JP2005232682A - Tensile tool for netted body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tensile tool for a netted body useful for avoiding curling when pulling out a rolled geogrid to be used. <P>SOLUTION: The tensile tool for the netted body comprises a hook bar having a hook protrusion, a pressure bar, a connection member having a rack gear mechanism for connecting the hook bar to the pressure bar in a forward and backward movable manner, a spur gear for meshing with the rack gear mechanism, a ratchet gear mechanism for rotating the rotating shaft of the spur gear, and a support for supporting the connection member, the rotating shaft of the spur gear and the ratchet gear mechanism. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a net-like tension jig. More particularly, the present invention relates to a tension jig useful for eliminating curling when a rolled-up geogrid is used.

  When building roads, embankments, land development, etc., geogrids are buried to reinforce the embankments. In general, a net-like body obtained by stretching uniaxially or biaxially a perforated sheet of polyethylene or polypropylene containing carbon black is frequently used because of its excellent strength and durability. Such a plastic mesh is used in a rolled form because of its manufacturing method and ease of handling. However, at the construction site, when these rigid plastic mesh bodies are pulled out from the roll and cut into a predetermined size, the curl remains, so it takes a little labor to lay it horizontally. It was the current situation.

  Therefore, an object of the present invention is to provide a tension jig that can easily eliminate such curl of a geogrid at a construction site.

  A net-like tension jig according to the present invention includes a hook bar having a hook protrusion, a presser bar, a connecting member having a rack gear mechanism for connecting the hook bar and the presser bar so as to be able to advance and retreat, and a rack gear mechanism. And a ratchet gear mechanism that rotates the rotation shaft of the spur gear, and a support member that supports the connecting member, the rotation shaft of the gear, and the ratchet gear mechanism.

  The hook bar and the presser bar are preferably detachable from the connecting member from the viewpoint of handling. Further, the ratchet gear mechanism is formed by the ratchet gear that rotates the rotating shaft and the ratchet spanner engaging portion provided at the end of the rotating shaft, so that the rotating shaft can be manually rotated by the ratchet spanner. The rack gear can be easily actuated by the spur gear coaxially attached thereto, and therefore, the mesh body can be easily tensioned by reducing the distance between the hook bar and the presser bar. Thereby, the curl of the net-like body can be eliminated.

  According to the present invention, it is possible to provide a net-like tension jig that is easy to carry and handle and can easily eliminate the curl of a geogrid at a construction site.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a net-like tension jig according to the present invention will be described with reference to the drawings.

  FIG. 1 is a drawing in which a tension jig 2 of the present invention is placed on a geogrid 1 and is in use. A geogrid cut to a predetermined length from the roll is laid from the lower left of the drawing to the upper right at the embankment construction site, etc. The tip of the geogrid in the lower left is used for embankment construction It is connected and fixed to the bottom surface portion of the L-shaped lattice form (not shown). The geogrid has a tendency to roll back from the upper right side by a winding rod, and this is solved by tensioning the upper right side by the tension jig of the present invention. 2 is a plan view of the tension jig of the present invention, FIG. 3 is a front view thereof, and FIG. 4 is a left side view thereof.

  The pulling jig 2 of the present invention has a hook bar 3 having a hook protrusion 31 and a press bar 4 having a presser protrusion 41 which is paired with the hook bar 3, and a rack gear 5 and a rack gear case for accommodating the rack gear 5 so as to be able to advance and retract. 6 are connected by a connecting member 7, and the distance between the bars can be adjusted by the operation of the rack gear. Each of the hook bar 3 and the presser bar 4 is a long material having an L-shaped cross section, and the bottom part plays a role of pressing down a net-like body such as a geogrid and further biting into and fixing the installation surface. is there. Both are provided with female fitting members 32 and 42 for connecting to the connecting member 7 at the center thereof, and the male fitting members 71 and 72 provided at both ends of the connecting member 7 are the female fittings. By fitting the joint members 32 and 42, the above connection can be achieved. A plurality of hooking protrusions 31 are fixed to the rear wall surface of the hooking bar 3 and are provided at predetermined intervals so as to protrude below the wall surface, and by hooking on the mesh of the geogrid, Tension the geogrid in the lower left with the tension jig. The interval varies depending on the mesh interval of the geogrid, but it is preferable that the interval is about one per mesh 2-10. The presser bar 4 has the same structure as that of the hook bar 3, and when the tensioning jig is operated, the tensioning jig and the geogrid are fixed by the operator stepping on the bottom surface of the pressing bar 4. Can do. The hook bar 3 and the presser bar 5 are respectively provided with two handles 33 and 43 protruding on the wall surfaces so that the hook bar 3 and the presser bar 5 can be easily carried.

  At the front end portion of the rack gear case 6 in the vicinity of the central portion of the connecting member 7, a bearing bracket 8 of a grooved member having two wall surface portions on both side surfaces is provided so that the rack gear case 6 is placed in the groove portion. ing. The wall surface of the bearing bracket 8 has a through hole for penetrating and holding the rotating shaft 9 of the spur gear 10. The spur gear 10 is attached to the rotary shaft 9 so as to mesh with the rack gear 5 in the vicinity of the opening provided in the upper portion of the rack gear case 6 between the two wall surface portions of the bearing bracket 8. As a result, the rack gear operates to adjust the distance between the hook bar and the presser bar.

  On the outside of the wall surface of the bearing bracket 8 are a ratchet gear 11 provided coaxially with a spur gear having a shaft 9 as a rotation axis, and a rotation handle 12 provided rotatably on the bearing bracket 8 with a pin. A locking claw 13 that rotates and engages with the groove of the ratchet gear 11 is provided, and the reverse rotation of the ratchet gear 11 is prevented by bringing the locking claw 13 into contact with the groove of the ratchet gear 11. The spur gear 10 is rotated in one direction, and the spur gear 10 is rotated in one direction and the rack gear 5 is advanced. Thus, the distance between the hook bar and the presser bar can be reduced. If the hooking protrusion 31 of the hooking bar 3 is hooked on the mesh of the geogrid 1, tension is applied to the geogrid portion in front of the hooking bar 3 by the above operation, so that the curl is eliminated. The ratchet gear 11 is operated by providing a ratchet spanner engaging portion 13 provided at the tip of the shaft 9 so as to protrude from the ratchet gear portion. ) Can be engaged and rotated.

  After completion of the tension work of the mesh body, the handle 12 is rotated in the reverse direction to release the engagement between the locking claw 13 and the ratchet gear 11, and then the rack gear is moved backward by reversely rotating the ratchet gear. The distance between the bar and the presser bar can be restored. Such operations are sequentially repeated by changing the work place, so that the net-like curling can be sequentially eliminated.

  The procedure for eliminating the curl of one net using the tension jig of the present invention has been described above, but the present invention is applied to the end mesh of two nets laid close to each other at a distance. By applying the tension jig, it is possible to eliminate the curl similarly. That is, the holding protrusion 41 of the tension jig 2 is inserted into the end mesh of one mesh body, the end of the holding jig 4 is fixed by the presser bar 4, and the pulling jig 2 is pulled into the end mesh of the other mesh body. By entangling the hanging projection 31 and holding the end thereof with the hooking bar 3 and operating the rack gear 5 in the same manner to reduce the distance between the two, the other net-like body can be tensioned and the curl can be eliminated.

It is drawing which mounted the tension jig of the present invention on a geogrid. It is a top view of the tension jig of the present invention. It is a front view of the tension jig of the present invention. It is a left view of the tension jig of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Geogrid 2 Pulling jig 3 Hooking bar 31 Hooking protrusion 4 Pressing bar 41 Pressing protrusion 5 Rack gear 6 Rack gear case 7 Connecting member 8 Bearing bracket 9 Shaft 10 Spur gear 11 Ratchet gear 13 Locking claw

Claims (3)

A hook bar having a hook protrusion, a presser bar, a connecting member having a rack gear mechanism for connecting the hook bar and the presser bar so as to be able to advance and retreat, a spur gear meshing with the rack gear mechanism, and a spur gear A reticulated tension jig comprising a ratchet gear mechanism for rotating a rotating shaft, and a support member for supporting a connecting member, a rotating shaft of a spur gear, and a ratchet gear mechanism. 2. The net-like tension jig according to claim 1, wherein the hook bar and / or the presser bar are detachably attached to the connecting member. The net-like tension jig according to claim 1 or 2, wherein the ratchet gear mechanism includes a ratchet gear that rotates the rotating shaft and a ratchet spanner engaging portion provided at an end of the rotating shaft.

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