JP5313203B2 - Safety net fastener and horizontal frame for construction - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a safety net hooking tool capable of hooking and stretching a safety net for working at a high place at an arbitrary place, and a horizontal frame for building having the safety net hooking tool. is there.

  Conventionally, workers who work at high altitudes are prevented from crashing into the ground etc. when they fall off their feet, or when they accidentally drop objects from high altitudes, they can hit the workers below and be injured. Safety nets are frequently used to prevent this.

  The applicant has developed a metal fitting for tensioning the safety net, and has filed a number of patent applications including Japanese Patent No. 4187732 (Patent Document 1).

  Briefly explaining this Patent Document 1, the metal fitting body is formed in a substantially U-shape, and bolts are screwed and fixed to one end of the free both ends of the metal fitting body, and the bolt tip is moved by rotating the bolt. Provided so that it can move toward and away from the other end of each free end, and a fixed part that can be clamped and fixed to an object to be mounted such as a pillar or beam of a building with the tip of this bolt and the free other end In the configuration provided with a hanging part for hanging the peripheral part of the safety net on the back side of the metal fitting body on the opposite side of the fixed part, for example, for a building in the middle of construction where a safety net is to be stretched The safety net extending metal fitting is fixed to a plurality of H-shaped steels surrounding a given space by fixing the metal fitting to the H-shaped steel flange part, which is a framework, through the fixing part. By hanging the peripheral part of the safety net on each hanging part, It is those that can be stretched a safety net in the space of meaning.

  More specifically, the hanging portion will be described. A substantially L-shaped metal bar is attached to the back surface of the metal fitting body at two locations on the back and top, and each of the upper and lower metal bars is provided. The tip of the metal rod attached to the upper end is inclined downward, the tip of the metal rod attached to the lower is inclined upward, and this The tip side of each metal rod body is provided so as to be in a substantially parallel state with a gap between them, and the gap between the tip side parts is used as a net insertion gap. It is possible to hang and hang the tension rope part etc. around the net, and when hanging, the tension rope part around the net is almost perpendicular to the interval part of the metal rod, It has a structure that does not come off.

Japanese Patent No. 4187732

  In recent years, unforeseen strong winds have been blowing frequently due to global extreme weather.

  The present invention ensures that the safety net can be easily attached and removed, while the safety net is very easy to drop off when a very strong blowing force due to unexpected strong winds is applied to the safety net. It is a technical problem to provide a highly reliable safety net latch that can be well prevented and a horizontal frame for building equipped with this safety net latch.

  The gist of the present invention will be described with reference to the accompanying drawings.

It is a safety net hook A that is secured to a mounting location 2 of a horizontal frame member 1 of a building and capable of hanging a safety net 3 and can be fixed to the mounting location 2 of the horizontal frame material 1 A fixing part 4, a hook 6 provided on one side of the fixing part 4 and capable of hooking the safety net 3 on the net extending space 5, and the opposite side of the hook 6. The safety net 3 is provided on the other side of the fixing portion 4 and is attached to a locking rod 6 to prevent the safety net 3 from moving and moving away from the fixing portion 4 in the other direction. The latch bar 6 includes a rising bar part 7 standing upward from one side of the fixed part 4 and a horizontal bar part projecting sideways from the rising bar part 7 toward the removal preventing bar 9. a structure consisting of 8 Prefecture, the dropping off preventing rod 9, wherein provided from the other side of the fixed portion 4 upstanding upward, the intermediate portion of one of杆材12 A fixed portion 4 is formed, and one side flange portion of the fixed portion 4 is bent to form the latch rod 6 including the rising flange portion 7 and the horizontal flange portion 8. The one side collar portion is bent and formed in a shape parallel to the fixing portion 4, and the other side collar portion of the fixing portion 4 is bent to form the removal preventing rod 9 . The projecting front end side of the horizontal flange portion 8 and the removal prevention rod 9 are provided in an intersecting state in a side view, and the safety net 3 is disposed between the horizontal flange portion 8 and the intersection portion 10 of the removal prevention rod 9. The present invention relates to a safety net latching tool characterized in that a net insertion gap 11 is formed which is removably inserted and can be latched at the projecting tip of the horizontal flange 8.

The front Symbol dropping off preventing rod 9, so as to tilt toward the rising rod portion 7 side of the Kaketome杆6 provided upright position, the rising lever portion 7 of the Kaketome杆6 pulled out By providing the prevention rod 9 in an upright state at a different angle with respect to the fixing portion 4 in a direction orthogonal to the opposing direction of the latch rod 6 and the removal prevention rod 9, the latch rod 6 The side end 8 of the horizontal flange 8 is provided in a crossing state with the protruding hook 9 in a side view, and between the horizontal hook 8 of the hook 6 and the crossing 10 of the locking bar 9. 2. The safety net latch according to claim 1, wherein the net insertion gap is formed.

Further, the horizontal flange portion 8 of the latching rod 6 is formed in a shape in which the projecting tip portion protrudes outward from the intersecting portion 10 with the removal prevention rod 9, 3. The safety net latch according to claim 1 , wherein the upper end portion is formed in a shape projecting upward from an intersection 10 with the recumbent portion 8. is there.

In addition, the present invention relates to a horizontal frame for construction characterized by fixing the safety net hook A according to any one of claims 1 to 3 .

  Since the present invention is configured as described above, it is possible to easily hook / unhook the safety net from the net insertion gap as in the case of the conventional product, but a situation where unexpected strong wind blows out. Even if the safety net is strongly blown upward, it is an epoch-making safety net hook that is excellent in practicality and can prevent the safety net from dropping off from the hook.

That is, according to the present invention, when the safety net is blown up by a strong wind or the like, the latching portion moves upward. Therefore, it is prevented from moving upward from the lateral flange portion by abutting against the lateral flange portion protruding in the lateral direction. Although it can move laterally along the buttocks, even if the hooking part of the safety net tries to move in the direction of the anti-removal saddle along the lateral saddle, the direction of movement tends to extend the safety net outward. Therefore, it is difficult for the latching part to move in the direction of the removal prevention hook due to the return force of the safety net, and even if this hooking part moves laterally in the direction of the removal prevention hook, Abut against the removal prevention rod that intersects the protruding tip side of the Therefore, since the movement from the pull-out prevention hook to the side of the projecting tip of the horizontal hook is prevented, the safety net hooking portion is inserted from the net insertion gap between the horizontal hook and the pull-out prevention hook. This is a highly reliable safety net hook that does not come off.

Further, in the present invention, it is possible to very easily design and implement a safety net latch that exerts the above-described effects by simply bending a single saddle member.

In the invention of claim 2, wherein the structure simple to enables design realized with a net insertion gap between the intersections of the projecting distal end side and the pull-out prevention lever of the horizontal portion, moreover, safe for all nets Even when the latching part moves laterally along the lateral flange and comes into contact with the anti-detachment collar, the latching area is fixed to the lower part along the anti-detachment collar that tilts toward the rising collar. The safety net is extremely practical so that it is reliably prevented from being guided to the net insertion gap and the latched state is maintained well. It becomes a latch.

Further, in the invention described in claim 3, a situation in which a very strong force acts on the safety net and the portion adjacent to the latching portion is pulled with a strong force to the outside of the recumbent portion or the removal prevention rod. Even in this case, the part adjacent to the hook part is a more reliable safety net hook that prevents the upper part of the anti-detachment collar and the protruding tip of the lateral collar from coming off. .

Moreover, in invention of Claim 4 , it becomes the horizontal frame material for construction excellent in the practicality which exhibits the said effect | action and effect.

It is a perspective view which shows a present Example. It is a schematic explanatory drawing which shows the use condition (the horizontal frame material for construction to which the safety net hook was fixed) of the safety net hook of a present Example. It is a partial expansion explanation front view which shows the use condition of a present Example. It is a partial expansion explanatory side view which shows the use condition of a present Example.

  An embodiment of the present invention which is considered to be suitable will be briefly described with reference to the drawings showing the operation of the present invention.

  Using the safety net hook A of the present invention, for example, a worker falls or an object falls in a space part (net space part 5) surrounded by a horizontal frame member 1 of a building. The safety net 3 for preventing this can be stretched.

  Specifically, the safety net latch A according to the present invention is fixed to the horizontal frame 1 by, for example, welding the fixing portion 4 to the horizontal attachment location 2 of the horizontal frame 1. At this time, the hook 6 is fixed so as to be positioned on the net extending space 5 side. In addition, you may make it construct | assemble a building using the horizontal frame material 1 for construction which fixes the safety net latch A beforehand.

  For example, the safety net 3 is hooked on the plurality of safety net hooks A fixed to the horizontal frame 1 surrounding the net extending space 5 via the hooks 6. By hooking the stop portion 13, the safety net 3 can be hooked and stretched in the net stretch space 5.

  Further, the safety net 3 is latched from the net insertion gap 11 by inserting a latching portion 13 such as a stretched rope portion 13 at the peripheral edge of the safety net 3 and from the protruding tip of the lateral flange 8. This is easily done by hooking on the hook 6.

  The hook 13 of the safety net 3 that is hooked is pulled toward the center of the space 5 for the net extension of the hook 6 by the weight of the safety net 3 and is hooked to the rising hook 7. However, when the safety net 3 is blown up by a strong wind, for example, the hooking portion 13 moves upward along the rising collar 7, and from the rising collar 7 to the removal preventing collar 9. The contact with the horizontal flange 8 projecting sideways toward the upper side is prevented from moving upward from the horizontal flange 8.

  In addition, the latching portion 13 of the safety net 3 that is in contact with the recumbent portion 8 can move in the lateral direction (the length direction of the recumbent portion 8) along the recumbent portion 8, but the rising reed When moved in the direction of the portion 7, the hooked state is maintained by abutting against the rising collar portion 7. On the contrary, when the latching portion 13 moves in the direction of the removal prevention rod 9, it comes into contact with the removal prevention rod 9 that intersects with the projecting tip side of the horizontal flange 8, thereby removing the removal prevention rod 9. Since movement to the projecting front end side of the horizontal flange portion 8 is prevented, the hooking portion of the safety net 3 from the net insertion gap 11 between the horizontal flange portion 8 and the intersection 10 of the removal prevention rod 9 is prevented. 13 will not come off.

  Therefore, even if the safety net 3 is strongly blown upward in a situation where an unexpected strong wind blows, the safety net 3 is reliably prevented from coming off.

  When the safety net 3 is removed from the hooking rod 6, the hooking portion 13 and its adjacent portion are easily operated through the net insertion gap 11 by operating the hooking portion 13 and its adjacent portion so as to be substantially parallel to the hooking portion 8. 8 can be removed from the protruding tip.

  Further, for example, the horizontal flange portion 8 of the latching rod 6 is provided in parallel with the fixed portion 4, and the removal preventing rod 9 is inclined toward the rising collar portion 7 side of the latching rod 6. In this way, the rising hook 7 and the pull-out prevention hook 9 of the hook 6 are arranged in the opposite direction of the hook 6 and the pull-out prevention hook 9 with respect to the fixed part 4. And providing the protruding tip side of the lateral flange portion 8 of the latching rod 6 and the removal preventing rod 9 in a crossed state in a side view, If the gap 11 for net insertion is formed between the crossing part 10 of the horizontal hook 8 and the anti-separation bar 9 of the hooking bar 6, the rising bar part 7 of the hooking bar 6 and the anti-detachment bar 9 The net is surely inserted between the projecting tip side of the horizontal flange 8 and the intersecting portion 10 of the removal prevention rod 9 with a simple configuration in which the standing angle with respect to the fixed portion 4 is different. Structures having use gap 11 can realize.

  In addition, the fact that the hook 13 of the safety net 3 moves in the direction of the anti-detachment rod 9 along the horizontal flange 8 will cause the safety net 3 itself to extend outward. Due to the return force of the safety net 3 against the elongation, it becomes difficult for the hooking portion 13 of the safety net 3 to extend outward, so that the hooking portion 13 of the safety net 3 moves toward the net insertion gap 11. Difficult to move.

  Further, even when the latching portion 13 of the safety net 3 moves laterally along the lateral flange portion 8 and comes into contact with the removal prevention rod 9, it is inclined to the rising collar portion 7 side of the latching rod 6. Since the latching portion 13 is guided to move toward the lower fixing portion 4 along the pull-out prevention rod 9 that is erected, the latching portion 13 is guided to the net insertion gap 11. Is surely prevented.

  Further, for example, the horizontal flange portion 8 of the latching rod 6 is formed in a shape in which the projecting tip portion protrudes outward from the intersection 10 with the removal prevention rod 9, and the removal prevention rod 9. If the upper end portion is formed so as to protrude upward from the crossing portion 10 with the recumbent portion 8, a very strong force acts on the safety net 3 so as to contact the recumbent portion 8. Even if the adjacent portion of the portion 13 is pulled outward with a strong force, since the upper end portion of the removal prevention rod 9 protrudes outward from the lateral flange portion 8, the removal prevention rod 9 It is very difficult to cross the upper end portion of the hook over the adjacent portion of the hooking portion 13.

  Therefore, it is difficult for the latching site 13 to drop off because the adjacent site of the latching site 13 exceeds the upper end of the removal prevention rod 9.

  Further, even if the adjacent portion of the latching portion 13 that is in contact with the removal prevention rod 9 is pulled outwardly with a strong force, the protruding tip portion of the horizontal flange portion 8 is prevented from being removed. Since it protrudes outward from the flange 9, it is very difficult for the adjacent portion of the latching portion 13 to cross the protruding tip of the lateral flange portion 8.

  Accordingly, the hooking site 13 is less likely to drop off due to the adjacent portion of the hooking site 13 exceeding the protruding tip of the lateral flange 8.

  Therefore, even if a portion adjacent to the hooking portion 13 of the safety net 3 is pulled with a very strong force, it is prevented from coming off from the projecting tip portion of the horizontal flange portion 8 or the upper end portion of the removal prevention rod 9. Therefore, the latching state of the latching portion 13 of the safety net 3 is more reliably maintained.

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

  In the present embodiment, the horizontal frame 1 is fixed to the horizontal mounting location 2 of the horizontal frame member 1 of the building. The present invention relates to a safety net hooking tool A for hanging a safety net 3 for preventing a fall or a fall of an object. The horizontal frame member 1 in the drawing adopts an H-section steel 1 and the upper surface of the flange portion 2 (the lower flange portion 2 in the drawing) of the H-section steel 1 is adopted as a horizontal attachment location 2. Is shown.

  Specifically, a fixing portion 4 that can be fixed to the attachment location 2 of the horizontal frame 1 and a safety net 3 that is provided on one side of the fixing portion 4 and is hooked on a net extending space portion 5. The latching part 6 of the safety net 3 that is provided on the other side of the fixing part 4 that is opposite to the latching part 6 and that is provided on the other side of the fixing part 6 is secured to the fixing part 4. It is composed of a removal prevention rod 9 that prevents the movement and removal in the other direction.

  Further, the latching rod 6 of the present embodiment includes a straight rod-shaped rising rod portion 7 standing vertically upward from one side of the fixed portion 4, and the removal preventing rod from the upper end portion of the rising rod portion 7. An L-shaped ridge formed of a horizontal heel portion 8 having a straight ridge shape projecting in a horizontal direction parallel to the fixed portion 4 (projecting in a direction perpendicular to the erected direction of the rising ridge portion 7). It is composed.

  In addition, the pull-out prevention rod 9 of the present embodiment is configured by a straight rod standing upward from the other side of the fixing portion 4 and is slightly inclined toward the rising flange portion 7 side of the hooking rod 6. The upper portion of the pull-out preventing rod 9 is provided in a standing state, and the upper portion of the retaining rod 9 is viewed from the side (see the fixing portion 4 from the direction perpendicular to the length direction from one side to the other side). It is provided so as to intersect with the projecting leading end side of the horizontal flange 8.

  Further, in this embodiment, the horizontal flange portion 8 of the retaining rod 6 is formed in a shape in which the projecting tip portion protrudes outward from the intersecting portion 10 with the removal prevention rod 9, and the removal The prevention hook 9 is formed in such a shape that its upper end protrudes upward from the intersection 10 with the horizontal flange 8.

  More specifically, in the present embodiment, the metal saddle member 12 having a round cross section is formed by bending. That is, the intermediate collar part of the collar member 12 is the fixed part 4, and one side collar part of the fixed part 4 is bent into a roll L shape so that the one side collar part becomes the rising collar part 7 and the horizontal collar. And the other side collar part is formed by bending the other side collar part of the fixing part 4 so as to be slightly inclined toward the rising collar part 7 side. The pull-out prevention rod 9 is configured.

  In the present embodiment, a hooking portion 13 of the safety net 3 is removably inserted between the crossing portion 10 of the horizontal flange portion 8 and the removal prevention rod 9 from the projecting tip of the horizontal flange portion 8. A net insertion gap 11 that can be hooked is formed.

  Specifically, the rising hook portion 7 of the hooking rod 6 and the pull-out preventing rod 9 are arranged in a direction orthogonal to the opposing direction of the hooking rod 6 and the pull-out preventing rod 9 with respect to the fixed portion 4. Are provided in an upright state at different angles, so that the projecting leading end side of the horizontal flange portion 8 of this latching rod 6 and the removal preventing rod 9 are provided in a crossed state in a side view, and this latching rod The net insertion gap 11 is formed between the crossing portion 10 of the horizontal flange portion 8 and the anti-detachment rod 9 of 6.

  More specifically, the direction in which the rising collar 7 and the removal preventing collar 9 are fixed with respect to the fixed portion 4 is determined in the direction around the axis of the fixed portion 4 around the axis of the fixed portion 4 (the outer peripheral surface of the fixed portion 4). (Circumferential direction) with an angle of about 35 ° to 40 ° (preferably 37 °) being erected, it is about 9 to 13 mm between the horizontal flange 8 of the intersection 10 and the removal prevention rod 9 ( The gap is preferably 11 mm), and this gap is used as the net insertion gap 11. For example, the latching part 13 of the safety net 3 is made substantially parallel to the lateral flange 8 so that the latching part 13 can be inserted / removed from the net insertion gap 11.

  Next, the usage method of the safety net latch A of a present Example is demonstrated.

  For example, the present embodiment is implemented by welding and fixing the fixing portion 4 to the horizontal upper surface of each flange portion 2 of the plurality of H-section steels 1 disposed so as to surround the space (net extending space portion 5). A plurality of the safety net hooks A in the example are fixed at intervals in the length direction of the H-section steel 1 and are fixed so that the hooks 6 are positioned on the net extending space 5 side. . At this time, in this embodiment, the removal prevention rod 9 is set up in a state of being substantially perpendicular to the upper surface of the flange portion 2 (the rising flange portion 7 is inclined with respect to the upper surface of the flange portion 2). The case where the fixing portion 4 is fixed to the flange portion 2 is shown. In addition, the fixing means of the fixing | fixed part 4 is not limited to welding, It can change suitably.

  Then, a stretched rope portion 13 (hanging portion 13) at the periphery of the safety net 3 is inserted into the net insertion gap 11 of each safety net latching tool A, and the stretched rope portion 13 is The safety net 3 can be hooked and stretched in the net tensioning space 5 by being hooked on the hook 6 from the projecting tip. In addition, although the case where the tension | pulling rope part 13 of the safety net 3 was used as the latching site | part 13 to the latching rod 6 was shown in drawing, the latching method of the safety net 3 is not restricted to this.

  Then, the hooking portion 13 of the hooked safety net 3 is pulled toward the center of the net extending space 5 of the hooking rod 6 by the weight of the safety net 3 and hooked to the rising hook portion 7. However, when the safety net 3 is blown up by, for example, a strong wind, the latching portion 13 moves upward along the rising collar 7 and the above-described anti-detachment collar 7 By abutting against the horizontal flange 8 projecting sideways toward 9, it is prevented from moving upward from the horizontal flange 8. Even when the latching portion 13 moves upward without moving along the rising collar portion 7, it is prevented from moving upward from the lateral flange portion 8 by abutting on the lateral flange portion 8 in the same manner.

  In addition, the latching portion 13 of the safety net 3 that is in contact with the recumbent portion 8 can move in the lateral direction (the length direction of the recumbent portion 8) along the recumbent portion 8, but the rising reed When moved in the direction of the portion 7, the hooked state is maintained by abutting against the rising collar portion 7.

  On the contrary, when the latching portion 13 moves in the direction of the removal prevention rod 9, it comes into contact with the removal prevention rod 9 that intersects with the projecting tip side of the horizontal flange 8, thereby removing the removal prevention rod 9. Since movement to the projecting front end side of the horizontal flange portion 8 is prevented, the hooking portion of the safety net 3 from the net insertion gap 11 between the horizontal flange portion 8 and the intersection 10 of the removal prevention rod 9 is prevented. 13 will not come off. Further, in this case, when the hooking portion 13 of the safety net 3 is moved in the direction of the removal prevention rod 9 along the lateral flange portion 8, the safety net 3 itself tends to be extended outward. Therefore, there is also a return force of the safety net 3 that resists this elongation, and it becomes difficult for the hook 13 of the safety net 3 to extend outward, so that the safety net 3 is hooked in the direction of the net insertion gap 11. Site 13 is difficult to move. Further, even when the latching portion 13 of the safety net 3 moves laterally along the lateral flange portion 8 and comes into contact with the removal prevention rod 9, it is inclined to the rising collar portion 7 side of the latching rod 6. Since the latching portion 13 is guided to move toward the lower fixing portion 4 along the pull-out prevention rod 9 that is erected, the latching portion 13 is guided to the net insertion gap 11. Is surely prevented.

  Therefore, even if the safety net 3 is strongly blown upward in a situation where an unexpected strong wind blows, the safety net 3 is reliably prevented from coming off.

  Further, when the hooking portion that is hooked on the rising hook portion 7 moves in the direction of the anti-detachment rod 9 (lateral direction) along the fixed portion 4, it comes into contact with the removal prevention rod 9. This prevents the lateral movement from the removal prevention rod 9.

  Further, when the safety net 3 is blown up in a state where the latching portion 13 of the safety net 3 is in contact with the removal prevention rod 9, the latching portion 13 moves upward along the removal prevention rod 9. At this time, the removal prevention rod 9 is inclined toward the rising collar portion 7 side, so that it is guided to move along the inclined removal prevention rod 9 toward the rising collar portion 7 side of the horizontal collar portion 8. It is difficult to be guided to the net insertion gap 11, so that the latching portion 13 of the safety net 3 is difficult to come off.

  In addition, even if a very strong force is applied to the safety net 3 and the adjacent portion of the latching portion 13 that is in contact with the lying portion 8 is pulled to the outside of the lying portion 8 with a strong force, the removal is prevented. Since the upper end portion of the flange 9 protrudes outward from the lateral flange portion 8, it is very difficult to cross the upper end portion of the pull-out preventing rod 9 beyond the adjacent portion of the latching portion 13.

  Further, even if the adjacent portion of the latching portion 13 that is in contact with the removal prevention rod 9 is pulled outwardly with a strong force, the protruding tip portion of the horizontal flange portion 8 is prevented from being removed. Since it protrudes outward from the flange 9, it is very difficult for the adjacent portion of the latching portion 13 to cross the protruding tip of the lateral flange portion 8.

  Therefore, there is a problem that the hooking portion 13 falls off from the net insertion gap 11 when the adjacent portion of the hooking portion 13 exceeds the upper end portion of the removal preventing rod 9 or the projecting tip portion of the lateral flange portion 8. Hard to occur.

  When the safety net 3 is removed from the hooking rod 6, the hooking portion 13 and its adjacent portion are easily operated through the net insertion gap 11 by operating the hooking portion 13 and its adjacent portion so as to be substantially parallel to the hooking portion 8. 8 can be removed from the protruding tip.

  In this embodiment, the safety net latch A fixed to the horizontal frame 1 is shown. However, the safety net latch A of the present embodiment is previously fixed to the horizontal frame 1 at a factory or the like. You may comprise the horizontal frame material for construction (refer FIG. 2) with the safety net latching tool A which consists.

  Further, the present invention is not limited to the present embodiment, and the specific configuration of each component can be designed as appropriate.

DESCRIPTION OF SYMBOLS 1 Horizontal frame material 2 Attaching location 3 Safety net 4 Fixing part 5 Net installation space part 6 Hanging hook 7 Standing collar part 8 Horizontal collar part 9 Removal prevention collar
10 Intersection
11 Net insertion gap
12 杆 材 A Safety net hook

Claims (4)

It is a safety net hook that is fixed to a mounting position of a horizontal frame member of a building, and is capable of hanging a safety net, and a fixing part that can be fixed to the mounting position of the horizontal frame member, A hook that is provided on one side of the fixed part and can be used to hook the safety net to the space for extending the net, and a hook that is provided on the other side of the fixed part that is opposite to the hook. An anti-detachment rod that prevents the safety net hooked on the rod from moving and pulling away from the other side of the fixed portion, and the hook rod is raised upward from one side of the fixed portion. A rising collar portion to be provided, and a lateral flange portion projecting laterally from the rising collar portion toward the removal prevention rod, wherein the removal prevention rod is upward from the other side of the fixing portion. provided upstanding, intermediate portion of the single杆材to the fixed portion, the standing one side rod portions of the fixed portion bent to The latch rod having the raised collar portion and the lateral collar portion is configured, and the one lateral collar portion is bent and formed in a shape in which the lateral collar portion is parallel to the fixed portion. A side hook portion is bent to form the pull-out prevention hook, and the protruding tip side of the horizontal hook portion of the latching hook and the pull-out prevention hook are provided in a crossed state in a side view. A safety net characterized in that a net insertion gap that can be hooked at the projecting tip of the horizontal flange is formed by inserting the safety net in a releasable manner between the crossing portion of the hook and the removal prevention rod. Hook. Before SL dropping off preventing rod is provided upright position so as to be inclined toward the rising rod portion side of the latching lever, and a rising rod portion of the engaging rod and the pull-out prevention lever, the fixed By installing it in an upright position at a different angle in the direction perpendicular to the opposing direction of the latching rod and the removal prevention rod, it is possible to remove it from the projecting tip side of the horizontal flange portion of the latching rod. 2. The prevention rod is provided in a crossed state in a side view, and the net insertion gap is formed between the horizontal flange portion of the latching rod and the intersection portion of the removal prevention rod. Safety net hook. The side hook portion of the latching rod is formed in a shape in which the projecting tip portion protrudes outward from the intersection with the pull-out prevention rod, and the upper end portion of the pull-out prevention rod is the side hook. The safety net latching device according to any one of claims 1 and 2 , wherein the safety net latching device is formed in a shape protruding upward from an intersection with the portion. A horizontal frame for building construction comprising the safety net latch according to any one of claims 1 to 3 fixed.

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