JP2020116663A - Tool set and screw attaching/detaching method - Google Patents

Abstract

To improve efficiency for screw driving work for a screw in a narrow place.SOLUTION: A tool set 10 includes three screw-driving tools 11, 12, 13 of which blade edges 112, 122, 132 are provided while being inclined or at right angle to shaft parts 111, 121, 131. In the three screw-driving tools, the blade edges are mutually offset by 30 degrees around a center line Cb of the blade edge.SELECTED DRAWING: Figure 1

Description

The present invention relates to a tool set and a screw attaching/detaching method.

As a tool for attaching and detaching screw members, etc., a detachable tool such as a screw member in which a straight rod-shaped portion such as a Phillips screwdriver, a flathead screwdriver, or a box wrench is provided with a hole for torque addition that penetrates in the diameter direction is known. (For example, refer to Patent Document 1).

Utility model registration No. 3089536

By the way, in the field of industrial robots, a multi-joint robot arm mechanism having a plurality of joints has become mainstream. The articulated robot arm mechanism is composed of many parts, and screws are used to fasten the parts. A screw may loosen due to various reasons such as aging, vibration of an object to be fastened, and load on a fastener. For this reason, it is necessary to regularly perform maintenance to tighten the screws.

However, in a robot arm mechanism that is composed of many parts and many cables are routed, there are cases where the screw to be worked is intricately complicated and is in a deep position, and it is not possible to insert the driver. there were. Since the worker had to remove the parts and the cover around the screw in order to turn the screw, it took time for maintenance. Therefore, there is a demand for a tool that can efficiently perform a screwdriver work for a screw in a narrow space.

One aspect of the present disclosure has n screwdrivers in which a cutting edge portion is provided at a right angle or an inclination with respect to a shaft portion. The blade tips of the n screwdrivers are displaced from each other by 90/n degrees or 180/n degrees around the center line of the blade tips.

According to one aspect, it is possible to improve the efficiency of screwing work of a screw in a narrow space.

FIG. 1 is a side view showing a tool set according to the first embodiment. FIG. 2 is a front view of the tool set of FIG. FIG. 3 is an enlarged view of a cutting edge portion of the screwdriver tool of FIG. 2. FIG. 4 is a diagram showing a usage state of the tool set according to the first embodiment. FIG. 5 is a sectional view taken along the line AA′ of FIG. FIG. 6 is a supplementary explanatory view for explaining a method of using the tool set of FIG. FIG. 7: is a figure which shows the cutting edge part of the screwdriver tool of the tool set which concerns on the modification of 1st Embodiment. FIG. 8: is a figure which shows the edge part of the screwdriver tool of the tool set which concerns on the other modification of 1st Embodiment. FIG. 9 is a side view showing the tool set according to the second embodiment. FIG. 10 is an enlarged front view showing a cutting edge portion of the screwdriver tool of FIG. 9. FIG. 11 is an enlarged front view showing a cutting edge portion of a screwdriver tool of a tool set according to a modification of the second embodiment. FIG. 12 is a side view showing a tool set according to the third embodiment. FIG. 13 is an enlarged front view showing the hexagonal block of the hexagonal wrench of FIG. FIG. 14 is a front enlarged view showing a hexagonal block of a screwdriver tool of a tool set according to a modification of the third embodiment.

Hereinafter, the tool set according to the present embodiment will be described with reference to the drawings. In the following description, components having substantially the same functions and configurations are designated by the same reference numerals, and duplicate description will be given only when necessary.

(First embodiment)
The tool set according to the first embodiment will be described with reference to FIGS. 1 to 3.
As shown in FIGS. 1 and 2, the tool set 10 according to the first embodiment has three screwdriver tools 11, 12, and 13. The first screwdriver tool 11 will be described below. The second screwdriver tool 12 and the third screwdriver tool 13 are different from the first screwdriver tool 11 only in the cutting edge portion described later, and the basic configuration is the same as that of the first screwdriver tool 11. .. Therefore, the description of the second screw driving tool 12 and the third screw driving tool 13 is omitted.

The first screwdriver 11 is a Phillips screwdriver for loosening or tightening a screw having a cross groove. Specifically, the first screwdriver tool 11 has a linear shaft portion 111. At the rear end of the shaft portion 111, a grip portion 113 for an operator to hold by hand is provided. A cutting edge 112 is attached to the tip of the shaft 111. The center line Cb of the cutting edge portion 112 is orthogonal to the center line Cs of the shaft portion 111 so as to loosen the screw fixed to the screw hole from the direction orthogonal to the screw hole or tighten the screw in the screw hole. The shaft 111 is attached in a right-angled direction. As a result, the operator does not rotate the shaft portion 111 around the center line Cs by gripping the grip portion 113, but grips the grip portion 113 with the position of the cutting edge portion 112 fixed and holds the shaft portion 111. By rotating the screw, the screw fitted in the cutting edge 112 can be turned. The blade tip 112 has four blades assembled in a cross shape so as to fit in the cross groove of the screw. The cross-shaped cutting edge portion 112 is so-called 90-degree symmetry, in which the shapes of the cutting edge portions before and after the rotation overlap each other when rotated 90 degrees around the center line Cb.

The three screwdriver tools 11, 12, 13 have blade edge portions 112, 122, 132 offset from each other by 30 degrees around the center line Cb. That is, the blade tip portion 122 of the second screwdriver tool 12 is deviated from the first screwdriver tool 11 by 30 degrees around the center line Cb. The third screwdriver tool 13 has a cutting edge portion 132 deviated from the first screwdriver tool 11 by 60 degrees around the center line Cb. The angle of 30 degrees at which the blade tips 112, 122, 132 of the three screwdrivers 11, 12, 13 are displaced from each other is 90 degrees because the blade tips are 90 degrees symmetrical, so 90 degrees is divided by the number of screwdrivers 3. It is an angle. Typically, as shown in FIG. 3, in a front view, the first screwdriver tool 11 is configured such that the blade tip portion 112 has a blade parallel to the center line Cs of the shaft portion 111. Specifically, the blade tip portion 112 of the first screwdriver tool 11 is configured such that two blades of the four blades which are parallel to each other are parallel to the center line Cs of the shaft portion 111. Accordingly, when using the first screwdriver tool 11, the operator can determine the orientation of the blade tip portion 112 only by the orientation of the shaft portion 111 without checking the blade tip portion 112. In addition, since the orientation of the blade tip portion 112 of the first screwdriver tool 11 can be recognized only by the orientation of the shaft portion 111, the operator can also determine the orientation of the blade tip portions 122 and 132 of the other screwdriver tools 12 and 13. , Which can be estimated from the directions of the shaft portions 121 and 131, and the screwdriver to be used can be easily selected.

The tool set 10 according to the first embodiment is used in a specific work environment where the screw holes cannot be accessed by the conventional screwdriver, and exerts its effect. This specific working environment is an environment in which the tool can be inserted only from the direction orthogonal to the center line of the screw hole 93. Such an environment occurs during maintenance of the robot arm mechanism, for example. Maintenance involves tightening loose screws. As shown in FIGS. 4 and 5, when tightening the screw 90 for fixing another link 83 to the link 81 of the robot arm mechanism, the cover 85 covering the robot arm mechanism is not removed but provided for maintenance. It may be necessary to insert a tool through the small window 87 and tighten the screw 90 from a direction orthogonal to the center line of the screw hole 93. In the screwdriver tools 11, 12, and 13 of the tool set 10 according to the first embodiment, since the blade tip 112 is attached at a right angle to the shaft 111, even in the environment as described above, the small window It is possible to insert the screwdriver tools 11, 12, and 13 from 87 and fit the cutting edge portion thereof into the groove 91 of the screw 90. Since the length of the cutting edge portion 112 is short as in the first embodiment, a tool can be inserted into the screw hole 93 not only by the small window 87 as shown in FIG. 4 but also by an internal structure such as the link 81. Even when the height is limited, the blade tip can reach the screw hole 93. An environment in which the tool can be inserted only from a direction inclined to the center line of the screw hole 93 such as 45 degrees instead of the direction orthogonal to the center line of the screw hole 93 is assumed. In the first embodiment, the blade tip portion is attached at a right angle to the shaft portion, but the blade tip portion may be inclined with respect to the shaft portion depending on the working environment.

Further, the opening of the small window 87 is small so as not to spoil the appearance of the robot arm mechanism. As shown in FIG. 5, the opening angle in the width direction of the small window 87 around the screw hole 93, that is, the angle at which the tool can be substantially rotated is, for example, about 30 degrees. On the other hand, since the cross groove 91 of the screw 90 is 90-degree symmetrical, even if the screwdriver 11 can be inserted through the small window 87 and the cutting edge portion 112 can be fitted into the cross groove 91 of the screw 90, a maximum of 30 The screw 90 can be rotated only once. Further, since the blade tip 112 of the screwdriver tool 11 is symmetrical with 90 degrees, and the shaft 111 of the screwdriver tool 11 can swivel at an angle of 30 degrees, the blade tip 112 can only be rotated by 30 degrees. .. Therefore, it is possible that the cutting edge 112 cannot be fitted into the cross groove 91 of the screw 90. The tool set 10 according to the first embodiment includes a plurality of screwdriver tools 11, 12, 13. The screwdriver tools 11, 12, 13 have blade edge portions 112, 122, 132 offset from each other by 30 degrees. Therefore, irrespective of the direction of the cross groove 91 of the screw 90, one of the blade tips of the screwdriver tools 11, 12, 13 can be fitted into the cross groove 91 and the screw 90 can be rotated.

The screwdriver work using the tool set 10 according to the first embodiment is performed in the following procedure. The screwdriver is such that the blade tip portion can be fitted in the screw groove 91 of the screw 90 in a state where the screw 90 is inserted in a narrow place where the screw 90 is present, and the shaft portion can be rotated at the widest angle around the blade tip portion. A tool (screwdriver 11 in the example of FIG. 6) is selected. The screw 90 is turned using the selected screwdriver 11. The screwdriver 11 is removed, and the screwdrivers 12 and 13 excluding the already selected screwdriver 11 are also inserted into a narrow space, and the screw 90 rotated by the screwdriver 11 is removed. The next screwdriver (screwdriver 12 in the example of FIG. 6) is selected, in which the blade tip can be fitted in the thread groove 91 and the shaft can be rotated at the widest angle around the blade tip. Using the next selected screwdriver tool 12, further turn the turned screw. Similarly, the screwdriver 13 is used, and the screwdrivers 11 and 12 are sequentially used to tighten the screw 90 little by little.

As shown in FIG. 6, the first screwdriver tool 11 is inserted through the small window 87, and the cutting edge portion 112 is fitted into the cross groove 91 of the screw 90 (step S1). With the opening width of the small window 87, the rotatable angle of rotation of the tool is approximately 30 degrees, so the first screwdriver tool 11 is rotated (tilted) about 30 degrees around the cutting edge portion 112, and the screw 90 is rotated. Is turned (step S2). After that, the cutting edge portion 112 is removed from the cross groove 91 of the screw 90, and the first screwdriver tool 11 is pulled out from the small window 87.

Next, the second screwdriver 12 is inserted into the small window 87, and the blade tip 122 is fitted into the cross groove 91 of the screw 90 (step S3). The second screwdriver 12 is rotated about the blade tip 122 by about 30 degrees, and the screw 90 is rotated (step S4). After that, the blade tip 122 is removed from the cross groove 91 of the screw 90, and the second screwdriver tool 12 is pulled out from the small window 87.

Further, the third screwdriver 13 is inserted into the small window 87, and the blade tip portion 132 is fitted into the cross groove 91 of the screw 90 (step S5). The third screw driver 13 is rotated about the blade edge portion 132 by about 30 degrees, and the screw 90 is rotated (step S6). After that, the blade tip portion 132 is removed from the cross groove 91 of the screw 90, and the third screwdriver tool 13 is pulled out from the small window 87. As a result, the screw 90 is rotated 90 degrees. Therefore, after that, when the screw 90 is further turned, the process returns to step S1 and the screw 90 is turned by the first screw turning tool 11. The above steps S1 to S6 are repeatedly executed until the screw 90 is firmly fixed to the screw hole 93. In FIG. 6, the first screwdriver tool 11 is used first, but the first tool to be used is the second screwdriver tool 12 or the third screwdriver depending on the orientation of the cross groove 91 of the screw 90. It may be the turning tool 13. Due to the above-mentioned screwdriver work, the tool can be inserted only from the direction orthogonal to the screw hole 93, and the angle at which the inserted tool can be rotated is limited to 30 degrees. Even if there is, by using the tool set 10 according to the first embodiment, by gradually turning the screw 90 while exchanging the screwdriver, the screw 90 is fixed to the screw hole 93 or fixed to the screw hole 93. The operation of loosening the screw 90 can be performed. The tool set 10 according to the first embodiment can be preferably used when the rotatable angle is more than 30 degrees.

The angle at which the blade tips of the screwdriver tools are displaced from each other is not limited to 30 degrees. For example, as shown in FIG. 7, in the case of a tool set 20 including five screwdriver tools 21, 22, 23, 24, 25, the five screwdriver tools 21, 22, 23, 24, 25 are mutually The cutting edge portions 212, 222, 232, 242, 252 can be configured to be offset by 18 degrees around the center line Cb. Here, description of the shaft portions 211, 221, 231, 241, 251 of the five screwdriver tools 21, 22, 23, 24, 25 will be omitted. An angle of 18 degrees at which the cutting edge portions 212, 222, 232, 242, 252 are displaced from each other is an angle obtained by dividing 90 degrees by the number of screwdrivers 5 because the cutting edge portions are 90 degrees symmetrical. The tool set 20 described above can be suitably used in a work environment in which the rotatable angle is more than 18 degrees even if the rotatable angle of the screwdriver is less than 30 degrees.

As described above, the misalignment angle between the blade edges may be determined according to the number of screwdriver tools. When the tool set comprises n screwdrivers having cross-shaped blade tips, the n screwdrivers are configured such that the blade tips are offset from each other by 90/n degrees about the center line Cb.

Further, the tool set 10 shown in FIGS. 1 to 3 and the tool set 20 shown in FIG. 7 are examples in which the blade tips are evenly displaced from each other by an angle obtained by dividing 90 degrees by the number of tools for screw turning. However, for example, as shown in FIG. 8, the first screwdriver 11, the second screwdriver 12, the third screwdriver 13, and the fourth screwdriver of the tool set 10 shown in FIGS. It is possible to configure a new tool set 30 in which 14 and the fifth screwdriver tool 15 are added. Since the basic structure of the fourth and fifth screwdriver tools 14, 15 is the same as that of the first, second, and third screwdriver tools 11, 12, 13, the description of the shaft portions 141, 151 will be omitted. The fourth screw turning tool 14 is a tool in which the blade edge portion 142 is displaced from the first screw turning tool 11 by 10 degrees around the center line Cb. The fifth screw turning tool 15 is a tool in which the cutting edge portion 152 is displaced from the first screw turning tool 11 by 15 degrees around the center line Cb.

In the screwdriver operation as shown in FIG. 6, a screwdriver tool that first fits in the cross groove of the screw may not always be able to rotate the screw 30 degrees, and may be able to rotate it only 10 degrees, for example. Absent. However, as described above, with respect to the first, second, and third screwdriver tools 11, 12, and 13, the fourth screwdriver tool 14 and the fifth screwdriver having the cutting edge portions with different angles around the center line Cb. By further including the tool 15, the tool set 10 may initially rotate the screw at an angle of 10 degrees, whereas the tool set 30 may allow the screw to be rotated by 30 degrees. Thereby, the working time of the worker can be shortened. In addition, after the 4th screwdriver tool 14 or the 5th screwdriver tool 15 is first used, if screwdriver operation is performed, exchanging the 1st, 2nd, 3rd screwdriver tools 11, 12, and 13. Good. In this way, by adding another screw-driving tool to a tool set including a plurality of screw-driving tools whose blade edges are evenly displaced from each other, it is possible to easily select the first screw-driving tool.

Of course, in the above, the tool set 30 has a configuration in which two screw-driving tools are added to the three screw-driving tools 11, 12, and 13 of the tool set 10, but the number of screw-driving tools to be added is two. Not limited to. Further, the angle of deviation of the blade tip of the additional screw turning tool with respect to the first screw turning tool 11 around the center line Cb of the blade tip is not limited to 10 degrees or 15 degrees. The screwdriver to be added only needs to have a blade edge offset by less than 30 degrees around the center line Cb with respect to one of the three screwdrivers 11, 12, and 13.

(Second embodiment)
The screwdriver tool of the tool set according to the first embodiment has a cross-shaped blade edge portion. However, the shape of the cutting edge is not limited to this. Hereinafter, the tool set according to the second embodiment will be described with reference to FIGS. 9 to 11. In addition, the screwdriver tool that constitutes the tool set according to the second embodiment is different from the screwdriver tool that constitutes the tool set according to the first embodiment only in the shape of the blade tip portion, and other structures are It is the same. Therefore, in the second embodiment, the description of the parts other than the cutting edge part (the shaft parts 411, 421, 431 and the grip parts 413, 423, 433) is omitted. The screwdriver that constitutes the tool set according to the second embodiment is a flat-blade screwdriver for loosening or tightening a screw having a single-character groove.

As shown in FIGS. 9 and 10, the tool set 40 according to the second embodiment has three screwdriver tools 41, 42, 43. Hereinafter, the blade tips of the screwdriver tools 41, 42, 43 have the same shape. Here, the 1st screwdriver tool 41 is demonstrated.

The cutting edge portion 412 of the first screwdriver 41 has a single letter shape. Specifically, the blade tip portion 412 is configured with a single blade. Such a one-letter shaped cutting edge portion 412 is so-called 180-degree symmetry (line symmetry) in which the shapes of the cutting edge portion 412 before and after the rotation overlap when the cutting edge portion 412 is rotated 180 degrees around the center line Cb.

In the three screwdriver tools 41, 42, 43, the cutting edge portions 412, 422, 432 are deviated from each other by 60 degrees around the center line Cb. This 60 degrees is an angle obtained by dividing 180 degrees by the number of screw-driving tools 3, because the cutting edge is 180 degrees symmetrical. Typically, as shown in FIG. 10, in a front view, the first screwdriver tool 41 is configured such that one blade of the blade tip portion 412 is parallel to the center line Cs of the shaft portion 411. Accordingly, when using the first screwdriver tool 41, the operator can determine the orientation of the blade tip portion 412 only by the orientation of the shaft portion 411 without checking the blade tip portion 412. Further, since the orientation of the blade tip portion 412 of the first screwdriver tool 41 can be understood only by the orientation of the shaft portion 411, the operator can also determine the orientations of the blade tip portions 422, 432 of the other screwdriver tools 42, 43. , Which can be estimated from the directions of the shaft portions 421 and 431, and the screwdriver to be used can be easily selected. By using the tool set 40 according to the second embodiment, even if the groove of the screw has a single letter shape, the worker can use the tool set 40 to perform the screwdriver work as in the first embodiment. .. The tool set 40 described above can be suitably used in a work environment in which the turning angle of the screwdriver is more than 60 degrees.

As in the first embodiment, the angles at which the blade tips of the screwdriver tools are displaced are not limited to the above. For example, as shown in FIG. 11, in the case of a tool set 50 including five screw turning tools 51, 52, 53, 54, 55, the five screw turning tools 51, 52, 53, 54, 55 are The cutting edge portions 512, 522, 532, 542, 552 can be configured to be offset by 36 degrees around the center line Cb. Here, the description of the shaft portions 511, 521, 531, 541, 551 is omitted. The angle of 36 degrees is an angle obtained by dividing 180 degrees by the number of screw-driving tools, since the cutting edge portion is 180 degrees symmetrical. The tool set 50 described above can be suitably used even in a work environment in which the turning angle of the screwdriver is less than 60 degrees as long as the turning angle exceeds 36 degrees.

As described above, the misalignment angle between the blade edges may be determined according to the number of screwdriver tools. When the tool set includes m screwdrivers having a letter-shaped blade tip, the m screwdrivers are configured such that the blade tips are offset from each other by 180/m degrees around the center line Cb.

Further, the tool set 40 shown in FIGS. 9 and 10 and the tool set 50 shown in FIG. 11 are examples in which the blade tips are evenly offset from each other by an angle obtained by dividing 180 degrees by the number of screwdriver tools. However, similar to the first embodiment, another screwdriver having the same blade edge shape is added to the three screwdrivers 41, 42, 43 shown in FIGS. 9 and 10 to form a new tool set. can do. The screw driving tool added at this time is 60 degrees around the center line Cb, such as 17 degrees, 43 degrees, and 55 degrees, with respect to any one of the three screw driving tools 41, 42, and 43. The cutting edge has an angle offset of less than. As described in the first embodiment, it is easy to select the first screwdriver tool by adding another screwdriver tool to a tool set including a plurality of screwdriver tools whose blade edges are evenly offset from each other. It is possible to shorten the working time.

(Third Embodiment)
In the first and second embodiments, the work target is the screw having the cross groove or the one-character groove, but the work target is not limited to these. Hereinafter, the tool set according to the third embodiment will be described with reference to FIGS. 12 to 14. The plurality of tools constituting the tool set according to the third embodiment are hexagonal wrenches for turning bolts (screws) having regular hexagonal holes. In the hexagon wrench, the blade tip portion of the screwdriver forming the tool set according to the first embodiment is changed to a hexagon block described later, and the other structures are the same. Therefore, in the third embodiment, description of the shaft portions 611, 621, 631 and the grip portions 613, 623, 633 will be omitted.

As shown in FIGS. 12 and 13, the tool set 60 according to the third embodiment has three hexagonal wrenches 61, 62, 63. The first hexagon wrench 61 will be described below. The second hexagonal wrench 62 and the third hexagonal wrench 63 differ from the first hexagonal wrench 61 only in the orientation around the center line Cb of the hexagonal block described later, and the basic configuration is the same as the first hexagonal wrench 61. The same is true. Therefore, the description of the second hexagon wrench 62 and the third hexagon wrench 63 is omitted.

The first hexagon wrench 61 has a block having a regular hexagonal bottom surface (hereinafter referred to as a hexagonal block). The hexagonal block is provided at a right angle to the shaft portion 611. The hexagonal block 612 has a so-called 60-degree symmetry, in which the shapes of the hexagonal block 612 before and after the rotation are overlapped when the hexagonal block 612 is rotated about the center line Cb by 60 degrees.

The three hexagonal wrenches 61, 62, 63 have hexagonal blocks 612, 622, 632 offset from each other by 20 degrees around the center line Cb. This 20 degrees is an angle obtained by dividing 60 degrees by three hexagonal wrench because the hexagonal block is symmetrical with 60 degrees. Typically, as shown in FIG. 13, in a front view, the first hexagon wrench 61 is configured such that an arbitrary diagonal line is parallel to the center line Cs of the shaft portion 611. Accordingly, when using the first hexagon wrench 61, the operator can determine the orientation of the hexagon block 612 only by the orientation of the shaft portion 611 without checking the hexagon block 612. Further, since the orientation of the hexagonal block 612 of the first hexagonal wrench 61 can be understood only by the orientation of the shaft portion 611, the operator can also determine the orientation of the hexagonal blocks 622 and 632 of the other hexagonal wrenches 62 and 63. It can be estimated from the directions of the parts 621 and 631, and it becomes easy to select the hexagon wrench to be used. By using the tool set 60 according to the third embodiment, even if the work target is a bolt having a regular hexagonal hole, the worker uses the tool set 60 to rotate the bolt as in the first embodiment. be able to. The tool set 60 described above can be suitably used in a working environment in which the rotatable angle of the hexagon wrench is more than 20 degrees.

Note that, as in the first embodiment, the displacement angles of the hexagonal blocks of the hexagonal wrench are not limited to the above. For example, as shown in FIG. 14, in the case of a tool set 70 including five hexagonal wrenches 71, 72, 73, 74, 75, the five hexagonal wrenches 71, 72, 73, 74, 75 are hexagonal blocks with respect to each other. 712, 722, 732, 742, and 752 can be configured to be offset by 12 degrees around the center line Cb. Here, the description of the shaft portions 711, 721, 731, 741, 751 is omitted. This 12 degrees is an angle obtained by dividing 60 degrees by the number of hexagonal wrench 5 because the hexagonal block is symmetrical with 60 degrees. The tool set 70 can be preferably used even in a working environment in which the rotatable angle of the hexagon wrench is less than 20 degrees as long as the rotatable angle exceeds 12 degrees.

As described above, the deviation angle between the hexagonal blocks may be determined according to the number of hexagonal wrenches. When the tool set is provided with k hexagonal wrenches having a one-letter cutting edge, the k hexagonal wrenches are configured such that the hexagonal blocks are offset from each other by 60/k degrees about the centerline Cb.

The tool set 60 shown in FIGS. 12 and 13 and the tool set 70 shown in FIG. 14 are examples in which the hexagonal blocks are evenly displaced from each other by an angle obtained by dividing 60 degrees by the number of hexagonal wrenches. However, similar to the first embodiment, another hexagon wrench having a similar tip shape is added to the three hexagon wrenches 61, 62, 63 shown in FIGS. 12 and 13 to form a new tool set. You can The hexagon wrench added at this time is an angle of less than 20 degrees such as 5 degrees, 14 degrees, and 17 degrees around the center line Cb with respect to one of the three hexagon wrenches 61, 62, 63. It has an offset hexagonal block. As described in the first embodiment, it is possible to easily select the first hexagonal wrench by adding another hexagonal wrench to the tool set including a plurality of hexagonal wrenches whose hexagonal blocks are evenly displaced from each other. It can be done and work time can be reduced.

The first, second, and third embodiments have been described by taking a plus driver, a minus driver, and a hexagon wrench as examples, but the embodiments are not limited thereto. For example, a hexagon socket for turning a hexagon bolt can be configured similarly to these embodiments. Further, the cutting edge is not limited to the cross shape or the one-letter shape. If the target screw has a special groove such as a radial groove that cannot be turned by a plus driver or a minus driver, the cutting edge portion of the tool may be configured to fit into the special groove. Of course, if the target screw has a special hole that cannot be turned with a hexagon wrench, such as a triangular hole, a square hole, or a star hole, you can configure the tip of the tool so that it fits into the special hole. Good.

Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the invention described in the claims and equivalents thereof as well as included in the scope and the gist of the invention.

10... Tool set, 11... 1st screwdriver tool, 12... 2nd screwdriver tool, 13... 3rd screwdriver tool, 111, 121, 131... Shaft part, 112, 122, 132... Blade edge part, 113, 123 , 133... Grip part.

Claims (9)

In a tool set having n screwdrivers in which a cutting edge is provided at a right angle or at an angle with respect to a shaft,
A tool set in which the blade tips of the n screwdrivers are offset from each other by 90/n degrees or 180/n degrees around the center line of the blade tip. The tool set according to claim 1, wherein the blade tip portion of a specific screwdriver among the n screwdrivers has a blade that is parallel to a center line of the shaft portion in a front view. The tool set according to claim 1, wherein the cutting edge portion has a cross shape. The tool set according to claim 1, wherein the cutting edge portion has a single letter shape. The tool set according to any one of claims 1 to 4, wherein n is 3 or 5. The tool according to claim 3, further comprising another screw-driving tool in which the cutting edge portion is deviated from the center line by an angle of less than 90/n with respect to one of the n screw-driving tools. set. The tool according to claim 4, further comprising another screw-driving tool in which the cutting edge portion is deviated from the center line by an angle of less than 180/n with respect to one of the n screw-driving tools. set. In a tool set having first and second screwdriver tools in which a cutting edge portion is provided at a right angle or an inclination with respect to a shaft portion,
A tool set in which the cutting edge portion of the second screw turning tool is offset from the cutting edge portion of the first screw turning tool by an angle of less than 90 degrees or less than 180 degrees around the center line of the cutting edge portion. It is a method to attach and detach screws existing in narrow spaces,
The tool set according to claim 1, which is inserted into the narrow space, the blade tip portion can be fitted in the thread groove of the screw, and the shaft portion is rotated at the widest angle around the blade tip portion. The process of selecting a screwdriver that can
Rotating the screw using the selected screwdriver,
From the tool set except for the selected screwdriver, insert it in the narrow space, the blade tip can be fitted in the thread groove of the screw that is turned, and the shaft portion is the blade tip. And the step of selecting the next screwdriver that can rotate at the widest angle around
A step of further turning the turned screw using the selected next screw turning tool.