JPH0464285B2 - - 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 device, and are cylinders 10 and 12 each having a rod that protrudes in the vertical direction and grips a molded product and a sprue, respectively, by a gripping device provided at the lower end. , forward and backward movement cylinders 14 and 16 that move the cylinders 10 and 12 back and forth in the direction of the mold surface when taking out the molded product and sprue, and further move the molded product and sprue in the lateral direction of the molding machine after gripping the molded product and sprue. In order to discharge the molding machine, 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 addition, the traverse distance of the main body 18 is a long distance from the position where the cylinders 10 and 12 are located directly above the mold to the position directly above where the molded product is dropped, and the rail device 20 becomes long. In addition, there is a problem in that the time required to take out the molded product becomes longer.

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 cylinder 10 is rotated after gripping the molded product with the gripping device at the lower end of the rod of the cylinder 10, 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 rod 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) Therefore, the present invention was made to solve the problems of the above-mentioned conventional device, and its purpose is to significantly downsize the device, and to improve the molded product take-out arm, etc. To provide a molded product retrieval device that does not cause twisting, bending, etc. due to unreasonable inertia.

A molded product ejecting device that takes out molded products from a plastic mold is characterized by a main rotating shaft that is rotatably supported on the main body, and a drive unit that rotates the main rotating shaft in forward and reverse directions about the axis. ,
a rotating arm that is fixed at its base so as to extend substantially perpendicularly to the main rotating shaft, and that rotates back and forth 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 arm by an appropriate member and through which the main rotating shaft is rotatably inserted through the central portion; an idler pulley provided at the tip of the rotating arm; a linear member that is stretched between the pulley and the idler pulley and restricts the idler pulley to rotate around its axis when the rotating arm rotates; and a linear member that is fixed to the idler pulley by an appropriate member. a molded product take-out arm having a gripping device capable of gripping a molded product at a lower end; a rail device that guides the main body to reciprocate in a direction parallel to a rotation plane of the rotation arm; and a drive section that causes the main body section to travel back and forth along the device.

(Embodiments) Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a perspective view schematically showing a molded product removal device according to the present invention.

In the figure, reference numeral 23 denotes a rotating arm, which is rotatably provided on the main body 100 at its base.

Reference numeral 101 denotes a molded product take-out arm, which is attached to the tip of the rotating arm 23 by a fixture 102, and moves in an arc as the rotating arm 23 rotates, but its direction is always fixed (for example, vertically). It is set to face downward. This specific configuration will be described later.

At the lower end of the molded product take-out arm 101 is a gripping device 103 that can grip the molded product and/or sprue attached to the mold surface by suction or the like.
is attached. The gripping device 103 is equipped with an appropriate posture control device.

The main body 100 is guided to reciprocate on a rail device 104 in the lateral direction of a molding machine (not shown). 105 is a cylinder device for driving the same.

The rail device 104 is positionably fixed on a rail 107 which is pivotably fixed to the column 106 .

Next, details of each part will be explained.

In FIGS. 2 and 3, reference numeral 23 designates the rotating arm, which is fixed at its base perpendicularly to the horizontal shaft 24, which is the main rotation axis.

The horizontal shaft 24 passes through the casing 108 of the main body portion 100 and is rotatably supported by a bearing 26 .

27 is a piston that fits into the cylinder 28, 29
is the piston rod. piston rod 2
A rack 30 is engraved on the bottom surface of the rack 9.
9 meshes with a pinion 31 provided on the horizontal shaft 24. 32 is a joint equipped with a speed controller mechanism, and a tube 33 sends and discharges working fluid to the cylinder chamber A. Further, working fluid is sent and discharged from the tube 34 to the cylinder chamber B via the joint 35. This allows the piston 27
is driven back and forth, and the horizontal shaft 24 is rotated forward and backward.

A gear 109 is fixed to the end of the horizontal shaft 24, and this gear 109 connects to the rail device 104.
It meshes with a rack 110 provided in the.

Therefore, when the piston 27 is reciprocated, the horizontal shaft 24 is rotated as described above, and the rotation arm 23 is reciprocated, and at the same time, the gear 1 is rotated.
By rolling 09 on the rack 110,
The casing 108, that is, the main body 100 itself is also driven back and forth along the rail device.

FIG. 2b shows a cross-sectional view of the rail device 104.

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. A tension roller 40 is freely rotatably supported in the middle of the rotary arm 23, contacts the endless wire 39, and applies a certain tension to the endless wire 39.

41 is a fixed block fixed to the end face of the free rotating pulley 38; 102 is the above-mentioned fixture provided so as to be able to move slightly toward and away from the fixed block 41 by means of a lock cylinder 112; and 101 is this fixture 1.
This is the aforementioned molded product take-out arm fixed to 02.

The present invention is configured as described above.

Next, its effect will be explained.

The device of the present invention is installed at a predetermined position above and to the side of the molding die of a molding machine so that the rotating direction of the rotating arm 23 is perpendicular to the molding machine. In the moving position, the molded product take-out arm 101 is installed at a position where it can grip the sprue or the like attached to the molding die.

When the cylinder 28 is driven, the main body 100 runs on the rail device 104 toward the molding die, and at the same time, the rotating arm 23 rotates toward the molding die.
The gripping device 103 of the molded product take-out arm 101 moves to a position facing the molded product attached to the molding die and stops there.

In this case, the molded product take-out arm 101 moves while maintaining a predetermined angle. That is, the fixed pulley 36 is regulated by the endless wire 39 that is stretched between the free rotating pulley 38 and the free rotating pulley 38 is always rotated with respect to the fixed shaft 37 so that the same direction is downward. This is because the cylinder 42, which is vertically attached to the idler pulley 38 by the attachment member 41, is rotated about the horizontal shaft 24 while always facing in the vertical direction.

Subsequently, the punch cylinder 112 is reciprocated, and the gripping device 103 grips the molded product (or sprue) attached to the mold surface.

Next, the cylinder device 105 is driven to move the main body 100 in the lateral direction of the molding machine. In addition, the rotating arm 23 is rotated in the opposite direction to the above to carry out the molded product, and the gripping device 10 is held at a predetermined position.
3 can be released and the molded product can be dropped.

Therefore, in the above embodiment, as shown in FIG. 4, the trajectory of the tip of the rotating arm 23 is semi-elliptical. And the molded product take-out arm 101
The moving distance is approximately equal to the traveling distance of the main body 100 plus twice the length of the rotating arm 23. Since the rotating arm 23 itself also serves as a transport function, the traveling distance of the main body 100 can be reduced by that amount. can be reduced.

Note that an appropriate cylinder device may be used as the molded product take-out arm 101.

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

The molded product take-out arm 101 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. The rotating direction of the rotating arm 23 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.

Further, in the above embodiment, the cylinder device 105 serves both as the traveling drive mechanism of the main body 100 and the drive mechanism of the rotating arm 23, but it goes without saying that they may be driven separately.

A motor can generally be employed as the traveling drive mechanism for the main body portion 100. Even in this case, since the rotating arm 23 still forms a part of the transport distance of the molded product, the travel distance of the main body portion 100 can be set short.

(Effects of the Invention) As described above, according to the molded product take-out device according to the present invention, since the rotating arm itself forms a part of the molded product conveyance path, the traveling distance of the main body is determined by the length of the rotating arm. The length can be reduced by approximately twice as much, and the rail device can be configured that much more simply, and the time required to take out the molded product can be shortened.

Furthermore, since the molded product take-out arm always moves in parallel while maintaining a constant angle, no unreasonable inertial force is applied to the arm body, and no deformation such as bending or twisting occurs.

Furthermore, a single drive unit can serve both the rotation of the main rotating shaft and the movement of the main body, making the device compact and
Moreover, it can be configured to be lightweight.

Although the present invention has been variously explained above with reference to preferred embodiments, the present invention is not limited to these embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. It is.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a preferred embodiment of the molded product ejecting device according to the present invention, Fig. 2 is a sectional view of the main part thereof, Fig. 3 is a front view of the rotating arm, and Fig. 4 is a molded product ejecting device according to the present invention. FIG. 5 is an explanatory diagram showing the movement locus of the product take-out arm, and FIG. 5 is an explanatory diagram showing a state in which both ends of the wire are fixed to the outer periphery of the fixed pulley. 6 and 7 are a front view and a side view, respectively, of the conventional device. 8th
The figure is a front view of another conventional device. DESCRIPTION OF SYMBOLS 10, 12... Cylinder, 14, 16... Fore-and-aft cylinder, 18... Main body part, 20... Rail device, 23
...Rotating arm, 24...Horizontal shaft, 26...Bearing, 27...Piston, 29...Piston rod, 3
0...Rack, 31...Pinion, 32...Speed controller, 32, 35...Coupling, 33, 34...Tube, 36...Fixed pulley, 37...Horizontal fixed shaft,
38... Idle pulley, 39... Wire, 40... Tension roller, 41... Fixed block, 42... Cylinder, 52... Wire, 100... Main body, 101... Take-out arm, 102... Fixture, 103... Gripping device, 104 ...Rail device, 105...Cylinder device, 106...Strut, 107...Rail, 108...Casing, 109...Gear, 110...Rack, 11
2...Tight cylinder.

Claims (1)

[Scope of Claims] 1. A molded product ejecting device for taking out a molded product from a plastic mold, comprising: a main rotating shaft rotatably supported on a main body; a rotating arm that is fixed at its base so as to extend substantially perpendicularly to the main rotating shaft, and that reciprocates 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 an idler provided at the tip of the rotating arm. a pulley; a linear 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; a molded product take-out arm that is fixed by a member and has a gripping device at its lower end that can grip the molded product; and a rail that guides the main body to reciprocate in a direction parallel to the rotation plane of the rotation arm. A molded product removal device comprising: a device; and a drive unit that causes the main body portion to reciprocate along the rail device. 2. A molded product ejecting device that takes out molded products from a plastic mold has a main rotating shaft that is rotatably supported on the main body, and a main rotating shaft that is fixed at its base so as to extend substantially perpendicular to the main rotating shaft. , a rotating arm that reciprocates over a predetermined angular range by the forward and reverse rotation of the main rotating shaft; a fixed pulley through which the main rotating shaft is rotatably inserted; an idler pulley provided at the tip of the rotating arm; and the rotating arm is rotated by being spanned between the fixed pulley and the idler pulley. a linear member that restricts the rotation of the free-rotating pulley around its axis; a molded product take-out arm that is fixed to the free-rotating pulley by an appropriate member and has a gripping device at its lower end that can grip the molded product; , a rail device that guides the main body to reciprocate in a direction parallel to the rotation plane of the rotation arm; and a rail device that reciprocates the main rotation shaft and that a gear provided on the main rotation shaft moves along the rail. A molded product retrieval method comprising: a drive section that engages with a rack provided in the device to cause the main body portion to reciprocate along the rail device in accordance with the reciprocating rotation of the main rotating shaft. Device.