JPS5935310Y2 - Transfer press equipment - Google Patents

Description

[Detailed description of the invention] This invention relates to a transfer press device, and is particularly applicable when a failure of the movement detection means (limit switch), misclamping of pressed parts, malfunction of the actuator that activates the movement detection means, etc. , which detects this and stops the press equipment, and at the same time turns on the warning light at the faulty location, thereby saving time in finding the faulty location, shortening and simplifying repair time, and improving work efficiency. It is.

Conventional transfer press equipment automatically stops when a failure occurs in the movement detection means or the actuator that activates the movement detection means, but the failure location is not displayed, and in particular, it is difficult to detect the failure location of the movement detection means. It took a long time to do that.

In other words, in conventional press equipment, the wiring circuits are connected in series, so detection with a tester is impossible.In particular, the movement detection means shares A and B contacts, so it is necessary to inspect the internal parts. It can only be discovered by an electrician,
Furthermore, there is a drawback in that all parts, including incorrect clamping of processed parts and malfunction of actuators, must be inspected.

In view of these problems, the present invention provides a cam in the actuator that urges the claws for clamping the pressed parts in the direction of closing each other, and the cam opens and closes the switch constituting the movement detection means. A transfer press device that detects a condition in which the jaws do not properly clamp the workpiece due to opening and closing operations (□scram) or malfunction of the actuator, stops the press device, and lights up a neon lamp as an alarm. This is a proposal.

The configuration of the present invention will be explained below based on examples.

First of all, the transfer press device, as shown in the outline in Fig. 1, has a plurality of press molds 24, 25, 26° 27 arranged in parallel, and a pair of feed rods 5.5 are arranged on both sides of the press molds. A plurality of pairs of pawls 6 are provided facing each other on the inside, and the feed rods 5, 5 are mutually moved by a combination of reciprocating motion of the molds 24 to 2T in parallel directions and an opening/closing motion that reduces/enlarges the spacing between the pawls 60. It performs a rectangular movement in the opposite direction, and sequentially transfers the pressed parts to the adjacent molds.

As shown in FIG. 2, the winter melon 6 is connected to the rod 7 by a pair of bearings 11. 11 and is slidably supported on the feed rod 5.

A cam 8 having a flat portion 8a and a recess 8b on this rod 7.
The actuator 2 is mounted externally and fixed with bolts 9, and a compression spring 10 is interposed between it and the above-mentioned one bearing 11.
0, and the spring 10 urges the pawls 6.6 toward each other to exert an appropriate elastic engagement force on the workpiece 15.

Then, along the actuator 20 on one side, the feed rod 5
A movement detecting means 1 having a switch is fixed thereon, and a roller 1c is supported on its movable piece and is adapted to abut against the cam 8.

The movement detecting means 1 includes a pair of contacts that open and close oppositely to each other, as will be described later. A cord 14 is connected to this contact, and the end of the cord 14 is connected to the alarm 2 via a connector 13.

This connector 13 is equipped with a pin and a cap nut on one side of the cord 14 and the alarm 2, and a pin hole and a male thread on the other side. The structure is such that the cap nut is screwed into the male thread to prevent the connection from coming off.

The alarm device 2 is equipped with single-effect non-online laps 2a and 2b, which are connected via cords 3a and 3b to movement detection sensors respectively arranged in each of the press molds 24 to 27 as shown in FIG. Contacts 1a and lb of means 1 are connected in parallel with each other.

That is, the terminal conductor 30 of the AC power supply 29 may also be connected to the fuse 1.
Connection cords 3a and 3b are pulled out through the cords 6, and the relay coils/I/4b and the neon lamps 2b arranged for each winter melon 6 are connected in series to the other power terminal conductor 31 of the power source 29 by the cords 3b. Ru.

Similarly, by code 3a, relay coil 4a and winter melon 6
The neon lamps 2a arranged in each case are connected in series to a terminal conductor 31.

The pair of contacts 1a and 1b provided in the movement detection means 1 described above are configured so that when one closes, the other opens, and the contact 1a is connected in parallel with each neon lamp 2b, and the contact 1a is connected in parallel with each neon lamp 2b. It is connected in parallel with each neon lamp 2a.

When both relay coils 4a and 4b are in a non-excited state, the press device is stopped by contacts not shown.

Next, to explain the normal operation of the press device according to the present invention, in the unclamped state where the winter melons 6 are open to each other as shown in FIG. As shown in FIG.
1b is in the state shown by the solid line in FIG.

That is, the contact 1b is closed and the contact 1a is open.

Therefore, the ray coil 4b is in an excited state and the press device continues to operate.

When the press forming process is completed and the upper die is raised, the feed rod 5 moves in the direction of the arrow from the state shown in FIG.

When the claws 6 collide with the workpiece 15 by the movement of the feed rods 5 toward each other, the actuator 20 is pushed back while compressing the spring 10, and this reaction force is applied as a force to clamp the workpiece 15.

According to the return movement of the actuator 20, the roller 1c rides on the flat part 8a, and the contact 1a of the movement detection means 1 closes and the contact 1b opens, as shown by the broken line in FIG.

Therefore, the relay coil /l'4b is in a non-excited state, the relay coil 4a is in an energized state, and the press device continues to operate.

Neon lamp 2a has high resistance, so contact 1a
A current flows through the lamp 2a, and the potential difference between both ends of the lamp 2a is low, so none of the neon lamps 2a lights up.

When the workpiece 15 is held between the pair of claws 6 in this way, the feed rod 5 moves in the direction of the arrow (right) from the state shown in b, and the workpiece 15 is transferred to the adjacent mold, and the workpiece 15 is transferred to the adjacent mold. state.

Then, the feed rods 5 are moved outwardly away from each other and are in the state d.

Here, the press die is lowered again, and the workpiece 15 is press-formed.

During this time, the feed rod 5 moves in the "notch" (to the left) direction and enters the state a.

The feed rods 5 approach each other again for the workpieces that have been press-worked, and the claws 6 repeat the clamping and transfer of the workpieces, and the workpieces 15 are sequentially transferred to the molds 24 and 27, and the workpieces 15 are sequentially transferred to the molds 24 and 27. The molding process is applied.

Next, if the workpiece 15 is not properly clamped by the jaws 6 during the operation of clamping the workpiece 15 in the clamped state of the claws 6, that is, the process from state a to state C, and falls off, the actuator 20 Since it is not pushed back by the parts, the roller 1c remains depressed into the recess 8b of the cam.

Therefore, the contact 1a of the unclamped claw of the workpiece does not close, the neon lamp 2a lights up, and the excitation current of the relay coil 4a becomes small.

It becomes substantially de-energized, and the relay contacts (not shown) cannot be activated.

In this way, both the coils 4a and 4b become de-energized, and the press apparatus is stopped.

From the lighting of the neon lamp 2b indicating an abnormal condition, the on-site operator of the press machine can easily discover that the corresponding pawl 6 is in an abnormal condition.

In this case, if the neon lamp 2a is lit even though the workpiece 15 is properly clamped, the bolt 9 fixing the actuator 20 may become loose.
Or, the cause is a malfunction of the movable piece including the roller 1C of the movement detection means 1 or a contact failure of the contacts 1a and 1b. In this case, the actuator 20 must be replaced or the connector 13 must be removed to detect the movement. It is only necessary to replace the means 1, and such a thing can be easily done by an on-site worker of the press machine, even if he is not an electrical engineer.

Next, in the unclamped state of the claw 6, that is, in the process from C to d to the state a in FIG. 1, the actuator 20
Or if the movement detection means 1 malfunctions, the actuator 20 is projected by the spring 10 and the roller 1
Contact point 1 where c should fall into the recess 8b of the cam and close it
b remains open, so the neon lamp 2b lights up.

Then, the current flowing through the relay coil 4b decreases, resulting in a substantially non-excited state.

On the other hand, even if the contact 1a paired with the contact 1b remains closed, the other contact 1a is open, so the relay coil 4a is also de-energized.

Therefore, both relay coils 4a and 4b are de-energized and the movement of the press device is stopped.

Note that even if one contact 1b is closed, if the remaining contacts 1b are open, the corresponding neon lamps 2b will not light up.

Each neon lamp 2b has a high resistance value, and lights up when one or two are connected to a power source, and does not light up when three or more neon lamps are connected to a power source.

In the process of unclamping the claws 6, if the workpiece 15 is not released for some reason and the roller 1c remains on the flat part 8a of the cam, or even if the actuator 20 protrudes, the movement detection means 1 may not be released. Even when a malfunction occurs, it operates in the same manner and the neon lamp 2a lights up.

As explained above, the present invention is a transfer press device equipped with a pair of feed rods having a plurality of pairs of claws for clamping a workpiece, and is provided with an actuator 20 that applies a spring force to clamp the workpiece to the winter melon. A movement detection means 1 having a pair of contacts is actuated by a cam configured in an actuator, and this movement detection means controls a circuit of a neon lamp as an alarm connected in parallel with each of the contacts, and the nail is activated. The neon lamp is turned on due to malfunction or malfunction of the actuator and movement detection means, and the energization circuit that drives the press device is cut off when the relay coil inserted in the neon lamp's energization circuit is de-energized. Therefore, the on-site worker, even if he or she is not an electrician, can quickly find the abnormality, eliminate the abnormal condition of the machined part, or replace the movement detection means to return to work. An excellent effect can be obtained in that the workability of the machine can be greatly improved.

If the colors of the neon rungs 2a and 2b are considered separately, the scope of investigating the cause and location of malfunction becomes even narrower.

In the above-mentioned embodiment, the neon lamp lights up when there is a failure in one or two places, but if there are failures in many places at the same time, even if the operation of the press equipment is automatically stopped, the failure place is not displayed. The neon lamp displayed does not light up.

In order to eliminate this inconvenience, each relay coil 4
If the number of neon lamps 2a, 2b and contacts 1a, 1b connected to a, 4b is reduced, for example, a detection circuit is provided every 4 to 5, if a plurality of such detection circuits are provided, failures can be avoided. It becomes easy to find the location.

However, since it is extremely rare for failures to occur in multiple locations at the same time, in practice, the ability to display up to two locations is sufficient to achieve the purpose.

The neon lamp used as the alarm mentioned above has a very high resistance value, so when it is lit, it automatically de-energizes the relay coil, and also protects against vibrations received from the press equipment. This is advantageous because there is no risk of the bulb breaking out like with ordinary tungsten light bulbs.

[Brief explanation of the drawing]

Fig. 1 is a plan view illustrating the general structure and operation of the transfer press device, Fig. 2 is a plan view showing an enlarged view of the main parts of the transfer press, and Fig. 3 is a plan view showing the operating state of the main parts. FIG. 4 is a circuit diagram. 1...Movement detection means, 1a, 1b...
Contact, 2... Alarm, 2 a * 2 b...
...Neon lamp, 4a. 4b...Relay coil, 5...Feed rod, 6...Claw, 8...Cam, 20...
...actuator.

Claims (2)

[Scope of utility model registration request] (1) Equipped with a pair of feed rods arranged in parallel on both sides of a plurality of press dies arranged in parallel, and a plurality of pairs of claws attached opposite to the feed rods for clamping pressed parts. By the rectangular movement of the pair of feed rods in opposite directions,
In each transfer/brake device in which pressed parts are sequentially moved to adjacent molds, there is provided an actuator that urges each pair of pawls by a spring in the direction of clamping the processed part, and a fixed support for each of the actuators. a cam which reciprocates with the pawl, and a first cam which drives an electrical circuit which stops the transfer press when both are de-energized. a second relay, and a first relay which is opened and closed in opposite directions by each of the cams. a second contact point, and each of the first contact points;
A circuit for detecting malfunction of the actuator by connecting the contacts and the coil of the first relay in series with each other to a power source; and a circuit connecting each of the second contacts and the coil of the second relay to the power source in series with each other. a circuit for detecting malfunction of the pawl; A transfer press device comprising a high resistance alarm device connected in parallel to each of the second contacts. (2) To detect malfunction of the actuator by connecting both terminals of the first contact and the second contact through a connector consisting of a member having a pin and a cap nut, and a member having a pin hole and a male thread. The transfer press apparatus according to claim 1, which is connected to a circuit for detecting malfunction of the claw and a circuit for detecting malfunction of the claw.