CA2034227A1 - Device for burglar-proof locking of a door of a container, warehouse or the like - Google Patents
Device for burglar-proof locking of a door of a container, warehouse or the likeInfo
- Publication number
- CA2034227A1 CA2034227A1 CA 2034227 CA2034227A CA2034227A1 CA 2034227 A1 CA2034227 A1 CA 2034227A1 CA 2034227 CA2034227 CA 2034227 CA 2034227 A CA2034227 A CA 2034227A CA 2034227 A1 CA2034227 A1 CA 2034227A1
- Authority
- CA
- Canada
- Prior art keywords
- latch
- door
- key
- latch bolt
- bolt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Landscapes
- Lock And Its Accessories (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A device for the burglar-resistant locking of a door, such as container or warehouse door, comprises a slidable latch bolt intended to be mounted inside the door and co-operated with a receiving recess to lock the door. A key-operated latch permits withdrawal of the latch bolt. The latch includes a device for restraining the latch bolt in the withdrawn position. A guide guides a key on the end of an elongate, flexible key holder from the outside through an opening in the door to the latch thereby to permit the key to be inserted into the latch and the latch bolt to be withdrawn.
A device for the burglar-resistant locking of a door, such as container or warehouse door, comprises a slidable latch bolt intended to be mounted inside the door and co-operated with a receiving recess to lock the door. A key-operated latch permits withdrawal of the latch bolt. The latch includes a device for restraining the latch bolt in the withdrawn position. A guide guides a key on the end of an elongate, flexible key holder from the outside through an opening in the door to the latch thereby to permit the key to be inserted into the latch and the latch bolt to be withdrawn.
Description
This invention relates to locks, and in particular to a device for ensuring the burglar-resistant locking of a door, such as a container or warehouse door.
The device is of the type which comprises a sliding latch bolt.
It is an object of the invention to provide a safe, relatively cheap device which can be used to inhibit theft from containers, which is becoming an increasingly common problem.
Another object of the invention is to provide a device capable of ensuring the secure locking of warehouse doors.
According to the present invention there is provided a device for the burglar-resistant locking of a door, such as container or warehouse door, comprising a slidable latch bolt intended for mounting inside the door and co-operating with a receiving recess to lock the door; key-operated latch means permitting withdrawal of the latch bolt and including means for restraining the latch bolt in the withdrawn position; an elongate, flexible key holder; and guide means for guiding a key on the end of the key holder from the outside through an opening in the door to the latch means thereby to permit the key to be inserted into the latch means and subsequent withdrawal of the latch bolt.
The device can be used in combination with a secondary locking mechanism, such as an espagnolette device. In a preferred embodiment the device can be opened from both sides of the door. The invention can also provide a latch bolt, which is designed to prevent the locked door from being bent open by strong pull from outside.
The device is of the type which comprises a sliding latch bolt.
It is an object of the invention to provide a safe, relatively cheap device which can be used to inhibit theft from containers, which is becoming an increasingly common problem.
Another object of the invention is to provide a device capable of ensuring the secure locking of warehouse doors.
According to the present invention there is provided a device for the burglar-resistant locking of a door, such as container or warehouse door, comprising a slidable latch bolt intended for mounting inside the door and co-operating with a receiving recess to lock the door; key-operated latch means permitting withdrawal of the latch bolt and including means for restraining the latch bolt in the withdrawn position; an elongate, flexible key holder; and guide means for guiding a key on the end of the key holder from the outside through an opening in the door to the latch means thereby to permit the key to be inserted into the latch means and subsequent withdrawal of the latch bolt.
The device can be used in combination with a secondary locking mechanism, such as an espagnolette device. In a preferred embodiment the device can be opened from both sides of the door. The invention can also provide a latch bolt, which is designed to prevent the locked door from being bent open by strong pull from outside.
2~34~27 The invention will now be described in more detail, by way of example only, with reference to the accompanying drawings in which:-F`igure 1 shows one embodiment of the invention, seen in sideelevation, partly broken up, from the inside of a door;
Figure 2 shows schematically, parts of one embodiment of the invention, seen from one side;
Figure 3 shows a key holder with a key inserted; and Figure 4 shows schematically parts of one embodiment of the invention, which gives access from both sides of a door;
Figure 5 shows a latch bolt provided with an arrangement to inhibit forced opening of the door; and Figure 6 shows a door that has been partially forced open.
In figure 1, a door l is part of a shipping container (not shown), the outside of which is designated lO. The door 1 has wall 14. A latch bolt 2 is provided on the inside of the door 1 and is slidable in elongate guide 3. The latch bolt 2 co-operates with a recess in latch block 4, which is attached to the wall 14.
Firmly attached to the latch bolt 2 is a latch device 6.
This receives key 5, and is additionally provided with a latch pin 18 projecting from the side thereof, and which is arranged to arrest the latch bolt in a locking position. By turning a key 5, which is provided on a an elongated, flexible key holder 7, the latch pin 18 can be placed in a latching position as shown in more detail in figure 2. The key holder 7, while being flexible key holder is of course stiff to torsional forces.
203~227 The ~ey holder 7 is guided by a curved guide pipe ~
connecting a first opening g in the outside lo of the door 1 with the latch means 6. The keyholder 7 is releasably attached to the latch bolt, in this case via the latch means 6, for sliding displacement ~f the latch bolt 2 when the latch means 6 is not locked, that is to say when the latch pin does not prevent the latch bolt 2 from being displaced.
In figure 2 the line A-A indicates the separation line between a door and a wall.
In operation, the door is slammed shut in the usual manner, and the latch bolt 2 engages in latch block 4 under the action of compression springs 30. To open the door, the key 5 on the end of keyholder 7 is inserted through the pipe into the latch device 6 and turned through 90, which causes the key 5 to become engaged in the latch device 6, allowing the user to withdraw the latch bolt by pulling on the key holder 7. When the latch bolt is fully withdrawn, the user turns the key back through 90, and as a result the pin 18 becomes engaged in a slot in the latch device housing ( not shown), thereby retaining the latch bolt in the withdrawn position and allowing the door to be opened.
Figure 3 shows an embodiment of a key holder 7 with a bayonet-type connection 19 for keeping the key 5 firmly in the key holder 7. The releasable attachment between the key holder 7 and the latch bolt 2 can be arranged in different ways, via the latch means or a some pin and recess/arrangement directly between the key holder and the latch bolt.
In figure 4 an embodiment is shown, which allows access to the device according to the invention from both sides of the door, for example in a warehouse. There is provided a wall element 15, attached to said first guide means 2. This wall element can of course be the inside wall of a door. There is 20~4227 provided an inside wall opening 91 through which a keyholder 71 can be inserted to operate the deviee.
In figure 1, there are shown secondary locking means in the form of a guide collar 11 attaehed to one of the rods 13 of a rod-activated espagnolette type loeking mechanism, whieh is not shown in detail. The rod is guided by guide blocks 12 attached to wall 14. In its loeked position, the lateh bolt passes through the guide eollar 11, thus locking the espagnolette by preventing the rods 13 from being withdrawn.
Figures 5 and 6 show an embodiment of a device according to the invention, in which there is provided a recess 16 and lug 17, which co-operate to prevent the lateh bolt 2 from being displaced from its locking position in the latch block 4 in the event of a foreed strong pull on the door, that is to say any attempt at burglary.
As ean be seen in Figure 6, should the door be foreed, the lug 17 beeomes engaged in the reeess 16, thus jamming the door and inhibiting further movement.
Figure 5 shows two pins 20, 21, whieh eo-operate with eorresponding reeesses 22, 23 in the lateh bolt to allow a longer or shorter displaeement of the lateh bolt 2.
Figure 2 shows schematically, parts of one embodiment of the invention, seen from one side;
Figure 3 shows a key holder with a key inserted; and Figure 4 shows schematically parts of one embodiment of the invention, which gives access from both sides of a door;
Figure 5 shows a latch bolt provided with an arrangement to inhibit forced opening of the door; and Figure 6 shows a door that has been partially forced open.
In figure 1, a door l is part of a shipping container (not shown), the outside of which is designated lO. The door 1 has wall 14. A latch bolt 2 is provided on the inside of the door 1 and is slidable in elongate guide 3. The latch bolt 2 co-operates with a recess in latch block 4, which is attached to the wall 14.
Firmly attached to the latch bolt 2 is a latch device 6.
This receives key 5, and is additionally provided with a latch pin 18 projecting from the side thereof, and which is arranged to arrest the latch bolt in a locking position. By turning a key 5, which is provided on a an elongated, flexible key holder 7, the latch pin 18 can be placed in a latching position as shown in more detail in figure 2. The key holder 7, while being flexible key holder is of course stiff to torsional forces.
203~227 The ~ey holder 7 is guided by a curved guide pipe ~
connecting a first opening g in the outside lo of the door 1 with the latch means 6. The keyholder 7 is releasably attached to the latch bolt, in this case via the latch means 6, for sliding displacement ~f the latch bolt 2 when the latch means 6 is not locked, that is to say when the latch pin does not prevent the latch bolt 2 from being displaced.
In figure 2 the line A-A indicates the separation line between a door and a wall.
In operation, the door is slammed shut in the usual manner, and the latch bolt 2 engages in latch block 4 under the action of compression springs 30. To open the door, the key 5 on the end of keyholder 7 is inserted through the pipe into the latch device 6 and turned through 90, which causes the key 5 to become engaged in the latch device 6, allowing the user to withdraw the latch bolt by pulling on the key holder 7. When the latch bolt is fully withdrawn, the user turns the key back through 90, and as a result the pin 18 becomes engaged in a slot in the latch device housing ( not shown), thereby retaining the latch bolt in the withdrawn position and allowing the door to be opened.
Figure 3 shows an embodiment of a key holder 7 with a bayonet-type connection 19 for keeping the key 5 firmly in the key holder 7. The releasable attachment between the key holder 7 and the latch bolt 2 can be arranged in different ways, via the latch means or a some pin and recess/arrangement directly between the key holder and the latch bolt.
In figure 4 an embodiment is shown, which allows access to the device according to the invention from both sides of the door, for example in a warehouse. There is provided a wall element 15, attached to said first guide means 2. This wall element can of course be the inside wall of a door. There is 20~4227 provided an inside wall opening 91 through which a keyholder 71 can be inserted to operate the deviee.
In figure 1, there are shown secondary locking means in the form of a guide collar 11 attaehed to one of the rods 13 of a rod-activated espagnolette type loeking mechanism, whieh is not shown in detail. The rod is guided by guide blocks 12 attached to wall 14. In its loeked position, the lateh bolt passes through the guide eollar 11, thus locking the espagnolette by preventing the rods 13 from being withdrawn.
Figures 5 and 6 show an embodiment of a device according to the invention, in which there is provided a recess 16 and lug 17, which co-operate to prevent the lateh bolt 2 from being displaced from its locking position in the latch block 4 in the event of a foreed strong pull on the door, that is to say any attempt at burglary.
As ean be seen in Figure 6, should the door be foreed, the lug 17 beeomes engaged in the reeess 16, thus jamming the door and inhibiting further movement.
Figure 5 shows two pins 20, 21, whieh eo-operate with eorresponding reeesses 22, 23 in the lateh bolt to allow a longer or shorter displaeement of the lateh bolt 2.
Claims (7)
1. A device for the burglar-resistant locking of a door, such as container or warehouse door, comprising a slidable latch bolt intended for mounting inside the door and co-operating with a receiving recess to lock the door; key-operated latch means permitting withdrawal of the latch bolt and including means for restraining the latch bolt in the withdrawn position; an elongate, flexible key holder; and guide means for guiding a key on the end of the key holder from the outside through an opening in the door to the latch means thereby to permit the key to be inserted into the latch means and subsequent withdrawal of the latch bolt.
2. A device as claimed in claim 1, wherein the guide means is in the form of a smoothly curved pipe.
3. A device as claimed in claim 1, wherein the means for restraining the latch bolt in the withdrawn position comprises a pin in the latch means engageable with a slot when the key is withdrawn from the latch means.
4. A device as claimed in claim 1, further comprising secondary locking means that is locked by the latch bolt when in its extended position.
5. A device as claimed in claim 4, wherein the secondary locking means comprises an espagnolette type rod-activated locking mechanism, and said latch bolt is arranged to pass through a collar attached to one of the rods of the espagnolette, thereby preventing it from being opened.
6. A device as claimed in any of claims 1 to 5, further comprising additional guide means for guiding a key on the end of the key holder from the inside to the latch means to permit the key to be inserted into the latch means, thereby permitting withdrawal of the latch bolt from the inside.
7. A device as claimed in any of claims 1 to 5, the latch bolt and the latch block are provided with co-operating recess and lug means, which in the event of an attempted forced opening of the door from the outside, mutually engage to prevent the latch bolt from being displaced from its locking position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2034227 CA2034227A1 (en) | 1991-01-15 | 1991-01-15 | Device for burglar-proof locking of a door of a container, warehouse or the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2034227 CA2034227A1 (en) | 1991-01-15 | 1991-01-15 | Device for burglar-proof locking of a door of a container, warehouse or the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2034227A1 true CA2034227A1 (en) | 1992-07-16 |
Family
ID=4146846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2034227 Abandoned CA2034227A1 (en) | 1991-01-15 | 1991-01-15 | Device for burglar-proof locking of a door of a container, warehouse or the like |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2034227A1 (en) |
-
1991
- 1991-01-15 CA CA 2034227 patent/CA2034227A1/en not_active Abandoned
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |