JP2532071Y2 - Safety equipment for fall prevention - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is mainly used in high-altitude work to prevent workers from falling by connecting workers with a parent net stretched over structural steel frames or temporary scaffolding columns. More particularly, the present invention relates to a safety device including a reel device.

(Prior art) Conventionally, use of safety gear has been obligatory in order to prevent fall of high-altitude workers and to ensure safety. Conventionally, such safety gear is a lumbar band wrapped around a worker's waist or the like. And a rope having a diameter of about 10 mm braided with synthetic fibers such as nylon and Tevilon (registered trademark) attached thereto.

However, in such safety gear, the rope is always hung on the waist, so when not in use, hang it on your shoulder,
It had to be wound around the waist with an appropriate size, which hindered walking and moving. In addition, when the above-mentioned conventional safety device falls during use, the safety device falls a full length of the rope, so that when the safety device is stopped, a large impact load is applied, and it is inevitable that the safety device is affected.

Therefore, as an improvement of such a safety device, a take-up rope or a belt take-up reel with a hook attached to the tip is built in the case, and a belt pass for inserting a safety belt is provided in the case. A portable safety device of a type that pulls out a retaining rope or belt and wraps the retaining rope, etc. around the take-up reel when not in use was developed.
No. 879, JP-B-54-33078, JP-B-55-9228, JP-A-48-2199, JP-A-60-2550,
Many proposals have been made in Japanese Utility Model Application Laid-Open No. 61-10757, Japanese Utility Model Application Laid-Open No. 61-51845, Japanese Patent Application Laid-Open No. 62-74377, and the like.

However, all of them are almost automated when pulling out the anchor rope or belt, but have the inconvenience of manually operating and winding up when not in use. .

On the other hand, in the above-mentioned reel system, weight reduction, miniaturization and guarantee of strength are required as important elements.

Correspondingly, the point where the trunk belt, that is, the safety belt and the fixing belt are connected, becomes the maximum point, but this point has not been considered so far.

In addition, virtually no consideration has been given to the impact mitigation in the event of a crash during use.

On the other hand, a safety device provided with a means for locking the pull-out of the anchoring belt when a belt pull-out speed equal to or higher than a predetermined value is detected in response to the impact at that time is disclosed in Japanese Utility Model Laid-Open No. 61-51845.

However, this has hardly solved the tendency to tighten during use.

(Problems to be solved by the present invention) The present invention is based on the actual situation as described above, and aims to provide a safer, lighter, smaller, and safer safety device that is easier to handle, By reducing the width of the locking belt and finding out the mechanism for pulling out and winding in, especially the mechanism of the connection between the locking belt and the trunk belt (safety belt), automatic pulling out and automatic winding up by simple operation, and The purpose is to achieve strength.

(Means for Solving the Problems) That is, the feature of the present invention that meets the above-mentioned object is that the belt take-up reel and the fixing belt as described above are built in the case, and the belt is guided to the guide hole of the case. A safety device for fall prevention, comprising a locking belt device which can be pulled out and wound freely and a safety belt for wearing the belt device on the body, firstly, the locking belt is a relatively narrow width of 8 to 25 mm. In order to strengthen the connecting portion between the belt and the safety belt, a D-ring body formed by winding and bonding a thread around the outer periphery of a synthetic resin D-ring reel is fitted into the belt guide hole of the case. That a ratchet wheel and a clutch plate partially having teeth higher than the ratchet wheel are provided on the outside of the side wall of the take-up reel; The Pin is provided a control elongated hole in the casing, fitted in the elongated hole,
The clutch plate is rotatable in the hole range of the elongated hole, a pawl with a handle is arranged near the outer periphery of the ratchet wheel and the clutch plate, and the pawl is moved with respect to the ratchet wheel in the locking belt withdrawing direction. Allows free rotation of the ratchet wheel but prevents the rotation in the winding direction, and when the pawl engages the teeth of the clutch plate,
The point is that the pawl and the ratchet wheel are disengaged from each other and are allowed to rotate freely again.

Here, the anchoring belt may be a narrow belt of a predetermined length, but high-strength aramid fiber is used as the core, and the outer periphery is used to prevent the core from becoming abrasion-resistant. Outer sheath made of synthetic fibers such as nylon and polyester, and vegetable fibers such as hemp and cotton, in order to require replacement as a signal, that is, not to indicate the life number, and to prevent the core from being strongly degraded by ultraviolet rays. It is preferable to use a narrow-width double-woven abrasion-resistant and weather-resistant belt formed of a body.

Further, the anchoring belt is formed by using an energy absorbing belt provided with a bent stitching portion that breaks at a part of the belt length at a predetermined impact or more and reduces impact energy, or a thread having a difference in strength. Break the yarn sequentially according to the degree of impact,
It is more effective to use a belt or the like provided with a structure capable of sequentially absorbing and relaxing the impact energy.

Further, the shock absorption is not limited to the above, and it is also possible to apply the shock absorption to the shaft through-hole of the case. By providing one or more spare holes connected to each other by a connection portion that can be exploded by a predetermined impact or more. It is one aspect that it is also preferable to keep it.

(Operation) When using the safety device having the above configuration, the safety belt is used to attach the anchoring belt device to the body, and the user starts working.

When pulling out the locking belt, the ratchet wheel rotates freely, the take-up reel rotates in the pulling-out direction, and the locking belt is pulled out freely.

When the length of the locking belt reaches the specified length and the pull-out of the locking belt is stopped and loosened, the ratchet wheel is rotated by the bias of the spring in the winding direction, the pawl is locked at the free point of the ratchet wheel teeth, and the ratchet wheel is wound. The rotation to the side is prevented, and the locking belt is locked.

Therefore, when a hook is provided at the end of the belt, the hook is hooked at a predetermined location to start work at a high place.

Then, at the time of non-use, when the locking belt is to be stored in the case, if the belt is loosened while pushing the handle of the pawl, the ratchet wheel rotates in the winding direction by the spring.

At this time, since the clutch plate is constantly pressed in the direction of the ratchet wheel by a light force, the clutch plate makes the same rotation due to the friction, and the predetermined point bites below the pawl.

Since the predetermined point is higher than the height of the ratchet wheel teeth, the ratchet wheel and the pawl are disengaged, and the locking belt is automatically wound on the take-up reel.

When the locking belt is pulled out again, the clutch plate is disengaged due to the friction and rotates, so that when the belt is loosened, the pawl is in a free operating state and can be pulled out freely.

Even if the case may be damaged, in this case, the case and the shaft are hooked on the D-ring on which the yarn is wound, and the case and the shaft are firmly connected to the safety belt to achieve the safety purpose.

Further, when the narrow belt is double-woven, replacement can be known at any time depending on the state of wear of the skin fibers.

In this way, even when working at high places, the locking belt can be easily pulled out and wound by simple one-handed work, and the operation can be performed with a highly safe operation.

(Example) Hereinafter, with reference to an accompanying drawing, an example of a safety device of the present invention is described.

FIG. 1 is a perspective view showing an example of the safety device according to the present invention, FIG. 2 is an exploded perspective view thereof, FIG. 3 is a cross-sectional view of the same main part, FIG. FIG. 5 is a left side view.

In these figures, (3) and (3) 'are a pair of side wall members which are fitted to each other to form a case, and a winding shaft (1) is inserted into a substantially central portion of one of the side wall members (3). When the case is constituted by providing a shaft hole (2), the shaft (1) is attached across both side wall members (3) and (3) ′, and a locking belt (B) is wound around the shaft (1). The take-up reel (4) is mounted by a rivet (4) 'and is incorporated therein to form a locking belt device (R).

The take-up reel (4) is integrally provided with a ratchet wheel (5) on the outer side wall thereof, and further has teeth higher than the teeth of the ratchet wheel (5) on at least a part of the outer periphery on the outer side thereof. A clutch plate (6) having a protruding stopper pin (6a) is additionally provided, and a pressing spring (6) '
The clutch plate (6) is pressed toward the ratchet wheel (5) by interposing the clutch plate (6) with the case side wall member (3).

One end of the winding shaft (1) protrudes outside the side wall member (3) from the shaft hole (2), and a spiral spring (8) is urged in the belt winding direction.
Is attached and the cover (9) is rivet etc. (10), (10)
Is inserted and fixed in the holes (11) and (11) ′.

On the other hand, a stopper pin (6a) of the clutch plate (6) is inserted into one of the side wall members (3) of the case composed of the pair of side wall members (3) and (3) 'to control the rotation range. And a modified hole (12) for inserting a pawl (14) with a handle (13) to be described later through both side wall members (3) and (3) '. 12) 'is provided and rivets (17),
(17) 'is fixed to the holes (18), (18)', (19) and (19) ', and the rivets (20) and (20)' are holes (21) and (21).
′, (22), (22) ′, and rivets (23),
(23) 'is fastened to the holes (24) and (24)', and the rivet (32) is fastened to the holes (33) and (34) to form a case. Abuts a plate (27) having a tube (26) forming a guide hole (25) for pulling out a rivet (28), (28) ′ through holes (29), (29) ′, (30), (30) ', (30a), (30
a) and (30a) 'are formed in the locking belt withdrawal portion by fastening and fixing.

A belt having both side flanges (35a) and (35b) formed of a synthetic resin around the periphery of the guide hole (25) of the belt drawer.
D-ring (35) provided with a yarn winding portion (36) formed by winding a high-strength yarn around the outer periphery of a ring reel and fixing it with an adhesive or the like
Is attached by fitting the window hole (37) to the tube portion (26), and further has an insertion hole (38) 'for inserting the safety belt (A).

A pawl spring (15) is attached to the pawl (14) by a rivet (16), and the ratchet wheel (5) and the clutch plate (6) are formed inside the modified holes (12) and (12) 'in the case. It is arranged elastically close to the outer periphery and does not prevent the rotation of the ratchet wheel (5) in the pull-out direction of the locking belt (B), but engages with the teeth in the rotation in the winding direction. The pawl (14) engages with teeth on the outer periphery of the clutch plate (6) when the pawl (14) is engaged with the teeth on the ratchet wheel (5) due to the difference in tooth height. Is disengaged, and the ratchet wheel (5) is allowed to freely rotate in the winding direction.

In the drawing, (B) is a locking belt that is drawn out and wound on the take-up reel (4) of the above-described device.
A hook (39) is attached to the tip of the double-woven belt of the outer wall sheath body of abrasion-resistant fiber such as the aramid fiber core body, synthetic fiber or the like having a width of about 25 mm. An energy-absorbing structure, for example, a bent overlapped sewn portion (40) sewn (41) with easily breakable thread is formed in a part or the entire length of the belt according to the drawing.

This is not limited to one side as shown in FIG. 6 (a) or (d), but may be formed as double-sided sewn portions (40), (40) ′ as shown in FIG. 6 (e). It is also possible to use different yarns to absorb energy by breaking them, or to provide other appropriate impact energy absorbing structures. (42) indicates a protector, and (43) indicates a temporary fixing.

(A) is a safety belt for mounting a series of locking belt devices including the above-described locking belt (B) on the body, and has a buckle (C) and one side wall member of the case ( 3) 'is hung by a belt loop (31) formed by the belt, and is inserted into and held by the insertion hole (38).

Therefore, when the above-mentioned parts are assembled to form a fastening belt device, and this is worn on the body with a safety belt and engaged in work, first, when pulling out the fastening belt (B), the ratchet wheel (5) is used. Rotates together with the take-up reel (4) in the direction of the solid line shown in FIG. 4, and the pawl (14) is in a free operating state, and the belt (B) is appropriately opposed to the bias of the spring (8). Drawn out.

Then, when the belt (B) is pulled out for a predetermined length, the belt pulling out is stopped and loosened to release the ratchet wheel (5).
Is rotated in the winding direction by the bias of the winding spring (8). At this time, the pawl (14) is engaged with the teeth of the ratchet wheel (5) (the state shown in FIG. 4), the rotation of the ratchet wheel (5) in the winding direction is prevented, and the belt winding is stopped.

Next, when the locking belt (B) is wound around the take-up reel in the direction shown by the dotted line in FIG. 4 when not in use, the belt is loosened while pushing the pawl handle (13) in the direction shown by the arrow in FIG. Then, the ratchet wheel (5) is disengaged and rotates in the winding direction by the urging force of the spring.

However, in order to continue the rotation in the winding direction, it is necessary to keep pushing the pawl handle.

Then, the clutch plate (6) is activated to guarantee this.

That is, since the clutch plate (6) is constantly pushed in the direction of the ratchet wheel (5) with a light force by the pressing spring (6) ', the clutch plate (6) rotates simultaneously with the ratchet wheel (5) due to the friction and rotates. The cutting edge (point) bites under the pawl (14). At this time, since the point is higher than the height of the teeth of the ratchet wheel (5), the pawl (14) remains engaged with the point, and is in a free state with the ratchet wheel (5) to freely move the wheel (5). By rotating, the locking belt (B) is continuously wound. At this time, clutch plate (6)
The stopper pin (6a) is the control hole (7) in FIG.
Located at the top end of.

Then, when the locking belt is pulled out again, the clutch plate (6) rotates by friction to the position shown in FIG. 4 together with the rotation of the ratchet wheel (5), and when the belt is loosened, the pawl is freely operated. The anchoring belt can be pulled out as appropriate.

Thus, of course, the locking belt can be easily pulled out,
Even when the belt is wrapped around, the entire belt can be wrapped up just by pressing the pawl handle only at the time of initial wrapping, and the operation becomes extremely simple.

FIG. 6 shows a mode of absorption and a modification of the absorbing structure in the case where an energy absorbing structure is provided in a part of the anchoring belt (B) in the above-mentioned safety device. When it is received, the easily breakable thread (41) of the fold-over seam (40), (40) 'is broken by the impact and stretched as shown in FIG. To relax.

Although not shown, an absorbing effect can be imparted to the side wall member constituting the case as an energy absorbing structure.

That is, the shaft hole (2) is provided with one or a plurality of spare holes which are connected to each other through a connecting portion which is easily damaged and explodes by a shock of a predetermined degree or more in the side wall member (3). When a sudden impact is applied to the safety device, such as when the vehicle falls, the side wall member (3) is damaged and the impact energy is absorbed, so that the safety of the worker can be secured.

In addition, it goes without saying that pulling out and winding in the locking belt are the same as described above.

(Effects of the Invention) In the present invention, as described above, the fixing belt is drawn out from the take-up reel in the case like a tape measure and then wound in, so that the fixing belt can be easily pulled out and wound. In addition, the use of a narrow belt of 8 to 25 mm as a fastening belt makes it smaller and more compact and easier to use.
In addition, the present invention provides a simple and safe fall prevention device which has no hanging parts even when not in use or when the scaffold is moved, and does not become a hindrance as compared with the conventional one and is not likely to be caught by any other object. be able to.

In particular, the safety device of the present invention has a mechanism in which a take-up reel is provided with a ratchet wheel and a clutch plate partially having teeth higher than the teeth of the ratchet wheel, and a mechanism for causing the two to cooperate with each other. , When the belt wraps around,
It is not necessary to continuously operate the operation rods such as the rotation stop rod manually continuously as in the conventional case, and it is possible to wind all the locking belts only by holding down the pawl handle only at the initial winding, so that the locking belt The winding operation becomes extremely simple, and the operability can be remarkably improved.

In addition, since a protruding stopper pin is provided on the clutch plate and is inserted into the control long hole of the side wall member, it is easy to appropriately control the rotation range of the clutch plate.

Moreover, in the present invention, a D-ring body combining a synthetic resin D-ring reel with a winding part of high-strength yarn is attached to the drawer side of the locking belt, so that even if the case is broken, The case is hooked on the ring, and the strength of the part connecting the safety belt and the anchoring belt is maintained, so that the safety can be further improved and these D-rings are made of synthetic resin and thread. It is formed and extremely lightweight, and is extremely useful as a reel-type safety device as well as light weight due to the use of aluminum alloy such as a case.

In addition, the double-woven belt of the outer wall sheath body such as the aramid fiber core body and the synthetic fiber according to claim 2 can be replaced at any time according to the wear state of the sheath fiber as well as the wear resistance and weather resistance. The invention according to claim 3 is effective, and the invention according to claim 3 reduces the impact on the human body due to energy absorption. The invention according to claim 4 further damages the side wall member when working at a high place and a sudden impact is applied to the safety equipment. This has the effect of absorbing more energy and ensuring worker safety.

Thus, the safety device according to the present invention enhances the usability of the safety device for workers at high places due to the above effects,
A remarkable effect of improving work safety is expected.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an example of a safety device according to the present invention,
FIG. 2 is a cross-sectional view of a main part at the time of assembling the safety device, FIG. 3 is a longitudinal sectional view of a main part at the time of the assembling, FIG. 4 is a right side view at the time of assembling the case in FIG. FIG. 6 is a perspective view showing another embodiment of the side wall member. (A) Safety belt, (B) Tether belt, (1)
...... winding shaft, (2) ... shaft hole, (3),
(3) 'side wall member, (4) ... take-up reel, (5) ...
Ratchet wheel, (6) ... clutch plate, (6
a) Stopper pin, (7) Slot for control,
(8) ... Spring, (13) ... Paul handle,
(14) ... Paul, (25) ... Belt guide hole, (35) ...
… D ring, (36)… Thread winding part, (40)…
Bent polymerized sewing part.

Claims (4)

(57) [Scope of request for utility model registration] A base end portion is fixed to a shaft of a belt take-up reel incorporated in a case, and the other end includes a locking belt drawn out through a guide hole of the case, and is connected to one end of the shaft. A locking belt device, which is equipped with a spring biased in the belt winding direction, pulls out the belt through the guide hole of the case, and is capable of being wound freely, and a safety belt for mounting the locking belt device on the body. In the safety device for fall prevention, the fixing belt is a narrow belt of 8 to 25 mm, and a synthetic resin D is formed in the belt guide hole of the case.
A D-ring body formed by winding and fixing the yarn to the outer periphery of the ring reel is attached, a ratchet wheel is provided on the side wall of the take-up reel, and a clutch plate having teeth higher than the ratchet wheel is provided on the outside thereof. The clutch plate is pressed against the ratchet wheel, and the stopper pin of the clutch plate is inserted into the control long hole provided in the case to allow the clutch plate to rotate within the hole range. A pawl with a handle is fastened to the ratchet wheel near the outer periphery. The ratchet wheel allows free rotation of the ratchet wheel in the pull-out direction, but prevents the rotation in the winding direction, and the pawl has teeth on the clutch plate. When the pawl and the ratchet wheel are disengaged in the winding direction when they are engaged with each other, they are elastically arranged to allow free rotation. Fall protection safety device according to claim. 2. A double-woven abrasion-resistant and weather-resistant belt in which the narrow belt has an aramid fiber as a core and an outer wall sheath made of synthetic fiber, vegetable fiber or the like is woven around the outer periphery. Safety equipment to prevent crash. 3. The fall protection safety device according to claim 1, wherein the anchoring belt is an energy absorbing belt having a portion for absorbing energy when a predetermined or more impact is applied to at least a part thereof in a longitudinal direction thereof. 4. The safety device according to claim 1, wherein the shaft through-hole of the case is provided with one or more spare holes connected by a connecting portion which can be exploded by a predetermined impact or more. Utensils.