JPH0530819Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a device for detecting two plates in a transfer press.

(Prior art) A transfer press has a plurality of molds arranged in parallel, two feed bars are provided in parallel to each mold, and each feed bar is provided with a plurality of pairs of fingers facing inward, and the feed bars are By driving, each finger grips the processed product and sequentially transports it to the mold, and the finished product is manufactured through multiple processing steps. Furthermore, although the plates are fed from the plate supply device, if two or more plates are fed at the same time or if the plates cannot be fed due to misgrip, this may cause accidents such as damage to the mold.

On the other hand, if there is a misgrip during the conveyance of the plate material (processed product), it overlaps with the next plate material to be sent, resulting in two plates being supplied, and in this case. It will also damage the mold.

For this reason, in transfer presses, all fingers are equipped with a misgrip detection device to check for misgrip, and a two-plate detection device is used to check whether only one plate is being fed from the plate supply device. When these devices detect an abnormality, the press is immediately stopped.

In the prior art, the two plate detection device is installed between the plate supply device or the plate supply device and the press machine, and the two plate detection device and the misgrip detection device are installed as completely separate devices. .

For this reason, in the conventional technology, it is necessary to incorporate time for inspection using a two-plate detection device during the press cycle, which poses problems such as restrictions on processing time.

(Problem to be solved by the invention) The present invention provides a plate material detection mechanism that has both a two-sheet detection function and a misgrip detection function on the fingers that first grip the plate material supplied from the plate material supply device. The purpose is to provide a two-sheet detection device.

(Means for solving the problem) The means for solving the problem in this invention are as follows:
In a transfer feeder that has two feed bars, each feed bar is provided with a plurality of pairs of fingers facing inward, and each finger sequentially conveys the workpiece, the plate material supplied from the plate material supply device is first transferred. If the detected value of the plate material held by the fingers is within the set range value, it is detected that there is one plate material, and when the detected value is above the set range value, it is detected that there are two or more plate materials. The present invention is characterized in that it is provided with a plate material detection mechanism that detects a misgrip of the plate material when the detected value is below a set range value, and that the other fingers are provided with misgrip detection mechanisms.

(Function) When the plate material supplied from the plate material supply device is held between the first fingers 2, the plate material detection mechanism 7
It is determined whether there is only one plate material or whether there is a misgrip.

(Example) Fig. 1 is a plan view of the device of the present invention, and Fig. 2 is an explanatory diagram of the operation of the detection switch when a material is clamped using the present invention.

In Fig. 1, the feed bar 1 is parallel to the 2
A plurality of pairs of fingers 2, 3, and 4 are provided in parallel to hold the plate material inwardly using a book stick. The plate material 5 is supplied from the plate material supply device, and is fed to the position A by the vacuum cup 6, and then sequentially moved to B, C, and D by the operation of the feed bar 1.
It is designed to be transported to the position of

Among the above-mentioned fingers, the finger 2 that first grips the plate upon receiving the plate, that is, the finger 2 provided near the end of the feed bar 1 (the left end in the drawing), has a plate that detects two pieces and detects a misgrip. A detection mechanism 7 is provided.
Further, the other fingers 3 and 4 are provided with misgrip detection switches 8. Note that 9 is a contact 9 of the misgrip detection switch 8.

The plate detection mechanism 7 inspects whether there is only one plate 5 or whether there is a misgrip,
Further, the misgrip detection switch 8 checks whether the plate material 5 is being clamped.

Incidentally, it is sufficient that the plate material detection mechanism 7 and the misgrip detection switch 8 are both installed on one finger.

Further, the plate material detection mechanism 7 is a proximity switch, and the proximity switch may be of any type, such as a magnetic action or an electric current action, as shown in FIG.
If the detected value of the plate material held by the fingers is within the set range value from a to b, it is correctly detected that there is one plate material, and if the detected value is greater than the set value b, there are two or more plates. is detected, and furthermore, if the detected value is less than a set value a, it is detected that the plate material is not clamped.

The embodiment has the above-mentioned structure, and first, when the feed bar 1 makes a return movement and clamps the plate 5 at the supply position A of the plate supplied from the plate supply device, is it possible to clamp only one plate at that position? The plate material detection mechanism 7 determines whether or not this is the case. If it detects that there is only one plate, the press will continue to operate, but if it detects that there are two plates or that the plate has been gripped incorrectly, the press will immediately stop operating to prevent accidents. do.

On the other hand, the misgrip detection switch 8 determines whether or not the plate material 5 being conveyed is being correctly gripped.

In the embodiment, a proximity switch was used as the plate material detection mechanism, but two limit switches may be used instead of the proximity switch. In this case,
One is for detecting no plate material and one plate, and the other is for detecting two or more plates, so that the same effect as a proximity switch can be achieved.

(Effects of the invention) In the present invention, a plate detection mechanism having a function of detecting two plates and a misgrip detection function is provided on the fingers that first clamp the plate supplied from the plate supply device. Since the detection mechanism can detect two sheets and misgrip at the same time, there is no need for two detection devices for detecting two sheets and misgrip as in the past. Since there is no need to incorporate time for detection, there is an effect that there is no restriction on processing time.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the device of the present invention installed in a transfer feeder, and FIG. 2 is an explanatory diagram showing the setting level of the plate detection mechanism. 1... Feed bar, 2, 3, 4... Finger, 5... Board material, 6... Bakyum cup, 7...
...Plate detection mechanism, 8...Miss grip detection switch, 9...Contactor.

Claims (1)

[Scope of utility model registration request] In a transfer feeder that has two feed bars, each feed bar is provided with a plurality of pairs of fingers facing inward, and each finger sequentially conveys the workpiece, the plate material supplied from the plate material supply device is first transferred. If the detected value of the plate material held by the fingers is within the set range value, it is detected that there is one plate material, and when the detected value is above the set range value, it is detected that there are two or more plate materials. In a transfer press, the transfer press is characterized in that it is provided with a plate material detection mechanism that detects a misgrip of the plate material when the detected value is below a set range value, and that the other fingers are provided with a misgrip detection mechanism. Two plate detection device.