JP5544673B1 - Tool holder - Google Patents

Abstract

A ratchet type screw tightening tool capable of adjusting a tightening torque of a screw by using a clutch means.
A tool holder includes a base, a circular recess formed at a position where the center line of the base is concentric, and a ratchet provided with ratchet means rotatably inserted in the recess. The drum 5, the clutch means 7 for blocking the rotation of the ratchet drum until a predetermined rotational force is applied to the ratchet drum from the rotating part of the screw tightening tool by pressing the drum, and the center line of the base A mounting portion that is formed in a concentric position and is detachably mounted on the rotating portion of the screw tightening tool, and a connecting portion that is detachably mounted on a socket that is detachably mounted on the screw. .
[Selection] Figure 2

Description

The present invention relates to a tool holder, and more particularly, to a tool holder in which a tightening torque can be adjusted and a screw can be easily tightened by providing a clutch means and a ratchet means on the tool holder. A tool holder that can be detachably attached to a tool holder such as a die, a reamer, etc., so that the cutting tool is not easily damaged, and a workpiece can be easily cut with the cutting tool. It is about.

Conventionally, a commercially available torque wrench, wrench such as a ratchet wrench, etc. and a tightening socket are attached to a screw tightening tool such as a wrench, and bolts, nuts, screws, etc. are tightened with a wrench, spanner, etc. The tool handle is turned, but at the moment when the specified tightening torque is approached, the operation to stop the rotation of the handle with force is not stable, and if it is tightened too much, There is a risk that the head may be damaged or the screw in use may be broken, and if the tightening is loose, the screw may be loosened during use.

In addition, when these screw tightening tools are equipped with a meter, memory, and gauge, it is necessary to stop the tightening operation and the rotation operation of the handle while looking at the meter, etc. In addition to the lack, a predetermined tightening torque cannot be obtained.

As for cutting tools, conventionally, workpieces are cut using dedicated holders and handles suitable for cutting tools such as taps, dies, and reamers, but if an overload occurs in the cutting tool, There was a problem that the tool was damaged.

The use of the cutting tool has a problem that the cutting operation must be stopped before an overload occurs, and the operation is not stable.

In addition, the screw tightening tool provided with a meter, memory, and gauge, and the handle dedicated to the cutting tool are not provided with a ratchet mechanism, and the operation of rotating these tools is complicated and takes time. There was a problem of lack of work efficiency.

The ratchet wrench as shown in Patent Document 1 is not provided with a clutch means, and a tightening socket is attached and a handle is turned to tighten bolts, nuts, screws, etc. The operation to stop the rotation of the handle at the moment of approaching the specified tightening torque is not stable, and if it is tightened too much, the head of the bolt may be damaged or the screw may be broken during use. In addition, if the tightening is loose, there is a problem that the screw may loosen during use, and this variation also occurs due to the speed with which the ratchet wrench is operated and the force applied during operation. Such a device such as an engine tightened using a ratchet wrench has a problem that performance is not stable.

JP 2003-251570 A

The present invention solves the above-described conventional problems, and by using the clutch means, it is possible to adjust the tightening torque of the screw, there is little variation in the tightening torque of the screw, a predetermined tightening torque is obtained, and the ratchet means is provided. When used, the screw can be easily tightened, and a cutting tool such as a tap, a die, or a reamer can be detachably attached to the tool holder. A tool holder that can easily cut a workpiece with a tool is provided.

In order to solve the above problems, a tool holder of the present invention includes a base, a circular recess formed at a position where the center line of the base is concentric, and a ratchet means that is rotatably inserted into the recess. And a clutch means for preventing the rotation of the ratchet drum until a predetermined rotational force is applied to the ratchet drum from a rotating portion of a screw tightening tool by pressing the ratchet drum, and a center of the base A mounting portion that is formed at a position where the wires are concentric and the rotating portion of the screw tightening tool is detachably mounted; and a connecting portion that is detachably mounted on a socket that is detachably mounted on the screw. It is characterized by that.

The tool holder of the present invention includes a base, a circular recess formed at a position where the center line of the base is concentric, and a ratchet drum that is rotatably inserted into the recess and provided with ratchet means. A position where the center line of the base is concentric with a clutch means for pressing the ratchet drum to prevent rotation of the ratchet drum until a predetermined rotational force is applied to the ratchet drum from the rotating portion of the screw tightening tool And a connecting portion that is detachably attached to a rotating portion of the screw tightening tool and a connecting portion that is detachably attached to a socket that is detachably attached to the screw. Therefore, by simply turning the tool holder base with a torque wrench, tightening tool, handle, etc., you can repeat the work until the ratchet drum is idle, and you can turn it with the tightening tool or handle. The work is simplified and the work man-hours are remarkably reduced, and the screw tightening torque can be adjusted, so that even a non-skilled amateur can obtain a predetermined tightening torque. There is an effect that can be ensured, and further, a cutting tool such as a tap, a die, a reamer, etc., which can be detachably attached to the tool holder, is difficult to damage the cutting tool, There is an effect that a tool holder capable of easily cutting a workpiece with a cutting tool can be provided.

According to a second aspect of the present invention, the clutch means includes a holding bolt that is screwed into a screw hole formed in the base, and the tip of the holding bolt presses the circumferential drum of the latitudinal drum, thereby If the clutch means is operated by tightening the screw with a screw tightening tool until the tip of the bolt slides on the circumference of the ratchet drum, it is only necessary to tighten the screw until the ratchet drum slides against the clutch means. The screw can be tightened with a predetermined torque with very little variation, and there is no need to stop the tightening work and the rotation operation of the handle while looking at the meter, etc., and the work is stable and efficient. There is an effect that the screw tightening work can be ensured even by an unskilled amateur. Also, tightening work while looking at the meter, etc., to reach a predetermined torque, and by checking the memory of the torque at the moment when the pressing piece of the holding bolt slides on the peripheral drum of the ratchet drum, more stable torque can be obtained. The method of securing is also acceptable.
Further, as in claim 3, when the clutch means are provided to face each other at a position 180 degrees apart, the rotation can be prevented by the linear pressure at two locations with one clutch means. Thus, there is an effect that the ratchet drum can be securely held and variation in tightening torque can be further reduced.
According to a fourth aspect of the present invention, the clutch means includes a holding bolt screwed into a screw hole drilled toward the center line of the base, and a pressing piece provided with a spring at the tip of the holding bolt. If the pressure piece is pressed against the circumferential drum of the ratchet drum, even if the tip of the pressure piece is worn, it will be corrected by the spring and will be in close contact with the circumference of the ratchet drum. Becomes the clutch control force of the ratchet drum, and has the effect of maintaining the control force with high accuracy.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS.
The tool holder 1 of the present invention is configured such that the base 2A and the drive unit 2K are separable, and the circular recess 3 formed at a position where the base 2A and the center line S of the base 2A are concentric. A ratchet drum 5 rotatably inserted into the recess 3 via a bearing 4 and provided with ratchet means 5A, and the ratchet drum 5 is pressed against the ratchet drum 5 from the rotating portion 6 of the screw tightening tool K. The clutch means 7 for preventing the rotation of the ratchet drum 5 until the rotational force is applied, and the rotating portion 6 of the screw tightening tool K are detachably mounted at a position concentric with the center line S of the base 2A. And a connecting portion 10 that is detachably attached to a socket 9 that is detachably attached to the screw N, and the clutch means 7 is drilled toward the center line S of the base 2A. The holding bolt 12 screwed into the screw hole 11 By turning the tightening tool K or the handle 2H until the end is pressed against the peripheral drum of the ratchet drum 5 and the tip of the clutch means 7 slides on the peripheral drum of the ratchet drum 5, screw tightening and cutting tools are used. It is comprised so that cutting work can be performed. The handle 2H is attached to screw portions V provided at two locations on the base 2A so that the handle 2H can be gripped with both hands. The screw tightening tool K may be a manual type or an electric type.

The base 2A is formed of a steel material in a columnar shape. Although the outer peripheral cylinder is formed in a circular shape, it may be formed in a hexagonal shape.

The recess 3 is formed with a bottom on the base 2A, and a ring-shaped bearing 4 made of a copper alloy, a commercially available metal material, and a commercially available dry bearing is press-fitted into the inner wall surface of the recess 3, The size of the base 2A and the ratchet drum 5 are smoothly rotated with a small force. The bearing 4 of the embodiment is formed in a connected ring shape. The base 2A and the drive unit 2K are positioned by two pins 2P provided on a diagonal line passing through the center line S of the base 2A, and provided on a diagonal line passing through the center line S of the base 2A. These are integrated with two screws 2N. The ring-shaped bearing 4 becomes unnecessary by making the inner surface of the recess 3 have the function of a bearing. The base 2A and the drive unit 2K are integrated by the two pins 2P and the two screws 2N, but may be integrated by the four screws 2N. The screw 2N is screwed into the screw hole 2Na, and the pin 2P is inserted into the insertion hole 2Pa.

In the tool holder of the present invention, the base 2A and the drive unit 2K are formed separately, and the base 2A and the drive unit 2K are assembled and the drive unit 2K is removed and used. As shown in FIG. 23, the base 2A and the drive unit 2K are not separate and may be formed integrally with the base 2A.

The ratchet drum 5 is formed in a columnar shape, is inserted into the recess 3 so as to be flush with the base 2A, and the connecting portion 10 protrudes to a position where the center line P of the ratchet drum 5 is concentric. Is formed. The ratchet drum 5 includes a ratchet drum body 5A formed of a steel material in a columnar shape, a ring 5B provided on the outer periphery of the ratchet drum body 5A and made of a high-grade material such as a hard steel material or cemented carbide, and a ratchet drum body 5A. 5C, a claw 5D, and a forward / reverse rotation switching lever 5E. The ratchet means 5F is composed of a stopper 5C, a claw 5D, and a forward / reverse rotation switching lever 5E, and has the same structure as that provided on a commercially available ratchet wrench, etc. It can be incorporated. The connecting portion 10 is provided with a ball 10A protruding from the side surface of the connecting portion 10 and a spring body 10B that pushes the ball 10A outward. The ring 5B is made of a highly advanced material such as a hard steel material or a cemented carbide, and is preferably not easily damaged. The ratchet drum body 5A and the ring 5B are prevented from slipping by press-fitting, welding stop, pin stop and the like.
Further, the ratchet drum main body 5A and the ring 5B may be an integrated body made of hard steel. The thrust load during rotation of the ratchet drum body 5A is received by a thrust metal 2M formed of a copper alloy, a commercially available metal material, etc., so that the base 2A can be downsized and the ratchet drum 5 can smoothly rotate with a small force. It is envisaged.

The clutch means 7 is constituted by a holding bolt 12 screwed into a screw hole 11 drilled toward the center line S of the base 2A. Each holding bolt 12 has a hexagonal hole 12A in which a hexagonal wrench is mounted on the upper surface. The clutch means 7 is provided at a position 180 degrees away from each other toward the center line S of the base 2A. The clutch means 7 presses the periphery of the ratchet drum 5 with the clutch means 7. Since the rotation is blocked by the line pressure in contact with the peripheral drum of the ratchet drum 5, there is an effect that the accuracy is high. The clutch means 7 configured to press the circumferential drum of the latitudum drum 5 with the tip of the presser bolt 12 has no obstacle when operating the clutch means 7 and has good operability, and the handle 2H of the base 2A is provided. The tool holder can be made compact because it is arranged in a space where it is not used effectively by providing the clutch means 7 at a position shifted by 90 degrees with respect to the screw part V provided at the two places to be mounted. There is an effect that.

A line passing through the center of the clutch means 7 on the inner wall of the bearing 4 is a center line, and each of the relief portions 4C is an area of 60 degrees to the left and right, and is retracted from the original inner wall of the bearing 4 in the area of 120 degrees. It is provided facing two places at the top and bottom. By providing the relief portion 4C, the inner periphery of the ratchet drum 5 is formed by the two inner diameter portions of the bearing 4 serving as the starting point of the relief portion 4C with one holding bolt 12 and the pressing line of the one holding bolt 12. It is possible to press with a wire, and the clutch means 7 can be configured by using one holding bolt 12.
Further, the screw tightening torque can be adjusted by the clutch means 7 only by tightening the presser bolt 12 at one place, and the working efficiency is remarkably improved.

The upper and lower holding bolts 12 are provided with a large size 12L and a small size 12S, so that the pressing force of the ratchet drum 5A, that is, the control force of the clutch 7 means is large and small. Thus, it becomes possible to press the circumferential drum of the latitudrum drum 5B with an optimal pressing force.

The pressing piece at the tip of the holding bolt 12 presses the ratchet drum 5A. As shown in FIG. 20, the pressing piece is a piston type with a spring inserted and is of type 12LP formed of a high hardness material or a copper alloy material. 21SP, as shown in FIG. 21, a swingable sphere with a spring inserted therein, types 12LT and 12ST formed of a high hardness material, and a swing inserted with a spring as shown in FIG. There is a 12LH and 2SH type formed of a high hardness material or a copper alloy material in a sphere that is freely formed and has a flat portion at a part of the tip, and the holding bolt 12 is shown in FIGS. What is necessary is just to select from the types as shown in FIG. 22 according to a use, respectively.

A flat part is provided in a part, and a spherical type and a spherical type are also commercially available with coarse screws, but the commercially available fine screw holding bolt 12 made of steel is a piston type, and the pressing force can be finely adjusted. There is an effect that there is.

The clutch means 7 is described as being provided at a position 180 degrees away from each other toward the center line S of the base 2A. However, the clutch means 7 is provided at a position 120 degrees apart. The outer periphery of the ratchet drum 5 is uniformly pressed at two locations by the presser bolt 12 at intervals of 120 degrees with the presser bolt 12, and the pressed side is in line contact, and the ratchet drum 5B and the base 2A are Since it is a line contact for the length of sliding contact with the bearing 4 and is not a surface contact but a line contact, it becomes a sensitive and highly accurate clutch function. If the torque is set in advance with the holding bolt 12 and tightened with screws, the clutch slips when the set torque is reached, and there is an effect that a highly accurate torque with little variation with respect to the set value can be secured.

Further, by providing three clutch means 7 at positions 120 degrees apart from each other, the rotation of the ratchet drum 5A may be prevented until a predetermined rotational force is applied to the ratchet drum 5A from the rotating portion 6 of the screw tightening tool K. There is nothing. The clutch means 7 is composed of a holding bolt 12 screwed into a screw hole 7 drilled toward the center line S of the base 2A, and presses the ratchet drum 5B with the tip of the holding bolt 12. The presser bolt 12 screwed into the screw hole 7 drilled in a direction slightly deviated from the direction toward the center line S of the base 2A may be used.

Further, the clutch means 7 urges a ball 63 that engages with an engagement hole provided in the clutch plate 61 as shown in Japanese Patent Application Laid-Open No. 2000-5911 toward the clutch plate 61 by a spring 64, and an overload is caused. In such a case, the screw 63 may be retracted against the spring 64 so as to ride on the clutch plate 61, and the screw may be tightened with a necessary torque. In this case, the friction generated between the clutch plate 61 and the ball 63 is caused by surface contact. Even if the pressing force by the spring 64 is constant, the ball 63 is moved to the clutch plate 61 by the contact area and surface roughness of the surface contact. As a result, there is a large variation in the torque required when climbing onto the vehicle, and even if there are some problems that the predetermined tightening torque cannot be obtained, it is used as the clutch means of the present invention. It is those that do not may be. The clutch means 7 may be one that presses the flat surface of the front surface of the ratchet drum 5B or the flat surface of the rear surface of the ratchet drum 5B, instead of the circumferential drum of the ratchet drum 5B. An intervening material may be used.

The pressing pieces of the holding bolts 12LP and 12SP shown in FIG. 20 are composed of any one of copper alloys such as carbide, hard steel, phosphor bronze and the like. In this way, even if the ring 5B of the ratchet drum 5 is pressed with a pressing piece, the ring 5B of the ratchet drum 5 can be hard and not damaged.
The tip spheres of the holding bolts 12LT and 12ST and 12LH and 12SH shown in FIGS. 21 and 22 are made of a hard material that is hard to wear, such as hard steel or super hard metal. In this way, the spherical body can be prevented from being scratched, and the ring 5B of the ratchet drum 5A is not scratched by making the ratchet drum 5B a point or surface contact close to a line contact. The variation in the clutch control force of the ratchet drum 5A due to the holding bolt 12 can be reduced.

The rotating part 6 may be composed of a square pole, a bit, a hexagonal hole, a hexagonal wrench, or the like, and may be freely replaceable. The ratchet drum 5 can be replaced if worn. M is a torque meter.

As shown in FIG. 2, a weak torque can be set by using a presser bolt 12S having a small diameter, and a strong torque can be set by using a presser bolt 12L having a large diameter.

The mounting portion 8 is inserted into a circular recess 15 formed at a position where the center line S of the drive unit 2K is concentric, and is inserted into a screw hole 16 drilled toward the center line S of the drive unit 2K. It is attached in a state in which rotation is prevented by a screwed holding bolt 17.
The mounting portion 8 can be appropriately replaced if worn or damaged.

Next, a method for using the tool holder 1 will be described.
As shown in FIG. 1 and FIGS. 24 to 36, torque that the clutch means 7 of the screw tightening torque adjusting device 1 slides against the screw tightening tool K provided with a meter M, a memory, and a gauge. Is preset to a predetermined torque by adjusting the tightening of the holding bolt 12 of the clutch means 7.
Thereafter, the rotating portion 6 of the tightening tool K is mounted on the mounting portion 8 of the driving unit 2K. Next, when the connecting portion 10 of the ratchet drum 5 is inserted into the socket 9 and a screw is tightened with a tightening tool K or cutting is performed with a cutting tool, and a predetermined torque is reached, the tip of the clutch means 7 reaches the drum 5B. Slip the girth and work is complete.

The details will be described below in each case.
With reference to FIG. 1, the usage method 1 which tightens the hexagon bolt N using the tool holder 1 is demonstrated. A method 1 of using a tightening tool K capable of confirming the torque with a dial M or a scale M such as a plate will be described.
A tightening tool K is attached to the rotating unit 6.
Next, a predetermined torque at which the clutch means 7 slides with respect to the ratchet drum 5A is tightened with the holding bolt 12, and is confirmed with the scale M of the tightening tool K and preset.
Thereafter, the socket 9A is attached to the connecting portion 10, and the hexagon bolt N is inserted into the socket 9A.
Next, when the ratchet function of the tightening tool K is utilized, a predetermined torque is reached, and the pressing piece of the holding bolt 12 slides around the circumference of the ratchet drum 5B, and the hexagon bolt N is tightened with the predetermined torque. Work is completed easily.

Further, with reference to FIG. 24, a method 2 of use for tightening the hexagon socket head bolt A using the tool holder 1 will be described.
After the torque is preset with the scale M of the tightening tool K, the socket 9B is attached to the connecting part 10, and the hexagon wrench R is inserted into the socket 9B and fixed with screws. Insert the tip of the hexagon wrench R.
Next, when the tightening tool K is rotated using the ratchet function, a predetermined torque is reached, and the pressing piece of the holding bolt 12 slides on the circumference of the ratchet drum 5B. The tightening work is easily completed.

In addition, with reference to FIG. 25, a description will be given of a usage method 3 for tightening the cross-recessed machine screw B using the tool holder 1.
After the torque is preset with the scale M of the tightening tool K, the socket 9C is attached to the connecting portion 10, and a commercial bit C is inserted into the socket 9C and fixed with a screw. Insert the tip of a commercial bit C.
Next, when the ratchet function is rotated with the tightening tool K, a predetermined torque is reached, and the pressing piece of the holding bolt 12 slides on the circumferential drum 5A and the cross-recessed machine screw B with the predetermined torque. The tightening work is easily completed.

With reference to FIG. 26, a method 4 of using a variable torque, idling, and latitudinal driver for tightening the cross-recessed machine screw B shown in FIG. 25 using the tool holder 1 will be described.
After the torque is preset with the scale M of the tightening tool K, the tightening tool K is removed, and the handle U is attached to the rotating unit 6.
Next, the socket 9D is attached to the connecting portion 10, the commercial bit C is inserted into the socket 9D and fixed with screws, and then the tip of the commercial bit C is inserted into the cross hole of the cross-recessed machine screw B. When the grip handle U is rotated using the ratchet function, a predetermined torque is reached, and the pressing piece of the holding bolt 12 slides on the circumference of the ratchet drum 5B. The tightening operation is completed easily.
In this case, there is an effect that the variation in screw tightening accuracy is reduced by turning the grip handle U while pushing.
Further, the handle UH is inserted into the grip handle U and is rotated while being pushed. Also,
The handle 2H may be attached to both hands on the base 2A and rotated while being pushed.

With reference to FIG.27 and FIG.28, the usage method 5 which tightens the hexagon socket head cap screw C using the base 2A is demonstrated.
After the torque is preset with the scale M of the tightening tool K, the tightening tool K is removed, and the work is performed by removing the screw 2N that fixes the base 2A and the drive unit 2B.
The two pins 2P attached to the base 2A may be attached to a vise or the like, and the tightening tool K may be attached to the connecting portion 10 to preset the torque with the scale M.
Next, the handle 2H is attached to the screw portions V provided at two locations on the base 2A so that the handle 2H can be gripped with both hands, and the socket 9E is attached to the connecting portion 10. After that, insert the hexagon wrench R into the socket 9E and fix it with screws, insert the tip of the hex wrench R into the hexagon socket of the hexagon socket head cap bolt C, and grasp the handle 2H with both hands to utilize the ratchet function. When it is turned, a predetermined torque is reached, and the pressing piece of the holding bolt 12 slides on the circumferential drum of the ratchet drum 5B, and the tightening operation of the hexagon socket head bolt C is easily completed with the predetermined torque.
Further, turning the handle 2H with both hands also has an effect of reducing variations in screw tightening accuracy.

In addition, with reference to FIG. 29, a method 6 of use for tightening the cross-recessed machine screw D using the base 2A is described.
After the torque is preset with the scale M of the tightening tool K, the handle 2H is attached to two places on the base 2A, and the handle 2H is gripped with both hands for use. The socket 9F is attached to the connecting portion 10, the commercial bit C is inserted into the socket 9F and fixed with screws, and the tip of the commercial bit C is inserted into the cross hole of the cross-recessed machine screw D.
Next, when the handle 2H is grasped with both hands and rotated using the ratchet function, a predetermined torque is reached, and the pressing piece of the holding bolt 12 slides on the circumferential drum of the ratchet drum 5B, so that the predetermined torque can be easily used. The tightening operation of the cross-recessed machine screw D is easily completed.

Moreover, with reference to FIG. 30, the usage method 7 which tightens the hexagon bolt N is demonstrated.
After presetting the torque with the scale M of the tightening tool K, the handle 2H is attached to two places of the base 2A, and the handle 2H is gripped with both hands and used.
Next, the joint T is attached to the connecting portion 10, the socket 9G is attached to the joint T, and the hexagon bolt N is inserted into the tip of the socket 9G.
Next, when the handle 2H is gripped with both hands and rotated using the ratchet function, a predetermined torque is reached, and the pressing piece of the holding bolt 12 slides on the circumferential drum of the ratchet drum 5B. N tightening work is easily completed.

Moreover, with reference to FIG. 31, the tapping usage method 8 by hand tap TA is demonstrated.
After presetting the torque with the scale M of the tightening tool K, the handle 2H is attached to two places of the base 2A, and the handle 2H is gripped with both hands and used.
Next, the socket 9H is attached to the connecting portion 10, the commercially available tap holder TH is attached to the socket 9H, and the hand tap TA is attached to the tip of the tap holder TH.
Next, when tapping the through hole, the tip of the hand tap TA is brought into contact with the prepared hole of the workpiece, and the handle 2H is gripped with both hands and rotated using the ratchet function. End. Next, when the switching lever 5E of the ratchet drum 5A is switched to the reverse rotation and the handle 2H is rotated in the reverse rotation direction, the hand tap TA returns to the original, and the tapping operation is easily completed.
When tapping the bag hole, when tapping is performed and the tip of the hand tap TA reaches the deepest part of the lower hole of the workpiece, an overload occurs and the circumferential drum of the latitud drum 5B slides inside the base 2 It is possible to prevent the hand tap TA from being broken by idling. Next, when the switching lever 5E is switched to the reverse rotation and the two-hand handle H is rotated in the reverse rotation direction, the hand tap TA is returned to the original, and the tapping operation can be easily completed.
Further, by turning the handle with both hands, there is an effect that the hand tap TA is not easily broken during tapping.

With reference to FIG. 32, the method 9 of using the processing of the hand reamer HR will be described.
After presetting the torque with the scale M of the tightening tool K, the handle 2H is attached to two places of the base 2A, and the handle 2H is gripped with both hands and used.
Next, a socket 9I is attached to the connecting portion 10, a bit type commercial product, a drill chuck DC, is inserted into the socket 9I and fixed with a screw, and the hand reamer HR is chucked on the chuck of the drill chuck DC. The edge of the hand reamer HR is brought into contact with the prepared hole of the workpiece.
Next, when the handle 2H is gripped with both hands and rotated using the ratchet function, the reaming work can be performed with the hand reamer HR. Next, when the switching lever 5E of the ratchet drum 5A is switched to the reverse rotation and the handle 2H is rotated in the reverse rotation direction, the hand reamer HR returns to its original state, and the reamer processing operation can be easily completed.
However, during processing with the hand reamer HR, when an overload occurs due to wear or the like of the hand reamer HR, damage to the hand reamer HR can be prevented by the slippery rotation of the circumferential drum of the ratchet drum 5B inside the base 2. . Next, when the switching lever 5E of the ratchet drum 5A is switched to the reverse rotation and the handle 2H is rotated in the reverse rotation direction, the hand reamer HR returns to the original state, the hand reamer HR can be replaced, and the reamer processing operation can be performed again. .
Further, by turning the handle with both hands, there is an effect that the hand tap TA is hardly damaged during tapping.

Referring to FIG. 33, a method 10 for using a hexagonal bolt threaded by a die DS will be described.
After presetting the torque with the scale M of the tightening tool K, the handle 2H is attached to two places of the base 2A, and the handle 2H is gripped with both hands and used.
Next, the socket portion 9J of the die holder DE is mounted on the connecting portion 10, and the die DS is inserted into the tip portion of the die holder DE and screwed.
Next, when the blade edge of the die DS is brought into contact with the workpiece, the handle 2H is grasped with both hands and the ratchet function is used to rotate the thread, the thread cutting with the die DS can be performed, and the blade edge and tip of the die DS are hexagon bolts. When the head of the die DS reaches the head of the die DS, the peripheral drum of the ratchet drum 5B slides and slips inside the base 2 so that the blade of the die DS can be prevented from being damaged.
Next, when the switching lever 5E of the ratchet drum 5A is switched to the reverse rotation and the handle 2H is rotated in the reverse rotation direction, the die DS returns to its original state, and the threading work by the die DS can be easily completed.
In addition, the dice DS is less likely to be damaged by turning with both hands.

It is a side view of the fastening tool which uses the torque wrench equipped with the tool holder of the present invention as an example, and shows a usage example 1. The top view of one Example of the tool holder of this invention. The front view which cut AA in FIG. The bottom view of one Example of the tool holder of this invention. The front view which cut BB in FIG. The top view of one Example of the base of this invention. The front view which cut AA in FIG. The front view which cut BB in FIG. The bottom view of one Example of the base of this invention. Sectional drawing which cut CC in FIG. The top view of one Example of the drive part of this invention. FIG. 12 is a cross-sectional view taken along line AA in FIG. 11. Sectional drawing which cut BB in FIG. The front view which carried out the cross section of one Example of the ratchet drum of this invention. The top view of one Example of the ratchet drum of this invention. The bottom view of one Example of the ratchet drum of this invention. The front view and top view of one Example of the bearing of this invention. The front view and top view of the Example of the thrust metal of this invention. The side view of the handle | steering_wheel used for this invention. Sectional drawing and bottom view of a holding bolt used for the present invention. Sectional drawing and bottom view of a holding bolt used for the present invention. Sectional drawing and bottom view of a holding bolt used for the present invention. The front view and sectional drawing of the Example which integrated the base and drive part of this invention. The side view which shows the usage example 2 of the tool holder of this invention. The side view which shows the usage example 3 of the tool holder of this invention. The front view which shows the usage example 4 of the tool holder of this invention, and the sectional side view. The front view and top view which show the usage example only by the base of the tool holder of this invention. The front view which shows the usage example 5 of the tool holder of this invention. The front view and top view which show the usage example 6 of the tool holder of this invention. The front view which shows the usage example 7 of the tool holder of this invention. The front view which shows the usage example 8 of the tool holder of this invention. The front view which shows the usage example 9 of the tool holder of this invention. The front view which shows the usage example 10 of the tool holder of this invention.

DESCRIPTION OF SYMBOLS 1 Tool holder 2 Base 3 Recess 4 Bearing 5 Lattiet drum 6 Rotating part 7 Clutch means 8 Mounting part 9 Socket 10 Connecting part 11 Screw hole 12 Holding bolt

Claims (4)

A base, a circular recess formed at a position where the center line of the base is concentric, a ratchet drum rotatably inserted into the recess, and provided with ratchet means; and pressing the ratchet drum Clutch means for preventing relative rotation of the ratchet drum with respect to the base until a predetermined rotational force is applied to the ratchet drum from the rotating portion of the screw tightening tool, and a position where the center line of the base is concentric A tool holder comprising: a mounting portion formed and detachably mounted on a rotating portion of a screw tightening tool; and a connecting portion detachably mounted on a socket detachably mounted on a screw. .
The clutch means comprises a holding bolt screwed into a screw hole drilled in the base, and the tip of the holding bolt presses the peripheral drum of the ratchet drum, and the tip of the holding bolt is the ratchet. 2. The tool holder according to claim 1, wherein the clutch means is operated by tightening a screw with a screw tightening tool or a two-hand handle until the drum body slides. The tool holder according to any one of claims 1 and 2, wherein the clutch means is provided to face each other at a position separated by 180 degrees. The clutch means is provided with a pressing bolt screwed into a screw hole drilled toward the center line of the base, and a pressing piece provided with a spring at the tip of the pressing bolt. The tool holder according to any one of claims 1 to 3, wherein a pressing piece is pressed against the tool holder.