JPH06126647A - Extracting device of bush - Google Patents

Abstract

PURPOSE:To provide an extracting device that is able to extract a bush inset in a cylindrical body so smoothly without entailing any scratch or the like for reusability. CONSTITUTION:A bolt inserting hole is formed in a position corresponding to a tapped hole made in a bush 16 and then a fixed member 17 with a recess for housing the bush 16, at external thread member being attached to a center part of the fixed member 17 free of rotation and extending toward the upper part while provided with a thread part and another tapped hole being provided with the tapped hole to be screwed in the external thread memberin a pierced state while corresponding to two bolt holes 20, 21 formed in the fixed member 17 are all made up. In addition, the tapped hole is screwed in the external thread part 18 and stacted on the fixed member while the tapped hole made in a position corresponding to the tapped hole of the fixed member and the bolts 20, 21 are interconnected to the bolt inserting hole of the fixed member 17 and the tapped hole of the bush 16 and screwed with each other, and the external thread member 18 is rotated, so that it is constituted from a lifting member extracting the bush 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retrieving device for smoothly reusing a bush fitted in a tubular body in a reusable manner.

[0002]

2. Description of the Related Art FIG. 4 is a view for explaining a conventional technique. For example, in a die casting machine, a cross section of a sliding shaft of a cylinder for injecting a melt of a die casting alloy into a mold and its cooling cover portion. It is a figure. That is, since the sliding shaft of the cylinder receives the high heat of the molten metal and causes defects such as deformation if it is left as it is, it is necessary to cool the sliding shaft.However, the sliding shaft is cooled by a cooling cover through which cooling water is passed. By surrounding the sliding shaft with. FIG. 4 is a cross-sectional view of the sliding shaft and the cooling cover portion. To explain the outline of the structure, 1 is the sliding shaft, 2 is the body of the cooling cover, and cooling water is injected from the cooling water inlet 3. Then, the sliding shaft 1 is cooled and drained from the drain 4. Also 5 and 6
Is a bush, and O-rings 7, 8, 9 and packings 10, 11 are fitted to the bushes 5 and 6 to prevent leakage of cooling water.

In the cooling cover 2 constructed as described above, the O-rings 7, 8 and 9 and the packings 10 and 11 fitted to prevent the leakage of the cooling water are easily exposed to high temperatures and deteriorate. Also, the sliding shaft 1 is replaced quite frequently due to wear and the like due to sliding. In this replacement, the bushes 5 and 6 need to be removed from the main body of the cooling cover 2, but the bush 6 on the right side of the drawing is relatively easy to remove, and no particular problem occurs. However, there is a problem in removing the bush 5 on the left side of the drawing. That is, when removing the bush 5, first, after removing the sliding shaft 1, the bush 6 and the packing 11 from the cooling cover 2, a tool such as a screwdriver is inserted from the hollow portion on the right side of the drawing to insert the bush 5. The tool is applied to the grooves 12 and 13 in which the O-ring 7 and the packing 10 are fitted, and is struck with a hammer or the like, and the bush 5 is gradually pushed out and pulled out.

However, the bush 5 is often made of a relatively soft member such as copper alloy, boron.
In the extraction method in which the driver is applied to the groove and hit hard, the shape of the groove is often deformed, or the member is missing in the thin portion such as the groove 12. is there. Even if a new O-ring or packing is fitted in order to use again such a bush with a missing member or a deformed groove, it may cause leakage of cooling water due to deterioration of the sealing property, and therefore the removal of the member Bushings that are missing or have grooves deformed cannot be reused in many cases.

[0005]

SUMMARY OF THE INVENTION The present invention was devised in view of the above-mentioned problems, and a bushing device which can be smoothly reused without scratches and the like is provided. It is intended to be provided.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is a device for extracting a bush which has been preliminarily screwed with a plurality of screw holes for extraction and which is fitted into a tubular body. A bushing insertion hole is formed at a position corresponding to a screw hole for extraction that is screwed into the bush, and a recess for accommodating the extracted bush is provided and a fitting portion of the bush is capped. A fixing member to be attached, a male screw member that is rotatably attached to the central portion of the fixing member, extends upward, and has a screw portion threaded on the extending portion, and is screwed to the male screw member. Screw hole is threaded in a penetrating state, and a screw hole is screwed at a position corresponding to an insertion hole of a bolt formed in the fixing member, and a screw hole screwed with the male screw member is screwed into the male screw member. Then, the bolt is communicated with the fixing member and screwed at a position corresponding to the screw hole of the fixing member, the bolt insertion hole of the fixing member, and the screw hole of the bush so that the bolt is screwed into the screw hole. , A lifting member for pulling out the bush by rotating the male screw member.

[0007]

[Operation] The elevating member is screwed onto the threaded portion of the male screw member of the fixing member, and the elevating member is stacked on the fixing member that is capped at the bushing fitting position of the cooling cover, and then the bolt is screwed into the screw hole of the elevating member. Then, the screwed bolt is inserted into the bolt insertion hole of the fixing member, and further inserted into the screw hole formed in the bush. In this state, when the male screw member is rotated, the elevating member screwed into the male screw member gradually rises above the fixing member, and as it rises, it communicates with the elevating member and the bush via the bolt insertion hole of the fixing member. Since the bolt that is screwed together also rises, the bush that is screwed into this bolt also rises from the fitting position and is pulled out.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 2 shows a device for extracting a bush according to the present invention.
FIG. 1 is a front view showing a state in which a bushing to be removed is capped at a fitting position and a main part is cut out, and FIG. 1 is a plan view showing a state in which a part is cut out. Further, FIG. 3 is a diagram illustrating a state in which the bush is pulled out by the bush pulling-out device according to the present invention. In the figure, 14
The present invention is a device for extracting such a bush, and the device 14 for extracting the bush includes a fixing member 17 which is capped at a position where the bush 16 of the cooling cover 15 is fitted, and a central portion of the fixing member 17 which extends upward. A male screw member 18 that is taken out and rotatably attached, an elevating member 19 that is screwed to the male screw member 18 and that is raised and lowered by rotating the male screw member 18, and bolts 20, 21, and 22 with hexagonal holes for removing bushes. Is roughly configured by.
Further, the bush 16 fitted in the cooling cover 15
In this embodiment, three screw holes for extraction 16a, 16b, 16c (not shown) are preliminarily threaded in this case.

In the above construction, the fixing member 17 has a recess 17a for accommodating the extracted bush 16 (see FIG. 3), and the screw hole 16 for extracting the bush 16 is provided.
Insertion holes 17b, 17c, 17d for bolts 20, 21, 22 are provided at positions corresponding to a, 16b, 16c (not shown).
(Not shown) is perforated. Furthermore, this fixing member 1
A male screw member 18, which is rotatable by a bearing 18a, extends upward at the central portion of 7 and is attached by a screw portion 18b. Denoted at 17e, 17f and 17g are tapped screw holes 16a and 16 threaded on the bush 16.
b and 16c (not shown) are threaded hole visual parts for removing the bushes that are cut so that they can be visually recognized in a state where the fixing member 17 is capped, and 17h is a pin insertion hole of the guide pin 23. Is. This guide pin 23 will be described later.
It guides the lifting / lowering of the lifting / lowering member 19 and serves as a detent for the lifting / lowering member 19.

The male screw member 18 rotatably attached to the fixing member 17 has a screw portion 18 at an upwardly extending portion.
c is formed, and further, a hexagonal wrench hole 18d is formed on the upper surface thereof.

The lifting member 19 is provided with a screw portion 19a which is screwed into a screw portion 18c which is screwed into the male screw member 18. The screw portion 19a is screwed into the male screw member 18 to fix the screw. Stacked on members 17. Further, corresponding to the insertion holes 17b, 17c, 17d (not shown) of the bolts 20, 21, 22 formed in the fixing member 17, therefore, the screw holes 16a, 16b for extraction which are also threaded on the bush 16 are formed. 16c (not shown) at the positions corresponding to the screw holes 19b, 19c, 19 of the bolts 20, 21, 22.
d (not shown) is threaded in a penetrating state. further,
An insertion hole 19e for the guide pin 23 is formed.

Bolts 20 for removing the bush 16;
Reference numerals 21 and 22 denote insertion holes 17 formed in the fixing member 17.
elevating member 1 through b, 17c, 17d (not shown)
9 and the screw holes 19b, 19c, 19d (not shown) and the screw holes 16a, 16b, 16c (not shown) for screwing, which are screwed into the bush 16, are screwed.

In the bush extracting device 14 having the above-described structure, first, the fixing member 17 is attached to the position where the bush 16 of the cooling cover 15 is fitted, and the male screw attached to the central portion of the fixing member 17. Member 18
The screw portion 19 a of the elevating member 19 is screwed into the screw portion 18 c of the elevating member 19 and the elevating member 19 is stacked on the fixing member 17. Next, the bush withdrawing screw holes 16a formed in the bush 16 at the bush withdrawing screw hole visual recognition portions 17e, 17f, 17g cut in the fixing member 17,
While visually observing 16b and 16c (not shown), the bolt 2
Screw holes 19 in which 0, 21, 22 are threaded on the elevating member 19.
b, 19c, 19d (not shown), and then
The bolts 20, 21, 22 are inserted into the through holes 17b, 17c, 17d (not shown) formed in the fixing member 17 so that the bush 16 is extracted with screw holes 16a, 16d.
b, 16c (not shown). The guide pin 23 is inserted into the guide pin insertion hole 19e formed in the elevating member 19 and the guide pin insertion hole 17h formed in the fixing member 17 before or after screwing the bolts 20, 21, 22 as appropriate. I'll do it.

In FIG. 2, bolts 20 and 2 are inserted into screw holes 16a, 16b and 16c (not shown) for extracting the bush 16.
1 and 22 are screwed together to show a state in which the setting for removing the bush 16 is completed.

As described above, when the hexagonal wrench (not shown) is inserted into the hexagonal wrench hole 18d on the upper surface of the male screw member 18 and the male screw member 18 is rotated in a state where the setting for removing the bush 16 is completed, the male screw member 18 is rotated. The elevating member 19 that is screwed onto the screw 18 gradually rises as the male screw member 18 rotates. In this case, since the guide pin 23 as a rotation stopper is attached, the male screw member 18
Even if is rotated, the elevating member 19 does not rotate and ascends along the thread of the male screw member 18 to be screwed. A bolt 2 that is screwed onto the lifting member 19 when the lifting member 19 rises.
0, 21, 22 are bolt insertion holes 17 of the fixing member 17.
b, 17c, 17d (not shown)
Since the bush 16 is screwed on, the bush 16 gradually rises and is eventually pulled out from the fitting position of the cooling cover 15. FIG. 3 shows a state in which the extracted bush 16 is stored in the recess 17 a of the fixing member 17.

As described above, the male screw member 18 is arranged at the central portion of the bolts 20, 21, 22 so that the ascending force of the male screw member 18 is increased by the surrounding bolts 20, 21 ,.
The bushes are extracted by being evenly distributed over 23. Further, the bolts 20, 21, 22 are screwed to both the bush 16 to be pulled out and the elevating member 19, and by this screwing to both, a force for pulling out is applied from the screwed position of the bush 16. The strokes of the bolts 20, 21, 23 up to the screwing position of the elevating member 19 are always constant for all three bolts. That is, as long as the bolts 20, 21, 22 are screwed into both the bush 16 and the elevating member 19, how to tighten the bolts 20, 21, 23, that is, the strength and shallowness of the tightening of the bolts, does not matter. Instead, a uniform force is distributed to each bolt 20, 21, 22 and the bush 16 is pulled out.

[0017]

As described above, according to the present invention, the bush can be smoothly removed so that it can be reused while the force for removing the bush is distributed in a well-balanced manner without being biased to a specific portion. It is possible to realize a bush extracting device that can perform

[Brief description of drawings]

FIG. 1 is a plan view in which a part of a device for extracting a bush according to the present invention is cut away.

FIG. 2 is a front view in which the bush extracting device according to the present invention is capped at the fitting position of the bush to be removed and the main portion is cut away.

FIG. 3 is a view showing a state in which the extracted bush is stored in a concave portion of a fixing member.

FIG. 4 is a cross-sectional view for explaining a conventional example.

[Explanation of symbols]

 14, Bush Extractor 15, Cooling Cover 16, Bush 17, Fixing Member 18, Male Screw Member 19, Elevating Member 20-22, Bolt

Claims (1)

[Claims] 1. An extraction device for extracting a bush fitted in a tubular body, wherein a plurality of extraction screw holes are preliminarily screw-threaded, the extraction screw hole being screw-threaded in the bush. A fixing member having a bolt insertion hole formed at a position corresponding to and having a recess for accommodating the extracted bush, and a fixing member crowned to the fitting portion of the bush, and rotatable at the center of the fixing member. A male screw member that is attached to the male screw member and that extends upward and that has a threaded portion threaded on the extending portion; and a screw hole that engages with the male screw member that is threaded in a penetrating state and that is formed on the fixing member. A screw hole is threaded at a position corresponding to the insertion hole of the bolt, and a screw hole which is screwed with the male screw member is screwed with the male screw member to be stacked on the fixing member and a screw of the fixing member. A bolt is communicated with a screw hole screwed in a position corresponding to the hole, a bolt insertion hole of the fixing member, and a screw hole of the bush to be screwed together.
A bush removing device, comprising: an elevating member that pulls out the bush by rotating the male screw member.