JPS6339773A - Stretching erection method of rope - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention is applicable to the tension construction of a parent rope stretched to ensure the safety of workers at construction sites such as high-rise buildings, for example. This invention relates to a method for tensioning and constructing ropes, which is suitable for use in other applications, and can also be used for tensioning ropes, lifting objects, pulling objects, etc.

(Conventional technology) For example, at a steel structure construction site, steel columns are established,
A framework is constructed by erecting beams between the joints of these steel columns, and subsequent work involves transporting materials and moving workers across the beams.

However, the width of the upper surface of the beam is narrow, and it is necessary to ensure safety so that workers do not fall.

Conventionally, a rope known as a main rope is stretched between the steel pillars along the pointed material, and the looped end of the waist rope tied to the worker's waist is passed through the rope. However, he slipped and fell, and was suspended by a rope around his waist.

(Problem to be solved by the invention) However, in the conventional method of stretching a rope using a main rope, one end of the rope is connected to one steel column, and the other end of the rope is pulled to connect the other steel column. Due to the fact that the rope is attached to the material, there is some sagging in the rope, which makes the worker feel uneasy, and the loop part of the rope around the worker's waist is not slippery. There were safety issues.

The present invention has been made with the aim of improving the above-mentioned problems of the prior art, and is capable of quickly and reliably tensioning the rope, thereby further increasing worker safety. The present invention provides a tension construction method that can be used in the following manner.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, the rope tension erection method according to the present invention includes attaching one end to one fixed side and crimping the free end of the rope to the rope. Attach a rope grip to be fixed, connect one end of a hoisting chain of a tensioner attached to the other fixed side to this grip, and apply tension to the rope by rotating the tensioner to pull the rope. , the rope is installed under tension between fixed parts.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

First, the tensioner 1 used in the present invention is shown in FIG. 4 showing the appearance of the tensioner main body 2, FIG. 5 showing the entire front, FIG. To! As shown in the 1% side view, the tensioner main body 2 has a flat and substantially rectangular shape, and a winding shaft 4 in the width direction is rotatably installed inside one end of a casing 3 of a mid-aligned structure formed by casting or the like. Supported. This winding shaft 4 has one end projected outside the casing 3, and this projecting end is a square shaft and serves as a rotation operation part 6 into which a tool such as a ratchet wrench 5 can be fitted to perform a winding operation.

A chain wheel 8 on which the chain 7 is wound is formed in the axially intermediate portion of the hoist 4, and a ratchet wheel 9 is formed on the side of the chain wheel 8 on the rotation operation section 6 side. In FIG. 7, the cutting positions of this winding @4 are shown as being cut at the chain foil 8 part in the left half and at the ratchet foil 9 part in the right half.

A ratchet pawl shaft 10 is provided parallel to the winding shaft 4 at a position apart from it, and a ratchet pawl 11 is supported on this shaft 10, and this ratchet pawl 11 is supported by a spring 1.
2, the ratchet coil 9 has a habit of constantly engaging with the teeth 9A of the ratchet boiler 9.

This ratchet pawl 11 has a contact surface portion 11A that is placed in a substantially horizontal direction when engaged with the ratchet wheel 9, and a control that controls the operation of the ratchet pawl 11 via this contact surface portion 11A. A cam mechanism 13 is provided.

The control cam mechanism 13 is provided rotatably in a direction perpendicular to the ratchet pawl shaft 10 on the narrow end side of the casing 3. The projecting end is an operating section 15 that is rotated by a tool or manually.

On the mode selection shaft 14, there is a fixing cam 16 that restrains the ratchet pawl 11 in the engaged state with the ratchet wheel 9.
What is the release cam 17 that presses the end of the contact surface 11A of the ratchet pawl 11 opposite to the pawl and restrains the ratchet pawl 11 in a position where it does not engage with the teeth 9Δ of the ratchet wheel 9? However, the ratchet pawl 11 is pushed away by m9A of the ratchet wheel 9 at the middle of these cams 16 and 17 so that it can freely escape.

As shown in FIG. 4, an indication 18 indicating whether the ratchet pawl 11 is "fixed", "rolled", or "released" is made around the part of the selection shaft 14 of the casing 3 where the operating part 15 protrudes. When set to the "fixed" position, the fixing cam 16 hits the claw side of the contact surface 11A of the ratchet pawl 11, and the ratchet pawl 11 is restrained in a state engaged with the ratchet wheel 9. When set to the "winding" position, The cams 16 and 17 also separate from the abutment surface 11Δ, and the ratchet pawl 11 freely swings 1'I in the escape direction, and when it is set to the "open" position, the opening cam 17 comes into contact with the ratchet pawl 11. By pressing the end of the contact surface portion 11A opposite to the claw, the ratchet claw 11 is restrained in a non-engaging state with the ratchet foil 9, and the ratchet foil 9 is placed in a free state.

A hook is connected to one end of the casing 3, and a cutout hole 20 is provided at the other end of the casing 3, through which a chain 7 to be wound around a chain foil 8 comes out.

Next, the rope grip 21 may be any suitable grip as long as it can be clamped onto the rope 22, examples of which are shown in FIGS. 8 to 10.

As shown in FIG. 8 as a front view, as shown in FIG. 9 as a side view, and as shown in FIG. 10 as a longitudinal cross-section of FIG. ,
Inner surface of 23A 1) 0 There is a pair of left and right at the rear, and the middle part is the shaft 2.
4. Four arms 25, 2 swingably supported by 24
5. . . . The bottom 2 of the holder 23 is pivotally supported by a pin 26.26 at the lower end of these arms 25.25.
Rope presser 27 and arm 2 are moved parallel to 3B.
A link U pivoted at the upper end of 5°25 by a pin 28.28
two rods, a spring 30 that biases the arm 25.25 in the upright direction, one end of the chain 7 of the tensioner 1 connected to one of the pins 28 of the connecting rod 29, and a sub rope 22;
' and a connector 31 that connects one end of the connector.

Therefore, the arm 25.25 is placed in the tenth position against the spring 30.
When the rope presser 27 is moved upward by swinging counterclockwise in the figure, the rope presser 27 moves to the bottom 23B of the holder 23.
The arm 25. is separated from the arm 25.
25 is returned, the rope presser 27 comes into close contact with the rope 22 due to the bias of the spring 30, and when the connector 31 is biased in the direction of pulling, the rope presser 27 presses against the rope 22 and clamps the rope 22 without slipping. Become. Note that if the rope 22 is thick and it is not easy to pass it between the rope presser 27 and the bottom 23B of the holder 23, use the locking pin 32 at the end of the shaft 24.24 that pivots the arm 25.25. 1. Separate arm 25.25 and rope presser 27 from holder 23, drop loaf 22 into holder 23, then drop rope presser 27 and arm 25.25 again, and press shaft 24.24. It may be pivoted.

Next, the method of tensioning and constructing the parent rope using the above-mentioned tensioner 1 and rope grip 21 is shown in Fig. 1<A) to (
This will be explained with reference to D).

First, the -) of the loaf 22, which will serve as the parent rope, is connected to the engaging portion 34 provided on one of the steel pillars 33 via a hook or the like, and the [''-b grip 21 described above is attached to the free end of this rope 22. Install it.

Next, attach the sub rope 22' to the connector 31 of this rope 21.
Connect one end of the .

On the other hand, the hook 19 of the tensioner 1 is engaged with the engaging part 36 provided on the other steel column 35, and the winding side end of the chain 7 of the tensioner 1 is connected to the connector 31 of the rope grip 21. (as shown in FIG. 1(A)).

After setting in this way, turn the selection shaft 14 of the tensioner 1 to set it to "winding", and set the other end of the chain 7 as shown in Fig. 1<A).
When pulled in the direction of the arrow, the ratchet wheel 9 rotates and tension is applied to the rope 22 to some extent. Furthermore, the ratchet wrench 5 is fitted into the operation part 6 of the winding shaft 4, and the
When the rope 22 is rotated in the direction of the arrow B), tension is further applied to the rope 22, and the other end of the sub-loaf 22' becomes able to engage with the engaging portion 36 of the steel column material 35 via a hook or the like. Figure 1 (C)).

Then, when the selection shaft 14 of the tensioner 1 is set to the "open" position, the ratchet pawl 11 is removed from the ratchet foil 9, the chain 7 is loosened, and the hook 7 can be removed from the dowel material 35 and the rope grip 36. From now on, see Figure 1 (D
＞J: The tension state is maintained between the sea urchin rope 22 and the sub rope 22'.

When tensioning the rope 22 in this way, if the tensioner 1 is to be attached or left unattached to each parent rope, tighten the tensioner 1 around the ratchet handle 5 as shown in the second figure to apply tension to the rope 22. If the selection @14 is later set to "fixed", the ratchet foil 9 will remain locked by the ratchet pawl 11, and the tensioned state will be maintained.

Without removing the rope 122, as shown in FIG.
When one end of the chain 7 is engaged with the engaging portion 36 of the steel column material 35 and the hoisting shaft 4 is hoisted up using the ratchet wrench 5, the row 122 is pulled and the sub rope 22' becomes loose. (Fig. 3 (B)) The end of the subrow 122' can be removed from the engagement part 36 of the steel column 35, and then by returning the selection shaft 14 to the "open" position, the chain 7 will loosen and can be easily removed. be able to.

In addition to the above examples of use, the present invention can of course also be used for tensioning ropes, lifting and lowering objects, pulling objects, etc.

〔Effect of the invention〕

As explained above, the rope tension erection method according to the present invention involves attaching one end to one fixed side (a rope grip is attached to the free end of the rope to be fixed by crimping it to the rope, and this grip is attached to the other fixed side). One end of the hoisting chain of a tensioner attached to the fixed side is connected, and the tensioner is rotated to pull the rope to apply tension to the rope, and the rope is tensioned and installed between the fixed parts. As a result, even if the rope is thick and suspended in the air, it can be easily stretched under tension without loosening with a small amount of force, further increasing the safety of workers, eliminating any sense of anxiety, and reducing the amount of work that can be done. This can greatly contribute to improving work efficiency.

[Brief explanation of drawings]

Figures 1 (△) to (D) are explanatory diagrams showing the rope tension construction process according to the method of the present invention, Figure 2 is an explanatory diagram showing an example of the method, and Figures 3 (A) to (C) are the same. An explanatory diagram showing the removal process,
Fig. 4 is a perspective view of an example of the tensioner main body used to carry out the method of the present invention, Fig. 5 is an overall front view of the same, and Fig. 6 is a front view of a half of the tensioner main body shown in Fig. 4. 7 is a longitudinal sectional side view of the same, FIG. 8 is a front view showing an example of the rope grip, FIG. 9 is a side view of the same, and FIG. 10 is a longitudinal sectional view of FIG. 8. 1... Tensioner, 2... Tensioner body, 3... Casing, 4... Winding shaft, 5... Ratchet wrench,
6... Rotation operation unit, 7... Chain, 8... Chain foil, 9... Ratchet wheel, 10... Shaft, 1
1... Ratchet pawl, 11A... Flat surface part, 12.
...Spring, 13...Control cam rock structure, 14...Mode selection axis, 15...Operation unit, 16...Fixing cam, 1
7... Opening cam, 18... Display, 1... Hook, 20... Notch hole, 21... Rope grip, 2
2... Rope, 22'... Sub rope, 23...
Holder, 24... Information, 25... Arm, 26.28
...Bin, 27...Rope presser, 2...Connecting rod, 30...Spring, 31...Connector, 33.35...
- Steel column material, 34.36...engaging part. Applicant's agent Mr. Sato Figure 10

Claims (1)

[Claims] 1. A rope grip that is crimped and fixed to the rope is attached to the free end of the rope with one end attached to one fixed side, and the rope grip is attached to the other fixed side for hoisting a tensioner. 1. A method for tension-erecting a rope, which comprises connecting one end of a chain, rotating the tensioner to pull the rope to apply tension to the rope, and building the rope under tension between fixed parts. 2. The tensioning includes a winding shaft which has a chain wheel and a ratchet wheel for winding the chain in the casing and can be rotated from the outside by a ratchet handle, and a ratchet claw which can freely engage the teeth of the ratchet wheel. , a fixed position that restrains the ratchet pawl in an engaged state with the ratchet foil, a winding device that allows rotation of the ratchet foil only in the winding direction, and an open position that restrains the ratchet pawl in a non-engaged position with respect to the ratchet foil. 2. A rope tensioning method according to claim 1, characterized in that a tensioner is used which has a control cam mechanism for selecting a tensioning device.