JP3016627U - Repair tool - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a tool for smoothly pulling out parts such as bushes press-fitted into a predetermined hole. [Structure] A tap 1 to be screwed into a target component, a screw shaft 2 having a screw having the same rotation as the tap 1 and one end of which is screwed to the tap 1, and the other end of the screw shaft 2 The seat plate 3 is pierced through, the tightening nut 4 is screwed into the screw shaft 2 protruding from the seat plate 3, and the pair of support legs 5 and 5 fixed to both ends of the seat plate 3. The tap 1 is screwed to the component, the support leg 5 is attached to the edge of the hole in which the component is press-fitted,
Then, the component can be pulled out by tightening the tightening nut 4 screwed to the other end of the screw shaft 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a repair tool used for pulling out mainly bearing parts such as bushes and sleeves, and particularly to a repair tool useful for replacement work of bushes that support a propeller shaft of a ship.

[0002]

[Prior art]

 Generally, bearing parts such as bushes and sleeves are press-fitted into holes such as brackets and housings, and come into sliding contact with shafts and the like.

For example, in a ship S shown in FIG. 5, a propeller shaft R is provided on the bottom of the ship, and the propeller shaft R is press fitted into a hole of a pipe P called a stun tube as shown in FIG. It is rotatably supported by a bush B, which is a part of the product.

The bush B is called a biter and is made of a synthetic resin having a cylindrical shape, and has a function of preventing water from entering the ship. However, it is significantly worn due to friction with the propeller shaft R and must be replaced regularly. There is.

Conventionally, such kind of replacement work has been performed by cutting a cylindrical part, such as the bush B, which is press-fitted into a predetermined hole, with a certain width in the axial direction, and then clamping the part and cutting it in the circumferential direction. I was supposed to shrink it and pull it out.

[0006]

[Problems to be solved by the device]

 However, according to such a part replacement work, the work is extremely difficult because the cutting work is carried out by passing a saw or the like through the parts, and it takes about two hours, or in some cases, one time, until the replacement of the parts is completed. It had the drawback of taking days.

In addition, there is a risk of damaging other parts such as a bracket and a housing into which the component is press-fitted when the component is cut off.

In view of the above circumstances, the present invention is intended to enable a part such as a bush, which is press-fitted into a predetermined hole, to be quickly and easily withdrawn and to efficiently perform the replacement work. .

[0009]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention is a repair tool for pulling out a part press-fitted into a predetermined hole, which includes a tap screwed into the part and a screw having the same rotation as the tap. A screw shaft having one end screwed to the tap, a seat plate having the other end of the screw shaft penetrated, a tightening nut screwed to the screw shaft protruding from the seat plate, (EN) A repair tool having support legs fixed to both ends of a seat plate.

Particularly, in a preferred embodiment, the tap is formed with a right-hand thread, and the seat plate is provided with a long hole for varying the distance between the support legs according to the situation.

[0011]

[Action]

 According to the present invention, when a tap is screwed into a component such as a housing or a bracket that is press-fitted into a predetermined hole, the tap comes to firmly engage with the component. Then, screw one end of the screw shaft to the tap, and after the tip of the support leg is directed to the end face of the bracket holding the component, tighten it by screwing it to the other end of the screw shaft. Tightening the nuts with a spanner will allow the screw shaft to retreat in the axial direction with the seat plate and supporting legs as supports.

Therefore, the tap also moves backward in the direction of the seat plate in conjunction with the screw shaft, and acts so as to pull out the engaged parts. Therefore, the press-fitted parts can be smoothly pulled out.

In particular, since the tap and the screw shaft are formed with the screw of the same rotation, when the tightening nut is tightened, the tap does not separate from the component, and both are more firmly meshed with each other. In addition, since the long holes that allow the support legs to move are opened in the seat plate, the distance between the pair of support legs can be adjusted according to the size of the part to be pulled out.

It is preferable that the target component has a cylindrical shape because the tap is screwed in, but other components are also preliminarily opened with a drill or the like for screwing the tap. It can be pulled out.

[0015]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an exploded view of a repair tool of the present invention. In the figure, 1 tap, 2 is a screw shaft, 3 is a seat plate, 4 is a tightening nut, and 5 is a support leg.

The tap 1 is composed of a screw portion 11 and a handle portion 12, and the screw portion 11 is composed of a complete screw portion 11a having a cylindrical shape and an incomplete screw portion 11b having a tapered shape. Grooves 13 communicating from the upper end to the lower end are formed in the screw portion 11 at every 90 degrees so that chips can be discharged from the groove 13. Further, right-hand threads are formed on the outer peripheral surface of the screw portion 11 at a constant pitch. On the other hand, the handle portion 12 is a prism that projects from the upper end surface of the screw portion 11, and a screw hole 12a that is screwed with the screw shaft 2 is formed in the end surface.

The screw shaft 2 is formed with a series of screws having the same pitch as the screw holes 12 a from one end 21 to the other end 22. In particular, the screw is the same as the screw part 11 of the tap 1, that is, It is a right-hand screw. Then, one end 21 of the screw shaft 2 is screwed into the screw hole 12a of the tap 1 and the other end 22 is penetrated into the central portion of the seat plate 3.

The seat plate 3 has a rectangular plate shape as illustrated. A thrust bearing 31 is fitted in the central portion thereof, and elongated holes 32 are opened at both ends in the longitudinal direction. The other end 22 of the screw shaft 2 projects through the thrust bearing 31 to the front surface side of the seat plate 3, and the tightening nut 4 is screwed into the projecting portion via the washer 6.

The tightening nut 4 is a hexagonal nut, in particular, a hexagonal high nut in which a female screw having the same pitch as the screw shaft 2 is formed, and its end face is seated on a thrust bear ring 31 via a washer 6. The plate 3 is rotatably supported. Note that, as the tightening nut 4, a parallel hexagon nut, a square nut, a nut with a seat, or the like may be used.

On the other hand, the support leg 5 has a substantially rectangular plate shape as shown in the figure. In particular, a projecting mortise 51 is formed at the upper end thereof, and a screw hole 52 is formed in the end face of the mortise 51. The mortise 51 is inserted into the long hole 32 of the seat plate 3, and the screw 8 is screwed into the screw hole 52 of the mortise 51 from the front surface side of the seat plate 3 via the washer 7. At this time, the stepped portion 53 located under the hoso 51 is pressed against the back surface of the seat plate 3, and the washer 7 is supported by the side edge of the slot 32. Therefore, by tightening the screw 8, The support leg 5 can be fixed in a state orthogonal to the seat plate 3.

Next, FIG. 2 shows a cross section of a main part in a state in which the tool of the present invention is assembled. As is clear from this figure, a pedestal 15 made of synthetic resin having a convex cross section is fitted to the lower surface of the tap 1, and this is fixed by screws 16.

Further, a taper hole 33 is opened on the back surface of the seat plate 3 to facilitate the reception of the screw shaft 2. The taper hole 33 communicates with the thrust bearing 31, and the screw shaft 2 has the taper hole 33 and the thrust bearing 31. The seat plate 3 is penetrated in a state of loosely inserting.

On the other hand, the pair of support legs 5 and 5 are on both sides of the tap 1 and the screw shaft 2, and are fixed to the seat plate 3 by the screws 8 as described above, and by loosening the screws 8, the long holes 32, It is movable along 32 and its spacing can be freely adjusted as needed.

Next, a method of using the tool of the present application will be described with reference to FIGS. 3 to 4. In the drawings, P is a pipe for guiding a propeller shaft provided in a hull, and B is a hole H of the pipe P. It is a press-fitted cylindrical part, and the tap 1 is screwed into the part B as shown in FIG. The tap 1 is screwed in by winding the handle 12 with a wrench or the like, and at this time, the screw 11 is firmly engaged with the inner peripheral surface of the component B.

Therefore, as shown in FIG. 4, one end 21 of the screw shaft 2 is screwed to the tap 1, while the other end 22 is penetrated through the seat plate 3 and the other end 22 is tightened via the seat plate 3. Screw in the nut 4. On the other hand, after adjusting the distance between the support legs 5 and 5 according to the diameter of the pipe P and fixing them to the seat plate 3, the tips of the support legs 5 and 5 should be placed on the end surface of the pipe P as shown in the figure. To do.

Then, when the tightening nut 4 is tightened in this state, the tap 1 is pulled toward the seat plate 3 side through the screw shaft 2, and thus the component B is pulled out from the pipe P.

Although the embodiments of the present invention have been described above, it is desirable that various types of taps 1 having a threaded portion 11 having a diameter of 10 to 100 mm are provided so as to be compatible with various parts.

Further, according to the above-mentioned embodiment, the tap 1 and the screw shaft 2 are formed with the right-hand thread, but they may be formed with the left-hand thread.

Further, the tool of the present application is intended as a replacement part for withdrawal, particularly for a bush made of synthetic resin that rotatably supports the propeller shaft of the hull, but withdrawal of other parts press-fitted into a predetermined hole. Of course, it is also available.

[0030]

[Effect of device]

 According to the present invention, there is provided a repair tool for pulling out a component press-fitted into a predetermined hole, in which a tap screwed into the component and a screw having the same rotation as the tap are formed, and one end thereof is A screw shaft screwed to the tap, a seat plate through which the other end of the screw shaft penetrates, a tightening nut screwed to the screw shaft protruding from the seat plate, and both ends of the seat plate. Since it has a support leg that is fixed to the screw shaft, the support leg is placed on the edge of the bracket where the parts are press-fitted, and the screw nut is tightened through the screw shaft by a very simple work of tightening the tightening nut. Since the taps screwed onto the parts can be drawn, parts such as bushes that are press-fitted into the holes of the bracket can be quickly and easily pulled out.

For example, in replacing the bush that supports the propeller shaft of the hull, the work that took more than 2 hours was shortened to about 15 minutes, and the work efficiency could be significantly improved. In addition, at this time, since there is no need to cut off the parts, there is no risk of damaging parts other than the parts to be replaced.

Further, since the long holes are opened in the seat plate and the support legs are movable along the long holes, the distance between the support legs can be adjusted according to the size of the parts to be extracted, so that there are various types. The effect is that the parts can be pulled out.

[Brief description of drawings]

FIG. 1 is a perspective exploded view of a repair tool showing an embodiment of the present invention.

FIG. 2 is a sectional view of an essential part showing a state in which the repair tool is assembled.

FIG. 3 is a first process diagram showing an example of using the repair tool.

FIG. 4 is a second process diagram showing an example of using the repair tool.

FIG. 5 is a schematic side view showing a ship as an example of the application of the present invention.

6 is a sectional view taken along the line AA in FIG.

[Explanation of symbols]

 1 Tap 11 Screw Part 12 Handle 2 Screw Shaft 21 One End 22 Other End 3 Seat Plate 31 Thrust Bearing 32 Long Hole 4 Tightening Nut 5 Support Leg 51 Hozo

Claims (3)

[Scope of utility model registration request] 1. A repair tool for pulling out a component press-fitted into a predetermined hole, wherein a tap screwed into the component and a screw having the same rotation as the tap are formed and one end thereof is the tap. Screw shaft to be screwed to the screw shaft, a seat plate through which the other end of the screw shaft penetrates, a tightening nut screwed to the screw shaft protruding from the seat plate, and fixed to both ends of the seat plate. Repair tool equipped with the supported legs. 2. The repair tool according to claim 1, wherein the tap has a right-hand thread. 3. The repair tool according to claim 1, wherein a long hole is opened in the seat plate, and the support leg is movable along the long hole.