JPH06246691A - Cutting device - Google Patents

Abstract

PURPOSE:To replace a cutting blade very easily and efficiently without performing dangerous work. CONSTITUTION:A device has a holding part 17 constituted of a holder 15 formed with a grooved part 18 of fitting cutting blades 21 in the point end part of an arm and a clamper 16 for holding the cutting blades 21 by pressing to the holder 15 through the cutting blades 21 by a cylinder. A cutting blade change base 14 of setting up spare cutting blades is provided. A protruding part 32 is provided in an upper part of the cutting blade change base 14. The device is formed with a slit 35 for detaching the cutting blades 21 from the grooved part 18 of the holder 15 by inserting the protruding part 32 to a position of the holder 15 appearing in the cutting blade 21 at the time of replacing the cutting blade 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting device for cutting unnecessary parts such as resin bumpers.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 6, a work 2 such as a resin bumper molded by an injection molding machine 1 is
It is sent out from this injection molding machine 1 by a conveyor 3,
Further, the traverser 5 moved along the rail 4 conveys the work 2 to a cutting device 6 installed on the side of the injection molding machine 1, and the cutting device 6 cuts unnecessary portions such as a gate of the work 2. It had been. The cutting device 6 for cutting the unnecessary portion of the work 2 holds the receiving jig 7 for supporting the conveyed work 2 and the unnecessary portion of the work 2 supported by the receiving jig 7 at the tip of the arm 8. A robot 11 for cutting with the cutting blade, a crusher 12 for crushing unnecessary portions cut by the robot 11, a proximity sensor 13 for detecting wear and damage of the cutting blade held at the tip of the arm 8, It is composed of a cutting blade exchange table 14 in which a plurality of alternative cutting blades are installed.

A holding portion 17 composed of a holder 15 and a clamper 16 is provided at the tip of the arm 8 as shown in FIGS. 7 and 8, and as shown in FIGS. 9 and 10. The groove portion 1 formed in the holder 15 of the holding portion 17
8, a plurality of cutting blades 21, 21 ... Installed in the groove portion 19 of the cutting blade exchanging table 14 in a state of being attracted by magnetic force.
One of the two is fitted, and the clamper 16 is pressed against the holder 15 by the cylinder 22 via the cutting blade 21, so that the cutting blade 21 is sandwiched between the holder 15 and the clamper 16 and securely held. It is like this.

Then, the holding blade 17 is made to hold the cutting blade 21, and the unnecessary portion of the work 2 supported by the receiving jig 7 is cut by the cutting blade 21. In FIG. 8, reference numeral 25 is an engaging projection formed on the holder 15, and when the cutting blade 21 is fitted into the groove portion 18 of the holder 15, the engaging projection 19 is formed on the cutting blade 21. The cutting blade 21 is fitted into the engaged hole 26, and the cutting blade 21 is prevented from coming off the holding portion 17 and the cutting blade 21 is positioned.

By the way, when the proximity sensor 13 detects that the cutting blade 21 is worn or damaged,
It is necessary to replace the cutting blade 21 with a new one installed on the cutting blade exchanging table 14. Here, in the above cutting device 6, by opening the clamper 16 of the holding portion 17 above the waste box 23 shown in FIG. 9, the cutting blade 21 that has been worn or damaged is moved into the waste box 23 by its own weight. After being dropped, one of the new cutting blades 4, 4, ... Of the cutting blade exchanging table 14 was held by the holding portion 17.

[0006]

However, as shown in FIG.
When the cutting blade 21 is broken in the vicinity of the holding portion 17, the fragments of the cutting blade 21 remaining on the holding portion 17 may not drop due to its own weight as shown in FIG. To temporarily stop the holding unit 1
The worker had to perform a dangerous work of manually removing the fragments of the cutting blade 21 remaining on the No. 7. Also,
In such a case, stopping the robot 11 causes a decrease in work efficiency.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a cutting device capable of extremely easily and efficiently exchanging a cutting blade without performing dangerous work. I am trying.

[0008]

The cutting device of the present invention comprises:
A cutting device for cutting an unnecessary portion of an injection-molded product by a cutting blade held by a robot arm, wherein a holding portion provided on the arm for holding the cutting blade and a cutting blade for holding the cutting blade are installed. And a holder having a groove portion into which a part of the cutting blade is fitted, and the holding portion to the holder via the cutting blade fitted into the groove portion of the holder. It is composed of a clamper that is pressed and holds the cutting blade, and the support base has a
A protrusion is provided, and in the holder, a slit is formed at a position facing the cutting blade so that the cutting blade is removed from the groove portion of the holder by inserting the protrusion when the cutting blade is replaced. It is characterized by becoming.

[0009]

According to the cutting device of the present invention, even when the cutting blade is bent near the holding part and the clamper is separated from the holder and the clamper does not drop due to its own weight, the holding part is moved by the arm to move the holder. Insert the protrusion of the support into the slit. With this configuration, the fragment of the cutting blade fitted in the groove of the holder is pushed out of the groove of the holder by the protrusion inserted into the slit.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the cutting device of the present invention will be described below with reference to the drawings. The same parts as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted. In FIG. 1, reference numeral 31
Is the cutting device of the present embodiment. The cutting blade replacement table (support table) 14 provided in the cutting device 31 is provided with a projecting portion 32 at an upper portion on the rear side thereof. This protrusion 32
Is formed in a thin plate shape, and a taper portion 33 is formed in the upper portion on the rear side thereof. A waste box 34 is installed below the projecting portion 32 of the cutting blade exchanging table 14.

As shown in FIG. 2, the holder 15 of the holding portion 17 provided at the tip of the arm 8 is provided on the cutting blade exchange table 14 at a position facing the held cutting blade 21. A slit 35 through which the protrusion 32 can be inserted is formed. A grip portion 36 is provided at a position opposite to the holding portion 17 at the tip of the arm 8 and grips an unnecessary portion of the work (injection-molded product) 2 cut by the cutting blade 21 to grind the grinder 12. It can be transported to.

Next, a cutting operation by the cutting device 31 having the above structure will be described. The work 2 molded by the injection molding machine 1 and sent out by the conveyor 3 is conveyed by the traverser 5 that moves along the rails 4, and is received by the receiving jig 7.
It is supported by the receiving portions 7a, 7a of the sheet and is further fixed by the fixed cylinders 7b, 7b. In this state,
The cutting blade 21 held by the holding portion 17 of the arm 8 of the robot 11 is moved in the direction of arrow a in FIG. 1, the gate (unnecessary portion) 2a of the work 2 is cut off, and the gate receiver 7c of the receiving jig 7 is Received by 7c.

Then, the grip portion 36 of the arm 8 grips the gate 2a received by the gate receivers 7c and 7c, conveys it to the crusher 12, and crushes the gate 2a by the crusher 12. During this time, the fixed cylinder 7 of the receiving jig 7
The fixing of the work 2 by b and 7b is released, and the work 2 is adsorbed by the adsorbing couplers 38 and 38 and conveyed to the next step, and the newly formed work 2 is placed on the receiving jig 7. Supported.

After the gate 2a is conveyed to the crusher 12, the arm 8 is driven to bring the cutting blade 21 closer to the proximity sensor 13, and the proximity sensor 13 detects the wear and damage of the cutting blade 21. Here, when it is detected that the cutting blade 21 is not worn or damaged, the operation moves to cutting the gate 2a of the new work 2 supported by the receiving jig 7, and the cutting blade 21 is worn. If the cutting blade 21 is damaged, the cutting blade 21 is replaced.

Next, the replacement work of the cutting blade 21 will be described. First, the arm 8 is driven, the holding portion 17 is moved above the waste box 23, and in this state, the cylinder 2
The clamper 16 is moved by 2 in the direction away from the holder 15. As a result, the cutting blade 21 held by the holder 15 and the clamper 16 falls into the waste box 23 by its own weight.

Then, the arm 8 is driven again, and the new cutting blade 21 installed on the cutting blade exchanging table 14 is held by the holding portion 17.
Of the holder 15 and then the clamper 16 is pressed against the holder 15 by the cylinder 22 via the cutting blade 21.
The new cutting blade 21 is securely clamped by 6 and held by the holding portion 17. Further, the arm 8 is driven to move to the cutting operation of the gate 2a of the new work 2 supported by the receiving jig 7.

When the proximity sensor 13 detects that the cutting blade 21 is bent near the holding portion 17 as shown in FIG. 3, the following operation is performed. As shown in FIG. 4, the holding portion 17 is moved by the arm 8 above the protruding portion 32 provided on the cutting blade exchanging table 14, and the cylinder 22 moves the clamper 16 in a direction in which the clamper 16 is separated from the holder 15. The holding of the cutting blade 21 by the portion 17 is released. In this state, the arm 8 is further driven, and as shown in FIG.
The protrusion 32 is inserted into the slit 35 formed in the holder 5, and the holder 15 is tilted.

As a result, the fragment of the cutting blade 21 fitted in the groove 18 of the holder 15 is pushed out of the groove 18 by the protrusion 32 which is inserted into the slit 35, and further the taper portion 33 of the protrusion 32. Direction of inclination, ie
The protrusion 32 slides down toward the rear side of the cutting blade exchange table 14.
It is stored in a waste box 34 provided below.

As described above, according to the cutting device 31 of the above-described embodiment, the cutting blade 21 is broken near the holding portion 17, and even if the clamper 16 is separated from the holder 15, a fragment of the cutting blade 21 is held by the holder. When it does not fall from the groove portion 18 of the cutting portion 15 due to its own weight, the protrusion 35 provided in the cutting blade exchange table 14 is inserted into the slit 35 formed in the holder 15, and the cutting blade 21 is broken by the protrusion 32. As it is pushed out, the robot 1
It is possible to omit the dangerous work in which the operator manually stops 1 and the operator manually removes the fragments of the cutting blade 21 from the holder 15 of the holding unit 17. Moreover, since the fragments of the cutting blade 21 can be taken out without stopping the robot 11, the efficiency of the replacement work of the cutting blade 21 can be greatly improved and the productivity can be improved.

The specific construction, structure and arrangement of the cutting device 31 of the above embodiment are not limited to those in the embodiment. Also,
In the embodiment, a bumper is used as an example of the work 2, but the cutting device 31 is not limited to the bumper and can be applied to any injection-molded product.

[0021]

As described above, according to the cutting device of the present invention, the following effects can be obtained. If the cutting blade breaks in the vicinity of the holding part and the fragments of the cutting blade do not drop from the groove of the holder due to its own weight even when the clamper is separated from the holder, the cutting blade replacement table can be installed on the slit formed in the holder. Since the protruding part provided is inserted and the fragment of the cutting blade is pushed out from the holder by this protruding part, the operator stops the robot and the operator manually dismantles the fragment of the cutting blade as in the conventional case. Dangerous work such as taking out from the holder can be omitted. Further, since the fragments of the cutting blade can be taken out without stopping the robot, the efficiency of the replacement work of the cutting blade can be significantly improved and the productivity can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a cutting device illustrating a configuration and a structure of a cutting device according to an embodiment of the present invention.

FIG. 2 is a perspective view of a holder for explaining the shape of the holder of the embodiment.

FIG. 3 is a plan view of the holder for explaining the holder in a state in which a fragment of the cutting blade is held.

FIG. 4 is a perspective view of a protrusion and a holder for explaining an operation of pushing out a fragment of a cutting blade from the holder.

FIG. 5 is a perspective view of a protrusion and a holder for explaining an operation of pushing out a fragment of a cutting blade from the holder.

FIG. 6 is a schematic plan view of an injection molding machine and a cutting device for explaining the configuration and arrangement of the cutting device.

FIG. 7 is a cross-sectional view of a holding unit for explaining the structure of the holding unit provided at the tip of the arm.

FIG. 8 is a perspective view of a holder for explaining the shape of a holder of a conventional cutting device.

FIG. 9 is a side view of a holding section, which is a cross-sectional view of the cutting blade exchange table, for explaining a receiving operation of the cutting blade from the cutting blade exchange table.

FIG. 10 is a perspective view of a cutting blade replacement table of a conventional cutting device and its vicinity.

FIG. 11 is a schematic plan view of a cutting blade and a holding portion for explaining a damage state of the cutting blade.

[Explanation of symbols]

 2 Work (injection-molded product) 2a Gate (unnecessary part) 8 Arm 11 Robot 14 Cutting blade replacement table (support table) 15 Holder 16 Clamper 17 Holding part 18 Groove part 21 Cutting blade 31 Cutting device 32 Projection part 35 Slit

Claims (1)

[Claims] 1. A cutting device for cutting an unnecessary portion of an injection-molded article by a cutting blade held by a robot arm, comprising: a holding portion provided on the arm for holding the cutting blade; and a holding portion for holding the cutting blade. And a holder having a groove on which a part of the cutting blade is fitted, and a cutting blade fitted to the groove of the holder. It is composed of a clamper that is pressed against the holder via the holder to hold the cutting blade, the support base is provided with a protrusion, the holder,
A cutting device, characterized in that a slit is formed at a position facing the cutting blade so as to separate the cutting blade from the groove portion of the holder by inserting the protruding portion when the cutting blade is replaced.