JPH0713883Y2 - Tool mounting slide actuator in spring making machine - Google Patents

Description

[Detailed description of the device]

[0001]

[Industrial application] This invention is applied to spring manufacturing machines.
The present invention relates to an operation device for a tool attachment slide to which a bending die, a cutter, a pitch tool, etc. are attached.

[0002]

2. Description of the Related Art A conventional spring manufacturing machine as shown in FIGS. 1 and 2 is known. That is, the spring manufacturing machine faces at least a pair of wire rod feed rollers 2 that press the wire rods to feed them into the wire rod working space 1, and the wire rod working space 1 that faces the wire rod feeding rollers 2 with the wire rod working space 1 in between. A slide 3 for bending dies that can move back and forth, a pair of upper and lower cutter slides 4 that face each other and can move back and forth toward the wire rod processing space 1, a core metal 5 arranged in the wire rod processing space 1, and It has a pitch tool slide rod 6 that can move back and forth in a direction perpendicular to the paper surface. The bending die 8 is attached to the bending die slide 3, the cutter 9 is attached to the lower cutter slide 4, and the pitch tool 10 is attached to the pitch tool slide rod 6. In the state of FIG. 1, the upper cutter slide 4 is not used.

The bending die slide 3 is urged by a spring 12 in a direction away from the wire rod processing space 1, and the bending die slide 3 is slidably operated by a slide actuator 14 as described below. .
The slide actuating device 14 includes a rotary cam 15 rotated by a motor (not shown), and the rotary cam 15
An L-shaped first swing lever 18 having a cam follower 16 that abuts on the pivot shaft 17 as a center, and a pivot die 22 that abuts the bending die slide 3 via a screw 21. The second swing lever 23, the slit 19 formed in the first swing lever 18 in the radial direction and the slit 24 formed in the second swing lever 23 in the radial direction, and First swing lever 1
8 has a slide 27 whose position can be changed by a screw mechanism 26. The slide 27 has two sliding pieces 27a connected by a pivot 28, and these sliding pieces 27a are fitted in the slit 19 and the slit 24, respectively. With the above structure, the swing angle of the second swing lever 23 can be adjusted by changing and fixing the position of the slide 27. By the way, in the conventional slide actuating device 14, the slit 19 and the slit 24 overlap so that the cam follower 16 is positioned near the middle of the lowest position and the highest position of the rotary cam 15. To
It was designed and manufactured. The reason is that the first swing lever 1
It is a fixed point that it is possible to swing the first swing lever 18 up and down from the reference position by substantially the same amount by setting the middle of the swing range of 8 as the reference position.

Although not shown, the cutter slide 4 and the pitch tool slide rod 6 are also actuated by a tool mounting slide actuating device similar to the slide actuating device 14.

For example, the taper spring is manufactured by pressing a wire rod pushed out into the wire rod processing space 1 by the wire rod feed roller 2 against a bending die 8 retracting from the wire rod processing space 1 to bend the wire rod.

[0006]

Disadvantages of the Prior Art The conventional slide actuator 14 has the following drawbacks. That is, since the slit 19 and the slit 24 overlap each other when the cam follower 16 is positioned near the middle of the lowest position and the highest position of the rotary cam 15, the second swing lever 23 is arranged. When the position of the slide 27 is changed / fixed in order to adjust the swing angle of the slit 19, the slit 19 and the slit 24 are moved.
The swing angle of the second swing lever 23 expands or narrows on both sides (right side and left side in FIG. 2) with reference to the position where and overlap. As a result, every time the swing angle of the second swing lever 23 is adjusted, the position where the screw 21 of the second swing lever 23 is moved to the right side (the wire processing space 1 side) is changed and the screw 21 is pushed. In order to prevent the bending die 8 attached to the bending die slide 3 from colliding with the cored bar 5, the position of the screw 21 abutting on the bending die slide 3 must be changed. .

[0007]

OBJECT OF THE INVENTION This invention has been made to solve the above-mentioned drawbacks.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in FIGS. In the embodiments, the same members as those of the conventional example are designated by the same reference numerals. Cam follower 16
The slit 19 of the first rocking lever 18 and the slit 24 of the second rocking lever 23 overlap each other in a state in which is located at the highest position of the rotary cam 15. With such a configuration, even if the position of the slide 27 is changed, the position where the screw 21 of the second swing lever 23 is moved to the wire rod processing space 1 side most does not change.
There is no need to change the position of. When the slit 19 of the first swing lever 18 and the slit 24 of the second swing lever 23 overlap each other, the cam follower 16 moves the rotary cam 1
5, so that the first swing lever 18 does not rotate further counterclockwise in FIG. 3 when the cam follower 16 is located at the highest position of the rotary cam 15. , A stopper 32 that comes into contact with the first swing lever 18 and the second swing lever 23
Is provided via a mounting member 31, and the stopper 32
Is a fixed part 33 having an abutment surface 33a, and the fixed part 3
3, a sliding body 34 that is provided so as to be movable back and forth toward the second swing lever 23, and this sliding body 34 is attached to the second swing lever 2
3 and a spring 35 that biases the protrusion 3 toward the protrusion.

[0009]

The present invention has the following effects due to the above-mentioned configuration. When the cam follower 16 is located at the highest position of the rotary cam 15, the first swing lever 18 and the second swing lever 18
Since the slits 19 and 24 of the swing lever 23 overlap each other, even if the position of the slide 27 is changed, the action point of the tool mount slide 3 of the second swing lever 23 is on the wire rod processing space 1 side. Since the most moved position does not change,
It is not necessary to change the position of the action point of the tool attachment slide 3 of the second swing lever 23. The slits 19 and 24 of the first swing lever 18 and the second swing lever 23 are made to overlap each other, and in this state, the stopper 32 that abuts the other member to the first swing lever 18 or the second swing lever 23. The stopper 32 includes a fixed portion 33 having an abutting surface 33a, a sliding member 34 provided on the fixed portion 33 so as to be movable back and forth toward the other member, and this sliding member 34 is provided on the other side. And a spring 35 that biases the member toward the member,
The sliding body 34 biased by 5 absorbs the impact when the fixed portion 33 hits the second swing lever 23 or the first swing lever 18, while preventing the cam follower 16 from floating from the rotary cam 15. Can be done.

[Brief description of drawings]

FIG. 1 is a front view of a conventional spring manufacturing machine.

FIG. 2 is a front view of a main part of a tool attachment slide operating device in a conventional spring manufacturing machine.

FIG. 3 is a front view of an essential part of the embodiment of the present invention.

FIG. 4 is an enlarged sectional view taken along line IV-IV of FIG.

5 is an enlarged sectional view taken along line VV of FIG.

[Explanation of symbols]

 3 Slide for bending die 15 Rotating cam 16 Cam follower 18 First swing lever 19 Slit 23 Second swing lever 24 Slit 27 Slide 32 Stopper 33 Fixing part 33a Abutment surface 34 Sliding body 35 Spring

Claims (1)

[Scope of utility model registration request] 1. A first swing lever 18 having a rotary cam 15 and a cam follower 16 that abuts on the rotary cam 15.
A second swing lever 23 that is in contact with or connected to the tool mounting slide 3, a slit 19 formed in the first swing lever 18 that is long in the radial direction, and a radial direction that is formed in the second swing lever 23. A slide mounting device which is fitted to a long slit 24 and which is provided on the first swing lever 18 or the second swing lever 23 so that the position thereof can be changed. In a state where the follower 16 is located at the highest position of the rotary cam 15, the slits 19 and 24 of the first swing lever 18 and the second swing lever 23 are overlapped with each other,
In this state, in order to prevent the cam follower 16 from floating above the rotating cam 15, the first swing lever 1
8 or the second swing lever 23 is provided with a stopper 32 that comes into contact with the other member. The stopper 32 has a fixing portion 33 having a contact surface 33a, and the fixing portion 33 that faces the other member. Sliding body 34 that can be moved forward and backward
And a spring 35 for urging the sliding body 34 so as to project toward the other member.