JP4252724B2 - Tightening tool - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a socket for fitting a rotating object such as a bolt, and a tightening tool for tightening a bolt or the like in a state where a rotating shaft for rotating the socket is bent through a universal joint.
[0002]
[Prior art]
As a tightening electric tool that can be tightened in a state where the socket and the rotating shaft are bent, for example, Japanese Patent Application Laid-Open No. 9-201777, “Coupling tool for electric rotation” is known.
According to FIGS. 1 and 3 of the same publication, the above technique includes a front body 2 for attaching the tool 1, a rear body 4 connected to the front body 2 via a universal joint 5, and the rear body 4. It is a joint tool for electric rotation composed of an electric rotating tool 3 to be rotated and a lock pin 6 for use in a state where the front body 2 and the rear body 4 are in series or bent.
[0003]
[Problems to be solved by the invention]
Since the above-mentioned joint tool for electric rotation can be used in a series state or a bent state, it is versatile as a tightening tool and is suitable for general use.
However, in a production line or the like, the work in one process is a work of a fixed part, and a tool with high versatility is not necessarily suitable.
Therefore, the front body 2 (hereinafter referred to as a “socket”) and the rear body 4 (hereinafter referred to as a “rotary shaft”) and a dedicated fastening that can be set at a predetermined angle while being bent and held in the initial state. An attachment tool is desired.
[0004]
That is, an object of the present invention is to provide a tightening tool that can be set to a predetermined angle in a state where a socket and a rotary shaft are bent in advance.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, a socket is swingably attached to the tip of the rotating shaft via a cross pin, and a spring and a slide piece are built in the socket, and the tip of the rotating shaft is inserted into the socket via the slide piece This is a tightening tool with a structure that prevents the socket from wobbling before being fitted to a rotating object such as a bolt by pushing the tip of the rotating shaft with the angle of θ1 with respect to the plane perpendicular to the rotating shaft. The taper surface having an angle is formed, and the surface on the slide piece side in contact with the taper surface is an inclined surface having an angle of θ2 with respect to the surface orthogonal to the socket axis, so that the initial stage before fitting to the rotating object The state is characterized in that the socket is bent at an angle of θ1 + θ2 with respect to the rotating shaft.
[0006]
For example, in a production line or the like, the work in one process is a work of a fixed part, and can be set in a state where the socket and the rotary shaft are bent at a predetermined angle in advance, or the socket and the rotary shaft. It may be better to use a tightening tool that does not wobble.
[0007]
Therefore, by pushing the tip of the rotating shaft with a spring through the slide piece, the socket is prevented from shaking before being fitted to a rotating object such as a bolt.
The tip of the rotating shaft is tapered, the surface of the slide piece is inclined, and the tapered surface is applied to the inclined surface, so that the socket is bent with respect to the rotating shaft in the initial state before being fitted to the rotating object.
[0008]
At this time, the tip of the rotating shaft is a tapered surface having an angle of θ1 with respect to the surface orthogonal to the rotating shaft, and the surface on the slide piece side in contact with the tapered surface is θ2 with respect to the surface orthogonal to the socket axis. By using an inclined surface having an angle of?, Vibration generated between the slide piece and the rotating shaft is suppressed.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a side view of a tightening tool according to the present invention.
The tightening tool 10 includes a universal socket unit 30 (hereinafter abbreviated as “socket unit 30”) to be fitted to a bolt 11 as an object to be rotated, and rotating means 20 for rotating the socket unit 30. .
[0010]
The rotating means 20 includes a chuck portion 22 rotatably attached to the housing 21 for attaching the socket unit 30, a drive motor 23 for rotating the chuck portion 22, an encoder 24 attached to the drive motor 23, and the encoder. As a switch for controlling the drive motor 23 with the information 24, a battery 26 for supplying power to the control unit 25 and the drive motor 23, and a switch for turning on / off the power of the drive motor 23 by being attached to the housing 21. A power switch 27, a forward / reverse mode switch 28 for determining the direction of forward / reverse rotation of the drive motor 23 by being attached to the housing 21, and an origin adjustment mode switch 29 for aligning the origin of the socket unit 30 by being attached to the housing 21. Consists of.
[0011]
In addition, 12 is the workpiece | work which fastens the volt | bolt 11, 21a is the point formed in the housing, 22a is the point formed in the chuck | zipper part.
[0012]
As the drive motor 23, an electric motor, an air motor, a hydraulic motor or the like can be used, and an electric motor is preferable.
The encoder 24 is a detector connected to the rotary shaft 34 via the chuck portion 22 and the drive motor 23 in order to detect the phase of the rotary shaft 34 of the socket unit 30.
When the power switch 27 is pressed with the information from the encoder 24, the control unit 25 returns the rotating shaft 34 to a predetermined phase and stops it, and presses the power switch 27 again to maintain the continuous rotation of the rotating shaft 34. Circuit.
The origin adjustment mode switch 29 is a switch for setting two modes, a mode for origin adjustment and a mode for canceling origin adjustment.
[0013]
FIG. 2 is a view taken in the direction of the arrow 2 in FIG. 1. The tightening tool 10 is configured such that, for example, when the socket unit 30 (socket 31) stops at the phase indicated by the two-dot chain line after bolt tightening, 1), the rotating shaft 34 and the socket 31 are rotated to return to a predetermined phase, that is, the origin position as shown by the arrow a, and when the power switch 27 is pressed again, the forward / reverse mode switch 28 (see FIG. 1). Depending on the setting, it indicates that the forward rotation as indicated by the arrow b or the reverse rotation as indicated by the arrow c.
Further, as will be described later, the tightening tool 10 is also a tool in which the socket 31 is self-supporting with a predetermined bending with respect to the rotating shaft 34 which is a component of the socket unit 30.
[0014]
FIG. 3 is an exploded perspective view of the socket unit of the tightening tool according to the present invention. The socket unit 30 includes a socket 31 fitted to the bolt 11 (see FIG. 1), a spring 32 accommodated in the socket 31, A slide piece 33 urged by the spring 32, a rotary shaft 34 applied to the slide piece 33, a cross pin 35 for attaching the rotary shaft 34 to the socket 41, and a socket 31 for stopping the cross pin 35 from being removed. And a stop ring 36. The spring 32 is a compression spring that biases between the socket 41 and the slide piece 33. 31 a is a point of the socket 31, 36 a and 36 a are guide portions of the retaining ring 36, and 36 b is a hook portion when the retaining ring 36 is removed from the socket 31.
[0015]
4 is a cross-sectional view taken along line 4-4 of FIG.
The socket 31 is formed with a bolt fitting portion 42 on one end side of the main body portion 41, a partition wall 43 is formed in the middle of the main body portion 41, and a spring support portion 44 is formed on the partition wall 43. A slide groove 45 for sliding the slide piece 33 is formed on the other end side (... indicates a plurality. The same applies hereinafter), and the cross pin 35 (see FIG. 3) is passed through the other end side of the main body 41. Pin holes 46 and 46 (the front 46 is not shown) to be formed, a recess 47 for positioning the retaining ring 36 is formed, and a magnet 48 for attracting the bolt 11 (see FIG. 1) is attached to the bolt fitting portion 42 It is a thing.
[0016]
FIG. 5 is a cross-sectional view taken along line 5-5 of FIG.
The socket 31 is provided with four slide grooves 44... And has two pin holes 46 and 46 formed therein. Also, since the slide piece 33 is slid by the four slide grooves 44..., The slide piece 33 does not rotate in the socket 31. Since the cross pin 35 is passed through the two pin holes 46 and 46 and the retaining ring 36 is attached to the recess 47, the cross pin 35 does not come off after the attachment.
[0017]
FIG. 6 is a cross-sectional view taken along line 6-6 of FIG.
The slide piece 33 is slid on an inclined surface 37 inclined by θ2 with respect to a surface orthogonal to the axis C1 of the socket 31 (see FIG. 2), and a slide groove 45 (see FIG. 5) of the socket 41. Projections 38 are formed.
[0018]
FIG. 7 is a side view of the rotating shaft of the tightening tool according to the present invention, and the rotating shaft 34 is formed with a tapered surface 51 inclined at an angle of θ1 with respect to the surface perpendicular to the axis C2 at one end. A zigzag hole 52 is formed in the vicinity of one end of the cross pin 35 (see FIG. 3) to be fitted to the cross pin 35 (see FIG. 3), and an attachment portion 53 to be attached to the rotating means 20 (see FIG. 1) is formed at the other end.
That is, the socket 31 (see FIG. 3) is bent at an angle of θ1 + θ2 with respect to the rotating shaft.
[0019]
FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 7 and shows the shape of the zigzag hole 52 of the rotating shaft 34. The zigzag hole 52 is formed on the rotating shaft 34 and the socket 31 is zigzag. This indicates that the mounting structure can swing in the range of the angle A with respect to the rotating shaft 34, that is, can swing as shown by an arrow B.
[0020]
FIG. 9 is a side cross-sectional view of the tightening tool according to the present invention. The tightening tool 10 attaches the socket 31 to the tip of the rotating shaft 34 via a cross pin 35 so as to be swingable (swingable), A spring 32 and a slide piece 33 are built in the socket 31, and the socket 31 is shaken before being fitted to the bolt 11 (see FIG. 1) by pushing the tip of the rotary shaft 34 through the slide piece 33 with the spring 32. The tip of the rotating shaft 34 is a tapered surface 51 inclined at an angle θ1 (see FIG. 7) with respect to a surface orthogonal to the rotating shaft 34 (axis C2), and the slide piece 33 in contact with the tapered surface 51 By setting the side surface to an inclined surface 37 that is inclined at an angle θ 2 (see FIG. 7) with respect to the surface orthogonal to the axis C 1 of the socket 31, the rotating shaft is in the initial state before being fitted to the bolt 11. 34 Is bent at an angle of socket 31 .theta.1 + .theta.2 (see FIG. 7), said to be a tool for tightening with a rotating means 20 for rotating shaft 34 to rotate the socket 31.
[0021]
For example, in a production line or the like, the work in one process is a work of a fixed part, and can be set in a state where the socket and the rotary shaft are bent at a predetermined angle in advance, or the socket and the rotary shaft. It may be better to use a tightening tool that does not wobble.
[0022]
Therefore, by pushing the tip of the rotating shaft 34 with the spring 32 through the slide piece 33, the socket 31 is prevented from shaking before being fitted to the bolt 11. As a result, it is possible to shorten the work time of the bolt tightening work and to reduce the assembly cost.
[0023]
The tip of the rotating shaft 34 is a tapered surface 51, the surface of the slide piece 33 is an inclined surface 37, and the tapered surface 51 is applied to the inclined surface 37, so that the rotating shaft 34 is in an initial state before being fitted to a bolt. In contrast, the socket 31 is bent. As a result, it is possible to improve the workability of the bolting operation and improve the manufacturing quality.
[0024]
Further, the tip of the rotating shaft 34 is a tapered surface 51 having an angle θ1 with respect to the surface orthogonal to the rotating shaft 34, and the surface on the slide piece 33 side in contact with the tapered surface 51 is orthogonal to the axis C 1 of the socket 31. Since the inclined surface 37 has an angle θ2 with respect to the surface, vibration generated between the slide piece 33 and the rotating shaft 34 can be suppressed.
[0025]
Next, the operation of the tightening tool 10 described above will be described. First, the movement of the tightening tool 10 will be described.
FIGS. 10A to 10C are explanatory views showing the movement of the tightening tool according to the present invention. In (a), the socket 31 bent and attached to the rotating shaft 34 at an angle of θ1 + θ2 is fitted to the bolt 11 which is the object to be rotated as indicated by an arrow a.
Since the tip of the rotating shaft 34 is pushed by the spring 32 through the slide piece 33, the socket 31 does not shake before being fitted to the bolt 11.
In (b), by rotating the rotating shaft 34 by 90 °, the socket 31 is rotated by 90 °, and the bolt 11 is rotated by 90 °. During the tightening operation of the bolt 11 (when the rotating shaft 34 is rotated), it is indicated that a slight deflection of the rotating shaft 34 can be allowed as indicated by an arrow b.
In (c), the rotating shaft 34 is rotated 180 °, whereby the socket 31 is rotated 180 ° and the bolt 11 is rotated 180 °. During the tightening operation of the bolt 11 (when the rotary shaft 34 is rotated), the slide piece 33 repeats reciprocating movement as indicated by an arrow c.
[0026]
Next, the function of the rotating means 20 will be described.
FIG. 11 is a block diagram of the rotating means of the tightening tool according to the present invention. The rotating means 20 includes a drive motor 23 for driving the rotating shaft 34, a power switch 27 for turning on / off the drive motor 23, In order to detect the phase of the rotating shaft 34, the encoder 24 connected to the rotating shaft 34, and when the power switch 27 is pressed with information from the encoder 24, the rotating shaft 34 is returned to a predetermined phase and stopped. It can be said that the control unit 25 is configured to maintain the continuous rotation of the rotary shaft 34 by pressing 27 again.
[0027]
As an example of work, first, the direction of rotation of the rotary shaft 34 is set by the forward / reverse mode switch 28. By setting the forward / reverse mode switch 28 to the a and b contact sides, the forward rotation mode is set. Next, the origin alignment mode switch 29 is set to the a and b contact sides to set the origin alignment mode. Then, when the power switch 27 is pressed, the rotary shaft 34 is rotated, and the socket 31 where the point 31a of the socket 31 is stopped at the position indicated by the black circle is rotated as indicated by the arrow d, and the rotary shaft is indicated at the position indicated by the white circle. The rotation of 34 is stopped, and the point 31a of the socket 31 coincides with the point 21a on the housing 21 side. That is, when the power switch 27 is pressed, the rotary shaft 34 is returned to a predetermined phase and stopped.
[0028]
For example, in a production line or the like, it may be easier to fit a rotating object such as the bolt 11 when the initial phase of the socket 31 and the rotating shaft 34 is determined, and when the socket 31 is fitted to the bolt 11. It is intended to improve the workability.
[0029]
Further, the socket is set on the bolt (see FIG. 1), and the power switch 27 is pushed again to maintain the continuous rotation of the rotary shaft 34, and the bolt 11 is tightened.
[0030]
That is, in the tightening tool 10 (see FIG. 1), the rotating means 20 includes the drive motor 23, the power switch 27, the encoder 24, and the control unit 25. The phase is returned to a predetermined phase and stopped, and when the power switch 27 is pressed again, the continuous rotation of the rotary shaft 34 is maintained. As a result, the workability of the bolting operation can be improved.
[0031]
A method for replacing the socket 31 or the rotating shaft 34 will be described.
12A to 12D are first operation explanatory views of the tightening tool according to the present invention.
In (a), the fastening tool 10 with the socket 31 already set on the rotating shaft 34 is shown.
In (b), the retaining ring 36 is removed from the socket 31 as shown by the arrow (1).
In (c), the cross pin 35 is removed from the socket 31 as shown by the arrow (2).
In (d), the slide piece 33 and the rotating shaft 34 are removed from the socket 31 as shown by the arrow (3).
[0032]
FIGS. 13A to 13C are second operation explanatory views of the tightening tool according to the present invention.
In (a), a new slide piece 63 in which the angle θ1 of the inclined surface 37 of the slide piece 33 indicated by the two-dot chain line is set small, and a new angle θ2 of the taper surface of the rotating shaft 34 shown in the two-dot chain line are set small. A rotating shaft 64 is prepared.
[0033]
In (b), a new slide piece 63 and a rotating shaft 64 are attached to the socket 31. It shows that the angle of the new rotating shaft 64 with respect to the socket 31 is set to be smaller by the angle D than when the slide piece 33 and the rotating shaft 34 shown in FIG. That is, by setting the angle θ1 of the inclined surface 37 and the angle θ2 of the tapered surface 51 of the rotating shaft 34 to arbitrary angles, the angle of the new rotating shaft with respect to the socket 31 can be arbitrarily set within a predetermined range. it can.
[0034]
In (c), in order to tighten the bolts having different sizes, the slide piece 33 and the bolt fitting portion 42 shown in (a) are replaced with sockets 61 having different sizes. That is, it is possible to cope with tightening bolts of different sizes.
[0035]
In the embodiment, as shown in the figure, a socket for bolt tightening is attached to the rotary shaft, but the present invention is not limited to this, and the socket is a chuck for attaching a tool such as a driver bit, a drill, a reamer or a grindstone. May be.
Further, in the embodiment, as shown in FIG. 7, the taper surface 51 of the rotating shaft 34 is set to an angle θ1, and the inclined surface 37 of the slide piece 33 is set to an angle θ2, but these angles θ1 and θ2 are θ1. 0 and θ2 may be set to a finite angle, and θ2 may be set to 0 and θ1 to a finite angle.
[0036]
【The invention's effect】
The present invention exhibits the following effects by the above configuration.
Since the socket is swingably attached to the tip of the rotating shaft via the cross pin, the spring and the slide piece are built in the socket, and the tip of the rotating shaft is pushed by the spring through the slide piece. It is possible to prevent the socket from shaking before being fitted to a rotating object such as a bolt. As a result, it is possible to shorten the work time of the bolt tightening work and to reduce the assembly cost. In addition, since the tip of the rotating shaft is a tapered surface, the surface of the slide piece is an inclined surface, and the tapered surface is applied to the inclined surface, the socket is bent with respect to the rotating shaft in the initial state before fitting to the bolt. Can be made. As a result, it is possible to improve the workability of the bolting operation and improve the manufacturing quality. Furthermore, the tip of the rotating shaft is a tapered surface having an angle of θ1 with respect to the surface orthogonal to the rotating shaft, and the surface on the slide piece side in contact with the tapered surface is at an angle of θ2 with respect to the surface orthogonal to the socket axis Because of the inclined surface having, vibration generated between the slide piece and the rotating shaft can be suppressed.
[Brief description of the drawings]
FIG. 1 is a side view of a tightening tool according to the present invention. FIG. 2 is a view taken in the direction of arrow 2 in FIG. 1. FIG. 3 is an exploded perspective view of a socket unit of the tightening tool according to the present invention. 4 is a sectional view taken along line 4-4 in FIG. 3. FIG. 5 is a sectional view taken along line 5-5 in FIG. 3. FIG. 6 is a sectional view taken along line 6-6 in FIG. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 7. FIG. 9 is a side cross-sectional view of the tightening tool according to the present invention. FIG. 10 shows the movement of the tightening tool according to the present invention. FIG. 11 is a block diagram of the rotating means of the tightening tool according to the present invention. FIG. 12 is a first action explanatory view of the tightening tool according to the present invention. FIG. 13 is a tightening tool according to the present invention. 2nd action explanation diagram [Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Tightening tool, 11 ... Rotation object (bolt), 20 ... Rotating means, 23 ... Drive motor, 24 ... Encoder, 25 ... Control part, 27 ... Switch (power switch), 31 ... Socket, 32 ... Spring , 33 ... slide piece, 34 ... rotating shaft, 35 ... cross pin, 37 ... inclined surface, 51 ... tapered surface, C1 ... socket axis.

Claims (1)

A socket is swingably attached to the tip of the rotating shaft via a cross pin, and a spring and a slide piece are built in the socket, and the tip of the rotating shaft is pushed by the spring through the slide piece to fit on a rotating object such as a bolt. It is a tightening tool with a structure that prevents the wobbling of the socket before mating,
The tip of the rotating shaft is a tapered surface having an angle of θ1 with respect to the surface orthogonal to the rotating shaft, and the surface on the slide piece side in contact with the tapered surface has an angle of θ2 with respect to the surface orthogonal to the socket axis. The tightening tool is characterized in that the socket is bent at an angle of θ1 + θ2 with respect to the rotating shaft in an initial state before being fitted to the rotating object by using the inclined surface.

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