JPS583774B2 - Nut manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a nut manufacturing apparatus that includes a synthetic resin stopper ring that presses against the outer peripheral surface of a threaded portion of a bolt.

Generally, this type of nut is used to prevent loosening, but the manufacturing process is such that the locking ring is first pushed into the cylindrical part of the nut by a combination mechanism, and then the cylindrical part is squeezed inward by a crimping mechanism and rotated. Manufactured by fixing a retaining ring to a nut.

However, in conventional nut manufacturing equipment of this type, the combination mechanism and the crimping mechanism are arranged in the horizontal direction, so the nut and the rotation stopper ring are transferred to the combination mechanism and the crimping mechanism by mechanical forced feeding means such as pushers. Not only does this inevitably complicate the structure and make it expensive, but a forced pressing force is applied to the parts, which may deform or damage the parts.

Furthermore, the supply and transfer of parts is carried out intermittently one by one, making it impossible to increase the processing speed.

Furthermore, since the combination mechanism and the crimping mechanism are arranged laterally, the area occupied by the entire device is large and becomes a nuisance.

SUMMARY OF THE INVENTION Therefore, the present invention seeks to provide a nut manufacturing apparatus that solves the above-mentioned drawbacks at once by arranging a combination mechanism and a caulking mechanism one above the other, and transporting parts to each mechanism by gravity falling means. It is something to do.

An embodiment of the present invention will be described below in detail with reference to the drawings.

In the drawings, reference numeral 1 denotes a nut manufacturing apparatus, which is comprised of a nut supply path 2, a ring supply path 3, a ring pushing part 4 into the nut cylinder, and a nut cylinder caulking part 5.

The nut supply path 2 has a cross-sectional shape that allows the nuts 6 to fall with the cylindrical portion 6a around the screw hole facing forward, and its upper end connects to a vibrating pole hopper feeder (not shown) that supplies the nuts 6. are doing.

The ring supply path 3 is formed in a cross-sectional shape in which the synthetic resin anti-rotation rings 7 are aligned in the same direction and dropped, and its upper end is connected to a vibrating ball hopper feeder (not shown) that feeds the anti-rotation rings 7. are doing.

In the ring pushing part 4 into the nut cylindrical part, 8 is the main first
It is a circular plate, and is disposed below the lower end outlet 2a of the nut supply path 2, and is fixed to the outer periphery of the horizontal rotation drive shaft 9.

This main first disk 8 has semicircular notch grooves 10 provided at regular intervals on its outer periphery in which the nuts 6 can be accommodated.

Each cutout groove 10 is configured to receive one nut 6 from the nut supply path 2.

Reference numeral 11 denotes a sub-first disk, which is disposed below the lower end outlet 3a of the ring supply path 3 and is fixed to the outer periphery of the rotary drive shaft 9.

The auxiliary first disc 11 has a semicircular notch 12 in which the detent ring 7 can be accommodated, at a position facing the notch 10 of the main first disc 8 on the outer periphery.

Therefore, the nut 6 in the notch groove 10 of the main first disc 8 is
It is concentric with the detent ring 7 in the cutout groove 12 of the disc 11.

Reference numeral 13 denotes a pressing means for pushing the detent ring T of the auxiliary first disc 11 into the cylindrical portion 6a of the nut 6 of the main first disc 8.

In the pressing means 13, 14 is a ring body fixed to the rotary drive shaft 9, and each notch groove 12 of the sub-first disk 11 is
A push rod 16 is slidably inserted through each of the through holes 15, and the push rod 16 is returned to a position away from the sub-first disc 11 by a spring 17. There is.

18, the push rod 16 is pivoted downward. This is a fixed cam that guides the push rod 16 toward the auxiliary first disc 11 side in the section (4) on the way to the ring body 14, and is immovably disposed at a position opposite to the auxiliary first disc 11 side of the ring body 14. ing.

19 is a nut in the cutout groove 10 of the first main disc 8. 6 and a fixed guide plate for preventing the detent ring 7 in the notch groove 12 of the auxiliary first disc 11 from coming off, and is provided between the main first disc 8 and the auxiliary first disc 11, The section where the rotation stopper ring 7 is pushed into the cylindrical portion 6a of the nut 6 (N has an arcuate long hole 20
is provided so that the movement of the locking ring 70 to the nut 6 is not obstructed.

A passage 21 for communicating the nut supply path 2 and the notch groove 11 and a passage 22 for communicating the ring supply path 3 and the notch groove 12 are provided in the upper part of the fixed guide plate 19, On the other hand, a discharge hole 23 is provided at the lower part of the fixed guide plate 19, and the nut 6 is discharged downward from the notched groove 10 through the discharge hole 23 in contact with an annular groove 24 provided on the outer periphery of the main first disc 8. A discharge plate 25 is provided for this purpose.

In the nut cylindrical part caulking part 5, 26 is a second disk, which is provided below the lower end outlet 27a of the guide path 27 of the nut 6 discharged from the discharge hole 23 of the combination mechanism 4, and a horizontal intermittent rotation drive shaft 28 It is attached to the outer periphery of.

This second disc 26 has semicircular notched grooves 29 at regular intervals on its outer periphery in which the nuts 6 can be accommodated.

The second disc 26 is configured to rotate intermittently so that each notched groove 29 corresponds to the lower end outlet 27a of the guide path 27 in order to receive the nuts 6 in the guide path 27 one by one.

Numeral 30 is a press means for applying an inward squeezing action to the cylindrical portion 6a of the nut 6 during its downward movement, and includes a fixed support member 31 that supports the surface 6b of the nut 6 opposite to the cylindrical portion 6a; 6 into the notch groove 29 of the second disc 26 by the cylinder 32.
It is formed of a press rod 33 for pressing and fixing against the bottom, and a press rod 34 for drawing and forming the tip of the cylindrical portion 6a of the nut 6.

At the nut stop position A two places before the press rod 34,
A contact terminal 35 is provided that penetrates into the cylindrical portion 6a of the nut 6 and detects the presence or absence of the detent ring 1 by electrical conduction with the nut 6.

This contact terminal 35 is connected to an alarm such as a lamp or a buzzer, and is configured to stop the drive cylinder 36 of the press rod 34.

The contact terminal 35 is slidably attached to the support member 3γ integral with the press rod 34, and is attached to the second contact terminal by a spring 38.
The disc side 26 is biased.

In addition, at the nut stop position opening one position before the press rod 34,
A part of the tip of the cylindrical portion 6a of the nut 6 is slightly bent inward to provide a temporary fixing press rod 39 for preventing the rotation stop ring T from popping out.

This temporary fixing press rod 39 is also integrally attached to the press rod 34, and the press rod 34 and the temporary fixing press rod 3
9 and the contact terminal 35 are driven as a group in the direction of arrow f.

40 and 41 are nuts 6 in the locking groove 29 of the second disc 26
This is a guide plate that prevents the objects from flying out.

A discharge port 42 for dropping the nut 6 and a scraping plate 43 for guiding the nut 6 downward are provided at the lower part of the guide plate 41.

The operation of the nut manufacturing apparatus configured as described above will be described.

First, mark the main first disc 8 and the sub first disc 11 with the arrow g.
If the nut 6 and the detent ring 7 are supplied to the nut supply path 2 and the ring supply path 3 while rotating the second disk 26 intermittently in the direction of the arrow h, The nuts 6 are fitted one by one into the notched grooves 10 of the main first rotary plate 8 of the combination mechanism 4,
The anti-rotation rings 7 are fitted into the notch grooves 12 of the sub-first rotary plate 11 one by one.

When the nut 6 and the stop ring 7 turn downward together with the first disk and reach the section hx, the push rod 16 corresponding to the stop ring 7 comes into contact with the fixed cam 18 and the auxiliary first disk 11 side, the detent ring 7 is pressed by the push rod 16 and pushed into the cylindrical portion 6a of the nut 6, and after passing through section (4), the detent ring 7 is released from being suppressed by the push rod 16, and is pushed into the cylindrical portion 6a of the nut 6. 6
remains within a.

The nut 6 into which the rotation stopper ring 7 is fitted is discharged downward from the discharge hole 23 and is then dropped and supplied to the caulking mechanism 5 via the guide path 27.

The nuts 6 that are supplied fall are fitted into the notch grooves 29 of the second disc 26 one by one.

When the nut 6 intermittently pivots downward together with the second disc 26 and reaches a position corresponding to the contact terminal 35, the contact terminal 35 projects toward the second disc 26 together with the press rod 34.

At this time, if the rotation stop ring 7 is inside the cylindrical part 6a, the contact terminal 35 will come into contact with the rotation stop ring 7 and the insulation state with the nut 6 will be maintained;
If not, the contact terminal 35 contacts the nut 6 and becomes conductive, activating the alarm and immediately stopping the operation of the press rod 34.

When the nut 6 that has passed through the contact terminal 35 reaches a position corresponding to the temporary press rod 39, the temporary press rod 39 projects together with the press rod 34 toward the second disc 26, and a part of the tip of the cylindrical portion 6a is removed. is deformed inward, and the rotation stop ring 7 is temporarily fixed.

When the nut 6 that has passed through the temporary press rod 39 reaches the position corresponding to the press rod 39, the press rod 33 first presses and fixes the nut 6, and then the press rod 34 moves to the second disk 26 side. The tip of the cylindrical portion 6a is pressed and squeezed inward to completely fix the rotation stop ring 7 to the nut 6.

When the locking nut, which has been narrowed down and shaped as shown in FIG. 2, moves to the lower position of the second disc 26, it falls downward from the discharge port 42 and is discharged.

As shown in the embodiments above, the nut manufacturing apparatus according to the present invention is configured such that the nut and ring supply path, the combination mechanism, and the caulking mechanism are arranged vertically so that the nut and the locking ring can be transferred by gravity dropping means. Therefore, the structure is not complicated, there are few failures, and it can be manufactured at low cost. In addition, since no forced pressing force is applied to the parts, there is no risk of deforming or damaging the parts.

Furthermore, since the nuts and the locking ring are continuously supplied and transferred, the processing speed can be improved.

Furthermore, since each supply channel and each mechanism are arranged above and below, the apparatus does not take up much space laterally, and the area occupied by the entire apparatus can be made extremely small.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, with the first figure being a front view and the second figure being a front view.
The figure is a partially cutaway perspective view of the nut, Figure 3 is an exploded perspective view of the combination mechanism, Figure 4 is a vertical sectional view of the combination mechanism, Figure 5 is a sectional view taken along line XX in Figure 4, and Figure 6 is FIG. 7 is an exploded perspective view of the caulking mechanism, FIG. 7 is a longitudinal sectional view of the caulking mechanism, and FIG. 8 is a YY sectional view of FIG. 2... Nut supply path, 3... Ring supply path, 4... Combination mechanism, 5... Caulking mechanism, 6... Nut, 6a... Cylindrical portion, 7... Stop ring, 8... Main first disk, 10... Notch groove, 11...
Sub-first disk, 12...notch groove, 13...pressing means, 34...press rod.

Claims (1)

[Claims] 1. A nut supply path for dropping and supplying a nut having a cylindrical portion around a screw hole on an end surface, and a ring supply path for dropping and supplying a rotation stopper ring to be inserted into the cylindrical portion are provided above, and a lower part of both supply paths is provided. The main first disc has a plurality of semicircular notched grooves formed at regular intervals on its outer periphery for storing nuts dropped and supplied from the nut supply path, and the half of the main first disc. A sub-first disk having a similar notch groove formed on its outer periphery in correspondence with the circular notch groove, and a ring pressing device consisting of a push rod for pushing the ring into the cylindrical portion of the nut are mounted on the same rotational drive shaft. It is fixed to form a ring pushing part into the nut cylindrical part, and at the bottom of this ring pushing part,
a second disk having a semicircular notched groove on its outer periphery for receiving the nut containing the ring; and a press rod that exerts an inward squeezing action on the cylindrical portion of the nut that is transferred downward by the second disk. A nut manufacturing device comprising a nut cylindrical part and a caulking part.