JPH0551572U - Extraction tool - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention relates to a pulling tool capable of easily and reliably pulling out one or several shaft fixing parts fixed to a shaft. [Constitution] The present invention locks a pair of chains at both ends,
And a pressure receiving plate having a screw tube portion in which a square screw is provided in a substantially central portion, and a square screw screwed into the screw tube portion of the pressure receiving plate.
Also, an operating rod having a bearing portion for receiving the shaft to which the shaft fixing part is fixed, a rotary operating portion for rotating the operating rod provided at the free end of the operating rod, and detachable from the pair of chains. Locking recesses to be locked at both ends, and a half-recessed annular recess into which approximately 1/2 of the shaft is loosely fitted is provided at substantially the center.
Moreover, the extraction tool is composed of a drawing plate provided with a drawing plane portion capable of applying a drawing force to the shaft fixing component.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention mainly describes shaft fixing parts (hereinafter, shaft fixing parts) such as pulleys, gears, bearings and the like that are fixedly attached to a mounting member such as a shaft and a rod (hereinafter referred to as a shaft). The number of shaft fixing parts is not limited.), And it can be easily and surely extracted.

[0002]

[Prior Art]

 Conventionally, the following technical documents have been cited as those relating to this seed cutting tool.

(1) There is an idea of a pulley extracting device of Japanese Utility Model Laid-Open No. 51-8600.

The present invention has a structure in which a support mechanism of a panda graph is attached to a pulley extracting mechanism composed of a claw, a fitting, and a connecting piece.

(2) There is a utility model for registering a punching tool in Japanese Utility Model Publication No. 58-45017.

This registered utility model has a means for engaging the outer peripheral surface of the boss portion of the shaft fixing component and a pressure receiving means for pressing the boss portion, even if there is no space around the outer periphery of the shaft fixing component. Only the space around the boss allows the parts to be pulled out.

(3) There is a registered utility model of the shaft exchange device of Japanese Utility Model Publication No. Sho 58-45019.

This registered utility model has a base having a receiving portion for receiving a bearing fitted to a shaft, a bar jig means for pressing the shaft, and the base while pressing the bar jig means. It is composed of a pushing rod means for removing the bearing by moving the table outward of the shaft.

[0009]

[Problems to be solved by the device]

 In the registered utility model of the above-mentioned technical literature, since the pressure receiving plate and the base (cylindrical body) of the shaft fixing part have an integrated structure, it takes time to store or carry the tool. Also, if there is an obstacle between the pressure receiving plate and the base, it will be difficult to use. Issues such as these can be considered.

In addition, the above-mentioned registered utility model has a large number of parts, which naturally complicates the structure. It may also cause a failure. Issues such as

[0011]

[Means for Solving the Problems]

 In view of the above, the present invention has a structure in which the extraction tool can be easily assembled and disassembled. In addition, it should be easy to store or carry. Further, it is an obstacle between the pressure receiving plate and the drawing plate (specifically, a gear, a bearing, etc., which is larger than the shaft fixing part, and a part of which has a gap through which the chain passes. The same applies hereinafter. ), The following structure was adopted in order to make it a versatile punching tool that can be used.

That is, according to the present invention, a pair of chains are locked at both ends through a locking tool, and a pressure receiving plate having a square screw threaded pipe portion at a substantially central portion, and a screw pipe of the pressure receiving plate. Actuating rod equipped with a square screw that is screwed to the shaft part, and a bearing part at the tip that receives a shaft to which several shaft fixing parts are fixed, and an operating rod provided at the free end of this operating bar. A rotation operation portion for rotation, locking recesses that are detachably locked to the pair of chains are provided at both ends, and a semi-recessed annular recess in which approximately 1/2 of the shaft is loosely fitted is provided at a substantially central portion. Moreover, the extraction tool is composed of a drawing plate having a drawing plane portion orthogonal to the axis.

Further, the present invention has a structure in which the pulling tool of the present invention can be installed immediately after conforming to the position of the shaft fixing part fixed to the shaft, so as to speed up the pulling work or simplify the work. Therefore, the following configuration is adopted.

That is, according to the present invention, a pair of chains are provided on a pressure receiving plate having a square screw threaded tube portion at a substantially central portion thereof, and the pressure receiving plate and about half of the shaft are provided through the pair of chains. The punching tool has a structure in which a semi-recessed annular recess to be loosely fitted is provided substantially in the center and a drawing plate having a drawing plane portion orthogonal to the axis is connected.

[0015]

[Action]

 Next, an example will be explained in the case where the shaft fixing component is extracted through the extraction tool of the present invention.

First, the shaft to which the shaft fixing component is fixed and the shaft fixing component are rusted off. Place the shaft fixing parts and the shaft, for which the rust has been removed, on the workbench.

Next, the rotation operating portion is rotated, for example, to the left, and the operating rod is returned, for example, to the full stroke.

Next, one end of the shaft is brought into contact with the bearing portion of the operating rod, and chains provided at both ends of the pressure receiving plate are extended in the longitudinal direction of the shaft.

After that, the semi-recessed annular recess of the pulling plate is loosely fitted to approximately 1/2 of the shaft (this is an example and is not limited in the present invention), and the shaft to be extracted is fixed to the shaft. Abut the extraction plate on the fixed part.

The free end side of each chain is locked in the recessed portions at both ends of the pulling plate thus arranged, and at the same time, the rotary operating portion of the operating rod is provisionally rotated to move the pressure receiving plate. Slightly move in the pulling direction to secure the tension of each chain.

As described above, in a state where each chain is tensioned, and each chain is securely locked in the locking recess of the extraction plate, or the extraction plate is securely connected to the shaft fixing component. Confirm that they are in contact with each other.

When the above confirmation is completed, the operating rod is then inserted into the pressure receiving plate (the bearing portion of the operating rod by means of a rotary tool such as a wrench, a monkey, etc., which is fitted or tightened on the rotary operation portion. Direction, the same hereafter).

As a result, the shaft is sequentially advanced in the direction of the drawing plate while the shaft fixing component is fixed.

At this time, since the bearing (for example, a thrust bearing) is internally provided in the bearing portion, the shaft fixing component can be easily pulled out without requiring much force.

Through this movement of the shaft, the shaft fixing component is sequentially displaced toward the end side of the shaft. Ultimately, however, the shaft is pulled out from the shaft in a state of penetrating the drawing plate. ..

Further, the shaft fixing component to be extracted is surely finished without being damaged.

When the above operation is completed, the tension state of each chain has already been released. Therefore, the pulling plate is removed from each chain, and the pulling plate is already released from the shaft. Remove it and place it on the workbench.

In addition, the pressure receiving plate, each chain, and the operating rod are, as a general rule, integrated, and are arranged on the work table as they are.

A spacer may be used when the bearing is brought into contact with or fitted to the shaft.

When there are several shaft fixing parts on the shaft, the above-described operations are repeated for each.

Further, when the extraction tool is to be housed, it can be housed or stored compactly in a case or the like in the disassembled state as described above.

The above-described operations or procedures are merely examples, and it goes without saying that the present invention is not limited to this example.

Further, by using the spacer, the extraction can be completed.

[0034]

【Example】

 Hereinafter, a detailed description will be given with reference to the drawings illustrating an embodiment of the present invention.

Reference numeral 1 denotes a plate-shaped pressure receiving plate, and a pair of chains 2 and 3 are locked to both ends of the pressure receiving plate 1 and are configured so as not to be removed via pins 4 and 5, for example. In addition, the free ends of the chains 2 and 3 are provided in a free state.

Reference numeral 6 denotes a square screw threaded tube portion (in the present invention, not necessarily limited to a square threaded screw; the same applies hereinafter) provided at a central portion of the pressure receiving plate 1. An operating rod 7 having a screw provided outside is screwed into the operating rod 7, and is rotated via a rotary operation portion 8 provided at one end of the operating rod 7.

Through the rotation of the rotation operation portion 8, the pressure receiving plate 1 is projected and retracted.

Reference numeral 9 denotes a bearing portion provided at the other end of the operating rod 8. The bearing portion 9 is inserted into the recess 9a as shown in FIG. 3 (which is an example and not limited to this example). A bearing 10 and a split pin 11 are provided on the thin shaft portion 8a of the operating rod 8 provided.

The bearing 9 has a lid 9b that covers the recess 9a of the bearing 9 and that is provided on the open side of the recess 9a (the side where the operating rod 8 is provided). By concealing the bearing 10 (this bearing 10 is connected to the operating rod 8 through the split pin 11), it is rotatably provided at the other end of the operating rod 8 without being removed. Has been.

As described above, the bearing portion 9 can of course be formed integrally with the operating rod 8.

Further, a bearing recess 9c is provided on the free end side of the bearing 9, and the shaft 13 or the spacer 14 abuts, fits or engages with the recess 9c as described above. Be done.

A pair of chains 2 and 3 are removably engaged with locking recesses 16 and 17 at both ends, and approximately ½ of the shaft 13 is loosely fitted into the central portion of the recess 15. , A semi-circular ring-shaped concave portion 18 at a substantially central portion thereof. The pull-out plate 15 is brought into contact with the shaft fixing part 20 fixed to the shaft 13 and is connected to the shaft fixing part 20. The pressure receiving plate 1 is provided with a pulling flat surface portion 19 which gives a pulling force.

Further, the pulling plate 15 is formed in a flat plate shape in order to apply the pulling force to the shaft fixing component 20 substantially uniformly, or to effectively deal with the shape or size of the shaft fixing component 20. Is ideal.

When the chains 2 and 3 are locked in the locking recesses 16 and 17 of the pull-out plate 15, the connecting portions of the chain links 2a and 3a (the head portions of the chain links 2a and 3a at the connecting and intersecting portions). ) Can be used reliably and easily.

FIG. 3 shows a state in which a bearing, which is an example of the shaft fixing component 20, is pulled out, and FIG. 4 shows a state in which a pulley, which is an example of the shaft fixing component 20, is pulled out. It is a figure.

[0046]

[Effect of the device]

 The present invention has the following effects by adopting the configuration described in detail above.

First of all, the present invention has an effect that the punching tool can be easily assembled and disassembled. It is also a very useful place because it can be easily stored or carried.

Secondly, the present invention is a versatile extraction tool that can be used even if there is an obstacle between the pressure receiving plate and the drawing plate.

Thirdly, the present invention has a large number of parts and can be expected to have a simple structure or simple use.

Fourthly, the present invention has a structure in which the pressure receiving plate and the drawing plate are connected via a chain, and can be used regardless of the shaft diameter or size of the shaft, the number of shaft fixing parts, and the like. It is an extremely versatile punching tool.

Fifthly, the present invention has a practical effect that a tool for pulling out can be immediately installed in conformity with the position of the shaft fixing part fixed to the shaft. It has the effect of speeding up or simplifying the work.

[Brief description of drawings]

FIG. 1 is an overall perspective view showing a process of locking a drawing plate on each chain.

FIG. 2 is an enlarged cross-sectional view showing a connection between an operating rod and a bearing portion.

FIG. 3 is a front view showing a usage state.

FIG. 4 is a perspective view showing another usage state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pressure receiving plate 2, 3 Chain 4, 5 pin 6 Square screw screw tube portion 7 Operating rod 8 Rotating operation portion 9 Bearing portion 10 Bearing 11 Split pin 13 Shaft 14 Spacer 15 Extraction plate 16, 17 Locking recessed portion 18 Half-recessed annular recessed portion 19 Pull-out flat plate part 20 Axis fixing parts

Claims (1)

[Scope of utility model registration request] 1. A pressure receiving plate which locks a pair of chains at both ends and which has a screw tube portion in which a square screw and other screws are internally provided, and a screw pipe portion of the pressure receiving plate. Square screw,
In addition, an operating rod equipped with a screw and having a bearing portion for receiving an attachment member such as a shaft and a rod to which shaft fixing parts such as pulleys, gears and bearings are fixed, and a free end of the operating rod. A rotary operating portion for rotating the operating rod, and locking recesses that are detachably locked to the pair of chains at both ends, and a semi-recessed annular recess into which approximately 1/2 of the mounting member is loosely fitted. A punching tool consisting of a pulling plate provided in the center.