JPS6331796Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a feed stroke adjustment device for a transfer feeder that allows the feed stroke to be adjusted according to the size of the blank, the number of processes, etc.

The transfer feeder conventionally installed in transfer presses receives power from the press body through a mechanical interlocking mechanism, and as a result, the feed stroke cannot be easily adjusted, making it difficult to adjust the applicable blank size and number of processes. There was a problem with the manufacturing limit.

This invention was made with the aim of improving such problems, and by providing a stroke adjustment device for transfer feeders that allows the feed stroke to be easily adjusted, it is possible to expand the range of applicable blank sizes and number of processes. This is what we are trying to achieve.

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

FIG. 1 shows a transfer feeder installed in a transfer press (not shown), which has a pair of transfer bars 2 along the blank conveyance direction (arrow A). These transfer bars 2 are a lift carrier 5 which is moved up and down by a lift cylinder 3 via a rack and pinion mechanism 4, and a clamp carrier 7 which moves the lift carrier 5 in the approaching and separating directions by a clamp cylinder 6 via a rack and pinion mechanism 15. It is located on the top and is moved up and down and moved toward and away from each other by these carriers 5 and 7, and
A feed mechanism 8 is installed on the blank delivery side of each transfer bar 2. The above feed mechanism 8
has a camshaft 11 driven by a feed motor 9 via a bevel box 10 and a gear 10a, and each transfer bar 2 is connected to this camshaft 11.
A cam 16 is provided for each. Feed levers 12 whose lower ends are pivotally supported are in contact with the cam 16, and the tips of these feed levers 12 are connected to feed carriers 14 via links 13, and as each lever 12 rotates, pins are attached to the feed carriers 14. The coupled transfer bar 2 is configured to be reciprocated in the blank transport direction A together with the feed carrier 14.

The camshaft 11 is provided with the feed stroke adjusting device of this invention. As shown in FIG. 2, in the above adjustment device, each cam 16 has a cylinder 17 that is movable only in the axial direction with respect to the camshaft 11.
provided for each. A pressure chamber 18 is provided between the cylinder 17 and the camshaft 11, and the pressure chamber 18 is divided into two chambers 18 ₁ and 18 ₂ by a piston 19 fixed to the camshaft 11 side. , one end side of oil passages 11a and 11b formed in the camshaft 11 are communicated with each of the chambers 18 ₁ and 18 ₂ . The other end of each oil passage 11a, 11b is connected to a hydraulic power source (not shown) via a rotary joint 20 provided at both ends of the camshaft 11, and from this hydraulic power source to one of the pressure chambers 18 ₁₈₁ . When hydraulic pressure is supplied, each cylinder 17 moves away from each other,
In addition, when hydraulic pressure is supplied to chamber 18 ₂ , each cylinder 17
are moved in the direction of approaching each other.

On the other hand, cams 16 ₁ and 16 ₂ having different diameters are attached adjacent to each other on the outer periphery of each cylinder 17 . As shown in FIG. 3, these cams 16 ₁ and 16 ₂ are configured to have different radii from the center 0 to the maximum diameter, and these cams 16 ₁ and 16 ₂
By selecting , the feed stroke becomes 2.
It can be adjusted in stages.

As described in detail above, this invention includes a cylinder 17 that is hydraulically movable in the axial direction relative to the camshaft 11, and a plurality of cams 16 ₁ and 16 ₂ having different maximum diameters provided on this cylinder 17. Since these cams 16 ₁ and 16 ₂ are brought into selective contact with the feed lever 12, the feed stroke of each transfer lever 2 can be adjusted in multiple stages within the range of the number of cams 16 ₁ and 16 ₂ . Become. As a result, the conventionally fixed feed stroke can be set arbitrarily depending on the size of the blank and the number of processing steps, so the range of applicable blank sizes and number of processing steps can be greatly expanded. In addition, a cylinder installed on the camshaft moves multiple cams in the axial direction to select the cam to be used, allowing smooth cam movement and the ability to swing for each cam, unlike conventional models. Since there is no need to provide a lever, the structure is simple and can be provided at low cost.

Furthermore, the feed levers connected to the front and rear transfer levers are made to swing directly.
High synchronization accuracy can be achieved without the occurrence of synchronization deviations due to twisting of the rotary shaft, unlike in the case of conventional transmission via a rotary shaft.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention, with FIG. 1 being an overall view, FIG. 2 being a sectional view of this device, and FIG. 3 being a side view of the same. 2 is a transfer lever, 11 is a camshaft, 12 is a feed lever, 13 is a link, 14 is a feed carrier, 16 ₁ and 16 ₂ are cams, and 17 is a cylinder.

Claims (1)

[Scope of utility model registration request] Transfer levers 2 arranged in parallel in the conveying direction of the blank are connected to a feed carrier 14 by pins, and the feed carrier 14 is connected via a link 13 to a feed lever 12 that is swung by a cam 16. 11 is provided with a cylinder 17 that is movable only in the axial direction by hydraulic pressure, and this cylinder 17 is provided with a plurality of types of cams 16 ₁ and 16 ₂ having different maximum diameters, and these cams 16 ₁ and 16 ₂ are selectively moved as described above. A feed stroke adjustment device for a transfer feeder, characterized in that the feed stroke is adjusted by bringing it into contact with a feed lever 12.