JPS6040941B2 - Wire feeding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wire feeding device, generally called a gripper feeder or the like, which feeds a fixed amount of wire into a working machine such as a press.

Conventionally, this type of wire feeding device has been used to feed the wire in two directions in its longitudinal direction.
The machine is equipped with a machine for clamping and unclamping at multiple locations, and a feed mechanism that feeds the clamped wire into the working machine, but it is not possible to operate both mechanisms with high precision only by rotating the input shaft. This is difficult, and complicated configurations such as the combined use of a drive device using pneumatic pressure as a drive source have been adopted.

In view of the above points, the present invention provides a wire feeding device configured so that both of the mechanisms described above can be operated with high precision by a single drive source.

The present invention will be explained below with reference to illustrated embodiments.

As shown in FIGS. 1 to 3, the wire feed device of the illustrated embodiment includes a first clamp device 1 arranged to clamp and unclamp the wire at a fixed position on the wire transfer path A. , and a second clamp device 2 arranged to clamp and unclamp the wire on the downstream side of the first clamp device 1 in the wire transfer direction B. The second clamp device 2 is movable along the guide rod 5 in the wire transport direction B and the opposite direction. In addition, the first
and the second clamping devices 1 and 2 are connected to the first clamping device 1 of the oscillating drive 6, the overall configuration of which is schematically shown in FIG.
The clamping/unclamping operation is controlled by the first swinging arm 3 iron-mounted to the upper end small portion 7a of the output shaft 7, while the movement of the second clamping device 2 along the guide wall 5 is
It is controlled by the second swing arm 4 adjacent to the small light portion 8a at the upper end of the second output shaft 8 of the oscillating drive 6. Above oscillating drive 6
(See especially FIG. 7) consists of two cams 29 and 30 that are integrally iron-bonded on the input shaft 28, and two rolling roller followers 33 and 34 that engage with these cams 29 and 30, respectively. When the input shaft 28 is continuously driven to rotate,
The two turrets 31 and 32 as well as the first output shaft 7 and second output shaft 8 that are integrally bonded to each of these turrets are caused to perform rocking rotations E and F according to the shapes of the cams 29 and 30, respectively. It has become.

Note that this type of oscillating drive itself is well known. As shown particularly clearly in FIGS. 5 and 6, the first clamping device 1 has a bottom housing 9 (first
It has a fixed block 10 fixed to the upper surface of the wire (FIGS. 3 to 3), and an upward stepped surface 12 that serves as a support surface for the wire rod 11 is formed at the bottom of the fixed block 10.

Inside the fixed block 10, there is a sliding plate 13 that can move in a direction perpendicular to the wire rod 11, a cylindrical gripper that can swing and rotate around an axis parallel to the wire rod 11, and a cylindrical gripper. 15 is attached, and the super moving plate 13 and the gripper 15 are connected by a spring plate 14. Furthermore, a step surface 16 is formed on the outer circumference of the gripper 15 to clamp and unclamp the wire 11 in cooperation with the upward step surface 12. Note that 17 in the figure indicates the upper cover of the fixed block 10. Since the first clamping device 1 is configured as described above, when the sliding plate 13 is slid, the gripper 15 swings and rotates via the spring plate 14, and the gripper 15 rotates upward according to the direction of rotation. The wire 11 can be clamped between the step surfaces 12 and 16 (FIG. 6), or the wire 11 can be unclamped (FIG. 5).

Therefore, the configuration in which the wire rod 11 is clamped between both stepped surfaces 15 and 16 by rotating the gripper 15 as described above prevents the wire rod 11 from being damaged during clamping, and the diameter of the wire rod 11 can be varied within a considerably large range. It is advantageous in that it can be clamped well even if the 2nd above
The configuration for clamping and unclamping the wire 11 in the clamp device 2 (FIGS. 1 to 3) is substantially the same as that of the first clamp device 1 shown in FIGS. 5 and 6.

However, the second clamp device 2 has the first clamp device 1
In place of the fixed block 1, a movable block 18 that is movable along the guide rod 5 is provided, and within this movable block 18, the sliding plate 13, the spring plate 14, and Step plate 1 similar to gripper 15
9, a spring plate 20 and a gripper 21 are provided, respectively. In addition, the movable block 18 is formed with an upward step surface 22 similar to the upward step surface 12 of the fixed block 10, and cooperates with a hard surface 23 formed on the outer periphery of the gripper 21 to clamp and unclamp the wire. It looks like this. At one end (top end in FIG. 1) of the sliding plates 13 and 19 of the first clamping device 1 and the second clamping device 2, a connecting piece 2 is formed with downwardly open guide grooves 24a and 25a, respectively.
4 and 25 are provided.

Further, the first swing arm 3 is arranged below the connecting pieces 24 and 25 (FIG. 2), and has the guide groove 24 at both ends thereof.
A roller follower 26 that engages with each of a and 25a.
and 27 are provided to protrude upward. Therefore, the first output shaft 7 of the oscillating drive 6 (FIG. 7) swings and rotates, and in response, the first swing arm 3, for example,
If the roller follower 2 swings counterclockwise as shown in the figure,
6 slides the sliding plate 19 downward in FIG. 1 while moving within the guide groove 25a, while the roller follower 27 moves within the guide groove 24a.
The sliding plate 13 is slid upward in FIG. 1 while rolling inside. It is clear from the above description that the first clamping device 1 unclamps the midorimura and the second clamping device 2 clamps the wire due to the sliding of the Numakin plates 13 and 19. As shown in FIGS. 1 to 3 and 8, the second swing arm 4 extends horizontally at a lower position of the movable block 18 (particularly in FIG. 2), while at the bottom of the movable block 18. A bottom groove 35 is formed which opens downward and extends in a direction perpendicular to the line transfer path A.

Further, a receiving groove 36 extending in the longitudinal direction of the arm 4 and opening upward is formed in the second swing arm 4, and a slider 37 is slidably fitted in the receiving groove 36. A pressure roller follower 38 is provided on the upper surface of the slider 37;
A small-diameter roller follower 39 whose outer peripheral surface is covered with an elastic material such as rubber is provided in a protruding manner. These pressing roller follower 38 and small diameter roller follower 39 are engaging members that engage with the bottom groove 35. The pressure roller follower 38 always touches one of the side wall surfaces of the bottom groove 35 of the movable block 18 when the second swing arm 4 swings around the second output shaft 8 of the oscillating drive 6 (FIG. 7). The movable block 18 is moved along the guide groove 5.

That is, for example, in FIG. 8, when the second swing arm 4 swings clockwise, the pressure roller follower 38 moves into the bottom groove 3.
The movable block 18 is moved toward the left end position G by moving on the left side wall of the block 5 and pressing it to the left. Further, when the second swing arm 4 swings counterclockwise from the left position, the pressure roller follower 38 moves into the bottom groove 3.
The right side wall surface of No. 5 is pressed toward the right end position. The small diameter roller follower 39 and the pressure roller follower 38 are adjacent to each other in the longitudinal direction of the second swing arm 4 and protrude from the upper surface of the slider 37.
and the second output shaft 8 of the oscillating drive 6 (FIG. 7) are arranged so that the distance between the press loaf follower 38 and the output shaft 8 is smaller than the distance between the press loaf follower 38 and the output shaft 8.

Also, a small diameter. The rolling center 39' of the roller follower 39 is arranged at a position displaced in the lateral direction of the second swing arm 4 (to the right in FIGS. 1 and 8) with respect to the rolling center 38' of the pressure roller follower 38. Therefore, the small diameter roller follower 39 is activated when the movable block 18 reaches the end position of its travel stroke. It comes into pressure contact with the corresponding side wall surface of the bottom groove 35 of the hook 18. That is, for example, when the movable block 18 moves to the left in FIG. The roller follower 39 engages with the right side wall surface of the bottom groove 35.

As described above, since the outer circumferential surface of the small diameter roller follower 39 is coated with an elastic material, the small diameter roller follower 39 is brought into an elastic state in which it is tightly engaged with the right side wall surface of the bottom groove 35 due to the elastic force. In this way, the end position G
Since the pressure roller follower 39 and the small roller follower 38 are in pressure contact with the left and right side wall surfaces of the bottom groove 35, respectively, rattling between the second swing arm 4 and the movable block 18 is completely prevented. On the same machine, movable block 18
When it reaches the right end position, the small diameter roller follower 39 and the pressing roller follower 38 are in the bottom groove 35, respectively.
The movable block 18 is pressed against the left and right side wall surfaces of the movable block 18, thereby preventing rattling between the second swing arm 4 and the movable block 18. By preventing rattling at the end position of the movement stroke as described above, the movable block 18 can respond to the swinging of the second swinging arm 4.
Errors in the amount of printing can be prevented.

It is clear that this makes it possible to operate with high precision, eliminating errors in the amount of wire feed. Next, the slider 37 is connected to the inner end of a threaded rod 41 that moves in the longitudinal direction by rotating the rotating knob 40, and is threaded.

The inside of the receiving groove 36 can be moved integrally with the head 41. Therefore, when the slider 3-7 is slid in this way, the pressure roller follower 38 and the small diameter roller follower 39 are also moved together with the slider 37, and the second swing arm 4
The second output shaft 8, which is the center of oscillation, and the pressure roller follower 3
The distance to 8 changes. Therefore, the pressure roller follower 3
Since the engagement position between the movable block 9 and the bottom groove 35 of the movable block 18 changes, the amount of movement of the movable block 18 in response to the swing of the second swing arm 4 can be changed. In this manner, in the illustrated embodiment, the amount of movement of the movable block 18, that is, the amount of feed of the wire rod can be changed by the simple operation of rotating the rotation knob 40. Note that the rotation knob 40 has a scale 40 that displays the amount of movement of the movable block 18.
A is attached. The bran feeding device of the illustrated embodiment has the above-mentioned structure, and its operation will be explained below. First, when the wire rod feed device is in the state shown in FIGS. 1 to 3, the wire on the wire rod transfer path A is clamped only by the first clamp device 1, and from this state
The swing arm 4 swings counterclockwise in FIG. 1, and in response, the movable block 18 and therefore the second clamp device 2 move to the right in FIG. 1 along the guide rod 5.

When the second clamping device 2 reaches the right end position, the second swinging arm 4 comes to rest, and the first swinging arm 3 is turned counterclockwise (
(Fig. 1) begins. Therefore, the sliding plates 13 and 19 of the first clamping device 1 and the second clamping device 2 slide upward and downward, respectively, and the first clamping device unclamps the wire, while the second clamping device Clamp the bran wood. Thereafter, the second swing arm 4 begins to swing clockwise (FIG. 1), and in response to this swing, the second clamp device 2 is moved toward the left in FIG. However, since only the second clamping device 2 is clamping the wire at this time, the wire is fed in the bran feed direction B as the second clamping device moves. This leftward movement of the second clamping device continues until the second clamping device reaches the left end position, as shown in FIG. It is fed into the working machine. When the second clamping device 2 reaches the pupil shown in Fig. 4, the second swinging arm 4 comes to a standstill, and then the first swinging arm 3 starts swinging clockwise (Fig. 4). The second clamp pupil 2 unclamps the wire, and the first clamp device 1 clamps the wire.

In this state, after the first swing arm 3 comes to rest, the second swing arm 4 swings in the direction of the rebound indicator, and returns the second clamping device that is not clamping the wire to the position shown in FIG. I will go. The swinging of the first swinging arm 3 and the second swinging arm 4 at the above-mentioned timing is achieved by appropriately designing the shapes of the cams 29 and 30 of the oscillating drive 6 (FIG. 7). This can be produced by making the two output shafts 7 and 8 perform appropriate rocking rotations.

The above-described operation cycle from the state shown in FIG. 1 to the state shown in FIG. 4 and back to the state shown in FIG. It is something that will continue to be done. As is clear from the above, the wire rod feeding device of the present invention rotates the input shaft 28 of the oscillating drive 6 by a single drive source, thereby performing the clamping/unclamping operation of the wire rod and the feeding operation of the twill material. Because of this configuration, the structure is extremely simple compared to conventional devices that use a plurality of drive sources.

In addition, since the structure does not incorporate gears etc. that cause backlash, there is no risk of rattling during operation and associated operational errors, and it has the advantage of being able to operate smoothly and with high precision. be. Furthermore, in the present invention, when the movable block reaches the end position of its travel stroke, the small diameter roller follower 39 and the pressure roller follower 38
are in pressure contact with the respective side wall surfaces of the bottom groove 35 to prevent wobbling between the second swing arm 4 and the movable block 18. Errors in the amount of sliding of the movable block 18 depending on the movement can be prevented, and the second swing arm 4 can be easily moved by sliding the slider 37 in the receiver 36 in the direction of the sea bream line of the second swing arm 4. The amount of movement of the movable block 18 according to the rocking of
That is, there is an advantage that the feed rate of the wire rod can be changed.

[Brief explanation of the drawing]

Fig. 1 is a top view of the wire feeding device according to the embodiment of the present invention, Fig. 2 is a front view of Fig. 1, Fig. 3 is a side explanatory view of Fig. 1, and Fig. 4 is an explanatory side view of Fig. 1.
Figure 5 is a top view similar to Figure 1, showing the state in which the second clamp device has reached one end of its movement process;
A partial perspective view showing the clamping device, FIG. 6 is the first part of FIG.
A left side view of the clamping device, showing a state where the first clamping device is clamping the wire, FIG. 7 is a top explanatory view showing the oscillating drive, FIG. 8 is the structure of the second swing arm, and FIG. 7 is an explanatory top view showing the relationship between the second swing arm and the movable block. 1...First clamp device, 2...Second
Clamp device, 3...First swing arm, 4...
...Second swing arm, 5...Guide rod, 6.
...Oscillating drive, 7...
First output shaft, 8...Second output shaft, 10...
Fixed block, 11...Wire rod, 15...Gripper, 18...Movable block, 22...
Gripper, 28... Input shaft, 35...
Bottom groove, 36... Receiving groove, 37... Slider, 38... Pressing roller follower, 39... Small diameter roller follower. Figure 1 Figure 2 Figure 3 Figure 5 Figure 6 Figure 4 Figure 7 Figure 8

Claims (1)

[Claims] 1. Clamping and clamping of the wire at a fixed position on the wire transport path
a first clamp device arranged to perform unclamping; and a first clamp device arranged to perform clamping and unclamping of the wire at a position downstream of the first clamp device on the wire transfer path;
and a second clamping device that is equipped with a movable block and is configured to be able to reciprocate along the wire transfer path, and the input shaft is continuously driven to rotate, and the first and second output shafts are oscillated and rotated in a predetermined relationship. an oscillating drive that generates an oscillating drive; and a first and second clamping device fitted to the first output shaft and operatively connected to the first and second clamping devices in response to oscillating rotation of the first output shaft. a first swinging arm that performs clamping/unclamping operations in a predetermined relationship;
a second swinging arm fitted onto the output shaft and operatively connected to the movable block to cause the second clamp device to perform the reciprocating movement in accordance with the swinging rotation of the second output shaft; The movable block has a bottom groove that extends horizontally in a direction perpendicular to the wire transfer path and is open downward, and is configured to be able to reciprocate along the wire transfer path. A receiving groove extending horizontally at the second swing arm and extending in the axial direction and opening upward is formed in the second swing arm, and a slider is slidably fitted into the receiving groove, and a pressing roller follower on the top surface of the slider that engages with the bottom groove of the movable block and presses the side wall surface of the bottom groove when the second swing arm swings to move the movable block along the wire transfer path; A small-diameter roller follower whose outer peripheral surface is made of an elastic material such as rubber is bored, and the pressure roller follower and the small-diameter roller follower are adjacent to each other in the longitudinal direction of the second swing arm, and the rolling centers of these roller followers are mutually aligned. By arranging the second swinging arm to be laterally displaced, when the movable block reaches the end position of its travel stroke in response to the swinging of the second swinging arm, the pressure roller follower moves as described above. A configuration in which the small-diameter roller follower is pressed against one side wall surface of the bottom groove of the movable block, while the small diameter roller follower is pressed against the other side wall surface of the bottom groove, thereby preventing rattling between the second swing arm and the movable block. and a movable block corresponding to the swinging of the second swinging arm by sliding the slider together with the pressure roller follower and the small diameter roller follower in the axial direction of the second swinging arm in the receiving groove. A wire feeding device configured to adjust the amount of movement of the wire rod. 2. In the wire feeding device according to claim 1, the first clamping device swings on a rotation axis parallel to a fixed block having an upward stepped surface for supporting the wire rod and a wire rod transfer path. It is mounted in a fixed block so as to be rotatable, and has a stepped surface on its outer periphery that rotates in a direction toward and away from the upward stepped surface to clamp and unclamp the wire on the upward stepped surface during rocking rotation. The movable block has a substantially cylindrical gripper, and the movable block is formed with an upward step surface for supporting the wire rod, and the second clamp device is configured to oscillate and rotate on a rotation axis parallel to the wire rod transfer path. The stage is mounted in the movable block so as to be able to move, and rotates in the direction toward and away from the upper step surface of the movable block during the swing rotation, and clamps and unclamps the wire on the upper step surface. A wire rod comprising a substantially cylindrical gripper having a surface formed on the outer periphery, and operatively connecting the gripper of the first clamping device and the gripper of the second clamping device to both ends of the first swinging arm, respectively. Feeding device.