JP2021115659A - Nut temporary tightening tool - Google Patents

Abstract

To provide a nut temporary tightening tool that is lightweight and extremely less likely to strip the thread.SOLUTION: A nut temporary tightening tool 1 includes: a rotation shaft 30 formed with a helical groove 30a which extends in a slide direction of a slide member 20; an engagement part 23 engaging the helical groove 30a; a support member 40 for supporting the rotation shaft 30 so as to be capable of rotating; and a nut holding part 50 fixed in a tip of the rotation shaft 30 to hold a nut.SELECTED DRAWING: Figure 3

Description

The present invention relates to a nut temporary fastener for temporarily tightening a nut to a screw shaft.

Conventionally, when a component is fastened using a nut and a bolt, the nut is temporarily tightened and held by the shaft portion of the bolt, and then tightened with a predetermined tightening torque. The work of temporarily tightening the bolt while turning the nut by hand is troublesome and takes a lot of time.

Therefore, for example, if the nut is temporarily tightened using the electric temporary tightening tool disclosed in Patent Document 1, it is not necessary to turn the nut by hand, so that the temporary tightening work of the nut is easy and in a short time. It is thought that it will be possible. In this temporary fastener, an output shaft having a socket is rotatably supported in a housing to which a motor is mounted, and the rotational force of the motor is transmitted to the output shaft via a plurality of gears. A socket for holding a nut is fixed to the tip of the output shaft. When the motor is operated after applying the nut to the tip of the bolt shaft while holding the nut in the socket, the socket rotates and the nut can be screwed into the bolt shaft. ..

Japanese Unexamined Patent Publication No. 8-187629

However, in Patent Document 1, since an electric motor is used as a power source, the weight of the tool itself is heavy, and it cannot be said that the handling by the operator is good, and when a battery is built in as a power source, the weight is further increased. Will lead to an increase in. It is conceivable to supply electric power to the electric motor from the outside without using a battery, but in this case, there is a problem that the power strip interferes with the work.

Further, when the nut is applied to the tip of the shaft portion of the bolt during temporary tightening, the thread groove of the nut may not be properly engaged with the thread of the bolt. In the temporary fastener of Patent Document 1, since the rotational force of the electric motor is decelerated by a plurality of gears and transmitted to the socket, the rotational torque of the socket is large, and even if the screw groove is poorly engaged, it remains as it is. The nut may rotate, resulting in licking of the threads.

The present invention has been made in view of this point, and an object of the present invention is to provide a nut temporary fastener that is lightweight and has an extremely low risk of screw thread licking.

In order to achieve the above object, in the present invention, the linear motion by the operator is converted into the rotary motion by using the spiral groove, and the operator can perform a simple operation without using an electric motor. The nut was rotated so that it could be temporarily tightened.

The first invention is a nut temporary fastener for temporarily tightening a nut to a screw shaft, which is formed so as to surround a shaft-shaped member and the shaft-shaped member, and is slidable in the axial direction with respect to the shaft-shaped member. The slide member provided in the above, the rotating shaft arranged so as to extend in the slide direction of the slide member, and the spiral groove formed on the outer peripheral surface, and the engagement provided in the slide member and engaging with the spiral groove. It is characterized by including a portion, a support member fixed to the shaft-shaped member and rotatably supporting the rotary shaft, and a nut holding portion attached to the tip of the rotary shaft to hold the nut. And.

According to this configuration, when the nut is held by the nut holding portion, then applied to the tip of the screw shaft, and then the slide member is slid, the engaging portion provided on the slide member engages with the spiral groove of the rotating shaft. Since the rotating shaft moves in the axial direction in the fitted state, the rotating shaft rotates. Since the nut holding portion is fixed to the tip of the rotating shaft, the nut holding portion rotates and the nut rotates. The direction in which the nut turns can be set in the direction of the spiral groove. If a spiral groove is formed so that the nut turns in the direction in which it is screwed into the screw shaft, the nut is screwed into the screw shaft and temporarily tightened. Will be possible.

That is, since the simple operation of moving the slide member linearly can be converted into a rotary motion to rotate the nut in the screwing direction, the conventional electric motor becomes unnecessary and the weight of the temporary fastener can be reduced. It will be possible.

In addition, since the slide member is a member that the operator slides, when the force required to turn the nut is larger than in the normal case, for example, when the thread groove of the nut is poorly engaged, that is the case. , The operator can grasp the increase of the reaction force through the slide member. Therefore, it is possible to prevent the nut from being forcibly turned when the screw groove is poorly engaged, and the risk of licking the screw thread is extremely reduced.

In the second invention, the slide member includes a tubular member extending in the axial direction of the axial member, the tubular member is formed with a slit extending in the axial direction, and the axial member is formed with the tubular member. It is characterized in that a stopper portion to be inserted into the slit is provided.

According to this configuration, by inserting the stopper portion of the shaft-shaped member into the slit of the tubular member, when the tubular member moves in the direction of coming out of the shaft-shaped member, the stopper portion comes into contact with the peripheral edge portion of the slit. The tubular member is prevented from coming off from the shaft-shaped member.

A third invention is characterized in that the slide member includes an urging member that urges the slide member in a direction opposite to the tightening direction of the nut.

According to this configuration, when the operator slides the slide member in the nut tightening direction and then releases the slide member, for example, the slide member moves in the opposite direction to the nut tightening direction due to the urging force of the urging member. As it slides in the direction, it automatically returns to the initial position.

A fourth aspect of the present invention is characterized in that a plurality of the rotating shafts are provided, and the slide member is provided with a plurality of engaging portions corresponding to the rotating shafts.

According to this configuration, by sliding a single slide member, a plurality of rotation shafts can be rotated and nuts can be temporarily tightened.

A fifth aspect of the present invention is characterized in that the plurality of rotating shafts are arranged on the same circle centered on the shaft core of the shaft-shaped member when viewed from the axial direction.

According to this configuration, for example, when three nuts are arranged at unequal intervals, it is possible to arrange the rotating shafts according to the arrangement of the nuts.

The sixth invention is characterized in that the plurality of rotating shafts are arranged at equal intervals on the same circle centered on the shaft core of the shaft-shaped member when viewed from the axial direction.

According to this configuration, the relative positional relationship between the rotating shaft and the shaft-shaped member can be set so that the balance of forces is good.

A seventh invention is a nut temporary fastener for temporarily tightening a nut to a screw shaft, which is formed so as to surround the rotary shaft having a spiral groove formed on the outer peripheral surface thereof and the rotary shaft. A slide member provided so as to be slidable in the axial direction, an engaging portion provided on the slide member and engaged with the spiral groove, a support member rotatably supporting the rotation shaft, and rotation on the support member. It is provided with an output shaft that can be supported, a transmission mechanism that transmits the rotational force of the rotary shaft to the output shaft, and a nut holding portion that is fixed to the tip of the output shaft and holds the nut. It is characterized by.

According to this configuration, when the nut is held by the nut holding portion, then applied to the tip of the screw shaft, and then the slide member is slid, the engaging portion provided on the slide member engages with the spiral groove of the rotating shaft. Since the rotating shaft moves in the axial direction in the fitted state, the rotating shaft rotates. Since the rotational force of this rotating shaft is transmitted to the output shaft via the transmission mechanism, the output shaft rotates. Since the nut holding portion is fixed to the tip of the output shaft, the nut holding portion rotates and the nut rotates. The direction in which the nut turns can be set in the direction of the spiral groove. If a spiral groove is formed so that the nut turns in the direction in which it is screwed into the screw shaft, the nut is screwed into the screw shaft and temporarily tightened. Will be possible.

That is, since the simple operation of moving the slide member linearly can be converted into a rotary motion to rotate the nut in the screwing direction, the conventional electric motor becomes unnecessary and the weight of the temporary fastener can be reduced. It will be possible.

In addition, since the slide member is a member that the operator slides, when the force required to turn the nut is larger than in the normal case, for example, when the thread groove of the nut is poorly engaged, that is the case. , The operator can grasp the increase of the reaction force through the slide member. Therefore, it is possible to prevent the nut from being forcibly turned when the screw groove is poorly engaged, and the risk of licking the screw thread is extremely reduced.

An eighth invention is characterized in that the plurality of output shafts are provided, and the transmission mechanism transmits the rotational force of the rotating shafts to the plurality of output shafts.

A ninth aspect of the present invention is characterized in that the plurality of output shafts are arranged on the same circle centered on the axis of the rotating shaft when viewed from the axial direction.

A tenth aspect of the present invention is characterized in that the plurality of output shafts are arranged at equal intervals on the same circle centered on the axis of the rotating shaft when viewed from the axial direction.

An eleventh invention is characterized in that the transmission mechanism has a drive gear fixed to the rotating shaft and a driven gear fixed to the output shaft and arranged so as to mesh with the drive gear. And.

According to this configuration, the rotational force of the rotating shaft can be transmitted to the output shaft by the gear mechanism. By changing the number of teeth of the driving gear and the number of teeth of the driven gear, it is possible to reduce the rotational speed of the rotating shaft and transmit it to the output shaft, or increase the speed and transmit it to the output shaft.

A twelfth invention is characterized in that a magnet is provided in the nut holding portion.

According to this configuration, the nut made of a magnetic material can be easily held by the nut holding portion, and the nut can be easily detached from the nut holding portion.

According to the first invention, the linear movement of the slide member by the operator can be converted into a rotational movement by the spiral groove of the rotating shaft to rotate the nut, so that the nut temporary fastener can be made lighter. At the same time, it is possible to extremely reduce the risk of licking the screw thread when the thread groove of the nut is poorly engaged.

According to the second invention, the stopper portion of the shaft-shaped member can be inserted into the slit of the cylinder member in a state where the shaft-shaped member is inserted into the cylinder member of the slide member. As a result, it is possible to prevent the tubular member from coming off from the shaft-shaped member, and the slide member and the shaft-shaped member can be kept integrated.

According to the third invention, since the slide member can be urged in the direction opposite to the tightening direction of the nut, the slide member can be automatically returned to the initial position after the nut is temporarily tightened. Workability can be improved.

According to the fourth invention, since a plurality of rotating shafts are provided, a plurality of nuts can be temporarily tightened at the same time by sliding a single slide member, and work efficiency can be improved.

According to the fifth invention, since the rotating shaft can be arranged according to the arrangement of the nuts, the applicable range of the present invention can be expanded.

According to the sixth invention, a plurality of rotation axes can be arranged so that the force balance is good.

According to the seventh invention, as in the first invention, the nut temporary fastener can be made lighter, and the risk of licking the screw thread when the thread groove of the nut is poorly engaged can be extremely reduced. can.

According to the eighth invention, the rotational force of the rotating shaft can be transmitted to the plurality of output shafts, and the plurality of nuts can be temporarily tightened at the same time.

According to the ninth invention, since the output shaft can be arranged according to the arrangement of the nuts, the applicable range of the present invention can be expanded.

According to the tenth invention, a plurality of rotation axes can be arranged so as to have a good balance of forces.

According to the eleventh invention, the rotational force of the rotating shaft can be reliably transmitted to the output shaft by the gear mechanism. Further, by setting the number of teeth, the rotation speed of the rotating shaft can be decelerated and transmitted to the output shaft, or the speed can be increased and transmitted to the output shaft.

According to the twelfth invention, the nut can be easily attached to and detached from the nut holding portion.

It is a side view of the nut temporary fastener which concerns on Embodiment 1 of this invention. It is a side view of the nut temporary fastener after the temporary tightening is completed. It is a perspective view which looked at the nut temporary fastener from above. It is a perspective view which looked at the slide member from above. It is an exploded perspective view of the nut temporary fastener which omitted the slide member. FIG. 5 is a sectional view taken along line VI-VI in FIG. It is a top view of an oil pan. FIG. 7 is a cross-sectional view taken along the line VIII-VIII in FIG. It is a side view of the nut temporary fastener which concerns on Embodiment 1 of this invention. FIG. 9 is a cross-sectional view taken along the line X-X in FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is essentially merely an example and is not intended to limit the present invention, its application or its use.

(Embodiment 1)
1 to 3 show a nut temporary clamp 1 according to the first embodiment of the present invention. The nut temporary fastener 1 is a tool for temporarily tightening the nut N to the screw shaft, and is used, for example, when the nut N is temporarily tightened to the shaft portion (screw shaft) of a bolt provided in various automobile parts. NS. In this example, as shown in FIGS. 7 and 8, the case where the accessory part 200 is fastened to the oil pan 100 with the bolt 300 and the nut N (shown in FIG. 1) will be described. The bolt 300 is a welding bolt. The oil pan 100 is, for example, a member provided at the bottom of an internal combustion engine or an automatic transmission. FIG. 7 is a view of the oil pan 100 viewed from above. The oil pan 100 is provided on the bottom wall portion 101, the side wall portion 102 extending upward from the bottom wall portion 101, and the upper end portion of the side wall portion 102. It has a flange portion 103. As shown in FIG. 8, the bottom wall portion 101 is formed with an opening 101a corresponding to the mounting position of the accessory 200, and three fastening holes 101b are formed on the bottom wall so as to surround the opening 101a. It is formed so as to penetrate the portion 101. The shaft portion 300b of the bolt 300 is inserted into each fastening hole 101b. The head portion 300a of the bolt 300 is located inside the oil pan 100 and is projected welded to the bottom wall portion 101. The projection welding method is a welding method in which a protrusion is formed on a welded portion and an electric current is concentrated on the protrusion to obtain a welded portion similar to spot welding. According to the projection welding method, since the range in which resistance heat is generated is limited to a small range, there is an advantage that the heat effect during welding can be suppressed.

The shaft portion 300b of the bolt 300 projects downward from the fastening hole 101b, and the accessory part 200 can be fastened to the oil pan 100 by screwing the nut N into the shaft portion 300b.

In this example, after setting the three bolts 300 on the bottom wall portion 101 of the oil pan 100, the three bolts 300 can be welded to the bottom wall portion 101 at once by a conventionally known projection welding device. can. Then, after welding the three bolts 300 and setting the accessory 200, the three nuts N can be temporarily tightened.

By using the nut temporary fastener 1 of the present embodiment, it is possible to set the three nuts N to the bolt 300 of the bottom wall portion 101 of the oil pan 100 at a time as described below. The nut temporary fastener 1 is not limited to the case where the nut N is set on the bolt 300 of the bottom wall portion 101 of the oil pan 100, and is not limited to the case where the nut N is set on various parts and members. Can be used for. Further, the number of nuts that can be set at one time is not limited to three, and may be two or less, or four or more.

Further, the present invention can be applied when the nut N is temporarily tightened to a part having a bottom wall portion and a peripheral wall portion other than the oil pan 100.

(Structure of nut temporary fastener 1)
The nut temporary fastener 1 includes a shaft-shaped member 10, a slide member 20, a rotating shaft 30, a support member 40, and a nut holding portion 50, and these are made of, for example, a metal material or the like. In this embodiment, the upper side of FIGS. 1 to 5 is referred to as the upper side of the nut temporary fastener 1, and the lower side of FIGS. 1 to 5 is referred to as the lower side of the nut temporary fastener 1. It is defined for convenience and does not limit the posture during actual use. The nut temporary fastener 1 can also be used sideways, for example.

The shaft-shaped member 10 extends linearly in the vertical direction. In this embodiment, the shaft-shaped member 10 is composed of a columnar member, but the present invention is not limited to this, and the shaft-shaped member 10 may be composed of a prismatic member or a tubular member. It may have been done. As shown in FIG. 5, a pin insertion hole 10a is formed so as to penetrate in the radial direction in a portion of the shaft-shaped member 10 above the central portion in the vertical direction. A pin 11 that is long in the radial direction of the shaft-shaped member 10 is inserted into the pin insertion hole 10a. The dimension of the pin 11 in the longitudinal direction is set longer than the outer diameter dimension of the shaft-shaped member 10, and both ends of the pin 11 project from the outer peripheral surface of the shaft-shaped member 10 in both directions. The pin 11 can be fixed to the shaft-shaped member 10 with both ends protruding from the outer peripheral surface of the shaft-shaped member 10 in both directions. In the state before assembly shown in FIG. 5, the pin 11 is not inserted into the pin insertion hole 10a of the shaft-shaped member 10.

As shown in FIG. 3, the slide member 20 includes a tubular member formed so as to surround the outer peripheral surface of the shaft-shaped member 10, and is provided so as to be slidable in the axial direction with respect to the shaft-shaped member 10. There is. That is, when the shaft-shaped member 10 is inserted into the slide member 20, the shaft core of the slide member 20 and the shaft core of the shaft-shaped member 10 substantially coincide with each other, and the inner peripheral surface of the slide member 20 is formed. It is formed so as to be slidable in the axial direction with respect to the outer peripheral surface of the shaft-shaped member 10. The inner diameter of the slide member 20 and the outer diameter of the shaft member 10 are set so that the slide member 20 can be moved in the vertical direction with a small force while the shaft-shaped member 10 is fixed. The axial dimension of the slide member 20 is set shorter than the axial dimension of the axial member 10, and when the axial member 10 is inserted into the slide member 20, the axial member 10 is at least the slide member 20. It is designed to protrude from one end.

As shown in FIG. 4, the slide member 20 is formed so that a pair of slits 20a and 20a extending in the axial direction are located at the same height. The slits 20a and 20a are formed point-symmetrically with the axis of the slide member 20 as the center of symmetry. The longitudinal directions of the slits 20a and 20a are in the vertical direction, and the dimensions of the slits 20a and 20a in the longitudinal direction are the same. Further, the widths of both slits 20a and 20a are also the same.

Pins 11 are inserted into both slits 20a and 20a. For example, by pulling out the pin 11 from the pin insertion hole 10a of the shaft-shaped member 10, the shaft-shaped member 10 can be inserted into the slide member 20. After inserting the shaft-shaped member 10 into the slide member 20, the pin 11 can be inserted from one slit 20a into the pin insertion hole 10a and then inserted into the other slit 20a. As shown in FIG. 3, the length of the pin 11 is set so as to project outward from both slits 20a and 20a of the slide member 20.

Therefore, when the slide member 20 is slid upward with respect to the shaft-shaped member 10, the pin 11 comes into contact with the lower edge portion of the slit 20a of the slide member 20 and the rising end position of the slide member 20 is defined ( (See FIG. 1). Further, when the slide member 20 is slid downward with respect to the shaft-shaped member 10, the pin 11 comes into contact with the upper edge portion of the slit 20a of the slide member 20 and the lower rising end position of the slide member 20 is defined. (See FIG. 2). Therefore, the pin 11 is a member corresponding to the stopper portion of the present invention. The position shown in FIG. 1 is the initial position, and the position shown in FIG. 2 is the temporary tightening completion position.

A plate member 21 is fixed to the lower end of the slide member 20, and the plate member 21 can also move in the vertical direction with respect to the shaft-shaped member 10 together with the slide member 20. The plate member 21 can be formed in a circular shape, for example, and the lower end portion of the slide member 20 is fixed to the central portion thereof. A through hole 21a is formed in the central portion of the plate member 21. The through hole 21a and the opening at the lower end of the slide member 20 coincide with each other and communicate with each other. The through hole 21a has a diameter into which the shaft-shaped member 10 can be inserted.

Three guide cylinders 22 for guiding the rotating shaft 30 are fixed to the plate material 21, and these three guide cylinders 22 can also move in the vertical direction with respect to the shaft-shaped member 10 together with the slide member 20. There is. The guide cylinder 22 is composed of a cylindrical member extending in the vertical direction, and the shaft core of the guide cylinder 22 is parallel to the shaft core of the slide member 20. The guide cylinder 22 penetrates the plate material 21 in the thickness direction (vertical direction), and projects upward from the upper surface of the plate material 21 and downward from the lower surface of the plate material 21. The opening at the upper end of the guide cylinder 22 is set smaller than the opening at the lower end. The three guide cylinders 22 are made of the same member.

When viewed from the axial direction (upper side), the three guide cylinders 22 are arranged at equal intervals in the circumferential direction on the same circle centered on the axis of the axial member 10. Therefore, an equilateral triangle can be drawn by connecting the shaft cores of the three guide cylinders 22, and the shaft core of the shaft-shaped member 10 is located at the center of the equilateral triangle. The guide cylinders 22 may be arranged at unequal intervals, and can be arranged according to the arrangement of the nuts N.

The rotation shaft 30 is arranged so as to extend in the slide direction of the slide member 20. In this embodiment, three rotating shafts 30 are provided, and these three rotating shafts 30 are made of the same member. A spiral groove 30a continuous in the vertical direction is formed on the outer peripheral surface of the rotating shaft 30. The upper end of the spiral groove 30a is open at the upper end surface of the rotating shaft 30.

The upper portion of the rotating shaft 30 is inserted into the guide cylinder 22. The axial dimension of the rotating shaft 30 is set longer than the axial dimension of the guide cylinder 22, and when the rotating shaft 30 is inserted into the guide cylinder 22, the lower portion of the rotating shaft 30 is the guide cylinder 22. It protrudes downward from the lower end.

The inner diameter of the guide cylinder 22 is set so that the rotating shaft 30 can be moved in the vertical direction with respect to the guide cylinder 22 in a state where the upper portion of the rotating shaft 30 is inserted into the guide cylinder 22. Further, with the rotating shaft 30 inserted into the guide cylinder 22, the rotating shaft 30 is guided in the vertical direction by the inner peripheral surface of the guide cylinder 22. The opening diameter of the upper end of the guide cylinder 22 is set to be smaller than the outer diameter of the rotating shaft 30, so that the rotating shaft 30 does not protrude upward from the opening of the upper end of the guide cylinder 22. Further, at the initial position shown in FIG. 1, the position of the slide member 20 is set so that the rotating shaft 30 does not come out from the lower end portion of the guide cylinder 22.

Since the three rotating shafts 30 are inserted into the corresponding guide cylinders 22, the three rotating shafts 30 are on the same circle centered on the shaft core of the shaft-shaped member 10 when viewed from the axial direction. They will be arranged at equal intervals in the circumferential direction. When the guide cylinders 22 are arranged at unequal intervals, the rotating shafts 30 are also arranged at unequal intervals.

As shown in FIG. 4, the slide member 20 is provided with a plurality of engaging portions 23 that engage with the spiral groove 30a corresponding to the rotating shaft 30. The engaging portion 23 is fixed to the guide cylinder 22 which constitutes a part of the slide member 20. Specifically, in the lower portion of the guide cylinder 22, a mounting hole 22a for mounting the engaging portion 23 is formed so as to penetrate the peripheral wall portion of the guide cylinder 22 in the thickness direction. As shown in FIG. 6, the engaging portion 23 is composed of a pin-shaped member. The engaging portion 23 can be fixed in a state of being inserted into the mounting hole 22a of the guide cylinder 22, and in this state, the engaging portion 23 projects inward of the guide cylinder 22. The portion of the engaging portion 23 that protrudes inward of the guide cylinder 22 enters the spiral groove 30a of the rotating shaft 30 and engages with the guide cylinder 22. Two engaging portions 23 may be provided for one guide cylinder 22, or one engaging portion 23 may be provided. The protrusion amount and diameter of the engaging portion 23 are set so as not to be in strong sliding contact with the spiral groove 30a.

The support member 40 is a member that rotatably supports the lower portion of the rotating shaft 30. That is, the support member 40 is composed of a circular plate material orthogonal to the axis of the shaft-shaped member 10, and the central portion thereof is fixed to the lower end portion of the shaft-shaped member 10. The support member 40 is formed with three support holes 40a through which the rotating shaft 30 is inserted. The positions of these three support holes 40a are also arranged at equal intervals in the circumferential direction on the same circle centered on the axis of the axial member 10 when viewed from the axial direction. The rotating shaft 30 is rotatable around the axis of the rotating shaft 30 with its lower portion inserted into the support hole 40a. Further, the rotating shaft 30 is provided with a stopper (not shown) so as not to come out of the support hole 40a.

As shown in FIG. 1, the nut temporary fastener 1 includes a coil spring 41 as an urging member that urges the slide member 20 in a direction opposite to the tightening direction (downward direction) of the nut N (upward direction). ing. The coil spring 41 is arranged on the outside of the shaft-shaped member 10 so that the expansion / contraction direction is the vertical direction. The lower end of the coil spring 41 abuts on the upper surface of the support member 40, while the upper end of the coil spring 41 is held by abutting on or near the lower end of the slide member 20 from below.

A nut holding portion 50 for holding the nut N is attached to the tip end portion of the rotating shaft 30. The nut holding portion 50 is composed of a socket or the like, and has a nut insertion hole 50a that opens at the lower end surface. The nut insertion hole 50a has a shape corresponding to the outer shape of the nut N, and if the cross section of the nut N is hexagonal, the cross section of the nut insertion hole 50a is also hexagonal, and the nut N inserted into the nut insertion hole 50a. Is shaped so that it does not run idle.

The nut holding portion 50 can be changed according to the size and shape of the nut N. For example, by attaching the nut holding portion 50 to the tip of the rotating shaft 30 so as to be detachable, when the type of the nut N is changed, the nut holding portion 50 can be easily attached to another nut holding portion 50. Can be changed.

A magnet 50b can be provided on the nut holding portion 50. The magnet 50b is a member for attracting the nut N made of a magnetic material inserted into the nut insertion hole 50a so as not to fall. The position where the magnet 50b is provided is not limited to the position shown in the figure, and can be provided at any position. By providing the magnet 50b, the nut N can be easily held by the nut holding portion 50, and the nut N can be easily separated from the nut holding portion 50.

(how to use)
Next, a method of using the nut temporary fastener 1 configured as described above will be described. First, the nut N is inserted into the nut insertion hole 50a of the nut holding portion 50 and held by the nut holding portion 50. After that, the shaft portion 300b of the bolt 300 is inserted into the hole of the nut N, and the nut N is brought into contact with the shaft portion 300b. Next, when the slide member 20 is slid downward, the engaging portion 23 provided on the slide member 20 moves in the axial direction of the rotating shaft 30 in a state of being engaged with the spiral groove 30a of the rotating shaft 30. Therefore, the rotation shaft 30 rotates. Since the nut holding portion 50 is fixed to the tip end portion of the rotating shaft 30, the nut holding portion 50 rotates and the nut N rotates. The direction in which the nut N turns can be set in the direction of the spiral groove 30a, and if the spiral groove 30a is formed so that the nut N turns in the direction of screwing into the shaft portion 300b of the bolt 300, the nut N can be bolted. It can be temporarily tightened by being screwed into the shaft portion 300b of 300.

That is, since the simple operation of linearly moving the slide member 20 can be converted into the rotational movement of the rotating shaft 30 by the spiral groove 30a and the nut N can be rotated in the screwing direction, the conventional electric motor is unnecessary. Therefore, the weight of the temporary fastener 1 can be reduced.

Further, since the slide member 20 is a member that the operator slides, when the force required to turn the nut N is larger than in the normal case, for example, when the screw groove of the nut N is poorly engaged, the slide member 20 is a member to be slid. The operator can grasp this as an increase in the reaction force via the slide member 20. Therefore, it is possible to prevent the nut N from being forcibly turned when the screw groove is poorly engaged, and the risk of licking the screw thread is extremely reduced.

(Action and effect of the embodiment)
As described above, according to the nut temporary fastener 1 according to this embodiment, the linear movement of the slide member 20 by the operator is converted into a rotational movement by the spiral groove 30a of the rotating shaft 30, and the nut N is converted into the nut N. Since it can be turned, the nut temporary fastener 1 can be made lighter, and the risk of licking the screw thread when the thread groove of the nut N is poorly engaged can be extremely reduced.

(Embodiment 2)
9 and 10 show a nut temporary clamp 1 according to a second embodiment of the present invention. This second embodiment is different from that of the first embodiment in that only one shaft having a spiral groove is used and the rotational force of the shaft is transmitted to the nut holding portion via a transmission mechanism. ing. Hereinafter, the same parts as those in the first embodiment are designated by the same reference numerals, the description thereof will be omitted, and the different parts will be described in detail.

The temporary nut fastener 1 of the second embodiment is formed so as to surround the rotating shaft 55 having a spiral groove 55a formed on the outer peripheral surface thereof and the rotating shaft 55, and is provided so as to be slidable in the axial direction with respect to the rotating shaft 55. A slide member 60, an engaging portion 61 provided on the slide member 60 and engaging with the spiral groove 55a, a support member 70 that rotatably supports the rotation shaft 55, and an output rotatably supported by the support member 70. It includes a shaft 80, a transmission mechanism 90 that transmits the rotational force of the rotary shaft 55 to the output shaft 80, and a nut holding portion 50 that is fixed to the tip of the output shaft 80 and holds the nut N.

Only one rotating shaft 55 is provided and extends in the vertical direction. The slide member 60 is composed of a tubular member into which the rotary shaft 55 can be inserted, and is slidable in the vertical direction with respect to the rotary shaft 55 with the rotary shaft 55 inserted. The engaging portion 61 is fixed to the slide member 60 in the same manner as the engaging portion 23 of the first embodiment. The engaging portion 61 projects from the inner peripheral surface of the slide member 60 toward the inside of the slide member 60, and the tip end portion of the engaging portion 61 engages with the spiral groove 55a.

The support member 70 includes an upper plate portion 71, a lower plate portion 72 arranged downward from the upper plate portion 71, and a connecting member 73 connecting the upper plate portion 71 and the lower plate portion 72. The upper plate portion 71 and the lower plate portion 72 can be formed in a circular shape. The rotating shaft 55 penetrates the center of the upper plate portion 71 and extends until it reaches the vicinity of the upper surface of the lower plate portion 72. The rotating shaft 55 is rotatably supported with respect to the upper plate portion 71, and the rotating shaft 55 is prevented from coming off by a stopper or the like (not shown).

Three output shafts 80 are provided as in the rotary shaft 30 of the first embodiment. That is, the output shaft 80 is arranged on the same circle centered on the axis of the rotating shaft 30 when viewed from the axial direction. Further, the output shafts 80 are arranged at equal intervals on the same circle centered on the axis of the rotating shaft 30 when viewed from the axial direction. The output shaft 80 penetrates the upper plate portion 71 and the lower plate portion 72 in the vertical direction. The output shaft 80 is prevented from falling off from the support member 70 by the stopper 81, and is rotatably supported by the upper plate portion 71 and the lower plate portion 72 in this state.

As shown in FIG. 10, the transmission mechanism 90 has a drive gear 91 fixed to the rotary shaft 55 and a driven gear 92 fixed to the output shaft 80 and meshing with the drive gear 91. The drive gear 91 and the driven gear 92 can be arranged between the upper plate portion 71 and the lower plate portion 72 of the support member 70. The gear ratio between the drive gear 91 and the driven gear 92 may be a ratio capable of decelerating the rotational speed of the rotary shaft 55 and transmitting it to the output shaft 80, or increasing the rotational speed of the rotary shaft 55. It may be a ratio that can be transmitted to the output shaft 80.

When the nut temporary fastener 1 of the second embodiment is used, the nut N is held by the nut holding portion 50, then applied to the tip of the shaft portion 300b of the bolt 300, and then the slide member 60 is slid to slide. Since the engaging portion 61 provided on the member 60 moves in the axial direction of the rotating shaft 55 in a state of being engaged with the spiral groove 55a of the rotating shaft 55, the rotating shaft 55 rotates. The rotational force of the rotating shaft 55 is simultaneously transmitted to the three output shafts 80 via the transmission mechanism 90, and the output shafts 80 rotate at the same speed. Since the nut holding portion 50 is fixed to the tip of the output shaft 80, the nut holding portion 50 rotates to rotate the nut N, and the nut N is screwed into the shaft portion 300b of the bolt 300 to be temporarily tightened. Becomes possible.

Therefore, the nut temporary fastener 1 of the second embodiment can also have the same effect as that of the first embodiment.

The above embodiments are merely exemplary in all respects and should not be construed in a limited way. Furthermore, all modifications and modifications that fall within the equivalent scope of the claims are within the scope of the present invention. For example, the slide member 60 can be urged upward by providing an urging member made of a coil spring in the second embodiment as well. Further, the number of nuts N temporarily tightened at one time is not limited to three, and can be any number.

As described above, the nut temporary fastener according to the present invention can be used, for example, when temporarily tightening a nut to a bolt of an automobile part or the like.

1 Nut temporary fastener 10 Shaft-shaped member 20 Slide member 23 Engagement part 30 Rotating shaft 30a Spiral groove 40 Support member 41 Coil spring (biasing member)
50 Nut holding part 55 Rotating shaft 60 Slide member 61 Engaging part 70 Support member 80 Output shaft 90 Transmission mechanism 91 Drive gear 92 Driven gear 300 Bolt 300b Shaft part (screw shaft)
N nut

Claims (12)

In the nut temporary fastener for temporarily tightening the nut to the screw shaft,
Shaft-shaped member and
A slide member formed so as to surround the shaft-shaped member and slidably provided in the axial direction with respect to the shaft-shaped member.
A rotating shaft arranged so as to extend in the slide direction of the slide member and having a spiral groove formed on the outer peripheral surface,
An engaging portion provided on the slide member and engaged with the spiral groove,
A support member fixed to the shaft-shaped member and rotatably supporting the rotation shaft,
A nut temporary fastener that is attached to the tip end portion of the rotating shaft and includes a nut holding portion that holds the nut. In the nut temporary fastener according to claim 1,
The slide member includes a tubular member extending in the axial direction of the shaft-shaped member.
A slit extending in the axial direction is formed in the tubular member.
A nut temporary fastener characterized in that the shaft-shaped member is provided with a stopper portion to be inserted into the slit. In the nut temporary fastener according to claim 2,
A nut temporary fastener comprising an urging member that urges the slide member in a direction opposite to the tightening direction of the nut. In the nut temporary fastener according to any one of claims 1 to 3,
With a plurality of the rotating shafts
A nut temporary fastener characterized in that a plurality of engaging portions are provided on the slide member corresponding to the rotating shaft. In the nut temporary fastener according to claim 4,
A nut temporary fastener characterized in that the plurality of rotating shafts are arranged on the same circle centered on the shaft core of the shaft-shaped member when viewed from the axial direction. In the nut temporary fastener according to claim 5,
A nut temporary fastener characterized in that the plurality of rotating shafts are arranged at equal intervals on the same circle centered on the shaft core of the shaft-shaped member when viewed from the axial direction. In the nut temporary fastener for temporarily tightening the nut to the screw shaft,
A rotating shaft with a spiral groove formed on the outer peripheral surface,
A slide member formed so as to surround the rotation axis and slidably provided in the axial direction with respect to the rotation axis.
An engaging portion provided on the slide member and engaged with the spiral groove,
A support member that rotatably supports the rotating shaft and
An output shaft rotatably supported by the support member,
A transmission mechanism that transmits the rotational force of the rotating shaft to the output shaft,
A nut temporary fastener which is fixed to a tip end portion of the output shaft and includes a nut holding portion for holding the nut. In the nut temporary fastener according to claim 7,
With a plurality of the output shafts
The transmission mechanism is a nut temporary fastener characterized by transmitting the rotational force of the rotating shaft to a plurality of the output shafts. In the nut temporary fastener according to claim 8,
A nut temporary fastener characterized in that the plurality of output shafts are arranged on the same circle centered on the axis of the rotating shaft when viewed from the axial direction. In the nut temporary fastener according to claim 9,
A nut temporary fastener characterized in that the plurality of output shafts are arranged at equal intervals on the same circle centered on the axis of the rotating shaft when viewed from the axial direction. In the nut temporary fastener according to any one of claims 7 to 10.
The transmission mechanism has a drive gear fixed to the rotating shaft and a driven gear fixed to the output shaft and arranged so as to mesh with the drive gear. .. In the nut temporary fastener according to any one of claims 1 to 11.
A nut temporary fastener characterized in that a magnet is provided in the nut holding portion.

Images