JP3290694B2 - Automatic work transfer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for automatically transferring a sand core .

[0002]

2. Description of the Related Art As an automatic transfer apparatus for a work, as disclosed in Japanese Utility Model Laid-Open No. 61-97356 and Japanese Utility Model Laid-Open No. 63-170066, a cast product or the like positioned on a pallet or a transfer device is known. In general, the work described above is sandwiched between chuck claws and transferred to a transfer device in the next step.

[0003]

In the above-described conventional transfer apparatus, since the work is held by the chuck claws, it cannot be applied to the case where the work is easily broken like a sand core. Therefore, means for transferring the work by sucking the work with the suction pad is also conceivable. However, in the case of a porous material such as a sand core that allows air to pass through, the work will fall unless it is strongly sucked. For this reason, the work must be suctioned using a large number of suction pads, which complicates the structure of the apparatus.

[0004]

Means for Solving the Problems The present invention to solve the above problems, the sand in each of the delivery side and receiving side of the sand core
A core holding member is arranged, these sand core holding members can be relatively approached and separated from each other, and each of the sand core holding members has an internal space as a decompression chamber and an annular partition wall is provided on the opposing surface. When a seal member is attached to the tip end surface of the partition wall and the seal member is pressed against the surface of the sand core , the seal member is shielded from the outside between the opposing surface of the sand core holding member and the surface of the sand core ; An adsorption space communicating with the decompression chamber through the hole is formed. Further, on the opposing faces of each of the sand core holding member provided outside the projections barrier rib sand core set, also provided on at least one of the bringer and receiver of sand core holding member sand core A cushion for cushioning was attached to the protrusion for sand core set. Then, the receiving core is moved toward the receiving-side sand core holding member where the sand core is sucked and held.
Sand core holding member is advanced a sand core is sandwiched between the sand core holding member, to stop the suction of the bringer, receives aspirated starting sand core is receiving the side of the sand core The holding member is held by the suction space. Then, the other party to the opposing surface outer periphery of at least one of sand core holding member in sand
A skirt portion extending toward the child holding member is provided, and the skirt portion has a slight gap between the sand core holding member and the opposing surface when the sand core holding member is in contact with the sand core member. Was formed.

[0005]

[Action] pallets sand core <br/> being positioned set sucked and held by the sand core holding member delivery side, of the then turn in direction to bringer of sand core holding member and the receiving sand The sand core is sucked and held by the sand core holding member on the receiving side and the suction of the sand core holding member on the delivery side is released to release the sand core. Hand over.

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a whole front view of an automatic transfer device for sand core according to the present invention, partially cross-sectional view showing the transfer between 2 palette and sand core holding member, FIG. 3 in the sand shows an array of child, 4 partial sectional view showing a sand core holding member of the delivery side and receiving side, Fig. 5 a-a direction arrow view of FIG. 4,
FIG. 6 is a view taken in the direction of arrows BB in FIG.

First, an overall configuration of an automatic sand core transfer device will be described with reference to FIG. In the automatic sand core transfer apparatus, a frame 1 is erected on a floor, a moving body 3 is provided on the frame 1 to move along a guide rod 2, and an arm 4 is attached to the moving body 3, Sand on the delivery side at the tip of 4
The core holding member 5 is moved to the shaft 7 by the operation of the cylinder unit 6.
Is mounted so as to be rotatable around the center.

A moving body 9 is movably mounted on a rail 8 provided on the frame 1, and the moving body 9 is
An upper end of an arm 11 is screwed into the ball screw 10, and a receiving side holding member 12 having substantially the same structure as the sand core holding member 5 is attached to a lower end of the arm 11.

On the other hand, a lifter 13 is arranged on the floor,
The lifter 13 raises and lowers the pallet 14. A sand core positioning member 15 is attached to the pallet 14 as shown in FIG.
A plurality of sand cores W are positioned and set at. Here, the arrangement of the sand cores W on the pallet 14 is such that the center of the four sand cores W is located at the top of the trapezoid as shown in FIG. This is because when the four cores W were set in the mold in the same manner and the product was cast, the air vent holes from the bottom core W were set upward.
This is to prevent interference with the portion of the sand core W.

As shown in FIGS. 2 and 4, the transfer-side sand core holding member 5 has a pressure reducing chamber 16 connected to a vacuum pump or the like, and the receiving-side sand core holding member 12 has a structure as shown in FIGS.
An annular set protrusion 18 for positioning the sand core W is provided on the facing surface 17 of the transfer-side sand core holding member 5 facing the transfer side, and a cushioning material 19 is provided on the distal end surface of the set protrusion 18.
Are mounted at intervals in the circumferential direction.

An annular partition wall 20 is provided inside the setting projection 18, and a seal ring 21 is attached to a tip end surface of the partition wall 20. When the seal ring 21 on the front end surface is pressed against the back surface of the sand core W, the partition wall 20 is cut off from the outside between the opposing surface 17 of the sand core holding member 5 and the back surface of the sand core W and has a hole 22. Through the decompression chamber 1
A suction space S1 communicating with 6 is formed.

On the other hand, the sand core holding member 12 on the receiving side
The internal space is a decompression chamber 23, a setting projection 25 is provided on the facing surface 24, and a seal ring 2 is provided inside the setting projection 25.
A suction wall S2 surrounded by the partition wall 27 is communicated with the decompression chamber 23 through a plurality of holes 28. However, no cushioning material is attached to the end face of the setting projection 25 of the sand core holding member 12 on the receiving side. this is,
Since the buffering material 19 is attached to the setting projection 18 of the sand core holding member 5 on the delivery side, the buffering material 19 exerts a buffering effect at the time of delivery. In particular, the setting projection 25 on the receiving side. This is because there is no need to provide them.

Further, skirt portions 5a and 12a are provided on the outer peripheral portions of the facing surfaces 17 and 24 of the sand core holding members 5 and 12 on the delivery side and the receiving side, respectively. The dimensions of the skirt portions 5a, 12a are such that the sand core holding members 5, 12 are made of sand.
The dimension is such that a slight gap t is formed between the core W and the skirt of the other party in contact with the core W therebetween.

[0014] sand was so as to form such a gap t, when the sand core W is sand core, since the air is sucked through the sand core W, upon delivery and no gap t This is because the space between the core holding members 5 and 12 becomes vacuum, and it becomes difficult to separate the sand core holding members 5 and 12. Further, even if one of the sand core holding members 12 is moved in the closing direction excessively, the gap between the gaps t hits the skirt 5a of the other party before the sand core W collapses, that is, the thickness direction of the cushioning material 19. Is preferably smaller than the deformation amount. The shape of the skirt does not have to be cylindrical ,
The skirt portion may be provided only on the child holding member.

The operation of the automatic sand core transfer device having the above-described configuration will be described below. First, positions the sand core holding member 5 of the delivery side to the upper side of the pallet 14 as shown in FIG. 1, occupies made a compression movement from this state to the cylinder unit 6, the sand core holding member as shown in the FIG. 2 5 opposing surfaces 1
7 is turned to the pallet 14.

Next, the pallet 1 is lifted by the lifter 13.
4 is raised, and the periphery of the sand core W is pressed against the cushioning material 19 of the setting projection 18 as shown by the imaginary line in FIG. Then, at this time, the center of the back surface of the sand core W is also pressed against the seal ring 21 of the partition wall 20, and the suction space S1 is formed.
Then, when the lifter 13 is lowered, the sand core W is adsorbed and retained on the holding member 5 side.

After that, the cylinder unit 6 is caused to protrude to hold the sand core W in a vertical state, and the sand core holding member 5 is moved to a position facing the other sand core holding member 12. Then, the ball screw 10 is rotated to advance the receiving-side sand core holding member 12 toward the sand core holding member 5, and the sand core W is moved to the setting projections 18, of the two holding members 5, 12. Hold between 25.

Then, the suction on the delivery side is stopped while being sandwiched between the setting projections 18 and 25, and the suction on the reception side is started. Then, the sand core W is held by the suction space S2 of the sand core holding member 12 on the receiving side. Thereafter, the receiving-side sand core holding member 12 retreats while holding the sand core W, further moves along the rail 8 to the casting apparatus, and sets the sand core in the mold.

[0019] Incidentally, the partition wall In the illustrated embodiment has been arranged to position side of the projection for sand core set, and also serves as a projection for sand core cell <br/> Tsu bets by partitions Is also good.

[0020]

According to the present invention as described above,
A relatively large space decompressed by the partition wall is formed between the opposing surface of the sand core holding member and the back surface of the sand core.
Since so as to suck and hold the sand core can be reliably transferred even sand core as easy addition air fragile as sand core will through.

Further, since attaching the cushioning cushion sand core set <br/> preparative protrusion provided on the sand core holding member, the sand core in setting or transferring the sand core collapse can be prevented, by further respective sand core holding member provided skirt sized to form a slight gap between the other party while abutting across the sand core, the sand core There is no difficulty in separating the sand core holding members from each other due to the vacuum between the holding members, and it is possible to prevent the collapse of the sand core even if one of the sand core holding members moves excessively. .

[Brief description of the drawings]

FIG. 1 is an overall front view of an automatic sand core transfer device according to the present invention.

FIG. 2 is a partial cross-sectional view showing delivery between a pallet and a sand core holding member.

FIG. 3 is a diagram showing an arrangement of sand cores .

FIG. 4 is a partial sectional view showing a sand core holding member on a delivery side and a receiving side.

FIG. 5 is a view taken in the direction of arrows AA in FIG. 4;

FIG. 6 is a view taken in the direction of arrows BB in FIG. 4;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Frame, 5 ... Sand core holding member on delivery side, 12 ...
Sand core holding members on the receiving side, 16, 23 ... decompression chamber, 1
7, 24 ... facing surface, 18, 25 ... set projection, 19 ...
Buffer material, 20, 27 ... partition, 21, 26 ... seal ring, 22, 28 ... hole, W ... sand core .

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Ken Ikeda 2-1-1 Minami-Aoyama, Minato-ku, Tokyo Honda Motor Co., Ltd. (56) References JP-A-61-217498 (JP, A) (58) Field surveyed (Int.Cl. ⁷ , DB name) B65G 47/91 B25J 15/06

Claims (1)

(57) [Claims] 1. A in each of the delivery side and receiving side of the sand core disposed sand core holding member, these sand core holding member is capable relatively approach and separate from, and respectively in the sand
Child holding member is an inner space and the decompression chamber, the partition wall forming the annular provided on the opposite surface, attaching the sealing member to the distal end surface of the partition wall, when pressed against the sealing member to the surface of the sand core, sand
An adsorption space is provided between the opposed surface of the core holding member and the surface of the sand core , which is isolated from the outside and communicates with the decompression chamber through a hole, and is formed in the opposed surface of each of the sand core holding members. Is
Sand core set projection is provided on the outside of the partition wall, also in sand
A cushion for cushioning is attached to a sand core set projection provided on at least one of the sand core holding members on the transfer side and the receiving side of the child , and a counter cushion is provided on the outer periphery of the facing surface of at least one of the sand core holding members. sand sand core holding member skirt portion is provided extending toward, the skirt of each
A structure in which a small gap is formed between the core holding member and the opposing skirt portion or the opposing surface in a state where the core holding member is in contact with the sand core interposed therebetween, and the delivery in which the sand core is attracted and held. towards sand core holding member side to advance the sand core holding <br/> support member of said receiving-side sand core is sandwiched between both the sand core holding member, stops the suction of the bringer and sand, characterized by being configured to be held by the suction space of the receiving sand core holding member of the suction was initiated sand core is receiving the
Automatic core transfer device.