Construction elevator equipped with fall protection

专利摘要:
A construction lift 1 has a mast 3 that can be attached to the outer wall of a building. The mast is provided with guides 13, 15 along which a lift car 5 and a counterweight 7 can be moved. At the top of the mast there are bypass wheels 9 which divert cables 11 via which the elevator car is connected to the counterweight. A gear rack 17 is attached to the front of the mast and drive motors 19 are attached to the elevator car which are provided with gear wheels 21 which engage with the rack. The cables are connected to the elevator car via measuring elements 23. The counterweight 7 is provided with a fall protection 27 which is controlled by a control unit 25 which is connected to the measuring elements 23. The control unit activates the fall protection at the moment that a signal is received from one of the measuring elements that the pulling force in the cable is strong decreased.
公开号:NL2020316A
申请号:NL2020316
申请日:2018-01-24
公开日:2018-08-01
发明作者:Van Gorp Ruud
申请人:Raxtar B V；
IPC主号:

专利说明:

Construction elevator provided with fall protection DESCRIPTION:
FIELD OF THE INVENTION
The invention relates to a construction lift comprising: a first vertical guide, a second vertical guide, a lift cage that is movable along the first guide and is provided with a fall protection, a counterweight that is movable along the second guide, at least one bypass wheel is connected to the guides, and a cable that is connected to the elevator car and the counterweight and runs over the bypass wheel.
State of the art
Such a construction lift is generally known. High safety requirements are set for a construction lift. To be able to meet these requirements, expensive safety systems must be present.
Summary of the invention
An object of the invention is to provide a construction lift of the type described in the preamble, wherein safety can be greatly increased with relatively simple means. To this end, a construction elevator according to the invention is characterized in that the counterweight is provided with a further fall protection. Providing the counterweight with fall protection prevents the counterweight from falling down in the event of a cable break and thereby causing damage. As a result, the construction elevator meets high safety requirements with simple means.
A favorable embodiment of the construction elevator according to the invention is characterized in that the elevator car is provided with a drive and the fall protection is integrated in the drive. This provides fall protection in a cost-effective manner. For example, the drive can be blocked or controlled in the upward direction when the fall protection is activated.
The construction lift preferably comprises a vertical gear rack and the drive comprises a gear wheel engaging the gear rack and an electric motor connected thereto. By switching the electric motor and making it work as a generator, it is possible to brake strongly on the motor and with this the elevator car can be decelerated gradually and powerfully.
A further favorable embodiment of the construction lift according to the invention is characterized in that the construction lift comprises a further vertical gear rack and the counterweight is provided with a further gear wheel which engages the further gear rack and is connected to the further fall protection. By braking the axle on which the further gear wheel is present, the counterweight is gradually brought to a halt. Here too the further fall protection can comprise an electric motor which is connected to the further gear wheel and which is then operated as a generator, so that the counterweight can also be braked gradually and forcefully.
A further embodiment of the construction elevator according to the invention is characterized in that the cable is connected via a measuring element to the elevator car and the construction elevator comprises a control unit which is connected to the fall protection and further fall protection and to the measuring element, which control unit is designed such that it the fall protection and / or further fall protection activates and / or the drive stops when a signal is received from the measuring element that the pulling force in the cable has decreased by more than a preset limit value. This makes it possible to intervene quickly in the event of a cable break or other malfunction, making the construction lift even safer.
A still further embodiment of the construction elevator according to the invention is characterized in that the construction elevator comprises a further circulation wheel, as well as a further cable which is connected to the elevator car and the counterweight and which runs over the further circulation wheel and which is connected to the elevator car via a further measuring element. The control unit is also connected to the further measuring element and is designed in such a way that it also activates fall protection and / or further fall protection and / or the drive stops when a signal is received from the further measuring element that the tractive force in the further cable has been taken with more than a preset limit value. The moment one of the cables breaks, the counterweight and the lift car are immediately blocked and the drive stopped before further damage can occur. This also increases safety further.
Brief description of the drawings
The invention will be explained in more detail below with reference to an exemplary embodiment of the construction lift according to the invention shown in the drawings. Hereby shows:
Figure 1 shows an embodiment of the construction lift according to the invention in side view;
Figure 2 shows the construction lift in perspective; and
Figure 3 shows the construction lift in front view.
Detailed description of the drawings
1-3 show an embodiment of the construction elevator according to the invention in different views. The construction lift 1 has a mast 3 that can be attached to the outside wall of a building. An elevator car 5 and a counterweight 7 can be moved along the outside of the mast. At the top of the mast there are circulation wheels 9 and 9 "on either side of the mast, which guide cables 11 and 11" through which the elevator car is connected to the counterweight.
The mast 3 is constructed from mast elements with a rectangular cross section. The mast elements are formed by four guide tubes at the corner points over which guide wheels attached to the elevator car and counterweight can run. The front two guide tubes form a first guide 13 along which the elevator car 5 can be moved and the two rear guide tubes form a second guide 15 along which the counterweight 7 can be moved. These guide tubes are mutually connected by connecting tubes.
A gear rack 17 is attached to the front of the mast and drive motors 19 are attached to the elevator car which are provided with gear wheels 21 which engage with the gear rack 17. The elevator car can hereby move up and down independently along the mast 3.
Measuring elements 43 and 43 '(load pins) are present between the cables 11 and 1Γ and the elevator car 5 which measure the tensile force in the cables and transmit a related signal to a control unit 45. This control unit is also connected to the electric motors 19. Through the to operate electric motors as a generator or to activate them in such a way that they want to move the lift car upwards, the electric motors in combination with the measuring elements and the control unit can act as fall protection.
The counterweight 7 is provided with a further fall protection. This can be designed as one of the many known fall protection devices or can also be formed by an electric motor 47 and a gearwheel connected thereto which engages a further gear rack 49 fixed to the mast 3. This further fall protection is also coupled to the control unit 45 and is activated by it at the moment that one of the measuring elements 43 and 43 'detects a strong decrease in the tensile force. Apart from being controlled by the control unit, the fall protection devices, if they are not activated by the control unit, will also be activated independently if a large fall acceleration is detected by additional sensors present.
Although in the foregoing the invention has been elucidated with reference to the drawings, it should be noted that the invention is by no means limited to the embodiment shown in the drawings. The invention also extends to all embodiments deviating from the embodiment shown in the drawings within the scope defined by the claims.

权利要求:
Claims (6)
[1]
A construction elevator (1) comprising: a first vertical guide (13), a second vertical guide (15), a lift cage (5) which is movable along the first guide and is provided with a fall protection, a counterweight (7) which the second guide is movable, at least one bypass wheel (9) connected to the guides, and a cable (11) which is connected to the elevator car and the counterweight and runs over the bypass wheel, characterized in that the counterweight (7 ) is provided with a further fall protection.
[2]
Construction elevator according to claim 1, characterized in that the elevator car (5) is provided with a drive and the fall protection is integrated in the drive.
[3]
Construction elevator according to claim 2, characterized in that the construction elevator comprises a vertical gear rack (17) and the drive comprises a gear wheel (21) which engages with the gear rack and an electric motor (19) connected thereto.
[4]
Construction elevator according to claim 3, characterized in that the construction elevator comprises a further vertical gear rack (49) and the counterweight (7) is provided with a further gear which engages the further gear rack and is connected to the further fall protection .
[5]
Construction elevator according to one of the preceding claims, characterized in that the cable (11) is connected via a measuring element (43) to the elevator car (5) and the construction elevator comprises a control unit (45) which is connected to fall protection and further fall protection and with the measuring element (43), which control unit is designed such that it activates the fall protection and / or further fall protection and / or the drive stops when a signal is received from the measuring element that the pulling force in the cable has decreased with more than a preset limit value.
[6]
Construction elevator according to claim 5, characterized in that the construction elevator comprises a further bypass wheel (9 ') and a further cable (11') which is connected to the elevator car (5) and the counterweight (7) and over the further circulation wheel and which is connected to the elevator car via a further measuring element (43 '), the control unit (45) also being connected to the further measuring element and designed in such a way that it activates fall protection and / or further fall protection and / or the drive stops at the moment that a signal is received from the further measuring element that the tensile force in the further cable has decreased by more than a preset limit value.

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同族专利:

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公开号 | 公开日

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NL2020316B1|2019-06-03|

引用文献:

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公开号 | 申请日 | 公开日 | 申请人 | 专利标题

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法律状态:

优先权:

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申请号 | 申请日 | 专利标题

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NL2018221|2017-01-24|

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