JP3659387B2 - Pressure roller replacement jig for foundry sand recycling equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pressure roller replacement jig for a casting sand reclaiming device that peels and removes deposits by frictional force by using a rotating drum and a rotating pressure roller to recover the foundry sand recovered after pouring. About.
[0002]
[Prior art]
Conventionally, a casting sand recycling apparatus as described above has been publicly known from JP-A-7-256390. The pressure roller used in such a molding sand recycling apparatus wears out after about 2000 to 10,000 hours depending on the properties of the molding sand to be regenerated, and therefore needs to be replaced each time.
As shown in FIG. 5, the pressure roller as described above generally has a horizontal hole 3 fitted in a rotation support shaft 2 provided horizontally above the rotary drum 1 in the center, and the horizontal hole 3 A support block which is formed by cutting a split groove 4 from the side portion to the outer side surface and tightening divided portions 5 and 6 separated vertically by the split groove 4 by a plurality of tightening bolts 7 and 7 in the vertical direction. A pressure roller 10 is rotatably attached to the lower portion of the body 8 via a support shaft 9.
[0003]
When the pressure roller 10 is exchanged, the rotary drum 1 is divided into two parts in the front and the rear, the front is opened, the fastening bolts 7 and 7 are loosened, and the support block body held on the rotary support shaft 2 After pulling 8 forward and taking it out of the apparatus, the pressure roller 10 was removed from the support shaft 9 and replaced with a new pressure roller 10.
[0004]
[Problems to be solved by the invention]
The pressure roller replacement operation as described above requires that the operator must handle heavy objects and remove the support block body and the pressure roller from the rotating support shaft and take them out of the apparatus. In addition, it was hard work and there was a problem in terms of safety.
The present invention has been made in view of the above problems, and an object thereof is to provide a replacement jig that can easily and safely replace a pressure roller in a foundry sand recycling apparatus in a short time. And
[0005]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the pressure roller replacement jig of the foundry sand recycling apparatus according to the present invention has a horizontal hole that fits in a horizontally provided rotating support shaft at the center, For a support block body of a pressure roller in which a split groove is cut from a side portion to an outer surface, and a divided portion separated vertically by the split groove is fastened by a plurality of fastening bolts;
A jig substrate provided with a plurality of cut portions for simultaneously inserting and engaging the screw rod portions of the plurality of fastening bolts at one end portion, and parallel to the arrangement of the plurality of cut portions on the upper surface of the other end of the jig substrate And a cylindrical body that is fixedly attached so that a horizontal portion of an L-shaped lever bar can be inserted, and is provided at the front and rear ends of the jig substrate and engages with the front and rear end surfaces of the support block body to move back and forth. And a stopper plate to be regulated.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. The pressure roller replacement jig according to the present invention corresponds to the foundry sand recycling apparatus of FIG.
FIG. 1 (a) is a plan view of a pressure roller replacement jig according to the present invention, and FIG. 1 (b) is a front view. The pressure roller replacement jig has a plurality of fastening bolts 7 at one end. , 7 are provided with a plurality of cut portions 11, 11 into which the screw rod portions 7A, 7A are inserted and engaged simultaneously, and a jig substrate 12 sized to correspond to the upper surface of the support block 8, and the jig substrate A cylindrical body 13 fixed to the upper end of the other end 12 in parallel with the arrangement of the plurality of cut portions 11 and 11 so that a horizontal portion of an L-shaped lever rod T (see FIG. 3) can be inserted; Stopper plates 14 and 14 are provided at the front and rear ends of the jig substrate 12 and engage with the front and rear end surfaces of the support block body 8 to restrict the front and rear movement.
[0007]
When the pressure roller 10 rotatably attached to the support shaft 9 is replaced, the bolts 7 and 7 in FIG. Slightly raise. As a result, the holding of the support block body 8 to the rotation support shaft 2 is loosened so that the support block body 8 can rotate about the rotation support shaft 2.
Next, the jig substrate 12 of FIG. 1 is placed on the upper surface of the support block body 8 of FIG. 2, and the notches 11 and 11 are engaged with the threaded rod portions 7A and 7A of the fastening bolts 7 and 7. Then, the horizontal portion of the L-shaped lever bar T is inserted into the cylindrical body 13 to be in the state shown in FIG.
[0008]
Next, the L-shaped lever rod T is rotated upward about the horizontal portion (no significant force is required due to the lever principle) to bring the pressure roller 10 to a position slightly higher than the upper end of the rotating drum 1. After the rotation, the transfer plate P is hung on the drum upper end position immediately below the pressure roller 10 in the rotary drum 1 and the push-up by the lever rod T is loosened, and the pressure roller 10 is placed on the transfer plate P. 4 is set.
Next, after tightening the tightening bolts 7 and 7, the support block body 8 is fixed to the rotation support shaft 2, the back plate P is forcibly removed.
[0009]
In this state, a bolt (not shown) that connects the support shaft 9 and the pressure roller 10 is loosened, the pressure roller 10 is removed, and a new pressure roller 10 is replaced and attached. 2 and slightly loosening the tightening bolts 7 and 7 and slowly lowering and rotating the lever rod T to return the pressure roller 10 to the state shown in FIG. 2 to support the lever rod T and the pressure roller replacement jig. The divided portions 5 and 6 of the support block body 8 are tightened up and down by the rear tightening bolts 7 and 7 removed from the upper surface of the block body 8, and the pressure block 10 Fix posture.
In the above embodiment, the cylindrical body 13 into which the L-shaped lever rod T is inserted extends to both the front and rear ends of the jig substrate 12, so that the lever rod T can be inserted from the openings at both ends, and the posture is reversed. It is possible to deal with the replacement of the other pressure roller.
[0010]
【The invention's effect】
As is apparent from the above description, the present invention provides a jig substrate provided with a plurality of cut portions for simultaneously inserting and engaging screw rod portions of a plurality of tightening bolts at one end portion, and the upper surface of the other end of the jig substrate. And a cylindrical body that can be inserted into the horizontal portion of the L-shaped lever rod, and provided at the front and rear ends of the jig substrate and engaged with the front and rear end surfaces of the support block body to restrict the front and rear movement thereof. With the stopper plate, the pressure roller can be easily and safely replaced using the lever principle without modifying the conventional foundry sand recycling apparatus.
[Brief description of the drawings]
FIG. 1 is a plan view (A) and a front view (B) of a pressure roller replacement jig.
FIG. 2 is a conceptual diagram of a main part of a foundry sand recycling apparatus showing a state in which a pressure roller replacement jig is mounted.
3 is an AA arrow view in FIG. 2;
FIG. 4 is a conceptual diagram of a main part of a foundry sand recycling apparatus showing a state in which a pressure roller is rotated.
FIG. 5 is a conceptual diagram of a main part of a foundry sand recycling apparatus.
[Explanation of symbols]
7 Tightening bolt 7A Screw rod portion 8 Support block body pressure roller 11 Cut portion 12 Jig substrate 13 Tube body 14 Stopper plate T

Claims (2)

A horizontal hole that fits into a horizontally provided pivot support shaft is drilled in the center, a split groove is cut from the side of the horizontal hole to the outer surface, and the divided parts separated vertically by the split groove are formed. For the pressure roller support block body which is tightened in the vertical direction by a plurality of tightening bolts;
A jig substrate (12) provided with a plurality of cut portions (11, 11) for simultaneously inserting and engaging the screw rod portions (7A, 7A) of the plurality of tightening bolts (7, 7) at one end portion; A cylindrical body fixed to the upper surface of the other end of the jig substrate (12) in parallel with the arrangement of the plurality of cut portions (11, 11) so that the horizontal portion of the L-shaped lever rod (T) can be inserted. (13) and stopper plates (14, 14) that are provided at the front and rear ends of the jig substrate (12) and engage with the front and rear end surfaces of the support block body (8) to restrict the front and rear movement. A pressing roller replacement jig for a foundry sand recycling apparatus. A cylindrical body (13) in which a horizontal portion of the L-shaped lever rod (T) can be inserted is provided at the other end of the jig substrate (12) so as to extend to both front and rear end faces. The jig for pressure roller exchange of the foundry sand recycling apparatus according to claim 1.

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