JPS6348551B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a safety device used for ascending, descending, and horizontal movement of workers to power transmission towers, etc.

[Prior art and problems]

Safety devices are used to protect the safety of workers during overhead line work and maintenance work on power transmission towers, construction work on high-rise buildings, and maintenance work on exterior walls.

As an example of such a safety device, as shown in FIG.
Attach the horizontal rail 3 to the crossbeam 4, connect the safety device that engages with the lifting rail 2 and the horizontal rail 3 to the worker, and prevent the worker from moving from the vertical direction to the horizontal direction. Switch P shown
According to Utility Application No. 55-50776, a device is constructed in which the direction of the safety device is changed and the safety device is always engaged with one of the rails during the worker's work to prevent the worker from falling. (Utility Model Application No. 56-152667) ``Fall Prevention Safety Device'' is proposed.

An example of the safety device is shown in a side view in FIG. In the figure, a metal frame 11 has an open groove in its lower part that accommodates the vertical rail 2 or the horizontal rail 3, and a plurality of grooves are supported in the open groove in a direction perpendicular to each other. roller 12
and 13, the lift rail 2 or the horizontal rail 3 is held between the rails 13 and 13, so that it can slide on the rails.

Further, the opening groove reaches the upper part of the frame 11, and the operating rod 14 is rotatably attached to the opening groove of the frame 11 by a rotating shaft 15 to the opening groove connected to the upper part. A ring 16 for connection with an operator is connected to one end of the operating rod 14, a corrugated shoe 17 is formed at the other end, and a protrusion 18 is formed in the middle.
Although the operating rod 14 is not shown, it is moved to the position shown by the solid line in the figure when no force is applied due to the spring fixed to the frame 11. Retained. When the worker ascends along the lifting rail 2, the operating rod 14
is being pulled in the direction of the double arrow while lifting rail 2
slide on top. At this time, the operating rod 14 is prevented from rotating any further by a stopper 20 protruding from the open groove of the frame 11. Needless to say, if a sudden force is applied to the operating rod 14 in the direction shown by the arrow, the operating rod 14 will rotate clockwise and the corrugated shoe 17 will come into contact with the rail 2, at which point the operating rod 14 will rotate clockwise. Stop.

When the safety device slides on the lifting rail 2 and reaches the switch P shown in FIG. Therefore, it passes over this protrusion 6 and comes over the switch P. Here, switch P is 90
degree, press the knob 21 of the safety device against the spring (not shown), rotate the operating rod 14 to the position shown by the dashed line, and release the spring. 20 and the operating rod 14
The protrusion 18 is held in a position where it closely faces the horizontal rail 3, the corrugated shoe 17 is separated from the surface of the horizontal rail 3, and the safety device is not braked and slides freely on the horizontal rail 3.

Conversely, if the safety device is switched from the horizontal rail 3 to the lifting rail 2, if there is no protrusion 6 on the lifting rail, the stabilizer will move down the lifting rail 2 without any restraint. Since such a situation is dangerous, the projection 18 of the operating rod 14 and the projection 6 on the lifting rail 2 are configured to engage with each other and prevent the safety device from being lowered any further. When the operating rod 14 is unlocked, the safety device passes through the protrusion 6 and is held in a position where the corrugated shoe 17 can act, operating so as to maintain the safety of the worker connected to the safety device. .

By the way, as can be understood from the explanation, the safety device described above is used when the operating rod 14 is locked on the horizontal rail 3 by the stopper 20 and the engagement hole 19, and if the user forgets to unlock it, the user forgets to unlock it. This system focuses on the function of preventing the safety equipment from falling when moving to the elevator rail 2. However, when the worker ascends and descends along the elevator rail 2, even if the safety equipment is inserted into the elevator rail 2, the above-mentioned operation will not occur. The rod 14 can be locked in the non-braking position by the stopper 20, and if the operator accidentally operates the operating rod 14,
There is also the possibility of the aircraft crashing without any resistance. From this point of view, it is dangerous if the vehicle is not reliably maintained on the safe side, especially when going up and down.

For the purpose of avoiding such dangers, a safety device as shown in the sectional view in FIG. 4 is effective. This safety device is disclosed in Japanese Patent Application No. 55-102810
No. 29371), "Safety device for both lifting and horizontal movement" is disclosed, and the outline is as follows.

In the figure, a plurality of rollers 3 are provided at the bottom of the frame 31.
2 are attached so as to sandwich both sides of the elevating rail 2. Although not shown, these rollers 32
A sliding roller is also installed in the direction perpendicular to the direction.
Reference numeral 33 denotes a side wall formed integrally with the frame body, and between the both side walls 33, the brake frame 34 is connected to the rotating shaft 35.
A ring 16 for connection with the operator is coupled to one end of the brake frame 3, and an insertion hole 36 through which the rail 2 is inserted is formed at the other end.
4 is engaged with a spring 37 whose one end is fixed to the frame 31. Although not shown, a stopper 38 protruding inward from the frame body 31 is held on the side wall 33 by a spring (not shown), and the rotation of the brake frame 34 in the direction A shown in the figure is prevented. When a worker ascends the tower along the lifting rail 2, the safety device is pulled in the direction of arrow A in the figure, and the insertion hole 36 forming the braking surface of the brake frame 34 is inserted into the front and back surfaces of the lifting rail 2 while holding the rail 2. The insertion hole 36 can be pulled up by sliding the
A hole is formed diagonally with respect to the longitudinal direction of the brake frame 34 so that the brake frame 34 can be pulled up smoothly in such a pulled-up position. If a fall occurs while the worker is ascending, the brake frame 34 rotates in the direction of arrow C, and the upper and lower surfaces of the insertion hole 36 become brake surfaces and come into contact with the front surface 2' and back surface 2'' of the rail 2. securely place the safety device on the rail 2.

When the target height is reached and the vehicle moves sideways, remove the safety device from the end of the rail 2, open the stopper 38 once, rotate the brake frame 34 in the direction of arrow A shown in the figure, and make the stopper 38 protrude again. For example, the brake frame 34 is held at the position shown in the figure, and if the safety device in this state is passed from the end of the horizontal rail 3, the restraint by the brake frame 34 in the lateral direction is released, and the safety device is placed on the horizontal rail. There will be no braking at .

With the configuration described above, it is possible to prevent the operator's erroneous operation during lifting and lowering as described in connection with the safety device in FIG. 3.

However, as can be understood from the above explanation, when changing the safety device from the vertical rail 2 to the horizontal rail 3, the safety device will leave the rail once and it is not completely secure, so there is no safe place. It's a problem if you can't get it on the tower.

[Structure of the invention]

Therefore, in the present invention, in order to solve the above-mentioned problems, an improved safety device is constructed based on the above-mentioned safety device, and corresponding to the safety device, a safety device is also installed at the turning area and the horizontal rail. The present invention has been improved to provide a safety device for lifting and lowering and horizontal movement, which does not cause erroneous operation during use and prevents the safety device from detaching from the rail system.

Examples of the present invention will be described below.

5A and 5B are a front view and a side view of a safety device used in the safety device of the present invention, and FIG. 6 is a brake frame incorporated into the safety device of FIG. 5.

In the figure, a frame body 41 is formed of stainless steel or aluminum casting. The frame body 41 has edges 42 bent inward from both ends in the direction in which the rail 2 passes, and the space between the edges 42 is open, and the space between the edges 42 and the beam portion 43 of the frame body 41 is A roller 44 is pivotally attached to each of the rails 2, and a roller 45 is pivotally attached to the beam portion 43 in a direction transverse to the rail 2.
As a matter of course, this safety device is designed to be in a sliding state when inserted into the lifting rail 2 or the horizontal rail 3.

46 is a brake frame, the structure of which is illustrated in FIG. This point will be described in detail later, but the brake frame 46 is rotatably attached to the sleeve portion 48 of the frame body 41 by a shaft 47.

The braking frame 46 is formed in a U-shape, and both opposing fin tips at the open end are formed as braking portions 49 having a U-shaped cross section, and the rail 2 is inserted through the braking portions 49 having both U-shaped cross sections. When the brake frame 46 is maintained at an appropriate angle, it slides smoothly, and when it deviates from a certain angle, it is shaped so that it engages with the front surface 2' and rear surface 2'' of the rail 2.

The surface of the brake part 49 that comes into contact with the front surface 2' and the rear surface 2'' of the rail 2 may be a rough surface that particularly increases the coefficient of friction.The brake frame 46 having such a structure is pivoted by the shaft 47 as described above. , braking frame 46
is connected to frame 41 by spring 50 and is normally in the upright position shown in FIG. 5B. 51 is the frame 46
It is a stopper that protrudes inward from the sleeve part 48, and has a spring mechanism so that it is retracted from the inside of the sleeve part 48 of the frame body 46 by pulling the knob 52, and always protrudes inward when the knob 52 is released. It is configured using If there is no rail 2, rotate the brake frame 46 in the direction shown by arrow a against the spring 50, pull the knob 52 to retract the stopper 51, and open the hole 53 provided on the brake frame 46. is aligned with the position of the stopper 51, and when the hole 53 and the stopper 51 meet, the knob 52 is released, and the stopper 51 can fix the brake frame 46 at that position.

The parts described above have the same functions as the safety device shown in FIG. 4, but in the present invention, slide keys 54 protruding from both sides of the frame 41 are provided. This slide key 54
When moving from the vertical rail 2 to the horizontal rail 3 or vice versa, it acts as described below.

FIG. 7 shows an example of a turning section where the safety device of the present invention changes direction from the lifting rail 2 to the horizontal rail 3. The switch P is constituted by a rail piece 5 rotatably supported between a divided horizontal rail 3 that separates a lifting rail 2d from below and an lifting rail 2u further upwards, and is perpendicular to this. A protrusion 60 and a switching table 55 are formed on the horizontal rail 3 at a position close to the switch P, which perform functions to be described later.

The switching table 55 has a notch in the sliding surface of the horizontal rail 3 in the length direction of the rail, leaving only a supporting portion 56.
The length of this notch is approximately the same as the length of the safety device described above.

This notch and the horizontal rail 3 connected to it
Two auxiliary guide plates 58 having key grooves 57 are fixed by bolts through screw holes 59 from both sides of the horizontal rail 3, including both ends thereof, forming a part of the rail system. With this configuration of the switching table 55, when the safety device is at this position, both slide keys 54 of the safety device can slide into both key grooves 57, and are designed to prevent them from slipping out from the rail system. Ru. Such a switching table 55 is provided at each position where the horizontal rail 3 is entered from the switch P of each upper and lower stage.

Further, a protrusion 60 is provided on the surface of the rail 3 in front of the switching table 55 from the lifting rail 2d side.
Although not shown, a similar protrusion 60 is also provided at the lowermost end of the elevating rail 2d.

When the brake frame 46 of the safety device is fixed in an oblique position (uncontrolled position) by a stopper 51 provided on the frame body 41, the protrusion 60 on the horizontal rail 3 is located at the end of the brake frame 46. is located close to the top surface of the rail 3, so the height of the protrusion 60 is made larger than this, and the roller is positioned exactly as shown at S on the rail surface 2' in FIG. 5A, that is, the roller 45, but if the brake frame 46 is fixed in the above state, the brake part 49
It is placed at a position where it meets the bottom edge of the

〔motion〕

The safety device configured as described above is engaged from the lower end of the lifting rail 2 in the unlocked state with the left side of the safety device facing upward in FIG. 5B, that is, in the braking possible position,
When a worker climbs up a steel tower, the control frame 46 is restricted from rotating by the positioning stopper 51 and slides smoothly on the rail surface, and if the worker is about to fall, it will be dangerous. The braking frame 46 connected to this by the coupled ring 16 rotates in the direction of arrow C, and the braking part 49 that wraps the rail 2 from the front and back comes into contact with the front surface 2' and the back surface 2'' of the rail, and due to frictional force, Stop the safety device in that position.

When the safety device reaches the switch P, the operator manually transfers the safety device to the switch P, rotates it 90 degrees, and transfers it to the direction of the switching table 55 of the horizontal rail 3. In this state, the safety device can be moved onto the switching table 55 without the protrusion 60 on the rail 3 becoming an obstacle as described above. On the switching table 55, the brake part 49 is disengaged from the rail surface, and the safety device is engaged by the slide keys 54 forming the engaging parts on both sides thereof and the key grooves 57 of both auxiliary guide plates 58 forming the rail system. state is maintained. At this time, as mentioned above, the brake part 49 is separated from the rail surface, so if the stopper 51 is opened and the brake frame 46 is pushed in the direction of arrow a and fixed, the brake frame 46 will be in the non-braking position, and then the safety device will be turned off. It can slide smoothly in the opposite direction to the switch P.

When moving from the horizontal rail 3 to the elevating rail 2, if you forget to unlock the brake frame 46 at the switching table 55, the protrusion 6 on the rail 3
It is stopped by 0 and cannot proceed further. When unlocked at the switching table 55, the brake frame 46
is in a braking position and can be lowered in the opposite direction.

Such a protrusion 60 on the rail is on the rail piece of the switch P, on the other horizontal rail 3, or
Although it may be provided on the elevating rails 2d and 2u, it is desirable to provide it closer to the switching platform when viewed from the bottom of the steel tower.

Moreover, in each upper and lower stage switch P, a protective wall 61 is formed on the same circumference surrounding the rail piece 5. The portions where the vertical rails 2d and 2u intersect with the horizontal rail 3 are cut out, and for example, the cutout corresponding to 2d is one of the slide keys 54 shown in FIG. 5A.
Width slightly wider than length a between and the side of rail 2
a′, and the other slide key 54
Width slightly wider than length b between and the side of rail 2
The protective wall 61, which is formed to have the shape b' and has the cut portion, is fixed by each rail, and the rail piece 5 is rotatably fixed thereon by a rotary disk. The height H of the protective wall 61 is set higher than the height of the rail 2.

Since it is formed in this way, the safety device can be moved in and out of the switch P without any trouble, and it will not come out of the switch P while the rail piece 5 is rotating.

〔Effect of the invention〕

According to the above configuration, the safety device will never be able to get out of the rail system while the worker is working.
Since there is a protrusion on the rail on the elevating rail side or the lowering side of the switching table, the safety device will not enter the elevating rail without braking, or it will stop at the protrusion on the elevating rail and will not move other than the switching table. It is extremely safe because the brake frame cannot be operated at that point.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a rail and switch on a pylon engaged with a conventional safety device, and FIG. 2 specifically shows the switch section. 3 and 4 are side views of a conventional safety device. FIGS. 5A and 5B are a front view and a side view of a safety device used in the present invention as an example. FIG. 6 is an external view of the brake frame pivotally attached to the safety device shown in FIG. 5. FIG. 7 shows the switch section and switching table of the safety device shown in FIG. 5. FIG. 8 illustrates a safety protection wall in a switch. 1... Steel tower, 2... Lifting rail, 3... Horizontal rail,
41... Frame body, 42... Edge of frame body, 43... Beam of frame body, 44, 45... Roller, 46... Brake frame, 47...
Rotating shaft, 48... Sleeve portion of frame body, 49... Braking part of brake frame, 50... Brake frame holding spring, 51... Positioning stopper, 52... Knob, 53... Hole on brake frame,
54...Slide key, 55...Switching stand, 56...Rail support part, 57...Keyway, 58...Auxiliary guide plate, 59...Screw hole, 60...Protrusion on rail, 6
1...Protective wall, P...Switch.

Claims (1)

[Scope of Claims] 1. A brake frame equipped with a brake part that can contact the front and back surfaces of the rail is rotatably attached to the frame body at the sleeve part of the frame body equipped with slide keys protruding from both sides. By means of the connected brake frame holding spring and the positioning stopper for the brake frame which is projected inwardly from the sleeve portion by a spring, the brake part of the brake frame can be held at a position where braking is possible, wrapping around the front and back surfaces of the rail, The safety device is configured such that the braking part can be fixed in a non-braking position above the rail surface by engagement of a positioning stopper and a hole provided in the braking frame, and rollers are attached to the frame body so that the rail can be moved. a switch, a switch having a lifting rail and a horizontal rail that engage with the safety switch, a rail piece for changing the direction of the safety switch from a lift position to a horizontal position or vice versa; and a switch proximate to the switch. On the horizontal rail, a notch is provided in the sliding surface of the rail in the longitudinal direction, and an auxiliary guide plate with a keyway is fixed on both sides of the notch, and a switching table is installed on the lower side of the lifting rail. A safety device for both lifting and horizontal movement, characterized in that a protrusion on the rail in front of the switching table when viewed from above is provided with a protrusion on the rail that engages with a braking part of the safety device when the safety device is in a non-braking position. 2. A device for both lifting and horizontal movement according to claim 1, characterized in that the protrusion on the rail for the brake part of the safety device is provided on the surface of the horizontal rail between the switch and the switching table. Safety device. 3. The safety device for lifting and lowering and horizontal movement according to claim 1, characterized in that the switch is provided with a protective wall to prevent the safety device from coming off.