NL2018680B1 - The present invention relates to an anchor device for a fall protection device and to a fall protection system. - Google Patents
The present invention relates to an anchor device for a fall protection device and to a fall protection system. Download PDFInfo
- Publication number
- NL2018680B1 NL2018680B1 NL2018680A NL2018680A NL2018680B1 NL 2018680 B1 NL2018680 B1 NL 2018680B1 NL 2018680 A NL2018680 A NL 2018680A NL 2018680 A NL2018680 A NL 2018680A NL 2018680 B1 NL2018680 B1 NL 2018680B1
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- Netherlands
- Prior art keywords
- boom
- mast
- sleeve
- anchor device
- anchor
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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
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Emergency Lowering Means (AREA)
Abstract
The present invention relates to an anchor device for a fall protection device, comprising a davit structure having a mast and a boom, wherein the boom is mounted at a first end to the mast with a boom mounting unit, The boom mounting unit comprises a boom sleeve having a through-going opening through which the mast extends, wherein the boom sleeve is movable in longitudinal direction along the mast to adjust a height level of the boom and wherein the boom is fixedly mounted to the boom sleeve such that a downward force exerted on a second end of the boom, opposite to the first end, results in clamping of the boom sleeve on the mast.
Description
Θ 2018680
Octrooicentrum Nederland © Aanvraagnummer: 2018680 © Aanvraag ingediend: 10 april 2017 © BI OCTROOI © Int. Cl.:
A62B 35/00 (2018.01)
| (4^ Aanvraag ingeschreven: | © Octrooihouder(s): |
| 19 oktober 2018 | Ziet Verder Beheer B.V. te BLARICUM. |
| © Aanvraag gepubliceerd: | |
| - | © Uitvinder(s): |
| Jozef Maria Westerweel te BLARICUM. | |
| © Octrooi verleend: | |
| 19 oktober 2018 | |
| © Gemachtigde: | |
| © Octrooischrift uitgegeven: | ir. H.V. Mertens c.s. te Rijswijk. |
| 9 januari 2019 |
54) The present invention relates to an anchor device for a fall protection device and to a fall protection system.
© The present invention relates to an anchor device for a fall protection device, comprising a davit structure having a mast and a boom, wherein the boom is mounted at a first end to the mast with a boom mounting unit,
The boom mounting unit comprises a boom sleeve having a through-going opening through which the mast extends, wherein the boom sleeve is movable in longitudinal direction along the mast to adjust a height level of the boom and wherein the boom is fixedly mounted to the boom sleeve such that a downward force exerted on a second end of the boom, opposite to the first end, results in clamping of the boom sleeve on the mast.
NL Bl 2018680
Dit octrooi is verleend ongeacht het bijgevoegde resultaat van het onderzoek naar de stand van de techniek en schriftelijke opinie. Het octrooischrift komt overeen met de oorspronkelijk ingediende stukken.
P33144NL00/MVM
The present invention relates to an anchor device for a fall protection device and to a fall protection system.
Anchor devices are used to provide an anchor point for personal fall protection devices. The anchor device may also be used to mount a winch or similar device to lift and/or lower a person.
These anchor devices may be mobile or stationary, and may typically be arranged next to a location where there is a substantial risk of a person falling down from a substantial height, for example on a roof, on a high construction, or next to a man hole of a large container. The personal fall protection device is mounted on the anchor device so that the anchor device is used as anchor point. The personal fall protection device is configured to safely stop the fall of a person when this person would inadvertently fall down.
In an embodiment of an anchor device, a davit structure is used to provide such anchor point. A davit structure comprises a mast and a boom connected at one end to the mast. The free end of the boom may be arranged above a location where a person needs to descent or ascent. The lanyard of the personal fall protection device may be guided over a pulley provided at or near the free end of the boom such that a lanyard of a personal fall protection device can hang substantially vertical from the anchor device.
With increasing demands on personal safety using fall protect equipment, there is also the need to improve the structure and reliability of anchor devices providing an anchor point for personal fall protection devices, without sacrificing the flexibility of use of this equipment.
It is an aim of the invention to provide an anchor device of improved construction, or at least to provide an alternative.
The present invention provides an anchor device as claimed in claim 1.
An important aspect of the anchor device of the invention is that the boom mounting unit comprises a boom sleeve having a through-going opening through which the mast extends, wherein the boom sleeve is movable in longitudinal direction along the mast to adjust a height level of the boom and wherein the boom is fixedly mounted to the boom sleeve such that a downward force exerted on a second end of the boom, opposite to the first end, results in clamping of the boom sleeve on the mast.
Due to the boom sleeve the boom height can easily adjusted by movement of the boom sleeve to a desired height level along the mast. At a desired height level the boom sleeve may preferably be locked, for example by a locking device, to avoid inadvertent vertical movement of boom sleeve along the mast.
-2Furthermore, since the boom is fixedly mounted to the boom sleeve, a downward force exerted on the boom will result in a tilting of the boom sleeve with respect of the mast. This tilting will clamp the boom sleeve on the mast. Such downward force may typically be present when the fall of a person is arrested. This downward force is used in the present invention to increase the structural strength of the anchor device.
Thus, the anchor device provides a proper strength of the construction, while at the same time offering a relative easy adjustment of the height of the boom, when needed.
In an embodiment, the anchor device comprises a device mounting unit to mount a device, in particular a fall protection device, on the anchor device, wherein the device mounting unit comprises a device sleeve having a through-going opening through which the mast extends.
Similarly to the boom sleeve, a pulling force exerted on the device sleeve, in particular in vertical direction will clamp the device sleeve on the mast, resulting in an increase of the structural strength of the anchor device. At the same time the device sleeve allows for easy adjustment of the height level of the device mounting unit. This height adjustment is for example advantageous to adapt the height of the device mounting unit to the height of a person operating a device mounted on the device mounting unit.
In an embodiment, an inner surface of the through-going opening of the boom sleeve substantially mates with the outer surface of the mast.
In an embodiment, an inner surface of the through-going opening of the device sleeve substantially mates with the outer surface of the mast.
In an embodiment, the boom sleeve comprises a first mast contact surface to contact a side of the mast facing towards the boom and a second mast contact surface to contact a side of the mast facing away of the boom, wherein the first mast contact surface is lower than the second mast contact surface.
In an embodiment, the boom sleeve comprises two plate shaped elements between which the mast is arranged and between which the first end of the boom end is fixed.
In an embodiment, the device sleeve is shaped to clamp on the mast when an upward force is exerted on a device mounted on the device mounting unit.
In an embodiment, the mast comprises a first pulley at or near its top end and wherein the boom comprises a second pulley at or near the second end, wherein the first pulley and the second pulley are arranged to receive a line of a device is mounted on the device mounting unit.
In an embodiment, the anchor device comprises a locking device to lock the boom sleeve at one or more height levels along the mast.
In an embodiment, the anchor device comprises a second locking device to lock the device sleeve at one or more height levels along the mast.
-3In an embodiment, a bottom end of the mast is mounted, preferably rotatable, in a mounting base arranged to fix the anchor device on a support structure.
In an embodiment, the boom comprises two or more boom parts that are movable with respect to each other in a longitudinal direction of the boom to adjust a length of the boom.
The invention further provides a fall protection system, comprising: the anchor device of any of the claims 1-11, and a fall protection device mounted to the anchor device.
An embodiment of an anchor device and a fall protection system comprising such anchor device according to the invention will now be described in further detail, by way of example only, with reference to the accompanying drawings, in which:
Figures 1 and 2 show perspective views of an embodiment of the anchor device according to the invention;
Figure 3 show a side view of a fall protection system comprising the anchor device of Figures 1 and 2.
Figures 1 and 2 show an embodiment of an anchor device according to the invention. The anchor device, generally denoted by reference numeral 1, comprises a davit construction having a mast 2 and a boom 3.
The anchor device 1 is configured to provide an anchor point for a fall protection system.
At the bottom end of the mast 2, a mounting base 4 is provided. The mast extends in a substantial vertical direction and is arranged rotatably in the mounting base 4 to enable rotation of the mast 2 with respect to the mounting base 4. The mounting base 4 is configured to mount the anchor device 1 to a support structure 100 (not shown). The support structure may be any structure, stationary or movable, suitable to support the anchor device 1, such as a floor surface.
The boom 3 is mounted on the mast 2 with a boom sleeve 5. The boom sleeve 5 comprises two plate elements 6 that are connected to each other. The boom sleeve 5 is configured to enclose the mast 2 in such a way that the boom sleeve 5 is slidable in vertical direction over the mast 2 to adjust a height position of the boom sleeve 5 on the mast 2. The mast comprises substantially the same cross section over a substantial part of the length of the mast 2 to allow the boom sleeve 5 to be displaced over the mast 2.
A locking device 7, for example a locking pin may be provided to lock a vertical position of the boom sleeve 5 with respect to the mast 2. The locking device 7 is provided to lock the boom sleeve 5 on the mast 2 during use of the anchor device 1 as an anchor point for a fall protection system. The boom sleeve 5 may comprise a through-going bore through which the locking pin may be arranged in a locking pin hole in the mast 2 to prevent vertical movement of the boom sleeve 5 with respect to the mast 2. The mast 2 may comprise multiple locking pin hole arranged at different heights to enable locking of the boom sleeve 5 at these different heights.
The boom 3 comprises two boom parts 8 that are telescopically slidable with respect to each other to adjust the length of the boom 3 to a desired length. A locking screw 8a may be provided to lock the boom parts 8 with respect to each other at a desired length. In an alternative embodiment, the boom 3 may be formed from one integral boom element.
The boom 3 does not comprise any boom parts that are rotatably mounted with respect to each other.
The boom 3 comprises a first end connected to the mast 2 and a second free end. The first end of the boom 3 is fixedly mounted to the boom sleeve 5. As a result of the fixed connection between the first end of the boom 3 and the boom sleeve 5, a downward force exerted on the free end of the boom will result in a clamping action of the boom sleeve 5 on the mast 2 which improves the structural strength of the anchor device 1.
To facilitate clamping of the boom sleeve 5 on the mast 2, the boom sleeve 5 comprises a first mast contact surface 9 to contact a side of the mast 2 facing towards the boom 3 and a second mast contact surface 10 to contact a side of the mast 2 facing away of the boom 3, wherein the first mast contact surface 9 is arranged at a lower height than the second mast contact surface 10.
The anchor device 1 further comprises a device mounting unit 11. The device mounting unit 11 comprises two brackets 11a each configured to mount a fall protection device or other suitable device, such as a winch, on the anchor device 1.
The device mounting unit 11 comprises a device sleeve 12 having a through-going opening through which the mast 2 extends. The device sleeve 12 comprises two plate elements 13 that are connected to each other to form the thoroughgoing opening therebetween. The brackets 11a are fixedly mounted on the device sleeve 12.
The device sleeve 12 is configured to enclose the mast 2 in such a way that the device sleeve 12 is slidable in vertical direction over the mast 2 to adjust a height position of the device sleeve 12 on the mast 2, but that tilting of the device sleeve 12 with respect to the mast 2 results in clamping of the device sleeve 12 on the mast 2.
The adjustment of the height of the device sleeve and therewith of the device mounting unit 11 may be desirable to adapt the height of a fall protection device mounted on the device mounting unit to an operator of the device. In this way the height can be ergonomically adjusted to the height of the operator.
A locking device 14 may be provided to lock a vertical position of the device sleeve 12 with respect to the mast 2. The locking device 14 is provided to lock the device sleeve 12 on the mast 2 at a desired height during use of the anchor device 1 as an anchor point for the fall protection system 50.
To facilitate clamping of the device sleeve 12 on the mast 2, the device sleeve 12 comprises a first mast contact surface to contact a side of the mast 2 facing towards the brackets 11a and a second mast contact surface to contact a side of the mast 2 facing away of the brackets 11a, wherein the first mast contact surface is arranged at a larger height than the second mast contact surface.
The mast 2 comprises a first pulley 15 at or near its top end and the boom 3 comprises a second pulley 16 at its free end. The first pulley 15 and the second pulley 16 are arranged to receive a lanyard 51 of a fall protection device 50 mounted on the device mounting unit 11. The lanyard 51 may be any line suitable to be used in a personal fall protection device.
The mast 2 also comprises a third pulley 17 at or near its top end and the boom 3 comprises a fourth pulley 18 at its free end. The third pulley 17 and the fourth pulley 18 are arranged to receive a second line of a second fall protection device or other device mounted on the device mounting unit 11.
Figure 3 shows a fall protection system comprising the anchor device 1 of Figures 1 and 2. The fall protection system further comprises a fall protection device 50 comprising a lanyard 51 and a deceleration device 52.
The fall protection device 50 is mounted on one of the brackets 11a. The lanyard 51 is arranged over the first pulley 15 at the top end of the mast 2 and the second pulley 16 arranged at the free end of the boom 3. At the free end of the lanyard 51 a connection point 53 is provided.
The anchor device 1 is mounted with its mounting base 4 on a support structure 60, such as a roof, wall, quay, industrial structure, etc., next to a vertical wall 61. On the vertical wall 61 a ladder 62 is provided in order to allow a person to descent and/or ascent the vertical wall 61. To prevent that a person that slips from the ladder 62 will fall down without any protection, the person may be connected to a connection point 53 of the lanyard 51 of the fall protection device 50.
The boom 3 of the anchor device 1 is arranged at a desired height. As explained above, this height can easily be adjusted by movement of the boom sleeve 5 along the mast
2. Correspondingly, the height of the fall protection device 50 can easily be adjusted by movement of the device sleeve 12 along the mast 2. When needed the length of the boom 3 can be adjusted by sliding movement of the boom parts 8 with respect to each other.
When the person is connected to the connection point 53, for example using a harness worn by the person, the person can safely descent the ladder. When the person would inadvertently fall from the ladder 63, the fall protection device 50 will come into action to arrest the fall of the person, whereby the deceleration device 52 ensures that the fall is not stopped too abruptly in order to prevent or at least minimize injury due to arresting the fall.
When a fall is arrested by the fall protection device 50 a substantial vertical downward force will be exerted on the second pulley 16 at the free end of the boom 3. This downward force results in a tilting of the boom sleeve 5 at the opposite end of the boom 3 as a result of which the boom sleeve 5 is firmly clamped on the mast 2. The first mast contact surface 9 and the second mast contact surface 10 are firmly pressed against the respective mast surfaces.
Similarly, the lanyard 51 will exert a pulling force on the fall protection device 50 in the direction of the first pulley 15 provided at the top end of the mast 2. This pulling force results in a tiling movement of the device sleeve 12 with respect to the mast 2. This also results in the device sleeve 12 being firmly clamped on the mast 2.
Thus, the force resulting from the person falling down being arrested by the fall protection device 50 causes the boom sleeve 5 and the device sleeve 12 to be clamped on the mast 2. This improves the structural strength of the anchor device 1 when needed. At the same time, the construction of the anchor device 1 provides flexibility to easily adjust the height level of the boom 3 and the height level of the device mounting unit 11.
It is remarked that the fall protection system may also be used to lift and/or lower a person in a vertical or substantial vertical direction.
In such embodiment a winch 70 may, for example, be mounted on the device mounting unit 11. In the embodiment shown in Figure 3, the winch is mounted on the lower one of the two brackets 11a. A winch line of the winch 70 may be arranged over the third pulley 17 arranged next to the first pulley 15 and over the fourth pulley 18 arranged next to the second pulley 16. The person to be lifted or lowered may be attached to the part of the winch line hanging down from the fourth pulley 18.
Before lifting or lowering, the height of the boom 3 and the height of the device mounting unit 11 can easily be adjusted by movement of the boom sleeve 5 and the device sleeve 12 along the mast 2, respectively. For example, it may be desirable to arrange the winch at a suitable height for operating the winch 70.
The person hanging from the winch line during lifting and/or lowering will exert a vertical downward force on the fourth pulley 18 at the free end of the boom 3, resulting in a tiling movement of the boom 3 that clamps the boom sleeve 5 on the mast 2. Similarly, the pulling force on the winch in the direction of the third pulley 17 will clamp the device sleeve 12 on the mast 2. Thus the gravity force on the person hanging from the anchor device 1 is used to increase the structural strength of the anchor device 1.
It is remarked that since the first pulley 15 and the second pulley 16 are used for a first line, for example the lanyard 51 and the third pulley 17 and the fourth pulley 18 are used for a
-7second line, for example the winch line, two devices mounted on the brackets 11a may simultaneously be used, for example the personal fall protection device 50 and the winch 70.
-8Reference numerals anchor device mast boom mounting base boom sleeve plate element locking device boom parts
8a locking screw first mast contact surface second mast contact surface device mounting unit a bracket device sleeve plate element locking device first pulley second pulley fall protection system lanyard deceleration device connection point support structure vertical wall ladder winch
Claims (12)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL2018680A NL2018680B1 (en) | 2017-04-10 | 2017-04-10 | The present invention relates to an anchor device for a fall protection device and to a fall protection system. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL2018680A NL2018680B1 (en) | 2017-04-10 | 2017-04-10 | The present invention relates to an anchor device for a fall protection device and to a fall protection system. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL2018680B1 true NL2018680B1 (en) | 2018-10-19 |
Family
ID=59351016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL2018680A NL2018680B1 (en) | 2017-04-10 | 2017-04-10 | The present invention relates to an anchor device for a fall protection device and to a fall protection system. |
Country Status (1)
| Country | Link |
|---|---|
| NL (1) | NL2018680B1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6401863B1 (en) * | 1999-12-28 | 2002-06-11 | Best Rescue Systems, Inc. | Multi-purpose portable davit anchoring system |
| US20040195041A1 (en) * | 2003-04-07 | 2004-10-07 | Jan Vetesnik | Fall restraint anchoring post |
| US20080035594A1 (en) * | 2004-06-29 | 2008-02-14 | Jeffrey Lee Crowder | Crane |
-
2017
- 2017-04-10 NL NL2018680A patent/NL2018680B1/en active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6401863B1 (en) * | 1999-12-28 | 2002-06-11 | Best Rescue Systems, Inc. | Multi-purpose portable davit anchoring system |
| US20040195041A1 (en) * | 2003-04-07 | 2004-10-07 | Jan Vetesnik | Fall restraint anchoring post |
| US20080035594A1 (en) * | 2004-06-29 | 2008-02-14 | Jeffrey Lee Crowder | Crane |
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