Holding frame and holder

A holding frame comprising:

• a frame forming portion including four frame sides defining an inner area which extends in a direction in which a workpiece is stretched taut, each of the four frame sides including:
• a first holding surface;
• a second holding surface;
• a first connecting portion connecting the first holding surface and the second holding surface;
• and
• a portion including a magnetic material;
• and
• a holder including:
• a first holding portion;
• and
• a second holding portion,
• wherein the first holding surface and the second holding surface extend in two different directions crossing the direction in which the workpiece is stretched taut,
• wherein the first holding surface is a plane perpendicular to the direction in which the workpiece is stretched taut and located outside the second holding surface in an outward direction away from the inner area of the frame forming portion,
• wherein the first holding surface includes a first portion connected to the first connecting portion, and a first end located opposite from the first portion, the second holding surface includes a second portion connected to the first connecting portion, and a second end located opposite from the second portion, and a distance between the first end and the second end is greater than a distance between the first portion and the second portion,
• wherein, in a state where the holder is attached to a corresponding one of the frame sides, the first holding surface of the corresponding frame side faces an inner surface of the first holding portion, and the second holding surface of the corresponding frame side faces an inner surface of the second holding portion, and
• wherein the first holding portion includes, on the inner surface thereof, a first permanent magnet, and the second holding portion includes, on the inner surface thereof, a second permanent magnet.

A holding frame comprising:

• a frame forming portion defining an inner area which extends in a direction in which a workpiece is stretched taut, the frame forming portion including:
• a first holding surface defined by a first portion of the frame forming portion;
• and
• a second holding surface defined by a second portion of the frame forming portion;
• and
• a holder configured to be magnetically attached to the frame forming portion, the holder including:
• a first holding portion;
• a second holding portion;
• and
• a second connecting portion connecting the first holding portion and the second holding portion,
• wherein, in a state where the holder is attached to the frame forming portion, the first holding portion and the second holding portion extend in two different directions crossing the direction in which the workpiece is stretched taut,
• wherein the first holding portion includes a third portion connected to the second connecting portion, and a third end located opposite from the third portion, the second holding portion includes a fourth portion connected to the second connecting portion, and a fourth end located opposite from the fourth portion, and a distance between an inner surface at the third end of the first holding portion and an inner surface at the fourth end of the second holding portion is greater than a distance between the inner surface at the third portion of the first holding portion and the inner surface at the fourth portion of the second holding portion,
• wherein, in the state where the holder is attached to the frame forming portion, the first holding surface faces the inner surface of the first holding portion, and the second holding surface faces the inner surface of the second holding portion,
• wherein one of the first holding portion and the first holding surface includes a magnet and the other includes a magnetic material, and
• wherein one of the second holding portion and the second holding surface includes a magnet and the other includes a magnetic material.

A holding frame comprising:

• a frame forming portion defining an inner area which extends in a direction in which a workpiece is stretched taut, the frame forming portion including:
• a first holding surface defined by a first portion of the frame forming portion;
• and
• a second holding surface defined by a second portion of the frame forming portion;
• and
• a holder configured to be magnetically attached to the frame forming portion, the holder including:
• a first holding portion;
• a second holding portion;
• and
• a second connecting portion connecting the first holding portion and the second holding portion,
• wherein, in a state where the holder is attached to the frame forming portion, the first holding portion extends in a direction parallel to an area surface of the inner area, and the second holding portion extends in a direction crossing the direction in which the workpiece is stretched taut,
• wherein the first holding portion includes a third portion connected to the second connecting portion, and a third end located opposite from the third portion, the second holding portion includes a fourth portion connected to the second connecting portion, and a fourth end located opposite from the fourth portion, and a distance between an inner surface at the third end of the first holding portion and an inner surface at the fourth end of the second holding portion is greater than a distance between the inner surface at the third portion of the first holding portion and the inner surface at the fourth portion of the second holding portion,
• wherein, in the state where the holder is attached to the frame forming portion, the third end is configured such that the holder is movable in the direction parallel to the direction in which the workpiece is stretched taut,
• wherein, in the state where the holder is attached to the frame forming portion, the first holding surface faces the inner surface of the first holding portion, and the second holding surface faces the inner surface of the second holding portion,
• wherein one of the first holding portion and the first holding surface includes a magnet and the other includes a magnetic material, and
• wherein one of the second holding portion and the second holding surface includes a magnet and the other includes a magnetic material.

A holder configured to be magnetically attached to a holding frame which includes a frame forming portion defining an inner area extending in a direction in which a workpiece is stretched taut, the holder comprising:

• a first holding portion;
• a second holding portion, and
• a second connecting portion connecting the first holding portion and the second holding portion,
• wherein, in a state where a holder is attached to the frame forming portion, the first holding portion and the second holding portion extend in two different directions crossing the direction in which the workpiece is stretched taut,
• wherein the first holding portion includes a third portion connected to the second connecting portion, and a third end located opposite from the third portion, the second holding portion includes a fourth portion connected to the second connecting portion, and a fourth end located opposite from the fourth portion, and a distance between an inner surface at the third end of the first holding portion and an inner surface at the fourth end of the second holding portion is greater than a distance between the inner surface at the third portion of the first holding portion and the inner surface at the fourth portion of the second holding portion, and
• wherein at least two of the first holding portion, the second holding portion, and the second connecting portion include a magnet.