Description
TASK AR Series is an industrial/occupational arm-support exoskeleton family developed by Daydo Co., Ltd. for work that requires sustained arm elevation, including construction, wiring, piping, painting, maintenance, manufacturing, agriculture, and other overhead or arm-raised tasks. Daydo’s development story identifies TASK AR as the company’s first TASK product line, with the “AR” standing for “Arm Rising”; TASK AR 3.0 was released in May 2021, followed by the simplified Type S model in 2022.
TASK AR TypeS is the lighter standard model, available as Type S2 without a shoulder harness and Type S3 with a shoulder belt for more stable fit. TASK AR X is the newer gas-spring platform, including the upper-arm-assist JRC/JRC-AU models co-developed with JR Tokai / Central Japan Railway and the higher-assist WJ/WJ-AU models that add forearm support for more demanding work
Variant breakdown
| Variant | Support area | Main difference | Device weight | Assist force/mechanism |
|---|---|---|---|---|
| TASK AR Type S2 | Upper arm/arm raising | No shoulder harness; lighter-contact fit | 1.6 kg (3.5 lb) | Shock cord; 14.7–29.4 N (1.5–3.0 kgf; 3.3–6.6 lbf), continuously adjustable |
| TASK AR Type S3 | Upper arm/arm raising | Shoulder belt for a more stable fit | 1.7 kg (3.7 lb) | Shock cord; 14.7–29.4 N (1.5–3.0 kgf; 3.3–6.6 lbf), continuously adjustable |
| TASK AR X JRC | Upper arm | Standard JRC model with waist belt | 2.1 kg (4.6 lb) | Gas spring; 39.2 N (4.0 kgf; 8.8 lbf) |
| TASK AR X JRC-AU | Upper arm | Assist-unit version without a waist belt; attaches to the user’s work belt | 1.9 kg (4.2 lb) | Gas spring; 39.2 N (4.0 kgf; 8.8 lbf) |
| TASK AR X WJ | Upper arm + forearm | Higher-assist model for high-load work; includes a waist belt | 2.7 kg (6.0 lb) | Gas spring; upper arm 68.6 N (7.0 kgf; 15.4 lbf), forearm 49.0 N (5.0 kgf; 11.0 lbf) |
| TASK AR X WJ-AU | Upper arm + forearm | Higher-assist assist-unit version without a waist belt | 2.5 kg (5.5 lb) | Gas spring; upper arm 68.6 N (7.0 kgf; 15.4 lbf), forearm 49.0 N (5.0 kgf; 11.0 lbf) |
Application(s): Industrial and occupational upper-limb support; overhead work; arm-raised work; construction, ceiling work, wiring, piping, painting, maintenance, manufacturing, agriculture, camera/video work, and electrical line work.
User Limits: Daydo’s TASK FAQ states the products are free size for adult men and women, but limited to users at least 1.50 m (4 ft 11 in) tall for safety. TypeS and TASK AR X waist-belt models list compatibility up to a 1.40 m (55.1 in) waist-belt length.
Daydo’s own development story says TASK AR began in 2017, the first productized TASK AR 1.0 was completed in 2019, and the product was based on/localized from EksoVest through the Ekso Bionics relationship.
Daydo has also announced a related special-application Composite Motion Assist Suit / 複合動作アシストスーツ for Japanese electrical distribution-line work. The device was developed with Kandenko and Nishiyama, with Daydo listed for development and manufacturing. Unlike the standard TASK AR arm-raising models, this passive, non-electric suit assists three motions used in overhead utility work: arm raising/lowering, external rotation or twisting, and elbow flexion/extension.
The suit is intended for complex distribution-line tasks such as hot-stick operation, cross-arm or support-arm attachment, and wire tensioning, where workers repeatedly raise, rotate, and pull with the upper limbs. Daydo lists the device weight as approximately 2.5 kg (5.5 lb) and describes a passive spring-based mechanism using shock cords, coil springs, and torsion springs, with assist forces of 14.7–29.4 N (1.5–3.0 kgf; 3.3–6.6 lbf) for arm raising/lowering, 24.5 N (2.5 kgf; 5.5 lbf) for external rotation, and 12.0 N (1.2 kgf; 2.7 lbf) for elbow flexion/extension. This appears best treated as a special-purpose TASK-family addendum rather than a separate catalog entry, since Daydo does not present it as a standard TASK AR commercial variant.
Daydo article: Composite Motion Assist Suit announcement
Daydo Co., Ltd., Company Profile
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