JP2008290238A - Right angle positioning device, locking pliers and F clamp - Google Patents

Abstract

The present invention provides a right-angle positioning device capable of positioning and clamping two independent workpieces only by adjusting a jig adjusting mechanism, and a locking pliers including the right-angle positioning device and an F clamp.
A work clamp is formed so that work planes are orthogonal to each other and symmetrically disposed, and a concave presser foot having two concave presser arm is formed, and work planes are formed so as to be orthogonal to each other. A right-angle positioning device including a convex presser foot 8 having two convex presser foot arms installed, wherein the work plane in the concave presser arm is parallel to the work plane in the convex presser arm during operation. To form a V-shaped jaw, and two independent workpieces can be positioned within the V-shaped jaw to be vertical.
[Selection] Figure 3

Description

  The present invention relates to a right angle positioning device, a locking pliers, and an F clamp, and more particularly to a right angle positioning device, a locking pliers, and an F clamp for two independent workpieces orthogonal to each other.

  Conventionally, as a manual jig, for example, a common workpiece or two independent workpieces are fixed in parallel, such as a locking pliers, a combination ply, a bench vice, a pipe wrench, a spanner, or the like. be able to. For example, a typical locking pliers includes a fixed handle, a fixed arm, a movable handle, a movable arm, a coupling mechanism, and an adjusting mechanism, and the working surfaces of the movable arm and the fixed arm are opposed to each other. By adjusting, the opening angle of the movable jaw and the fixed jaw can be adjusted, and when placing the workpiece, the opening angle is increased, and when tightening the workpiece, the opening angle is adjusted small.

  However, in the case of work such as soldering, processing, processing, etc., it is necessary to arrange two independent workpieces like “L” or “T”, and with a normal manual jig, work alone. It is difficult, and by using a plurality of positioning tools at the same time and working according to the jig, two independent workpieces must be tightened and fixed, which is troublesome.

  Various jaws can be accommodated in the adjustable jaws. For example, in the US patent of US Pat. No. 4,134,578, a V-shaped floating semicircular jaw is used for a clip applier to sandwich a planar, cylindrical and angular workpiece. In the US patent of US Pat. No. 4,305,575, an L-shaped jaw of a wooden frame ratchet is disclosed, and in the US patent of US Pat. No. 4,483,059, A V-shaped jaw for positioning a circular pipe with a jig or positioning tool is disclosed, and in US patent US Pat. No. 4,673,174, for holding a planar workpiece with jigs of different angles An angle adjustable V-shaped jaw is disclosed.

  However, each of these jaws is provided with a relatively small clip applier surface, and it is necessary to give a strong clamping force to the workpiece in order to tighten the workpiece firmly. If the clip applier surface is too small, the workpiece cannot be properly tightened even with a sufficiently strong screw tightening force. If the screw tightening force is too strong, a stronger clamping force will be applied to the workpiece surface at the same time. Risk of damage. On the other hand, in the conventional technique, since the jaw is small, the use of the jig is limited. Also, many of the jaws in the prior art cannot be adjusted at the tightening position, so the clip applier has an effective opening for adjusting the thickness or size of various workpieces (presser foot opening) Cannot be quickly and easily adjusted, and the use of the jig for a wide range is limited.

Patent US 4,134,578 Patent US 4,305,575 Patent US 4,483,059 Patent US 4,673,174

  When the present invention is used in combination with various jigs, for example, one jig, the jig can be positioned and clamped to two independent workpieces by simply adjusting the adjustment mechanism of the jig. It is an object to provide a right-angle positioning device, a locking plier having the same, and an F clamp.

  In order to achieve the above object, the present invention provides a concave presser having two concave presser arms that are formed so as to be orthogonal to each other and are symmetrically installed, and a work plane that is orthogonal to each other. A convex presser having two convex presser arms that are formed and symmetrically installed, and at the time of work, by making the work plane in the concave presser arm parallel to the work plane in the convex presser arm A right-angle positioning device characterized in that a V-shaped jaw is formed and two independent workpieces can be positioned in the V-shaped jaw so as to be vertical.

  The concave presser of the right-angle positioning device has two concave presser arms, the convex presser has two convex presser arms, and a work plane is formed on the concave presser arm and the convex presser arm. A large clamping surface can be provided. This is applied to jigs that give strong clamping force, such as locking pliers, F clamps, etc., and the work plane of the concave presser is opposed to the work plane of the convex presser during work, so that the workpiece is clamped. A V-shaped jaw is formed. When used in accordance with jigs such as locking pliers, F clamps, etc., an independent workpiece can be obtained simply by adjusting the adjustment mechanism of the jig and adjusting the opening angle or clamping force of the V-shaped jaw. The positioning and clamping can be completed.

  The present invention further provides a locking plier including a movable arm, a fixed arm, a fixed handle, a movable handle, the movable arm, and an adjustment mechanism for adjusting an opening / closing angle or a clamping force of the fixed arm. A concave presser having two concave presser arms that are formed so that the work planes are orthogonal to each other and installed symmetrically, and are formed symmetrically so that the work planes are orthogonal to each other. Including a right angle positioning device including a convex presser having two convex presser arms, one of the movable arm and the fixed arm being connected to the concave presser and the other being connected to the convex presser, By making the work plane in the concave presser arm parallel to the work plane in the convex presser arm, a V-shaped jaw is formed. The workpiece, so as to perpendicular to each other, a locking pliers which is characterized in that it can be positioned within the V-shaped jaws. Since the locking pliers are used as the carrier of the right angle positioning device, the clamping becomes simple and contributes to the work at a high place.

  In the right angle positioning device for the locking pliers, the concave presser has two concave presser arms, the convex presser has two convex presser arms, and a work plane is formed on the concave presser arm and the convex presser arm. As a result, the right angle positioning device can be provided with a larger clamping surface. When working with the locking pliers, the work plane of the concave presser is opposed to the work plane of the convex presser to form a V-shaped jaw for sandwiching the work piece. When sandwiching two workpieces orthogonal to each other, the opening angle or clamping force of the V-shaped jaw may be adjusted only by the adjusting mechanism of the locking pliers.

  Further, the present invention is an F clamp including a plastic path rod and a moving arm, and further includes a concave presser foot having two concave presser arm arms which are formed so that their work planes are orthogonal to each other and are symmetrically installed. And a right-angled positioning device including two convex presser arms that are formed symmetrically with the work planes being orthogonal to each other, and the concave presser is connected to the plastic path rod. The convex presser foot is connected to the moving arm, and the V-shaped jaw is formed by making the work plane of the concave presser arm parallel to the work plane of the convex presser arm during the work. An F-clamp characterized in that workpieces can be positioned in the V-shaped jaws perpendicular to each other.

  In the F-clamp right angle positioning device, the concave presser has two concave presser arms, the convex presser has two convex presser arms, and a work plane is formed on the concave presser arm and the convex presser arm. As a result, the right angle positioning device can be provided with a larger clamping surface. When working with the F clamp, the work surface of the concave presser is opposed to the work surface of the convex presser, thereby forming a V-shaped jaw for clamping the workpiece. When two workpieces orthogonal to each other are clamped, the opening angle or clamping force of the V-shaped jaw may be adjusted only by the moving arm of the F clamp.

  Hereinafter, the above-described objects, technical means, and effects of the present invention will be described in detail with reference to the drawings and specific embodiments.

  At the same time, reference is made to FIG. 3, FIG. 4, FIG. 5 and FIG. The locking pliers 1 of the present invention include a fixed arm 3, a fixed handle 2, a movable arm 6, and a movable handle 5, and further includes an adjustment screw 4 and a crank handle 16. A through-hole for inserting the crank handle 16 is provided at the free end of the adjustment screw 4. The crank handle 16 mainly holds the clamping force generated by the movable arm 6 and the fixed arm 3 when the adjustment screw 4 is rotated. Leverage to make adjustments easier. By rotating the crank handle 16, the adjustment screw 4 is advanced and retracted with respect to the fixed crank handle 2, and the opening angle of the movable arm 6 and the fixed arm 3 is adjusted, thereby contributing to the clamping to the workpiece. As described above, the locking pliers 1 are provided with the crank handle 16 at the free end of the adjusting screw 4 compared with the locking pliers having only the adjusting screw, so that the clamping force due to the opening to the workpiece is quick and convenient. It is possible to provide a means for adjusting to the above. When the clamping to the workpiece is finished and the handle 7 is released, the locking pliers 1 are returned to the initial normally open state by the return force of the spring 60.

  When the right angle positioning device of the present invention is not disposed in the locking pliers 1, the locking pliers 1 function as a general locking pliers such as sandwiching one or two parallel workpieces by the movable arm 6 and the fixed arm 3. When the right-angle positioning device of the present invention is disposed, two workpieces having independent right angles can be sandwiched.

  Hereinafter, the right angle positioning device of the present invention will be described in detail.

  As shown in FIG. 6, the right angle positioning device includes a convex presser foot 8 and a concave presser foot 11. An example is to hold two independent workpieces 91 and 92. The workpiece 91 and the workpiece 92 may be arranged in an “L” shape as shown in FIG. 6A or 6B, and as shown in FIG. It may be arranged in a T ”shape. For convenience of explanation, in the following description, the side closer to the workpiece of the convex presser foot 8 is “outside”, the side away from the workpiece is “inner side”, and the side of the concave presser foot 11 closer to the workpiece is “inner side”. “, The side away from the workpiece is defined as“ outside ”.

  As shown in FIG. 1, the convex presser foot 8 of the right-angle positioning device includes two concave presser arm 80 and 81 which are symmetrically installed. There is a work plane 82 outside the concave presser arm 80, and a work plane 83 outside the concave presser arm 81. The work plane 82 and the work plane 83 are orthogonal to each other. Are connected by an arcuate curved surface 84. As shown in FIG. 2, a mounting portion 81 in which a pin shaft hole 90 is formed is installed inside the convex presser foot 8. As shown in FIGS. 10 and 11, the pin shaft 93 is inserted into the pin shaft hole 90, and the axis of the pin shaft 93 or the pin shaft hole 90 is 45 degrees with respect to the work plane 82 or the work plane 83. preferable. In FIG. 10, the 1st connection structure by the convex-surface presser foot 8 and a clamping device is shown. In FIG. 11, the 2nd connection structure by the convex-surface presser foot 8 and a clamping device is shown. There are various types of clamping devices connected to the convex presser foot 8, and the locking pliers and the F clamps will be described later.

  As shown in FIG. 10, the pin shaft 93 is also inserted into the end portion of the bolt 41, and is engaged with the bolt 41 while having play. Therefore, the convex presser foot 8 in FIG. 10 can float with respect to the bolt 41 with the pin shaft 93 as a pivot. As will be described later, the convex presser foot is connected to the clamping device by a bolt 41 and a nut 45.

  As shown in FIG. 11, the universal joint 43 installed on the pin shaft 93 includes an inner ball, and the convex presser 8 in FIG. 11 is the pan bolt for the inner ball to engage with the pan portion of the pan bolt 42. 42, and the convex presser foot 8 is rotated around the bolt 42 around the pan portion of the pan bolt 42. As will be described later, the convex presser foot 8 is connected to the clamping device by a bolt 42 and a nut 45.

  As shown in FIG. 3, the bolt 41 in FIG. 10 can be replaced with the straight handle 9 and the nut 45 with the leverage link mechanism 13.

  As shown in FIG. 3, the concave presser foot 11 of the right-angle positioning device includes two concave presser arm 110 and 111 which are symmetrically installed. There is a work plane 112 inside the concave presser arm 110, a work plane 113 inside the concave presser arm 111, the work plane 112 and the work plane 113 are orthogonal to each other, and the concave presser arm 110 and the concave presser arm. 111 are connected via a U-shaped connecting portion 114. As shown in FIG. 4, when positioning two independent workpieces 21 and 22, the work planes 113 and 112 of the concave presser arm 111 and 110 are connected to the work planes 82 and 83 of the convex presser arm 80 and 81, respectively. By making them parallel, a V-shaped jaw is formed, and the two independent workpieces 21 and 22 are arranged between the work plane 113 of the concave presser arm and the work plane 82 of the convex presser arm which are parallel to each other. The concave presser arm arm working plane 112 and the convex presser arm arm working plane 83 are positioned in parallel.

  3, 4, and 5 show a configuration in which the right-angle positioning device is disposed on the locking pliers 1. Connection of the convex presser foot 8 to the fixed arm 3 of the locking pliers 1 is very easy. 10 and 11, it is only necessary to provide a through hole in the fixed arm 3, but when the bolt 41 in FIG. 10 is replaced with the straight handle 9, a square through hole is provided in the fixed arm 3. One leverage link mechanism 13 may be connected to the fixed arm 3. That is, it is not necessary to substantially change the configuration of the fixed arm 3 regardless of the connection configuration of the convex presser foot 8 and the convex presser foot 8. The connection between the concave presser foot 11 and the movable arm 6 will also be described later in that it is not necessary to substantially change the configuration of the movable arm 3. That is, when the right-angle positioning device is removed from the locking pliers 1, the conventional function of holding a parallel workpiece or one workpiece can be achieved. The locking pliers are connected to the convex presser in the configuration shown in FIGS. 10 and 11 because the convex presser and the concave presser are widely used by floating the convex presser with respect to the concave presser. In addition, the connecting structure of the convex jaw gimbals shown in FIG. 11 and the floating structure around the axis shown in FIG. 10 are large clamps when workpieces of different thicknesses are clamped. It can be applied to the surface, improving the stability, and can also be applied to the case where the force by the presser foot is not located on the same straight line. Such floating allows the clamping force in the V-shaped jaws to be positioned on the same straight line.

  When the locking pliers 1 are operating, the work plane 82 and the work plane 83 of the convex presser 8 are parallel to the work plane 113 and the work plane 112 of the concave presser 11, respectively. As shown in FIG. 4, two independent workpieces 22 and 21 are arranged between the work plane 82 and the work plane 113 which are parallel to each other, and between the work plane 83 and the work plane 112 which are parallel to each other. The workpiece 22 and the workpiece 21 are positioned in an “L” shape. When a force is applied to the movable handle 5 to the fixed handle 2, the workpiece 22 and the workpiece 21 in which the convex presser 8 and the concave presser 11 are arranged in an “L” shape are firmly held. . As shown in FIG. 5, the independent workpiece 32 and workpiece 31 are arranged between a work plane 82 and a work plane 113 which are parallel to each other, and between a work plane 83 and a work plane 112 which are parallel to each other. The workpiece 32 and the workpiece 31 are arranged in a “T” shape. From FIG. 5, when positioning two independent workpieces arranged in a “T” shape by the concave presser 11 and the convex presser 8, positional accuracy is required for the workpiece 31. In actual use, since the worker moves the work piece 31 to correspond to the concave presser foot 11, it is very inconvenient for an operator at a high place.

  FIG. 7 shows another configuration of the concave presser 40 which is the concave presser of the right angle positioning device of the present invention. As shown in FIG. 7 (a), the concave presser foot 40 includes a concave presser arm 41 having a work plane 43 and a concave presser arm 42 having a work plane 44. It is orthogonal. The concave presser arm 41 intersects the concave presser arm 42. The concave presser foot 40 has an arc-shaped opening 45 that penetrates the work plane 44. In order to avoid that the throat thickness between the concave presser foot and the convex presser foot affects or limits the size of the work piece, the positioning grooves for fixing the concave presser foot 40 to the locking pliers have different angles or directions. As shown in FIG. 7B, the concave presser foot 40 has a mounting hole 400 and positioning grooves 401, 402, 403, and the positioning grooves 401, 402, 403 are concave pressers. The gold arm 41 is provided on the side opposite to the working plane, extends in the radial direction of the mounting hole 400, and positioning grooves 401, 402, 403 with the mounting hole 400 connect the concave presser foot 40 to the jig. Used for. As shown in FIG. 8, the concave presser foot 40 is connected to the movable arm 6 of the locking pliers 1 by the mounting hole and the positioning groove that is alternatively selected. By connecting the convex jaws with the gimbals so as to be well engaged with the multidirectional positioning grooves, the moving direction of the workpiece sandwiched between the convex jaws and the concave jaws is not limited to one direction. . Here, it can be seen that the design of the mounting hole and positioning groove of the concave presser 40 shown in FIG. 7B may be applied to the outside of the concave presser 11 in FIGS.

  8 and 9 show that the concave presser foot 40 in FIG. 7 is applied to the locking pliers 1. Since the concave presser foot 40 has the arc-shaped opening 45, the workpiece 61 can be arranged so as to be parallel to the work plane 44 and orthogonal to the work plane 43. The arc-shaped opening 45 in the concave presser foot 40 allows the workpiece 6 to pass through the V-shaped jaw while the two workpieces 61 and 62 are kept in contact with each other. In the case of such a positioning device of the above technique, it is general to adjust the workpiece to the positioning device by moving and holding the clamped workpiece on the stage surface or the working surface, that is, the workpiece to the positioning device. 8 and 9, in the embodiment of FIGS. 8 and 9, the locking pliers are clamped especially when soldering at a high place by moving the pliers body and the right-angle positioning device so as to match the workpiece. It is widely used in areas such as positioning. Further, the arc-shaped opening 45 allows the rocking pliers to hold the air tool in carpentry work and is suitable for drilling and nailing, and also provides a larger working space for soldering.

  FIG. 14 shows a presser foot case 86 for the convex presser foot. Referring to FIG. 1 or FIG. 2 at the same time, the presser foot case 86 can cover the presser foot arm 80 or the presser foot arm 81 of the convex presser foot, and functions as a pad when sandwiching a thin workpiece.

  FIG. 13 shows a configuration in which the right-angle positioning device is arranged in an F clamp. As shown in FIG. 13, the F clamp according to the present invention includes a plastic path rod 131 and a moving arm 132, and further includes a right angle positioning device 130. The right-angle positioning device 130 includes a concave presser 134 similar to the configuration of the concave presser 40 in FIG. 8 and a convex presser similar to the convex presser 8 in FIG. It is composed of gold 133. In other words, the concave presser bar 134 includes two concave presser arm arms 1340 and 1341 that are installed symmetrically, and work planes 1342 and 1343 are formed on the concave presser arm 1340 and the concave presser arm 1341, respectively. The convex presser foot 133 includes two convex presser foot arms 1330 and 1331 that are arranged symmetrically, and work planes 1332 and 1333 are formed on the convex presser foot arms 1330 and 1331, respectively. Are orthogonal to each other. Since the screw hole is formed in the plastic path rod 131, the concave presser bar 134 is connected to the plastic path rod 131 with the screw 135. Since the screw hole is formed in the moving arm 132, the convex presser foot 133 is connected to the moving arm 132 by tightening the screw 136. When working, the work planes 1342 and 1343 are made parallel to the work planes 1332 and 1333 to form a V-shaped jaw, and two independent workpieces (not shown) are parallel to each other. The work plane 1342 and the work plane 1332 are positioned and sandwiched between the work plane 1343 and the work plane 1333. The pin shaft 138 is installed in the mounting portion 1335 of the convex presser foot 133 on the side opposite to the work planes 1332 and 1333 of the convex presser arm, the axis is at 45 degrees with the work planes 1332 and 1333, and penetrates the screw 136. In addition, by engaging with the screw 136 while having play, the convex presser 133 can float with the pin shaft 138 as the central axis, but of course the convex presser 133 floats. It can also be connected to the screw in a gimbal manner. When a crank handle 137 for rotating the screw 136 by a leverage effect is provided at the free end of the screw 136, the clamping force can be easily adjusted.

  As described above, preferred embodiments of the present invention have been disclosed. However, the present invention is not limited, and various modifications can be made by those skilled in the art without departing from the spirit and scope of the present invention. Equivalent changes, replacements or applications can be made. For example, in FIGS. 3, 4, 5, 8 and 12, the positions of the convex presser and the concave presser may be replaced according to the use preference of the operator, that is, of the fixed arm and the movable arm. Since one side may be connected to the convex presser foot and the other may be connected to the concave presser foot, the protection scope of the present invention is interpreted by the claims.

FIG. 1 is a perspective view in one direction of the convex presser foot of the right angle positioning device in one embodiment of the present invention, and mainly shows the configuration of the outer side of the convex presser foot. FIG. 2 is a perspective view of the convex presser foot in FIG. 1 in the other direction, mainly showing the inner structure of the convex presser foot. FIG. 3 is a perspective view of a locking plier according to an embodiment of the present invention. FIG. 4 is a perspective view showing the case where the locking pliers in FIG. 3 clamp a workpiece having an “L” -shaped arrangement. FIG. 5 is a perspective view illustrating a case where the locking pliers in FIG. 3 sandwich two workpieces arranged in a “T” shape. FIG. 6 shows the positions of the workpiece, the convex presser foot, and the concave presser foot during the operation of the right angle positioning device in one embodiment of the present invention, where FIG. 6 (a) shows the first position, FIG. 6B shows the second position, and FIG. 6C shows the third position. FIG. 7 shows the configuration of the concave presser foot of the right angle positioning device in one embodiment of the present invention, where FIG. 7 (a) is a perspective view in one direction, mainly the inner configuration of the concave presser foot. FIG. 7B is a perspective view in another direction, mainly showing the configuration of the outer side of the concave presser foot. FIG. 8 is a perspective view showing a locking pliers including the concave presser foot in FIG. FIG. 9 is a perspective view showing the locking pliers during operation in FIG. FIG. 10 shows a first connection configuration of the convex presser foot and the fixed arm in the present invention. FIG. 11 shows a second connection configuration of the convex presser foot and the fixed arm in the present invention. FIG. 12 is a front view of a locking pliers according to an embodiment of the present invention. FIG. 13 is a perspective view of the F clamp in one embodiment of the present invention. FIG. 14 shows a convex presser case according to the present invention, which covers the convex presser arm of the convex presser in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Locking pliers 2 Fixed handle 3 Fixed arm 6 Movable arm 8, 133 Convex presser 11, 40 Concave presser 42, 80, 81, 41, 110, 111, 1340, 1341 Concave presser arm 43, 44, 82, 83 , 43, 112, 113, 1332, 1333, 1342, 1343 Work plane 45 Arc-shaped openings 80, 81, 1330, 1331 Convex presser arm 130 Right angle positioning device 131 Plastic path rod 132 Moving arm 135 Screw 138 Pin shaft 400 Mounting hole 401, 402, 403 Positioning groove 1335 Mounting part

Claims (22)

In a right angle positioning device for positioning two independent workpieces,
A concave presser foot having two concave presser arm arms formed so that the work planes are orthogonal to each other and installed symmetrically;
A convex presser having two convex presser arms that are formed so that their work planes are orthogonal to each other and are symmetrically installed;
During operation, a V-shaped jaw is formed by making the work plane in the concave presser arm parallel to the work plane in the convex presser arm, so that the two independent workpieces are perpendicular to each other. A right angle positioning device characterized in that it can be positioned in a letter-shaped jaw.   The concave presser arm has an arc-shaped opening penetrating the work plane, and one of two independent workpieces can pass through the arc-shaped opening during work. The right angle positioning device according to 1.   The concave presser foot includes a mounting hole and a positioning groove provided on a side opposite to the work plane of any of the concave presser foot arms and extending in a radial direction of the mounting hole, and cures the concave presser foot. The right angle positioning device according to claim 1, wherein the right angle positioning device is connected to a tool.   4. The right angle positioning device according to claim 3, wherein an axis of the mounting hole is 45 degrees with respect to a working plane of any concave presser arm.   4. The right angle positioning device according to claim 3, wherein the concave presser foot has a plurality of the positioning grooves, and is connected to the jig by the mounting holes and the positioning grooves selected alternatively. .   The convex presser foot is provided with a pin shaft whose axis is 45 degrees with the work plane of any convex presser arm, and includes a mounting portion installed on the side opposite to the work plane of any convex presser arm. The right-angle positioning device according to claim 1. In a locking pliers including a movable arm, a fixed arm, a fixed handle, a movable handle, and an adjustment mechanism for adjusting an opening / closing angle or clamping force of the movable arm and the fixed arm,
A concave presser foot having two concave presser arm arms formed so that the work planes are orthogonal to each other and installed symmetrically;
A right angle positioning device including a convex presser foot having two convex presser arm arms formed so that their work planes are orthogonal to each other and installed symmetrically;
One of the movable arm and the fixed arm is connected to the concave presser foot, and the other is connected to the convex presser foot,
During operation, a V-shaped jaw is formed by making the work plane in the concave presser arm parallel to the work plane in the convex presser arm, so that the two independent workpieces are perpendicular to each other. Locking pliers characterized in that they can be positioned in a letter-shaped jaw.   The concave presser arm has an arc-shaped opening penetrating the work plane, and one of two independent workpieces can pass through the arc-shaped opening during work. 7. The locking pliers according to 7.   The concave presser foot has a mounting hole and a positioning groove that is provided on the side opposite to the working plane of any of the concave presser foot arms and extends in the radial direction of the mounting hole. The locking pliers according to claim 7, wherein the locking presser and the concave presser foot and the movable arm or the fixed arm are fixed via the mounting hole and the bolt.   10. The locking pliers according to claim 9, wherein the axis of the mounting hole is 45 degrees with respect to the working plane of any concave presser arm.   The concave presser foot has a plurality of the positioning grooves, and is connected to the movable arm or the fixed arm by the attachment holes and the positioning grooves selected alternatively. Locking pliers.   The convex presser foot is connected to a fixed arm or a movable arm via one lifter, and has a mounting portion installed on the side opposite to the work plane in any convex presser arm, and the lifter is attached to the convex presser foot. The locking pliers according to claim 7, wherein the portion and the fixed arm or the movable arm are connected.   The lifter is inserted into a mounting hole installed in the fixed arm or the movable arm so that the position of the convex presser with respect to the concave presser can be adjusted, and is moved or fixed to the mounting hole by a position adjusting device. The locking pliers according to claim 12, wherein:   The locking pliers according to claim 13, wherein the attachment portion and the lifter are rotatably connected so that the convex presser can float.   The locking pliers according to any one of claims 12 to 14, wherein a pair of universal joints are provided on the mounting portion and the lifter so that the convex presser foot is connected to the lifter with a gimbal structure. .   The locking pliers according to claim 13, wherein the main body of the lifter is a screw, and the position adjusting device is a nut.   14. The locking pliers according to claim 13, wherein a saw tooth is formed on a main body of the lifter, and the position adjusting device is a wedge and a leverage link mechanism.   The adjustment mechanism has an adjustment screw installed on the fixed handle, and a crank handle for rotating the adjustment screw by a leverage effect is provided at the end of the adjustment screw, so that the opening and closing angles and clamping force of the movable arm and the fixed arm are provided. The rocking pliers according to claim 7, wherein the pliers are adjusted.   8. The locking pliers according to claim 7, wherein the convex presser arm of the convex presser is covered with a presser case. In an F clamp including a platy pass rod and a moving arm,
A concave presser foot having two concave presser arm arms formed so that the work planes are orthogonal to each other and installed symmetrically;
A right angle positioning device including a convex presser foot having two convex presser arm arms formed so that their work planes are orthogonal to each other and installed symmetrically;
The concave presser foot is connected to the plastic path rod, the convex presser foot is connected to the moving arm, and the V-shaped by making the work plane in the concave presser arm parallel to the work plane in the convex presser arm during work. An F-clamp characterized in that a jaw is formed and two independent workpieces can be positioned vertically in the V-shaped jaw.   A screw hole is formed in each of the platy path rod and the moving arm, the platy path rod is connected to the concave presser foot by the screw hole on the platy pass rod, and the convex arm is connected to the concave presser foot by the screw hole and screw on the platy pass rod. The screw is penetrated through the screw hole of the moving arm, and is rotatably connected to the mounting portion of the convex presser foot on the side opposite to the working plane of the convex presser arm so that the convex presser can float. The F clamp according to claim 20, wherein   The concave presser arm has an arc-shaped opening that penetrates the work plane, and one of two independent workpieces can pass through the arc-shaped opening during work. F clamp as described.

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