JPH028706Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a ring-shaped bushing replacement jig used for replacing the ring-shaped bushings of a vibrating conveyor.

[Conventional technology]

FIG. 1 shows an example of a vibratory conveyor that requires replacement of ring bushes.

In the same figure, a connecting cylinder 3 having a recessed part 3-1 is provided on both sides of a trough 1 serving as a conveyance path for the conveyed objects and a base 2 serving as a stand for a vibrating conveyor. Connecting tube 3
A rubber ring-shaped bushing 4 is press-fitted into the outer circumferential surface of the lever 5, and holes 5 provided at both ends of the lever 5 are formed on the outer circumferential surfaces of the ring-shaped bushings 4 of the trough 1 and the base 2.
-1 is press-fitted (see Figures 3 and 4).

The base 2 is installed on the floor or the ground via a spring 6, and a coil spring 7 is loaded between the trough 1 and the base 2.

Then, the rotation of the electric motor 8 attached to the base 2 is transmitted to the trough 1 as a known crank motion, and the trough 1 causes a high-speed reciprocating motion restrained by the lever 5 and vibrates.

At this time, the ring-shaped bush 4 has a function of alleviating the impact of the high-speed movement of the trough 1, but it deteriorates over time due to the operation of the vibrating conveyor, so it must be replaced periodically.

It is relatively easy to remove the ring-shaped bushing 4 that has deteriorated due to surface wear, but since the new ring-shaped bushing 4 is press-fitted into the connecting tube 3, installation is a difficult task that requires pressing force. and
There was a desire for a ring-shaped bushing replacement jig that would save installation work, but no suitable jig was available.

As a conventional technique for a jig for fitting a ring-shaped elastic body, there is a technique described in Japanese Utility Model Application Publication No. 59-116179.

According to this technology, when fitting an oil seal to the outer circumferential surface of a shaft member, a locking bolt is screwed into a screw hole screwed into the shaft core of the shaft member, and the locking bolt is screwed into the shaft. The pressing cylinder engaged with the head of the locking bolt is moved in the oil seal insertion direction, and the oil seal pressed by the pressing cylinder is press-fitted into the outer peripheral surface of the shaft member.

[The problem that the idea attempts to solve]

In order to press-fit the ring-shaped elastic body into the outer circumferential surface, it is appropriate to use a jig that presses the ring-shaped elastic body with a large pressing force using a bolt that is screwed into a screw hole. It cannot be used if there is no screw hole, such as in the connecting cylinder 3.

The present invention aims to solve this problem, and provides a jig capable of press-fitting an elastic ring-shaped bushing into a connecting cylinder without a screw hole.

[Means to solve the problem]

In order to achieve the above object, the ring-shaped bush replacement jig of the present invention includes a screw member whose tip is inserted into the inside of a connecting cylinder into which the inner circumferential surface of the ring-shaped bush press-fitted into the lever is press-fitted; It is formed into a cylindrical shape by an inner fixing member having a screw hole that is screwed into the screw member and a tapered outer peripheral surface, and a plurality of swinging pieces,
The screw member is loosely fitted into the hole, and one side of the hole has a tapered inner circumferential surface that can come into contact with the tapered outer circumferential surface of the inner fixing member, and the other side is swingable by a stop ring. The outer fixing member to be compressed, the nut for pushing the outer fixing member screwed into the screw member, and the outer diameter of the large diameter portion of the tapered outer circumferential surface fitted into the screw member are the same as the connecting cylinder. a guide member having an outer diameter approximately equal to the outer diameter of the ring-shaped bushing; a pushing member that is fitted into the threaded member and has a recessed portion for accommodating the guide member on one side and a side surface capable of pushing the ring-shaped bushing; Equipped with a nut for movement.

[Effect]

In order to fit the ring-shaped bushing into the connecting tube using the ring-shaped bushing replacement jig configured as described above, first, insert the inner fixing member, the outer fixing member, and the nut for pushing the outer fixing member into the coupling tube. Insert the screw member with attached and tighten the nut for pushing the outer fixing member to push the outer fixing member.
As the tapered inner circumferential surface of the pushed outer fixing member moves along the tapered outer circumferential surface of the inner fixing member, the swinging piece of the outer fixing member spreads outward using the stop ring as a fulcrum, and the swinging piece moves. Pressed against the inner surface of the connecting cylinder.

In this way, the screw member is fixed to the connecting cylinder.

On the other hand, a guide member fitted into the threaded member is brought into contact with the inner peripheral surface of the ring-shaped bushing press-fitted into the lever, and a pushing member that is in contact with the side surface of the ring-shaped bushing is screwed into the threaded member. When pushed by the pushing nut, the inner surface of the ring-shaped bush pushed by the pushing member moves from the guide member to the outer circumferential surface of the connecting tube and is press-fitted into the outer circumferential surface of the connecting tube.

After the ring-shaped bushing is press-fitted, turn the nut for pushing the outer fixing member to release the pressing force on the outer fixing member, the outer fixing member moves in the relaxing direction, and the connecting cylinder pressing force of the rocking piece is released. The screw member can now be removed from the connecting cylinder, and the installation work of the ring-shaped bushing is completed.

〔Example〕

Embodiments of the present invention will be described with reference to the drawings.

FIG. 5 shows a vertical cross-sectional view of the main parts of the connecting tube 3 and the ring-shaped bushing replacement jig for attaching the ring-shaped bushing 4 to the connecting tube 3.

The ring-shaped bush replacement jig includes a screw member 10, an inner fixing member 11, an outer fixing member 12, and a nut 13.
and 14, a guide member 15, and a pushing member 16.

The screw member 10 has a thread 10-1 on its outer peripheral surface, and preferably has a wrench engaging portion 10-2 at its rear end, which is the left side in FIG.

A screw head 10-3 is provided at the right end, but this can be omitted.

The inner fixing member 11 has an outer diameter that can be inserted into the recessed part 3-1 inside the connecting cylinder 3, and has a screw hole 11-1 in the center that is screwed into the screw member 10, and has a screw hole 11-1 in the center thereof, and 11-2 is formed into a tapered shape.

As shown in FIG. 6, the outer fixing member 12 is formed into a cylindrical shape by four swinging pieces 12-2, and a hole 12-3 loosely fits into the screw member 10. The tapered outer peripheral surface 11- on one side
A tapered inner peripheral surface that can come into contact with 2 is formed,
A groove is provided on the other side of the outer periphery, and the stop ring 12-1 is fitted into this groove.

Therefore, the four swinging pieces 12-2 are swingably clamped by the stop ring 12-1, and the outer fixing member pushing nut 13 screwed into the screw member 10 pushes the outer fixing member 12. When the swinging piece 12-2 moves, the swinging piece 12-2 comes into contact with the tapered outer circumferential surface 11-2 of the inner fixing member 11, and the knurling notch 12 carved on one side of the outer circumference of the swinging piece 12-2 hits. −
4 expands outward and comes into contact with the inner circumferential surface of the recessed portion 3-1 of the connecting cylinder 3.

The guide member 15 is provided with a hole 15-1 in the center through which the screw member 10 is inserted, and the outer diameter of the large diameter portion of the tapered outer peripheral surface 15-2 is the same as or similar to the outer diameter of the connecting tube 3. It is slightly larger in size.

The pushing member 16 is provided with a hole 16-1 in the center thereof through which the screw member 10 is inserted, and a thrust bearing 16-2 is provided at the end of the hole 16-1 with which the nut 14 for pushing the pushing member comes into contact. A recess 16-3 in which the guide member 15 can be accommodated is formed on the opposite side of the thrust bearing 16-2.
A side surface around which the ring-shaped bushing 4 can be pushed is formed on the side surface around -3.

Next, replacement of the ring-shaped bush 4 will be explained.

Lever 5 from connecting tube 3 of trough 1 and base 2
, pull out the old ring-shaped bushings 4 inserted into the coupling holes 5-1 on both sides of the lever 5, and insert new ring-shaped bushings 4 into the coupling holes 5-1, respectively.
Insert into.

The work up to this point can be done relatively easily.

Next, the ring-shaped bush 4 is press-fitted into the connecting cylinder 3 using a ring-shaped bush replacement jig.

First, as shown in FIG. 5, screw the inner fixing member 11 onto the screw member 10 from the large diameter side,
0-3 until the distance is about 5mm.

Next, after inserting the outer fixing member 12 into the screw member 10, the nut 13 is screwed together, and the nut 13 is screwed in to bring the outer fixing member 12 closer to the tapered outer circumferential surface 11-2 of the inner fixing member 11.

As shown in FIG. 7, the jig in this state is inserted into the recess 3-1 of the connecting cylinder 3 of the trough 1 and base 2, and the outer fixing member 12 is fixed to the inner fixing member 11 by turning the nut 13. When pressed against the stop ring 12-2, the swinging piece 12-2 in contact with the tapered outer peripheral surface 11-2 expands outward using the stop ring 12-1 as a fulcrum.
The notch 12-4 of the knurl of the rocking piece 12-2 presses against the inner peripheral surface of the recess 3-1 of the connecting cylinder 3 with a large pressing force, and the surface of the knurling notch 12-4 has a large sliding frictional resistance. The screw member 10 is firmly fixed to the connecting cylinder.

Next, the guide member 15 is press-fitted into the hole of the new ring-shaped bush 4 that has been press-fitted into the connecting hole 5-1, starting from the side with the smaller outer diameter of the tapered outer peripheral surface, and this guide member 15 is inserted into the connecting cylinder 3. It is inserted into the firmly fixed screw member 10.

Next, the pushing member 16 is inserted into the screw member 10 firmly fixed to the connecting cylinder 3, and the pushing member pushing nut 14 screwed into the screw member is screwed in to move the pushing member 16 along the imaginary line in FIG. Move to the specified position shown.

When the nut 14 is screwed in, the nut 14 contacts the thrust bearing 16-2 and rotates, so the pushing member 16 does not rotate under the rotational force of the nut 14.

The ring-shaped bush 4 pushed by the push-in member 16 remains inserted into the lever 5, and is inserted into the connecting cylinder 3.
It moves smoothly along the outer peripheral surface of the connecting cylinder 3 while being guided by the guide member 15 in contact with the connecting cylinder 3 (see FIG. 8).

Since the screw member 10 is firmly fixed to the connecting tube 3 via the inner fixing member 11 and the outer fixing member 12, the connecting tube 3 is firmly fixed in the process of screwing the nut 14.
There is no possibility of it falling away.

When the ring-shaped bushing 4 is inserted to the predetermined position shown by the imaginary line in FIG.
It is inserted in 6-3.

In order to remove the jig, the nut 13 may be loosened after the nut 14, the pushing member 16, and the guide member 15 are removed from the screw member 10.

However, in actual jig removal work, when the wrench engaging portion 10-2 of the screw member 10 is turned with a tool such as a spanner until the screw head 10-3 contacts the inner fixing member 11, the nut 13 is separated from the outer fixing member 12, the force of the outer fixing member 12 to push the inner fixing member 11 is lost, and the notch 12-4 of the knurling pushes the inner peripheral surface of the recessed part 3-1 of the connecting cylinder 3. The force was released and the jig could be easily pulled out from the connecting tube 3.

〔effect〕

Since the present invention is constructed as described above, it is possible to firmly fix the screw member 10 in a connecting cylinder without a screw hole, and the ring-shaped bushing can be guided to this screw member into the connecting cylinder. A new ring-shaped bush inserted into the lever can now be easily press-fitted into the connecting cylinder by installing a nut that pushes the guide member that presses the lever and the push-in member that comes into contact with the ring-shaped bush.

Further, the screw member fixed to the connecting tube can be easily removed from the connecting tube by loosening the nut to easily release the firm fixation.

The present invention is not limited to replacing the ring-shaped bushing of a vibrating conveyor; an elastic ring-shaped body is press-fitted onto the outer circumferential surface of a cylindrical body that does not have a screw hole, making it difficult to attach a replacement jig. It can be applied when

[Brief explanation of the drawing]

Figure 1 is a front view of the vibrating conveyor, Figure 2 is a side view of the vibrating conveyor, Figure 3 is a front view of the lever of the vibrating conveyor, Figure 4 is a plan view of Figure 3, and Figure 5 is a connecting cylinder and A partially cutaway front view of the ring-shaped bushing replacement jig, FIG. 6 is a view of the outer fixing member in FIG. FIG. 3... Connecting cylinder, 4... Ring-shaped bushing, 10
...Screw member, 11...Inner fixing member, 11-1
...screw hole, 11-2...tapered outer peripheral surface,
12... Outer fixing member, 12-1... Stop ring, 12-2... Rocking piece, 13, 14... Nut, 15... Guide member, 15-2... Outer peripheral surface, 1
6... Pushing member, 16-3... Recessed part.

Claims (1)

[Scope of utility model registration request] A screw member whose tip is inserted into the inside of a connecting cylinder into which the inner peripheral surface of a ring-shaped bushing press-fitted into the lever is press-fitted, and an inner fixing member having a screw hole to be screwed into the screw member and a tapered outer peripheral surface. and a tapered inner member formed into a cylindrical shape by a plurality of swinging pieces, into which the threaded member loosely fits, and which is capable of abutting the tapered outer peripheral surface of the inner fixing member on one side of the hole. an outer fixing member having a circumferential surface and whose other side is swingably pressed by a stop ring; a nut for pushing the outer fixing member that is screwed into the threaded member; and a tapered nut that is fitted into the threaded member. a guide member whose large diameter portion on the outer peripheral surface of the guide member has an outer diameter approximately equal to the outer diameter of the connecting cylinder; a recessed portion on one side for accommodating the guide member; and a side surface capable of pushing the ring-shaped bushing. A ring-shaped bush replacement jig comprising: a pushing member that is fitted into the screw member; and a nut for pushing the pushing member.