JPH0532594U - Tension device for protective nets, etc. - Google Patents

Abstract

(57) [Summary] [Purpose] A protective net used around the construction site is tensioned so that there is no slack. [Structure] A winding drum 6 of a wire 5 is attached to a clamp fitting 4 fixed to a pipe 3 of a temporary scaffold, and a locking portion 8 of a protective net 1 is attached to a lower end of the wire 5 pulled out from the drum 6.
Is provided. The drum 6 is rotated by the rotation operation mechanism 7,
The wire 5 is wound up to raise the locking portion 8, and the protective net 1 locked to the locking portion 8 is pulled up to make it tense.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 This invention relates to a tensioning device such as a protective net used at a construction site.

[0002]

[Prior Art]

 At the construction site, for safety purposes, such as soundproofing and falling objects, etc., should be secured to the temporary scaffolding, etc., for the sake of safety, by installing a protective net attached to the temporary scaffolding and stretching around the building, a protective curtain such as canvas. There are eyelets through which the rope passes, and ropes that pass through the eye are tied to the pipes of the temporary scaffold and stretched.

[0003]

[Problems to be solved by the device]

 By the way, the above-mentioned protective nets are large enough to cover a large area, and are made tough so as not to be easily broken, and have a considerable weight. It was very difficult to tie it up with tension. As a result, the stretched protective net, etc., sagged, resulting in an unsightly appearance. In addition, a large gap was created between the temporary scaffold and the net, and between the adjacent nets.

Therefore, an object of the present invention is to provide a protective net or the like in which tensioning of the protective net or the like can be easily performed, and a gap caused by slack between the temporary scaffold and the net or between adjacent protective nets can be eliminated. Is to provide a tension device.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention is to attach a wire clamp to a pipe of a temporary scaffold so that the winding drum of the wire can be rotated, and to attach a protective net to the lower end of the wire drawn from the drum. It adopted a configuration with locking parts such as.

[0006]

[Action]

 Fix the clamp metal fittings to the pipe of the temporary scaffold according to the height of the protective net, etc., and rotate the take-up drum with the eye of the protective net locked to the locking part provided at the lower end of the wire. The wire is rolled up, the lock is raised, and the protective net is pulled up to make it tight.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings. As shown in FIGS. 1 and 2, a tensioning device 2 of a protective net 1 includes a clamp metal fitting 4 for fixing to a vertical pipe 3 of a temporary scaffold, and a winding drum of a wire 5 attached to the clamp metal fitting 4. 6, a rotation operation mechanism 7 of the drum 6, and a locking portion 8 of the protective net 1 provided at the lower end of the wire 5 pulled out from the drum 6.

The winding drum 6 is axially fixed to the inner surface of the vertical wall 9 of the clamp fitting 4 so as to be rotatable in a horizontal state, and the upper end of the wire 5 wound around the drum 6 is a drum. The wire 5 fixed to the drum 6 and pulled out from the drum 6 passes through a hole 10 provided in the lower wall of the clamp metal member 4 and is pulled out downward.

The rotation operation mechanism 7 of the drum 6 is a hexagonal head 11 mounted on the outer surface of the vertical wall 9 of the clamp 4 so as to be coaxial with the drum 6, and a drum 6 on the inner surface side of the vertical wall 9 integrally with the drum 6. The ratchet pawl 12 provided to rotate, the ratchet pawl 13 attached to the inner surface of the vertical wall 9 so that the tip of the ratchet pawl 12 is engaged with and disengaged from the ratchet pawl 12, and the vertical wall 9 for operating the ratchet pawl 13. The ratchet pawl 13 and the ratchet pawl wheel 12 prevent the drum 6 from rotating in the pulling-out direction of the wire 5 while the ratchet pawl 13 and the ratchet pawl wheel 12 are engaged with each other. When the claw 13 and the ratchet wheel 12 are disengaged, the drum 6 becomes rotatable in the drawing direction of the wire 5.

In order to rotate the drum 6 in the winding direction of the wire 5, a tool such as a box spanner may be connected to the hexagonal head 11 and the hexagonal head 11 and the drum 6 may be integrally rotated.

The locking portion 8 attached to the lower end of the wire 5 has headed pins 16 protruding from the upper and lower four corners of the surface of the rectangular plate 15, and the upper center of the plate 15 is hung from the lower end of the wire 5. The four protective nets 1 can be locked by hooking eyelets 17 provided at the corners of the protective net 1 on the headed pins 16.

The locking portion 8 is not limited to the one shown in the figure, and for example, a structure in which hooks for catching the eyelets 17 of the protective net 1 are arranged in an X shape may be adopted.

The tensioning device 2 of the present invention has the above-mentioned structure, and in order to tension the protective net 1 stretched on the vertical pipe 3 of the temporary scaffold, first, the clamp 1 is placed at a position above the upper end of the net 1. The tension device 2 is fixed by the metal fitting 4, and the wire 5 is pulled out from the drum 6 by a predetermined length, and the eyelets 17 of the net 1 are hooked on the headed pins 16 of the locking portion 8.

Next, the hexagonal head 11 of the rotary operation mechanism 7 is rotated by an appropriate tool to rotate the drum 6 in the normal direction, and the wire 5 is wound up to raise the locking portion 8 and the lower net 1 is pulled up. Get nervous.

At this time, since the ratchet claw 13 is engaged with the ratchet claw wheel 12 and the reverse rotation of the drum 6 is prevented, the locking portion 8 does not descend and the lower net 1 is kept in a tensioned state. .. Although the upper net 1 will be slackened by the amount by which the locking portion 8 is raised, the tension device 2 arranged above the upper net 1 pulls it up in the same manner as described above to absorb the slack and tension it in the upward direction. Just do it.

On the contrary, when the net 1 is to be removed, the lever 14 may be rotated to release the engagement of the ratchet pawl 13 with the ratchet pawl wheel 12, and the engaging portion 8 is lowered by the reverse rotation of the drum 6. Since the net 1 is loosened, the eye 17 can be removed from the headed pin 16.

Note that the locking portion 8 is not limited to the one shown in the figure, and when the upper and lower nets 1 are to be tensioned, headed pins 16 may be provided only on the upper and lower sides of one side of the plate 15.

[0018]

【effect】

 According to the present invention, as described above, the clamp metal fitting can be detachably fixed to any position of the temporary scaffolding, and the clamp metal fitting is provided with a wire winding drum and its rotation operation mechanism, and is pulled out from the drum. Also, since a locking part such as a protective net is provided at the lower end of the wire, if the net is locked at the locking part, it is possible to easily pull up and tension.

[Brief description of drawings]

FIG. 1 is a front view showing a usage state of a tension device of the present invention.

FIG. 2 is a vertical sectional side view of the above.

FIG. 3 is a cross-sectional plan view of the same as above.

[Figure 4] Rear view of the clamp bracket

[Explanation of symbols]

 1 Net 2 Tension Device 3 Pipe 4 Clamp Metal 5 Wire 6 Drum 7 Rotation Operation Mechanism 8 Locking Part

Continuation of the front page (72) Creator Go Yaomoto 44, 227, Hikita, Shinjo-cho, Kitakatsuragi-gun, Nara

Claims (1)

[Scope of utility model registration request] 1. A clamp metal fitting for fixing to a pipe of a temporary scaffolding is attached so that a winding drum of the wire can be rotated, and a locking portion such as a protective net is provided at a lower end of the wire pulled out from the drum. A tension device such as a protective net.