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2017年10月

2017年10月30日 (月)

Workshop (6)

次回この記事の日本語版を投稿します。

As mentioned in Workshop I have moved and I am in the long process of getting settled in.  In Workshop (1) I gave the workshop a heart by restoring on old bicycle shop clock.  In Workshop (2) I gave the workshop a torso by building a workbench.  In Workshop (3),  I gave the workshop extremities in the form of tools, and, in Workshop (4) and Workshop(5) I gave the workshop right and left hands by adding a Blacksmith vise and frame vise.  In this installment the workshop will receive the first leg.

Here is the leg, a simple but effective front wheel maintenance stand to raise the front wheel off the ground.  Excellent for working on and around the front wheel: adjusting rod brake stirrups, adjusting spoke tension, fixing flats, changing the tire, adjusting cone bearings, etc.  Let's take a closer look at this simple yet ingeniously designed front maintenance stand.
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Very simple materials, only uses 3 pieces of rod iron (neck, body and handle), a joiner piece connecting the neck to the body, and, two rubber tubes on the neck fork to protect the bicycle from getting scratched. No screws or nuts, just spot welded in four places.

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Here is the neck.
Again, note the rubber tubes on the neck fork to protect the bicycle from getting scratched.

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The neck fits in the joint formed between the underside of the down tube and rear of the head tube.
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The handle allows the stand to be fitted to the frame with one hand.Img_0031Img_0011_2Img_0025

The wide base provides stability.
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Using one hand the stand is inserted between the main frame and fork, with the neck portion fitted under the down tube and behind the head tube.

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The stand is pulled forward while simultaneously lifting upwards to raise the front wheel off the ground.
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The wide base of the stand, weight of the bicycle and weight distribution shifted to the rear stand all work together to provide a stable condition for working on and around the front wheel.
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Changing the angle of the stand raises or lowers the front wheel.
Steep angle raises the wheel well off the ground.
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Shallow angle lifts the wheel just off the ground.
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These old front wheel maintenance stands are very handy, made of simple materials and construction, easy to use, and, will last a lifetime.
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2017年10月15日 (日)

作業部屋(5)

I'll be back with another English post soon until then stay trued and happy wheels!

作業部屋の記事で述べたように、
転居後の片付けや整理をほぼ終えて、やっと作業部屋に手を付けられる状況になりました。
今まで作業部屋(1)では、
作業部屋の心臓になる、古い自転車屋さんの古時計を直し、
作業部屋(2)では、作業部屋の胴体となる作業台を作り、
作業部屋(3)で、使用時に一時的に体の一部となり、まるで「四肢」である、工具でした。
前回の作業部屋(4)では「右手」となる立万力を与え、今回は「左手」を。

右手と同様に左手は自転車修理用に設計された万力の一種で、
「フレーム万力またはパイプ万力」と言います。
見てみましょう。
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左側面に穴が二つ。
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上面も穴が2つ。
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右側面は穴が一つだけ。
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フレーム万力の前半分を取り外し断面的な構造が見えてきます。
各々の溝でフレームを縦、横、斜めに固定できます。
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畑屋工具カタログから抜粋した図ですが、よく似ています。
(畑屋について作業部屋(3) を参照)
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前半分の合わせ面(左側)と後半分の合わせ面(右側)
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横に固定
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縦に固定
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斜めに固定 
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斜めに固定(フレームが逆さま).
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作業台の左手と右手
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2017年10月 2日 (月)

Workshop (5)

次回この記事の日本語版を投稿します。

As mentioned in Workshop I have moved and I am in the long process of getting settled in.  In Workshop (1) I gave the workshop a heart by restoring on old bicycle shop clock.  In Workshop (2) I gave the workshop a torso by building a workbench.  In Workshop (3),  I gave the workshop extremities in the form of tools, and, in Workshop (4) I gave the workshop a right hand by adding a Blacksmith vise. In this installment the workshop will receive a left hand.

The left hand, like the right hand, is also a vise designed specifically for bicycle shops and is known in the bicycle industry as a frame or pipe vise.
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Left side has two holes.
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Top has two holes.
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Right side has a single hole.
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Here is the back half of the vise.  The grooves allow the frame to be held vertically, horizontally or diagonally.
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Below is a similar vise taken from a Hataya catalog.
(Refer to Workshop (3) for more on Hataya)
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Here we see the mating surface, the back half on the left and the front half on the right.
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Frame held horizontally.
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Frame held vertically.
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Frame held diagonally (right side up).
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Frame held diagonally (upside down).
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And there they are, the left and right hands on the workbench.
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