GB2460904A

GB2460904A - Pedal operated door jack

Info

Publication number: GB2460904A
Application number: GB0812168A
Authority: GB
Inventors: Laurence Cairns
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-06-18
Filing date: 2008-07-03
Publication date: 2009-12-23
Anticipated expiration: 2028-07-03
Also published as: GB2460904B; GB0811122D0; GB0812168D0

Abstract

A door jack include a base 1 upon which is mounted a support post 9 along which the jacking components including a lifting platform 3 can move, guided by a guide post 4 also mounted on the base 1, the jack being operated by a pedal 2 and including a kick lip for manoeuvring a door lifted by the jack and a cross mounted tab or lever 5 for lowering the platform 3. The tab 5 and/or an elevator block 6 frictionally engage the support post to maintain the raised position of the platform 3. Support post 9 and guide post 4 may be vertical, parallel and both joined and stabilised by load bearing bar 10 to form an inverted U shape. A toe 11 may be provided to prevent the jack from tipping when laden.

Description

Door Jacking Device.

An improved door jack device has now been devised.

This invention relates to a door jacking device which is intended to allow a joiner or workman to fit a hinged door into an architrave without the requirement of help from any other person. It is reasonable easy for one person to fit a light weight door into a architrave without help from another load-bearing person but the situation is very different when a hardwood, outside door or a glass door is to be fitted because in this case it is not possible for one person to sustain the door weight, direct it into the architrave, and with the other hand fit the screws into the previously prepared holes in the wooden or metal frame.

There is a need therefore for a device which can carry the weight of a door and at the same time delicately elevate it into a position in line with the lintel of the architrave so that it can be slid into a position where the hinges can be screwed into the door frame.

Such a device is the subject of the present invention where there is provided, a door jacking device, comprising a foot operated lifting platform which can initially be accommodated under the bottom rail of a door, when it is approximately at right angles to the lintel, and which can then be elevated to an exact position where the top of the door is in alignment with the bottom of the lintel so that the door can be slid into contact with the frame and afterwards secured with screws without the requirement of load-bearing help from another person and where the exact adjustment is obtained by the foot action on either the lifting platform plate or the toe action on the lowering tap.

The door jacking device can also be used to elevate wrought iron gates or plasterboard in to position as well as heavy doors.

A specific embodiment of the invention will now, be described by way of example with reference to the accompanying drawing in which:-Figure 1 is a perspective view of a foot actuated jacking device according to the invention and Figure 2 is a partial cut away view of the device shown in Figure 1.

Referring to the two drawings, the jacking device comprises a body with a base 1 to which is fixed at 90 degrees, an inverted U-shaped bar, guide post 4 (stabilizing and load bearing bar 10) and support post 9 on which travels, by inching upward movement, a lifting platform 3. The support post 9 and guide post 4 go through holes 16 on base 1 and is fixed within the base 1 at the bottom and left flush on base 1, after the lifting mechanism is assembled within the U shaped bar, 4, 10 and 9 (before fixing to base 1).

Guide post 4 is attached on to support post 9 by stabilizing and load bearing bar 10 and goes through guide holes 14 in top member 20 and bottom member 19 which are attached on to platform 3 and is required so that platform 3 will not jam on support post 9 when caring a heavy load.

Stabilizing and load bearing bar 10 is attached between guide post 4 and support post 9, and is required to facilitate the stabilizing of the doorjacking device when lifting a heavy door or load on platform 3 and prevents support post 9 and guide post 4 from moving from there parallel positions.

Support post 9, which has the lifting mechanism assembled on it, is required for the lifting of platform 3 and goes through tab 5 biasing spring 13, hole 22 on top member 20, elevator block 6, compression spring 7, hole 22 on bottom member 19, and through hole 16 on base 1 where it is fixed.

The door jacking device is provided with a base 1 so that the device is self supporting.

The lifting of platform 3 is accomplished on the metal support post 9 by means of a drive pedal 2 provided with lever arms 12 which is hinged on pin point 18 to the anchor hinge wings 17 by hinge pin 8. The drive pedal 2 rests on elevator block 6 that support post 9 goes through. A compression spring 7 is provided about support post 9 below elevator block 6 such that when foot effort is applied to actuate the pedal 2 and hinge lever arms 12 that are attached to hinge point 18 by hinge pin 8, the elevator block 6 is biting into support post 9 and the distal ends of lever arm 12 levers up the lifting platform 3 by a sliding movement on the support post 9 and guide post 4.

Hinge pin 8 goes through pedal arms 12 and anchor hinge wings 17 on top member 20 that hinges and joins the pedal 2 to platform 3 and hinge pin 8 is secured at each end.

The lowering of platform 3 is accomplished by a foot releasable retaining tab 5 that is mounted on the support post 9 and held in place by lug 15 on top member 20 in the upward cantilever position by means of a biasing spring 13. A central aperture in the retaining tab 5 through which the support post 9 passes, and because the retaining tab is normally biased to the upward cantilevered position by spring 13, the retaining tab 5 is free to move upwards to any desired position, but immediately locks, by biting into the surface of the support post 9, when force acts to try to push it downwards on the support post 9. This locked position of the retaining tab 5 on the support post can be released at any time by downward toe pressure on the retaining tab 5.

As lifting platform 3 moves up support post 9 and guide post 4. Retaining tab 5 is also correspondingly forced up support post 9, where as elevator block 6 temporarily remains in place (biting into support post 9) in a similar manner to the biting engagement described above for the retaining tab 5, whilst pedal 2 remains depressed. When pedal 2 is released, spring 7 forces elevator block 6 upwardly on support post 9 by the compression spring 7 and also pedal 2 that resting on elevator block 6. Once again platform 3 rests on retaining tab 5.

By judicious use of pedal 2 and the release mechanism of the retaining tab 5 it is relatively straightforward to position the lifting platform 3 at any point and can operate fine adjustment (up or down) on the support post 9 and guide post 4 and it is this facility which allows a lone fitter to accurately place a heavy door so that it can be slid into the architrave and screw fixed, likewise a wrought iron gate or plaster board.

Retaining tab 5, that support post 9 goes through is in a cross-mounted position to the pedal 2 and the end section 23 of tab 5 goes through the hole 24 in lug 15 on top member 20, so that the operators foot on the pedal 2 will not foul the acquired raising of platform 3, but the operator still has easy excess to tab 5 for the lowering of platform 3 when required.

Toe 11 of base 1, is a continuation of base 1 and is provided to prevent the loaded device from tilting over.

When platform 3, is fully in the downward position, platform 3 is level with toe 11 as shown on Figure 1, so that the door jacking device can be used for the minimum of height when lifting and hinging heavy door or wrought iron gates.

It should be noted that kick lip 21, is a continuation of platform 1 which is required so that the fitter, of a door or a wrought iron gate can gently tap into place the whole apparatus, with his foot and is required if more force is needed.

Platform 3 can travel the full length of support post 9 and guide post 4 at 90 degrees from the base 1 when lifting a door or wrought iron gate and remain parallel with base 1 at any height.

Claims

CLAIMS1. A door jacking device comprises a lifting component arranged to be place able under the bottom of a door to be installed, whilst the door is with in its architrave frame, and thereafter elevate able within the frame by pedal action so that the hinges can be aligned with what is to be their fixed position on the doors architrave.
2. A door jacking device, according to Claim 1, wherein each step of the pedal 2 actuator raises the door to a desired height with on the architrave frame ready for screw fixing.
3. A door jacking device, according to any of the above claims, where in the pedal door jacking means can be progressively released so that the door can be incrementally raised into the required fitting position.
4. A door jacking device, according to claim 3, where in the drive pedal 2 is actuated by means of either foot action as required by the operator.
5. A door jacking device, according to any of the preceding claims, where in a support post 9 which carries the lifting platform 3 which can incrementally advance the platform 3 upwards vertical from base 1 to the desired position for fixing work and there afterwards hold this position by use of the retaining tab 5 which holds by biting of the surface of support post 9.
6. A door jacking device, according to any of the above claims, where in during fixing work the door is either supported by the pedal system's elevator block 6 biting into the support 9 or released by foot movement on tab 5.
7. A door jacking device, according to any of the above claims, where in the lifting element in the system is connected to both the pedal and the retaining means so that the weight of the door to be fitted is supported during the jacking movement by either the foot pedal 2 means or the retaining means.
8. A door jacking device, according to any of the claims where in the vertical stability of the jacked door, as yet not screw fitted, can be attained by the operation of the kick-lip 21 and is a continuation of base 1 as shown in Figure 2.
9. A door jacking device, according to any of the claims where in guide post 4 is parallel with support post 9 that platform 3 advances up and down vertical on is required that platform 3 will not jam on support post 9.
10. A door jacking device, according to any of the claims where in stabilizing and load bearing bar 10 is a continuation of support post 9 and guide post 4 and is required to hold and stabilize support post 9 and guide post 4 when platform 3 is advancing up or down support post 9 and guide post 4 with a load.
11. A door jacking device, according to any of the above claims where toe 11 is a continuation of base I as shown on Figure 1 and figure 2 and prevents the door jacking device from tilting over where lifting a heavy load.
12. A door jacking device, according to any of the above claims where platform 3 is fully in the down position as shown in Figure 1 is level with toe 11 so that the door jacking device can be used for the minimum height.
13. A door jacking device, according to any of the above claims where plafform 3 is connected to the foot pedal 2 by hinge pin 8.
14. A door jacking device, according to any of the above claims where guide post 4 and support post 9 are fixed vertically, on to the base 1 as shown on figure 1 and figure 2.
15. A door jacking device, according to any of the above claims where platform 3 advances up and down guide post 4 and support post 9 the full length vertically, from the base I and platform 3 remains parallel with base I at any height.
16. A door jacking device, according to any of the above claims where retaining tab 5 is in a cross-mounted position to pedal 2 that the operator's foot will not come in contact with tab 5 when pressing pedal 2, but the operator has easy excess to tab 5 when required to lower platform 3.Amendments to the claims have been filed as follows:AMENDED CLAIMSI. A door jacking device comprising of lifting and lowering components arranged on support post 9 and is guided by guide post 4 and these are stabilized by load bearing bar 10, and the U shaped bar is fixed to base 1, where platform 3 can be set at minimum height for placement under the bottom of the door, being installed, altered or removed whilst the door is with in its architrave frame, and there after elevate the door to the required height, vertical within the architrave frame by pedal action, and the use of the kick lip 21 is to line the door parallel with the architrave so that the hinges can be accurately positioned with in what is to be their fixed position on the door architrave and platform 3 is lowered by activating cross mounted tab 5.2. A door jacking device, according to Claim 1, wherein each step of the pedal 2 actuator raises the door to a desired height with in the architrave frame ready for screw fixing.3. A door jacking device, according to any of the above claims, where in the pedal door jacking means can be progressively released so that the door can be incrementally raised into the required fitting position.4. A door jacking device, according to claim 3, where in the drive pedal 2 is actuated by means of either foot action as required by the operator.* 5. A door jacking device, according to any of the preceding claims, where in a support post 9 which carries the lifting platform 3 which can incrementally advance the * .:.. platform 3 upwards vertical from base 1 to the desired position for fixing work and there afterwards hold this position by use of the retaining tab 5 which holds by biting of the surface of support post 9.SS* . A door jacking device, according to any of the above claims, where in during fixing * : work the door is either supported by the pedal system's elevator block 6 biting into the support 9 or released by foot movement on tab 5.7. A door jacking device, according to any of the above claims, where in the lifting element in the system is connected to both the pedal and the retaining means so that the weight of the door to be fitted is supported during the jacking movement by either the foot pedal 2 means or the retaining means.8. A door jacking device, according to any of the above claims where in the vertical stability of the jacked door, as yet not screw fitted, can be attained by the operation of the kick-lip 21 and is a continuation of base 1 as shown in Figure 2.9. A door jacking device, according to any of the above claims where in guide post 4 is parallel with support post 9 that platform 3 advances up and down vertical on is required that platform 3 will not jam on support post 9.1 0.A door jacking device, according to any of the above claims where in stabilizing and load bearing bar 10 is a continuation of support post 9 and guide post 4 and is required to hold and stabilize support post 9 and guide post 4 when platform 3 is advancing up or down support post 9 and guide post 4 with a load.11.A door jacking device, according to any of the above claims where toe 11 is a continuation of base 1 as shown on Figure 1 and figure 2 and prevents the door jacking device from tilting over where lifting a heavy load.12.A door jacking device, according to any of the above claims where platform 3 is fully in the down position as shown in Figure 1 is level with toe 11 so that the door jacking device can be used for the minimum height.13.A door jacking device, according to any of the above claims where platform 3 is connected to the foot pedal 2 by hinge pin 8.14.A door jacking device, according to any of the above claims where guide post 4 and * support post 9 are fixed vertically, on to the base 1 as shown on figure 1 and figure 2.I 5.A door jacking device, according to any of the above claims where platform 3 * :.. advances up and down guide post 4 and support post 9 the full length vertically, from the base 1 and platform 3 remains parallel with base 1 at any height. 6.A door jacking device, according to any of the above claims where retaining tab 5 is in * a cross-mounted position to pedal 2 that the operator's foot will not come in contact with tab 5 when pressing pedal 2, but the operator has easy excess to tab 5 when required to lower platform 3.