JPH0234297B2 - SEIKEIHINTORIDASHISOCHI - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a molded product removal device.

(Prior Art and its Problems) Various devices are known for taking out molded products from plastic molds.

FIGS. 6 and 7 show the most common type of apparatus; a cylinder 10 having a rod that protrudes in and out of the vertical direction and grips a molded product and a sprue, respectively, by a gripping device provided at the lower end; 12, and forward and backward movement cylinders 14, 16 that move the cylinders 10, 12 back and forth in the mold surface direction when taking out the molded product and sprue; In order to do this, a rail device 20 is provided that allows the main body 18 including the cylinders 10, 12 and the longitudinally moving cylinders 14, 16 to traverse in the lateral direction of the molding machine.

The conventional device described above has a problem in that the rail device 20 for traversing the main body 18, which weighs several tens of kilograms, in the lateral direction of the molding machine is a large and complicated mechanism.

In order to solve the above problems, as shown in FIG. 8, the cylinder 10 for taking out the molded product is
There is a simple take-out device that is provided so as to rotate around the longitudinally movable cylinder 14 and omits the above-mentioned rail device 20.

However, in this conventional device, since the cylinder 10 rotates around its center, a large inertial force acts on the cylinder 10 when starting and stopping rotation, which may cause the cylinder 10 to bend or twist. . Moreover, if the molded product is gripped by the gripping device at the lower end of the rod of the cylinder 10 and the cylinder 10 is then rotated, the lower part of the rod will collide with the safety door of the molding machine, etc., so when rotating the cylinder 10, It is necessary to drive the cylinder 10 and rotate it with the lower part of the rod completely raised above the molding machine. Therefore, the vertical balance of the cylinder 10 with respect to the longitudinally movable cylinder 14 is biased toward the cylinder 10 main body side, which further increases the above-mentioned inertial force and promotes bending, twisting, etc. of the cylinder 10.

(Summary of the Invention) The present invention has been made to solve the above problems, and its purpose is to simplify and downsize the device by eliminating the need for a rail device, and to eliminate the unreasonable inertia of the cylinder. The purpose of the present invention is to provide a molded product ejecting device in which no force is applied and the cylinder does not bend or twist. a shaft, a drive unit that rotates the main rotation shaft in forward and reverse directions about the axis;
a rotating arm fixed to the main rotating shaft at its base so as to extend substantially perpendicularly to the main rotating shaft, and reciprocatingly rotates over a predetermined angular range as the main rotating shaft rotates forward and backward; a fixed pulley that is fixedly supported near the base of the rotating arm by an appropriate member and through which the main rotating shaft is rotatably inserted through the central portion; and a fixed pulley that is provided at the tip of the rotating arm. a pulley, a filament member that is stretched between the fixed pulley and the free-rotating pulley and restricts the free-rotating pulley to rotate around its axis when the rotating arm rotates; The molded product take-out arm is fixed by a member and has a gripping device at its lower end that can grip the molded product.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, together with their effects.

FIG. 1 shows a molded product removal device 22 according to the present invention.
FIG. 2 is a longitudinal sectional view showing a preferred embodiment of the invention, and FIG. 2 is a front view.

In the figure, reference numeral 23 denotes a rotating arm, which is fixed perpendicularly to the horizontal shaft 24 at its base, at the tip of the horizontal shaft 24 which is the main rotating shaft.

The horizontal shaft 24 vertically passes through a midway portion of a cylinder device 25, which is a drive unit that rotationally drives the horizontal shaft 24, and is rotatably supported by a bearing 26. 27 is a piston that slides into the cylinder 28, and 29 is its piston rod. A rack 30 is carved at the bottom of the piston rod 29,
This rack 30 meshes with a pinion 31 mounted on the horizontal shaft 24. 32 is a joint equipped with a speed controller mechanism, and tube 33
The working fluid is delivered to and discharged from the cylinder chamber A.
In addition, from the tube 34 to the joint 35 is connected to the cylinder chamber B.
The working fluid is delivered and discharged through. As a result, the piston 27 is reciprocated, and the horizontal shaft 24
is rotated forward and backward.

36 is close to the base of the rotating arm 23,
This is a fixed pulley fixed to a bearing 26, and the above-mentioned horizontal shaft 24 is loosely inserted into the center of this fixed pulley 36. Also, at the tip of the rotating arm 23,
An idler pulley 38 is arranged to freely rotate around a horizontal fixed shaft 37 fixed to the rotating arm 23. An endless wire 39 is stretched between the fixed pulley 36 and the free rotating pulley 38. Reference numeral 40 denotes a tension roller, which is freely rotatably supported in the middle of the rotating arm 23 and comes into contact with the endless wire 39.
A certain tension is applied to the endless wire 39.

Reference numeral 41 indicates a mounting member fixed to the end surface of the free rotating pulley 38, and reference numeral 42 indicates a cylinder that is supported by the mounting member 41 and extends in the vertical direction. At the lower end of the rod 43 of the cylinder 42, a gripping device 44 for gripping the molded product is provided, which is comprised of a suction cup or the like.

45 is a longitudinally moving cylinder, and its rod 46
The tip end is connected to the lower part of the cylinder device 25 via a connecting plate 47, and the cylinder device 25 and the rotating arm 2
3. Move the main body, such as the cylinder 42, back and forth in the left-right direction in FIG. 48 is its guide base (Fig. 2). By this back-and-forth moving cylinder 45, a gripping device 44 provided at the lower end of the cylinder 42 is reciprocated in the direction of the mold surface to which the molded product is attached, and takes out the molded product from the mold surface. .

49 is a brake device, and the horizontal shaft 24
It is provided at the rear end of the horizontal shaft 24 and applies braking when the horizontal shaft 24 stops rotating forward or backward. The brake device 49 may have a structure such as a disc brake, a band brake, or a drum brake.

50 is a filter regulator for the working fluid of the cylinder device 25.

The present invention is configured as described above.

Next, its effect will be explained.

As shown in FIG. 3, the device of the present invention is installed at a predetermined position above and to the side of the molding die 51 of a molding machine so that the rotating direction of the rotating arm 23 is perpendicular to the molding machine. It will be done.

To take out the molded product, the cylinder 28 is first driven to rotate the horizontal shaft 24 through 90 degrees, thereby rotating the rotating arm 23 in the direction of the molding machine to a horizontal position. In this case, the free-rotating pulley 38 is rotated relative to the fixed shaft 37 so that the same direction always faces downward, regulated by the endless wire 39 that is stretched between the fixed pulley 36 and the free-rotating pulley 38. , a cylinder 42 that is vertically attached to the idler pulley 38 by a mounting member 41
The horizontal shaft 24 is always facing vertically.
It is rotated around , and moved to the X position directly above the molded product.

Subsequently, the cylinder 42 is driven and the gripping device 44
is lowered into the molding mold 51 space, and then the back-and-forth motion cylinder 45 is driven and the gripping device 44 grips the molding mold 5.
The molded product is reciprocated in one surface direction to take out the molded product from the molding die 51 surface. Subsequently, the gripping device 44 is pulled up by the cylinder 42 while gripping the molded product. Next, the cylinder 28 is driven and the rotating arm 2
3 is rotated approximately 180 degrees in the opposite direction to the above, and the molded product is delivered to the Y position in the lateral direction of the molding machine. Here, the molded product falls from the gripping device 44 and is stored in a suitable storage box or the like. Then, the cylinder 28 is driven and the rotating arm 23 returns to the upright position.

The standby position of the rotating arm 23 is the above-mentioned X position and Y position.
position or a central standing position.

Further, the rotation angle range of the rotation arm 23 is not limited to 180°.

The cylinder 42 does not necessarily have to be fixed in the vertical direction, and may be attached in an oblique direction depending on the space conditions of the molding machine. Rotating arm 2
The direction of rotation of No. 3 does not have to be exactly perpendicular to the molding machine, but may be rotated in a slightly oblique direction.

Furthermore, the endless wire 39 may be a chain. In addition, a general flexible linear member such as a timing belt may be used. In the case of a chain, each pulley becomes a sprocket. In the present invention, the term "pulley" includes a sprocket and the like.

Moreover, the endless wire 39 does not necessarily have to be endless. That is, as shown in FIG.
Even if both ends of the pulley are fixed to the outer periphery of the fixed pulley 36, similar effects can be obtained.

Furthermore, as shown in FIG.
If the rotation angle range is selected to be large enough to allow the gripping device 44 to rotate to a position where it enters the inner space of the mold 51, the cylinder 42 described above becomes unnecessary, and the gripping device 44 can be directly attached to the loosely inserted pulley 38 by an appropriate mounting member. can be attached to.

(Effects of the Invention) As described above, according to the molded product retrieval device according to the present invention, the molded product is transported out of the molding machine by the rotation of the rotating arm, so a large and complicated rail device is not required. It is possible to reduce the weight and size without having to do so.
Furthermore, since the molded product take-out arm always moves in parallel, no unreasonable inertial force is applied to the arm body, and deformations such as bending and twisting do not occur.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view showing a preferred embodiment of the molded product retrieval device according to the present invention, FIG. 2 is an explanatory front view thereof, FIG. 3 is an explanatory diagram when retrieving a molded product, and FIG. FIG. 5 is an explanatory diagram showing other embodiments. 6 and 7 are a front view and a side view, respectively, of the conventional device. FIG. 8 is a front view of another conventional device. 23...Rotating arm, 24...Horizontal shaft,
25...Cylinder device, 36...Fixed pulley, 3
8... Idle pulley, 39... Endless wire, 42...
... Cylinder, 44 ... Gripping device, 45 ... Back-and-forth movement cylinder, 49 ... Brake device, 50 ... Filter regulator, 51 ... Molding die, 52 ...
wire.

Claims (1)

[Claims] 1. In a molded product removal device that takes out a molded product from a plastic mold, a main rotating shaft, a drive unit that rotates the main rotating shaft in forward and reverse directions about its axis, and a drive unit that rotates the main rotating shaft with respect to the main rotating shaft. A rotating arm is fixed at its base so as to extend in a substantially vertical direction, and rotates reciprocatingly over a predetermined angular range as the main rotating shaft rotates forward and backward; a fixed pulley that is fixedly supported by a member and through which the main rotating shaft is rotatably inserted through the central portion; an idling pulley provided at the tip of the rotating arm; and the fixed pulley and the idling pulley. a filament member that is stretched across the shaft and restricts the rotation of the idler pulley around its axis by the rotation of the rotary arm; A molded product retrieval device comprising: a molded product retrieval arm having a gripping device capable of gripping a molded product retrieval arm.