JP2586827Y2 - Replacement device for model surface plate - 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 exchanging a model surface plate and the like of a green sand molding machine used for manufacturing a mold in a foundry.

[0002]

Molding method using the BACKGROUND ART telescoping model plate for green sand molding machine, for example in a cassette box (or master plate) a of the molding machine as shown in FIG. 9, the model has been set a model b ₁ accommodating the platen c _1, are interposed distance pieces d ₁ between the model plate c ₁ and the cassette box a to adjust its height. b ₂ ,
Reference characters c ₂ and d ₂ denote other models, a model surface plate and a distance piece housed in the same cassette box a, and a common gate system is installed in these to form a green sand mold. Thus when removing the model plate c ₁ housed in the cassette box a is provided through separate extrusion pin e required point of the cassette box a (such as corners), the tip of the push-out pin e in removable from the cassette box a by pushing up the model plate c _1, the model plate c ₁ by using forklifts, have moved to the required position. When the distance pieces d ₁ and d ₂ in the cassette box a are to be removed, as shown in FIG. 10, the eye bolts f are screwed into the screw holes provided at the four corners in advance and lifted or hooked to the distance pieces. And a method of hanging up with a hole for hooking.

[0003]

However, the above-mentioned method of providing a screw hole or a hole for hooking a hook in the distance piece in order to replace the distance piece may cause the holes to be clogged with sand. Not only is it necessary to separately prepare tools such as eyebolts and set up hanging tools, but also troublesome work such as
The work was dangerous due to the unstable lifting structure.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an apparatus for exchanging a model surface plate that solves the above problems.

[0004]

According to the above object, according to the present invention, a distance piece is placed in a cassette box,
In a device in which a model surface plate is arranged thereon and the model surface plate is pushed out by an extrusion pin from below the cassette box, a rotatable disk is attached and held below the distance piece, and The problem has been solved by providing a part through which the push pin can be inserted.

[0005]

[Operation] According to the model surface plate changing device, when the disk is rotated to a predetermined position, the push-out pin stays on the model surface plate and can be pushed out. Further, when the disk is rotated to another position, the distance piece can be pushed out by the push pin and removed, so that the operation can be performed easily and safely.

[0006]

1 to 8, 1 is a distance piece, 2 is a disk, 3 is a fixed plate, 4 is a cassette box,
Denotes an extruding pin, and 6 denotes a model surface plate for an upper die.

In the distance piece 1 (see FIGS. 3 and 4), reference numeral 11 denotes a penetrating hole into which the rotating shaft of the disk 2 is inserted, 12 denotes a space into which the disk of the disk 2 is inserted, and 13
Reference numeral denotes another space into which the fixed plate 3 is inserted, and reference numeral 14 denotes a hole through which a pin 5 for pushing out the fixed plate is inserted. Holes and voids configured as described above are provided at four corners of the distance piece 1.

In the disk 2 (see FIGS. 5 and 6), 21
Is a rotary shaft fitted into the hole 11 of the distance piece 1, and 22 is a disk part fitted into the cavity 12. The disc portion 22 is formed at a position where the hole portion 23 having a chamfered upper and lower ends and another hole portion 24 are rotated at an appropriate interval, for example, 90 °, on the same circumference 22a around the rotation shaft 21. It is provided. The hole 24 has a size that allows the pin 5 for pushing out the model platen to be inserted, and the hole 23 is formed small so that the pin cannot be inserted. In addition, since the chamfer is provided at the lower end of the hole 23, the push pin 5 having a tapered tip at the tip can be fitted and positioned here, and lateral displacement can be prevented. Reference numeral 25 denotes a square hole such as a hexagon provided at the top of the rotating shaft 21, and reference numeral 25a denotes a pilot hole for forming the square hole 25. Reference numeral 26 denotes a plurality of holes with a bottom provided at regular intervals in the circumferential direction.
And a ball 28 are accommodated (see FIG. 1), and a thin plate 30 is interposed therebetween, so that the ball 28 is constantly pressed against the surface of the fixed platen 3 during assembly. For convenience, the holes 23 are provided so that they can be removed from the sand or can be visually recognized from above. The holes 23 need not necessarily be circular, and the holes need not be provided. Further, instead of the hole 24, the disk 2 may be a cut-out space.

In the fixed platen 3 (see FIGS. 7 and 8) 31
Is a hole through which the pin 5 is inserted, 32 is a plurality of conical recesses provided near the outer peripheral end of the upper surface of the fixed platen 3 at predetermined intervals, and 33 is a plurality of mounting holes. The hole 33 is provided on the outer peripheral side of the concave portion 32 with a counterbore. The hole 31 is arranged on the same circumference as the hole 23 and the hole 24 of the disk 2, and the recess 32 is arranged on the same circumference as the hole 26 provided on the turntable 2. . The hole 31
May be a notched space through which an extrusion pin can be inserted. After the disk 2 is inserted into the holes 11 and the cavities 12 of the distance piece 1, the fixing plate 3 is inserted into the cavities 13 of the distance piece 1, the mounting screws 35 are inserted into the mounting holes 33, and the fixing plate 3 is inserted. By fixing to the distance piece 1, the disk 2 is rotatably held in the distance piece 1 (see FIG. 1). Prior to the fitting of the fixed plate 3, the coil springs 27,
The board 30 and the ball 28 are stored. The hole 14 of the distance piece 1 and the hole 31 of the fixed board 3 are arranged on the same axis so that the pins 5 can be inserted vertically.

The present apparatus is used in the following manner. First, a case in which the model surface plate 6 above the distance piece 1 is removed from the cassette box 4 will be described. First, as shown in FIG. 2, a tool (not shown) such as a screwdriver is fitted into a square hole 25 on the upper surface of the rotating shaft 21 of the disk 2 that appears on the upper surface of the distance piece 1, and the disk 2 is leveled. Rotate the hole 2 of the disk 2 into the hole 14 on the distance piece 1
Match 4 This position is sensed by a sense of moderation caused by the ball 28 accommodated in the disk 2 falling into the recess 32 on the fixed disk 3. This operation is performed before setting the model surface plate 6 on the distance piece 1. In this state, the distance piece 1 and the disk 2
The holes for the push-out pins in the fixed platen 3 and the cassette box 4 are coaxially aligned. Therefore, when pushing out the model surface plate 6 from the cassette box 4, by pushing up the pins 5 from below, the press die surface plate 6 is pushed upward as shown in FIG. 2 and can be taken out from the cassette box 4.

Next, when the distance piece 1 is taken out of the cassette box 4, a screwdriver is fitted into a square hole 25 on the rotating shaft 21 of the disk 2 shown on the upper surface as shown in FIG. When the ball 2 is rotated by a predetermined angle (about 90 ° in this embodiment), the ball 28 that has fallen into the inverted conical recess 32 on the fixed board 3 rolls on the fixed board 3 again, and Stop depressed. In this state, the small-diameter hole 23 on the disk 2 is set between the distance piece 1 and the hole 31 on the fixed plate 3 so as to appear on the circular axis as shown in the figure. If the push-out pins 5 are pushed up in this state, the distance piece 1 and the fixed board 3 together with the disc 2 can be taken out of the cassette box 4.

[0012]

As described above, according to the exchange apparatus of the present invention, the distance plate is rotatably attached to and held on the distance piece, and the model surface plate housed in the cassette box by using the push-out pin. In addition, the distance piece can be appropriately pushed out and taken out.
Therefore, unlike the related art, there is no need to provide a screw hole or a hook hole for taking out the distance piece, and therefore, there is no need for problems such as sand jamming in those portions and tools such as eyebolts. Moreover, dangerous work associated with this can be avoided.

[Brief description of the drawings]

FIG. 1 is an explanatory cross-sectional view of a replacement device according to an embodiment of the present invention when a distance piece is pushed out.

FIG. 2 is an explanatory cross-sectional view when extruding a model surface plate in the apparatus of FIG. 1;

FIG. 3 is an explanatory plan view of one embodiment of the distance piece used in the exchange device of the present invention.

FIG. 4 is an explanatory view of a section AA of the distance piece shown in FIG. 3;

FIG. 5 is an explanatory view of a section taken along line BB shown in FIG. 6, which is an embodiment of the disk used in the exchange device of the present invention.

6 is an explanatory plan view of the disk shown in FIG. 5;

FIG. 7 is an explanatory view of a cross section taken along the line CC shown in FIG. 8, which is an embodiment of the fixed plate used in the exchange device of the present invention.

FIG. 8 is an explanatory plan view of the fixed board shown in FIG. 7;

FIG. 9 is an explanatory sectional view of a conventional exchange device.

FIG. 10 is an explanatory view of a conventional method for replacing a distance piece.

[Explanation of symbols]

 1 Distance piece 2 Disk 3 Fixed plate 4 Cassette box 5 Pin 6 Model surface plate

Continuation of the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B22C 23/00 B22C 7/04 B22C 21/06

Claims (3)

(57) [Scope of request for utility model registration] 1. An apparatus in which a distance piece is placed in a cassette box, a model surface plate is placed thereon, and the model surface plate is pushed out by an extrusion pin from below the cassette box. And a rotatable disk is attached and held, and a part of the disk is provided with a portion through which the push-out pin can be inserted. 2. The disk according to claim 1, wherein the disk has a rotating shaft that penetrates the distance piece and appears at an upper portion, and the rotating shaft has an engagement hole for a tool for rotating the disk. Model surface plate exchange device. 3. The disk according to claim 1, wherein the disk attached to the distance piece is held by a fixed disk provided with a cavity through which an extrusion pin is inserted, and the fixed disk is fixed to the distance piece. Model surface plate exchange device.