JP2000006037A - Turning tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To turn an article such as a screw shaft, lightly and highly efficiently. SOLUTION: A bending neck 4 which can be cranking bent is provided between a head part 2 and a handle part 3. The handle part 3 is made into a structure furnished with a rotatable grip tube 32. As a result, when the bending neck 4 is cranking bent, the handle part 3 is made in the parallel condition with the rotation axis of an inching bolt W. Consequently, the rotating operation of the inching bolt W can be carried out only by moving the handle part 3 circumferentially in the scope to allow to rotate the wrist side, as gripping the handle part 3 (the grip tube 32), that is, without converting the holding of the handle part 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turning tool used for rotating a rotating object such as a screw shaft.

[0002]

2. Description of the Related Art Conventionally, a reciprocating work fastener described in Japanese Utility Model Registration No. 3006784 (Japanese Utility Model Application No. 6-8553) has a head portion which can be externally engaged with a rotating object. A handle portion protruding radially outward from the head portion with respect to the rotating object.

[0003] The head portion has a disk shape having a fitting hole inserted into a rotating object at a central portion, and a shaft of the fitting hole is provided at three equally-spaced positions on the inner surface of the fitting hole in the circumferential direction. Cylindrical rollers parallel to the center are each held rotatably. In addition, these cylindrical rollers can move circumferentially within a predetermined range along the inner surface of the fitting hole, and when moving in one direction, protrude radially inward of the fitting hole and move in the other direction. Sometimes, it is retracted radially outward of the fitting hole.

That is, a one-way engaging mechanism is constituted by these components. When the handle portion is rotated in one direction in a state where the head portion is fitted to the object to be rotated, each cylindrical roller is rotated. The object to be rotated is chucked in a reduced diameter state and can be rotated. Further, if the handle is rotated in the reverse direction from this state, each cylindrical roller is in an expanded state and the object to be rotated can be released.

For example, when a suspended ceiling is constructed at a construction site or the like, when suspending a suspended tree, a suspended bundle, a facility pipe, or the like with respect to a ceiling base material, an operation of mounting a screw shaft in a downwardly projecting shape in advance is required. There is. The screw shaft used at this time is generally referred to as a "dimming bolt" or the like, and does not have a tool engaging portion such as a hexagonal head or a two-sided chamfer. Because of the convenience such that a predetermined hanging member can be attached with a plurality of nuts, it is frequently used in the above-mentioned field.
However, although the installation of the screw shaft does not require strong tightening, it is troublesome because the number of used screws is large and the operation is upward.

In view of such circumstances, in the above-mentioned fastening tool, a round rod-shaped cylindrical roller is provided on the inner peripheral surface of the fitting hole, and the rotating object is chucked by the cylindrical roller. Therefore, even if this is used for the rotation operation of the screw shaft, there is no risk of crushing the screw thread, and since the screw shaft does not need to be strongly tightened as described above, for the rotation operation of this screw shaft, The above-mentioned fastener was sometimes used.

[0007]

In the above-mentioned fastener, the operating direction of the handle portion is repeated within a predetermined range and reciprocally oscillated, whereby the one-way engagement mechanism is operated intermittently, and this is like a ratchet. Since the function is provided, the object to be rotated can be rotated in a forward feed state.

However, such a reciprocating swinging operation of the handle portion necessitates swinging the arm (elbow) with a large turning radius from the center of rotation of the rotating object to the shoulder of the worker. On the other hand, the above-described operation of rotating the screw shaft has a risk that the operation is rather troublesome and heavy labor. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a turning tool that can rotate a rotating object, such as a screw shaft, lightly and with high efficiency.

[0009]

According to the present invention, the following technical measures have been taken in order to achieve the above object. In other words, the turning tool according to the present invention has a head portion that can be externally engaged with the rotating object, and a handle portion that projects radially outward from the head portion with respect to the rotating object. A bent neck portion is provided between the head portion and the handle portion so that the handle portion can be crank-folded in a direction parallel to the rotation axis of the rotating object.

[0010] Here, "to bend the crank" of the bent neck means that the head portion is fitted to the rotating object, and the handle is provided on the outer peripheral side of the rotating shaft center of the rotating object. This means that the part can be moved circumferentially while being kept "parallel" to the axis of rotation. This is intended to enable the rotating object to be rotated by the circumferential motion without reciprocating the handle while the operator holds the handle.

Therefore, the radial distance from the rotation axis of the rotating object to the handle portion which is broken by the crank is determined as the moment by the rotation force when the operator applies the rotation force via the handle portion. The setting is such that the object can be easily rotated. In addition, the meaning of the term “parallel” between the rotation axis of the rotating object and the handle portion is not limited to the parallel state in a strict sense, but at most ± 45 ° based on this parallel state, preferably Is included in a range of about ± 30 ° (more preferably, about ± 15 ° in terms of operability) (that is, a predetermined angle centered on 90 ° as the crank angle range). Range allowed).

[0012] From the above, it is possible to satisfactorily rotate the rotating object by using the turning tool,
The operating radius of the turning tool is also reduced, and the burden on the operator can be reduced. When the handle portion has a structure having a core shaft having one end bent to the neck portion and a gripping tube rotatably held around the core axis, when the operator grips the handle portion, Will hold the grip tube.

Therefore, when the handle portion is moved circumferentially, the gripping tube rotates around the core axis in the opposite direction, so that the operator does not need to change the handle portion each time. Get better. Therefore, the rotation operation can be performed more favorably. If the head has a built-in one-way engaging mechanism as described in the related art, the turning tool can be used for a rotating object such as a screw shaft. Therefore, it is possible to provide significance regarding the provision of the bent neck portion, the provision of the rotatable grip tube in the handle portion, and the like.

If the head portion is configured to be able to be externally fitted to the object to be rotated from both sides, the direction in which the head portion is externally fitted to the object to be rotated can be changed.
The turning tool can be used not only for tightening the rotating object but also for loosening the rotating object. And in this case, the broken neck is also
By making the crank part bendable in both front and back directions from the neutral state where the handle part protrudes in the radial direction of the rotating object,
The above-described good rotation operation can be obtained both when the rotating object is tightened and when the rotating object is loosened.

In the case of a bent neck portion, if a locking urging mechanism for maintaining a predetermined state of the crank of the handle portion with respect to the head portion is provided, the crank bending angle can be quickly increased.
There is an advantage that the setting can be performed accurately and reliably, and that the head portion or the handle portion can be prevented from wobbling after the setting, so that the handling as a turning tool becomes easy.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show a first embodiment of a turning tool 1 according to the present invention. This turning tool 1
Has a head portion 2 and a handle portion 3 projecting from the head portion 2, and a bent neck portion 4 is provided between the head portion 2 and the handle portion 3. .

As shown in FIGS. 2 and 3, the head 2
Has a built-in one-way engagement mechanism 5. That is, the one-way engaging mechanism 5 includes a hollow disk-shaped (short cylindrical) main body case 6, a rotatable cylinder 7 rotatably housed in the main body case 6, and a rotatable cylinder 7.
A cylindrical roller 8 fitted and held by a plurality of vertically long windows 7a formed at equal circumferential positions (three positions in the illustrated example), and a thrust ring 9 for abutting one end of the cylindrical roller 8 And a retaining ring 10 for preventing escape of the thrust ring 9.

Therefore, the inner side of the rotary cylinder 7 (each cylindrical roller 8
Between the inward side surfaces of the rotating object W). This fitting hole 1
Numeral 2 penetrates the head portion 2. In addition,
Assuming that the side on which the retaining ring 10 is provided is “front surface 2 a” in the head portion 2, the “back surface 2 b” on the opposite side is provided.
Is provided on the body case 6 with an inner flange 13 protruding inward over the entire inner peripheral portion.
However, the other end of the cylindrical roller 8 is abutted against the cylindrical roller 8 and the rotating cylinder 7 is prevented from coming off.

In the main body case 6, at one of the inner peripheral surfaces thereof, at one of the cylindrical roller 8 holding positions, one side in the circumferential direction is gradually made shallow inward in the radial direction, and the other side is made radially inward. An arc-shaped concave portion 15 that gradually becomes deeper outward is provided. Therefore, each cylindrical roller 8 is movable along the circumferential direction of the fitting hole 12 within the range of each arc-shaped concave portion 15, and the fitting hole 12 is moved with this circumferential movement.
It can also be moved in and out in the radial direction.

For this reason, when the head portion 2 is fitted around the rotating object W and then rotated around the rotating object W, the cylindrical roller 8 moves toward the shallow portion of the arc-shaped concave portion 15. Direction (the direction of rotation of the head 2 is shown in FIG. 2).
In this case, the cylindrical roller 8 protrudes radially inward of the fitting hole 12 and consequently the fitting hole 12 is reduced in diameter. It can be made to be.

On the contrary, in the direction in which the cylindrical rollers 8 move toward the deep portion of the arc-shaped concave portion 15 (when the rotation direction of the head portion 2 is the Y direction in FIG. 2), these cylindrical rollers 8 8 retracts radially outward of the fitting hole 12 and consequently enlarges the diameter of the fitting hole 12, whereby the rotating object W can be released. In contrast to such a head portion 2, the bent neck portion 4 is provided when the head portion 2 is fitted to the rotating object W, and the handle portion 3 is moved radially outward with respect to the rotation axis of the rotating object W. In a normal state, the handle portion 3 is held in a neutral position, and the handle portion 3 is bent in a direction parallel to the rotation axis of the rotating object W as shown in FIG. Is what makes it possible.

The specific structure of the bent neck 3 is as follows.
As shown in FIGS. 2 and 4, a bending fulcrum shaft 20 provided in a direction perpendicular to both the center of the fitting hole 12 in the head portion 2 and the axis of the neck shaft 21 at the same time,
A neck shaft 21 for holding the bending fulcrum shaft 20 at a position at a predetermined distance from the head portion 2, and a handle portion 3 rotatably connected to the neck shaft 21 via the bending fulcrum shaft 20. And the core shaft 23 is formed.

In the first embodiment, a pair of holding pieces 24 projecting bifurcated from each other so as to be able to support both ends of the bending fulcrum shaft 20 are provided on the core shaft 23 side. A hinge piece 25 that can be inserted between the holding pieces 24 is provided, and the holding piece 24 and the hinge piece 25 are held in a skewered manner by the bending fulcrum shaft 20. However, a pair of holding pieces 24 may be provided on the neck shaft 21 side, and a hinge piece 25 may be provided on the core shaft 23 side.
A hinge piece projecting eccentrically from both the side and the neck side 21 may be provided, and these may be joined side by side.

The length of the neck shaft 21 is set so that the distance from the center of the fitting hole 12 in the head portion 2 to the bending fulcrum shaft 20 is about 37 mm. Is applied, the distance by which the object to be rotated can be rotated as a moment due to this force. The worker can rotate the rotating object with a small operation by rotating the wrist side with the elbow as a fulcrum while holding the handle portion 3.

The bent neck portion 4 has a neck shaft 21 and a core shaft 23.
A locking urging mechanism 27 is provided between the head unit 2 and the handle unit 3 for holding the crank portion in a bent state (including the neutral position described above) with respect to the head unit 2 in a predetermined manner. The locking urging mechanism 27 employs a so-called ball push structure. A bullet-shaped stopper piece 28 is provided between the holding pieces 24 of the core shaft 23 toward the bending fulcrum shaft 20 by a spring 2.
9, the stopper piece 28 is provided at a plurality of positions on the outer peripheral surface of the hinge piece 25 in the neck shaft 21.
And a positioning concave portion 30 which engages with the groove.

The number of positioning recesses 30 and their positioning are set at a total of three locations: a central position coincident with the axis of the neck shaft 21 and a position 90 ° apart from each side of the central position. Therefore, the handle portion 3 has a neutral position shown in FIG. 2, a position facing the back surface 2b of the head 2 as shown in FIG.
On the opposite side (not shown) of 0 °, it can be set to three positions: a position facing the surface 2a of the head 2 and a position parallel to the rotation axis of the rotating object W.

The handle portion 3 has a structure in which a gripping tube 32 is externally fitted to the core shaft 23 described above. The gripping cylinder 32 has a cylindrical shape having an open end on the core shaft 23 side and a closed end on the other end side, and an annular groove 33 provided on an inner surface near the open end. On the other hand, a bullet-shaped retaining pin 35 is provided on the core shaft 23 toward the annular groove 33 in a state where the bullet-shaped retaining pin 35 is pressed and biased by a spring 36, thereby constituting a retaining mechanism 37 for the gripping cylinder 32. Have been.

Accordingly, the grip cylinder 32 is rotatable around the core shaft 23 without getting out of the core shaft 23. The outer peripheral surface of the grip cylinder 32 is provided with a non-slip such as a knurl. In the turning tool 1 having such a configuration, as shown in FIG.
The fitting hole 12 of the head portion 2 is fitted to the rotating object W with the surface 2a of the head 2 facing the rotating object W.

Then, at the bent neck 4, the head 2
The crank is broken so that the handle portion 3 faces downward. In this state, the operator can handle 3 (grip cylinder 3).
2), the handle portion 3 is moved around the rotating object W in a clockwise direction (X direction in FIG. 2) around the rotating object W. Therefore, the one-way engagement mechanism 5 chucks the rotating object W and rotates it in the tightening direction as it is.

At this time, the circumferential movement of the handle portion 3 can be performed only by the operation of rotating the wrist side without substantially moving the elbow position of the hand (arm) holding the handle portion 3, and is extremely simple. At the same time, it can be performed with high efficiency. When it is necessary to loosen or remove the rotating object W, the handle 3 is turned counterclockwise (FIG. 2).
(The Y direction), the one-way engagement mechanism 5 is disengaged by a slight circumferential movement, the head part 2 is once removed from the rotating object W, and then the head part 2 is turned upside down. The back surface 2b is directed toward the object to be rotated W, and the fitting hole 12 of the head portion 2 is externally fitted to the object to be rotated W again.

Also, at this time, the bent neck 4
The crank is bent so that the handle portion 3 faces downward from the head portion 2. In this state, the operator can handle 3
The handle portion 3 may be circumferentially moved around the rotating object W in the counterclockwise direction while holding the (grip cylinder 32). As a result, the one-way engagement mechanism 5 chucks the rotating object W and rotates it in the loosening direction.

FIG. 5 shows a second embodiment of the bent neck portion 4 that can be employed in the turning tool 1 according to the present invention. In the bent neck portion 4 of the second embodiment, a pivot washer made of a spring washer, a coil spring, a wave washer, a rubber disk, and the like is provided between the contact surface of the hinge piece 25 of the neck shaft 21 and the holding piece 24 of the core shaft 23. A resistor 40 is interposed. Further, in the ball push structure adopted as the locking urging mechanism 27, the stopper piece 28 is just a sphere.

That is, in the bent neck portion 4, the neck shaft 21
There is no backlash between the (hinge piece 25) and the core shaft 23 (holding piece 24), but rather a certain degree of rotation resistance is accompanied. Therefore, even when the stopper pieces 28 are engaged with the positioning recesses 30 as well as when they are not engaged, the crank breaking state of the handle portion 3 with respect to the head portion 2 is maintained to some extent. Therefore, the degree of freedom in use is increased. In addition, since the space between the head portion 2 and the handle portion 3 is not easily shaken, there is an advantage that the handleability is improved.

FIGS. 6 to 9 show a turning tool 1 according to the present invention.
3 shows a third embodiment as a bent neck portion 4 that can be used for the present invention. In the bent neck portion 4 of the third embodiment, a pair of holding pieces 24 are provided on the neck shaft 21 side, and a hinge piece 25 is provided on the core shaft 23 side, and these holding pieces 24 and the hinge piece 25 are bent at a fulcrum. The shaft 20 is held in a skewered shape.

The locking urging mechanism 27 provided for the bent neck 4 has the following structure. That is, the collar 21 is provided with a stopper flange 42 that protrudes around the outer periphery close to the holding piece 24,
The core shaft 23 is provided with a spring stopper flange 43 protruding around the outer periphery separated from the hinge piece 25 by a predetermined distance.

A cylindrical sleeve member 45 having both ends open is provided so as to fit around a portion extending between the contact stopper flange 42 and the spring stopper flange 43, and inside the sleeve member 45. , A spring stopper collar 46 protruding inward near the neck shaft 21 is provided. A spring 47 is mounted between the spring stopper flange 43 of the core shaft 23 and the spring stopper flange 46 of the sleeve member 45.

Further, the sleeve member 45 is provided with two parallel through-grooves 49 at both side positions away from the center of the outer peripheral end toward the neck shaft 21. Accordingly, the sleeve member 45 is slidable mainly around the core shaft 23 along the axial direction thereof, and the neck shaft 21 and the core shaft 2 are slidable.
3 is in a straight line, the urging force of the spring 47 causes the spring stopper collar 46 of the sleeve member 45 to abut against the stopper collar 42 of the neck shaft 21 and stop there (see FIG. 6). ).

At this time, the sleeve member 45 is
Not only that, but also the neck shaft 21 is externally fitted, the linear relationship between the neck shaft 21 and the core shaft 23 is maintained (that is, the crank cannot be broken). Also,
When the crank shaft 23 (that is, the handle portion 3) is torn with respect to the neck shaft 21 (that is, the head portion 2), the sleeve member 45 is pulled back to the core shaft 23 side in advance.

When the sleeve member 45 is released after the crank breaks, the sleeve member 45 abuts against the neck shaft 21 from the side by the urging force of the spring 47 and stops (FIG. 7).
At this time, the one through groove 49 of the sleeve member 45 is fitted from the side to the stopper flange 42 of the neck shaft 21. Therefore, the neck shaft 21 and the core shaft 23
Is also maintained without rattling even when the crank is broken, so that the rotating operation of the rotating object W can be favorably performed.

The outer peripheral surface of the sleeve member 45 is provided with a knurl or the like. Further, although not shown, it is preferable that the sleeve member 45 is slid in the axial direction with respect to the core shaft 23 by an appropriate rotation preventing structure so that the sleeve member 45 is held unrotatably. FIGS. 10 to 13 show a fourth embodiment as a bent neck portion 4 that can be employed in the turning tool 1 according to the present invention.

The bent neck 4 of the fourth embodiment is provided with a locking urging mechanism 27 having the same operating principle as that of the third embodiment. However, the difference from the locking urging mechanism 27 of the third embodiment is that the sleeve member 4
5 is provided with a pair of insertion pieces 52 at both side positions away from the center of the outer peripheral end toward the neck shaft 21.
When the core shaft 23 (ie, the handle portion 3) is crank-broken with respect to the (ie, the head portion 2) (see FIGS. 11 and 12).
), The insertion piece 52 includes the hinge piece 25 and the neck shaft 21.
In that it is adapted to be inserted into the gap with the abutment collar 42.

In the sleeve member 45, because of the provision of the insertion piece 52, the portion that has been the spring retaining flange 46 in the third embodiment is different from the spring retaining step portion 53 in that it is a spring retaining step 53. ing. Other configurations and operational effects are substantially the same as those of the third embodiment. In the second and third embodiments, the stopper flange 42 may be provided on the core shaft 23 side, and the spring stopper flange 43, the sleeve 45, the spring 47 and the like may be provided on the neck shaft 21 side. is there.

The present invention is not limited to the above embodiments. For example, the head unit 2 may be a box or the like for a bolt, a nut, or the like having a tool engaging portion such as a hexagonal head or a two-sided chamfer. Therefore, the one-way engagement mechanism 5 may be one that employs a general ratchet mechanism assembled using feed claws directed in one direction.

The application of the turning tool 1 according to the present invention is as follows.
There is no particular limitation, and it is of course possible to use the neck shaft and the core shaft in a straight line as in the past.

[0045]

As is apparent from the above description, in the turning tool according to the present invention, the handle can be bent between the head and the handle in a direction parallel to the rotation axis of the rotating object. Since the bent neck portion is provided, when the operator grips the handle portion, the handle portion can be circumferentially moved only by rotating the wrist. Therefore, the rotating object can be rotated lightly and with high efficiency.

If the handle cylinder is made rotatable in the handle portion, the grip cylinder will idle in the opposite direction when the handle portion is moved in the circumferential direction. It is not necessary to hold the handle, and the rotation operation can be performed more favorably. By incorporating the one-way engagement mechanism in the head portion, a screw shaft can be targeted as a rotating object, and this turning tool can be used most effectively.

If the head is configured so that it can be externally fitted to the object to be rotated from both the front and back, and if the bendable neck can be bent in both directions, the head can be externally fitted to the object to be rotated. By making the direction to be different,
This turning tool can be used not only when tightening the rotating object but also when loosening the rotating object.

If a locking urging mechanism is provided at the bent neck for maintaining the crank bending angle of the handle with respect to the head at a predetermined angle, handling as a turning tool is facilitated.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a use state of a turning tool according to a first embodiment of the present invention.

FIG. 2 is a plan view showing the turning tool of the first embodiment in a partially crushed state.

FIG. 3 is an enlarged side sectional view taken along line ABC of FIG. 2;

FIG. 4 is an enlarged side view showing a broken neck portion of the turning tool according to the first embodiment, partially broken.

FIG. 5 is a partially broken plan view showing a second embodiment as a broken neck portion that can be employed in the turning tool according to the present invention in an enlarged manner.

FIG. 6 is a partially broken side view showing, in an enlarged manner, a third embodiment as a bent neck portion that can be employed in the turning tool according to the present invention.

FIG. 7 is a partially crushed side view showing a state in which a broken neck is crank-broken from the state of FIG. 6;

FIG. 8 is a view taken along line DD in FIG. 7;

FIG. 9 is a perspective view showing a sleeve member used in the third embodiment.

FIG. 10 is a partially broken side view showing, in an enlarged manner, a fourth embodiment as a bent neck portion that can be employed in the turning tool according to the present invention.

FIG. 11 is a partially crushed side view showing a state in which a bent neck portion is crank-broken from the state of FIG. 10;

FIG. 12 is a view taken along line EE in FIG. 11;

FIG. 13 is a perspective view showing a sleeve member used in the fourth embodiment.

[Explanation of symbols]

 Reference Signs List 1 turning tool 2 head 3 handle 4 bent neck 5 one-way engagement mechanism 23 core shaft 27 locking urging mechanism 32 gripping cylinder W rotating object

Claims (5)

[Claims] 1. A head portion (2) engageable with an object to be rotated (W) so as to be fitted to the object to be rotated, and protruding from the head portion (2) radially outward with respect to the object to be rotated (W). And a handle portion (3) provided between the head portion (2) and the handle portion (3). The handle portion (3) is cranked in a direction parallel to the rotation axis of the rotating object (W). A turning tool, characterized in that a folding neck (4) is provided to enable folding. 2. The handle (3) has a shaft (23) having one end bent to a neck (4), and the shaft (23).
2. The turning tool according to claim 1, further comprising a gripping cylinder rotatably held about the turning cylinder. 3. The head portion (2) is reduced in diameter when rotated in one direction while being externally fitted to the rotating object (W), and is expanded when rotated in the other direction. 3. The turning tool according to claim 1, wherein a one-way engagement mechanism (5) is incorporated. 4. The head part (2) includes a rotating object (W).
The bent neck portion (4) can be externally fitted from both the front and back sides, and the bent neck portion (4) can be moved from the neutral state in which the handle portion (3) projects from the head portion (2) in the radial direction of the rotating object (W). The handle portion (3) can be crank-cracked in either direction.
The described turning tool. 5. The bending neck (4) is provided with a locking urging mechanism (27) for maintaining a predetermined crank bending state of the handle (3) with respect to the head (2). The turning tool according to any one of claims 1 to 4, wherein