JP7563259B2 - Temporary Fastening Tool - Google Patents

Description

The present invention relates to a temporary fastening tool.

Patent document 1 describes a temporary tightening tool in which at least a portion of the side of the pin protrudes from the inner surface of the socket towards the central axis of the socket, and when the socket rotates with a bolt inserted in it, the protruding portion of the pin abuts against the corner of the bolt, causing the bolt to rotate and screw into the female thread.

JP 2018-051637 A JP 2019-150933 A JP 2008-213071 A JP 2018-012155 A

The temporary tightening tool in Patent Document 1 has difficulty dealing with threaded members with polygonal holes, such as hexagonal socket bolts.

The present invention was made to solve such problems, and provides a temporary tightening tool that can easily temporarily tighten a screw member having a hole or the like formed therein.

The temporary fastening tool according to this embodiment is a temporary fastening tool for temporarily fastening a screw member to a screwed portion of a workpiece, and includes a tool body, a knob installed on the tool body, at least one socket having a rotation axis, being rotatably supported on the tool body, and having a bottom surface that contacts the head of the screw member, a transmission mechanism that transmits a rotational driving force input to the knob to the socket, a socket tip that protrudes from the bottom surface of the socket and is inserted into a hole or groove in the head, and a socket tip that protrudes from the bottom surface of the socket around the socket tip and is inserted into the hole or groove in the head. Or, the socket includes a plurality of pins to be inserted into the grooves, and two magnets arranged on the bottom surface of the socket at positions facing each other across the rotation axis, and the outer diameter of the socket is smaller than the maximum diameter of the screw member. When the socket rotates with the plurality of pins inserted into the hole or groove, at least a portion of each pin is located outside the inscribed circle of the hole or groove centered on the rotation axis, and the side of the pin abuts against the inner surface of the hole or groove, causing the screw member to rotate and screw into the screwed portion. With this configuration, the screw member with a hole or the like formed can be temporarily tightened with good workability.

In the above-mentioned temporary tightening tool, the tip of the pin may be tapered. This configuration makes it easier to insert the pin into a hole in a screw-fitting member, etc.

In the above-mentioned temporary fastening tool, the pins may be arranged at equal intervals along the inscribed circle on the bottom surface when viewed from the direction of the rotation axis, and each magnet may be arranged between the pins on the inscribed circle. With this configuration, when the socket is rotated with the pin inserted in the hole of the screw member, the screw member can be rotated.

In the above-mentioned temporary fastening tool, the magnets may be arranged so that the magnetic poles on the bottom surface of the socket are oriented in different directions. With this configuration, magnetic field lines are not emitted to the outside, so magnetization of adjacent screw members can be suppressed.

In the above-mentioned temporary fastening tool, the socket has a through hole extending in the direction of the rotation axis, and a part of the opening on the bottom side of the through hole is blocked by the tip of the socket, and the magnet is disposed on the bottom side of the through hole and exposed to the opening. This configuration can prevent the magnet from coming off.

This embodiment provides a temporary tightening tool that can easily temporarily tighten a screw member having a hole or the like formed therein.

FIG. 2 is a side view illustrating the temporary fastening tool according to the first embodiment. FIG. 2 is a top view illustrating the temporary fastening tool according to the first embodiment. 4 is a cross-sectional view illustrating a tool body that supports a socket in the temporary fastening tool according to the first embodiment. FIG. FIG. 2 is a perspective view illustrating a socket in the temporary fastening tool according to the first embodiment. 1 is a perspective view illustrating a screw member that is temporarily fastened by the temporary fastening tool according to the first embodiment; FIG. 5A and 5B are diagrams illustrating an example of an operation of inserting a tip portion of a socket into a hole of a screw member in the temporary fastening tool according to the first embodiment. 4 is a diagram illustrating an example of a bottom surface of a socket in the temporary fastening tool according to the first embodiment. FIG. 1 is a perspective view illustrating an automatic supply device that supplies a screw member to the temporary fastening tool according to the first embodiment. FIG. 10A to 10C are diagrams illustrating an example of an operation of a temporary fastening tool supplied with a screw member according to the first embodiment, temporarily fastening the screw member to a screwed portion of a workpiece. 10A to 10C are diagrams illustrating an example of an operation of a temporary fastening tool supplied with a screw member according to the first embodiment, temporarily fastening the screw member to a screwed portion of a workpiece. 5 is a diagram illustrating an example of a relationship between an outer diameter of a socket and a maximum diameter of a screw-fitting member according to the first embodiment. FIG. 5A and 5B are diagrams illustrating an example of an operation of inserting a tip portion of a socket into a hole or a groove of a screw member in the temporary fastening tool according to the first embodiment. 11A to 11C are diagrams illustrating an example of an operation of inserting a tip portion of a socket into a hole of a screw member in a temporary fastening tool according to a comparative example. 4 is a diagram illustrating an example of the relationship between the outer diameter of a tip portion of a socket and an inscribed circle of a hole or a groove of a screw-on member in the temporary fastening tool according to the first embodiment. FIG. 5A to 5D are diagrams illustrating an example of an operation of inserting a tip portion of a socket into a hole or a groove of a screw member in the temporary fastening tool according to the first embodiment. 1A and 1B are diagrams illustrating mounting holes of a socket to which a magnet is attached in a temporary fastening tool of embodiment 1, where (a) shows the bottom surface of the socket, (b) shows a cross-section of the socket, and (c) shows the top surface of the socket. 4A to 4C are diagrams illustrating examples of magnet materials and magnetic poles in the temporary fastening tool according to the first embodiment. 5A to 5D are diagrams illustrating an example of an operation of magnetizing a screw member in a socket in the temporary fastening tool according to the first embodiment. 1A and 1B are diagrams illustrating a socket in which pins are arranged in a temporary fastening tool according to embodiment 1, in which (a) shows the bottom surface of the socket, (b) shows a cross-section of the socket, and (c) shows the bottom surface of the socket omitting the tip of the socket. 5A and 5B are diagrams illustrating an example of an operation of abutting a pin against an inner surface of a hole or groove of a screw member and rotating the pin in the temporary fastening tool according to the first embodiment. 5A to 5C are diagrams illustrating an example of a relationship between a pin and a hole or a groove of a screw-on member in the temporary fastening tool according to the first embodiment. 5A to 5D are perspective views illustrating an example of an operation of inserting a pin into a hole of a screw-on member in the temporary fastening tool according to the first embodiment. 5A to 5D are plan views illustrating an example of an operation of inserting a pin into a hole of a threaded member in the temporary fastening tool according to the first embodiment. 5A to 5D are cross-sectional views illustrating an example of an operation of inserting a pin into a hole of a threaded member in the temporary fastening tool according to the first embodiment. 5A and 5B are diagrams illustrating properties of a magnet in the temporary fastening tool according to the first embodiment. 13 is a diagram illustrating an example of a bottom surface of a socket in the temporary fastening tool according to the second embodiment. FIG. 13A and 13B are diagrams illustrating an example of an operation of abutting a pin against an inner surface of a hole or groove of a screw member and rotating the pin in a temporary fastening tool according to a second embodiment. 13 is a diagram illustrating a bottom surface of a socket in a temporary fastening tool according to another example of the second embodiment. FIG. 13A to 13C are diagrams illustrating an example of an operation of abutting a pin against an inner surface of a hole or groove of a screw member and rotating the pin in a temporary fastening tool according to another example of the second embodiment. 13A to 13C are diagrams illustrating an example of an operation of a temporary fastening tool according to a second embodiment, in which a pin is brought into contact with an inner surface of a hole or groove of a threaded member and rotated.

The present invention will be described below through embodiments of the invention, but the invention according to the claims is not limited to the following embodiments. Furthermore, not all of the configurations described in the embodiments are necessarily essential as means for solving the problems. For clarity of explanation, the following description and drawings have been omitted and simplified as appropriate. In each drawing, the same elements are given the same reference numerals, and duplicate explanations have been omitted as necessary.

(Embodiment 1)
A temporary fastening tool according to a first embodiment will be described. The temporary fastening tool of this embodiment is a temporary fastening tool that temporarily fastens a screw member to a screwed portion of a workpiece. The workpiece is, for example, a rear axle on which a screwed portion is formed. Note that the workpiece is not limited to a rear axle as long as it is a member on which a screwed portion is formed.

Figure 1 is a side view illustrating a temporary fastening tool according to the first embodiment. Figure 2 is a top view illustrating a temporary fastening tool according to the first embodiment. In Figure 1, a portion is shown in cross section. As shown in Figures 1 and 2, the temporary fastening tool 1 includes a tool body 10, a knob 20, a transmission mechanism 30, a socket 40, a socket tip 50, a pin 60, and a magnet 70. Note that some hatching and symbols have been omitted to avoid cluttering the figures. Similarly, some hatching and symbols may be omitted in the subsequent figures.

The tool body 10 is formed in a plate shape. Here, for convenience in explaining the temporary fastening tool 1, an XYZ Cartesian coordinate system is used. For example, a plane parallel to one surface of the plate-shaped tool body 10 is defined as the XY plane. The direction perpendicular to the one surface is defined as the Z axis direction, and the side of the one surface is defined as the +Z axis direction. For example, the +Z axis direction is referred to as the upward direction, and the -Z axis direction is referred to as the downward direction.

One surface of the plate-shaped tool body 10 is called the upper surface 11, and the other surface is called the lower surface 12. Note that the upper surface 11, the lower surface 12, the upper side, and the lower side are convenient names for explaining the temporary fastening tool 1, and do not indicate the direction when the temporary fastening tool 1 is used.

The knob 20 is rotatably installed on the tool body 10. The knob 20 has a cylindrical knob portion 21, a rod-shaped rotating shaft 22, and a gear 23. One end of the rotating shaft 22 is fixed to the knob portion 21. The other end of the rotating shaft 22 is rotatably supported in a hole 13 of the tool body 10. A gear 23 is fixed between one end and the other end of the rotating shaft 22. For example, the knob portion 21 and the gear 23 are arranged on the upper surface 11, and the rotating shaft 22 is inserted into the hole 13 from the upper surface 11 side. The central axes of the knob portion 21, the rotating shaft 22, and the gear 23 are aligned. As a result, when an operator of the tool body 10 grips the knob portion 21 with his fingers and rotates it relative to the tool body 10, the gear 23 rotates around the central axis as the rotation axis.

The transmission mechanism 30 is composed of gears and rotating shafts. The number of gears and rotating shafts corresponds to the number of sockets 40. For example, in the case of a four-shaft temporary fastening tool 1 having four sockets 40, the transmission mechanism 30 has four gears 31, four gears 32, and four rotating shafts 33. The tool body 10 has four through holes 14 corresponding to the number of rotating shafts 33. In the case of a two-shaft temporary fastening tool 1 having two sockets 40, the transmission mechanism 30 has two gears 31, two gears 32, and two rotating shafts 33. The tool body 10 has two through holes 14 corresponding to the number of rotating shafts 33. The number of sockets 40 is not limited to two or four, and may be any number as long as there is at least one. The gears 31 and 32 are arranged on the upper surface 11. The rotating shaft 33 is inserted into the hole 14 of the tool body 10 from the upper surface 11 side.

The transmission mechanism 30 has a gear 31 that meshes with the gear 23, a gear 32 that meshes with the gear 31, and a rotating shaft 33 fixed to the center of the gear 32. The tip of the rotating shaft 33 is fixed to the socket 40. When an operator grips the knob 21 with his fingers and rotates it, the socket 40 rotates via the transmission mechanism 30. In other words, the transmission mechanism 30 transmits the rotational driving force input to the knob 20 to the socket 40. The gear 23 rotates with the rotation of the knob 21, the gear 31 rotates due to the rotation of the gear 23, and the gear 32 rotates due to the rotation of the gear 31. This causes the rotating shaft 33 to rotate, and the socket 40 also rotates. In this way, the rotational driving force input to the knob 20 is transmitted to the socket 40 via the transmission mechanism 30.

The socket 40 has a rotation axis and is rotatably supported by the tool body 10. The socket 40 is disposed on the underside 12 of the tool body 10. The socket 40 is formed in a cylindrical shape. The upper surface 41 of the socket 40 on the tool body 10 side, i.e., the surface facing upward, is fixed to the rotation axis 33 that passes through the hole 14.

Figure 3 is a cross-sectional view illustrating the tool body 10 supporting the socket 40 in the temporary fastening tool 1 according to the first embodiment. As shown in Figure 3, the socket 40 is supported so that it can rotate in a swiveling manner relative to the tool body 10. For example, the inner diameter of the hole 14 of the tool body 10 is larger than the outer diameter of the rotating shaft 33. Also, for example, the nuts NT1 and NT2 are fixed to the upper surface 11 and lower surface 12 of the rotating shaft 33, respectively, and the distance between the nuts NT and NT2 is longer than the length of the hole 14, i.e., the thickness of the tool body 10. As a result, the socket 40 is supported so that it can swivel (i.e., the socket 40 can tilt) relative to the tool body 10 and can move up and down.

Figure 4 is a perspective view illustrating the socket 40 in the temporary fastening tool 1 according to the first embodiment. As shown in Figure 4, the socket 40 has an upper surface 41 facing upward and a bottom surface 42 facing downward. The bottom surface 42 contacts the upper surface of the head of the screw member. The bottom surface 42 is provided with a socket tip portion 50. The socket tip portion 50 is inserted into a hole or groove in the head of the screw member. In addition, the bottom surface 42 is provided with a number of pins 60 and two magnets 70.

Figure 5 is a perspective view illustrating a screw member that is temporarily fastened by the temporary fastening tool 1 according to the first embodiment. As shown in Figure 5, the screw member 80 has a cylindrical head 81 and a cylindrical shaft 82. The central axes of the head 81 and the shaft 82 are aligned. A hole 84 is formed in the upper surface 83 of the head 81. A groove 85 may be formed in the upper surface 83 of the head 81. An inner surface 86 is formed inside the hole 84 or the groove 85. The inner surface 86 may have, for example, a bottom surface 87 facing the upper surface 83 of the head 81, and a wall surface 88 connecting the top surface 83 and the bottom surface 87.

When the hole 84 is a hexagonal hole, the screw member 80 is, for example, a hexagonal socket bolt. When the hole 84 is a square hole, the screw member 80 is, for example, a square socket bolt. When the hole 84 is a cross hole, the screw member 80 is, for example, a cross socket bolt. When the groove 85 is a minus shape, the screw member 80 is, for example, a minus screw. When the groove 85 is a plus shape, the screw member 80 is, for example, a plus screw.

6(a) and (b) are diagrams illustrating the operation of inserting the socket tip 50 into the hole 84 of the screw member 80 in the temporary fastening tool 1 according to the first embodiment. As shown in FIG. 6(a), the socket tip 50 protrudes from the bottom surface 42 of the socket 40. The socket tip 50 is inserted into the hole 84 or groove 85 of the head 81 of the screw member 80. As a result, as shown in FIG. 6(b), the bottom surface 42 around the socket tip 50 contacts the top surface 83 of the head 81 of the screw member 80. The tip of the socket tip 50 may be formed in a tapered shape.

Figure 7 is a diagram illustrating the bottom surface 42 of the socket 40 in the temporary fastening tool 1 according to the first embodiment. Figure 7 shows the inscribed circle C of the hole 84 or groove 85 of the screw-fitting member 80, centered on the rotation axis of the socket 40. If the hole 84 is a hexagonal hole, the inscribed circle is a circle tangent to the six wall surfaces 88 of the hexagonal hole. If the hole 84 is a square hole, the inscribed circle is a circle tangent to the four wall surfaces 88 of the square hole. In the case of the groove 85, it is a circle tangent to the opposing wall surface 88.

As shown in FIG. 7, multiple pins 60 protrude from the bottom surface 42 of the socket 40. The multiple pins 60 protrude from the bottom surface 42 of the socket 40 around the socket tip 50. At least a portion of each pin is located outside the inscribed circle of the hole 84 or groove 85 centered on the rotation axis.

In this embodiment, the multiple pins 60 are two pins 60. The pins 60 are arranged in opposing positions across the rotation axis of the socket 40. In other words, the rotation axis is located between the two pins 60. Preferably, the two pins 60 are arranged in positions symmetrical with respect to the rotation axis. Note that, as described below, the number of pins 60 is not limited to two.

Each of the multiple pins 60 is formed in a generally cylindrical shape. The tip of the pin 60 may be formed in a tapered shape. Each pin 60 is inserted into a hole 84 or groove 85 in the head 81 of the screw-in member 80. When the socket 40 rotates with multiple pins 60 inserted into the hole 84 or groove 85 in the head 81 of the screw-in member 80, the side of the pin 60 hits the inner surface 86 (wall surface 88) of the hole 84 or groove 85, causing the screw-in member 80 to rotate and screw into the screwed portion.

Two magnets 70 are arranged on the bottom surface 42 of the socket 40. The magnets 70 are arranged on the bottom surface 42 of the socket 40 in positions that face each other across the rotation axis of the socket 40. Specifically, the magnets 70 are located on opposite sides of the rotation axis of the socket 40. Preferably, the two magnets 70 are arranged in positions that are symmetrical with respect to the rotation axis of the socket 40.

Here, when the socket 40 is viewed from below, the two magnets 70 are arranged in positions that do not overlap with the pins 60. For example, when two pins 60 are arranged, the direction in which the magnets 70 are connected on the bottom surface 42 of the socket 40 is perpendicular to the direction in which the pins 60 are connected. That is, assuming an inscribed circle centered on the rotation axis of the socket 40 on the bottom surface of the socket 40, the pins 60 are arranged at equal intervals along the inscribed circle when viewed from the rotation axis direction, and the magnets 70 are arranged between the pins 60 on the inscribed circle. Specifically, the two magnets 70 are arranged so that the phase of the magnets 70 is not the same as the phase of the pins 60. If the phase of one magnet 70 on the inscribed circle is 0° and the clockwise direction is positive, the phase of one pin 60 is 90°, the phase of the other magnet 70 is 180°, and the phase of the other pin 60 is 270°.

Figure 8 is a perspective view illustrating an automatic supply device that supplies a screw member 80 to the temporary fastening tool 1 according to the first embodiment. Figures 9 and 10 are diagrams illustrating an operation in which the temporary fastening tool 1, to which the screw member 80 according to the first embodiment has been supplied, temporarily fastens the screw member 80 to the screwed portion of the work. As shown in Figure 8, the temporary fastening tool 1 may be supplied with the screw member 80 by, for example, an automatic supply device 90. For example, the automatic supply device 90 arranges the screw members 80 at a predetermined position 91. The temporary fastening tool 1 magnetizes the heads 81 of the screw members 80 arranged at the predetermined position 91 to the bottom surface 42 of the socket 40 by a magnet 70.

Then, as shown in Figures 9 and 10, the temporary fastening tool 1 inserts the tip of the screw member 80, which is magnetized on the bottom surface 42 of the socket 40, into the portion to be screwed. Then, by rotating the knob portion 21, the pin 60 is hooked into the hole 84 or groove 85 of the socket 40 to temporarily fasten it. The features of the temporary fastening tool 1 are described in detail below.

<Relationship between outer diameter of socket and maximum diameter of threaded member>
FIG. 11 is a diagram illustrating the relationship between the outer diameter of the socket 40 and the maximum diameter of the screw member 80 according to the first embodiment. FIGS. 12(a) and 12(b) are diagrams illustrating the operation of inserting the socket tip portion 50 into the hole 84 or groove 85 of the screw member 80 in the temporary fastening tool 1 according to the first embodiment. As shown in FIGS. 11, 12(a) and 12(b), the outer diameter of the socket 40 is smaller than the maximum diameter of the screw member 80. Specifically, for example, the outer diameter of the socket 40 is smaller than the maximum diameter of the head 81 of the screw member 80. This makes it possible to suppress interference between the socket 40 and the adjacent screw members 80 when, for example, the automatic supply device 90 is used to supply the screw member 80 to the temporary fastening tool 1. Therefore, the socket tip portion 50 can be smoothly inserted into the hole 84 or groove 85 of the screw member 80 without the screw members 80 being misaligned.

Figure 13 is a diagram illustrating the operation of inserting the socket tip 50 into the hole of the screw member 80 in the temporary fastening tool 1 according to the comparative example. As shown in the comparative example of Figure 13, if the outer diameter of the socket 40 is larger than the maximum diameter of the screw member 80, it will interfere with adjacent screw members 80, causing the screw members 80 to become misaligned. This makes it difficult to insert the socket tip 50 into the hole 84 of the screw member 80.

<Relationship between the outer diameter of the socket tip and the inscribed circle of the hole or groove of the screw-on member>
14 is a diagram illustrating the relationship between the outer diameter of the socket tip portion 50 and the inscribed circle of the hole 84 or groove 85 of the screw member 80 in the temporary fastening tool 1 according to the first embodiment. FIGS. 15(a) to 15(d) are diagrams illustrating the operation of inserting the socket tip portion 50 into the hole 84 or groove 85 of the screw member 80 in the temporary fastening tool 1 according to the first embodiment. As shown in FIGS. 14 and 15(a) to 15(d), the outer diameter of the socket tip portion 50 is set smaller than the diameter of the inscribed circle C of the hole 84 or groove 85 of the screw member 80. With this configuration, it is possible to prevent the socket tip portion 50 from being gouged by the hole 84 or groove 85 of the screw member 80, and the socket tip portion 50 can be smoothly inserted into the hole 84 or groove 85.

<Attaching the magnet to the socket>
16A and 16B are diagrams illustrating mounting holes of the socket 40 to which the magnet 70 is attached in the temporary fastening tool 1 according to the first embodiment, where (a) shows the bottom surface 42 of the socket 40, (b) shows a cross section of the socket 40, and (c) shows the top surface 41 of the socket 40. The magnet 70 is shown in Fig. 16B.

16(a) to (c), the socket 40 has two mounting holes 43 extending in the direction of the rotation axis. Each mounting hole 43 may be a through hole connected from the top surface 41 to the bottom surface 42. A part of the opening of the mounting hole 43 on the bottom surface 42 side is blocked by the socket tip portion 50. Two magnets 70 are inserted into each mounting hole 43. For example, the magnet 70 is inserted into the mounting hole 43 from the top surface 41 side and pressed into the bottom surface 42 side. The magnet 70 is arranged on the bottom surface 42 side of the mounting hole 43. The magnet 70 may be exposed to the opening on the bottom surface 42 side. The magnet 70 is fixed at the part of the opening on the bottom surface 42 side that is blocked by the socket tip portion 50. In this way, a part of the opening on the bottom surface 42 is blocked so that a part of the magnet 70 hangs on the socket tip portion 50. This makes it possible to prevent the magnet 70 from coming off when pressed into the mounting hole 43. It also prevents the magnet 70 from becoming detached and getting lost.

The mounting holes 43 are formed on the bottom surface 42 of the socket 40 at positions facing each other across the rotation axis. Each mounting hole 43 is located on the opposite side of the rotation axis of the socket 40. Preferably, the two mounting holes 43 are formed at positions symmetrical with respect to the rotation axis of the socket 40.

The inner diameter of the mounting hole 43 is set to be slightly smaller than the outer diameter of the magnet 70. This makes it possible to prevent the magnet 70 from falling out when it is pressed in. It also makes it possible to prevent the magnet 70 from falling out and becoming lost.

<Magnet materials and magnetic poles>
FIG. 17 is a diagram illustrating the material and magnetic poles of the magnet 70 in the temporary fastening tool 1 according to the first embodiment. FIGS. 18(a) to 18(d) are diagrams illustrating the operation of magnetizing the screw member 80 to the socket 40 in the temporary fastening tool 1 according to the first embodiment. As shown in FIG. 17 and FIGS. 18(a) to 18(d), the magnet 70 desirably contains a neodymium magnet as a material. The magnet 70 containing a neodymium magnet can suppress the magnetization of the screw member 80 even if it is magnetized with the screw member 80 for a long time. Specifically, as shown in FIG. 18(a), the magnet 70 containing a neodymium magnet can suppress the magnetization of the screw member 80 when the screw member 80 is removed after being magnetized with the screw member 80 for a long time, as shown in FIG. 18(b). Note that the material of the magnet 70 is not limited to a neodymium magnet as long as it is a magnet.

The magnets 70 may be arranged so that the magnetic poles on the bottom surface 42 of the socket 40 are oriented in different directions. That is, one magnet 70 may have its N pole exposed on the bottom surface 42 of the socket 40, and the other magnet 70 may have its S pole exposed on the bottom surface 42 of the socket 40. By making the two magnets 70 on the bottom surface 42 have different poles, it is possible to prevent magnetic lines from escaping to the outside. Therefore, as shown in FIG. 18(c), the adjacent screw members 80 are not magnetized, and the magnets can be used near sensors that dislike magnetic forces. Also, as shown in FIG. 18(d), when one of the contacting screw members 80 is magnetized and lifted, it is possible to prevent the adjacent screw members 80 from being magnetized. In contrast, if the two magnets 70 on the bottom surface 42 have the same pole, the adjacent screw members 80 will be magnetized.

<Rotation pin>
19A to 19C are diagrams illustrating the socket 40 in which the pins 60 are arranged in the temporary fastening tool 1 according to the first embodiment, where (a) shows the bottom surface 42 of the socket 40, (b) shows a cross section of the socket 40, and (c) shows the bottom surface 42 of the socket 40 without the socket tip 50. As shown in Figs. 19A to 19C, when the socket 40 is viewed from below, the direction in which the two pins 60 are arranged may be perpendicular to the direction in which the two magnets 70 are arranged. That is, two rotation pins 60 may be arranged in a direction perpendicular to the mounting position of the magnets 70. The tip of the pin 60 may be tapered. The mounting position of the pin 60 is set so that at least a part of the pin 60 is located outside the inscribed circle of the hole 84 or groove 85 of the screw member 80 when viewed from the rotation axis direction.

20(a) and (b) are diagrams illustrating the operation of rotating the pin 60 by hitting it against the inner surface 86 of the hole 84 or groove 85 of the screw member 80 in the temporary fastening tool 1 according to the first embodiment. As shown in FIG. 20(a) and (b), the two pins 60 are hooked on the wall surface 88 of the hole 84 or groove 85 and rotated. Since at least a part of the pin 60 is located outside the inscribed circle of the hole 84 or groove 85 of the screw member 80, the pin 60 hits the wall surface 88 of the hole 84 or groove 85.

Figures 21(a) to (c) are diagrams illustrating the relationship between the pin 60 and the hole 84 or groove 85 of the screw member 80 in the temporary fastening tool 1 according to the first embodiment. Figure 21(b) shows the distance between the pins 60 in (a) and (c). As shown in Figures 21(a) and (c), when the hole 84 is a hexagonal hole and there are two pins 60, the narrower the distance between the pins 60, the larger the range that does not interfere with the two-face width of the hexagonal hole, making it easier for the pins 60 to enter the hexagonal hole.

Figures 22(a) to (d) are perspective views illustrating the operation of inserting the pin 60 into the hole 84 of the screw member 80 in the temporary fastening tool 1 according to the first embodiment. Figures 23(a) to (d) are plan views illustrating the operation of inserting the pin 60 into the hole 84 of the screw member 80 in the temporary fastening tool 1 according to the first embodiment. Figures 24(a) to (d) are cross-sectional views illustrating the operation of inserting the pin 60 into the hole 84 of the screw member 80 in the temporary fastening tool 1 according to the first embodiment.

22(a), 23(a) and 24(a), the socket tip 50 is inserted into the hexagonal hole of the screw member 80. At that time, as shown in FIG. 22(b), 23(b) and 24(b), the pin 60 may interfere with the two-face width of the screw member 80. Even in such a case, the socket 40 is supported on the tool body 10 so that it can swing and move up and down. Therefore, as shown in FIG. 22(c), 23(c) and 24(c), the socket 40 rotates slightly. This allows the pin 60 to be inserted into the hexagonal hole as shown in FIG. 22(d), 23(d) and 24(d). In addition, as described later, the socket 40 rotates slightly due to the nature of the magnet 70 magnetizing the magnetic material at the center position. This also allows the pin 60 to be inserted into the hexagonal hole.

<Magnetic properties>
25(a) and (b) are diagrams illustrating the properties of the magnet 70 in the temporary fastening tool 1 according to the first embodiment. The magnet 70 has a property of magnetizing a magnetic body at the center position. For example, even if the magnet 70 is magnetized at the corner portion 89 of the hexagonal hole as shown in FIG. 25(a), the socket 40 rotates due to the property of magnetizing the magnetic body at the center position of the magnet 70 as shown in FIG. 25(b). For example, the two pins 60 are arranged in a direction perpendicular to the direction in which the magnets 70 are connected. In addition, at least a part of the two pins 60 is located outside the inscribed circle C of the hole 84 or the groove 85. Therefore, in the state of FIG. 25(a), the pin 60 may not be inserted into the hole 84 or the groove 85. However, due to the property of the magnet 70, the state transitions to the state of FIG. 25(b), so that the pin 60 can be inserted into the hole 84 or the groove 85.

Next, the effects of this embodiment will be described. The temporary fastening tool 1 of this embodiment includes a socket 40 rotatably supported by the tool body 10. The socket tip 50, the pin 60, and the magnet 70 are arranged on the bottom surface 42 of the socket 40. Therefore, when the bottom surface 42 of the socket is magnetically attached to the head 81 of the screw member 80, the socket tip 50 is inserted into the hole 84 or groove 85 of the head 81 of the screw member 80. Accordingly, the multiple pins 60 are also inserted into the holes 84 or grooves 85. Therefore, when the socket 40 is rotated, the screw member 80 can be rotated by the pin 60 to screw the screwed portion. This allows the screw member having a hole or the like formed therein to be temporarily fastened with good workability.

The outer diameter of the socket 40 is smaller than the maximum diameter of the screw member 80, so interference with the screw member 80 can be suppressed. Therefore, the temporary fastening tool 1 can simultaneously magnetize and temporarily fasten multiple screw members 80. In addition, the temporary fastening tool 1 can magnetize the screw members 80 arranged in a predetermined position 91 by the automatic supply device 90 with the magnet 70, and hook the inner surface 86 of the hole 84, etc. with a pin to temporarily fasten them. Therefore, the screw members can be temporarily fastened with good workability.

By tapering the tip of the pin 60, it is possible to easily insert it into the hole 84 of the screw member 80. In addition, multiple pins 60 are arranged at equal intervals along the inscribed circle C, and each magnet 70 is arranged between the pins 60 lined up on the inscribed circle C. This allows the screw member 80 to rotate when the socket 40 is rotated with the pin 60 inserted into the hole 84 of the screw member 80.

By making the outer diameter of the socket tip 50 smaller than the diameter of the inscribed circle C, it is possible to make it easier to insert the socket tip 50 into the hole 84, etc.

If the direction in which the two magnets 70 are lined up is perpendicular to the direction in which the two pins 60 are lined up, even if the socket tip 50 interferes with the hole 84, etc., the magnetizing properties of the magnet 70 allow the socket 40 to be rotated and the socket tip 50 to be inserted into the hole 84, etc.

By arranging the magnets 70 so that their magnetic poles are oriented in different directions, magnetic field lines are not emitted to the outside, and magnetization of adjacent screw members 80 can be suppressed.

By blocking a portion of the opening of the through hole of the socket 40 with the socket tip 50, it is possible to prevent the magnet 70 from coming off when pressed in. In addition, by making the inner diameter of the through hole smaller than the outer diameter of the magnet 70, it is possible to prevent the magnet 70 from coming off when pressed in.

(Embodiment 2)
Next, a temporary fastening tool according to the second embodiment will be described. In the temporary fastening tool according to the second embodiment, the number of pins 60 is three or six instead of two. FIG. 26 is a diagram illustrating the bottom surface 42 of the socket 40 in the temporary fastening tool according to the second embodiment. FIGS. 27(a) and 27(b) are diagrams illustrating an operation of rotating the pin 60 by hitting it against the inner surface 86 of the hole 84 or the groove 85 of the screw member 80 in the temporary fastening tool according to the second embodiment. FIG. 28 is a diagram illustrating the bottom surface 42 of the socket 40 in a temporary fastening tool according to another example of the second embodiment. FIG. 29 is a diagram illustrating an operation of rotating the pin 60 by hitting it against the inner surface 96 of the hole 84 or the groove 85 of the screw member 80 in the temporary fastening tool according to another example of the second embodiment. 30(a) to (c) are diagrams illustrating an example of an operation of the temporary fastening tool according to the second embodiment, in which the pin 60 is abutted against the inner surface 86 of the hole 84 or the groove 85 of the threaded member 80 and rotated. The socket tip portion 50 is omitted in FIGS. 26 and 28.

As shown in Figures 26, 27(a) and (b), 28, and 29, the temporary tightening tool may have three or six pins 60.

When there are three pins 60, the pins 60 are arranged to form an equilateral triangle on the bottom surface 42 of the socket 40. The magnets 70 are arranged facing each other across the rotation axis of the socket 40. On the bottom surface 42 of the socket 40, the direction connecting the magnets 70 may be perpendicular to the bisector of one of the interior angles of the equilateral triangle.

When there are six pins 60, the pins 60 are arranged to form a regular hexagon on the bottom surface 42 of the socket 40. The magnets 70 are arranged facing each other across the rotation axis of the socket 40. On the bottom surface 42 of the socket 40, the direction in which the magnets 70 are connected may be perpendicular to the line connecting a pair of opposing vertices of the regular hexagon.

When there are three or six pins 60, it is preferable to make the outer diameter of the magnet 70 small. Also, it is preferable to make the length of the magnet 70 long. If the outer diameter of the magnet 70 is small and the processing effort and the number of pins 60 can be ignored, it is preferable to increase the number of pins 60 to three, six, etc. and make the distance between the pins 60 as narrow as possible. This makes it possible to increase the range where there is no interference.

As shown in FIG. 30(a), when three (or six) pins 60 are installed, if the magnetic force of the magnet 70 is strong enough to hold the screw member 80 even if the screw member 80 floats, the tip of the pin 60 does not need to be tapered. As shown in FIG. 30(b), when the tip of the pin 60 does not enter the hole 84 or groove 85 and the pin 60 rides up on the upper surface 83 of the screw member 80, the screw member 80 does not tilt even if it remains floating. Therefore, as shown in FIG. 30(c), the socket 40 can be rotated by the swivel movement of the socket 40 and the properties of the magnet 70, and the socket tip 50 can be inserted into the hole 84 or groove 85 of the screw member 80. This allows the pin 60 to be inserted into the hexagonal hole.

In contrast, in the case of two pins 60, when the pins 60 ride up on the upper surface 83 of the screw member 80, they are tilted to the left or right due to the magnetic force of the magnet 70, and it may be difficult to insert them into the hole 84 or groove 85 of the screw member 80 in a magnetized state. Therefore, in the case of two pins 60, it is preferable that the tip of the pin 60 is tapered to prevent the pins 60 from riding up on the upper surface 83 of the screw member 80.

According to this embodiment, the range of non-interference between the hole 84 or groove 85 of the screw member 80 and the pin 60 can be increased. In addition, even if the pin 60 rides up onto the upper surface 83 of the screw member 80, the screw member 80 does not tilt, so the tip of the pin 60 does not need to be tapered. Other configurations and effects are included in the description of embodiment 1.

The present invention is not limited to the above-described embodiment, and can be modified as appropriate without departing from the spirit of the invention. For example, a combination of the configurations of embodiments 1 and 2 is also included within the scope of the technical idea of this embodiment.

Reference Signs List 1 Temporary fastening tool 10 Tool body 11 Top surface 12 Bottom surface 13, 14 Hole 20 Knob 21 Knob portion 22 Rotating shaft 23 Gear 30 Transmission mechanism 31, 32 Gear 33 Rotating shaft 40 Socket 41 Top surface 42 Bottom surface 43 Mounting hole 50 Socket tip portion 60 Pin 70 Magnet 80 Screw member 81 Head 82 Shaft 83 Top surface 84 Hole 85 Groove 86 Inner surface 87 Bottom surface 88 Wall surface 89 Corner portion 90 Automatic supply device 91 Predetermined position

Claims (4)

A temporary fastening tool for temporarily fastening a screw member to a screwed portion of a workpiece,
A tool body and
A knob installed on the tool body;
At least one socket having a rotation axis, rotatably supported by the tool body, and having a bottom surface in contact with the head of the screw member;
a transmission mechanism that transmits a rotational driving force input to the knob to the socket;
a socket tip portion that protrudes from the bottom surface of the socket and is inserted into a hole or groove in the head portion;
a plurality of pins protruding from the bottom surface of the socket around the tip of the socket and adapted to be inserted into the holes or grooves;
Two magnets are arranged on the bottom surface of the socket at positions facing each other across the rotation axis;
Equipped with
The outer diameter of the socket is smaller than the maximum diameter of the threaded member,
When the socket is rotated with the pins inserted into the holes or grooves,
At least a portion of each pin is located outside an inscribed circle of the hole or the groove centered on the rotation axis;
When the side surface of the pin abuts against the inner surface of the hole or the groove, the screw member rotates and screws into the screwed portion ,
the plurality of pins are disposed at equal intervals along the inscribed circle on the bottom surface as viewed in the rotation axis direction,
Each magnet is disposed between the pins on the inscribed circle.
Temporary tightening tool. The tip of the pin is tapered.
The temporary fastening tool according to claim 1. The magnets are arranged such that the magnetic poles on the bottom surface of the socket are oriented in different directions.
The temporary fastening tool according to claim 1 or 2 . The socket has a through hole extending in the direction of the rotation axis,
a portion of the opening of the through hole on the bottom surface side is blocked by the tip portion of the socket,
The magnet is disposed on the bottom side of the through hole and is exposed to the opening.
The temporary fastening tool according to any one of claims 1 to 3 .

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