Mind Mapping & Creative Thinking

January 4, 2008

Knockdown Fittings (KD Fittings)

Filed under: Design Technology — Editor @ 7:28 pm

Knockdown (KD) fittings are mainly used to assemble flat pack furniture or for assembly by the user. They are used within kitchen units or self-assembly furniture. Knockdown (KD) fittings are often plastic fittings which can be joined together with one screw or bolt. A simple knock down fitting is a ‘block joint’. Block joints are simply plastic blocks that take screws in different directions.

Knockdown fittings are those that can be put together easily, normally using only a screw driver, a drill, a mallet/hammer and other basic tools. They are temporary joints although many are used to permanently join together items such as cabinets and other pieces of furniture that are purchased in a flat pack from such stores as Argos and Ikea.

PLASTIC CORNER BLOCK (FIX IT BLOCKS)

The corner block is pressed against the two pieces of material (normally timber based). Screws are used to fix the block into position. This type of joint is used to fit modern cabinets such as those found in a kitchen or bathroom. It is a relatively strong joint although it has the advantage that it can be dismantled using a screwdriver.

NATURAL WOOD FITTING (SQUARE SECTION BATTEN)

A piece of material such as softwood or hardwood can be drilled and screws can be passed through these holes. This gives a cost-effective knockdown joint. The screws are normally countersunk into the knockdown fitting.

TWO BLOCK FITTING

These are made from plastic. A bolt passes through the first fitting into the thread of the second. As the bolt is tightened it draws the two fittings together. The pins help keep the fitting straight. This gives a very strong joint and it can be dismantled using a screwdriver.

RIGID JOINT

These are normally moulded in plastic which makes them strong. Screws pass through the four holes which hold the sides at each corner firmly together.

SCAN FITTINGS

These are strong enough to be either permanent or temporary joints. The cylinder is inserted into the first side of a cabinet in a pre-drilled hole. The screw is then pushed through the hole in the second side until it meets the cylinder. It can then be tightened with a screw driver until both sides of the cabinet pull together. These are frequently used for table and bed frames.

CAM LOCKS

The disk fits into a recess in the first side of the cabinet. It rotates by inserting a screwdriver into the slot in its side. The shaft is screwed into the second side of the cabinet.

The collar of the shaft is passed through the hole in the second slot in the disk. When the disk rotates the shaft is locked in position. This keeps both sides of the cabinet locked together.

In order to see how these work you will need to look carefully at the pictures.

If you can use all this then you will be in with a very good chance of getting some excellent marks.

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1 Comment »

  1. hi slightly confused by your comment: to which pictures are talking about? Thanks

    Comment by Editor — March 20, 2009 @ 5:07 am


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