JP4187732B2 - Safety net extension bracket - Google Patents

Description

  The present invention relates to a safety net tension fitting for tensioning a safety net in a high place of a building, for example.

  Conventionally, when a worker who works at a high place falls off a foot and crashes into the ground, or when an object is accidentally dropped from a high place, he or she hits a worker below and is injured. Safety nets are often used to prevent this.

  Moreover, the applicant has secured the safety net tension metal fitting of the patent 2964076 (patent document 1) used in order to stretch this safety net.

  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 a configuration in which a locking portion for locking the periphery of the safety net is provided on the back surface of the metal fitting body on the opposite side of the fixing portion, for example, a safety net is desired to be stretched as shown in FIG. This metal fitting is clamped and fixed to the flange of H steel, which is the framework of the building in the middle of construction, via the fixing part, and this safety is fixed to multiple H steels surrounding an arbitrary space. Lock the perimeter of the safety net to each locking part of the net extension fitting It can be stretched a safety net in any of the space between the framework.

Japanese Patent No. 2964076

  The safety net tension metal fitting of this patent document 1 may be fixed to a frame material of a building in advance, and then the frame material with the metal fitting may be assembled, or it may be retrofitted to the frame material after assembly. Although it is good, in particular, this safety net extension bracket fixing work to horizontal materials such as beams is also applied to horizontal materials installed horizontally on the ground. Since the operator also performs the rotation tightening operation of the bolt of the fixed portion from the upper side of the horizontal member, the fixed portion is attached to the horizontal member so that the bolt is arranged on the upper side. When it is fixed, the bolt located on the upper side can be easily rotated and tightened by hand.

  However, if the bolt is fixed with the bolts arranged on the upper side, a floor or the like is formed above the horizontal member when the safety net is no longer needed. When trying to remove (and the safety net), floor materials, etc. get in the way, and it is necessary to insert a tool into the narrow gap between the floor materials and this metal fitting. Removal work was very difficult.

  On the other hand, this safety net extension fitting can also be arranged with bolts on the bottom side to fix the fixing part to the horizontal member, so that the floor material etc. can be disturbed from below the horizontal member. The bolts can be loosened by extending the tool or the like without doing so, and the removal work of the metal fittings can be easily performed. However, in the case of fixing in this way, conversely, since the bolt tightening operation is required to reach the lower side of the metal fitting at the time of fixing, this fixing operation becomes troublesome.

  The present invention finds the problem of such a conventional safety net tension metal fitting and further improves it to solve the problem, and tightens it in a state of being opposed to both free ends of the substantially U-shaped metal fitting body. Even when fixing the horizontal member as an object to be mounted with bolts, it is possible to easily perform the fixing work by operating the fastening bolts arranged on the upper side during fixing, and even upward when releasing the fixing. Even if a floor or the like is formed, it provides an epoch-making safety net tension fitting that can be easily unlocked by operating the fastening bolts arranged on the lower side. is there.

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

In a safety net tension metal fitting provided with a locking portion 2 for locking the safety net A to the metal fitting body 1 fixed to the fixing portion 3A of the mounting object 3 for tensioning the safety net A, the metal fitting body 1 is substantially omitted. The first tightening bolt 4 is screwed to one side end 1A of the free both ends of the metal fitting body 1 and the first tightening bolt 4 is rotated by screwing. 4A is provided so as to be in contact with and away from the other end 1B of the free both ends of the metal fitting body 1, and the second fastening bolt 5 is screwed to the other end 1B of the free both ends of the metal fitting 1. The second tightening bolt 5 is provided so that the bolt front end portion 5A comes into contact with and separates from the one end portion 1A of the free both ends of the metal fitting body 1 by rotational screwing. are the dimensions, the fitting body and the bolt 5 with the second clamping shorter than the length of the first fastening bolt 4 When screwed to the other end 1B to the tightening screw Irigen the free end portions, the length dimension bolt tip 5A is slightly protruded to the one end 1A direction from the other side end portion 1B The first tightening bolt 4 is rotated and screwed to bring the bolt front end 4A of the first tightening bolt 4 closer to the bolt front end 5A of the second tightening bolt 5. The mounting object 3 is configured to be clamped and fixed by the tightening bolt 4 and the second tightening bolt 5, and the second tightening bolt 5 is loosened from the clamped and tightened state to perform the clamping and tightening. The present invention relates to a safety net extending metal fitting characterized in that it can be released from the fixed state.

  Since the present invention is configured as described above, the first fastening bolt is arranged on the upper side, and the second fastening bolt is mounted particularly when the metal fitting is fixed to the horizontal member for construction as an attachment object. By fixing the fixing part on the lower side, the fixing work can be easily performed by rotating and tightening the first tightening bolt arranged on the upper side at the time of fixing. Since the second tightening bolt placed on the lower side can be released from the bottom of the bracket, it can be released, so even if a floor or the like is created above the horizontal building material, it does not interfere with the flooring. The second fastening bolt can be easily loosened and the bracket can be removed, and the length of the second fastening bolt is set shorter than the length of the first fastening bolt. Similar to the prior art document 1 only by adjusting the rotational screwing of the first tightening bolt that is longer than the tightening bolt. Even if it is fixed to a fixed part that is so thick that the second fastening bolt must be loosened, it can be clamped and clamped in good correspondence with the different thicknesses of the fixed part of the mounting object. In addition, the amount of operation for loosening and rotating the short second tightening bolt is small, and it is extremely practical for the prior art document 1 to exhibit good workability without significantly impairing workability. Excellent groundbreaking safety net extension fittings.

In the present invention, when the length of the second tightening bolt is screwed to the other end of the free both ends of the metal fitting body to the tightening screw limit, Since the bolt tip is set to a length that slightly protrudes from the other end toward the one end, a sufficiently wide fixing point is provided between the bolt tips by turning the first tightening bolt. Therefore, the fixing work can be performed only by operating the first tightening bolt, and the excellent fixing workability equivalent to that of Patent Document 1 can be surely exhibited, and the workability is extremely excellent. It is.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention that are considered suitable (how to carry out the invention) will be briefly described with reference to the drawings, illustrating the operation of the present invention.

  For example, the frame material of the building in the middle of construction is set as the attachment object 3, and the fixing point 3 </ b> A of the attachment object 3 is connected to the bolt front end 4 </ b> A of the first fastening bolt 4 between the free ends of the metal fitting body 1. Arranged between the two bolt end portions 5A of the two tightening bolts 5 and moving the first tightening bolt 4 to move closer to the bolt end portion 5A of the second tightening bolt 5 by rotating the first tightening bolt 4. Then, the fixing part 3A is clamped and fixed between the bolt front end 4A of the first tightening bolt 4 and the bolt front end 5A of the second tightening bolt 5, thereby fixing the metal fitting 3 It can be attached and fixed to.

  The safety net A can be stretched in an arbitrary space portion of the building by locking the safety net A to the locking portions 2 of the multiple metal fittings attached and fixed in this manner.

  In particular, when the metal fitting is attached and fixed to a horizontal member for construction such as a beam as the attachment object 3, the clamping bolt for clamping and fastening is U-shaped as in Patent Document 1 described above. If it has only one of the free ends of the bracket body, it can be fixed easily by fixing the bracket with the tightening bolt on the upper side of the mounting object. If a floor or the like has been formed above the horizontal member when trying to remove it, it will be a very difficult task to loosen the tightening bolt located on the upper side. When using (fixing) the tightening bolt on the lower side, it will be easier to loosen the bolt when removing the bracket after completion, but it will be required to tighten the bolt by reaching down when fixing it. , There is a problem that this fixing work becomes troublesome

  However, according to the present invention, at the time of fixing, the first tightening bolt 4 arranged on the upper side can be rotated by fixing the first tightening bolt 4 on the upper side of the object 3 to be fixed. This fixing work can be easily performed by dynamic tightening operation, and even if a floor or the like is completed on the main bracket (mounting object 3) when the main bracket is removed, the lower side with respect to the mounting object 3 Since the fixed state can be loosened without disturbing the floor or the like by rotating the second tightening bolt 5 arranged on this, this detaching operation can also be easily performed.

  At this time, in the present invention, the first tightening bolt 4 and the second tightening bolt 5 are provided with two bolts. It can also be performed by operating only the attached bolt 4. Moreover, since the first tightening bolt 4 is longer than the second tightening bolt 6, the rotational screwing range can be widened and it is good for the fixed portion 3A having various thicknesses. Can be clamped and clamped corresponding to

  In addition, for example, when both the first tightening bolt 4 and the second tightening bolt 5 are configured to be long, when fixing to the fixing portion 3A of the very thick attachment object 3, If the first and second tightening bolts 4 and 5 are not loosened, there may be a case where it is not possible to secure a sufficient gap for inserting the fixing portion 3A between the bolt tip portions 4A and 5A. However, in the present invention, the second fastening bolt 5 is set shorter than the first fastening bolt 5 so that only the first fastening bolt 4 is operated. In this case, the space between the bolt tip portions 4A and 5A can be secured widely, and even when the second fastening bolt 5 is fixed to the fixing portion 3A of the attachment object 3 that is thick enough to be loosened. Loosen the second tightening bolt 5 without this length Since requires a small amount the dynamic operation amount, without much impairing workability with respect to prior patent Document 1, it will exhibit good workability.

  In addition, for example, if the second fastening bolt 5 is screwed to the other end 1B of the free both ends of the metal fitting 1 in advance before the fixing operation, the screwing limit is reached. Since the second tightening bolt 5 is prevented from rotating unexpectedly during the tightening operation of the first tightening bolt 4, the fixing work can be easily performed.

  Further, for example, when the second tightening bolt 5 is screwed to the tightening screwing limit, the length of the bolt front end 5A slightly protrudes from the other end 1B toward the one end 1A. If set, a sufficiently wide insertion gap of the fixed portion 3A can be secured between the bolt front end portions 4A and 5A by the rotation operation of only the first tightening bolt 4, so that the first tightening bolt 4 The fixing work can be performed only by the operation, and the good fixing workability equivalent to that of Patent Document 1 can be surely exhibited, and the workability is extremely excellent.

  A first embodiment of the present invention will be described with reference to FIGS.

  In the present embodiment, as shown in FIG. 1, a locking portion 2 for locking the safety net A is provided on the metal fitting body 1 that can be fixed to the fixing portion 3 </ b> A of the attachment object 3 that stretches the safety net A. Yes.

  Specifically, the metal fitting body 1 is formed in a substantially U-shaped shape, and the engagement between the intermediate portion of the metal fitting body 1 and the back surface portion 1C located on the opposite side with respect to the protruding direction of the free ends. It is set as the structure which protruded the part 2. FIG.

  In addition, the locking portion 2 is provided with a substantially L-shaped metal rod body 2A at two locations above and below the back surface portion 1C of the metal fitting body 1, and the respective tip portions of the metal rod body 2A are shown in FIG. As shown in FIG. 2, the tip of the metal rod 2A attached on the upper side is inclined downward, and the tip of the metal rod 2A attached on the lower side is inclined upward, By providing the front end side portions of the respective metal rods 2A to be inclined so as to be in a substantially parallel state, the tension rope 6 around the safety net A can be hooked and locked from the interval portion between the both end side portions. It is configured.

  Moreover, the fixing structure to the attachment object 3 of the metal fitting body 1 of the present embodiment is such that the first screw hole 10 and the second screw hole 11 that penetrate the free end portions in the juxtaposition direction of the free end portions, respectively. And the first screw bolt 10 and the second screw bolt 5 are screwed into the first screw hole 10 and the second screw hole 11 so that the respective bolt tip portions 4A and 5A face each other. The first bolt 4 and the second bolt 5 are rotationally screwed so that the respective bolt tips 4A and 5A are moved toward and away from each other in the opposite direction, and the bolt tips 4A and 5A. Thus, it is configured such that it can be clamped and fixed to the fixing portion 3A of the attachment object 3.

  That is, the metal fitting body 1 is fitted on the fixing portion 3A of the attachment object 3 (with the fixation portions 3A of the attachment object 3 disposed between the free ends of the metal fitting body 1), for example, the first tightening When the bolt 4 is rotated and screwed so that the bolt front end portions 4A and 5A approach the bolt front end portion 5A direction of the second fastening bolt 5, the first fastening bolt 4 and the second fastening bolt 5 are provided. The fixing portion 3A is clamped and fixed between the bolt tip portions 4A and 5A.

  In this embodiment, the length of the second fastening bolt 5 is set shorter than that of the first fastening bolt 4.

  Specifically, the first tightening bolt 4 is set to a longer length so that the holding width can be widely adjusted by a rotational screwing operation according to the thickness of the fixed portion 3A, and the second tightening bolt 4 5, when the second tightening bolt 5 is screwed to the other end 1B of the free both ends of the metal fitting body 1 to the tightening screwing limit, the bolt front end 5A becomes the other end 1B. It is set to a short length dimension that slightly protrudes in the direction of the one side end portion 1A and has a length that can loosen the clamping and fastening state.

  More specifically, the first tightening bolt 4 has a length equivalent to that of the tightening bolt of the prior patent document 1, and the second tightening bolt 5 is about 1/3 of the first tightening bolt 4. It is set as the structure which has the length of.

  Next, a method of using the present embodiment configured as described above will be described. In this embodiment, H steel, which is a beam material (horizontal member) of a building, is used as an attachment object 3, and the flange portion of this H steel is used as a fixed portion 3A, and this flange portion 3A is used as a first fastening bolt 4 And the second tightening bolt 5 are clamped and fixed.

  In this case, in this embodiment, as shown in FIGS. 2 and 3, the flange portion 3A is fixed with the long first tightening bolt 4 on the upper side and the short second tightening bolt 5 on the lower side. To do. Further, basically, at the time of mounting and fixing, the second tightening bolt 5 is tightened to the other end 1B to the tightening screwing limit. Then, if necessary, the upper first tightening bolt 4 is rotated to adjust the distance between the bolt front end portions 4A and 5A, and the fixing portion 3A is disposed between the bolt front end portions 4A and 5A. The first tightening bolt 4 is tightened and fixed to the flange portion 3 </ b> A, and the tension rope 6 around the safety net A is locked to the locking portion 2.

  When the safety net A is no longer needed, a floor or the like is created above the H steel 3 (beam material). Therefore, when the metal fitting is fixed to the beam material as in this embodiment, the floor material or the like However, it is difficult to loosen the upper first tightening bolt 4 due to obstruction, but the second tightening bolt 5 can be easily loosened from below the floor using a tool 7 such as a socket wrench. The metal fitting and the safety net A can be easily removed (see FIG. 3).

  A second embodiment of the present invention will be described with reference to FIG.

  This embodiment is a case where the shape of the U-shaped metal fitting main body 1 and the configuration of the locking portion 2 are different from those of the first embodiment.

  Specifically, the metal fitting body 1 of the present embodiment has a shape having a lateral width as compared with the metal fitting body 1 of the first embodiment, and the one end portion 1A is gradually thinned toward the tip side. This is the case.

  In addition, the locking portion 2 of the present embodiment is formed by bending a single metal rod 2B in an annular shape, and is in a substantially parallel state in which both ends of the rod 2B do not contact each other and are spaced apart from each other. In this way, the tension rope 6 around the safety net A can be hooked and locked from the gap between the both ends, and the intermediate portion of the rod 2B constituting the locking portion 2 is connected to the metal fitting body. This is a case where it is configured to be attached to the back surface portion 1C.

  The present invention is not limited to the first and second embodiments, and the specific configuration of each component can be designed as appropriate.

1 is a perspective view showing Example 1. FIG. FIG. 3 is an explanatory diagram illustrating a usage state of the first embodiment. It is explanatory drawing at the time of the fixed release operation of Example 1. FIG. FIG. 6 is a perspective view showing Example 2.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Metal fitting body 1A One side edge part 1B Other side edge part 2 Locking part 3 Attachment object 3A Fixing place 4 1st clamping bolt 4A Bolt tip part 5 Second clamping bolt 5A Bolt tip part A Safety net

Claims (1)

In the safety net tension metal fitting provided with a locking part for locking the safety net to the metal fitting body fixed to the fixing location of the mounting object to stretch the safety net, the metal fitting body is formed in a substantially U-shape, The first tightening bolt is screwed to one end of the free both ends of the metal fitting body, and the first tightening bolt is rotated and screwed so that the bolt front end is the other end of the free both ends of the metal fitting body. The second fastening bolt is screwed to the other end of the free ends of the metal fitting body, and the tip end of the bolt is rotated by rotating the second fastening bolt. Provided so as to be in contact with and away from one end of the free both ends of the metal fitting body, the length of the second fastening bolt is shorter than the length of the first fastening bolt, and the second fastening When the bolt is screwed to the other end of the free ends of the bracket body to the tightening screw limit, End is set to a length dimension which projects slightly from the other side end portion to the one end direction, the bolt tip of the first fastening bolt first the first tightening bolt rotates threadedly The clamping object can be clamped and fixed with the first clamping bolt and the second clamping bolt by approaching the tip of the two clamping bolts. A safety net tension metal fitting configured to be able to be released from being clamped and tightened by loosening the second tightening bolt.

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