WO2024149647A1

WO2024149647A1 - A modular drum system for a roll up door and a method for arranging a modular drum system for a roll up door at a door hole in a wall

Info

Publication number: WO2024149647A1
Application number: PCT/EP2024/050078
Authority: WO
Inventors: Ralph EIKELENBERG; Patrik SCHOONJANS; Piet STEVENS; Els DE DECKER; Lucas DE TROYER; Bram TILLEY; Robin VAN DYCK
Original assignee: Assa Abloy Entrance Systems Ab
Priority date: 2023-01-10
Filing date: 2024-01-03
Publication date: 2024-07-18

Abstract

The disclosure relates to a modular drum system (1) for a roll up door (2) comprising a first drum part (3, 33) comprising a cylindrical body (5, 35), a first fitting geometry (6,36) at a first peripheral end of the cylindrical main body (5, 35), and a second fitting geometry (7, 37) at second peripheral end of the cylindrical body (5, 35); at least one second drum part (4, 34), wherein the second drum part is identical to the first drum part (3, 33), wherein the first fitting geometry (6,36) of the first drum part is adapted to fit the second fitting geometry (7, 37) of the second drum part (4, 34). The disclosure further relates to a method for arranging a modular drum system (1) for a roll up door (2) at a door hole in a wall.

Description

A modular drum system for a roll up door and a method for arranging a modular drum system for a roll up door at a door hole in a wall

Technical field

The present disclosure relates to a modular drum system for a roll up door and a method for arranging a modular drum system for a roll up door at a door hole in a wall. More specifically, the disclosure relates to a modular drum system for a roll up door and a method for arranging a modular drum system for a roll up door at a door hole in a wall as defined in the introductory parts of the independent claims.

Background art

In a typical High Speed Roll Up Door the roll up drum arranged to roll the door sheet or sections consists of long profile shapes in roll formed sheet metal or extruded material. The length of the tube is approximately the same as the door daylight width, which can be over 12 meters wide.

Generally, this type of doors are made-to-measure and the profiles are cut to length from standard length profiles according to the desired width of the door that is to be installed.

However, the long profiles of which the drums are constructed pose several challenges to the manufacturer, transporter and installer. It is expensive to transport such long objects and if the length is not correct it might be impossible to remedy and a new drum may have to be manufactured with large extra costs as a result. The large drums are also large and cumbersome to handle for the installer making the installation process demanding and expensive.

The long tube of which the drum is made of has several disadvantages.

Long parts are difficult to move around leading to expensive material handling costs.

Further, the profiles are cut from standard length stock pieces. Cut-off pieces below 2 meters of length typically cannot be re-used because they are shorter than the general door width. This generates a lot of waste material.

The packaging and shipping size pose problems. Products are packed on custom pallets or racks of several meters length for shipping to the customer installation site, making the shipment very expensive. Even for replacing a single part specialized packaging and/or transport might be required.

Repairs of an installed door is also problematic due to the long drum lengths. Even for small defects or damages a large part needs to be replaced. This leads to a waste of raw material resources.

There is thus a need for improvements in the industry of roll up doors and the drums of the doors.

It is an object of the present disclosure to mitigate, alleviate or eliminate one or more of the above-identified deficiencies and disadvantages in the prior art and solve at least the above mentioned problem. According to a first aspect there is provided a modular drum system for a roll up door comprising a first drum part comprising a cylindrical body, a first fitting geometry at a first peripheral end of the cylindrical main body, and a second fitting geometry at second peripheral end of the cylindrical body. The system further comprises at least one second drum part, wherein the second drum part is identical to the first drum part, and wherein the first fitting geometry of the first drum part is adapted to fit the second fitting geometry of the second drum part.

The problems of the prior art are thereby solved. The drum can be assembled on site by as many first and second parts as needed for the specific door. Transportation of the parts are simple. The parts could be as shorts as 0.5 m and can thereby easily be stacked on normal pallets. Cutting waste is greatly reduced as the cut-off part is always below the length of the section parts, e.g. 0.5 m. The cut-off piece can also be used for another drum to even further reduce the waste. The smaller cut-off parts make it easier to keep an inventory for re-use.

Fitting geometry means that the geometry is adapted to fit with a corresponding geometry, e.g. as in a plug and socket solution. In this case, as outlined above, the first fitting geometry of the first side post part is adapted to fit the second fitting geometry of the second side post part so that the slit of the first side post part continues uninterrupted to the second side post part.

Also when it comes to repairs of an installed door the problems of the prior art are addressed. A repair will consume less material as only the damaged section(s) need to be replaced replace, not the full length profile, resulting in waste reduction. Smaller part length makes for easier material handling during repairs. Smaller part length also reduce transport weight and volume for the repair team. All repair pieces will fit a standard maintenance van simplifying repair work vastly and reducing costs. Maintenance crews can also keep a stock of modular pieces for urgent repairs which was not possible before.

When the parts are mounted to each other to form the modular drum system and the modular drum system is in place in the door, the parts can substantially not move in the length direction of the drum as the drum is mounted between two side posts of the roll up door.

According to some embodiments, the first fitting geometry is a male fitting geometry, and the second fitting geometry is a female fitting geometry. In that way the pieces of the drum can be assembled together in a simple manner by stacking as many pieces as necessary in the length direction of the built drum.

According to some embodiments, the female fitting geometry extends through substantially the entire cylindrical body. An advantage of this embodiment is that the last piece (or first piece) of the modular drum system could be cut to fit the correct width of the door without affecting the female fitting geometry.

According to some embodiments, the first fitting geometry and the second fitting geometry are arranged to lockingly engage with one another when connected. An advantage of this embodiment is that the parts do not move relative each other during operation, reducing wear and service needs.

According to some embodiments, the first fitting geometry comprises groves grooves and the second fitting geometry comprises corresponding protrusions to form a locking engagement so that the first drum part and the second drum part cannot rotate relative to each other. This is advantageous since the drum is intended to roll up a door sheet or door segments. It is thus advantageous that the drum rotates as one entity.

When the parts are mounted to each other to form the modular drum system and the modular drum system is in place in the door, the parts can substantially not move in the length direction of the drum as the drum is mounted between two side posts of the roll up door. It is thereby not necessary to fixate the drum parts to each other. According to some embodiments, the modular drum system comprises a telescopic end piece the drum comprises a male extendible fitting geometry that is extendible to adjust the length of the end piece. The telescopic function makes it unnecessary to cut the last drum part in the modular drum system and no waste is produced.

According to some embodiments, the modular drum system comprises a support flange arranged to be put around the telescopic part to extend the diameter to the full diameter of the main body so as to be able to support a curtain of the high speed roll up door. An advantage with the support flange is that the telescopic extendable part, which by nature needs to have a smaller diameter than the main body of the drum part, so that a door sheet will be equally supported on the drum also at the telescopic part. The support flanges could come in different lengths. The installing technician installing the roll up door can mount as many support flanges as is needed on the telescopic part to get support for the door sheet or door sections.

According to some embodiments, the modular drum system comprises a connection part comprising a third fitting geometry and a fourth fitting geometry, wherein the third fitting geometry is arranged to engage the first fitting geometry of the first drum part; and the fourth fitting geometry is arranged to engage the second fitting geometry of the second drum part. According to some embodiments, the connection piece comprises a central flange separating the third fitting geometry and the fourth fitting geometry. It makes the pieces easier to assemble because it acts as a "stopper" when the connection piece is inserted so that the connector cannot be pushed in too deep and any holes for screws / rivets will be properly aligned. According to some embodiments, the first fitting geometry and the second fitting geometry are identical to each other and the third fitting geometry and the fourth fitting geometry are identical to each other.

An advantage of using connection pieces is that that the first fitting geometry of the first drum part and the second drum part and the second fitting geometry of the first drum part and the second part drum part can both be identical and the main body, being cylindrical, can form both the first fitting geometry and the second fitting geometry where they are both identical.

According to some embodiments, the first fitting geometry and the second fitting geometry are both female fitting geometries and the third fitting geometry and the fourth fitting geometry are both male fitting geometries. Alternatively the first fitting geometry and the second fitting geometry are both male fitting geometries and the third fitting geometry and the fourth fitting geometry are both female fitting geometries.

According to some embodiments, the modular drum system comprises end cap pieces to connect the drum to the roll up door. When the cap pieces are connected to the roll up door between a side post on either side of the drum, the drum parts cannot substantially move in the length direction of the modular drum system.

According to some embodiments, the modular drum system comprises fixation means arranged to fixate plural or all parts of the modular drum system to each other, wherein the fixation means is comprised in the group consisting of: glue, screws, rivets, central rod arranged to pull parts together, central cable arranged to pull parts together, snap connection, and threads. This will securely fasten all parts of the modular drum system to each other effectively stop any movement between the parts which will further reduce wear of the parts leading to reduced service needs of the drum.

According to a second aspect there is provided a method for arranging a modular drum system for a roll up door at a door hole in a wall comprising arranging at the top of the door hole a first drum part comprising a cylindrical body, a first fitting geometry at a first peripheral end of the cylindrical main body, and a second fitting geometry at second peripheral end of the cylindrical body ; arranging adjacent the cylindrical body at least one second drum part, wherein the second drum part is identical to the first drum part, aligning the first fitting geometry of the first drum part to fit the second fitting geometry of the second drum part.

According to some embodiments, the method comprises arranging end cap pieces to the periphery of the modular drum system for enabling connection of the drum to the roll up door; mounting the drum to the roll up door by connecting the end pieces of the modular drum system to the roll up door.

Effects and features of the second aspect are to a large extent analogous to those described above in connection with the first aspect. Embodiments mentioned in relation to the first aspect are largely compatible with the the second aspect.

The present disclosure will become apparent from the detailed description given below. The detailed description and specific examples disclose preferred embodiments of the disclosure by way of illustration only. Those skilled in the art understand from guidance in the detailed description that changes and modifications may be made within the scope of the disclosure. Hence, it is to be understood that the herein disclosed disclosure is not limited to the particular component parts of the device described or steps of the methods described since such device and method may vary. It is also to be understood that the terminology used herein is for purpose of describing particular embodiments only, and is not intended to be limiting. It should be noted that, as used in the specification and the appended claim, the articles "a", "an", "the", and "said" are intended to mean that there are one or more of the elements unless the context explicitly dictates otherwise. Thus, for example, reference to "a unit" or "the unit" may include several devices, and the like. Furthermore, the words "comprising", "including", "containing" and similar wordings does not exclude other elements or steps.

Brief descriptions of the drawings

The above objects, as well as additional objects, features and advantages of the present disclosure, will be more fully appreciated by reference to the following illustrative and non-limiting detailed description of example embodiments of the present disclosure, when taken in conjunction with the accompanying drawings.

Figure 1 shows a perspective view of a roll up door with side posts and the modular drum system according to an embodiment of the present disclosure.

Figure 2 shows of the modular drum system according to an embodiment of this disclosure.

Figure 3 shows of the modular drum system according to a further embodiment of this disclosure.

Figure 4 shows of the modular drum system according to an embodiment of this disclosure where an end part is telescopic. Figure 5 shows of the modular drum system according to a further embodiment of this disclosure with a central rod as male fitting geometry.

Figure 6 is a block diagram showing the method according to the present disclosure.

Detailed description

The present disclosure will now be described with reference to the accompanying drawings, in which preferred example embodiments of the disclosure are shown. The disclosure may, however, be embodied in other forms and should not be construed as limited to the herein disclosed embodiments. The disclosed embodiments are provided to fully convey the scope of the disclosure to the skilled person.

With reference to Figures 1, 2 and 3, the first aspect of this disclosure shows a modular drum system 1 for a roll up door 2 comprising a first drum part 3,33 comprising a cylindrical body 5,35, a first fitting geometry 6,36 at a first peripheral end of the cylindrical main body 5,35, and a second fitting geometry 7,37 at second peripheral end of the cylindrical body 5,35; at least one second drum part 4,34, wherein the second drum part is identical to the first drum part 3,33, wherein the first fitting geometry 6,36 of the first drum part is adapted to fit the second fitting geometry 7,37 of the second drum part 4,34.

As seen in the embodiment shown in Figure 1, the first fitting geometry 6 of the first drum part and second drum part is a male fitting geometry, and the second fitting geometry 7 of the first drum part and second drum part is a female fitting geometry. The female fitting geometry 7 extends through substantially the entire cylindrical body. In Figure 1 the locking connection is achieved by the first fitting geometry comprising grooves 8. The second fitting geometry comprises corresponding protrusions 9 to form a locking engagement so that the first drum part 3 and the second drum part 4 cannot rotate relative to each other.

The modular drum system 1 can be assembled on site by as many first and second parts as needed for the specific door. Transportation of the parts are simple. The parts could be as shorts as 0.5 m and can thereby easily be stacked on normal pallets. Cutting waste is greatly reduced as the cut-off part is always below the length of the section parts, e.g. 0.5 m. The cut-off piece can also be used for another drum to even further reduce the waste. The smaller cut-off parts make it easier to keep an inventory for re-use. Also when it comes to repairs of an installed door the problems of the prior art are addressed. A repair will consume less material as only the damaged section(s) need to be replaced replace, not the full length profile, resulting in waste reduction. Smaller part length makes for easier material handling during repairs. Smaller part length also reduce transport weight and volume for the repair team. All repair pieces will fit a standard maintenance van simplifying repair work vastly and reducing costs. Maintenance crews can also keep a stock of modular pieces for urgent repairs which was not possible before.

When the parts are mounted to each other to form the modular drum system and the modular drum system is in place in the door 2, the parts can substantially not move in the length direction of the drum as the drum is mounted between two side posts of the roll up door, as seen in Figure 1.

However, the parts could be securely fixated by fixation means (not shown) arranged to fixate plural or all parts of the modular drum system to each other. The fixation means (not shown) could be glue, screws, rivets, central rod arranged to pull parts together, central cable arranged to pull parts together, snap connection, or threads to securely fasten all parts of the modular drum system to each other and effectively stop any movement between the parts of the modular drum system.

In the embodiments of Figure 3 the modular drum system comprises a connection piece 31 comprising a third fitting geometry 38 and a fourth fitting geometry 39, wherein the third fitting geometry 38 arranged to engage the first fitting geometry 36 of the first drum part 33; and the fourth fitting geometry 39 is arranged to engage the second fitting geometry 37 of the second drum part 34. The connection piece 31 comprises central flange 30 separating the third fitting geometry 38 and the fourth fitting geometry 39. The first fitting geometry 36 and the second fitting geometry 37 are identical to each other and the third fitting geometry 38 and the fourth fitting geometry 39 are identical to each other. In Figure 3 the first fitting geometry 36 and the second fitting geometry 37 are both female fitting geometries and the third fitting geometry 38 and the fourth fitting geometry 39 are both male fitting geometries. However, it is also possible to have a female connection piece. Using connection pieces 31 simplifies the first drum part 33 and the second drum parts 34 as they can be made as uniform cylindrical profiles as shown in Figure 3. As further shown in Figure 3 the modular drum system comprises end cap pieces 32 to connect the drum to the roll up door. The cap pieces are connected to the roll up door between one side post on either side of the drum, as shown in Figure 1, so that the drum parts cannot substantially move, in the length direction of the modular drum system.

With reference to Figure 4, an embodiment is shown where the modular drum system comprises a telescopic end piece 41 the drum comprises a male extendible fitting geometry 46 that is extendible to adjust the length of the end piece. In that way the last drum part does not have to be cut to the width of the door, but may instead be adjusted in length to fit. To support the door sheet when rolling it up on the modular drum system, support flanges 48 can be arranged around the telescopic part to extend the diameter to the full diameter of the main body.

Figure 5 shows an embodiment of the modular drum system with a central rod 56 as male fitting geometry attached to the first drum part 51 by fixation means 52, The fixation means 52 are in the embodiment of Figure 5 rivets or screws. The fitting geometry of the central rod 56 is in Figure 5 square, but could have any cross section but circular. In that way the fixation means 52 will not have to absorb rotational forces providing a more robust construction with less maintenance needs. The fixation means will then only serve to fasten the central rod to the first drum part 51 and the second drum part 54.

With reference to Figure 6, the second aspect of this disclosure shows a method for arranging a modular drum system for a roll up door 2 at a door hole in a wall comprising arranging SI at the top of the door hole a first drum part 3,33 comprising a cylindrical body 5,35, a first fitting geometry 6,36 at a first peripheral end of the cylindrical main body 5,35, and a second fitting geometry 7,37 at second peripheral end of the cylindrical body 5,35. At least one second drum part 4,34 is arranged S2 adjacent the cylindrical body 5,35, wherein the second drum part is identical to the first drum part 3,33. The first fitting geometry 6,36 of the first drum part is then aligned S3 to fit the second fitting geometry 7,37 of the second drum part 4,34.

End cap pieces 32 are arranged S4 to the periphery of the modular drum system 1 for enabling connection of the drum to the roll up door and the drum is mounted S5 to the roll up door by connecting the end pieces of the modular drum system to the roll up door so that the modular drum system is positioned as shown in Figure 1.

Exemplary modular drum systems, and methods are set out in the following items. 1. A modular drum system (1) for a roll up door (2) comprising a first drum part (3, 33) comprising a cylindrical body (5, 35), a first fitting geometry (6, 36) at a first peripheral end of the cylindrical main body (5, 35), and a second fitting geometry (7, 37) at second peripheral end of the cylindrical body (5, 35); at least one second drum part (4, 34), wherein the second drum part is identical to the first drum part (3, 33), wherein the first fitting geometry (6, 36) of the first drum part is adapted to fit the second fitting geometry (7, 37) of the second drum part (4, 34).

2. The modular drum system according to item 1, wherein the first fitting geometry (6) is a male fitting geometry, and the second fitting geometry (7) is an female fitting geometry.

3. The modular drum system according to item 2, wherein the female fitting geometry (7) extends through substantially the entire cylindrical body.

4. The modular drum system according to any one of the preceding items, wherein the first fitting geometry and the second fitting geometry are arranged to lockingly engage with one another when connected. 5. The modular drum system according to any one of the preceding items, wherein the first fitting geometry comprises groves grooves (8) and the second fitting geometry comprises corresponding protrusions (9) to form a locking engagement so that the first drum part (3) and the second drum part (4) cannot rotate relative to each other.

6. The modular drum system according to any one of the preceding items, further comprising a telescopic end piece (41) comprising a male extendible fitting geometry (46) that is extendible to adjust the length of the end piece.

7. The modular drum system according to item 6, further comprising a support flange (48) arranged to be put around the telescopic part to extend the diameter to the full diameter of the main body so as to be able to support a curtain of the high speed roll up door.

8. The modular drum system according to item 1, further comprising a connection piece (31) comprising a third fitting geometry (38) and a fourth fitting geometry (39), wherein the third fitting geometry (38) is arranged to engage the first fitting geometry (36) of the first drum part (33); and the fourth fitting geometry (39) is arranged to engage the second fitting geometry (37) of the second drum part (34).

9. The modular drum system according to item 8, wherein the connection piece

(31) comprises central flange (30) separating the third fitting geometry (38) and the fourth fitting geometry (39).

10. The modular drum system according to item 8, wherein the first fitting geometry (36) and the second fitting geometry (37) are identical to each other and the third fitting geometry (38) and the fourth fitting geometry (39) are identical to each other.

11. The modular drum system according to item 8 or item 9, wherein the first fitting geometry (36) and the second fitting geometry (37) are both female fitting geometries and the third fitting geometry (38) and the fourth fitting geometry (39) are both male fitting geometries and vice versa.

12. The modular drum system according to any one of the preceding items, further comprising end cap pieces (32) to connect the drum to the roll up door.

13. The modular drum system according to any one of the preceding items, further comprising fixation means arranged to fixate plural or all parts of the modular drum system to each other, wherein the fixation means is comprised in the group consisting of: glue, screws, rivets, central rod arranged to pull parts together, central cable arranged to pull parts together, snap connection, and threads. 14. A method for arranging a modular drum system (1) for a roll up door (2) at a door hole in a wall comprising arranging (SI) at the top of the door hole a first drum part (3, 33) comprising a cylindrical body (5, 35), a first fitting geometry (6, 36) at a first peripheral end of the cylindrical main body (5, 35), and a second fitting geometry (7, 37) at second peripheral end of the cylindrical body (5, 35); arranging (S2) adjacent the cylindrical body (5, 35) at least one second drum part (4, 34), wherein the second drum part is identical to the first drum part (3, 33), aligning (S3) the first fitting geometry (6, 36) of the first drum part to fit the second fitting geometry (7, 37) of the second drum part (4, 34).

15. The method according to item 14, further comprising arranging (S4) end cap pieces (32) to the periphery of the modular drum system (1) for enabling connection of the drum to the roll up door; mounting (S5) the drum to the roll up door by connecting the end pieces of the modular drum system to the roll up door.

The person skilled in the art realizes that the present disclosure is not limited to the preferred embodiments described above. The person skilled in the art further realizes that modifications and variations are possible within the scope of the appended claims. Additionally, variations to the disclosed embodiments can be understood and effected by the skilled person in practicing the claimed disclosure, from a study of the drawings, the disclosure, and the appended claims.

Claims

1. A modular drum system (1) for a roll up door (2) comprising a first drum part (3, 33) comprising a cylindrical body (5, 35), a first fitting geometry (6, 36) at a first peripheral end of the cylindrical main body (5, 35), and a second fitting geometry (7, 37) at second peripheral end of the cylindrical body (5, 35); at least one second drum part (4, 34), wherein the second drum part is identical to the first drum part (3, 33), wherein the first fitting geometry (6, 36) of the first drum part is adapted to fit the second fitting geometry (7, 37) of the second drum part (4, 34).

2. The modular drum system according to claim 1, wherein the first fitting geometry (6) is a male fitting geometry, and the second fitting geometry (7) is an female fitting geometry.

3. The modular drum system according to claim 2, wherein the female fitting geometry (7) extends through substantially the entire cylindrical body.

4. The modular drum system according to any one of the preceding claims, wherein the first fitting geometry and the second fitting geometry are shaped with protrusions (56) and corresponding respective recesses (57) arranged to lockingly engage with one another when connected.

5. The modular drum system according to any one of the preceding claims, wherein the first fitting geometry comprises groves grooves (8) and the second fitting geometry comprises corresponding protrusions (9) to form a locking engagement so that the first drum part (3) and the second drum part (4) cannot rotate relative to each other.

6. The modular drum system according to any one of the preceding claims, further comprising a telescopic end piece (41) comprising a male extendible fitting geometry (46) that is extendible to adjust the length of the end piece.

7. The modular drum system according to claim 6, further comprising a support flange (48) arranged to be put around the telescopic part to extend the diameter to the full diameter of the main body so as to be able to support a curtain of the high speed roll up door.

8. The modular drum system according to claim 1, further comprising a connection piece (31) comprising a third fitting geometry (38) and a fourth fitting geometry (39), wherein the third fitting geometry (38) is arranged to engage the first fitting geometry (36) of the first drum part (33); and the fourth fitting geometry (39) is arranged to engage the second fitting geometry (37) of the second drum part (34).

9. The modular drum system according to claim 8, wherein the connection piece (31) comprises central flange (30) separating the third fitting geometry (38) and the fourth fitting geometry (39).

10. The modular drum system according to claim 8, wherein the first fitting geometry (36) and the second fitting geometry (37) are identical to each other and the third fitting geometry (38) and the fourth fitting geometry (39) are identical to each other.

11. The modular drum system according to claim 8 or claim 9, wherein the first fitting geometry (36) and the second fitting geometry (37) are both female fitting geometries and the third fitting geometry (38) and the fourth fitting geometry (39) are both male fitting geometries. [And vice versa]

12. The modular drum system according to any one of the preceding claims, further comprising end cap pieces (32) to connect the drum to the roll up door.

13. The modular drum system according to any one of the preceding claims, further comprising fixation means arranged to fixate plural or all parts of the modular drum system to each other, wherein the fixation means is comprised in the group consisting of: glue, screws, rivets, central rod arranged to pull parts together, central cable arranged to pull parts together, snap connection, and threads.

14. A method for arranging a modular drum system (1) for a roll up door (2) at a door hole in a wall comprising arranging (SI) at the top of the door hole a first drum part (3, 33) comprising a cylindrical body (5, 35), a first fitting geometry (6, 36) at a first peripheral end of the cylindrical main body (5, 35), and a second fitting geometry (7, 37) at second peripheral end of the cylindrical body (5, 35); arranging (S2) adjacent the cylindrical body (5, 35) at least one second drum part (4, 34), wherein the second drum part is identical to the first drum part (3, 33), aligning (S3) the first fitting geometry (6, 36) of the first drum part to fit the second fitting geometry (7, 37) of the second drum part (4, 34).

15. The method according to claim 14, further comprising arranging (S4) end cap pieces (32) to the periphery of the modular drum system

(1) for enabling connection of the drum to the roll up door; mounting (S5) the drum to the roll up door by connecting the end pieces of the modular drum system to the roll up door.