JPH077030Y2 - Tool intermediate stop device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] At the end of machining, an actuator released from being moved up and down according to a predetermined machining procedure descends due to its own weight of a tool holder fixed to itself. In order to prevent the tool holder from dropping, the tool holder is provided with a projection drive section provided as a tool intermediate stop device for intermediately stopping the tool and a projection section that is advanced and retracted from the tool drive section, and a projection receiving groove is provided in the tool holder to drive the projection. The tool holder is prevented from falling by locking the tool holder by the projection protruding from the part to the projection receiving groove, so there is no need to provide a tool holder drop prevention device separately from the tool intermediate stop device. The device can be simplified.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool intermediate stop device for intermediately stopping a tool for processing a workpiece, and more specifically, for preventing a tool holder holding the tool from dropping in the tool intermediate stop device. The present invention relates to a tool intermediate stop device having a function.

When sequentially processing a workpiece with a tool that processes the workpiece, set the next unprocessed workpiece under the tool from the processed workpiece (or set the tool itself to the next workpiece). In order to move the tool once, the tool needs to be temporarily stopped in order to separate the tool from the machined workpiece and temporarily put the tool in a standby state.

In addition, it is necessary to prevent the tool holder from falling due to the weight of the tool holder that holds the tool and is fixed to the actuator, which is caused by the actuator, which has been stopped at the end of processing, to descend.

[Conventional technology]

2. Description of the Related Art Conventionally, there is a device as shown in FIG. 5 as a device for intermediate stopping of a tool and preventing a tool holder from falling. In this figure, a tool holder 1 holds a tool 5 for processing a workpiece 9 and is fixed to an actuator 6 which is moved up and down by an actuator drive unit 8 in response to a control signal from a control unit 7. The tool holder 1 is provided with a pair of protrusions 2 and a protrusion drive unit 3 and a pair of protrusions 2'and a protrusion drive unit 3 ', which are adjacent to each other. As a result, the protrusion insertion / removal portion 3 provided in the tool holder 1 protrudes the protrusion 2 according to the output signal from the control 7 and abuts on a part of the tool holder 1 to stop the tool 5 in the middle.

In addition, when the actuator 6 that has been stopped at the end of processing descends due to the weight of the tool holder (this means, for example, when the actuator is driven by air, when the air main plug is closed and the drive by air is stopped). The projection drive section 3'provided on the tool holder 1 is projected by the output signal from the control 7 and receives a part of the tool holder 1 which has descended together with the actuator 6 to receive the tool holder. This is to prevent the fall of 1. It goes without saying that if the tool holder 1 falls, the tool 5 breaks the work piece 9.

[Problems to be solved by the device]

In the above-mentioned device for intermediate stop of tool and tool holder fall prevention device, it is necessary to separately provide a device for intermediate tool stop and tool holder fall prevention device. Is limited. In addition, the provision of separate devices for the tool intermediate stop and the tool holder drop prevention causes a problem of high cost.

The present invention was made in order to solve the above problems, and based on the conventional tool intermediate stop device,
It is an object of the present invention to provide a low-priced tool intermediate stop device that also has a tool holder drop prevention function.

[Means for Solving the Problems]

FIG. 1 is a view showing the principle configuration of a tool intermediate stop device according to the present invention. In the figure, reference numeral 1 denotes a tool holder, which holds a tool 5 for processing a workpiece 9 and is fixed to an actuator 6 which is vertically moved by an actuator driving unit 8. This tool holder 1 is provided with a projection receiving groove 4, and a projection driving portion 3 provided in the vicinity of the projection receiving groove 4 projects a projection 2 into the projection receiving groove 4. Further, the protrusion 2 contacts a part of the tool holder 1. The protrusion drive unit 3 moves the protrusion 2 forward and backward according to the output signal from the control unit 7. The control unit 7 also controls the vertical movement of the actuator 6 in the actuator drive unit 8.

[Action]

According to the present invention, the tool holder 1 makes an intermediate stop of the tool holder 1 by abutting the projection 2 projected from the projection driving unit 3, and the projection driving unit 3 causes the projection 2 to project into the projection receiving groove 4.
The tool holder 1 is prevented from falling by being projected.

FIG. 2 is a diagram showing the operation of FIG. 1, in which the intermediate stop state shows the intermediate stop state of the tool holder 1, and the rest state shows the drop prevention state of the tool holder 1. In the figure, when the tool holder 1 is to be stopped intermediately, an intermediate stop signal from the controller 7 causes the protrusion 2 to protrude from the protrusion drive unit 3, and the protrusion 2 and the controller 7 drive the actuator. The tool holder 1 is stopped by contacting a part of the tool holder 1 that has been lifted via the portion 8 and the actuator 6, and is held in an intermediate stopped state (see state A). Subsequent machining work of the tool 5 is the work piece 9
This is performed by moving the tool holder 1 between the and the protrusion 2.

Next, when the machining operation by the tool 5 is stopped, the protrusion drive unit 3 retracts the protrusion 2 and the actuator drive unit 8 causes the actuator 6 by the stop signal from the control unit 7.
The tool 5 is pulled up via. After pulling up, control unit 7
The vertical movement of the actuator 6 by the actuator drive unit 8 is stopped by the end signal from the actuator 6 (this ends the machining work), and the actuator 6 is not driven and controlled.
Begins to fall. At this time, the projection drive unit 3 projects the projection 2 in response to a fall prevention signal from the control unit 7, and the projection 2 that is projected comes into contact with the upper wall of the projection receiving groove 4 provided in the tool holder 1, It prevents the tool holder 1 from dropping due to its own weight (see state B). by this,
By providing the tool holder 1 with the projection receiving groove 4, the projection portion 2 and the projection driving portion 3 for the intermediate stop of the tool holder 1 can also function as the fall prevention of the tool holder 1, thus simplifying the apparatus. Can be realized.

[Embodiment] FIG. 3 is a view showing an embodiment of the present invention. In this embodiment, a part of the tool holder 1 comes into contact with the actuator 20 projected from the air cylinder 30 to stop the tool holder 1 in the middle, and the actuator 20 is provided from the air cylinder 30 to the projection receiving groove provided in the tool holder 1. The protrusion of the tool holder 1 prevents the tool holder 1 from falling.

The details will be described below. In this figure, the tool holder 1
Holds the tool 5 and is fixed to an actuator 6 that moves up and down by an actuator drive unit 8.
The tool holder 1 is provided with a projection receiving groove 4, and an air cylinder 30 is installed as a projection driving unit 3 in the vicinity of the projection receiving groove 4. The projection receiving groove 4 is provided by cutting the tool holder 1, for example. The air cylinder 30 is a retractable single-action air cylinder incorporating the actuator 20 that forms the protrusion 2. This actuator 20 retracts when the solenoid valve 31 turns off, and the solenoid valve 31
When the solenoid valve 31 is turned on or the supply air goes down when the solenoid valve 31 is turned off, it sticks out.

The actuator drive unit 8 includes an air cylinder 80, a solenoid valve 81, an introduction pipe 83, introduction / exhaust pipes 83, 84 and magnetic sensors 87, 88, 89, and moves the actuator 6 up and down. Solenoid valve 31,8
1 is on / off controlled by the sequence controller 70 as the control unit 7. In the introduction / exhaust pipes 83, 84, when the solenoid valve 81 is turned off, the introduction / exhaust pipe 83 becomes the introduction pipe, and the introduction / exhaust pipe 84 becomes the exhaust pipe, and when the solenoid valve 81 is turned on, the introduction / exhaust pipe 83 becomes the exhaust pipe. In addition, the introduction / exhaust pipe 84 becomes the introduction pipe to change the direction of introducing and discharging the air to move the actuator 6 up and down. Further, the magnetic sensors 87, 88, 89 detect the position of the permanent magnet provided in the actuator 6 and send a detection signal to the sequence controller 70, whereby the sequence controller 70 controls the vertical movement of the actuator 6. To do.

The sequence controller 70 moves the actuator 6 up and down in a predetermined procedure, and its configuration includes, for example, a plurality of relays and a plurality of timers. The sequence controller 70 is provided with a main switch 71 and a start switch 72. The workpiece 9 is sequentially carried out by the belt 90.

The operation of the above arrangement will be described with reference to FIG. In the figure, state A shows the initial drive state of the tool holder 1. That is, the main switch 71 is turned on and the sequence controller 70 is operated. At this time, the solenoid valve 81 remains off. As a result, by opening an air valve (main valve) (not shown), air is supplied to the air cylinder 80 via the introduction pipe 82 and the introduction pipe 84, and the actuator 6
Is raised and held in place by a stopper (not shown). At the same time, the solenoid valve 31 also turns off and the actuator 20 retracts.

The state B indicates a state in which the workpiece 9 is processed by the tool 5. That is, when the start switch 72 is turned on, the solenoid valve is activated by the output signal from the sequence controller 70.
When 81 is turned on and air is supplied to the air cylinder 80 through the introduction pipe 83, the actuator 6 is lowered, and the tool 5 is set at a predetermined position with respect to the workpiece 9 by a stopper (not shown). As a result, the tool 5 processes the workpiece 9. Further, when the tool 5 is set at a predetermined position and the output signal from the sequence controller 70 is sent to the solenoid valve 31 and the solenoid valve 31 is turned on, the air in the air cylinder 30 is discharged from the discharge pipe 33. Actuator 20, the actuator 20 sticks out.

The C state indicates a state in which the tool holder 1 is stopped in the middle. That is, for example, when the machining time of the tool 5 set in advance by the timer built in the sequence controller 70 is reached, the solenoid valve 81 is turned off by the output signal from the sequence controller 70, so that the actuator 6 rises and sticks out. The tool 5 is stopped at that position because a part of the tool holder 1 comes into contact with the actuator 20 thus moved. After that, the machining of the workpiece 9 by the tool 5 is repeated in the B state and the C state.

The D state shows the state after the machining operation of the tool 5 is stopped, that is, the state when the tool holder 1 returns to the initial drive state (A state). That is, when the switch 72 is turned on again, the solenoid valves 31 and 81 are turned off by the output signal from the sequence controller 70, the actuator 20 is retracted into the air cylinder 30, the actuator 6 is lifted, and a predetermined stopper is pressed by a stopper (not shown). Held in position.

The E state indicates a state in which the tool holder 1 is prevented from falling.
That is, when the main switch 71 is turned off in the D state, the solenoid valves 31 and 81 are turned off and the actuator 20 projects. As a result, when the air valve (main valve) is closed, the actuator 6 starts to descend due to the weight of the tool holder 1. At this time, the side wall of the projection receiving groove 4 comes into contact with the protruding actuator 20, so that the tool holder 1 is prevented from falling.

It should be noted that in the present invention, the tool holder 1 is provided to prevent falling.
Although the projection receiving groove 4 is provided in the above, a protrusion protruding from the tool holder 1 may be used instead of the projection receiving groove 4 to perform the intermediate stop and the drop prevention of the tool holder.

[Effect of device]

As described above, according to the present invention, by providing the projection receiving groove in a part of the tool holder, the tool intermediate stop device can perform the function of preventing the tool holder from falling. Since it is not necessary to provide a tool holder drop prevention device separately from the tool intermediate stop device, the device can be simplified and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a diagram showing the principle configuration of a tool intermediate stop device according to the present invention, FIG. 2 is a diagram showing the operation of FIG. 1, FIG. 3 is a diagram showing an embodiment of the present invention, and FIG. FIG. 3 is a diagram showing the operation of FIG. 3, and FIG. 5 is a diagram showing a conventional example. 1 ... Tool holder, 2 ... Projection part, 3 ... Projection drive part, 4 ... Projection receiving groove, 5 ... Tool, 6 ... Actuator, 7 ... Control part, 8 ... Actuator drive part.

Claims (1)

[Scope of utility model registration request] 1. A tool holder (1) for holding a tool (5) for processing a workpiece (9) and vertically moved according to a predetermined procedure; and a tool holder (1) provided in the vicinity of the tool holder (1),
A projection drive part (3) for moving the projection part (2) forward and backward, and the tool holder (1) is brought into contact with the projection part (2) projected from the projection drive part (3), A tool intermediate stop device for intermediately stopping a tool (5), wherein a projection receiving groove (4) provided in the tool holder (1) is provided so as to face the projection (2), and when the processing is completed, the tool holder is When the (1) falls due to its own weight, the tool holder (1) is locked by the protrusion (2) protruding into the protrusion receiving groove (4). apparatus.