shape. It became possible to quickly dismantle the temporary fall prevention fence without damaging the waterway.

  In addition, it has become possible to safely construct or temporarily dismantle a temporary fall prevention fence provided with a fall prevention means in a high place, an inclined place, a narrow place, a dangerous place, or the like.

The perspective view of the construction method of the temporary fall prevention fence of this invention, and the temporary fall prevention fence constructed | assembled by it. The side view which shows the relationship between the horizontal member of the temporary fall prevention fence of this invention, a support | pillar, and a fixing means. The side view which shows the closed state before insertion in a U-shaped waterway in the fixing means of the temporary fall prevention fence of this invention. (A) Top view of the press-contacting plate of the fixing means of the temporary fall prevention fence of this invention, (b) The front view, (c) The side view. The side view which shows the state expanded and fixed in the U-shaped waterway in the fixing means of the temporary fall prevention fence of this invention. The enlarged side view which shows the state which the movable rod of a fixing means is pressing the press-contacting plate to the inner wall surface side. The side view which shows the state which spanned the fall prevention means between the support | pillars of the temporary fall prevention fence of this invention. The side view which shows the state which provided the support | pillar of the separate body in the upper end part of the support | pillar of the temporary fall prevention fence of this invention, made it high and bridged the fall prevention means.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows the entire temporary fall prevention fence 1 of the present invention, and FIG. 2 shows the side surface thereof. The temporary fall prevention fence 1 includes a plurality of horizontal members 2, a plurality of vertical members 3 connected to the horizontal members 2, and fixing means 4 for fixing the horizontal members 2 to the ground side. And fall prevention means 5 spanned between the columns 3.

  The column 3 is pin-bonded at the position of the tip 6 on one side of the horizontal member 2 and is pin-bonded at that position, and is rotatable about 90 degrees from the horizontal direction to the vertical direction. . In order to maintain the upright state of the support column when it is vertical, a diagonal member 8 capable of obtaining a strength that serves as a fire hitting member is provided between the horizontal member 2 and the support column 3. The horizontal member 2 is provided with an elongated hole 9 with a locking portion in order to stop the rotation at approximately 90 degrees from the horizontal position to the vertical position and hold the state. The slant member 8 is pin-joined at the pin joint portion 10 so that one end of the diagonal member 8 is movable in the long hole 9 with the locking portion. When the column 3 is erected, the long hole 9 with the locking portion is locked. The diagonal member 8 is locked by moving the pin joint portion 10 to the one end side which is the portion side. The other end of the diagonal member 8 is pin-joined at the pin joint portion 11 of the column 3.

  With the above configuration, the horizontal member 2 and the column 3 can be rotated and overlapped, and at the same time, the diagonal member 8 also has the pin of the pin joint portion 10 moved to the other end side of the elongated hole 9 with the locking portion. By doing so, it becomes a substantially horizontal state, and it is possible to overlap the horizontal member 2 side in a bundle.

  The base end portion 12 on the other end side of the horizontal member 2 is provided with a through hole 13 in the vertical direction, and the through hole 13 has a bolt shape in which a screw groove is engraved around the fixing means 4. The front end 15 of the vertical rod 14 is penetrated and formed so that the front end 15 can be fixed on the upper surface of the horizontal member 2.

  FIG. 3 shows the fixing means 4. The fixing means 4 has a rhombus shape that moves in a vertical direction along a vertical rod 14 that is a rod-like body, a locking portion at the tip of the vertical rod 14, and a screw groove formed on the outer periphery of the vertical rod 14. The upper and lower right and left movable rods 16, 17, 18 and 19, which are formed of four members, and right and left pressure contact plates 20 and 21 formed on the left and right tip sides of the upper and lower right and left movable rods 16 to 19 are formed.

  One end portions of the upper right and left movable rods 16 and 17 are pivotally attached to a fitting shaft attaching portion 22 fitted in the thread groove of the vertical rod 14, and the right and left movable rods 16 and 17 are moved up and down by this portion. Is movable in the vertical direction, and one end portions of the lower right and left movable rods 18 and 19 are pin-joined by a pin joint portion 24 formed at the lower end portion 23 of the vertical rod 14.

  The other ends of the upper right and left movable rods 16 and 17 and the other ends of the lower right and left movable rods 18 and 19 are provided at positions overlapping each other. , 26 are pin-joined. The pin joints 25 and 26 move to the left and right as the fitting shaft attaching portion 22 moves downward, and the right and left pressure plates 20 and 21 maintain the vertical state and move to the right and left accordingly. It is formed so that it can move in the left direction.

  As shown in FIGS. 3 and 4A, 4B, and 4C, the right and left pressure contact plates 20 and 21 are substantially U-shaped in horizontal cross section, each including a web portion 27 and right and left flange portions 28 and 29, respectively. The web portion 27 of each of the right and left pressure plates 20 and 21 is formed outward, and an engaging portion 30 is provided at the end of the plate surface. Yes. Further, a rope fixing hole 31 is provided at the upper end of the right and left pressure contact plates 20 and 21.

  The tip 15 of the vertical rod 14 has a hexagonal head, and can be mounted with a tool as a turning means such as a monkey wrench, and the head can be rotated by the tool. The fitting shaft attaching portion 22 fitted in the screw groove formed around the vertical rod 14 can be moved in the vertical direction along the screw groove, and the upper and lower right and left movable rods 16 to 19 are moved. The right and left pressure plates 20 and 21 can be moved right and left, respectively.

  As shown in FIG. 2, the distal end portion 15 of the vertical rod 14 penetrates the through hole 13 formed on the base end portion 12 side of the horizontal member 2, and is firmly secured by a nut 32 on the upper surface side of the horizontal member 2. Can be fixed.

  When the vertical rod 14 is rotated in the clockwise direction in the fixed state, the fitting shaft attaching portion 22 fitted in the screw groove formed on the outer periphery of the vertical rod 14 is raised and rotated in the counterclockwise direction. The fitting shaft attachment portion 22 is lowered, and the right and left pressure contact plates 20 and 21 are moved in the right and left directions, respectively.

  When the fixing means 4 is inserted into the U-shaped water channel 33 already installed in the state shown in FIG. 3 with the lower end 23 side of the vertical rod 14 downward, and the vertical rod 14 is rotated counterclockwise, The fitting shaft attaching portion 22 moves downward along a thread groove formed on the outer periphery of the vertical rod 14 so that the upper right and left movable rods 16 and 17 are inclined with respect to the vertical rod 14. It moves to the position where the inclination angle is nearer to the horizontal than the inclined position where the large rising angle is, the pin joint portions 25 and 26 move to the right and left directions, and the lower right and left movable rods 18 and 19 are also the pin joints. As the portions 25 and 26 move to the right and left, they move to a position near a horizontal angle with a gentle inclination angle.

  As the upper and lower right and left movable rods 16 to 19 move, the right and left pressure contact plates 20 and 21 also move to the right and left, respectively, and as shown in FIG. The engaging portion 30 formed on the right and left pressure contact plates 20 and 21 is engaged with the right and left inner wall surfaces 34 and 35 by contacting the wall surfaces 34 and 35 and further rotating the vertical rod 14 counterclockwise. And firmly fixed.

  When an upward pulling force P in the axial direction is applied to the vertical rod 14 in a state where the vertical rod 14 is screwed and fixed to the horizontal member 2, the right and left pressure contact plates 20 and 21 In order to prevent the fixed state with the wall surfaces 34 and 35 from being released, the right and left pressure plates 20 and 21 in the pin joint portions 25 and 26 are elongated through holes 36 extending obliquely upward with respect to the longitudinal direction. , 37 are formed. As shown in FIG. 4 (c), the long hole through-hole 37 is obliquely upward in the direction of the vertical flange 14 with respect to the longitudinal direction of the right flange portion 28 of the left pressure contact plate 21 (the same applies to the left flange portion 29). It is formed as a long hole through-hole 37 extending in the vertical direction. In the present embodiment, an angle R with respect to the longitudinal direction of the left pressure contact plate 21 is set as a 45-degree obliquely upward long hole through hole 37. The right pressure contact plate 20 has the same angle R on the left pressure contact plate 21 side.

  As shown in FIG. 5, in a state where the right and left pressure contact plates 20 and 21 are fixed to the right and left inner wall surfaces 34 and 35, the pins 38 fixed at the pin joint portions 25 and 26 of the upper right and left movable rods 16 and 17, The distance between the left and right pressure plates 20 and 21 is pressed against the right and left inner wall surfaces 34 and 35, respectively.

  When an upward pulling force P acts on the vertical rod 14 of the fixing means 4 in this state, as shown in FIG. 6, the pin 39 of one left pin joint 26 (the pin 38 of the right pin joint 25 is the same). ) Acting on the pin 39 is a component force F1 that pulls the upper left movable rod 17 toward the vertical rod 14 side and a component force F2 that presses the left pressure plate 21 toward the left inner wall surface 35 side. It will be divided into the forces acting.

  The component force F2 acts in a direction in which the claw of the engaging portion 30 provided with the uneven claw formed on the left pressure contact plate 21 is more strongly bited into the left inner wall surface 35, and the left pressure contact plate 21 does not detach from the left inner wall surface 35. This action is the same for the right pressure contact plate 20. Therefore, even if a pulling force acts on the fixing means 4, there is no possibility that the fixing means 4 is detached from the installed U-shaped water channel 33.

  The angle R in the obliquely upward direction of the long hole through-holes 36 and 37 with respect to the longitudinal direction of the right and left pressure contact plates 20 and 21 is not limited to 45 degrees, and when the pulling force P acts on the fixing means 4, The angle R at which the component force in the direction in which the right and left pressure contact plates 20 and 21 are pressed against the right and left inner wall surfaces 34 and 35 is stronger than the component force pulled toward the vertical rod 14 can be selected as appropriate.

  The temporary fall prevention fence 1 is pin-joined at the distal end portion 6 of the horizontal member 2 by the base end portion 40 of the support column 3 and the pin joint portion 7 and is pivotally connected. Like the horizontal member 2, the member 8 can be brought into the construction site as a bundled member having a substantially rod shape. At the construction site, the horizontal member 2 is firmly fixed to the ground side by fixing the base end 12 side of the horizontal member 2 to the vertical rod 14 of the fixing means 4 inserted and fixed to the U-shaped water channel 33 that has been installed. Then, the support column 3 is turned upright from the horizontal state, and the vertical position is held and fixed by the diagonal member 8.

  The support column 3 has such a height that an effective height of at least 900 mm can be obtained so that the function as a handrail can be achieved, and hooks 41 project from a plurality of positions on the outer surface. The hook 41 is provided with a locking through means 42 that becomes a through hole or a notch through which the fall prevention means 5 such as a rope or a net can be passed, hooked or fixed.

  When the first frame includes the horizontal member 2, the column 3, and the fixing means 4 as main components, the second frame having the same configuration is separated by a predetermined distance along the installed U-shaped water channel 33. The horizontal member 2 is fixed by a separate fixing means 4 and the column 3 is erected. The fall prevention means 5 is provided between the pillars 3 of the first and second frames. The interval L between the columns 3 can be selected as appropriate, for example, about 10 m.

  The rope 43 can be passed through or locked into the through-hole or notch of the locking penetration means 42 of the hook 41 to provide the fall prevention means 5 between the columns 3. They can be performed safely from the U-shaped waterway 33 side. The rope 43 is bridged between the locking penetrating means 42 and the rope fixing hole 31 provided at the upper end of the right and left pressure contact plates 20, 21 to be the fixing means 4, whereby the side of the temporary fall prevention fence 1 is installed. The fall prevention means 5 and the support 3 can be used as a safety means for preventing the fall of the support 3. Further, the hook 41 can be used as a locking means for locking a lifeline for work outside the temporary fall prevention fence 1, and the upper and lower ropes 43 and the hooks that are stretched over the hook 41 can be used. By combining the locking to 41 or the like, it is possible to obtain a means for preventing fall from two directions.

  In the first embodiment, the rope 43 is bridged between the support columns 3. However, as shown in FIG. 7, the net body 44 can be safely bridged from the U-shaped water channel 33 side. The rope 43 and the net 44 can be used in combination, and it is possible to prevent a relatively small object or tool from falling in addition to means for locking the lifeline.

  The net 44 is fixed to the hook 41 on the upper side of the support column 3 by hooking the upper end thereof or by a rope or the like hooked on the hook 41, and the lower side is fixed to the lower hook 41 or wound down to the lower side of the horizontal member 2. By fixing, the entire space between the columns 3 can be covered.

  FIG. 8 shows a structure in which a support column 3 a extending continuously upward from the upper end portion of the support column 3 is provided. The support column 3a can be extended by fitting and extending from the upper end of the support column 3, by attaching or extending a rod-shaped member bent at the upper end.

  By providing a hook 41 on the outside of the column 3a and hooking or fixing a net body 45 on the hook 41, the temporary fall prevention fence 1 serving as the fall prevention means 5 having a height can be obtained. The net body 45 can be integrated with the net body 44 on the lower side from the tip of the support column 3a, or a separate body can be bridged over each.

  The temporary fall prevention fence 1 constructed in each of the above embodiments can quickly release the fixing means 4 from the U-shaped water channel 33 in which the fixing means 4 is installed and disassemble the entire structure. By rotating in the direction, it can be removed from the installation place in the state of being bundled into a bar shape that is easy to carry with the horizontal member 2.

DESCRIPTION OF SYMBOLS 1 Temporary fall prevention fence 2 Horizontal member 3 Support | pillar 4 Fixing means 5 Fall prevention means 6 Tip part 7, 10, 11, 18, 24, 25, 26 Pin joint part 8 Diagonal material 9 Long hole with a latching part 12 Horizontal member Base end portion 13 through-hole 14 vertical rod 15 vertical rod distal end portion 16 upper right movable rod 17 upper left movable rod 18 lower right movable rod 19 lower left movable rod 20 right pressure contact plate 21 left pressure contact plate 22 fitting shaft attachment portion 23 Lower end of vertical rod 27 Web portion 28 Right flange portion 29 Left flange portion 30 Engagement portion 31 Rope fixing hole 32 Nut 33 U-shaped water channel already installed 34 Right inner wall surface 35 Left inner wall surface 36, 37 Long hole through hole 38, 39 Pin 40 Base end portion of support 41 Hook 42 Locking penetrating means 43 Rope 44, 45 Net

Claims (11)

  In a method of constructing a temporary fall prevention fence as a framework by fixing a horizontal member and a column and the horizontal member to a U-shaped water channel that has been installed by a fixing means, a column and a base end on the distal end side of the horizontal member The fixing means is located on the side, and the fixing means includes a rotatable vertical rod and a telescopic movable rod provided with a pressure contact plate at the tip which is pivotally attached to the left and right of the lower portion of the vertical rod. The pressure plate is fixed to the left and right inner walls of the U-shaped channel by expanding the movable rod by rotating the vertical rod, and the upper portion of the vertical rod is the base end of the horizontal member. The horizontal member and the column are fixed by fixing to the side, the first frame is constructed by the horizontal member, the column and the fixing unit, and the first frame is constructed by the horizontal member, the column and the fixing unit similar to the first frame. Two frames are constructed with a predetermined interval in the longitudinal direction of the U-shaped water channel, Method for constructing a temporary for Railing that characterized by comprising providing a fall prevention unit between the mounting posts of the framework.   In a method of constructing a temporary fall prevention fence as a framework by fixing a horizontal member and a plurality of support columns, the horizontal member to a U-shaped water channel that has been installed by a fixing means, a support column on the distal end side of the horizontal member, The fixing means is located on the base end side, and the fixing means is a retractable vertical rod and a retractable plate provided with pressure contact plates at the distal ends of the vertical rods attached to the left and right. The movable rod is expanded, and the movable rod is expanded by rotating the vertical rod to press and fix the pressure contact plate to the left and right inner wall surfaces of the U-shaped waterway. The upper portion of the vertical rod is fixed to the horizontal member. The horizontal member and the column are fixed by fixing to the base end side, the first frame is constructed by the horizontal member, the column and the fixing means, the second frame similar to them, and the similar first frame Three frames are constructed, and a plurality of frames are constructed with predetermined intervals in the longitudinal direction, and adjacent frames are supported. Method for constructing a temporary for Railing characterized by comprising providing a fall prevention unit between.   The movable rod and the pressure contact plate are connected so that a pin provided on the movable rod is movable in an oblique long hole through hole formed on a side surface of the pressure contact plate. The construction method of the temporary fall prevention fence for 1 or 2 description.   Standing up a separate strut that extends upward at the upper end of the first frame strut, and at the same time standing up a separate strut extending upward at the top end of the adjacent second framework strut, A temporary installation as claimed in any one of claims 1 to 3, characterized in that a similar third frame is erected as necessary, and a fall prevention means is provided between each of the columns and separate columns. How to construct a fall prevention fence.   The method for constructing a temporary fall prevention fence according to any one of claims 1 to 4, wherein the fall prevention means is a rope or / and a net.   In a temporary fall-preventing fence composed of a horizontal member, a column, and a fixed member formed by fixing the horizontal member to an installed U-shaped water channel and a fall-preventing means, the tip of the horizontal member The fixing means is formed on a support column and a base end side, and the fixing means includes a rotatable vertical rod, and a movable rod provided with a pressure contact plate at a distal end which can be expanded and contracted by rotation of the vertical rod. The column is erected and fixed to the left and right inner wall surfaces of the U-shaped water channel that has been installed by the pressure plate, and the first frame is formed by a horizontal member, a column, and a fixing unit having the same configuration. Is fixed to the U-shaped waterway that has been installed, and the column is erected and fixed to form a second frame having a predetermined distance from the first frame, and a fall prevention means is provided between the columns of the first and second frames. Temporary fall prevention fence characterized by being provided.   In a temporary fall-preventing fence composed of a horizontal member, a column, and a fixed member formed by fixing the horizontal member to an installed U-shaped water channel and a fall-preventing means, the tip of the horizontal member The fixing means is formed on a support column and a base end side, and the fixing means includes a rotatable vertical rod, and a movable rod provided with a pressure contact plate at a distal end which can be expanded and contracted by rotation of the vertical rod. The column is erected and fixed to the left and right inner wall surfaces of the U-shaped water channel that has been installed by the pressure plate, and the first frame is formed by a horizontal member, a column, and a fixing unit having the same configuration. Is fixed to the U-shaped water channel that has been installed, and the column is erected and fixed to form a second frame having a predetermined distance from the first frame, and further, a similar third frame is formed. Temporary fall prevention, characterized in that a fall prevention means is provided between the columns of the first, second, third frame,. Fence.   The movable rod and the pressure contact plate are connected so that a pin provided on the movable rod is movable in an oblique long hole through hole formed on a side surface of the pressure contact plate. 6. A temporary fall prevention fence according to 6 or 7.   Standing up a separate strut that extends upward at the upper end of the first frame strut, and at the same time standing up a separate strut extending upward at the top end of the adjacent second framework strut, Further, if necessary, a similar separate strut is erected on the third frame,..., And fall prevention means is provided between the adjacent separate struts. One of the temporary fall prevention fences described in any one of the above.   The temporary fall prevention fence according to any one of claims 6 to 9, wherein the fall prevention means is a rope or / and a net.   11. The temporary fall prevention according to any one of claims 6 to 10, wherein the support column formed at the tip of the horizontal member is formed so as to be rotatable between a horizontal position and a vertical position on the horizontal member side. fence.

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