CA2638490A1 - Scaffolding safety device - Google Patents
Scaffolding safety device Download PDFInfo
- Publication number
- CA2638490A1 CA2638490A1 CA002638490A CA2638490A CA2638490A1 CA 2638490 A1 CA2638490 A1 CA 2638490A1 CA 002638490 A CA002638490 A CA 002638490A CA 2638490 A CA2638490 A CA 2638490A CA 2638490 A1 CA2638490 A1 CA 2638490A1
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- Prior art keywords
- safety device
- fasteners
- scaffolding
- pole
- cable
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- 238000004873 anchoring Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 9
- 238000010276 construction Methods 0.000 description 6
- 230000002265 prevention Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B35/00—Safety belts or body harnesses; Similar equipment for limiting displacement of the human body, especially in case of sudden changes of motion
- A62B35/0043—Lifelines, lanyards, and anchors therefore
- A62B35/0068—Anchors
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G5/00—Component parts or accessories for scaffolds
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/001—Safety or protective measures against falling down relating to scaffoldings
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Emergency Lowering Means (AREA)
Abstract
A scaffolding safety device comprising: a longitudinal bar having at least two spaced-apart safety device fasteners, each of the safety device fasteners being engageable with a vertical scaffold element, and a cable attachment member mounted to the longitudinal bar for fastening a securing cable thereto.
Description
SCAFFOLDING SAFETY DEVICE
Field of the Invention The invention relates to a safety device, such as it can be applied during mounting works, and more particularly when mounting scaffolds, on one hand, and when working on such scaffolds, on the other hand. Moreover, the safety device can be used to connect guy wires to stabilize erected scaffolds.
Description of the Prior Art Scaffolds, such as tubular scaffolds, are built up by attaching horizontal tubes between vertical tubes, by means of clamping parts, by sliding into each other or such in order to obtain, together with the application of so-called cross connections, a solid construction upon which one can work in order to erect other constructions, buildings or other elements, and/or to work on said constructions etc., for example, during renovations, repair works etc.
At different heights of such scaffold construction, subsequently working floors are provided on which the scaffold workers and/or the workers working at or on such construction can move.
During the erection of such scaffolds as well as during the use of such scaffolds for erecting, cleaning, repairing etc. adjacent constructions, the scaffold mounting staff and/or workers are obliged to connect themselves to the scaffold by means of a safety harness with a safety line in order to limit, in the case of a fall, such fall to the length of the safety line.
To this aim, the safety harness which encases the worker is fastened to a scaffold element by means of a safety line with a length of, for example, 1 meter, and possibly by means of a hook or the like.
OR File No. 19013-2CA - 1-Moreover, often the erected scaffold structure must be stabilized with tensioned cable attached at one end to the scaffold structure and anchored at the opposite end to the ground at a distance from the scaffold structure base.
However, the scaffold element to which the safety line or the tensioned cable are attached are often limited by their load capacity.
BRIEF SUMMARY OF THE INVENTION
It is therefore an aim of the present invention to address the above mentioned issues.
According to a general aspect, there is provided a scaffolding safety device comprising:
a longitudinal bar having at least two spaced-apart safety device fasteners, each of the safety device fasteners being engageable with a vertical scaffold element, and a cable attachment member mounted to the longitudinal bar for fastening a securing cable thereto.
According to another general aspect, there is provided a scaffolding safety device in combination with a scaffold having at least one vertical scaffolding pole, at least one of the vertical scaffolding pole having at least two pole anchoring elements spaced-apart from one another, the scaffolding safety device comprising a longitudinal bar having at least two spaced-apart fasteners and a cable attachment member mounted to the longitudinal bar for fastening a securing cable thereto, each of the spaced-apart fasteners being securable to a respective one of the at least two pole anchoring elements for securing the longitudinal bar to one of the at least one vertical scaffolding pole.
According to still another general aspect, there is provided a method for securing a security cable to a scaffold having at least one vertical scaffolding pole, the method comprising: securing at least two spaced-apart safety device fasteners of a scaffolding safety device with one of the at least one vertical scaffolding pole; and fastening the security cable with a cable attachment member mounted to a longitudinal bar extending between the two spaced-apart joint fasteners.
OR File No. 19013-2CA - 2-According to a further general aspect, there is provided a scaffolding safety device in combination with a scaffold having at least one vertical scaffolding pole, the scaffolding safety device comprising a longitudinal bar having at least two spaced-apart safety device fasteners and a cable attachment member mounted to the longitudinal bar for fastening a securing cable thereto, the spaced-apart safety device fasteners being securable to one of the vertical scaffolding poles.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. I is a perspective view of a scaffold including four scaffolding safety devices in accordance with an embodiment, wherein a safety line is fastened to one of the scaffolding safety devices;
Fig. 2 is a perspective view of one of the safety devices shown in Fig. 1;
Fig. 3 is a side elevation view of one of the safety devices shown in Fig. 1 wherein a eyelet is dismounted from a longitudinal bar and the wedges of flange fasteners are slid out of connector passages;
Fig. 4 is a perspective view of one of the safety devices shown in Fig. 1 mounted to spaced-apart scaffold flanges;
Fig. 5 is a perspective view of a scaffold including four scaffolding safety devices in accordance with an embodiment, wherein tensioned cables have one end fastened to a respective one of the safety devices and an opposite end anchored to the ground at a distance from the scaffold base; and Fig. 6 is a front elevation view of a scaffold having safety devices mounted thereto in accordance with another embodiment, wherein tensioned cables have one end fastened to a respective one of the safety devices and an opposite end anchored to a concrete block at a distance from the scaffold base; Fig. 6a is an enlarged view of one of the safety devices mounted to a vertical scaffold element of the scaffold and having one end of one of the tensioned cables fastened thereto.
OR File No. 19013-2CA - 3-It will be noted that throughout the appended drawings, like features are identified by like reference numerals.
DETAILED DESCRIPTION
Referring now to the drawings and, more particularly, referring to FIG. 1, an upper section of a scaffold 10 is represented which, according to an embodiment, is constructed of a number of tubular vertical scaffold elements 12, or vertical scaffold poles, and tubular horizontal scaffold elements 14, or horizontal scaffold poles, of which some vertical scaffold elements 12 are connected to each other by means of cross connections 16, and on which, at certain heights, boards 18 are provided which form a working floor 20.
In this case, the working floor 20 is bordered by a number of additional horizontal scaffold elements 14 which together form a balustrade 22.
As usual in scaffolding, the vertical scaffold elements 12, at certain levels, are provided with scaffolding pole joints or pole anchoring elements, such as ring-shaped flanges 24, which are fixed at the vertical scaffold elements 12 at suitable mutual interspaces. As best seen in Fig. 4, the flanges 12 have upper and lower planar faces and are formed with several openings 26 that extend between the flange faces.
For securing a scaffolding safety device 30 to at least two flanges 24, as it will be described in more details below, the openings 26 of the flanges 24 are preferably aligned with one another.
The horizontal scaffold elements 14 and the cross connections 16 can be anchored in a known manner in the openings 26 of these flanges 24, by means of complementary fixation means at the extremities of these scaffold elements 14 and cross connections 16. For instance and without being limitative, the ring-shaped flanges 24 can be welded directly to the vertical scaffold elements 12 or to an extruded mounting sleeve (not shown) and the sleeve and flange assembly is then welded to the vertical scaffold elements 12 with the flange 24 in a substantially horizontal orientation.
OR File No. 19013-2CA - 4-Safety devices 30 are securable to the vertical scaffold elements 12, as it will be described in more details below. A securing cable 36, such as a safety line or a guy wire, can be secured to the safety device 30 for either securing a worker 37 to the scaffold 10 (Fig. 1) or the scaffold 10 to the ground (Fig. 5) or to another element such as a concrete block (Fig. 6).
Referring now to Figs. 2 to 4, there is shown that the safety device 30 includes a longitudinal rod 42, or bar, extending substantially vertically, parallel to the vertical scaffold element 12 to which it is mounted.
Approximately in the middle of the longitudinal rod 42, an eyelet 44 is mounted to the rod 42 in order to allow the fastening of the securing cable 36 in a simple manner. It is appreciated that in an alternative embodiment, the eyelet 44 can be replaced by any appropriate cable attachment member. In an embodiment, the eyelet 44 has a head 60, defining an attachment hole 62, and a threaded shank 64, which extends from the bottom surface of the eyelet head 60. The eyelet shank 64 is inserted into a channel 66 preformed in the rod 42 to affix the eyelet 44 to the rod 42 and fastened thereto with a combination of a washer 68 and an internally threaded nut 70. It is appreciated that, in alternative embodiments, the eyelet 44 can be welded to rod 42 or secured thereto by any other appropriate means.
The length of the longitudinal rod 42 can be similar or longer than the core distance of the two flanges 24 to which the safety device 30 is mounted.
A joint fastener and, in the embodiment shown, a flange fastener 46, is mounted proximate to each end of the longitudinal rod 42. The flange fastener 46 is engageable with a respective flange 24 of the vertical scaffold element 12. The distance between both joint fasteners 46 corresponds to the distance between two flanges 24 to which the safety device 30 is secured. It is appreciated that the flanges 24 to which the safety device 30 is mounted can be consecutive or non-consecutive flanges 24 on the vertical scaffold element 12. The distance between two consecutive joint fasteners can range OR File No. 19013-2CA - 5-between 200 mm and 800 mm, in a particular embodiment, it can range between and 600 mm, and, in another embodiment, the distance is approximately 500 mm.
Referring to Fig. 4, there is shown that the flange fastener 46 includes a connector 48 secured to the longitudinal rod 42 of the safety device 30. In an embodiment the connector 48 is welded to the longitudinal rod 42. The connector 48 includes two spaced apart members 49 defining therebetween a spacing in which a section of flange 24 is insertable.
A vertical passage 50 extends fully through the two connector members 49. The vertical passages 50 of both spaced-apart connector members 49 are aligned. The connector 48 also includes a wedge 52 loosely insertable in the vertical passage 50. The wedge 52 tapers from top to bottom in overall configuration. For securing the scaffolding safety device 30 to a flange 24, the wedge 52 is slid upwardly in the vertical passage 50, the flange 24 is inserted between two adjacent connector members 49, the vertical passage 50 of the connector 48 is aligned with one of the flange openings 26 for receipt of the wedge 52, and the wedge 52 is slid downwardly in the vertical passage 50 and engages the flange opening 26. In an embodiment both the passage 50 and flange opening are dimensioned to relatively loosely receive the wedge 52.
The use of the safety device is relatively simple and as follows. When erecting a scaffold, the safety device is mounted to selected vertical scaffold elements by inserting the wedges in the openings of the flanges, as detailed above, with the wedges being directed downward. In an embodiment, the flanges protrude above a working floor.
Thus, the eyelet is at a certain height in respect to the working floor, and usually above the waist of a worker.
As the worker arrives on the working floor in order to perform works at that location, he fastens the safety line, or tether, of his safety harness to the eyelet of the safety device, such that he is secured from that moment on, and, with a possible fall, his falling distance will be limited by the length of the safety line.
OR File No. 19013-2CA - 6-In an alternative embodiment, at least two safety devices can be used while erecting a scaffold or performing a work thereon. The safety devices are mounted to selected vertical scaffold elements and the workers fasten safety lines to the safety devices.
When moving upwardly while erecting the scaffold or performing a work thereon, the worker can disengage one of the safety lines from one of the safety devices and then disengage the safety device from the flanges, while remaining fasten to at least another one of the safety devices through another safety line. Then, the worker can mount the disengaged safety device to other flanges located at a different location and fasten one of his safety lines to the repositioned safety device. The same operation can be performed several times while erecting the scaffold or performing a work thereon. A
possible fall of the worker is always limited by the length of the safety lines since he is always fasten to at least one safety device.
Alternatively, as shown in Fig. 5, the safety device can be used to fasten guy wire 56 for anchoring the scaffold 10 to the ground. More particularly, a first end of a guy wire is secured to the cable attachment member and an opposite end is anchored to the ground, at a certain distance from the scaffold base.
In an alternative embodiment shown in Fig. 6, the safety device can be used to fasten guy wires 56 for anchoring the scaffold 10 to concrete blocks 60 or any other anchoring element. In Fig. 6, the safety devices are mounted outwardly of the inner cage defined by the scaffold elements.
As a consequence, when using the safety device, the level of falling prevention is much higher than with the classical way of falling prevention since the load is transferred from the safety device to two spaced-apart flanges. For instance and without being limitative, in an embodiment, the safety device can support more than 4050 lb load comparatively to 2500 lb load for prior art safety devices which are mounted at a single location, i.e.
they are attached to a single scaffold member, and which does not distribute the load.
In a particular form of embodiment of the invention, for example, the accidental lifting of the flange fasteners out of the openings of the flanges might be prevented by providing OR File No. 19013-2CA - 7-an additional safety system, for example, by providing, in one of the wedges, a transverse bore opening in which a removable safety pin, a padlock or such might be provided.
The safety device 30 can be formed of aluminum or steel alloys for instance.
It can have a length ranging between 10 and 25 inches and, in an alternative embodiment, between and 23 inches.
In an alternative embodiment, the scaffolding pole joint can differ from the ring-shaped flanges 24 described above. For instance and without being limitative, it can be any member allowing to secure the safety device 30 to the vertical scaffold elements 12.
10 Moreover, the safety device 30 can be mounted directly to any other elements mounted to the vertical scaffold elements 12. For instance and without being limitative, in tube and clamp scaffolding, it can be mounted to scaffold clamp or other element mounted to the vertical scaffold element.
The shape of the joint fastener can vary in accordance with the members to which the 15 safety device is fastened.
It is appreciated that the safety device can include more than two safety device fasteners such as joint fasteners, each being securable to a respective scaffold member. Moreover, the safety device is not necessarily secured to scaffold joints but can be secured directly to vertical scaffold elements 12 or other scaffold components.
The safety device can be used with several types of scaffolds which do not necessarily include tubular scaffold elements 12, 14.
The embodiments of the invention described above are intended to be exemplary only.
For example and without being limitative, the shape of the eyelet can differ from the one shown in the above described embodiments. Moreover, the eyelet can be mounted anywhere along the longitudinal rod. The shape of the longitudinal rod 42 can differ from the one shown. The scope of the invention is therefore intended to be limited solely by the scope of the appended claims.
OR File No. 19013-2CA - 8-
Field of the Invention The invention relates to a safety device, such as it can be applied during mounting works, and more particularly when mounting scaffolds, on one hand, and when working on such scaffolds, on the other hand. Moreover, the safety device can be used to connect guy wires to stabilize erected scaffolds.
Description of the Prior Art Scaffolds, such as tubular scaffolds, are built up by attaching horizontal tubes between vertical tubes, by means of clamping parts, by sliding into each other or such in order to obtain, together with the application of so-called cross connections, a solid construction upon which one can work in order to erect other constructions, buildings or other elements, and/or to work on said constructions etc., for example, during renovations, repair works etc.
At different heights of such scaffold construction, subsequently working floors are provided on which the scaffold workers and/or the workers working at or on such construction can move.
During the erection of such scaffolds as well as during the use of such scaffolds for erecting, cleaning, repairing etc. adjacent constructions, the scaffold mounting staff and/or workers are obliged to connect themselves to the scaffold by means of a safety harness with a safety line in order to limit, in the case of a fall, such fall to the length of the safety line.
To this aim, the safety harness which encases the worker is fastened to a scaffold element by means of a safety line with a length of, for example, 1 meter, and possibly by means of a hook or the like.
OR File No. 19013-2CA - 1-Moreover, often the erected scaffold structure must be stabilized with tensioned cable attached at one end to the scaffold structure and anchored at the opposite end to the ground at a distance from the scaffold structure base.
However, the scaffold element to which the safety line or the tensioned cable are attached are often limited by their load capacity.
BRIEF SUMMARY OF THE INVENTION
It is therefore an aim of the present invention to address the above mentioned issues.
According to a general aspect, there is provided a scaffolding safety device comprising:
a longitudinal bar having at least two spaced-apart safety device fasteners, each of the safety device fasteners being engageable with a vertical scaffold element, and a cable attachment member mounted to the longitudinal bar for fastening a securing cable thereto.
According to another general aspect, there is provided a scaffolding safety device in combination with a scaffold having at least one vertical scaffolding pole, at least one of the vertical scaffolding pole having at least two pole anchoring elements spaced-apart from one another, the scaffolding safety device comprising a longitudinal bar having at least two spaced-apart fasteners and a cable attachment member mounted to the longitudinal bar for fastening a securing cable thereto, each of the spaced-apart fasteners being securable to a respective one of the at least two pole anchoring elements for securing the longitudinal bar to one of the at least one vertical scaffolding pole.
According to still another general aspect, there is provided a method for securing a security cable to a scaffold having at least one vertical scaffolding pole, the method comprising: securing at least two spaced-apart safety device fasteners of a scaffolding safety device with one of the at least one vertical scaffolding pole; and fastening the security cable with a cable attachment member mounted to a longitudinal bar extending between the two spaced-apart joint fasteners.
OR File No. 19013-2CA - 2-According to a further general aspect, there is provided a scaffolding safety device in combination with a scaffold having at least one vertical scaffolding pole, the scaffolding safety device comprising a longitudinal bar having at least two spaced-apart safety device fasteners and a cable attachment member mounted to the longitudinal bar for fastening a securing cable thereto, the spaced-apart safety device fasteners being securable to one of the vertical scaffolding poles.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. I is a perspective view of a scaffold including four scaffolding safety devices in accordance with an embodiment, wherein a safety line is fastened to one of the scaffolding safety devices;
Fig. 2 is a perspective view of one of the safety devices shown in Fig. 1;
Fig. 3 is a side elevation view of one of the safety devices shown in Fig. 1 wherein a eyelet is dismounted from a longitudinal bar and the wedges of flange fasteners are slid out of connector passages;
Fig. 4 is a perspective view of one of the safety devices shown in Fig. 1 mounted to spaced-apart scaffold flanges;
Fig. 5 is a perspective view of a scaffold including four scaffolding safety devices in accordance with an embodiment, wherein tensioned cables have one end fastened to a respective one of the safety devices and an opposite end anchored to the ground at a distance from the scaffold base; and Fig. 6 is a front elevation view of a scaffold having safety devices mounted thereto in accordance with another embodiment, wherein tensioned cables have one end fastened to a respective one of the safety devices and an opposite end anchored to a concrete block at a distance from the scaffold base; Fig. 6a is an enlarged view of one of the safety devices mounted to a vertical scaffold element of the scaffold and having one end of one of the tensioned cables fastened thereto.
OR File No. 19013-2CA - 3-It will be noted that throughout the appended drawings, like features are identified by like reference numerals.
DETAILED DESCRIPTION
Referring now to the drawings and, more particularly, referring to FIG. 1, an upper section of a scaffold 10 is represented which, according to an embodiment, is constructed of a number of tubular vertical scaffold elements 12, or vertical scaffold poles, and tubular horizontal scaffold elements 14, or horizontal scaffold poles, of which some vertical scaffold elements 12 are connected to each other by means of cross connections 16, and on which, at certain heights, boards 18 are provided which form a working floor 20.
In this case, the working floor 20 is bordered by a number of additional horizontal scaffold elements 14 which together form a balustrade 22.
As usual in scaffolding, the vertical scaffold elements 12, at certain levels, are provided with scaffolding pole joints or pole anchoring elements, such as ring-shaped flanges 24, which are fixed at the vertical scaffold elements 12 at suitable mutual interspaces. As best seen in Fig. 4, the flanges 12 have upper and lower planar faces and are formed with several openings 26 that extend between the flange faces.
For securing a scaffolding safety device 30 to at least two flanges 24, as it will be described in more details below, the openings 26 of the flanges 24 are preferably aligned with one another.
The horizontal scaffold elements 14 and the cross connections 16 can be anchored in a known manner in the openings 26 of these flanges 24, by means of complementary fixation means at the extremities of these scaffold elements 14 and cross connections 16. For instance and without being limitative, the ring-shaped flanges 24 can be welded directly to the vertical scaffold elements 12 or to an extruded mounting sleeve (not shown) and the sleeve and flange assembly is then welded to the vertical scaffold elements 12 with the flange 24 in a substantially horizontal orientation.
OR File No. 19013-2CA - 4-Safety devices 30 are securable to the vertical scaffold elements 12, as it will be described in more details below. A securing cable 36, such as a safety line or a guy wire, can be secured to the safety device 30 for either securing a worker 37 to the scaffold 10 (Fig. 1) or the scaffold 10 to the ground (Fig. 5) or to another element such as a concrete block (Fig. 6).
Referring now to Figs. 2 to 4, there is shown that the safety device 30 includes a longitudinal rod 42, or bar, extending substantially vertically, parallel to the vertical scaffold element 12 to which it is mounted.
Approximately in the middle of the longitudinal rod 42, an eyelet 44 is mounted to the rod 42 in order to allow the fastening of the securing cable 36 in a simple manner. It is appreciated that in an alternative embodiment, the eyelet 44 can be replaced by any appropriate cable attachment member. In an embodiment, the eyelet 44 has a head 60, defining an attachment hole 62, and a threaded shank 64, which extends from the bottom surface of the eyelet head 60. The eyelet shank 64 is inserted into a channel 66 preformed in the rod 42 to affix the eyelet 44 to the rod 42 and fastened thereto with a combination of a washer 68 and an internally threaded nut 70. It is appreciated that, in alternative embodiments, the eyelet 44 can be welded to rod 42 or secured thereto by any other appropriate means.
The length of the longitudinal rod 42 can be similar or longer than the core distance of the two flanges 24 to which the safety device 30 is mounted.
A joint fastener and, in the embodiment shown, a flange fastener 46, is mounted proximate to each end of the longitudinal rod 42. The flange fastener 46 is engageable with a respective flange 24 of the vertical scaffold element 12. The distance between both joint fasteners 46 corresponds to the distance between two flanges 24 to which the safety device 30 is secured. It is appreciated that the flanges 24 to which the safety device 30 is mounted can be consecutive or non-consecutive flanges 24 on the vertical scaffold element 12. The distance between two consecutive joint fasteners can range OR File No. 19013-2CA - 5-between 200 mm and 800 mm, in a particular embodiment, it can range between and 600 mm, and, in another embodiment, the distance is approximately 500 mm.
Referring to Fig. 4, there is shown that the flange fastener 46 includes a connector 48 secured to the longitudinal rod 42 of the safety device 30. In an embodiment the connector 48 is welded to the longitudinal rod 42. The connector 48 includes two spaced apart members 49 defining therebetween a spacing in which a section of flange 24 is insertable.
A vertical passage 50 extends fully through the two connector members 49. The vertical passages 50 of both spaced-apart connector members 49 are aligned. The connector 48 also includes a wedge 52 loosely insertable in the vertical passage 50. The wedge 52 tapers from top to bottom in overall configuration. For securing the scaffolding safety device 30 to a flange 24, the wedge 52 is slid upwardly in the vertical passage 50, the flange 24 is inserted between two adjacent connector members 49, the vertical passage 50 of the connector 48 is aligned with one of the flange openings 26 for receipt of the wedge 52, and the wedge 52 is slid downwardly in the vertical passage 50 and engages the flange opening 26. In an embodiment both the passage 50 and flange opening are dimensioned to relatively loosely receive the wedge 52.
The use of the safety device is relatively simple and as follows. When erecting a scaffold, the safety device is mounted to selected vertical scaffold elements by inserting the wedges in the openings of the flanges, as detailed above, with the wedges being directed downward. In an embodiment, the flanges protrude above a working floor.
Thus, the eyelet is at a certain height in respect to the working floor, and usually above the waist of a worker.
As the worker arrives on the working floor in order to perform works at that location, he fastens the safety line, or tether, of his safety harness to the eyelet of the safety device, such that he is secured from that moment on, and, with a possible fall, his falling distance will be limited by the length of the safety line.
OR File No. 19013-2CA - 6-In an alternative embodiment, at least two safety devices can be used while erecting a scaffold or performing a work thereon. The safety devices are mounted to selected vertical scaffold elements and the workers fasten safety lines to the safety devices.
When moving upwardly while erecting the scaffold or performing a work thereon, the worker can disengage one of the safety lines from one of the safety devices and then disengage the safety device from the flanges, while remaining fasten to at least another one of the safety devices through another safety line. Then, the worker can mount the disengaged safety device to other flanges located at a different location and fasten one of his safety lines to the repositioned safety device. The same operation can be performed several times while erecting the scaffold or performing a work thereon. A
possible fall of the worker is always limited by the length of the safety lines since he is always fasten to at least one safety device.
Alternatively, as shown in Fig. 5, the safety device can be used to fasten guy wire 56 for anchoring the scaffold 10 to the ground. More particularly, a first end of a guy wire is secured to the cable attachment member and an opposite end is anchored to the ground, at a certain distance from the scaffold base.
In an alternative embodiment shown in Fig. 6, the safety device can be used to fasten guy wires 56 for anchoring the scaffold 10 to concrete blocks 60 or any other anchoring element. In Fig. 6, the safety devices are mounted outwardly of the inner cage defined by the scaffold elements.
As a consequence, when using the safety device, the level of falling prevention is much higher than with the classical way of falling prevention since the load is transferred from the safety device to two spaced-apart flanges. For instance and without being limitative, in an embodiment, the safety device can support more than 4050 lb load comparatively to 2500 lb load for prior art safety devices which are mounted at a single location, i.e.
they are attached to a single scaffold member, and which does not distribute the load.
In a particular form of embodiment of the invention, for example, the accidental lifting of the flange fasteners out of the openings of the flanges might be prevented by providing OR File No. 19013-2CA - 7-an additional safety system, for example, by providing, in one of the wedges, a transverse bore opening in which a removable safety pin, a padlock or such might be provided.
The safety device 30 can be formed of aluminum or steel alloys for instance.
It can have a length ranging between 10 and 25 inches and, in an alternative embodiment, between and 23 inches.
In an alternative embodiment, the scaffolding pole joint can differ from the ring-shaped flanges 24 described above. For instance and without being limitative, it can be any member allowing to secure the safety device 30 to the vertical scaffold elements 12.
10 Moreover, the safety device 30 can be mounted directly to any other elements mounted to the vertical scaffold elements 12. For instance and without being limitative, in tube and clamp scaffolding, it can be mounted to scaffold clamp or other element mounted to the vertical scaffold element.
The shape of the joint fastener can vary in accordance with the members to which the 15 safety device is fastened.
It is appreciated that the safety device can include more than two safety device fasteners such as joint fasteners, each being securable to a respective scaffold member. Moreover, the safety device is not necessarily secured to scaffold joints but can be secured directly to vertical scaffold elements 12 or other scaffold components.
The safety device can be used with several types of scaffolds which do not necessarily include tubular scaffold elements 12, 14.
The embodiments of the invention described above are intended to be exemplary only.
For example and without being limitative, the shape of the eyelet can differ from the one shown in the above described embodiments. Moreover, the eyelet can be mounted anywhere along the longitudinal rod. The shape of the longitudinal rod 42 can differ from the one shown. The scope of the invention is therefore intended to be limited solely by the scope of the appended claims.
OR File No. 19013-2CA - 8-
Claims (34)
1. A scaffolding safety device comprising: a longitudinal bar having at least two spaced-apart safety device fasteners, each of the safety device fasteners being engageable with a vertical scaffold element, and a cable attachment member mounted to the longitudinal bar for fastening a securing cable thereto.
2. A scaffolding safety device as claimed in claim 1, wherein the safety device fasteners comprises joint fasteners engageable with a respective vertical scaffolding pole joint.
3. A scaffolding safety device as claimed in claim 2, wherein the vertical scaffolding pole joint comprises at least two flange-type scaffold joints and each of the joint fasteners comprises a flange fastener engageable with one of the at least two flange-type scaffold joints.
4. A scaffolding safety device as claimed in any one of claims 1 to 3, wherein the at least two safety device fasteners are mounted proximate to a respective end of the longitudinal bar.
5. A scaffolding safety device as claimed in claim 2, wherein the at least two joint fasteners are engageable with consecutive pole joints.
6. A scaffolding safety device as claimed in one of claims 2 and 5, wherein each of the joint fasteners comprises a connector defining a connector passage extending therethrough and a wedge extending through the connector passage and insertable in an opening of a respective one of the pole joints for engaging the joint fastener therewith.
7. A scaffolding safety device as claimed in any one of claims 1 to 6, wherein the cable attachment member comprises an eyelet defining an attachment hole and fastened to the longitudinal bar.
8. A scaffolding safety device as claimed in any one of claims 1 to 7, wherein the cable attachment member is mounted centrally of the longitudinal bar.
9. A scaffolding safety device as claimed in any one of claims 1 to 8, wherein the securing cable comprises a tether having a first end securable to the cable attachment member and an opposite end securable to a safety harness wearable by a worker.
10. A scaffolding safety device as claimed in any one of claims 1 to 9, wherein the securing cable comprises a guy wire having a first end securable to the cable attachment member and an opposite end anchorable to the ground.
11. A scaffolding safety device in combination with a scaffold having at least one vertical scaffolding pole, at least one of the vertical scaffolding pole having at least two pole anchoring elements spaced-apart from one another, the scaffolding safety device comprising a longitudinal bar having at least two spaced-apart fasteners and a cable attachment member mounted to the longitudinal bar for fastening a securing cable thereto, each of the spaced-apart fasteners being securable to a respective one of the at least two pole anchoring elements for securing the longitudinal bar to one of the at least one vertical scaffolding pole.
12. A combination as claimed in claim 11, wherein each of the pole anchoring elements comprises a flange-type scaffold joint and each of the fasteners comprises a flange fastener.
13. A combination as claimed in one of claims 11 and 12, wherein the fasteners are mounted proximate to a respective end of the longitudinal bar.
14. A combination as claimed in any one of claims 11 to 13, wherein the at least two fasteners are engageable with consecutive pole anchoring elements.
15. A combination as claimed in any one of claims 11 to 14, wherein each of the fasteners comprises a connector defining a connector passage extending therethrough and a wedge extending through the connector passage and insertable in an opening of a respective one of the pole anchoring elements for engaging the joint fastener therewith.
16. A combination as claimed in any one of claims 11 to 15, wherein the cable attachment member comprises an eyelet defining an attachment hole and fastened to the longitudinal bar.
17. A combination as claimed in any one of claims 11 to 16, wherein the cable attachment member is mounted centrally of the longitudinal bar.
18. A combination as claimed in any one of claims 11 to 17, wherein the securing cable comprises a tether having a first end securable to the cable attachment member and an opposite end securable to a safety harness wearable by a worker.
19. A combination as claimed in any one of claims 11 to 17, wherein the securing cable comprises a guy wire having a first end securable to the cable attachment member and an opposite end anchorable to a ground anchoring element.
20. A method for securing a security cable to a scaffold having at least one vertical scaffolding pole, the method comprising:
securing at least two spaced-apart safety device fasteners of a scaffolding safety device with one of the at least one vertical scaffolding pole;
and fastening the security cable with a cable attachment member mounted to a longitudinal bar extending between the two spaced-apart joint fasteners.
securing at least two spaced-apart safety device fasteners of a scaffolding safety device with one of the at least one vertical scaffolding pole;
and fastening the security cable with a cable attachment member mounted to a longitudinal bar extending between the two spaced-apart joint fasteners.
21. A method as claimed in claim 20, wherein at least one of the vertical scaffolding pole comprises at least two pole joints spaced-apart from one another and the safety device fasteners comprise joint fasteners, the method further comprises securing the joint fasteners with a respective one of the at least two pole joints of the at least one vertical scaffolding pole.
22. A method as claimed in claim 21, wherein said securing step further comprises engaging the joint fasteners with consecutive pole joints.
23. A method as claimed in any one of claims 20 to 22, wherein said fastening step comprises securing a first end of the security cable to the cable attachment member and an opposite end of the security cable securable to a safety harness wearable by a worker.
24. A method as claimed in any one of claims 20 to 22, wherein said fastening step comprises securing a first end of the security cable to the cable attachment member and anchoring an opposite end of the security cable to the ground.
25. A scaffolding safety device in combination with a scaffold having at least one vertical scaffolding pole, the scaffolding safety device comprising a longitudinal bar having at least two spaced-apart safety device fasteners and a cable attachment member mounted to the longitudinal bar for fastening a securing cable thereto, the spaced-apart safety device fasteners being securable to one of the vertical scaffolding poles.
26. A combination as claimed in claim 25, wherein at least one of the vertical scaffolding pole comprises at least two pole joints spaced-apart from one another and the safety device fasteners comprise joint fasteners securable to a respective one of the at least two pole joints for securing the longitudinal bar to one of the vertical scaffolding poles.
27. A combination as claimed in claim 26, wherein each of the pole joints comprises a flange-type scaffold joint and each of the joint fasteners comprises a flange fastener.
28. A combination as claimed in any one of claims 25 to 27, wherein the safety device fasteners are mounted proximate to a respective end of the longitudinal bar.
29. A combination as claimed in claim 26, wherein the at least two joint fasteners are engageable with consecutive pole joints.
30. A combination as claimed in claim 26, wherein each of the joint fasteners comprises a connector defining a connector passage extending therethrough and a wedge extending through the connector passage and insertable in an opening of a respective one of the pole joints for engaging the joint fastener therewith.
31. A combination as claimed in any one of claims 25 to 30, wherein the cable attachment member comprises an eyelet defining an attachment hole and fastened to the longitudinal bar.
32. A combination as claimed in any one of claims 25 to 31, wherein the cable attachment member is mounted centrally of the longitudinal bar.
33. A combination as claimed in any one of claims 25 to 32, wherein the securing cable comprises a tether having a first end securable to the cable attachment member and an opposite end securable to a safety harness wearable by a worker.
34. A combination as claimed in any one of claims 25 to 32, wherein the securing cable comprises a guy wire having a first end securable to the cable attachment member and an opposite end anchorable to the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2638490A CA2638490C (en) | 2008-07-31 | 2008-07-31 | Scaffolding safety device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2638490A CA2638490C (en) | 2008-07-31 | 2008-07-31 | Scaffolding safety device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2638490A1 true CA2638490A1 (en) | 2010-01-31 |
| CA2638490C CA2638490C (en) | 2015-10-06 |
Family
ID=41693075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2638490A Active CA2638490C (en) | 2008-07-31 | 2008-07-31 | Scaffolding safety device |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2638490C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102605942A (en) * | 2012-04-12 | 2012-07-25 | 四川省思培科技有限公司 | Falling protection device |
| DE102013006293A1 (en) * | 2013-04-12 | 2014-10-16 | AuG Kiel Betriebs GmbH | Universal device / attachment point for ladder systems in wind turbines On- / Off-Shore for lifting lifting equipment and hoisting winches. |
| CN106677514A (en) * | 2016-10-25 | 2017-05-17 | 厦门华柏科自动化科技有限公司 | External-installed triggering type anti-sink device |
| CN107524286A (en) * | 2017-09-20 | 2017-12-29 | 孙立民 | A kind of falling proof device of construction attachment type raise scaffold |
| GB2553803A (en) * | 2016-09-14 | 2018-03-21 | Lakeside Industries Ltd | Access tower |
| CN113638593A (en) * | 2021-06-18 | 2021-11-12 | 珠海华金开发建设有限公司 | Safety belt fastening method in whole process of scaffold assembling and disassembling |
| WO2023285771A1 (en) * | 2021-07-13 | 2023-01-19 | Jeffries Glen Edward | A connector |
-
2008
- 2008-07-31 CA CA2638490A patent/CA2638490C/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102605942A (en) * | 2012-04-12 | 2012-07-25 | 四川省思培科技有限公司 | Falling protection device |
| CN102605942B (en) * | 2012-04-12 | 2014-11-05 | 四川省思培科技有限公司 | Falling protection device |
| DE102013006293A1 (en) * | 2013-04-12 | 2014-10-16 | AuG Kiel Betriebs GmbH | Universal device / attachment point for ladder systems in wind turbines On- / Off-Shore for lifting lifting equipment and hoisting winches. |
| DE102013006293B4 (en) * | 2013-04-12 | 2014-11-06 | AuG Kiel Betriebs GmbH | Universal attachment point for ladder systems in wind turbines On- / Off-Shore for lifting and lowering lifting devices and hoisting winches |
| GB2553803A (en) * | 2016-09-14 | 2018-03-21 | Lakeside Industries Ltd | Access tower |
| CN106677514A (en) * | 2016-10-25 | 2017-05-17 | 厦门华柏科自动化科技有限公司 | External-installed triggering type anti-sink device |
| CN107524286A (en) * | 2017-09-20 | 2017-12-29 | 孙立民 | A kind of falling proof device of construction attachment type raise scaffold |
| CN107524286B (en) * | 2017-09-20 | 2019-11-22 | 江苏易明昌建设工程有限公司 | A kind of falling proof device of construction attachment type raise scaffold |
| CN113638593A (en) * | 2021-06-18 | 2021-11-12 | 珠海华金开发建设有限公司 | Safety belt fastening method in whole process of scaffold assembling and disassembling |
| CN113638593B (en) * | 2021-06-18 | 2023-01-20 | 珠海华金开发建设有限公司 | Safety belt fastening method in whole process of scaffold assembling and disassembling |
| WO2023285771A1 (en) * | 2021-07-13 | 2023-01-19 | Jeffries Glen Edward | A connector |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2638490C (en) | 2015-10-06 |
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| Date | Code | Title | Description |
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| EEER | Examination request |
Effective date: 20130712 |