A rivet feeding system having a hopper, an inclined rail, and a fastening assembly is disclosed. The hopper accommodates a plurality of rivets, each having a head and a tail, in a barrel rotatably mounted to a stationary back. The hopper permits a single rivet to exit the hopper at a time and the exiting rivets are received by the inclined rail. The inclined rail has a channel defined by two sidewalls and the channel is sized to accommodate the rivet tail and the two sidewalls are positioned to support the rivet head. The inclined rail is positioned to receive rivets in a first orientation and to deliver rivets to the fastening assembly in a second orientation that is distinct from the first orientation. The fastening assembly includes a stationary anvil positioned below a moveable punch and a pair of pivotable jaws positioned between the anvil and the moveable punch.

A collet to feed and fasten cylindrical rivets includes an inlet unit that accepts and supports the rivet, a first feeding unit connected from the inlet unit and configured to feed the rivet, a second feeding unit connected to the first feeding unit opposite to the inlet unit and configured to feed the rivet, and an outlet unit that is connected to the second feeding unit opposite to the first feeding unit and supports the rivet that is fed to it. The inlet unit and the first feeding unit have at least two first slots at opposite angles, the second feeding unit and the outlet unit have more of second slots than the first slots, and when the rivet enters the first feeding unit, the second slots are closed by the opening of the first slots.

A collet to feed and fasten cylindrical rivets includes an inlet unit that accepts and supports the rivet, a first feeding unit connected from the inlet unit and configured to feed the rivet, a second feeding unit connected to the first feeding unit opposite to the inlet unit and configured to feed the rivet, and an outlet unit that is connected to the second feeding unit opposite to the first feeding unit and supports the rivet that is fed to it. The inlet unit and the first feeding unit have at least two first slots at opposite angles, the second feeding unit and the outlet unit have more of second slots than the first slots, and when the rivet enters the first feeding unit, the second slots are closed by the opening of the first slots.

A spring arm sleeve, with which a joining element of a joining device is positionable and which comprises the following features: a tubular section which is formed by a circumferential or all-round wall, the circumferential wall comprises in the circumferential direction a plurality of U-shaped apertures regularly spaced apart from one another, which form a plurality of one-sidedly fastened spring arms which are inclined radially inwards into the tubular section and extend from a fixed end in a first longitudinal direction.

A spring arm sleeve, with which a joining element of a joining device is positionable and which comprises the following features: a tubular section which is formed by a circumferential or all-round wall, the circumferential wall comprises in the circumferential direction a plurality of U-shaped apertures regularly spaced apart from one another, which form a plurality of one-sidedly fastened spring arms which are inclined radially inwards into the tubular section and extend from a fixed end in a first longitudinal direction.

Rivet dispenser systems and methods of use thereof are provided. In a non-limiting embodiment, the rivet dispenser system comprises a rivet receiving member defining a channel therein, and a seat member. The channel includes a curved region. The rivet receiving member comprises a first port and a second port. The first port communicates with the channel and is configured to receive rivets. The second port communicates with the channel and is configured to dispense rivets. The channel extends between the first port and the second port and is configured to transport rivets from the first port to the second port in a series arrangement and in a preselected orientation. The seat member communicates with the second port and is configured to selectively engage with a rivet holder of a resistance spot rivet welding apparatus and introduce a single rivet to the rivet holder at one time.

A fastening tool includes a motor, a fastening mechanism, a tool body and a main handle. The motor includes a motor body and a motor shaft. The fastening mechanism is configured to fasten workpieces via a fastener by pulling a pin of the fastener rearward relative to a tubular part of the fastener along a driving axis defining a front-rear direction of the fastening tool. The tool body houses the motor and the fastening mechanism. The main handle extends in a direction crossing the driving axis and connected to the tool body such that the main handle and the tool body together form an annular part. A rotational axis of the motor shaft extends parallel to the driving axis. A portion of the main handle is located in a rear space extending behind the motor body.

A fastening tool includes a motor, a fastening mechanism, a tool body and a main handle. The motor includes a motor body and a motor shaft. The fastening mechanism is configured to fasten workpieces via a fastener by pulling a pin of the fastener rearward relative to a tubular part of the fastener along a driving axis defining a front-rear direction of the fastening tool. The tool body houses the motor and the fastening mechanism. The main handle extends in a direction crossing the driving axis and connected to the tool body such that the main handle and the tool body together form an annular part. A rotational axis of the motor shaft extends parallel to the driving axis. A portion of the main handle is located in a rear space extending behind the motor body.

An attachment for an end effector. The attachment may include a clamp and a foot adhesively bonded to an edge of the clamp and having a set of interlocking features that form a mechanical interlock with the clamp.

An attachment for an end effector. The attachment may include a clamp and a foot adhesively bonded to an edge of the clamp and having a set of interlocking features that form a mechanical interlock with the clamp.