The invention relates to a stapler (10) for stapling sheet material by means of staples (12), each staple (12) having two staple legs (14) and a staple crown (16) interconnecting the staple legs (14) and extending transversely to them, with an anvil arm (26) having a support plate (38) for placing the sheet material thereon, the anvil arm (26) carrying a cutting pad (40) with two cutting edges (42) for cutting off excess end parts of the staple legs (14), with a stapling unit (30) that is pivotally mounted relative to the anvil arm (26), which stapling unit (30) comprises a staple magazine (32) receiving the staples (12) in a row with the staple crowns (16) mutually abutting and being aligned parallel to each other and a driver (36) for pushing individual staples (12) with the free ends of their staple legs (14) first through the sheet material, with a base part (18), on which the anvil arm (16) is mounted movably towards it against a restoring force, and with two two-armed bending levers (50) pivotably mounted on the anvil arm (26) about a respective pivot axis (52), each bending lever (50) having a first lever arm (54) with a bending surface (56) for bending the staple legs (14) and a second lever arm (58), wherein upon approach of the anvil arm (26) to the base part (18), the second lever arms (58) are pivoted by action of the base part (18) about the pivot axes (52) and the bending surfaces (56) bend the staple legs (14) towards each other and cut off any excess end portions by pressing against the cutting edges (42). According to the invention, it is provided that the pivot axes (52) extend substantially perpendicular to the staple crowns (16) of the staples (12) received in the staple magazine (32) and that the second lever arms (58) have end portions (66) beginning at their free ends (64) which are arranged offset to one another in the axial direction of the pivot axes (52) so that they move past one another as the anvil arm (26) approaches the base part (18).

A stapler for stapling sheet material with staples, each staple having two staple legs and a staple crown. The stapler having an anvil arm, with a stapling unit being pivotable relative to the anvil arm and including a staple magazine receiving the staples and a driver for pushing staples through the sheet material, with a base part, on which the anvil arm is mounted movably towards it, and with two two-armed bending levers pivotably mounted on the anvil arm about a respective pivot axis, each bending lever having a first and a second lever arm. Upon approach of the anvil arm to the base part, the second lever arms are pivoted and bend the staple legs. The pivot axes extend substantially perpendicular to the staple crowns and the second lever arms have end portions which are arranged offset to one another in the axial direction of the pivot axes.

A fastener driving tool includes a housing, a drive track within the housing, a magazine connected to the housing and configured to hold a supply of fasteners and to provide a leading fastener to the drive track, a driver configured to move downward in the drive track and drive the leading fastener into a workpiece during a drive stroke, a mount connected to the driver, and a clincher operatively connected to the housing and to the mount. The clincher is configured to engage the leading fastener during the drive stroke and move into a clinching position at the end of the drive stroke to clinch the fastener to the workpiece. A motor is configured to rotate a crank arm, and a connecting rod is pivotably connected to the mount at one end portion thereof and pivotably connected to the crank arm at an opposite end portion thereof.

To provide a stapler in which a staple leg of a nonmetal staple can be reliably bent with a small number of components and a simple configuration so as to reduce a cost. A stapler includes a penetration mechanism and a bending mechanism. Hole parts are provided in a pair of cutting blades of the penetration mechanism. The bending mechanism includes first and second bending members which protrude from the hole parts toward between the pair of cutting blades to bend a pair of staple legs, guide surfaces which guide the first and second bending members, and a slide member which drives the first and second bending members. The first and second bending members are provided between the guide surfaces and the slide member.

A method for replacing a clincher anvil of a clincher assembly of a fastener driving tool is provided. The method includes removing a first connector connecting the mount to a connecting rod operatively connected to a motor of the fastener driving tool through a first aperture in the housing, aligning second connector connecting the clincher anvil to a portion of the clinching assembly with a second aperture in the housing, removing the second connector through the second aperture, removing the clincher arm from the fastener driving tool, aligning a replacement clincher arm with the portion of the clinching assembly, inserting the second connector through the second aperture, securing the replacement clincher arm to the portion of the clinching assembly, inserting the first connector through the first aperture and into the mount, and connecting the mount to the connecting rod.

Tool-free adjustment members in a fastener driving tool. The fastener driving tool can be used to seal closed containers such as, for example, corrugated fiberboard cartons, by applying staples to the folded flaps or other closure parts to secure them in place. The tool-free adjustment members provide customizable drive settings for a variety of different sized staples and different workpiece conditions.

To provide a stapler in which a staple leg of a nonmetal staple can be reliably bent with a small number of components and a simple configuration so as to reduce a cost. A stapler includes a penetration mechanism and a bending mechanism. Hole parts are provided in a pair of cutting blades of the penetration mechanism. The bending mechanism includes first and second bending members which protrude from the hole parts toward between the pair of cutting blades to bend a pair of staple legs, guide surfaces which guide the first and second bending members, and a slide member which drives the first and second bending members. The first and second bending members are provided between the guide surfaces and the slide member.

A stapler includes a penetrating part including a pair of cutting blades to form holes in a workpiece and to cause leg portions of a staple to penetrate the workpiece, an operating member, and a bending part configured to bend the leg portions. The bending part includes a bending member configured to bend the leg portions of the staple, and a driving force transmitting section configured to transmit an operation of the operating member to the bending member.

A clenching adapter for use with automatic nailers tools is provided, which mounts to a nailer tool, and which extends behind a two-layer workpiece and curls the tip of a driven nail on the opposite side of the multiple-layer workpiece. The adapter includes a movable extension link that pivots on a proximal end, due to the action of an air cylinder actuator, and that pivoting motion causes an anvil mounted on its distal end to grasp the opposite (bottom) side of the workpiece, while also positioning the anvil to a location where it intercepts the nail that will be fired through the workpiece by the nailer tool. The anvil mechanism rotates from a relaxed position that fits within a gap in the boards of a workpiece, to an actuated ready position that receives and curls the nail, for clenching a multi-substrate workpiece. The actuations are automatically sequenced, in one embodiment.

A method for replacing a clincher anvil of a clincher assembly of a fastener driving tool is provided. The method includes removing a first connector connecting the mount to a connecting rod operatively connected to a motor of the fastener driving tool through a first aperture in the housing, aligning second connector connecting the clincher anvil to a portion of the clinching assembly with a second aperture in the housing, removing the second connector through the second aperture, removing the clincher arm from the fastener driving tool, aligning a replacement clincher arm with the portion of the clinching assembly, inserting the second connector through the second aperture, securing the replacement clincher arm to the portion of the clinching assembly, inserting the first connector through the first aperture and into the mount, and connecting the mount to the connecting rod.