JPS6072622A - Automatic caulking device - Google Patents

Abstract

PURPOSE:To caulk securely a nut tightened via a washer by juxtaposing caulking heads having differently shaped caulking pawls and selecting the caulking heads according to the condition how the washer is attached to a work. CONSTITUTION:Caulking heads having differently shaped caulking pawls are vertically movably juxtaposed to an attaching base provided movably in X-, Y- directions. If the circumferential edge part 5a of a washer 5 projects from a work 1, the socket 33 of the 1st caulking head is engaged with a nut 6 and after a caulking head 50 is turned integrally with the socket 33, the part 5a is bent upward by a detaining surface 51 and is pressed to one side face of the nut 6. If the bottom surface of the washer 5 contacts tightly with the work 1, the knife edge 55 of a caulking pawl 54 is inserted by the 2nd caulking head to the bottom surface of the washer 5 to bend the part 5a. The nut tightened via the washer is thus securely caulked.

Description

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

[Technical background of the invention and its problems]

In the assembly process of an automobile engine, as shown in FIG. 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 Figure 1, the peripheral edge 5a of the washer 5 protrudes from the workpiece 1, and as shown in Figure 2 VC, the peripheral edge 5a of the washer 5 protrudes from the workpiece 1.
There are cases where a does not protrude from the work 1. Therefore, if the peripheral edge 5a of the washer 5 is protruding, the peripheral edge 5a can be held up 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 held up. It is necessary to pry it out using a tool such as a flat head screwdriver or chisel.

Therefore, in both cases, manual caulking work by the operator is required, which requires more man-hours for assembly, and the washer 5
Bending the nut 6 at a right angle along the side surface was an inner hole, and the caulking strength was insufficient.

[Purpose of the invention]

This invention was made in view of the above-mentioned circumstances, and its purpose is to automatically and firmly swage a nut tightened by -C through a washer, and to swage the periphery of the washer to the workpiece. The object of the present invention is to provide an automatic latching device that can be easily raised and crimped even when the clasp is in close contact with the clasp.

[Summary of the invention]

This invention provides a first head mount having a different shape of caulking claw on the head mounting base. A second caulking head is installed in parallel, and the first caulking head is installed in parallel according to the attachment state of the washer to the workpiece. Next, there is an automatic crimping device in which a second crimping head can be selected and a single crimping device can crimp the washer regardless of whether or not the peripheral edge of the washer protrudes.

[Embodiments of the invention]

Hereinafter, this invention will be explained based on the drawings.

Reference numeral 11 in FIGS. 3 and 4 is a workpiece holding table, and a workpiece clamp 12 is provided on the upper surface of this table. 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 this work holding base 11, and a Y table 14 is provided on the upper surface of this base 13.
An XY table mechanism 16 consisting of an X table 15 and an X table 15 is provided. The Y-table 14 is connected to the Y-axis motor 1.
7. The X table 15 is driven by the X axis motor 18. Head mounting bases 19.19 are mounted on this X-table 15, and the first caulking head 2 and the first caulking head 2 and 2 caulking head 2
2 is provided. The vertical movement mechanism 2θ, 20 is AC
A screw shaft 24 rotated by a motor 23 and this screw shaft 2
4 and a guide mechanism 26 that guides the moving member 25 in a vertically slidable manner. The force-aided mechanism 26 is connected to the above-mentioned first. Second caulking head 21.2
2 is provided.

Next, the first caulking head 2 will be explained based on FIGS. 5 to 7. 28 is a mounting base, and a cylindrical guide tube 29 is vertically attached to this mounting base 28. This guide tube 29 has a stopper 30a.
A main shaft 30 whose rotational range is restricted is rotatably inserted, and its upper end is connected to a rotary actuator 32 via a coupling 31. Also, the lower r of the main shaft 30, ? A socket 33 is removably connected to the portion. As shown in FIG. 8, this socket 33 has a cap nut shape whose lower end engages with the nut 6, and a retaining portion 35 having an opening 34 is provided on the lower side thereof. Furthermore, the guide tube 29 is connected to a bearing body 36.
The fixed base 37 has a plurality of guide rods 3B, , 9B, which are rotatably supported on the fixed base 37 with a compliance of 4 (4).
are vertically installed and these guide rods 38
,．． 9/l supports the coupling 3) via sliders 39 and 39. These guide rods,
? 8, ,? A mounting member 40 is installed at the upper end of the mounting member 8 (V), and a pushing cylinder 41 is attached to the upper part of the mounting member 40. The piston 42 of this pusher I cylinder 41 penetrates the mounting member 40 and protrudes downward, and is connected to the rotary actuator 32.
The structure is such that the socket 33 can be pressed against the washer 5 via the main shaft 30 by pressing the socket 33 downward.

Further, a guide tube 2 protruding downward from the mounting base 28 is provided.
A rotary lever 44 is pivotally attached to 9 via a pivot 43. A pedestal 45 is protruded from one end of the rotary lever 44, and a suppression cylinder 46 provided on the mounting pedestal 28 faces the pedestal 45. This suppression cylinder 46 is provided with a piston 47.
The rotary lever 44 is rotated via the cradle 45. Further, a return spring 48 is stretched between the rotating lever 44 and the mounting base 28, and the rotating lever 44 is held in a horizontal state. Furthermore, this rotary lever 44 is connected to a caulking pawl 5 via a bracket 49.
0 is attached. The caulking pawl 50 is formed with a locking surface 51 consisting of an uneven surface for locking the caulking pawl 50 in opposition to the opening 34 of the socket 33 .

Furthermore, as shown in FIGS. 9 and 10, the second caulking head 22 basically has the same structure as the first caulking head 21, so the same numbers will be used for the same configuration i. 111d, only the different parts will be explained. That is, a bracket 53 is provided on the rotary lever 44 via a pawl moving cylinder 52, and a caulking pawl 54 is attached to this bracket 53. This caulking pawl 54 faces the opening 34 of the socket 33,
At its lower end, a knife 5 is inserted between the work l and the washer 5 to raise the washer 50 peripheral edge j''1115a.
5 is formed.

The first . Second caulking head 21.
22 is the workpiece clamp 0 due to the movement of the X table 15.
It is possible to selectively face the workpiece 1 supported by the workpiece 12.

Next, self! configured as described above! The operation of the single thread crimping device will be explained based on FIG. 11.

As shown in FIG.
is protruding from work 1, X table 15
The front and back direction in which the first caulking head 2 is moved to face the workpiece 1 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 caulking 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 the guide mechanism 2
6, and the entire caulking head 21 of the whistle l descends. Then, when the first crimping head 21 descends to a predetermined position, the socket 33 engages with the nut 6, but since the nut 6 is a hexagonal nut and the retaining part 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 upper surface of the nut 6 and will be in an unengaged state.

Therefore, the rotary actuator 32 operates, and the main shaft 30
When the socket 33 rotates, the socket 33 also rotates integrally. Therefore, when the position of the socket 33 matches the nut 6, the engaging portion 35 of the socket 33 engages with the nut 6,
The lower end of the retaining portion 35 contacts the upper surface of the washer 5. At this time, since the opening 34 is provided in a part of the retaining part 35, a part of the nut 6 is exposed, and the caulking claw 50 faces this exposed part. In this state, when the pressing cylinder 41 is activated, the piston 42 protrudes and presses the rotary actuator 32 downward. This pressing force t2
The force is transmitted to the L main body 31° socket 33, and the engaging portion 35 of the socket 33 presses the washer 5 downward. Next, when the suppression cylinder 46 is activated, the piston 4
7 presses the pedestal 45 downward.

Therefore, the rotating lever 44 rotates around the pivot pin 43 as a fulcrum, and the caulking pawl 50 also rotates together. and,
When the locking part 51 of the caulking pawl 50 comes into contact with the peripheral edge part 5a of the washer 50 and the rotation lever 44 further rotates, the peripheral part 5a of the washer 5 moves upward about the corner of the nut 6 as a fulcrum. It is bent to On the other hand, at this time, the vertical motor fh12o
Since the entire first caulking head 21 is simultaneously raised by the AC motor 23, a portion of the washer 5 is pulled up while being engaged with the locking portion 5 of the caulking pawl 50. Therefore, a portion of the washer 5 is bent at a right angle 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 2 is raised, the pressing cylinder 41 is activated and the piston 42 presses the low reactor 32 downward, so that the socket 33 is pressed against the rest of the washer 5. Even if the parts are pressed together, the parts other than the bent part 5b will not be lifted up.

When the washer 5 is bent and the nut 6 is crimped, the piston 47 of the pressing cylinder 46 rises, and the rotary lever 44 is returned to the horizontal state by the return spring 48. Then, the entire first caulking head 21 is raised by the vertical movement 411420, and the sockets 331-J,
Separate from nut 6.

Furthermore, when the work 1 is in close contact with the work 1 as shown in FIG. Opposed to work 1. Second caulking head 2
Since the operation of the head 20 is basically the same as that of the first crimping head 21, only the different parts will be explained based on FIG. First, the rotation lever 4 is moved by the pressing cylinder 46.
4 rotates j1, the caulking pawl 54 also rotates integrally. Therefore, the knife 55 of the caulking pawl 54 approaches the washer 5 while drawing a circular arc, slides on the upper surface of the workpiece 1, and rips the washer 5 from the periphery 5a of the washer 5.
Insert it into the bottom surface of layer 5. Therefore, the peripheral edge 5a of the washer 5 is bent upward as a full fulcrum of the corner flrVr of the nut 6, and the knife 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 portion of the washer 5 is pulled up while being engaged with the knife 55 of the crimping pawl 54. Therefore, a portion of the washer 5 is bent at a right angle 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.

In this way, the first. By providing different crimping claws 50 and 54 on the second crimping heads 21 and 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 first and second caulking heads having caulking claws of different shapes are arranged side by side on the head mounting base, and the first and second caulking heads having the caulking claws of different shapes are arranged in parallel on the head mounting base, and the first and second caulking heads are arranged in parallel on the head mounting base, and the first and second caulking heads have different shapes. A second caulking head can be selected,
This has the effect that a single crimping device can firmly crimp the washer regardless of whether or not the peripheral edge of the washer protrudes.

[Brief explanation of the drawing]

1 and 2 are first analysis views showing workpieces with different mounting states of washers, FIG. 3 is a front view showing one embodiment of the caulking device of the present invention, FIG. 4 is also a side view, and FIG. The figures are a front view of the first caulking head, FIG. 6 is a top view, FIG. 7 is a vertical sectional view, FIG. 8 is an enlarged sectional view of a part of the socket, and FIG. Figure t” once
FIG. 10 is a front view of the second crimping head, and FIG. 10 is a side view, and FIGS. 1...Work, 2...Ball shaft, 5...Washer, 6
...Nut, 11...Work holding stand, 19...Head mounting stand, 20...Vertical #J mechanism, 21...Clinching head of bow 111, 22...Second caulking head, 50°54 ...Caulking claw, 29...Guide tube. Figure 11 Figure 12

Claims (1)

[Claims] A nut is tightened through a washer to a main shaft that is pivotally supported by a workpiece, and then a part of the washer is bent along the side of the nut to fix it by caulking. , a base provided on one side of this work holding table, a head mount provided on the base so as to be movable in the X and Y directions, and a head mount provided on the head mount so as to be movable up and down via a vertical movement mechanism. X on the head mount
The first one can selectively face the workpiece by moving in the Y direction. a second caulking head; and this first caulking head. An automatic crimping device characterized in that the second crimping head is provided with crimping claws of different shapes for bending the washer.