JP2729411B2 - Feed machine for press machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a feed adjusting device for a press that adjusts a feed amount of a work to be sent to the press, and more particularly, to a feed roller that rotates to feed the work. The present invention relates to a feed adjusting device for a press, which adjusts a feed amount of a work by adjusting a rotation angle.

2. Description of the Related Art Conventionally, as a device for adjusting a feed amount of a work by a rotation angle of a rotating feed roller, a device described in Japanese Patent Publication No. 55-4977 is known.

In this device M0, as shown in FIGS. 4 and 5, a lever 2 fixed to a rotating shaft 1a of a feed roller 1 has a slide groove 2a at a tip. In this slide groove 2a, a slide block 3 which is axially mounted on the lower end of the joint guide 4 is arranged.

The upper end of the joint guide 4 is axially mounted on a lever 8 which reciprocates linearly in the horizontal direction.
A holding member 5 for holding the joint guide 4 and defining the swing center position of the joint guide 4 is disposed at an intermediate portion.

The holding member 5 is rotatably held by a nut 6, and the nut 6 is screwed to a spindle 7 rotatably supported by a housing 9.

In the feed adjusting device M0, when the lever 8 reciprocates linearly, the joint rod 4 swings around the holding member 5 to move the slide block 3 at the lower end into the slide groove.
The lever 2 is rotated at a fixed angle while sliding within 2a. Then, since the lever 2 rotates at a fixed angle, the feed roller 1 rotates with the rotation, and the work W held between the feed roller 1 and the pressing roller 10 is intermittently fed. When the work W is fed by a mechanism (not shown), the press roller 10 approaches the feed roller 1 so that the work W can be sandwiched between the feed roller 1 and the feed roller 1 is moved in a direction opposite to the feed direction. When rotating in the direction, it is configured to move away from the feed roller 1.

In the feed adjusting device M0, when adjusting the feed amount of the work W by changing the rotation angle of the feed roller 1, the handle 7a of the spindle 7 is turned, and the holding member 5 together with the nut 6 is moved to the spindle 7. It was done by moving along. That is, when the holding member 5 moves, the swing center position of the joint guide 4 is changed,
This is because even if the distance of the reciprocating linear movement of the lever 8 is constant, the deflection angle of the lever 2 is changed, and the rotation speed of the feed roller 1 is adjusted.

<Problems to be Solved by the Invention> However, in the conventional feed adjusting device M0, the joint guide 4 has the upper end connected to the lever 8 which reciprocates linearly, and the lower coal is transferred to the lever 2 extending from the feed roller 1. Are connected using the slide groove 2a.

With such a connection mode, the workpiece may be damaged when the workpiece is minutely fed.

For example, as shown in FIG. 6, when the length l of the joint guide 4 is 209 mm, the reciprocating distance 2a of the lever 8 is 120 mm, and the radius of the feed roller 1 is 50 mm, the feeding motion at the time of minute feeding is examined. Then, the following state is obtained.

First, the position of the holding member 5 when the feed amount is set to 0 is represented by k =
Set to 0. This position (k = 0) is such that the center 3a of the sliding block 3 (the connecting portion of the sliding block 3 and the joint rod 4) and the center 5a of the holding member 5 ( And the center 5a of the holding member 5 is a position where the length b is 200 mm from the moving part of the lever 8.

In this position (k = 0), when the connecting portion 4a of the joint guide 4 with the lever 8 is positioned directly above the rotary shaft 1a during the reciprocating linear movement of the lever 8 (see FIG. 7). Also, it can be seen that the lever 2 is positioned in the vertical direction and the rotation shaft 1a is not rotated.

However, when the upper end 4a of the joint 4 is located in the middle of them, as shown in FIG. 8, the center 3a of the slide block 3 is shifted from the center 5a of the holding member 5, and the joint 4 is inclined. Therefore, in practice, the center 3a of the sliding block 3 is shifted from the center 5a of the holding member 5 in the horizontal direction by the length of (lcos θ−b) × tan θ. This means that the feed roller 1 is rotated.

Unnecessary rotation of the feed roller 1 is unnecessary even if the center 5a of the holding member 5 is sequentially raised upward from the position of k = 0 to a position of k = 12 mm, as shown in FIG. It appears as movement. Note that each curve in FIG. 9 shows the moving distance of the outer peripheral surface of the feed roller 1 as the lever 8 reciprocates.

When the final feed distance L0 of the work by the feed roller 1 at that time is compared with the maximum feed distance L1 in the middle, the first
It looks like a table.

As can be seen from this table, in the conventional feed adjusting device M0,
When transporting the workpiece W with a minute feed of about 6 mm or less,
Before the feed roller 1 secures the final feed amount, the work is actually fed large and returned to the end, and the work W is shaken and damages the work W.

The present invention has been made to solve the above-described problems, and provides a feed adjusting device for a press machine that can accurately feed a work without returning it even when feeding the work minutely, and can feed the work without damaging the work. The purpose is to do.

<Means for Solving the Problems> A feed adjusting device according to the present invention adjusts a rotation angle of the feed roller when rotating a feed roller for feeding a work, and feeds a press machine that adjusts a feed amount of the work. A roller lever extending radially outward in a substantially vertical direction from a rotation axis of the feed roller; reciprocatingly rotating at a fixed angle to be parallel to the rotation axis of the feed roller; A cam shaft disposed below, an arm extending radially outward in the substantially vertical direction from the cam shaft, and having a slide groove formed at a distal end in a longitudinal direction; and one end disposed in the slide groove of the arm. A joint in which the other end is pivotally attached to the roller lever; and a movable joint which is movable along a straight line connecting the axes of the cam shaft and the feed roller. Characterized in that it is configured to include a holding member defining an oscillation center position of the Jiyointorotsudo.

<Operation and Effect of the Invention> In the feed adjusting device according to the present invention, when the camshaft reciprocates, the arm extending from the camshaft reciprocates. Then, the guide rod having one end disposed in the slide groove of the arm swings about the swing center position held by the holding member. Then, the feed roller rotates through a predetermined angle via a roller lever connected to the other end of the joint guide.

Further, in the feed adjusting device according to the present invention, the connecting portion between the roller lever and the joint lever is not connected via a guide groove that is displaced unlike the conventional device. Therefore, for example, the connecting portion between the roller lever and the joint guide is set so that the work feed amount is set to zero,
Even if the swing center position of the joint
During the rotation of the camshaft, it is possible to always match those parts. Then, if the holding member is slightly raised, the rotation that returns during the feeding of the work is not generated,
The feed roller can be slightly rotated.

Therefore, in the feed adjusting device according to the present invention, even when the work is minutely fed, the work can be accurately sent without returning, and the work can be sent without being damaged.

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

As shown in FIG. 1, the feed adjusting device M1 according to the embodiment includes a feed roller 11 and a pressing roller 12, which pinch and feed the work W.

The feed roller 11 includes a rotating shaft 11a, and a predetermined position of the rotating shaft 11a is supported on a shaft frame Fd of the apparatus M1 with a bearing (not shown) interposed therebetween.
12a, and a predetermined position of the driven shaft 12a is held by the shaft frame Fu.

In the case of the embodiment, the feed roller 11 and the pressing roller 12 have a substantially half-cylindrical contact surface with the workpiece W, and are supported by support rods (not shown) extending from the shafts 11a and 12a. Supported.

When the feed roller 11 is conveying the work W, the shaft frame Fu moves the pressing roller 12 close to the feed roller 11, and the feed roller 11 rotates the work W in a direction opposite to the transfer direction. At this time, the pressing roller 12 is configured to move up and down by a predetermined cam mechanism so as to move away from the feed roller 11.

Further, the rotating shaft 11a and the driven shaft 12a are provided with gears 11b and 12b that mesh with each other. During the transfer of the work W, the driven shaft 12a is rotated by the rotation of the rotating shaft 11a. It is configured to be driven.

Then, a roller lever 14 extending substantially downward using a bolt 13 can be integrally rotated with the rotating shaft 11a,
Installed.

On the other hand, above the driven shaft 12a of the press roller 12, a cam shaft 15 parallel to the rotation shaft 11a of the feed roller 11 is supported by a bearing frame Fc of the device M1 using a bearing (not shown). I have. A cam follower 15a is fixed to the cam shaft 15, and a drum cam C to which rotation is transmitted from a crankshaft of a press (not shown) is in contact with the cam follower 15a. Then, the cam shaft 15 reciprocates at a fixed angle via the cam follower 15a by the rotation of the drum cam C.

As shown in FIGS. 1 and 2, an arm 17 extending substantially downward is integrally connected to the cam shaft 15 by using a bolt 16. The arm 17 is formed with an elongated slide groove 17a.

In the slide groove 17a, a slide block 18 movable along the longitudinal direction of the groove 17a is provided. The slide block 18 is provided with a pin 19 using a needle bearing (not shown). This pin
Reference numeral 19 denotes a nut (not shown) fixed to the upper end of the joint 20.

The joint 20 has a pin 19 and a slide block 18.
And the lower end thereof is connected to the tip of the roller lever 14 using the pin 21 at the lower end. The pin 21 is fixed to the back side of the roller lever 14 (not shown) with a needle bearing (not shown) interposed between the pin 21 and the joint 20.

On the front side of the joint 20, the joint
A holding member 22 that defines the center of swing of 20 is provided.
The holding member 22 has a shaft portion 22a protruding in a direction orthogonal to the joint introduction 20, and a concave groove 22b into which the joint 20 is slidably fitted.

The holding member 22 holds the shaft portion 22a on the support block 23 with a roller bearing (not shown) interposed. As shown in FIGS. 1 and 3, the support block 23 has an elongated hole 23a in the form of a vertically and horizontally long hole, an overhang 23b extending to the left and right sides at the lower part, and a female screw part 23c at the upper part. I have. The overhang portion 23b is a device
It is in contact with the guide rails 24 provided on the frame F of the M1 and the support block 23 is configured to be able to move up and down along the guide rail 24. The screw rod 25 is screwed into the female screw portion 23c. Therefore, when the screw rod 25 rotates in a predetermined direction, the support block 23 moves along the guide rails 24, 24, and the holding member 22 can be arranged at a predetermined position.

The screw rod 25 is connected to a pulse motor (not shown). By a predetermined operation of the pulse motor, the screw rod 25 is rotated in a predetermined direction in a predetermined direction, and the vertical position of the holding member 22 for regulating the position of the swing center of the joint introductory 20 can be adjusted.

Describing the operation of the feed adjusting device M1 of the embodiment, first, when the cam C rotates with the rotation of the crankshaft of the press machine (not shown), the camshaft 15 reciprocates by a predetermined angle via the cam follower 15a. Then, the arm 17 fixed to the cam shaft 15 also reciprocates by a predetermined angle.

When the arm 17 reciprocates, the slide groove 17a
While sliding the slide block 18 inside, the joint 20 swings about the portion held by the holding member 22.

Therefore, the lower end of the joint guide 20 is
, And the roller lever 14 reciprocally rotates, so that the feed roller 11 reciprocates a predetermined angle. At this time, when the pressing roller 12 is rotated by the cam mechanism (not shown) in the feed direction of the work W of the feed roller 11, the press roller 12 approaches the feed roller 11, and moves in a direction opposite to the feed direction of the work W of the feed roller 11. The workpiece W is intermittently fed to the rotating child of because it is away from the feed roller 11.

And if you want to increase the feed amount of the work W,
If the screw rod 25 is rotated in a predetermined direction by operating a pulse motor (not shown) and the holding member 22 is raised together with the support block 23, even if the reciprocating rotation angle of the cam shaft 15 is constant, the holding member
Since the distance from the swing center of the joint guide 20 held by 22 to the connecting portion with the roller lever 14 becomes longer, the feed amount can be increased.

Conversely, if you want to reduce the feed,
25 may be rotated in the reverse direction to lower the holding member 22 together with the support block 23 to reduce the distance from the swing center of the joint 20 to the connecting portion with the roller lever 14.

At this time, in the feed adjusting device M1 of the embodiment, the roller lever
The connecting portion between the 14 and the joint lever 20 (the portion where the pin 21 is provided) is not connected via a displaced guide groove as in the conventional device M0. Therefore, for example, the work W
In order to reduce the feed amount of the roller to zero, the connecting portion between the roller lever 14 and the jootrode 20 (the portion where the pin 21 is disposed) and the swing center position of the jootrode 20 (the shaft portion 22a of the holding member 22).
Center position), it is possible to always match those parts during the rotation of the camshaft 15.
Then, if the holding member 22 is slightly raised, the feed roller 11 does not rotate so as to return during the feeding of the workpiece W.
Can be slightly rotated.

Therefore, in the feed adjusting device M1 of the embodiment, the work W
The work W can be accurately sent without returning even when feeding the work W minutely, and the work W can be sent without being damaged.

In the embodiment, the cam shaft 15 is connected to the rotation shaft of the feed roller 11.
11a is shown above, but of course, the arm 17
The camshaft 15 may be arranged below the rotating shaft 11a if the joint guide 20 is arranged upside down.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a feed adjusting device showing one embodiment of the present invention, and FIG. 2 is a partial cross-sectional view of the same embodiment viewed from another direction. FIG. 3 is a partial sectional view of the same embodiment as seen from another direction, and FIG. 3 is a sectional view taken along line III-III of FIG. 1, FIG. Fig. 6 is a partial cross-sectional view of the conventional device, Figs. 6, 7, and 8 are diagrams each showing an outline of the operation of the conventional device. is there. 11 ... Feed roller, 11a ... Rotary shaft, 14 ... Roller lever, 15 ... Cam shaft, 17 ... Arm, 17a ... Slide groove, 18 ... Slide block, 20 ... Joytrode, 22 ... Hold Member, W …… Work, M1 …… Feed adjustment device.

Claims (1)

(57) [Claims] 1. When rotating a feed roller for feeding a work,
A feed adjusting device of a press for adjusting a rotation angle of the feed roller and adjusting a feed amount of the work, a roller lever extending radially outward in a substantially vertical direction from a rotation axis of the feed roller; A camshaft reciprocatingly rotating at an angle and disposed above or below the rotation axis as being parallel to the rotation axis of the feed roller; extending substantially radially outward in the vertical direction from the camshaft; An arm having a slide groove formed on the arm; a joint having one end disposed in the slide groove of the arm and the other end pivotally connected to the roller lever; and a mutual axis of the cam shaft and the feed roller. A holding member for holding the joint introductory so as to be movable on a straight line connecting the joints and defining a swing center position of the joint introductory. Feed adjusting device-less machine.