JPS6411370B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an automatic locking device that crimps a nut for fixing a clutch plate to a main shaft of an engine or the like to prevent the nut from loosening.

[Technical background of the invention and its problems]

In the assembly process of an automobile engine, as shown in Fig. 1, when a clutch plate or the like is fitted to the main shaft 2 which is pivotally supported on the workpiece 1 and the clutch plate or the like is fixed to the main shaft 2, the main shaft 2 must be fixed. It is fixed by tightening a nut 6 to the threaded portion 4 via a washer 5. However, since an automobile engine generates vibrations during operation, the nut 6 is likely to loosen due to the vibrations. Therefore, after tightening the nut 6, the washer 5 is bent and caulked along the side surface of the nut 6 to prevent the nut 6 from loosening.

However, depending on the engine model, as shown in FIG. 1, the peripheral edge 5a of the washer 5 may protrude from the work 1, or as shown in FIG. There are cases where it is not prominent. Therefore, if the peripheral edge 5a of the washer 5 is protruding, it can be raised by pinching the peripheral edge 5a with a tool such as pliers, but if the peripheral edge 5a of the washer 5 is not protruding, the peripheral edge 5a can be raised. cannot be pinched, and it is necessary to pry it up using a tool such as a flathead screwdriver or chisel.

Therefore, in both cases, manual caulking work by the worker is required, which requires a lot of assembly man-hours, and it is difficult to bend the washer 5 at right angles along the side surface of the nut 6, resulting in insufficient caulking strength. It was hot.

[Purpose of the invention]

This invention was made in view of the above-mentioned circumstances, and its purpose is to automatically and firmly caulk a nut tightened through a washer, and to ensure that the periphery of the washer does not touch the workpiece. The purpose of the present invention is to provide an automatic crimping device that can be easily raised and crimped even if the objects are in close contact with each other.

[Summary of the invention]

When the shape of the caulked parts is a mixture of a first caulked part in which the peripheral edge of the washer protrudes from the workpiece and a second caulked part in which the peripheral edge of the washer does not protrude from the workpiece. , a workpiece holding table that holds these parts to be caulked with different shapes side by side in a horizontal plane so that their main axes are perpendicular; a head mount that is movable in the direction in which the caulked parts are arranged side by side; and the head mount is arranged in parallel along the direction in which the caulked parts are arranged side by side, and is opposed to the upper part of the first and second caulked parts. and first and second caulking heads that are vertically movable via a vertical movement mechanism, and the first caulking head has a latching surface for latching onto the peripheral edge of the washer of the first caulking part. A first caulking pawl is provided on the second caulking head, and the second caulking head is provided with a first caulking pawl that raises the peripheral edge of the washer and bends it along the side surface of the nut as it rotates.
A second crimping pawl is provided, which has a knife edge inserted between the workpiece of the caulked part and the washer, and which raises the peripheral edge of the washer as it rotates and bends it along the side surface of the nut. , even if the shapes of the parts to be crimped are different, the first crimping head and the second crimping head
The reason is that the caulking heads can be selectively opposed and caulked.

[Embodiments of the invention] Hereinafter, this invention will be explained based on the drawings.

11 in Fig. 3 and Fig. 4 is a work holding table;
A work clamp 12 is provided on this upper surface. That is, the work holding table 11 is
When a first caulked component whose peripheral edge 5a of the washer 5 protrudes from the work 1 and a second caulked component whose peripheral edge 5a of the washer 5 does not protrude from the work 1 coexist, these forms It is designed to hold different types of caulked parts. This work clamp 12 rotatably holds the work 1 shown in FIGS. 1 and 2, and is set with its main shaft 2 vertically and with a nut 6 tightened through a washer 5 at the top. Ru. A base 13 is installed at the rear of the workpiece holding table 11, and an XY table mechanism 16 consisting of a Y table 14 and an X table 15 is provided on the upper surface of the base 13. The Y table 14 is driven by a Y-axis motor 17, and the X-table 15 is driven by an X-axis motor 18. Head mounts 19, 19 are mounted on this X-table 15, and a first crimping head 21 and a second swaging head 21 are mounted on the front portions of these head mounts 19, 19 via vertical movement mechanisms 20, 20, respectively. A caulking head 22 is provided. The vertical movement mechanisms 20, 20 are composed of a screw shaft 24 rotated by an AC motor 23, a moving member 25 screwed onto the screw shaft 24, and a guide mechanism 26 that guides the moving member 25 slidably in the vertical direction. It is configured. The guide mechanism 26 is provided with the first and second caulking heads 21, 21 via a mounting plate 27.

Next, the fifth caulking head 21 is
This will be explained based on FIGS. 7 to 7. 28 is a mounting base, and this mounting base 28 has a cylindrical guide tube 2.
9 is installed vertically. A main shaft 30 whose rotation range is restricted by a stopper 30a is rotatably inserted into the guide cylinder 29, and its upper end is connected to a rotary actuator 32 via a coupling ring 31. Also,
A socket 33 is detachably connected to the lower end of the main shaft 30. As shown in FIG. 8, this socket 33 has a cap nut shape whose lower end engages with the nut 6, and an opening 34 on one side thereof.
An engaging portion 35 is provided. moreover,
The guide tube 29 is connected to the fixed base 3 via the bearing body 36.
7 is rotatably supported and has a large compliance configuration. Further, a plurality of guide rods 38, 38 are vertically provided on the fixed base 37, and these guide rods 38, 38 are connected to the coupling 31 via sliders 39, 39.
is supported. These guide rods 38,3
A mounting member 40 is installed on the upper end of the mounting member 8, and a pressing cylinder 4 is mounted on the upper part of the mounting member 40.
1 is installed. The piston 42 of this pressing cylinder 41 penetrates the mounting member 40 and protrudes downward, and is connected to the rotary actuator 3.
2 downward and insert the socket 3 through the main shaft 30.
3 can be pressed against the washer 5.

Furthermore, a rotating lever 44 is pivotally attached to the guide tube 29 that projects downward from the mounting base 28 via a pivot pin 43. A cradle 45 is protruded from one end of the rotary lever 44, and a pressing cylinder 46 provided on the mount 28 is attached to the cradle 45.
are facing each other. This pressing cylinder 46 is provided with a piston 47, and this piston 47 is adapted to rotate the rotating lever 44 via the pedestal 45. In addition, the rotation lever 44 and the mounting base 28
A return spring 48 is stretched between the rotary lever 44 and the rotating lever 44 in a horizontal state. Further, a caulking pawl 50 is attached to the rotating lever 44 via a bracket 49.
This caulking claw 50 is attached to the opening 3 of the socket 33.
4, and a locking surface 51 made of unevenness for locking to the peripheral edge 5a of the washer 5 is formed on the opposing surface.

Furthermore, as shown in FIGS. 9 and 10, the second crimping head 22 has basically the same structure as the first crimping head 21, so the same components are given the same numbers and their explanations will be omitted. , only the different parts will be explained. That is, the rotation lever 44
The bracket 5 is connected to the bracket 5 via a claw moving cylinder 52.
3, and a caulking pawl 54 is attached to this bracket 53. This caulking pawl 54 faces the opening 34 of the socket 33, and at its lower end there is a knife edge 55 that is inserted between the workpiece 1 and the washer 5 to raise the peripheral edge 5a of the washer 5.
is formed.

The first and second caulking heads 21 and 22 configured in this manner can selectively face the work 1 supported by the work clamp 12 by moving the X table 15.

Next, the operation of the automatic locking device constructed as described above will be explained based on FIG. 11. When the workpiece 1 held by the workpiece clamp 12 of the workpiece holding table 11 has the peripheral edge 5a of the washer 5 protruding from the workpiece 1 as shown in FIG.
The X-table 15 is moved so that the first caulking head 21 faces the workpiece 1. The longitudinal direction is adjusted by the Y table 14, and the socket 33 is made to face the nut 6 of the workpiece 1. When the first crimping head 21 is positioned, the AC motor 23 is activated and the screw shaft 24 is rotated. Therefore, the moving member 25 screwed onto the screw shaft 24 is connected to the guide mechanism 2.
6, the entire first crimping head 21 descends. Then, when the first caulking head 21 descends to a predetermined position, the socket 3
3 engages with the nut 6, but since the nut 6 is a hexagonal nut and the engaging portion 35 of the socket 33 also has the same shape, if there is a deviation in the circumferential direction, the socket 33 will come into contact with the top surface of the nut 6. They touch and become unengaged. Therefore, when the rotary actuator 32 operates and the main shaft 30 rotates, the socket 33 also rotates integrally. Therefore, when the socket 33 is aligned with the nut 6, the engaging portion 35 of the socket 33 engages with the nut 6, and the lower end of the engaging portion 35 comes into contact with the upper surface of the washer 5. At this time, since the opening 34 is provided in a portion of the engaging portion 35, a portion of the nut 6 is exposed, and the caulking pawl 50 faces this exposed portion. In this state, when the pressing cylinder 41 is operated, the piston 42
protrudes and presses the rotary actuator 32 downward. This pressing force is transmitted to the main shaft 31 and the socket 33, and the engaging portion 35 of the socket 33 presses the washer 5 downward. Next, when the pressing cylinder 46 operates, the piston 47 presses the pedestal 45 downward. Therefore, the rotating lever 44 rotates about the pivot pin 43, and the caulking pawl 50 also rotates together. And caulking nail 50
When the locking surface 51 of the washer 5 comes into contact with the peripheral edge 5a of the washer 5 and the rotating lever 44 further rotates, the peripheral edge 5a of the washer 5 is bent upward about the corner of the nut 6 as a fulcrum. On the other hand, at this time, since the entire first caulking head 21 is simultaneously raised by the AC motor 23 of the vertical movement mechanism 20, the washer 5
A part of the crimping claw 50 is pulled up while being engaged with the engagement surface 51 of the caulking claw 50. Therefore, a part of the washer 5 is bent at right angles along one side of the nut 6, and the bent portion 5b is pressed against one side of the nut 6. As a result, the nut 6 is prevented from rotating, that is, it is caulked by a portion of the washer 5. Note that even when the entire first caulking head 21 rises, the pressing cylinder 41 operates and the piston 42 presses the rotary actuator 32 downward, so that the socket 33 holds the remaining part of the washer 5. The parts other than the bent part 5b are not lifted up.

When the washer 5 is bent and the nut 6 is tightened, the piston 47 of the pressure cylinder 46 rises, and the rotation lever 44 is moved by the return spring 48.
It returns to the horizontal state by Then, the entire first caulking head 21 is raised by the vertical movement mechanism 20, and the socket 33 is separated from the nut 6.

Further, as the work 1 is shown in FIG.
If the workpiece 1 does not protrude, the X table 15 moves and the second caulking head 22 faces the workpiece 1. Since the function of the second crimping head 22 is basically the same as that of the first crimping head 21, only the different parts will be explained based on FIG. First, when the rotation lever 44 is rotated by the pressing cylinder 46, the caulking pawl 54 is also rotated integrally. Therefore, the knife edge 55 of the caulking pawl 54 approaches the washer 5 while drawing an arc, and is inserted into the lower surface of the washer 5 from the peripheral edge 5a of the washer 5 while sliding on the upper surface of the workpiece 1. Therefore, the peripheral edge 5a of the washer 5 is bent upward using the corner of the nut 6 as a fulcrum, and the knife edge 55
is deeply inserted into the lower surface of the washer 5. On the other hand, at this time, since the entire second crimping head 22 is simultaneously raised by the vertical movement mechanism 20, a part of the washer 5 is pulled up while being engaged with the knife edge 55 of the crimping pawl 54. Therefore, a part of the washer 5 is bent at right angles along one side of the nut 6, and the bent portion 5b is pressed against one side of the nut 6. This prevents the nut 6 from rotating.
In other words, it is caulked with a part of the washer 5.

In this way, the first and second caulking heads 21,
By providing different crimping pawls 50 and 54 on 22, the crimping head can be selected depending on the mounting state of the washer 5 on the workpiece 1.

〔Effect of the invention〕

As explained above, according to the present invention, the head mounting base has a first caulking pawl of a different shape,
A second caulking head is installed in parallel, and the first and second caulking heads can be selected depending on the attachment condition of the washer to the workpiece, and one caulking device can be used to determine whether or not the peripheral edge of the washer protrudes. This has the effect of being able to be firmly caulked regardless of the situation.

[Brief explanation of the drawing]

1 and 2 are cross-sectional views showing works with different mounting states of washers, FIG. 3 is a front view showing an embodiment of the caulking device of the present invention, FIG. 4 is a side view, and FIG. Similarly, FIG. 6 is a front view of the first caulking head, FIG. 6 is a side view, FIG. 7 is a longitudinal cross-sectional view, FIG. Figure 10 is a front view of the caulking head 2, and Figure 11 is a side view.
A, B, and C in the figure and FIG. 12 are action explanatory diagrams. 1...Workpiece, 2...Spindle, 5...Washer,
6...nut, 11...work holding stand, 19...
Head mounting base, 20... vertical movement mechanism, 21... first caulking head, 22... second caulking head, 50, 54... caulking pawl, 29... guide tube.

Claims (1)

[Claims] 1 After tightening a nut on a main shaft protruding from a workpiece via a washer, the peripheral edge of the washer is bent and caulked along the side surface of the nut.The form of the crimped part is the peripheral edge of the washer. In the case where there is a mixture of a first caulked part whose washer protrudes from the workpiece and a second caulked part whose peripheral edge part does not protrude from the workpiece, these caulked parts with different shapes are A workpiece holding table that holds the workpieces side by side in a horizontal plane so that their main axes are perpendicular to each other, and a head that is installed adjacent to the workpiece holding table and can move forward and backward with respect to the workpiece holding table, and can also move in the direction in which the parts to be caulked are arranged side by side. a mounting base,
First and second parts are arranged on the head mounting base along the direction in which the parts to be caulked are arranged side by side, and are opposed to the upper parts of the first and second parts to be caulked, and are movable up and down via a vertical movement mechanism. a second caulking head, and a retaining surface provided on the first caulking head to engage the peripheral edge of the washer of the first caulked part, and the peripheral edge of the washer is pulled up as the component rotates. a first caulking pawl bent along the side surface of the nut; and a knife edge provided on the second caulking head and inserted between the workpiece of the second caulked part and the washer. An automatic crimping device comprising a second crimping pawl that raises the peripheral edge of the washer and bends it along the side surface of the nut as the washer moves.