NL8301214A - Security system for electrically-operated gate - operates contact switches when gate is closed but operates beam interruption system when gate is open - Google Patents

Abstract

The gate, which is a rectangular steel frame with vertical bars is supported on wheels. When it is closed, physical contact with the end post operates microswitches mounted in a vertical strip on the gate edge. At the same time, a charging supply is connected to a relay which disables a transmitter on the gate and charges its internal battery. When the gate is open, the transmitter is switched on and it transmits an infra red or ultrasound beam to a receiver on the post. If an object, e.g. vehicle or person, interrupts the beam, a circuit sends a signal to a control station.

Description

ï-'m »- * -1- 23124 / JF / ts

Short designation: Protection device for a closing device, in particular electrically operated sliding gates and doors.

The invention relates to a safety device for a closing member which can be operated by means of a control circuit and an electric drive member, movable with respect to two stationary end members, in an end position thereof, in which one of the end members forms a stop for a front side of the closing member , closing the passage 10 between the two end members, wherein a clamping protection member is arranged on the front side of the closing member.

A safety device of the above-mentioned type is known, in which the clamping protection member consists of an air hose, which is arranged at the front of the closing member, for example a gate, and which opens a light-pressure switch when it is pressed and thereby the operation by means of the control circuit and the electric actuator stops or reverses. The contact formed by pressing the air pressure switch is transferred from the moving closing member to the stationary part in 2Q, in particular one of the end members, by means of rails and brushes or a towing cable.

The following drawbacks are associated with this known safety device. The pneumatic circuit with air hose and pressure switch is not reliable in the long run, for example due to a leak in the hose.

In practice, this is only established if it appears that the protection 25 does not work and damage may already have been caused. Therefore, the remedy is worse than the ailment, since it is believed that security is intact.

A second drawback is the problem of transferring the contact signal from the moving shutter to the stationary drive by means of a conductor rail or tow rope. If these facilities are not properly maintained, which often occurs in practice, many malfunctions will occur, which in turn will result in "bridging the security and doing without it, with all the disadvantages and chances of damage and accidents.

The invention aims at the above-mentioned drawbacks on the lifting and to that end provides an apparatus of the type mentioned in the preamble, characterized in that the shut-off member is provided with a power source, as well as in such a circuit with the power source and the clamp protection member. included transmission member, which is energized by energizing the clamp protection member to interrupt feeding of the transmission member through the power supply, and that the stop-end member is provided with such a the control circuit for the actuator received, which initial closure is terminated and / or converted to open control or is blocked if the receiver does not receive a transmission signal from the transmitter.

The advantage of the security device according to the invention is an optimum clamping protection vertically over the height of the closing member and also a passage protection by means of the transmitting receiving member, which can for instance be ultrasonic or infrared members. In particular, when the receiver does not receive a transmission signal from the transmitter for any reason; actuation of the clamp protector, interruption of the communication path between the transmitter and the receiver or by electrical interference, whether taking place in the circuit of the clamp protector or the circuit of the transmitter and receiver, the result is that the termination means when closing movement stops and / or reverses or closing is blocked. The control cart is standard made in 24 V DC, which can for example be used at night to charge the power source, for example a battery, of the closing device .

The clamping protection member is preferably a profile of non-rusting material, for instance stainless steel, which is spring-mounted. on the front of the shut-off member, in which profile a number of micro-switches depending on the height of the shut-off member is mounted, which are connected in series with the normally closed contact.

The transmitter connected to the terminating member is connected in series with the securing member to the rechargeable power source of the terminating member.

The invention will be elucidated hereinbelow with reference to an embodiment and with reference to the drawing, in which drawing: fig. 1 is a front view of a moving gate secured according to the present invention; Fig. 2 is a diagram of part of a security device according to the invention; and FIG. 3 is a schematic diagram of the control circuit portion of the protective device according to the invention.

Fig. 1 shows two end members 1 and 2, as well as a closing member 3 in the form of a moving gate. The end member 1 forms a stop in the closing end position of the closing member 3. The closing member 3 is movable by means of the wheels 32 and further comprises a rectangular open frame 30 with bars 31 arranged therein. Although a driving gate is shown in fig. 1, it is clear that the invention applies to various movable objects, such as electrically operated sliding gates and / or doors.

A clamping protection member 4 is arranged on the front side of the closing member 3, while a transmitting member 10 is further arranged on the closing member, in particular on two bars 31. The closing member 3 is also provided with a charging circuit 7, which, as will be described later, can be charged by means of a power supply circuit 8 of the end member 1 in the closing-end position of the closing member 3 by the power supply of the control circuit. The stop-end member 1 is further provided with a receiving member 6 with switch-15 element F.

The electronic circuitry of the transmitter, which may for example be an ultrasonic or infrared transmitter, is shown in more detail in FIG. 2.

In Fig. 2, a series circuit of the clamp protection member 4 and the transmitter 5 is connected to a rechargeable power source 71. The clamp protection member consists of a number of normally closed switching elements 41 connected in series. In principle, however, the connection to the power source also consist of a pinch-protecting member, which contains a normally open switching element connected parallel to the transmitter.

In a preferred embodiment, however, the security member 25 comprises a profile of non-rusting material, for example stainless steel, which is resiliently arranged over at least a part of the length of the end face of the closing member. In that profile preferably several micro-switches, depending on the length of the end face of the closing member, are mounted, which are connected in series with the normally closed contact.

In Fig. 2, the series circuit of the clamp protection member 4 and the transmission member 5 is connected to the rechargeable power source 71 by means of a switching element R of a relay 73, to which a diode 74 is connected in parallel. By energizing the relay 73, the switching element R of the relay 73 will switch from the drawn position to a second position, whereby a series connection is made of a diode 75, a resistor 76, which together charges the charging contacts 72 for a charging circuit. the rechargeable power source 71.

8301214 Ψ ν -4-23124 / JF / ts

Namely, in the closing-end position of the closing member 3, the charging contacts 72 come into contact with the power contacts 82 of the power supply circuit 8 in the stop-end member 1, which power supply circuit 8 is connected to the control circuit and is connected to the power supply. source of the control circuit. The charging circuit 7 is of course not necessary; after all, charging at the rechargeable power source 71 can also take place externally. It has been found in practice that the transmitter 5 can be used without problems for at least 50 to 60 hours without the battery 71 having to be recharged.

As usual, with regard to the end members 1 and 2, respective limit switches are included which are included in the control circuitry, as will be described later. The limit switch related to the stop-end member 1 is preferably included in the control circuit such that interrupting the power supply of the member 5 by connecting the contacts 72 and 82 will not affect the control of the electric actuator.

Fig. 3 shows an example of a control circuit.

Closing or opening control of the closing member 3 is instructed by pressing the return respectively closing and opening instruction switches D and 0. Parallel to the closing instruction switch D and open instruction switch 0, a first switching element HR1A of a first relay HR1 and a second switching element HR2B of a second relay HR2. The parallel connection of the close command switch D and the first switching element HR1A of the first relay HR1 is included in a series circuit connected to the power source, which further consists of a switching element F of the receiver, a normally closed first switching element HR2A of the second relay. HR2, a normally closed end-switch 1 related limit switch ES1 and the first relay HR 1 itself, to which an unspecified diode is connected in parallel. The first switching element HR1A of the first relay HR1 is normally open and serves to hold the relay after the closing instruction switch D has come back. Parallel to the series connection mentioned above, a second series connection is included, consisting of the parallel connection of the opening instruction switch 0 and the normally opened second switching element HR2B of the second relay HR2, a normally closed second switching element HR1B of the first relay HR1, a normally closed end switch 2 related to the switch ES2 and the second relay HR2 itself, to which also an unidentified diode is connected in parallel is switched '8 3 0 1 2 1 4 t * -5- 2312 ^ / JF / ts

In a first position, when the receiver 6 receives a transmission signal from the transmitter 5, a connection point between switching element HR1A and the closing instruction switch D is connected to the switching element HR2A. In a second position, on the other hand, when said transmitter signal is not received by receiver 6 , the switching element F of the receiving member 6 is in a second position, wherein said connection point is preferably connected by a delay means V to the connection point between the switching elements HR1B, HR2B and the open instruction switch 0.

The control circuit further comprises the relays MS1 and MS2 for control 10 of the electric actuator. When energizing MS1, the closing member 3 will move in the closing direction, while when energizing relay MS2, the closing member will move in the opening direction. The normally closed switching elements MS2A and MS1A are included in the control circuit to prevent relays MS1 and MS2 from being energized simultaneously, while the normally open third switching elements of the first and second relays HR1C and HR2C are included in the control circuit, respectively. energize relays MS1 and MS2.

The control of the closing member 3 will now be explained in more detail, assuming that the closing member is in the end position with respect to the end member 2. In the said end position, the passage between the end members 1 and 2 is open. This means that limit switch ES1 is closed and limit switch ES2 is open. If now the closing instruction switch D is pressed and receiver 6 receives the transmission signal from transmitter 25, which means that the passage is free, the clamp protection device is not energized and there are no electrical faults, a closed current path is created via closing instruction switch D switching element F of the receiver, normally closed switching element HR2A of the second relay HR2, limit switch ES1 and the relays HR1, whereby the first relay HR1 attracts, so that switching element HR1A closes and the relay HR1 remains energized, even after closing instruction switch D. the first relay HR1 closes the third switching element HR1C of the first relay HR1 and close control relay MS1 is energized, so that the closing member 3 will start to move, while the normally closed switching element MS1A of the close control relay MS1 opens, whereby the open control relay MS2 cannot endorsed. Also ein switch ES2 will open.

8301214 »-6-23124 / JF / ts

When no interruption of the transmission signal occurs, the closing member 3 eventually comes to the closing-end position, the end member 1 serving as a stop. As a result, the limit switch ES1 will be energized and open, causing the relay HR1 to drop and the closing control 5 to be terminated.

However, when the transmitting signal is interrupted by energizing the clamp protection device, by interrupting the communication path between the transmitting member and the receiving member 6 or by some electronic malfunction, switching element F of the receiving member will be interrupted during the closing of the locking member 3. 6 switch to the position not shown in fig. 3, as a result of which the first relay will also drop out, so that in this case a new current path will be created after a certain time delay, for example 2 seconds, via switching element HR1A, switching element F, delay member V, the switching element HR1B closed by the loss of HR1B, the closed limit switch ES2 and the second relay HR2, whereby the latter relay will be energized and will be opened analogously to the described closing control. The relay circuit shown can be replaced by an electronic, e.g. thyristor circuit .

20

The greatest advantage of the safety device according to the present invention is that the transmission of the pinch protection actuator has no moving parts, which are subject to wear and suffer from atmospheric influences.

8301214

Claims (7)

1. Protection device for a closing member which can be operated by means of a control circuit and an electric drive member, movable with respect to two stationary end members, which, in an end position thereof, in which one of the end members forms a stop for a front side of the closing member, closes a passage between the two end members, wherein a clamping protection member is arranged on the front side of the connecting member, characterized in that the closing member is provided with a power source, as well as a transmitter included in a circuit with the power source and the clamping protection member, that by energizing the clamp protection member the feed of the transmitter is interrupted by the power source, and that the stop-end member is provided with a receiving member included in the control circuit for the drive member such that when the receiving member does not receive a stop member, transmission signal from the transmitter initially closed control is ended and / or converted into open control, or closed control is blocked. Securing device according to claim 1, characterized in that the clamping protection member is arranged over at least a part of the length of the front side of the closing member, and contains one or more normally closed switching elements and in that the clamping member is in series with the clamping member. P the power supply of the shut-off device is connected. Security device according to claim 1 or 2, characterized in that the clamping protection member is a switching rail mounted resiliently on said end face of the closing member with one or more spaced apart micro-switches or micro-switches arranged in series. / Security device according to one of the preceding claims, characterized in that the transmitter and the receiver are in line with each other and are an ultrasonic or infrared transmitter and receiver, respectively. Security device according to any one of the preceding claims, characterized in that the power source is rechargeable and the shut-off element is further provided with a charging circuit with at least one charging contact and, with respect to the stop-end element, is provided with a power circuit * with at least one power contact such that in the terminating end position of the terminating member the contacts mentioned 8301214 ^ -8-23124 / JF / ts WV, ft * are connected to each other, thereby charging the power source through the power circuit through the charging circuit. 6. Protection device according to claim 5, characterized in that the charging circuit * is provided with a relay connected to the charging contacts, which upon actuation causes a switching element thereof to switch from a first position to a second position, in which first position a closed circuit comprising the rechargeable power source, the security member and the transmitter member is formed and in which second position a connection is established between the charging contacts and the rechargeable power source. A protective device according to any one of the preceding claims, wherein the control circuit, both related to the stop-end member and the other end member, is provided with a first and second limit switch, respectively, as well as a first and second relay, which, when energized, actuates the drive member. controls that the closing member closes or opens the passage between the end members, respectively, characterized in that the receiving member is provided with a switching element which is in a first state when the transmission signal is received from the transmitter and when it is not received. transmit signal is in a second state and the control circuit includes a close command switch and an open command switch, a first series circuit consisting of the normally open close command switch with a normally open first switching element of the first relay in parallel, the switching element, a normally closed first switching element from n the second relay, the normally closed first limit switch and the first relay are connected to a power supply * of the control circuit, while in parallel with the first series circuit a second series circuit, consisting of the normally open open instruction switch and a normally open second in parallel switching element of the second relay, a normally closed second switching element; 30 of the first relay, the normally closed second limit switch and the second relay is connected to the power supply of the control circuit and wherein the c switching element in its first state connects the connection point between the closing instruction switch and the first switching element of the first relay to the first switching element of the second relay and in its second state the said connection point between the closing instruction switch and the first switching element of the first relay connects to the connection point between the opening instruction switch, the second switching element of the second relay and the second switching element 8301214 o CM O - 4. rv) «Λ 45s