JPS625181Y2 - - Google Patents

Description

[Detailed description of the invention] When working at heights, for example on power transmission towers, guide rails for lifting and lowering are attached to the top and bottom of the tower, and horizontal guide rails are attached to each horizontal position, and fall prevention safety devices are attached to these guide rails. Fall prevention devices are used in which the tip of a rope or the like that is engaged and tightened by these fall prevention safety devices is connected to a safety belt or the like that is fixed to the worker's body. In the unlikely event that you trip, the above-mentioned fall prevention safety device will operate to prevent a major accident.

When a worker climbs a steel tower, a safety belt is connected to a rope that is tightened to a fall prevention safety device that is engaged with a climbing guide rail. slide.

When you have finished climbing to the desired height and want to move laterally, disconnect the safety device engaged with the lifting guide rail and release the rope tightened to the safety device engaged with the horizontal guide rail. Connect the safety belt, etc. and take action. If a new rope is to be connected after the previously connected rope is released during such connection and release operations between ropes and belts, etc., even if it is for a short time, any of the ropes Workers will not be supported even if Therefore, in order to prevent an unexpected accident from occurring even within such a short period of time, the system is designed such that when changing the connection, the previously connected rope will not be released until the new rope connection is completed. Several locking devices have already been proposed.

The purpose of the present invention is to be the same as the above-mentioned one, but it is a locking device based on a novel idea in which the lock is released using a magnetic hook fastened to the end of the rope. It provides:

The embodiments shown in the drawings will be described below.

Figure 1 shows the appearance of the lock fitting. 1 shows the entire locking fitting, and as shown in Fig. 2, the entire locking fitting is usually made of non-magnetic or small magnetic metal material, except for the engaging piece that constitutes the movable locking mechanism 2. It is formed by. The outer shape of the base body 3 is an integral shape with one side of a rectangle protruding into a semicircular shape, and the semicircular portion is a portion forming an arm 13 to be described later, and the rectangular portion is a portion forming a base 10. An operating space 6 for the movable mechanism 2 is formed surrounded by one side of the rectangle of the base 10 and the arm 13, and a movable mechanism support portion 4 is formed on the surface of the base 10 facing the arm 13. Further, a relatively narrow insertion hole 5 is provided behind the movable mechanism support portion 4 in the base portion 10 for passing a safety belt or the like therethrough. Lock fitting 1 shown in Figure 1
As can be seen from the appearance, the base body 3 is bent upward at an angle at the end where the belt etc. insertion hole 5 is formed, and when the main lock fitting 1 is attached to the belt, the part of the movable mechanism 2 It is designed so that it protrudes above the surface of the human body and is easy to operate. Note that 7 is a rotating ring that makes it easier to insert and remove the belt. An irregular semicircular recess 8 is formed in the center of the base 10 on the opposite side of the belt insertion hole 5. One end extends in the direction of expanding the semicircle, forms a trapezoidal protrusion 9 toward the space 6, and dips down again, forming a depression 11 toward the space 6 between it and the end of the arm 13. . The other side extends in a direction slightly wider than the semicircle, extends slightly in the right angle direction at a position lower than the protrusion 9, and protrudes again to form the space 6.
A protrusion 9' having the same shape as the trapezoidal protrusion 9 described above is formed thereon, and a recess 12 is further formed and connected to the arm 13. The central portion of the arm 13 is formed as an arm portion 22 that is slightly thinner than the thickness of the arm 13 portion. Further, an appropriate number of caulking holes 14 are formed in the movable mechanism support portion 4 at appropriate intervals.
The locking rod 15 has a cross shape as a whole, but one end of the first arm 16 that constitutes this is split into two to form a seat 17, and when assembled, the arm 22 is held between them. . The other end of the arm 16 has a circular shape to fit into the recess 8, and a hole 18 for supporting the shaft is bored in this circular portion. Locking rod 15 is arm 1
3. The space 6 formed by the arm portion 22 and the base portion 10 is divided to form two hook support portions.

A second arm 20 having retaining plates 19 at both ends is projected in both directions at right angles from a position slightly extending toward the seat 17 from the hole 18. When the locking rod 15 is pivotally supported in the hole 18, magnetic balls 21 are inserted in advance into the spaces formed by the second arm 20, the stop plate 19, and the base 10, respectively. The locking fitting 1 of the present invention is attached to a belt or the like, and is used with the upper side facing up and the lower side facing down in the drawing, and the balls 21 are always located at the lowest position allowed in each space. In the illustrated position, the locking rod 15 has an upper trapezoidal protrusion 9
Rotation in the counterclockwise direction is prohibited by the ball 21 in the space between the outer slope of the arm 20 and the stop plate 19, and the lower trapezoidal protrusion 9' and the lower arm 20 with the stop plate 19 are prevented from rotating in the counterclockwise direction. The ball 21 interposed between the two prevents clockwise rotation and is fixed at a certain position. In the figure, locking rod 15
A hook metal fitting, which will be described later, is connected to the upper section which is divided into two parts by , and therefore, in this fixed position, the tip of the locking rod 15 is attached from above, that is, to the upper end of the arm 22. It is designed to be. As will be described later, if the lower ball 21 is attracted upward with a magnet, the ball 21 will be able to get off the top of the protrusion 9', so if the locking rod 15 is rotated clockwise by hand, the ball 21 will be removed. 21 moves onto the upper inclined surface of the protrusion 9', while the upper ball 21 falls between the arm 20 and the top of the protrusion 9 due to the distance of the arm 20 from the projection 9, and moves counterclockwise. Rotation in the direction is prohibited. Insert the ball 21 as described above between the arm 20 having the stop plates 19 on both sides of the locking rod 15 and the uneven surface, fit the catch 17 into the forearm 13, and insert the ball 21 into the forearm 13.
4. The two non-magnetic support plates 23 with holes corresponding to the shaft holes 18 and the like are aligned on the top and bottom of the base body 3 and caulked and fixed, thereby completing the assembly of the lock fitting used in the present invention.

FIG. 3 shows an example of a hook used with the locking fitting 1 described above. The hook fitting 31 is preferably made of a non-magnetic or weakly magnetic metal material. 32 is a hole for a rope to be connected to a safety device provided at one end. A ring 33 is fitted to prevent friction with the rope. A hook is formed at the other end, and an opening 34 is provided inside the hook in the longitudinal direction of the hook fitting 31. Reference numeral 35 denotes a metal fitting for opening and closing the aperture 34, one end of which is fixed on the main body of the hook metal fitting 31, and a coil spring 36 supported on the main body of the hook metal fitting 31 between the other ends.
As a result, the opening/closing fitting 35 always keeps the opening 34 closed at the other end. Reference numeral 37 denotes a fixing fitting for locking the opening/closing fitting 35, and one end thereof is fixed with a shaft on the side opposite to the opening/closing fitting 35 in the figure, that is, the opposite side of the hook opening 34, and there is a lock between the other end. Similar to the opening/closing fitting 35, a coil spring is interposed between the hook fitting 31 and, under normal conditions, projects outward from the pivoted portion. An engaging portion 39 is provided at one end of the upper edge of the fixing fitting 37 near the pivoting portion, and comes into contact with one end of the opening/closing fitting 35 when the opening 34 is closed. To open the hole 34 from the open state, first press the fixing fitting 37 against the force of the coil spring 38, and the engaging portion 39 will open.
is removed, and then the opening/closing fitting 35 is removed in this removed state.
When pressed, a hole opens. When this pressure is released, both metal fittings return to their original positions. Reference numeral 30 denotes a magnet which is provided with a recessed portion at the top of the hook metal fitting 31 and is embedded and fixed in this portion by brazing or other means. When the opening/closing fitting 35 is fully opened by pushing the opening/closing fitting 35, the entrance portion of the opening 34 is located at the arm 2 of the locking fitting 1.
2, that is, the thin part, is formed so that it has a width that allows it to be inserted. After insertion, attach the hook metal fitting 3.
1 to a thick part such as the arm 13.

Now, as explained at the beginning, when working by climbing up a steel tower, the worker engages the hook fitting 31 of the present invention, which is tightened at the end of the rope, which is tightened with the safety device engaged with the elevating guide rail. . In this case, push the opening/closing fitting 35 of the hook fitting 31 to open the hook, pass the hook from the inside of the arm 22 of the locking fitting 1, close the opening/closing fitting 35, and insert the hook into the top of the inserted hook fitting 31. When the magnet 30 is brought close to the magnetic ball 21 and the magnet portion is moved upward from below, the ball 21 is moved toward the inner slope of the protrusion 9' by the attraction force of the magnet 30, and the ball 21 21, the protrusion 9', and the arm 20 are released. While releasing the lock in this way, if the locking rod 15 is rotated clockwise by hand, the tip of the stop plate 19 enters the recess 12, and at the same time, as already explained, the upper ball 2
1 is lowered and moved to the lower position as shown in the figure, and the protrusion 9, ball 21, and arm 20 form a lock. At this time, the tip of the locking rod 15 is at the lower end of the arm 22. By rotating the locking rod 15, the hook fitting that has been inserted above the thin arm portion 22 can be pulled out. Conversely, pass the hook metal fitting 31 through the thin arm portion 22 and fit it onto the upper arm 13, and attach the upper ball 21 with the magnet 30.
By pulling up, the locking rod 15 can be rotated counterclockwise.

According to the present invention, one feature is the use of a magnet, and this magnet is combined with a hook fitting that is naturally used in this type of locking device, and the lock is normally released by adding a new hook fitting to the other section. Only when the hook is inserted, the newly inserted hook is locked at the same time, making the work of replacing the hook extremely reliable, and its structure is relatively simple. Its practicality can be fully expected.

[Brief explanation of the drawing]

Figure 1 is a top view of one example of the locking fitting used in the present invention, Figure 2 is a sectional view of the locking fitting shown in Figure 1, and Figure 3 is a sectional view of the locking fitting shown in Figure 1.
The figure shows an example of a hook fitting used in the present invention. 1...Lock fitting, 2...Movable locking mechanism, 3...
... Base body of lock fitting, 4 ... Movable mechanism support part, 5 ...
...Belt insertion hole, 6... Space for movable mechanism, 7...
Belt ring, 8... recess of movable mechanism support part,
9, 9'... Trapezoidal protrusion, 10... Base, 1
1, 12... recess, 13... arm, 14... caulking hole, 15... locking rod, 16, 20... arm bar, 1
7... Seat, 18... Hole for shaft support, 21... Magnetic ball, 22... Thin arm, 23... Non-magnetic support plate,
31...Hook fitting, 32...Rope hole, 33
...Ring, 34...Hook opening, 35...Opening/closing fitting, 36, 38...Coil spring, 37...Fixing metal fitting, 39...Engaging part on fixing metal fitting, 30...
Magnet.

Claims (1)

[Scope of utility model registration request] An irregular semicircular recess 8 is formed in the center of the surface facing the arm 13 of the base body 3, which is provided with an arm 13 having an insertion hole 5 for a belt or the like and an arm 22 thinner than the arm 13 through which a hook metal fitting is inserted. At the same time, a trapezoidal protrusion 9 and a depression 11 are sequentially formed from the end of the recess 8 which is the upper side in use, and the end of the recess 8 which is the lower side in use is slightly extended in the right angle direction to form a trapezoidal protrusion 9. ' and a recess 12 in this order, the end of a locking rod 15 is disposed in the recess 8 and rotatably supported, and a stop plate 19 projects from the locking rod 15 in both directions. A magnetic ball 21 is interposed in the space created by the protrusion 9 and the recess 11, and the space created by the arm 20 and the protrusion 9', and with the belt etc. insertion hole 5 of the base body 3 being vertical, The lower ball 21 is located between the outer slope of the protrusion 9 and the arm 20 having the stop plate 19, and the lower ball 21 is located between the outer slope of the protrusion 9 and the armrest 20 having the stop plate 19.
between the top of the locking rod 15 and the arm 20 having the stop plate 19, the tip of the locking rod 15 can be fixed at the upper end of the arm 22 through which the hook is inserted;
and the lower ball 21 is located between the inner slope of the protrusion 9' and the arm 20 with the stop plate 19, and the lower ball 21 is located between the top of the locking rod 15 and the arm 20 with the stop plate 19.
The tip of the lock fitting 1 can be fixed at the lower end of the arm portion 22 through which the hook is inserted, and the arm portion 22 through which the hook metal fitting is inserted.
It is made up of a hook fitting 31 with a magnet, which has a hook opening 34 having an entrance part that can be inserted through the hook but cannot be inserted with the arm 13, and a magnet 30 attached to the top of the hook, and the magnet 30 moves the magnetic ball 21. A locking device for a fall prevention device, characterized in that the fixing position of the locking rod 15 is changed.