JPH0240047Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to an arm speed reduction device suitable for alleviating the impact of an arm in an autopaster device.

[Background of the idea]

Conventional autopastor devices used air cylinders to power the paster arm up and down.
There is a sudden change in speed when starting and stopping the paster arm vertical movement, and no device is provided to alleviate the speed change. Therefore, rapid speed changes when starting and stopping the paster arm affect tension fluctuations in the running film, causing the film to expand and contract, causing printing defects.

[Purpose of invention]

The present invention aims to provide a speed reduction device capable of alleviating rapid speed fluctuations during starting and stopping of the paster arm in the conventional autopastor device as described above.

[Summary of the idea]

In order to achieve the above object, the present invention is equipped with a phototube switch for deceleration and stop on the paper roll side of the paster arm, and a limit switch for deceleration and stop on the frame above the support part of the paster arm. Each of the phototube switches and each limit switch is connected to a control device in which a deceleration circuit and a stop circuit have been incorporated in advance, and the control device operates the power cylinder to reduce the sudden speed at the time of starting and stopping the power cylinder. This is designed to moderate speed changes.

[Example of idea]

Next, one embodiment of the present invention will be explained with reference to FIGS. 1 to 4.

FIG. 1 is a side view showing the overall configuration of an autopaster device to which the present invention is applied, in which 1 is the old paper roll, 2 is the new paper roll, 3 is a spider arm to which these paper rolls 1 and 2 are attached, and 4 is the spider arm. The stand supports the arm 3, and together constitutes a web support device. In contrast to this web support device, the infeed device is composed of a paster arm 5 having a paster roller 6, and a frame 13 that rotatably supports the upper part of the paster arm 5 and the lever of the power cylinder 7 at the same location. ing.

In the present invention, as shown in FIG. 2, the paster arm 5 of the infeed device is provided with a deceleration phototube switch 9 and a stop phototube switch 10, and as shown in FIG. A deceleration limit switch 11 and a stop limit switch 12 are installed on the frame 13,
These phototube switches 9 and 10 and limit switches 11 and 12 are connected to a control device 8. This control device 8 has a slow start circuit and a deceleration circuit incorporated in advance.

Since the structure is as described above, when the activation push button switch of the power cylinder 7 is pressed, the control device 8 is activated.
The paster arm 5 gradually starts and continues to rise at a constant speed by the slow start circuit, and when the new web 2 blocks the light from the deceleration phototube switch 9 as shown in FIG. 2, a deceleration signal is output and control is performed. The power cylinder 7 is decelerated by the deceleration circuit of the device 8, and when the light from the stop phototube switch 10 is blocked by the new web 2, a stop signal is output, the power cylinder 7 stops, and the paster arm 5 also stops. .

FIG. 3 shows the paster arm 5 when it is lowered. When the lowering pushbutton switch of the power cylinder 7 is pressed, the paster arm 5 starts gradually and steadily by the slow start circuit of the control device 8. The pacer arm 5 continues to descend with increasing speed.
When the paster arm 5 comes into contact with the deceleration limit switch 11, the power cylinder 7 is decelerated by the deceleration circuit of the control device 8, and when the paster arm 5 comes into contact with the stop limit switch 12, the power cylinder 7 stops, and the paster arm 5 It is also starting to stop.

FIG. 4 shows a velocity diagram when the paster arm 5 is raised and lowered. In FIG. 4, the vertical axis shows speed, and the horizontal axis shows time. As is clear from this figure, when the paster arm 5 starts, the speed gradually increases over time and reaches a constant speed, and when it stops, it gradually decreases from the constant speed and comes to a stopped state. , there are no sudden speed fluctuations in the paster arm.

[Effect of idea]

As described above, according to the arm deceleration device in the autopaster device of the present invention, it is possible to alleviate sudden speed fluctuations when starting and stopping the paster arm, and it is possible to eliminate causes of printing defects. effective.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram, FIG. 2 is a side view showing an example of raising the paster arm according to the present invention, FIG. FIG. 4 is a velocity diagram of the paster arm in FIG. 3 and FIG. 5... Paster arm, 6... Paster roller, 7... Power cylinder, 8... Control device, 9
... Deceleration phototube switch, 10... Stop phototube switch, 11... Deceleration limit switch,
12... Limit switch for stopping.

Claims (1)

[Scope of utility model registration request] a paper roll support device, a paster arm rotatably supported by a frame attached to the paper roll support device and guides the paper roll, a power cylinder fixed to the frame, and a power cylinder fixed to the upper end of the paster arm; In an autopaster device comprising a lever rotatably connected to the power cylinder, a phototube switch for deceleration and stop is provided on the side of the paster arm facing the paper roll, and a paster arm of the frame is provided with a phototube switch for deceleration and stop. A limit switch for deceleration and a stop is installed above the support part, and each of the phototube switches and each limit switch is connected to a control device in which a deceleration circuit and a stop circuit are incorporated in advance, and the power cylinder is operated by the control device. An arm deceleration device for an autopaster device, characterized in that the arm deceleration device is adapted to reduce the impact when starting and stopping a power cylinder.