JPS592917Y2 - Core hold jig installation device for core setter - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a core holding jig attachment device for a core setter that can easily attach and detach a core holding jig for holding cores in a core setter that holds and transports cores to a predetermined position. .

When assembling molds for cylinder blocks such as automobile engines, a core such as a shell mold is held in a core holding jig of a core setter and set on a main mold or core assembly jig on a conveyor line. Recently, the demand for automobiles has been diversifying across different vehicle types, and in order to universally meet the production numbers and delivery dates for each type, it is necessary to produce a wide variety of cylinder blocks on average. Production volume is calculated by compressing the planned monthly production volume for each car model (for example, 1000 units/month XI/25 = 40 units/day)
It is often carried out on a tact basis to mix the daily production volume.

Therefore, core holding jigs for holding the core are prepared for each vehicle model and phase, and the core holding jigs are replaced when the type of mold changes.

However, this core holding jig is large in shape and weight, and the parts that are attached to the core setter body have a structure such as flange joints, making it difficult to attach and detach from the core setter, and it takes a lot of time to change the setup when changing the type of mold. This has the disadvantage that both work efficiency and productivity decrease due to the expended effort.

The present invention has been made in view of these drawbacks, and the core holding jig is positioned with respect to the core setter by dowel fitting, and the core holding jig is positioned by rotating and raising and lowering the clamping means equipped with an actuator. It is an object of the present invention to provide a core holding jig attachment device for a core setter which allows the core holding jig to be easily and reliably attached and detached, and which saves labor in replacing the core hold jig.

Hereinafter, one embodiment of the device of the present invention will be described in detail.

Reference numeral 1 denotes a core hold jig attachment device that removably connects the core hold jig 2 to the body frame 4 of the core setter 3, and a plurality of core hold jig attachment devices (for example, The main components include four sets of positioning means 5, 5... and a plurality (for example, four sets) of clamp mechanisms 6, 6... for removably securing the core holding jig 2 to the main body frame 4. It is included as

The positioning means 5 includes dowel holes 8, 8, . The core holding jig 2 consists of dowels 11, 11, . . . formed upward at the upper end portions of hanging rods 10, 10, .

Further, the hanging rods 10, 10, .
The hanging rod 10 is held in a freely movable manner.
, 10... are connected to the jig frame via spherical bearings 13.13..., intermediate bars 14.14..., spherical bearings 15.15... and brackets) 16.16... It is connected to 9.

17, 17, . . . are cores, and 18, 18, . . . are holding arms that hold the core 17 by cylinders (not shown).

The clamp mechanism 6 includes a clamp arm 21. Followed member 22
, an engaging means 23, a bell crank 24, and an actuator 25 such as a hydraulic cylinder.

The clamp arm 21 is formed into a fork part 26 whose lower end is bent into an L-shape, and is removably engaged with the flanges F, F of the hanging rod 10 from an outer position of the hanging rod 10. is connected to the outer surface of the driven member 22 and fixed with a pole 27.27.

The driven member 22 has a base elongated hole 28 extending vertically in the intermediate portion, and a guide elongated hole 29 that curves vertically from the intermediate portion toward the lower end of the driven member 22 at a position near the base elongated hole. , the guide elongated hole has an upper half formed into a curved portion 30 along an arc of radius R from the upper center point of the base elongated hole 28, and a lower half formed from the base elongated hole 28.
It is formed in a vertically long portion 31 parallel to the .

Further, a cam portion 32 is formed on the lower end surface of the guide elongated hole 29, and a driven pin 33 is provided on the upper end portion of the driven member 22 at an eccentric portion E that is deviated from the vertical center line of the base elongated hole 2B. The base elongated hole 28 and the guide elongated hole 2 are attached to the engagement pin 35.35 fixed to the main body frame 4 via the bracket 34.
9 constitutes an engaging means 23 that connects the clamp arm 21 downward with respect to the main body frame 4.

The bell crank 24 has an intermediate portion pivotally supported by a bracket 36 fixed to the main body frame 4, and has an elongated connecting hole 37 drilled at the distal end that engages with the driven pin 33 of the driven member 22. , the base end is pivotally attached to the distal end of the actuator 25, and the base end of the actuator is pivotally supported on the main body frame 4.

B, B... are the driven pin 33 and the engagement pin 35.3
5 is a ball bearing fitted into the ball bearing.

Note that the base long hole 28, the guide long hole 29, and the retaining pin 35
．． 35 is the main body frame 4 and the driven member 2 instead of this example.
2 can be provided.

Next, the operation of the device of the present invention will be explained.

In the clamping operation, when the clamp mechanisms 6, 6, . . . are in the open position (positions indicated by chain lines in FIGS. 1 and 2), when the actuator 25 is driven forward, the bell crank 24 rotates counterclockwise.

In response to this movement, the driven member 22 rotates clockwise under the guidance of the curved portion 30 of the guide slot 28, and after the fork portion 26 of the clamp arm 21 engages with the flanges F, F of the hanging rod 10, Vertical portion 3 of base long hole 28 and guide long hole 29
1 is guided by the engaging pins 35, 35, the fork portion 26 rises, and the hanging rods 10, 10...
The core holding jig 2 is attached to the core setter 3 by securing it to the core setter 3.

In the unclamping operation, when the actuator 25 is driven backward, the bell crank 24 rotates clockwise.
The driven member 22 has a base long hole 28 and a guide long hole longitudinal portion 31.
When the driven member 22 reaches its lower end under the guidance of the engaging pins 35 and 35 of the base elongated hole 28, the driven member 22 rotates counterclockwise around the engaging pin 35 of the base elongated hole 28, and the cam portion 32 engages the dowel of the hanging rod 10. The core holding jig 2 is removed by pressing the upper end surface of the clamp arm 21 and separating the fork part 26 of the clamp arm 21 from the flanges F, F of the hanging rod.

In addition, in this embodiment, the dowel 11 of the core hold jig 2
is directly pressed down by the cam portion 32 of the driven member 22, but the frame of the core holding jig 2 may also be pressed down.

In the present invention, with the above configuration, the core setter has a dowel for positioning the core holding jig on the main body frame, and
The clamp arm is linked downward by the engaging means, and the clamp arm has a cam portion formed in the lower part of the engaging means, and the clamp arm has a cam portion formed at the lower part of the engaging means, and an eccentric portion that is deviated from the longitudinal center line of the elongated hole constituting the retaining means. By connecting the actuator that drives the core holding jig up and down, the vertical movement and rotational movement of the clamp arm that attaches and detaches the core holding jig can be performed by simply advancing and retracting the actuator, so there is no need to replace the core holding jig. It is extremely simplified and has the excellent effect of improving both workability and productivity.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the device according to the present invention, and FIG. 1 is a front view of a core setter equipped with a holding jig attachment device, FIG. 2 is a central longitudinal sectional view of the core holding jig attachment device, and FIG. FIG. 2 is a sectional view taken along line III-III in FIG. 2; 1...Core hold jig mounting device, 2...
... Core holding jig, 3 ... Core setter, 4
・・Open body frame, 11・・Dowel, 21・・
Curved clamp arm, 23...Engagement means, 25.
...Actuator, 28...Four base long holes, 29
...Guide slot, 32...Cam part, 35
...Curved engagement pin, E...Eccentric part.

Claims (1)

[Scope of utility model registration request] A core holding jig for gripping cores is detachably attached to a core setter, and includes a main body frame of the core setter and a clamp arm disposed on the main body frame for attaching the core holding jig, and the main body frame includes:
There is a dowel for positioning the core holding jig, and the clamp arm is linked downward via an engagement means, and the engagement means is provided on the upper half of the clamp arm and the outer part of the main body frame so that they engage with each other. The clamp arm is composed of a longitudinally elongated hole and a retaining pin, and the clamp arm has a cam portion formed in the lower part of the engaging means, and the eccentric portion is moved up and down by an eccentric portion that is deviated from the vertical center line of the elongated hole. The actuator is connected, and the core holding jig is clamped by the rotation of the clamp arm, and the cam part is brought into contact with the top surface of the core holding jig by the rotation of the cam part accompanying the opening operation of the clamp arm during unclamping. A core holding jig mounting device for a core setter, characterized in that the dowel fitting is released by making contact with the dowel.