US-20260124689-A1 - Workpiece stop arrangement for a circular saw

US20260124689A1US 20260124689 A1US20260124689 A1US 20260124689A1US-20260124689-A1

Abstract

The invention relates to a workpiece stop arrangement for a miter saw or sliding compound miter saw having two stops ( 20 ) disposed spaced apart from each other, wherein a spacer area ( 80 ) for the passage of a saw blade ( 76 ) is formed between the two stops ( 20 ). To improve the usability of a circular saw, provision is made for at least one of the stops ( 20 ) to have a stop piece ( 30 ) having a mount ( 33 ), to or in which an exchangeable stop piece ( 40 ) is exchangeably attached, wherein the exchangeable stop piece ( 40 ) projects at least sectionally beyond the stop piece ( 30 ) into the spacer area ( 80 ).

Inventors

Wolfgang Spengler

Assignees

FESTOOL GMBH

Dates

Publication Date: 20260507
Application Date: 20231002
Priority Date: 20221007

Claims (20)

1 - 15 . (canceled)
16 . A workpiece stop arrangement for a miter saw, comprising: first and second stops spaced apart from each other to form a spacer area for the passage of a saw blade between the first and second stops; wherein the first stop includes a first stop piece including a first mount and a first exchangeable stop piece exchangeably attached to the first mount, the first exchangeable stop piece projecting at least partially beyond the first stop piece into the spacer area.
17 . The workpiece stop arrangement of claim 16 , wherein: the second stop includes a second stop piece including a second mount and a second exchangeable stop piece exchangeably attached to the second mount; wherein both the first and second exchangeable stop pieces project into the spacer area facing each other and a sawing gap for the passage of the saw blade is formed between longitudinal ends of the exchangeable stop pieces.
18 . The workpiece stop arrangement of claim 16 , wherein: the second stop includes a second stop piece including a second mount; wherein the first exchangeable stop piece bridges the spacer area and is exchangeably connected to both the first and second stop pieces.
19 . The workpiece stop arrangement of claim 16 , wherein: the first stop piece has a front-end workpiece contact surface and the first exchangeable stop piece has a front-end contact surface aligned with the front-end workpiece contact surface.
20 . The workpiece stop arrangement of claim 16 , wherein: the first stop piece is connected to the first exchangeable stop piece by a centering connection including a centering lug on one of the first stop piece or the first exchangeable stop piece and a centering mount on the other of the first stop piece or the first exchangeable stop piece.
21 . The workpiece stop arrangement of claim 20 , wherein: the first stop piece is connected to the first exchangeable stop piece by two centering connections spaced apart from each other.
22 . The workpiece stop arrangement of claim 16 , wherein: the first exchangeable stop piece includes at least one fastening mount; and the first stop piece includes a fastening lug inserted into the fastening mount.
23 . The workpiece stop arrangement of claim 16 , wherein: the first stop piece includes a support surface; and the first exchangeable stop piece includes a support section seated on the support surface.
24 . An exchangeable stop piece for a workpiece stop arrangement for a miter saw, comprising: a base body including a front contact surface configured to contact a workpiece to be machined, the base body including a holding section including one or more fastening mounts and a seating surface offset with respect to the contact surface.
25 . The exchangeable stop piece of claim 24 , wherein: the one or more fastening mounts comprises two spaced-apart fastening mounts formed as cut-outs or recesses in the holding section.
26 . The exchangeable stop piece of claim 24 , wherein: the holding section is configured as a fastening arm cantilevered from the base body.
27 . The exchangeable stop piece of claim 24 , wherein: the base body includes two spaced-apart centering lugs disposed spaced apart from the one or more fastening mounts.
28 . The exchangeable stop piece of claim 24 , wherein: the base body includes a transition section adjoining the front contact surface, wherein the seating surface is disposed offset in a direction towards a rear of the exchangeable stop piece relative to the front contact surface.
29 . The exchangeable stop piece of claim 28 , wherein: the seating surface is parallel to the front contact surface.
30 . The exchangeable stop piece of claim 24 , further comprising: a support section projecting rearward from the base body, the support section including a mating support surface.
31 . The exchangeable stop piece of claim 24 , wherein: the base body includes an end section projecting oppositely from the holding section, the end section including a body edge forming a longitudinal end of the exchangeable stop piece to form a boundary of a spacer area for the passage of a saw blade of the miter saw.
32 . The exchangeable stop piece of claim 24 , wherein: the base body includes a second holding section projecting oppositely from the first mentioned holding section, the second holding section including a further one or more fastening mounts.
33 . A miter saw, comprising: a base part including a support and a rotary unit, the rotary unit forming a workpiece support surface and having an axis of rotation oriented perpendicular to the workpiece support surface; a swivel arm swivel connected to the support such that the swivel arm can be swiveled about a swivel axis oriented perpendicular to the axis of rotation; a saw head carried by the swivel arm and configured to receive a saw blade on a saw blade holder defining a saw blade plane, the saw head being coupled to the swivel arm about a miter axis of a miter bearing such that the saw head can swivel about the miter axis; wherein a saw slot is formed in the workpiece support surface of the rotary unit along the saw blade plane to receive the saw blade at least partially during a separating cut; and a workpiece stop arrangement including an exchangeable stop piece, the exchangeable stop piece including a base body including a front contact surface configured to contact a workpiece to be cut by the saw blade, the base body including a holding section including one or more fastening mounts and a seating surface offset with respect to the front contact surface.
34 . The miter saw of claim 33 , wherein: the workpiece stop arrangement includes first and second stops spaced apart from each other to form a spacer area for the passage of the saw blade between the first and second stops; the first stop includes a first stop piece including a first mount and the exchangeable stop piece is exchangeably attached to the first mount, the exchangeable stop piece projecting at least partially beyond the first stop piece into the spacer area; the first stop piece includes a linear guide having one or more guide elements configured to allow movement of the stop piece in a width direction of the spacer area; and sliding motion of the first stop piece into the spacer area is limited by engagement of a limit stop such that the exchangeable stop piece does not extend into the saw blade plane when the limit stop is engaged.

Description

The invention relates to a workpiece stop arrangement for a miter saw, in particular a miter saw or sliding compound miter saw, having two stops disposed spaced apart from each other, wherein a spacer area for the passage of a saw blade is formed between the two stops. U.S. Pat. No. 5,819,619 describes a miter saw having a base part that can be placed on a flat work surface. The base part forms a workpiece support surface. Furthermore, the base part has a swivel arm on its rear section, which can be swiveled about a horizontal swivel axis extending in the direction of the saw blade plane for angled cuts. A saw head is attached to the swivel arm, which saw head can be swiveled about a cutting axis relative to the swivel arm. A workpiece stop arrangement is installed on the workpiece support surface. The workpiece stop arrangement has two stops disposed spaced apart from each other, between which a spacer area is formed, through which the saw blade can pass when the saw head is swiveled about the cutting axis. The stops each have a support that is installed on the workpiece support surface. Each of the supports bears a stop piece that projects beyond the workpiece support surface to establish a contact surface for a workpiece to be machined. The stop pieces can be moved relative to the supports to change the width of the space between the two stop pieces. This is necessary, for instance, when the circular saw is used to make a bevel cut. The two stop pieces must then be spaced further apart to prevent the saw blade from cutting into one of the stop pieces. The greater distance between the stop pieces reduces the effective support surface for the workpiece, which results in poorer positioning, in particular of small workpieces. Furthermore, although the problem is well known, it sometimes happens that a stop piece is inadvertently sawn into. The stop piece must then be replaced, which incurs corresponding costs. The invention addresses the problem of providing a workpiece stop arrangement of the type mentioned at the beginning, which offers improved usability. This problem is solved in that at least one of the stops has a stop piece having a mount, to or in which an exchangeable stop piece is exchangeably attached, preferably to form a kinematic unit with the stop piece, which in particular can be uniformly moved, wherein the exchangeable stop piece projects at least sectionally beyond the stop piece into the spacer area. This new design has several advantages. If the saw blade accidentally cuts into the exchangeable stop piece, for instance during an angled cut or, depending on the design of the miter saw, during a rip cut, the stop piece itself will not be damaged. The exchangeable stop piece can then simply be replaced with a new, undamaged exchangeable stop piece at no great expense. Furthermore, applications are also conceivable, in which the miter saw or sliding compound miter saw is equipped with an emergency braking system that detects capacitive changes via the saw blade. In such a case, it is advantageous if the exchangeable stop piece is made of a non-conducting material such that the emergency braking system is not triggered when the saw blade cuts into the exchangeable stop piece. Furthermore, applications are also conceivable, in which a good support of the workpiece in the correct position is desired, particularly in the spacer area between the two stop pieces. It is then advantageous if the exchangeable stop piece(s) protrude(s) as far as possible into the spacer area. The ideal position for the workpiece would be if the entire spacer area is covered by the exchangeable stop piece(s). For the best possible support of the workpiece, the exchangeable stop piece or exchangeable stop pieces can be deliberately moved far into the spacer area. The miter saw is set to the desired cutting position and then a setting cut into the exchangeable stop piece is performed. As a result, the workpiece is supported on the exchangeable stop piece or exchangeable stop pieces immediately behind the sawing gap during a subsequent workpiece cut. Such a procedure is particularly advantageous when a large number of consistent workpieces have to be cut at a specific cutting setting. If a different cutting setting is then set, the cut exchangeable stop piece(s) can simply be replaced. Preferably, at least the area of the exchangeable stop piece that projects into the spacer area is made of a material that is easy to saw, such as a plastic material. Preferably, the entire exchangeable stop piece is designed as a plastic part, in particular as an injection-molded plastic part. The integral design of the exchangeable stop piece not only reduces the cost of this component, but also achieves the high dimensional accuracy required for a precise workpiece system. Preferably, the exchangeable stop piece is made of a non-conducting material, for instance a plastic material, i.e., it is designed as a plastic part, in particular as