JP2583398Y2 - Parallel opening and closing type chuck device for molding machines - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chuck device for removing a molded product from a die casting machine or an injection molding machine, and more particularly to a parallel opening / closing type chuck device.

[0002]

2. Description of the Related Art Generally, this type of chuck device is of a parallel-moving horizontal opening / closing type or a toggle-type vertical opening / closing type. Hereinafter, these will be briefly described.

First, a horizontal opening / closing type chuck device 10 (FIG. 3)
reference. Hereinafter, it is abbreviated as a parallel opening / closing type chuck device. )
Is a first reciprocating piston 16A having one end fixed to an operating rod 14 of a cylinder 12, and a piston 16A
And a second piston 16B that is reciprocated in the opposite direction via a swing connection lever 18 and has holders 20A and 20B respectively attached to the other ends of both pistons 16A and 16B. Gripping claws 22A, 2 through
2B is configured to be held to face left and right. Therefore, according to such a configuration, by reciprocating the two pistons 16A and 16B in the opposite directions via the cylinder 12, the two gripping claws 22 are
A, 22B can be advanced and retracted in parallel in the horizontal direction, and the cylindrical holding part of the molded product, that is, the biscuit 24 can be gripped.

[0004] Next, a toggle type up / down open / close type chuck device 2
Reference numeral 6 (refer to FIG. 4; hereinafter, abbreviated as a toggle-type chuck device. In the drawing, the same components as those in FIG. 3 are denoted by the same reference numerals). And a pair of upper and lower opening / closing arms 30A and 30B which are connected to each other via a pair of open / close arms 28A and 30B.
2B is configured to be held upside down. Therefore, according to such a configuration, by opening and closing both open / close arms 30A, 30B around the support shafts 34A, 34B via the cylinder 12, the two gripping claws 22A, 22B are moved up and down as indicated by arrows. Open and close, biscuit 2
4 can be gripped.

[0005]

However, each of the above-mentioned conventional chuck devices has the following drawbacks, and improvements have been demanded.

That is, first, as shown in FIG. 5, the horizontal opening / closing type chuck device 10 is provided with a horizontal opening / closing mechanism for unloading the molded product 36. Therefore, the chuck device 10 is first placed in front of the molded product. After moving forward, turn left and biscuit 2
After grasping 4 and then going to the right, it must be retracted and the molded article must be carried out. Therefore, a relatively large work space is required, and a relatively large unloading device 42 having the reversing mechanism 38, the traversing cylinder 40 and the like is usually required. Reference numerals 44 and 46 in the figure indicate a fixed mold and a movable mold, respectively.

[0007] On the other hand, the toggle type chuck device 26 is provided in FIG.
As can be seen from the above, it is clear that the structure is simple and compact and the working space is small as compared with the above-mentioned chuck device. Therefore, as shown by the chain line in FIG.
The chuck device 26 can advance and grip the biscuit 24 from just beside. That is, the work space is reduced and the unloading cycle time is reduced.

However, this type of chuck device 26 is
As indicated by a chain line in FIG. 4, when the diameter of the biscuit 24 changes, there is a fundamental difficulty in that the grip center point moves and the gripping force itself changes. For this reason,
This type of chuck device 26 is provided with a large number of spacers 32A and 32B that can be replaced with the gripping claws 22A and 22B in order to solve the above-mentioned difficulties. And it took a lot of time.

As described above, the conventional chucking device requires a large working space and a long cycle time in the former chucking device 10, while a large number of replacement spacers are required in the latter chucking device 26. It took a lot of troublesome work and considerable time to exchange.

SUMMARY OF THE INVENTION An object of the present invention is to provide a parallel opening / closing type chuck apparatus for a molding machine which can reduce a working space and a cycle time and does not require any special replacement parts. .

[0011]

In order to achieve the above object, a parallel opening / closing type chuck device for a molding machine according to the present invention is provided.
A knuckle reciprocally supported on the frame, and a pair of substantially Ls which support one end on a support shaft provided on the knuckle and are symmetrically disposed outside the knuckle outside the knuckle;
A link, a pair of parallel arms pin-coupled to each other free end of the link, and a pair of gripping claws mounted opposite to each other free end of the arm. The link is formed such that the pin connecting portion with the knuckle and the arm and the arm is loosely fitted and / or slidable, and the link is pivotally attached to a fixed shaft provided on a frame. The arm is configured to be swingable, and the main body is configured to be capable of being opened and closed in parallel with each other by being inserted into a fixed guide bar orthogonal to the arm provided on the frame,
Thus, the knuckle is reciprocated to open and close the grip claws in parallel with each other.

In this case, the gripping claws can be configured to open and close in parallel in the vertical direction with respect to the molding machine, and the fixed guide bar can be configured by two parallel guide bars.

[0013]

In the chuck device of the present invention, the arm for gripping the gripper operates substantially in a toggle link manner by a knuckle and a link, and the arm is translated by a guide bar. That is, according to the present invention, the advantages of the toggle type chuck device and the advantages of the horizontal opening and closing type chuck device are simultaneously achieved.

Accordingly, the working space can be reduced and the cycle time can be reduced, and at the same time, there is no need to replace the spacer when changing the molded product.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a parallel opening / closing type chuck device for a molding machine according to the present invention. For convenience of explanation, FIGS.
The same reference numerals are given to the same components as those in the conventional structure shown in FIG.

1 and 2, the parallel opening / closing type chuck device 50 of the present invention basically includes a knuckle 54 supported on a frame 52 via a cylinder 12 and an operating rod 14 so as to be reciprocally movable. One end is supported on a support shaft 56 provided on the knuckle 54 and the knuckle 5
4 and a pair of substantially L-shaped links 58A, 58B symmetrically disposed outside the link 4;
Arm pins 60A respectively on the respective free ends,
A pair of arms 6 parallel to each other connected via 60B
A pair of gripping claws 22A and 22B are attached to the free ends of the 2A and 62B so as to face each other. Incidentally, as shown in FIG. 2, the arm pin 60
A and 60B are fixed on arms 62A and 62B , respectively.

However, each of the links 58A, 58B
Is arm pin 60A in the shaft support and the other end against the knuckle support shaft 56 at one end, the pin coupling section for 60B, respectively elongated holes 64A, 64B and the long hole 66A, is pivotally attached to 66B, further to the middle portion
It is configured so as to be pivotally mounted on the fixed shafts 68A, 68B and swingable around the fixed shafts 68A, 68B. On the other hand, each of the arms 62A and 62B is
2 fixed guide bars 7 orthogonal to the arm provided in 2
0,72 so that they approach or move away from each other
And open and close in parallel .

Therefore, according to the chuck device of the present invention,
For example, in a state where the FIG. 1 are indicated by the solid line, the knuckle 54 via the cylinder 12, retracting the left direction shown in the figure, each link 58A and 58B, the knuckle 54
Slots 64A and 64B pivotally connected to a support shaft 56 provided above.
One end provided with the knuckle 54 is
By being stretched, the fixed shafts 68A and 68B are centered.
Swings clockwise and counterclockwise as shown.
And at the free ends of the links 58A and 58B
In this case, pivots are provided via arm pins 60A and 60B, respectively.
Arms 62A and 6 provided with elongated holes 66A and 66B to be attached
2B approach each other along guide bars 70 and 72
Can be moved in any direction . As a result,
The holding claws 22A and 22B attached to the free ends of the arms 62A and 62B approach in parallel in the vertical direction , respectively, and have a small diameter as shown by a chain line in FIG. The chuck operation can be performed normally and reliably with a strong grasping force even for the biscuit 24 of
Can be achieved .

As described above, the chuck device of the present invention does not require a complicated and large piston means unlike the horizontal opening and closing type chuck device, so that the entire device is simple and small,
Cycle time is reduced at the same time as space is reduced. On the other hand, since the gripping claws are opened and closed in parallel in the vertical direction, in other words, there is no misalignment due to the diameter of the biscuit (the size of the molded product) unlike a toggle type chuck device, so a complicated spacer for changing the molded product is required. Replacement work becomes unnecessary. Therefore, a simple and efficient chuck device can be provided with a relatively simple configuration.

Although the present invention has been described with respect to a preferred embodiment, the present invention is not limited to the above-described embodiment.
Many design changes are possible without departing from the spirit thereof. For example, the moving direction of the gripping claws may be configured in a horizontal direction, and the guide bar of the arm may be configured as a single bar.

[0021]

As described above, the parallel opening / closing type chuck device for a molding machine according to the present invention comprises a reciprocating knuckle, a pair of links supported by the knuckle, and a pair of pins connected to the link by pins. In a chuck device including an arm and a pair of gripping claws attached to the arm so as to face each other, the link is swung by reciprocating the knuckle so that the arm is moved in parallel. The respective advantages of the chuck device and the horizontal opening and closing type chuck device are simultaneously achieved. That is, according to the present invention, the entire apparatus is simple and small, the space is reduced and the cycle time is shortened. On the other hand, even if the molded product (biscuit) is changed, the center of the gripping claw does not occur, A complicated set-up change (replacement of spacers for gripping claws) is not required. Thus, a simple and efficient chuck device can be provided.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a parallel opening / closing type chuck device for a molding machine according to the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a front view showing a conventional horizontal opening and closing type chuck device.

FIG. 4 is a front view showing a conventional toggle-type vertical opening / closing type chuck device.

FIG. 5 is an overall side view showing a gripping / unloading operation of a molded product by the horizontal opening / closing type chuck device shown in FIG. 3;

[Explanation of symbols]

12 cylinder 14 actuating rod 22A, 22B gripping claws 24 biscuit 50 parallel switching models chuck device 52 frame 54 the knuckle 56 support shaft 58A, 58B links 60A, 60B arm pins 62A, 62B arms 64A, 64B long hole 66A, 66B long hole 68A , 68B Fixed shaft 70, 72 Guide bar

Claims (3)

(57) [Scope of request for utility model registration] 1. A knuckle supported reciprocally on a frame, and a pair of knuckles which support one end on a support shaft provided on the knuckle and are symmetrically disposed outside the knuckle. A substantially L-shaped link, a pair of mutually parallel arms pin-connected on respective free other ends of the link, and a pair of grips oppositely mounted on respective free other ends of the arms. A fixed shaft having a pawl, wherein the link is formed such that the shaft support portion with the knuckle and the pin connection portion with the arm are freely fitted and / or slidable, and the L-shaped bent portion is provided on a frame body. The arm is configured to be swingable by being pivotally attached to the arm, and the arm is configured to be inserted into a fixed guide bar orthogonal to the arm provided on the frame so that it can be opened and closed in parallel with each other, whereby the knuckle can reciprocate. And hold the gripping claws together Molding machine toggle-link parallel switching models chuck apparatus characterized by configured to row connection. 2. The parallel opening / closing type chuck device for a molding machine according to claim 1, wherein the gripping claws are vertically opened and closed with respect to the molding machine. 3. The parallel opening / closing type chuck apparatus for a molding machine according to claim 1, wherein the fixed guide bar comprises two parallel guide bars.