Max Co., Ltd.

Osamu Ebisawa

Takeo Fujiyama

Keijiro Murayama

Keishiro Murayama

In a linked-screw tightener in which linked screws held by a coupling belt at predetermined intervals is passed through a linked-screw guide passage provided near a leading end of and across a nose portion installed movably at the leading end of a linked-screw tightener body relative to a screwing direction, a foremost screw is fed into an open space between a pair of chuck pawls positioned in the substantially central part of the nose portion and capable of opening and closing in accordance with the movement of the nose portion relative to the linked-screw tightener body, and the supplied screw is driven with a driver bit, the screw guide unit includes: a foremost screw receiving port formed on the pair of chuck pawls wherein the foremost screw receiving port opens in the chuck pawls closing condition to allow the foremost screw to be fed into the open space between the pair of the chuck pawls; and a guide member disposed at the pair of the chuck pawls, for opening and closing the foremost receiving port to hold the foremost screw at the pair of the chuck pawls, wherein the guide member operates together the movement of the nose portion relative to the linked-screw tightener body.

Screw guide in linked-screw tightener

A drive link is coupled to an end of a ratchet wheel, and the other end of the drive link is slidably arranged in a guide hole formed in a side wall of a nose holder. The nose holder has a control plate rotatably attached to the other end of the drive link. The control plate is urged by a spring so as to engage with the other end of the drive link with such a strength as to temporarily stop the movement of the drive link when the drive link is in the course of retreating together with the nose portion. The other end of the drive link is designed to engage with a front end of the guide hole while the nose portion is in the course of advancing from a retreat end. By causing the ratchet wheel to make a forward/backward rotation based on stoppage of the drive link while the nose portion is in the course of retreating and while the nose portion is in the course of advancing, a feed wheel is rotated intermittently in a coupled screw feed direction.

Screw supply device for coupled screw tightening machine

A screw tightening machine is provided which comprises a main body 2 formed on an end of a grip 1, a nose 3 mounted on the forward part of the main body 2, and a magazine 5 for guiding and feeding a band in which evenly spaced screws 4b are fitted from the side of the grip 1 to the nose 3. The nose 3 moves relatively with respect to a direction in which a screw 4b is tightened. The screw 4b is driven out from the nose 3. An end of the magazine 5 is connected to the nose 3, and a part of the other end of the magazine 5 is slidably connected to the grip 1.

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Tokyo, Japan

Osamu Ebisawa