JP2000354973A - Plastic-made rotational operating tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plastic made rotational operating tool capable of favourably and easily rotationally operating a plastic made screw member such as a nut, etc. SOLUTION: A rotational operating tool 1 is a plastic made integral mold constituted of a tool main body 6 and an operating lever 7 connected to its base end part. A fulcrum part 9 to be irregularly engaged with a recessed part 5 formed on an outer peripheral surface 4 of a rotationally operated part 3 of a plastic made screw member 2 is formed on a head end part of the tool main body 6. A working point part 8a to be frictionally engaged with the outer peripheral surface 4 of the rotationally operated part 3 in a state where the fulcrum part 9 is irregularly engaged with the recessed part 5 is formed on a base end part of the tool main body 6. It is possible to rotate the plastic made screw member 2 in the specified direction R by revolutionally operating the operating lever 7 in a direction Ra to pressurize the working point part 8a on the outer peripheral surface 4 of the rotationally operated part 3 around an engaged part of the fulcrum point 9 of the tool main body 6 and the recessed part 5 of the rotationally operated part 3 as its center.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic screw member (such as a pipe connecting nut of a plastic pipe joint or the like) having a circular or polygonal section to be rotated having a concave or convex portion formed on the outer peripheral surface. The present invention relates to a plastic rotary operation tool used for manually rotating a joint body or the like).

[0002]

2. Description of the Related Art As a rotary operation tool of this type, a metal (cast) wrench, spanner, or the like is generally known. Such a metal tool needs to avoid metal contamination. It cannot be used in semiconductor manufacturing factories and the like.

[0003] That is, in a semiconductor manufacturing plant or the like where it is necessary to avoid metal contamination, the entire piping including the pipe joints and the like is made of plastic. However, screw members used for such plastic piping are used. (For example, the rotation operation (tightening operation, etc.) of a pipe connection nut (union nut) which is a female screw member constituting a pipe joint or a joint body which is a male screw member) is performed by using a metal rotation operation tool as described above. If used, there is a possibility that metal powder is generated from the tool and metal contamination occurs.

Therefore, in a semiconductor manufacturing plant or the like, as shown in FIG. 10A, a rotary operating tool for rotating the above-mentioned plastic screw member is formed on the screw member 102 in the same manner as a metal spanner. A plastic spanner 101 having a pair of claw portions 101a, 101a that sandwiches the rotated operation portion 103 having a polygonal cross section (for example, hexagonal shape) is used.

[0005]

By the way, as shown in FIG. 10A, such a plastic wrench 101 has two opposing surfaces 103a, 103a of a rotating operation part 103.
Since the torque is applied to the screw member 102 by the frictional engagement force between the 3a and the opposing surfaces of the claw portions 101a, 101a sandwiching the 3a, it is necessary to secure a sufficient frictional engagement force to rotate the screw member 102. is there.

However, in the case of the plastic spanner 101, the strength (rigidity) of the claw portions 101a, 101a is inferior to that of the metal, so that when a torque is applied to the screw member 102, as shown in FIG. As shown in FIG.
a, the area where the frictional engagement force acts is shifted from the two surfaces 103a, 103a to the ends (corners) 103b, 103b on the rotation direction side,
A sufficient frictional engagement force for rotating the screw member 102 cannot be secured, and the screw member 102 cannot be rotated. On the other hand, the strength of the claw portions 101a, 101a can be improved by enlarging their shapes. However, in this case, the spanner 101 becomes unnecessarily large, and the area around the screw member 102 or the rotatable operation portion 103 is increased. Therefore, a large space is required for the claw portions 103a, 103a to move (rotate), and it is difficult to smoothly rotate the screw member 102 which is often arranged in a narrow place.

An object of the present invention is to provide a novel plastic rotary operation tool which can easily rotate a plastic screw member without causing such a problem.

[0008]

According to the present invention, there is provided a plastic rotary operating tool for rotating a plastic screw member having a circular or polygonal rotary operated portion having a concave or convex portion formed on an outer peripheral surface. It is for operation and, in order to achieve the above object, is particularly configured as follows.

That is, the rotary operating tool according to the present invention is an integrated plastic product comprising a tool main body and an operating lever connected to a base end thereof. While forming a fulcrum part which engages unevenly with the convex part, and at the base end part of the tool body, the fulcrum part is engaged with the concave part or convex part of the rotated operation part on the outer peripheral surface of the rotated operation part. An operation point portion for frictional engagement is formed, and the operation lever is moved around the engagement portion between the fulcrum portion of the tool body and the concave or convex portion of the rotated operation portion. The screw member can be rotated by rotating the screw member in a direction in which the screw member is pressed against the surface.

[0010]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to FIG.

FIGS. 1 to 5 show a plastic pipe for rotating a pipe connecting nut (union nut) 2 of a pipe joint in a plastic pipe installed in a semiconductor manufacturing factory in a tightening direction R or a direction opposite thereto. Of the rotary operation tool 1 is shown. The nut 2 which is a female screw member is shown in FIGS.
As shown in FIG. 5, a plastic (for example, P
FA made), and a knurled concavo-convex portion is formed on the outer peripheral surface 4 of the rotated operation portion 3. That is,
On the outer peripheral surface 4 of the rotated member 3, a plurality of concave grooves 5 extending linearly in the axial direction are formed at regular intervals in the circumferential direction.

As shown in FIGS. 1 to 5, the rotary operation tool 1 is an integrated plastic product comprising a curved tool main body 6 and a linear operation lever 7 connected to the base end thereof. The integrally molded article 1 is formed of a band-shaped frame portion 1a having a constant width W constituting an outer peripheral surface thereof, a flat plate-shaped core portion 1b located at the center in the width direction of the frame portion 1a, A plurality of rectangular plate-like ribs 1c connecting the opposing surfaces of the portion 1a are formed by injection molding with an appropriate plastic material (in this example, PP).
The ribs 1c are provided to reduce the weight of the tool 1 as much as possible while maintaining the strength of the tool 1. In particular, the parts constituting the tool body 6 and the operation lever 7
1 and 2, the ribs 1c have a truss structure so as to prevent deformation of the portion when the operating lever 7 is operated as much as possible. . The thickness W of the tool 1 and the height H of the operation lever 7 are, for example, W × H = 6 mm × 13 mm, 7.5 mm
× 13mm, 8mm × 15mm, 9.5mm × 15m
m, 13 mm × 20 mm, 16 mm × 20 mm, etc., can be appropriately set according to the size, shape, and the like of the rotated operation section 3 or the tool 1. In this example, W × H
= 16 mm x 20 mm.

The tool body 6 is, as shown in FIGS.
It has a curved shape having an arc-shaped inner peripheral surface 8, and has an appropriate number of concave and convex engagements at its distal end with concave grooves 5, which are concave portions formed on the outer peripheral surface 4 of the rotated member 3. In this example, 3
) Are formed. As shown in FIGS. 2 and 4, each of the fulcrum portions 9 protrudes from a distal end portion of the inner peripheral surface 8 of the tool body 6 so as to form a ridge extending in the width direction. The mutual intervals (intervals in the longitudinal direction of the inner peripheral surface 8) and the shapes of these fulcrum portions 9 are as shown in FIGS.
When the tool main body 6 is fitted to the outer peripheral surface 4 of the rotated operation portion 3, the three fulcrum portions 9 are set so as to engage with the three concave grooves 5 adjacent to each other.

As shown in FIG. 2, a fulcrum portion 9 is engaged with the concave groove 5 of the rotating operation portion 3 at the base end portion of the tool body 6 as shown in FIG. 2 (see FIGS. 2 and 4). In the state (state), an operation point portion 8a that frictionally engages with the outer peripheral surface 4 of the rotated operation portion 3 is formed. In this example, the inner peripheral surface 8 of the tool body 6 is
The radius of curvature is the radius (D /
As shown in FIG. 2, the inner peripheral surface 8 is fitted to the outer peripheral surface 4 of the rotated operation part 3 and the operation lever 7 is set to the nut 2 as shown in FIG. When a pressing operation is performed in a rotation direction (hereinafter referred to as an “operation direction”) Ra to be rotated in a rotation direction (hereinafter, for convenience, the direction of tightening the nut 2 (tightening direction) R). At the inner peripheral surface 8
Is designed so that at least the base end portion 8a thereof is frictionally engaged with the outer peripheral surface 4 of the rotated operation portion 3. That is, the action point portion 8a is formed by the base end portion of the inner peripheral surface 8, and the action point portion 8a connects the fulcrum portions 9 of the tool body 6 to the rotated operation portion 3.
2 and the inner peripheral surface 8 of the tool main body 6 is fitted to the outer peripheral surface 4 of the rotated member 3 (the state shown in FIGS. 2 and 4; When the operation lever 7 is rotated in the operation direction Ra about the engagement portion between the fulcrum portions 9 and the concave grooves 5 in the "operable state"), the operation lever 7 It is designed to be pressed.

By the way, there are the following two methods for setting the tool 1 in a state in which it can be rotated. That is,
In the first setting method, as shown in FIG. 3, a fulcrum located at the foremost side of the inner peripheral surface 8 (hereinafter, other fulcrums 9,
9 when it is necessary to distinguish it from the fulcrum
By pivoting the operating lever 7 in the same direction as the operation direction Ra (the direction of the arrow shown in FIG. 3) with the engagement portion as a fulcrum, The fulcrum portions 9 are engaged with the concave grooves 5 and the inner peripheral surface 8 is fitted to the rotated operation portion 3. In order to release the rotatable operation state and remove the tool 1 from the rotatable operation section 3, the operation lever 7 may be rotated in the opposite direction to the above with the engagement portion as a fulcrum. Further, in the second setting method, the tool 1 is slid in the axial direction of the nut 2 in a state where one end of the tool body 6 is in contact with one end of the rotated operation portion 3, thereby supporting the fulcrum. 9 and the engagement of the inner peripheral surface 8 with the rotated operation portion 3 are performed simultaneously. The same slide operation as described above may be performed when the tool 1 is removed from the rotated operation unit 3 after releasing the rotation operation enabled state. Whether the first or second setting method is used can be arbitrarily selected according to conditions such as the shape of the tool main body 6 and the size of the peripheral space of the rotated operation unit 3. In this example, as shown in FIG. 2, the inner peripheral surface 8 has a semicircular shape, and the linear distance L between both ends is equal to the outer diameter D of the rotated operation portion 3.
, The tool 1 can be attached to and detached from the rotated operation unit 3 by any of the setting methods. In the case where the nut 2 is intermittently rotated by a relatively small angle while repeatedly attaching and detaching the tool 1, it is convenient to employ the first setting method, which is advantageous in terms of operation efficiency.

According to the rotary operating tool 1 configured as described above, the rotary operating tool 1 is turned into a rotatable state by the above-described first or second setting method, and then the operator operates the operating lever 7.
By gripping and rotating the nut 2 in the operation direction Ra, the nut 2 can be rotated in the tightening direction R.

That is, as shown in FIG.
Is pressed in the operation direction Ra, a rotational moment about the fulcrum 9 acts on the tool body 6, and the inner peripheral surface 8 is pressed.
Is applied to the outer peripheral surface 4 of the rotated operation portion 3, and the torque for rotating the nut 2 by the pressing force F (the torque of the rotation operation portion 3 which is the screw feeding center). A rotation moment about the center 3a) is generated, whereby the rotated operation portion 3, that is, the nut 2 is rotated in the tightening direction R.

By the way, in this state, as shown in FIG. 6, the tool 1 is a kind of lever (a point where a force is applied to the operation lever 7 by an operator is defined as a power point 7a, and a fulcrum 9 ...
And the concave groove 5 is defined as a fulcrum 9a, and an action point 8a
And the pressing force F acts in a direction orthogonal to a straight line 21 connecting the fulcrum 9a and the point of action (point of action) 8a.

Therefore, the angle α (hereinafter, referred to as “fulcrum / operation point interval”) formed by the straight lines 23 and 24 connecting the center 3a of the rotated operation portion 3 to the fulcrum 9a and the operation point 8a is α <18.
In the case of 0 °, as shown in FIG. 6, the pressing force F acts on the inner side (center 3a side) of the tangent (the tangent at the point of action 8a) 22 to the outer peripheral surface 4 of the rotated operation portion 3, that is, the pressing force. F acts on the outer peripheral surface 4 in a direction in which it is selfish.

As shown in FIG. 6, the pressing force F can be divided into a normal direction and a tangential direction with respect to the outer peripheral surface 4, and the normal component force Fc acts in the direction toward the center 3a. In other words, this normal component force Fc causes the point of action 8a to rotate against the tangential component Ft.
, A frictional engagement force fixed to the outer peripheral surface 4 is generated.
As a result, the tool 1 and the rotationally operated portion 3 are connected to each other so as not to be displaceable by the uneven engagement between the fulcrum portions 9 and the concave grooves 5 and the frictional engagement with the outer peripheral surface 4 of the action point portion 8a. become.
Therefore, in this state, when the operation lever 7 is rotated in the operation direction Ra, the rotated operated portion 3 is rotated in the tightening direction R accordingly.

On the other hand, when the interval α between the fulcrum and the operating point is α ≧ 180 °
In this case, the pressing force F does not act as described above, but acts outside a tangent 25 of the outer peripheral surface 4 (a tangent at the point of contact with the action point portion 8a) 25 as shown by a chain line in FIG. (Α =
In the case of 180 °, the acting line of the acting force is located on the tangent line 25) f acts. This acting force f is a normal component force f in a direction away from the center 3a of the rotated operation portion 3.
c (in the case of α = 180 °, no component is generated in the normal direction, and only the component ft (= f) in the tangential direction is generated). Therefore, depending on the acting force f, a frictional engagement force sufficient to fix the acting point portion 8a to the outer peripheral surface 4 of the rotated operation portion 3 does not occur, and the rotation operation of the rotated operation portion 3 by the tool 1 can be performed. Absent.

Therefore, in order to generate a torque for rotating the rotated operation portion 3, it is preferable to set the fulcrum-action point interval α to α <180 °. However, when the fulcrum / action point interval α becomes equal to or less than a certain value, there is a possibility that the fulcrum portions 9 may come off the concave grooves 5 when a force is applied to the operation lever 7. Further, as the fulcrum-action point interval α becomes smaller, the vertical distance from the center 3a to the pressing force F (the length of the arm of the rotational moment about the center 3a) becomes smaller. on the other hand,
Do not increase the operating lever length more than necessary (Tool 1
In order to reduce the lever operation force applied to the power point 7a (or to generate a larger pressing force F with a constant lever operation force) without increasing the total length of the lever 7a more than necessary), It is preferable to keep the point interval α small.

For these reasons, it is generally preferable to set the interval α between the fulcrum and the operating point to be 120 ° ≦ α <180 °. In the above-described tool 1, the tool main body 6 is set so that not only the second setting method but also the first setting method can be selected.
Is formed in a semicircular shape, so that the fulcrum 9a
In the case of the engagement point by the fulcrum part 9, the fulcrum-action point interval α
Is 180 °, which does not satisfy the above condition. However, since the inner peripheral surface 8 of the tool main body 6 is formed in an arc shape (semicircular shape) that substantially matches the outer peripheral surface shape of the rotated operation portion 3,
When a pressing force is applied to the operating lever 7 in the operating direction Ra, the fulcrum 9a for substantially determining the pressing force F is a fulcrum 9 on the most proximal side or a portion of the inner peripheral surface 8 in the vicinity thereof. The contact point α between the fulcrum and the action point is as close as possible to 180 °, but α <180 °.

Therefore, according to the above-described tool 1, the nut 2 can be satisfactorily rotated in the tightening direction R. In addition, a U-shaped portion (claw portion 101) that surrounds the outer peripheral surface of the rotated operation portion 103 having a hexagonal cross section over substantially the entire surface thereof.
a, 101a), the portions 6 and 7 have a sufficient strength and are reinforced by the ribs 1c.
The tool 1 can be made as compact as possible. Moreover,
Since the tool body 6 is of a curved shape fitted to a part of the outer peripheral surface 4 of the rotated operation portion 3 and occupies only a small space, the concave grooves 5 with which the fulcrum portions 9 engage are formed. In addition to the fact that the rotation operation can be performed while changing at a small pitch, the rotation operation of the nut 2 can be easily performed even when the space around the nut 2 or the rotated operation portion 3 is small. Furthermore, even if the tool main body 6 is deformed by applying a force to the operation lever 7, the deformation becomes a bending deformation in the direction of decreasing the radius of curvature of the tool main body 6, and the action point portion 8a Is displaced (deformed) in a direction in which the tool 1 is pressed against the outer peripheral surface 4 of the rotated operation portion 3. Therefore, the tool 1 and the plastic 1 are inferior in strength to metal. The connection state with the rotated operation unit 3 is not released. Therefore, as shown in FIG. 10 (B), a problem such as the opening spanner 101 in which a sufficient torque cannot be secured due to the deformation of the claw portion 101a does not occur, and the nut 2 is not tightened in the tightening direction R or in the opposite direction. The rotation operation can be performed satisfactorily and reliably.

It should be noted that the present invention is not limited to the above-described embodiment, and can be appropriately improved and changed without departing from the basic principle of the present invention.

For example, as described above, since the bending deformation of the tool main body 6 does not adversely affect the rotation operation of the tool 1 unless it is extreme, the tool main body 6 is positively or passively moved to some extent. The tool 1 can be deformed, and it is not necessary to increase the size of the tool 1 more than necessary in order to improve the strength of the tool 1.

In the tool 1 in which the tool body 6 is deformed to some extent, as shown in FIG.
The fulcrum-action point interval α can be set to 180 ° or more. That is, if the inner peripheral surface 8 of the tool main body 6 is formed into an arc shape of a semicircle or more that substantially matches the outer peripheral surface shape of the rotated operation portion 3, the tool main body 6 is pressed by the operation lever 7 in the operation direction Ra. The inner peripheral surface 8 is deformed to
The portion 8b other than the portion (a) may be pressed against the outer peripheral surface 4 of the rotated operation portion 3 also at the portion 8b.
That is, the inner peripheral surface 8 includes the first action point portion 8 which is the base end portion.
In addition to a, a second action point 8b is formed. The second action point portion 8b functions as an action point with respect to the fulcrum 9a, and the first action point portion 8a
Will function as a fulcrum for Therefore,
Even if the fulcrum / action point interval α based on the first action point portion 8a is 180 ° or more, the fulcrum / action point interval β between the second action point portion 8b as the action point and the fulcrum 9a and the fulcrum Both the fulcrum and action point interval γ between the second action point portion 8b as the first action point portion 8a and the first action point portion 8a as the action point are less than 180 °, and an appropriate pressing force is applied to each of the action point portions 8a and 8b. (Pressing force acting in the direction in which it penetrates into the outer peripheral surface 4) Fa,
Fb will work. As a result, even when α ≧ 180 °, the nut 2 can be satisfactorily rotated similarly to the above-described embodiment. by the way,
If the fulcrum-action point interval α exceeds 180 °, the inner peripheral surface 8
Is smaller than the outer diameter D of the rotated operation portion 3, but the tool body 6 can be deformed to a state where La = D (generally, if 180 ° ≦ α ≦ 200 °, The first setting method can be employed, and there is no particular limitation when only the second setting method is employed.

The object of the present invention is limited to a female screw member or a male screw member such as a union nut 2 having a circularly-rotated operating portion 3 having a knurled concave groove 5 as described above. However, any screw member can be used as long as the screw member has the rotatable operation portion 3 formed with a concave or convex portion that can be engaged and recessed so that the fulcrum 9 does not come off when a force is applied to the operation lever 7. Good. For example, even when the rotated operation portion 3 has a polygonal cross section (a hexagon, an octagon, or the like), a concave portion or a convex portion with which the fulcrum portion 9 can engage with the concave and convex portions exists at at least one position on the outer peripheral surface 4. I just need to. Of course,
The fulcrum portion 9 has a shape corresponding to a concave portion (a concave groove, a pin hole, or the like) or a convex portion (a protrusion, a pin, or the like) of the outer peripheral surface 4. Furthermore, when the rotated operation portion 3 has a polygonal cross section (for example, an octagon), even when no particular uneven portion is formed on the outer peripheral surface 4, as shown by a dashed line in FIG. By devising the shape, the corner portion 4a of the outer peripheral surface 4 can be used as a convex portion that the fulcrum portion 9 can engage with the concave and convex.
However, in any case, in determining the fulcrum / action point interval α, at least when the force is applied to the operation lever 7, the fulcrum 9 does not separate from the rotated operation part 3, and Working point 8a in the direction of biting into 4
On the condition that an acting force F (solid line in FIG. 8) is generated and an acting force f (two-dot chain line in FIG. 8) in the direction away from the outer peripheral surface 4 is not generated.

Further, as described above, the action points 8a and 8b may be formed on a part of the inner peripheral surface 8 of the tool main body 6, or may be protruded from the inner peripheral surface 8. That is, the action point portion 8
a and 8b may be such that the inner peripheral surface 8 is separated from the outer peripheral surface 4 of the rotated operation portion 3 except for the portion where the a and 8b are provided. Including such a case, the shape of the inner peripheral surface 8 is
A circle that matches or resembles the outer peripheral surface shape of the rotated operation unit 3;
The shape may be a polygon, a curved surface shape or a bent shape that does not match or resemble the outer peripheral surface shape. However, in order to simplify the tool shape, the inner peripheral surface 8 is made to have a shape that matches the outer peripheral surface shape of the rotated portion 3, and action points 8 a and 8 b are formed in a part of the inner peripheral surface 8. It is preferable to keep it.

Further, as shown in FIG. 9, a plurality of action points 8a, 8b, 8c and 8d are formed in the tool body 6 including an action point 8a constituted by a base end. The action points 8a, 8b, 8c, 8d may be arranged so as to individually function as action points for the driven sections 3 having different diameters. In this way, as shown in FIGS. 9A to 9D, it is possible to ensure versatility that can be used for a plurality of types of rotated operation sections 3. That is, FIG.
In the case of (A), only the operation point portion 8d frictionally engages with the outer peripheral surface 4 of the rotated operation portion 3, and in the case of FIG. In the case of FIG. 4C, only the action point portion 8b is frictionally engaged with the
(D), only the action point portion 8a frictionally engages with the outer peripheral surface 4 of the rotatable operation portion 3 in the case of FIG. The part 3 can also be rotated in the predetermined direction R by rotating the operation lever 7 in the operation direction Ra. In particular,
As shown by a chain line in FIG. 9, the inner peripheral surface 8 of the tool main body 6 is formed as a gathering surface of an infinite number of application points 8a (in such a shape that the entire inner peripheral surface 8 can function as an operation point). ), A plurality of types of the rotated operation portions 3 having slightly different diameter differences.
. Can be suitably used, and the versatility of the tool 1 is further improved. In this case as well, the fulcrum / action point interval α for each action point portion is set so as to satisfy the above-described condition.

Although the number of the fulcrum portions 9 is arbitrary, it is usually preferable to set the number to one to several. When a plurality of fulcrum portions 9 are provided, the shape of each fulcrum portion 9 can be made different according to the shape of the concave and convex portions formed on the rotated operation portion 3. For example, when a concave portion and a convex portion are formed close to each other on the outer peripheral surface 4 of the rotated operation portion 3, a convex fulcrum portion 9 that engages with the concave portion and a concave fulcrum portion 9 that engages with the convex portion. May be formed at the tip of the tool body 6.

The components of the tool 1 are also made of PFA, PFA, or the like according to the use conditions such as the material of the screw member 2 in addition to the above-mentioned PP.
PEEK, PES, PC, etc. can be arbitrarily selected. However, although it depends on the size, shape and the like of the tool 1, it is preferable to select a plastic material that can secure a strength that is at least as high as the above-mentioned function can be exhibited.

[0033]

As will be easily understood from the above description, according to the rotary operating tool of the present invention, although it is made of plastic which is inferior in strength to that of metal, A screw member such as a nut can be satisfactorily and easily rotated. Therefore, piping work or the like in a semiconductor manufacturing factory or the like that dislikes metal contamination can be performed without any trouble, and its practical value is extremely large.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a rotary operating tool made of plastic according to the present invention.

FIG. 2 is a side view showing a rotation operation state of a screw member (union nut) by the tool.

FIG. 3 is a side view showing a state in which the tool is attached to and detached from a rotated operation unit.

FIG. 4 is an enlarged view of a main part of FIG. 2;

FIG. 5 is a longitudinal rear view taken along the line VV of FIG. 2;

FIG. 6 is an operation explanatory view at the time of rotating the screw member by the tool.

FIG. 7 is an operation explanatory view corresponding to FIG. 6 in a mode different from FIG. 6;

8 is an operation explanatory view corresponding to FIG. 6 in a form different from FIGS. 6 and 7. FIG.

FIG. 9 is a side view showing a modification of the rotary operation tool according to the present invention.

FIG. 10 is a side view showing a conventional plastic rotary operation tool (spanner).

[Explanation of symbols]

1. Rotation operation tool, 2. Union nut (screw member),
Reference numeral 3 denotes an operated portion to be rotated; 4 an outer circumferential surface of the operated portion to be rotated; 5 a concave groove (a concave portion formed on an outer circumferential surface of the operated portion to be rotated); 6 a tool body; 7 an operating lever; 8: inner peripheral surface of the tool body, 8a, 8b, 8c, 8d: application point, 9: fulcrum, 9a: fulcrum.

Claims (1)

[Claims] 1. A rotary operating tool for rotating a screw member made of plastic having a circular or polygonal rotary operated portion having a concave portion or a convex portion formed on an outer peripheral surface thereof, comprising: a tool body; It is an integrated plastic product consisting of an operating lever connected to the base end. At the tip of the tool body, a fulcrum that engages with the concave or convex portion of the rotated operation part is formed. At the base end, an operation point portion that frictionally engages with the outer peripheral surface of the rotated operation portion in a state where the fulcrum portion is unevenly engaged with the concave portion or the convex portion of the rotated operation portion is formed, and the operating lever is a tool. The screw member is rotated by rotating the action point portion in a direction of pressing the outer peripheral surface of the rotated operation portion around the engagement portion between the fulcrum portion of the main body and the concave portion or the convex portion of the rotated operation portion. It is characterized by being configured to be able to Rotating operation tool made of plastic.