JPS5927952Y2 - Roll feed drive mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive mechanism for a press material feeding device that uses an indexing cam to feed a plate material intermittently.

In order to synchronize the timing of the intermittent feed of the material and the timing of the vertical movement of the press machine's mold, this type of feeding device conventionally extracts the driving force from the end of the press's crankshaft, but there are many problems with this method. There were three different methods as follows.

(a) As shown in Fig. 1, a tension pulley 6 is connected between a drive pulley 2 fixed to a press crankshaft 1 and an input shaft pulley 5 attached to an indexing cam manual shaft 4 on the roll feed 3 side. With belt 7 attached.

(b) As shown in FIG. 2, a timing belt 12 is placed between the drive pulley 9 fixed to the press crankshaft 8 and the fixed pulley 11 attached to the press frame 10, and the timing belt 12 is placed between the fixed pulley 11 and the roll feed 13 side. Index cam input shaft 1
4 are connected by a constant velocity joint 15.

(c) As shown in FIG. 3, a spline shaft 18 is provided which rotates via a press crank shaft 16 and a bevel gear 17,
An indexing cam input shaft 20 on the roll feed 19 side is spline-fitted onto the spline shaft 18.

In the case of (a), when the feeding device is replaced with a mold or the diameter of the feeding roll is changed, a timing error occurs due to the movement of the input shaft pulley and tension pulley when adjusting the feeding device up and down relative to the press, and this is corrected. Various efforts have been made to achieve this, but the mechanism becomes slow and complicated, and in the case of (b), there is no problem with timing correction associated with the above adjustment and no synchronization occurs, but the mechanism becomes complicated.

Similarly to case (b), in case (c) there is no problem with timing correction associated with the above adjustment, but there is a drawback that a bevel gear or the like is required to change the direction of rotation, making the mechanism complicated.

The present invention aims to eliminate these drawbacks and provide a roll feed drive mechanism that solves the problem of timing correction associated with adjusting the vertical movement of roll feed with a simple mechanism.

Referring to FIG. 4, which shows an embodiment of the present invention,
This mechanism consists of a drive pulley 2 fixed to a press crankshaft 21.
A timing belt 27 is installed between a human-powered shaft pulley 25 attached to the index cam input shaft 24 on the roll feed 23 side having vertical position adjustment and an idle pulley 26 of the same diameter fixed horizontally to the human-powered pulley 25. This is characterized in that the tension pulley 28 is provided between the drive pulley 22 and the input shaft pulley.

Next, when using this mechanism, the amount of synchronized change in the input shaft pulley 25 with respect to the rotation of the drive boot 22 fixed to the press crankshaft due to the vertical movement of the roll feed can be numerically explained with reference to FIG. 1, D=200
If mm xO=4oommY=50mm, △θ=
360X502/2yr X400X200=1.8
In other words, the amount of change in synchronization due to a movement of 100 mm between pulley position III→I-+II is only 1.8 degrees, which is an almost negligible value.

According to the present invention, there is an advantage that a drive mechanism that does not require synchronization adjustment can be constructed with a minimum number of pulleys without using complicated and expensive spline shafts, constant velocity joints, etc. as in the past.

[Brief explanation of the drawing]

Figures 1, 2, and 3 are simplified diagrams of a conventional roll feed drive mechanism, Figure 4 is a simplified diagram of a roll feed drive mechanism according to an embodiment of the present invention, and Figure 5 is a simplified diagram of a roll feed drive mechanism according to an embodiment of the present invention. FIG. 3 is a reference diagram for calculating the amount of change in synchronization of the input shaft pulley. 1 is a press crankshaft, 2 is a drive pulley, 3 is a roll feed, 4 is an indexing input shaft, 5 is a manual axis pulley, 6 is a tension pulley, 7 is a timing belt, 8 is a press crankshaft, 9 is a drive pulley, 10 is a press frame, 11
1 is a fixed pulley, 12 is a timing belt, 13 is a roll feed, 14 is an indexing cam input shaft, 15 is a constant velocity joint, 1
6 is a press crankshaft, 17 is a beher gear, 18 is a spline shaft, 19 is a roll feed, 20 is an indexing cam input shaft, 21 is a press crankshaft, 22 is a drive pulley, 23
is a roll feed, 24 is an indexing cam input shaft, 25 is a human power shaft, 26 is an idle pulley, 27 is a timing belt,
28 is a tension pulley, 29 is a feed roll, 30 is an index cam output shaft, 31 is a feed roll, 32 is an index cam output shaft, 33 is a feed roll, 34 is an index cam output shaft, 35 is a feed roll, 36 is the indexing cam output shaft.

Claims (1)

[Scope of utility model registration request] In a roll feed with vertical position adjustment, a fixed idle pool of the same diameter is provided horizontally to the manual shaft pulley, and a tension pulley is provided between the input shaft pulley and the drive pulley so that the horizontal axis of the idle pulley is A roll feed drive mechanism using a timing belt, characterized by having a mechanism for distributing and raising and lowering.