JPS6233018B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a foundry sand hopper device movable in vertical and horizontal planes.

Normally, the molding sand hopper is fixedly installed above the molding position, so when replenishing the molding sand, it is necessary to lift the molding sand to an upper position using a belt conveyor, bucket elevator, or the like. This resulted in problems such as high equipment costs and the need for a large installation area. In addition, when there are two or more molding positions, a hopper must be provided at each molding position, which increases equipment costs.Furthermore, as the frame height and model height change, the hopper height must be adjusted accordingly. Even if you need to change the
Since the height of the hopper could not be adjusted, there were various problems such as difficulty in properly pouring sand into the flask. The present invention has been developed in view of these problems, and is a hopper that can supply molding sand to multiple molding positions with a single hopper, and can also easily supply molding sand to the hopper. The purpose is to provide a device.

The configuration of the present invention will be explained below based on examples. Reference numeral 1 denotes a support stand fixed on a foundation, in the center of which a rotary vertical shaft 2 is rotatably supported by a bearing (not shown), and a stepped part 2a is fitted into a recess on the upper surface of the support stand 1. A table 3 having a rectangular planar shape is fitted to the upper end of the rotary vertical shaft 2 which is directly supported and projects upward, and a driven gear 4 is fitted to the lower part of the table 3.

Further, a deceleration motor 5 with a brake is mounted upward on the side surface of the support base 1, and a drive gear 6 is fitted onto the motor shaft 5a and meshed with the driven gear 4. On the top surface of the table 3,
A pair of guide rails 7 with grooves 7a facing inward are erected facing each other at a predetermined interval, and between the pair of guide rails 7, there are three guide rails 7 at approximately equal intervals in the vertical direction. Connecting members 8, 8a, and 8b are horizontally suspended, and the guide rail 7 is reinforced to prevent it from falling. Reference numeral 9 denotes an elevating cylinder attached upward to the connecting members 8 and 8a, and a channel-shaped support member 11 is fixed to the tip of the piston rod 9a via a rod member 10, and on both opposing wall surfaces of the support member 11. , a chain wheel 12 is rotatably supported on each. Reference numeral 13 denotes an elevating cart, and the elevating cart 13 includes a U-shaped cart member 14, and two horizontal members 15b that are attached to the front surface of the U-shaped cart member 15 through a vertical member 15a and protrude from the front surface of the vertical member 15a. and a fork-shaped support arm 15, the base end of which is suspended from the tip of a chain band 16 that is hung around a chain wheel 12 fixed to the connecting member 8a. Lifting cart 13 configured in this way
The carriage member 14 is moved by the operation of the lifting cylinder 9.
It is designed to be moved up and down in the vertical direction along the guide rail 7 via wheels 17 rotatably supported on both opposing wall surfaces. In addition, small diameter wheels 19 are rotatably supported on both opposing wall surfaces of the truck member 14 via roller receivers 18 to prevent the elevating truck 13 from wobbling laterally. Reference numeral 20 denotes a foundry sand hopper having a flange portion 20a protruding from its outer periphery, and is suspended and supported on the upper surface of the horizontal arm 15 via the flange portion 20a. With this structure, when the lifting cylinder 9 is pushed out and operated in the state shown in FIG. The lifted/lowered cart 13 has wheels 17,1
9 is lifted vertically without lateral vibration while being guided by the side and lower surfaces of the groove 7a of the guide rail 7, and by stopping the lifting cylinder 9 in the middle,
The elevating cart 13 can be stopped at any position. Further, when the lifting carriage 13 is lowered, the lifting cylinder 9 is operated in the reverse direction so that the chain band 16 is loosened and lowered by its own weight.

In this case, since the moving distance of the lifting truck 13 is twice the operating stroke of the lifting cylinder 9, the lifting cylinder 9 can be shortened accordingly, and the entire device can be made compact.

Next, when the brake-equipped deceleration motor 5 is operated, the table 3 is moved to the guide rail 7 and the lifting cart 13 via the driving gear 6, the driven gear 4, and the rotating vertical shaft 2.
When the hopper 20 reaches a predetermined position, the motor 5 is turned off, and the brake attached to the motor 5 is instantly activated to stop the table 3 at the predetermined position, and the table 3 is moved into the lower frame. Sand will be poured.

Incidentally, the lifting and lowering of the lifting cart 13, starting and stopping the rotation may be performed manually, or may be performed automatically by a detection signal from a limit switch or the like. In short, the present invention has a structure in which an elevating cart with a hopper supported by a support arm is provided so as to be rotatable around a rotating vertical axis and also to be able to be raised and lowered. In addition to being able to replenish molding sand, the height of the hopper can be adjusted to any position even if the frame height or model height changes.
Since it can be set, molding conditions are improved, and furthermore, when replenishing the hopper with molding sand, it has excellent effects such as not requiring a belt conveyor or bucket elevator, etc., and contributes to this type of industry. The effect is extremely significant.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing an embodiment of the present invention, Fig. 2 is a partially cutaway plan view taken along the line A-A in Fig. 1, and Fig. 3 is a partially cutaway plan view taken along the line B-B in Fig. 1. Cross-sectional view.
FIG. 4 is a view taken along the line C--C in FIG. 1. 2: Rotating vertical axis, 13: Elevating trolley, 15: Support arm, 20: Hopper.

Claims (1)

[Claims] 1 Rotatably supports a rotating vertical shaft 2 on a support base 1,
A table 3 and a driven gear 4 are fitted onto the rotating vertical shaft 2, and a driving gear 6 that meshes with the driven gear 4 is attached to the side surface of the support base 1, which is connected to a motor shaft 5a.
Attach the deceleration motor 5 with brake fitted to the
On the upper surface of the table 3, two guide rails 7, 7 with their grooves 7a facing inward are arranged facing each other with a predetermined distance maintained between them.
Connecting members 8, 8a are installed between them, and an upward lifting cylinder 9 is attached to the connecting members 8, 8a.
A chain wheel 12 is pivotally supported at the tip of the piston rod 9a of the lifting cylinder 9, and a chain wheel 12 is provided between the guide rails 7, 7 to lift and lower the piston rod 9 to the guide rails 7, 7 via a wheel 17 that engages with the groove 7a. A support arm 15 protruding from the truck member 14 and the truck member 14
An elevating cart 13 consisting of Hopper 2 at the tip of 15
A hopper device characterized in that it supports 0.