Ordinance on Industrial Safety and Health
Ministry of Labour Ordinance No. 32 of September 30, 1972
Latest Amendments:
Ministry of Health, Labour and Welfare Ordinance No. 47 of March 30, 2007
In Japanese
掲載日：2008.03.28
Part II Safety Standards
Chapter II Construction Machine, etc
Section 2 Pile Driver, a Pile Drawer and a Boring Machine
Article 172 (Strength, etc.)
- (1) The employer shall, as regards a pile driver and a pile drawer driven by power (excluding those capable of self-propelling to unspecified places) and a boring machine, not use bodies, accessory devices and fittings unless otherwise falling under the following requirements:
- (i) To have necessary strength corresponding to the purpose of use.
- (ii) To be free from extreme damage, wear, deformation or corrosion.
Article 173 (Prevention of Collapse)
- (1) The employer shall, as regards a pile driver driven by power (hereinafter referred to as “pile driver”) or a pile drawer driven by power (hereinafter referred to as “pile drawer”) and a boring machine, take the following measures for preventing collapse:
- (i) When installing the said machine on soft ground, to use boards, blocks, etc., for preventing settling of legs or a mounting.
- (ii) When installing the said machine on facilities or a temporary stand, to confirm the durability, and when the durability is insufficient, to reinforce.
- (iii) When legs or a mounting is liable to slide, to secure by using piles, wedges, etc.
- (iv) For a pile driver, a pile drawer or a boring machine designed to be moved on rollers or on rail tracks, to secure them with rail clamps, a stopper, etc., in order to prevent unexpected move.
- (v) In the case that the top portion is to be stabilized with stays (including staying wires, hereinafter the same shall apply in this Section) only, to use three or more stays and each end of the stays is secured to a sound tie bar, iron frame, etc.
- (vi) In the case that the top portion is to be stabilized with staying wires only, to stabilize the top portion in all directions by methods such as to arranging staying wires at an equal interval and increasing the number of staying wires.(vii) In the case that stabilizing the said machine by using balance weights, to fix them securely on a mounting in order to prevent the said balance weights from shifting.
Article 174 (Prohibition of the Use of an Inadequate Wire Rope)
- (1) The employer shall, as regards a hoisting wire rope for a pile driver, a pile drawer or a boring machine, not use the ropes falling under any of the following each item:
- (i) Those with joints.
- (ii) Those with 10% or more of the element wires (excluding filler wires) of which are cut in one strand.
- (iii) Those with the reduction ratio of a diameter exceeding 7% of the nominal diameter.
- (iv) Those with kink.
- (v) Those with marked deformation or corrosion.
Article 175 (Safety Coefficient of Hoisting Wire Ropes)
- (1) The employer shall, as regards hoisting wire ropes for a pile driver or a pill drawer, set the safety coefficient at six or more.
- (2) The safety coefficient set forth in the preceding paragraph shall be the value obtained by dividing the breaking load of the wire rope with the maximum value of the load applied on to the said wire rope.
Article 176 (Hoisting Wire Rope)
- (1) The employer shall, as regards hoisting wire ropes to be used on a pile driver, a pile drawer or a boring machine, take the following measures:
- (i) Hoisting wire ropes have a length sufficient to leave at least two windings on their drum at the time when the dropping weight or hammer is placed at the lowest position, at the position for starting the drawing of a sheet pile or the suspension tool, including the rod, is at its lowest position.
- (ii) Hoisting wire ropes be fixed securely to the drum of the hoisting device with clamps, clips, etc.
- (iii) A dropping weight or a hammer be connected to the hoisting wire rope of the pile driver and the hoisting wire rope of the boring machine shall be connected to a pulley device or a hoisting swivel, etc., securely with clamps, clips, etc.
Article 177 (Connection with Sheet Piles, Rods, etc.)
- (1) The employer shall, as regards hoisting wire ropes, pulley blocks, etc., of a pile driver or a boring machine connect with poles, sheet piles, rods, etc., by using such tools as shackles, checking fixtures, hoisting swivels, etc., having sufficient strength.
Article 178 (Providing a Brake, etc.)
- (1) The employer shall, as regards the winch of a pile driver, a pile drawer or a boring machine, provide the machine with a ratchet or a brake equipped with a clamp. However, this shall not apply to the winch used for a boring machine with a braking device of band brake, etc.
Article 179 (Installation of a Winch)
- (1) The employer shall, as regards a winch of a pile driver, a pile drawer or a boring machine, install it in a manner that floating, shifting, sway, etc., may be prevented.
Article 180 (Position of Sheaves)
- (1) The employer shall, as regards the distance between the shaft of a drum barrel of a pile driver, pile drawer or boring machine and the shaft of the first sheave from the hoisting device, set such distance to a value equivalent to 15 times or more of the width of the drum of the hoisting device.
- (2) The sheave set forth in the preceding paragraph shall be located on the plane passing through the center line of the drum of the hoisting device and being perpendicular to the shaft.
- (3) The provisions of the preceding two paragraphs shall not apply to the case falling under the following each item:
- (i) When it is unlikely to entanglement of the hoisting wire rope because of the structure of the pile driver, a pile drawer or a boring machine.
- (ii) When carrying out the work using a boring machine in a conspicuously confined space such as a tunnel and workers are prohibited from entering the area whereit is liable to cause dangers due to cutting of the hoisting wire rope.
Article 181 (Fitting of Sheaves, etc.)
- (1) The employer shall, as regards sheaves or pulley blocks of a pile driver, a pile drawer or a boring machine, fasten the said devices securely using fittings, shackles, wire ropes, etc., which are unlikely to be destroyed by the load applied to the fixed part.
Article 182
- (1) The employer shall, as regards sheaves of a pile driver, a pile drawer or a boring machine in which a winch is not built in with the tower or the twin pillar, etc., arrange them in a manner that the horizontal component of force acting on the hoisting wire rope does not affect the tower or the twin-pole. However, in the case that such measures as providing a prop to the leg of the towered the twin pillar and supporting the leg by wire ropes, sheaves may be fixed on the said leg part.
Article 183 (Steam Hose, etc.)
- (1) The employer shall, when using a pile driver or a pile drawer driven with steam or compressed air, take the following measures:
- (i) To connect a steam hose or an air hose with a hammer at a place other than the joint parts of the hose and the hammer for preventing the breakage or disconnection of these joints parts due to the motion of the hammer.
- (ii) To install a device for cutting steam or air at the place where a hammer operator can handle easily.
Article 184 (Measures to Be Taken at the Time of Irregular Winding)
- (1)The employer shall, when a wire rope is wound irregularly on the drum of a pile driver, a pile drawer or a boring machine, not apply a load on the hoisting wire rope.
Article 185 (Measures to Be Taken When Stopping the Hoisting Device)
- (1) The employer shall, when leaving a hoisting device of a pile driver, a pile drawer or a boring machine stopped while applying the load, securely stop it by applying latchets, brake with holdfast.
Article 186 (Prohibition of Leaving the Operating Station)
- (1) The employer shall not allow the operator of a pile driver, a pile drawer or a boring machine to leave the operating station of the machine while applying the loads.
- (2) The operator set forth in the preceding paragraph shall not leave the operating station of a pile driver or a pile drawer while applying the loads.
Article 187 (Prohibition of Entry)
- (1) The employer shall not allow a worker to enter the inside of the bent part of a hoisting wire rope of a pile driver, a pile drawer or a boring machine during operation in order to prevent dangers of the spring motion of the wire rope or flying sheaves, pulley blocks, etc., due to the breakage of sheaves, pulley blocks or their fixing parts of the said machines.
Article 188 (Measures to Be Taken When Hoisting Sheet Piles and Rods, etc.)
- (1) The employer shall, when hoisting piles, sheet piles and rods, etc., with a pile driver or a boring machine, have the operator of the said machine hoist piles in such a manner that the hook part be located right under the sheave or the pulley block of the machine. The same shall apply to the case of hoisting a pile or sheet pile by providing a pile driver with such a hoisting device as a gin pole.
Article 189 (Signals)
- (1) The employer shall set fixed signals for an operation of a pile driver, a pile drawer or a boring machine, designate a person who gives the signals and have the said person give the signals when operating.
- (2) An operator of a pile driver, a pile drawer or a boring machine shall follow the signals set forth in the preceding paragraph.
Article 190 (Direction of the Work)
- (1) The employer shall, when carry out the work of erection, disassembling, altering or transfer of a pile driver, a pile drawer or a boring machine, determine a method, a procedure, etc., of work, and make them known to a worker, designate a person who direct the operation, and have the workers carry out the work under the direct supervision of the said person.
(Transfer of a Pile Driver etc.)
Article 191. When transferring the leg part of a pile driver or a pile drawer supported with stayed wires, etc., standing twin poles, supporting poles, etc., by power driven winch or other machines, the employer shall perform the operation while braking the movement of the machine securely with a winch, tension blocks, etc., from the opposite side in order to prevent collapse due to excessive drag applied to the leg part.
(Inspection)
Article 192. When a pile driver, pile drawer or boring machine has been erected, the employer shall inspect the machine on the following items and shall not permit use of the machine before confirming the absence of any abnormality:
- Existence of damage and slackness of joint parts of the machine.
- Fixed condition of hoisting wire ropes, sheaves, and pulley blocks.
- Functions of the brake and blocking devices of a hoisting device.
- Installation condition of winches.
- Fixing method and firmness of the stays where the top section of a pile driver or a pile drawer is secured with stays.
Article 191 (Transfer of a Pile Driver etc.)
(1) The employer shall, when transferring the leg part of a pile driver or a pile drawer supported with stayed wires, etc., with standing posture of twin pillar, mast, etc., by power-driven winch or other machines, carry out the operation while braking the movement of the machine securely with a winch, tension blocks, etc., from the opposite side in order to prevent collapse due to excessive drag applied to the leg part.
Article 192 (Checkup)
(1) The employer shall, when having erected a pile driver, pile drawer or boring machine, check the following matters, and not allow the use of the said machines unless having confirmed that there is no abnormality:
(i) Damage and slackness of joint parts of the machine.
(ii) Fixed condition of a hoisting wire rope, a sheave, and a pulley block.
(iii) Functions of the brake and latchetsof a hoisting device.
(iv) Installation condition of a winch.
(v) For a pile driver or a pile drawer of which the top is secured with stays: Fixing method and firmness of the stays.
Article 193 (Measures to Be Taken in the Case of Slackening the Staying Wires)
- (1) The employer shall, when slackening the staying wires (including temporary staying wires, hereinafter the same shall apply in this Article) of a pile driver or a pile drawer, take appropriate measures such as using tension blocks or winches in order to prevent letting the load exceed the amount the workers engaged in the slackening operation are able to easily support.
Article 194 (Prevention of Collapse of Gas Conduits)
- (1) The employer shall, in the case where work using a pile driver or boring machine is carried out, and when it is liable to cause dangers to workers due to damage of gas conduits, underground raceways and other underground structure (hereinafter referred to as “gas conduits, etc.” in this Article) , in advance, make investigation for work place by enquiring the existing of the gas conduits, etc., and confirming their conditions to the person administrating the said gas conduits, etc., and take measures in conformity with what are known by the investigation.
Article 194-2 (Measures to Be Taken when Attaching Rods, etc.)
- (1) The employer shall, when attaching or removing a rod or a bit, etc., of a boring machine, obstruct power driving the rod, etc., securely by fixing the clutch lever with a stopper.
- (2) The employer shall, when removing a rod or attaching or removing a bit, etc., from a boring machine, store the rod securely in a rod holder, etc.
Article 194-3 (Fixing, etc. of a Hose for a Water Swivel)
- (1) The employer shall, as regards a hose connected to the water swivel of a boring machine, take measures such as fixing said hose with a tower in order to prevent workers from danger due to the said hose being trapped into the rotating parts of the rod, etc.
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