Background and overview
Japanese National Railways developed 113-700 series suburban DC electric multiple unit (EMU) trains featuring the protection against snow and coldness for the start of newly constructed Kosei line linking Yamashina and Omi-Shiotsu in July 1974. 14 four-car sets consisting of 2 powered vehicles and 2 trailer vehicles were delivered and allocated to Takatsuki depot.
Car body
They have 2900mm wide body. Their body design incorporates lightweight
shaped steel and pressed forming beam to realize a light weight body. Their
skin and roof panel feature cold-rolled steel. The floor features lightweight
painted vehicle floorboards for fireproof. Their cab end is gangwayed,
having a gangway door and curved surface windscreens on the front. A destination
roll sign is fitted above the gangway door. Two headlights employing the
sealed beam light bulb are fitted each side of the gangway and two taillights
are fitted below the headlights. The pneumatic horns located beside headlights
are equipped with the shutter for the protection against snow. They are
equipped with three 1300mm wide double-leaf automatic sliding doors. 1075mm
wide double-hung unit assembled side windows, both the upper and lower
sashes of which move up, and door case windows are fitted between the doors,
and 515mm and 1075mm wide double-hung unit assembled windows and a smaller
door case window are fitted at the end of the body. Door operating equipments,
TK8, allowing hand operation to prevent the passenger's room from being
cold in winter are fitted on the door header of the sliding doors. A destination
rollsign is fitted on each side of the body. Class moha112-700 vehicles
are equipped with 5 forced draught ventilators on their roof and the others
6. They are also equipped with an air conditioner, AU75B, rated at 42000kcal/h
on the centre of the roof. Their livery is green with orange wide band
around side windows.
Bogies
Motored bogies are DT21B, and trailer bogies are TR62, employing swing hanger construction, coil springs as bolster spring, and pedestal type journal supporting system. The bogie located at the front of the end vehicle is equipped with a small wedge plough. The parallel cardan drive with hollow shaft is applied for the power transmission device. The gear ratio is 4.82. Motored bogies employ the double tread brake rigging and trailer bogies employ the disk brake rigging.
Traction unit and ancillary equipments
Eight series-wound brushed DC traction motors, MT54D, featuring international
standard are controlled by the armature-resistance traction control system,
CS12G, fitted to powered intermediate vehicles, class moha113-700. Class
moha112-700 vehicles are equipped with a motor generator, MH135-DM92, with
a power output of 160kVA. Class moha112-700 vehicles are also equipped
with a current pickup, PS16, on their roof. Powered intermediate vehicles,
class moha112-700, and trailer end vehicles, class kuha111-750, are equipped
with a motor driven air compressor, MH80A-C1000, under their floor. They
adopt electromagnetic straight air brake with the rheostatic brake.
Accommodation
They have mixture of longitudinal bench seating and transverse seating bays with 1420mm seating pitch. Longitudinal bench seating is located at beside doors. The cab section of the driver's seat is extended compared to 113-0 series. Class kuha111-700/-750 vehicles are equipped with a Japanese style toilet floored with s stainless steel for anti-corrosion and having a chemical holding tank, located at the rear of the body.
Additional delivery
Vehicles built from 1975 have a minor improvement that the ventilator located next to the back of the air conditioner is moved further away from the air conditioner to improve the ventilation.
Modification
JR West
Refurbishment programme N
In addition to special maintenance work focused on retaining the function the vehicles, refurbishment programme N to improve outdated accommodation was applied for 82 113-700 series vehicles over the period from September 1987 until May of the following year. Some accommodation improvements were included for these works. The fabric of seating was changed into red. Some parts of the luggage rack were replaced with those made by stainless steel, and the others were plated in silver coloured. The decorative end panels were replaced with brown coloured, and the decorative wainscot panels were replaced with peptone brown-coloured plates. Additional fluorescent lights were fitted to improve the illuminance in the passenger room.
Work for speed improvement
-5700 subseries
JR West modified 113-700 series used on JR Kobe, JR Kyoto, Biwako and Hanwa line rapid services with some improvements from 1992, including load-responding brake, improved brake lining and shoe, improved primary spring for the hunting prevention, and changing brake lever ratio in order to introduce 110km/h operation, and classified them into -5700 subseries. Furthermore, 4-car sets used on Sagano line were additionally equipped with the buttons beside the door to open or close the door manually by pushing them and were also equipped with the automatic jumper coupler to ease rush-up operations over the period from November 1999 until November 2002.
-5750 subseries
JR modified 6-car sets of 113-700 series allocated at Miyahara depot, consisting of 4 powered vehicles and 2 trailer vehicles, with some improvements over the period from August 1992 until September, including load-responding brake, improved brake shoe and lining, improved primary spring for the hunting prevention, and brake lever ratio changed from 2.56 to 4.19 of powered vehicles in order to introduce 110km/h operation, and classified them into -5750 subseries. Furthermore, 4-car sets used on Sagano line were additionally equipped with the buttons beside the door to open or close the door manually by pushing them and were also equipped with the automatic jumper coupler to ease rush-up operations over the period from November 1999 until November 2002.
Refurbishment programme N40
JR West commenced refurbishment programme on a pair of moha113/112-5720 in 1998 and a pair of moha113-112-5719 in 2001 to bring the accommodation and ancillary equipments at the similar level to the contemporary rolling stocks.
Car body
Corroded body skin was refurbished, and the rain gutter was integrated with the body skin. Ventilators on the roof were removed. Door operating equipments were changed into the direct driven type and the buttons beside the door were additionally fitted to open or close the door manually by pushing them. For draft prevention, side windows located between sliding doors were changed into the aluminum made double sash unit assembled window, the upper sash of which moves down and lower fixed, and windows located at the end of the body were changed into the fixed window. The method to equip door case windows and the windscreen with the windowpane was changed into gluing.
Accommodation
Prefabricated panels were employed for the ceiling construction to flat the ceiling and the fluorescent lights fitted on the ceiling were covered. Straps were fitted throughout their body. Seating accommodation was changed into 2+2 abreast switchable transverse seating with 910mm seating pitch excepting the end of the end vehicles. The overhead luggage racks were changed into constructed with pipes having the decorative cover at the edge. The covers fitted on the floor for the inspection of the traction motor were filled with the plates. Doors located at both end of the vehicle were changed into self-closing.
Operations
113-700 series entered revenue service linking Kyoto and Nagahara at the opening of the Kosei line in 1974. 8 train sets were increased to 6 vehicles with the addition of a pair of powered intermediate vehicles built additionally in 1975. They entered the Kusatsu line local services at the start of electrified Kusatsu line in 1978. After splitting JNR into new privatized JR companies in 1987, they also began to be used on the JR Kobe and JR Kyoto lines rapid services. However, they were displaced with 221 series and 223 series and surplus displaced 113-700 series replaced superannuated 113-0 series used on Sagano line local services. Furthermore, 113-700 series used on Sagano line ordinary services were displaced with 221 series and some surplus displaced 113-700 series were transferred to Hiroshima and Okayama depots and the others were scrapped. 113-700 series used on local services in Hiroshima were displaced with 227-0 series and scrapped.
On the other hand, 113-700 series used on Kosei and Kusatsu line local
services were displaced with 223-2000 series and 223-2500 series and they
were scrapped in 2023. |
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