GB1583726A - Anchoring device for wastening doors and the like - Google Patents

Description

(54) AN ANCHORING DEVICE FOR FASTENING DOORS AND THE LIKE (71) I, JOSt BURGLES L6PEZ, a Spanish national, of Alvarez Buhilla, 43 Mataro, Barcelona, Spain, do hereby declare the invention for which I pray that a patent may be granted to me, and the method by which it is to be performed, to be particularly described in and by the following statement: This invention relates to an anchoring device for the fastening of doors, roller blinds, shutters or the like, of the kinds which have a ring to he locked by a padlock to a fixed point and which are in current use for the closure of the entrances in trading and warehousing establishments and for the protection of shop windows and external show cases.

For convenience, these will simply be referred to as "doors or the like".

It is an object of the present invention to provide an anchoring device for fastening doors and the like which is uncomplicated in structure and secure in operation, to assure retention of a door in the closed position wtih a high degree of reliability, in cooperation wth a conventional locking device such as a padlock.

According to the present invention, there.

is provided a retractable anchoring device for enabling a locking member to fasten a door or the like to the device, which device comprises: (i) a generally cylindrical casing suitable to be securely buried in a floor with an open upper end substantially flush with the surface of the floor, the casing having a tapped inner face; (ii) a sleeve fitting within at least the upper part of the casing and retained therein by engagement of an external screw thread in said tapped face d the casing; (iii) a rod mounted within the sleeve so as to be axially displaceable between an extended operative position and an inoperative position wherein it is retracted within the casing, the rod having (a) in its uplper portion which projects (in the extended position) beyond the sleeve and casing, a transverse bore for receiving a locking member to fasten the door or the like, and (b) on its lower portion which is always within the casing, projecting means which cb operates with said sleeve so as to retain the rod in its extended or retracted position, in accordance with the rotation of the rod between two radial positions, and (iv) within the base of the casing, a coil spring which urges the rod toward its extended position.

The cylindrical casing is installed to lie substantially flush with the surface of a floor, the rod being axially movable by the action of the spring on release of the projecting means (retaining pin) so as to rise above the level of the floor to the extended position.

When extended, the rod lies adjacent to a projecting member such as a ring secured for this purpose at the bottom edge of the door, shutter or the like to be locked, and the bore in the rod can then be locked by a padlock or other locking member to the member projecting from the door.

When the door is unlocked or opened (or the shutter or roller blind is raised) the rod is depressed to a retracted position where it is retained within the cylindrical casing by the rod being turned through about 900 so that the retaining pin engages the bottom end of the sleeve. The spring housed at the bottom of the casing is, of course, compressed by the rod in this retracted position.

To free the rod, it is sufficient to turn the rod back though 900, so that the ends of the pin are brought into alignment with slots formed in the sleeve, whereupon the rod urged by the spring will be displaced axially. To facilitate the turning operation, a slot intended to receive a coin or conventional tool may be formed in the top d the rod.

An embodiment of the present invention will now be described, by way of example, with reference to the accompanying drawings in which: Figure 1 is a cross-section showing a device according to the invention, for fastening doors and roller blinds; Figure 2 is a section on the line Ir-Il of Figure 1; and Figure 3 is a section on the line Ill-Ill of Figure 1.

Referring to the drawings, the safety device comprises a cylindnical casing 1 housing a rod 2 which is axially displaceable in a sleeve 3. The sleeve 3 is engaged by means of its screw-thread 4 in a mating screw-threaded part 5 in the inner face of the casing 1.

A central post 7 extends upwardly from the inner face of base 6 of the cylindrical casing 1 to position a spring 8 in a recess 9 in the base of the rod 2. The spring urges the rod 2 outwardly from the assembly to the position indicated in broken lines at 10.

In this extended position, a bore 11 formed in the red 2 is in alignment with an eye 12 formed in a projecting lug 13 which extends from door 14, for the insertion of a padlock 15.

Beyond its screw-thread 4, the sleeve 3 extends as a tubular section 16 which is formed with two slots 17 that are identical and op posed. At the top, the sleeve 3 terminates in an annular flange 18 which extends radially and engages the surface of the floor.

The rod 2 remains housed but axially displaceable in the assembly formed by the cylindrical casing 1 and the sleeve 3, the rod having a transverse bore 19 in its lower part to carry a pin 20 which has end parts 21 projecting a little beyond the surfaces of the rod. This arrangement enables the red 2 to be placed in two positions, that is to say a retracted position in which the parts 21 en gage the bottom edge of the tubular section 16, and an extended position in which the end parts 21 of the rod are received by the slots 17.

A slot 22 fonned in the top of the rod 2 facilitates turning of the rod from one posi tion to the other. Thus, in operation of the device, the rod 2 can readily be turned in the direction of the arrows shown in Figure 3, and so moved from its unobtrusive retracted position to the extended position (10) where it provides a safe anchorage for fastening the door 14 in its closed position by means of the padlock 15.

WHAT I CLAIM IS: 1. A retractable anchoring device for enabling a locking member to fasten a door or the like to the device, which device comprises: (i) a generally cylindrical casing suitable to be securely buried in a floor with an open upper end substantially flush with the surface of the floor, the casing having a tapped inner face; (ii) a sleeve fitting within at least the upper part of the casing and retained therein by engagement of an external screw thread in said tapped face of the casing; (iii) a rod mounted within the sleeve so as to be axially displaceable between an ex tended operative position and an inoperative position wherein it is retracted within the casing, the red having (a) in its upper portion which projects (in the extended position) beyond the sleeve and casing, a transverse bore for receiving a locking member to fasten the door or the like, and (b) on its lower portion which is always within the casing, projecting means which cooperates with said sleeve so as to retain the rod in its extended or retracted position, in accordance with the rotation of the rod be- tween two radial positions and (iv) within the base of the casing, a coil spring which urges the rod toward its extended position.

2. A device as claimed in Claim 1, wherein the sleeve has two opposed longitudinal slots which extend axially, and the said projecting means on the rod is a pin held in a second bore, in the lower portion of the rod, the ends of the pin being capable of being placed by radial rotation of the rod (a) in said slots to allow the rod to be urged to its extended position or (b) engaged with the lower end of the sleeve so as to retain the rod in its retracted position.

3. A device according to any preceding claim, in which a slot is formed in the. outer end of said rod to facilitate said rotation the rod.

4. A device as claimed in any preceding claim, which includes a post at the base of the casing axially beneath said rod, the post serving to retain the coil spring.

5. A device as claimed in any pceceing claim, wherein the ooil spring fits into a recess within the base of the rod.

6. An anchoring device for doors or the like, substantially as hereinbefore described with reference to the accompanying drawings.

**WARNING** end of DESC field may overlap start of CLMS **.

Claims (6)

**WARNING** start of CLMS field may overlap end of DESC **. Figure 2 is a section on the line Ir-Il of Figure 1; and Figure 3 is a section on the line Ill-Ill of Figure 1. Referring to the drawings, the safety device comprises a cylindnical casing 1 housing a rod 2 which is axially displaceable in a sleeve 3. The sleeve 3 is engaged by means of its screw-thread 4 in a mating screw-threaded part 5 in the inner face of the casing 1. A central post 7 extends upwardly from the inner face of base 6 of the cylindrical casing 1 to position a spring 8 in a recess 9 in the base of the rod 2. The spring urges the rod 2 outwardly from the assembly to the position indicated in broken lines at 10. In this extended position, a bore 11 formed in the red 2 is in alignment with an eye 12 formed in a projecting lug 13 which extends from door 14, for the insertion of a padlock 15. Beyond its screw-thread 4, the sleeve 3 extends as a tubular section 16 which is formed with two slots 17 that are identical and op posed. At the top, the sleeve 3 terminates in an annular flange 18 which extends radially and engages the surface of the floor. The rod 2 remains housed but axially displaceable in the assembly formed by the cylindrical casing 1 and the sleeve 3, the rod having a transverse bore 19 in its lower part to carry a pin 20 which has end parts 21 projecting a little beyond the surfaces of the rod. This arrangement enables the red 2 to be placed in two positions, that is to say a retracted position in which the parts 21 en gage the bottom edge of the tubular section 16, and an extended position in which the end parts 21 of the rod are received by the slots 17. A slot 22 fonned in the top of the rod 2 facilitates turning of the rod from one posi tion to the other. Thus, in operation of the device, the rod 2 can readily be turned in the direction of the arrows shown in Figure 3, and so moved from its unobtrusive retracted position to the extended position (10) where it provides a safe anchorage for fastening the door 14 in its closed position by means of the padlock 15. WHAT I CLAIM IS:

1. A retractable anchoring device for enabling a locking member to fasten a door or the like to the device, which device comprises: (i) a generally cylindrical casing suitable to be securely buried in a floor with an open upper end substantially flush with the surface of the floor, the casing having a tapped inner face; (ii) a sleeve fitting within at least the upper part of the casing and retained therein by engagement of an external screw thread in said tapped face of the casing; (iii) a rod mounted within the sleeve so as to be axially displaceable between an ex tended operative position and an inoperative position wherein it is retracted within the casing, the red having (a) in its upper portion which projects (in the extended position) beyond the sleeve and casing, a transverse bore for receiving a locking member to fasten the door or the like, and (b) on its lower portion which is always within the casing, projecting means which cooperates with said sleeve so as to retain the rod in its extended or retracted position, in accordance with the rotation of the rod be- tween two radial positions and (iv) within the base of the casing, a coil spring which urges the rod toward its extended position.

2. A device as claimed in Claim 1, wherein the sleeve has two opposed longitudinal slots which extend axially, and the said projecting means on the rod is a pin held in a second bore, in the lower portion of the rod, the ends of the pin being capable of being placed by radial rotation of the rod (a) in said slots to allow the rod to be urged to its extended position or (b) engaged with the lower end of the sleeve so as to retain the rod in its retracted position.

3. A device according to any preceding claim, in which a slot is formed in the. outer end of said rod to facilitate said rotation the rod.

4. A device as claimed in any preceding claim, which includes a post at the base of the casing axially beneath said rod, the post serving to retain the coil spring.

5. A device as claimed in any pceceing claim, wherein the ooil spring fits into a recess within the base of the rod.

6. An anchoring device for doors or the like, substantially as hereinbefore described with reference to the accompanying drawings.