JPH09314479A - Drawing device for positioning pin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily draw a positioning pin with small labor and to simplify the structure thereof. SOLUTION: A drawing device 11 comprises a holder 12 in which a female screw part 22 is formed on an inner circumferential surface of a hollow part, a rotary body 13 in which a male screw part 30 to be screwed in the holder is formed on an outer circumferential surface, a torque receiving part 31 with which an impact wrench 60 is engaged is provided on an upper end projected from the holder, and a thrust bearing 14 is provided in the middle of the hollow part, and a shaft member 17 in which a male screw 41 to be connected to a positioning pin 20 is formed on a tip of a shaft part 16 extended from a head part 15 to be supported by the thrust bearing, and a shaft member 17 in which a rotary tool engagement part 40 capable of being engaged with a hexagonal wrench inserted from a hole open in the torque receiving part is formed on the head part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a positioning pin pulling device used for pulling out a positioning pin (knock pin) driven into a steel material in order to align the positions of two parts.

[0002]

2. Description of the Related Art Conventional tools for pulling out a positioning pin are roughly classified into a hand tool and an air tool.

As shown in FIG. 4, a typical manual tool has a long shaft 3 having a male screw 1 at its tip and a collar 2 at its rear end, and a long shaft 3 penetrating this shaft. It is composed of a cylindrical hammer 4. In order to pull out with this tool, the tip of the shaft 3 is screwed into the female screw 6 of the positioning pin 5, and in this state the hammer 4 is manually moved upward to move the collar 2
Repeatedly abut, and pull out using the impact force at this time.

Further, as shown in FIG. 5, a typical air tool is provided with a hammer 7 which moves up and down by the force of compressed air inside a tool body 8, and the tool body 8 has a male screw at its tip. A shaft 10 forming a 9 is attached. To pull out using this tool, as in the case of the above-mentioned manual tool, the male screw 9 at the tip of the shaft 10 is screwed into the female screw 6 of the positioning pin 5, compressed air is supplied in this state, and the hammer 7 Pull out by using the impact force when it rises vigorously and stops.

[0005]

By the way, since the positioning pin is driven so that the positions of both parts are not displaced, the fitting force is strong, and a great force is required to pull it out.

For this reason, in the case of using a conventional manual tool to pull out, it is necessary to reciprocate with a heavy hammer with a great deal of force, and even if only one positioning pin is pulled out, much labor is required. I needed it.

Further, since the air tool uses the force of compressed air, the labor of the operator itself is not so necessary, but the work can be performed only in the place where the air pipe is provided, and the place of use There was a limit. Further, the air tool has a complicated structure and is difficult to provide at low cost.

Therefore, the present invention is intended to provide a positioning pin extracting tool which can be easily extracted with a little labor and has a simple structure.

[0009]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned conventional drawbacks, and the one according to claim 1 has a hollow portion penetrating from one end to the other end. A holder with a female screw portion formed on the inner peripheral surface and a male screw portion that is screwed into the female screw portion of the holder are formed on the outer peripheral surface, and has a hollow portion that penetrates from one end to the other end. In a state in which the rotating body integrally provided with a couple receiving portion at one end projecting to the outside in a screwed state, the thrust bearing arranged in the middle of the hollow portion of the rotating body, and the thrust bearing being idle The head has a head to be supported, and a shaft extending from the head and penetrating the inside of the hollow part of the holder from the inside of the hollow part of the rotary body and protruding to the outside from the other end of the holder. A rotating tool engagement part that can engage the rotating tool inserted from the hole opened in the center of the force receiving part. And a shaft member having a connecting portion with a positioning pin formed at the tip of the shaft portion protruding from the holder, and the center of the female screw portion of the holder and the center of the couple receiving portion of the rotating body, A pulling-out device for a positioning pin, characterized in that the center of the shaft member is aligned and the shaft member can be moved in the axial direction by the rotation of the rotating body.

According to a second aspect of the present invention, in addition to the structure of the first aspect, the holder is provided with a co-rotation stopper which receives a reaction force when the rotating body is rotated.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. A positioning pin pulling-out device 11 according to the present invention includes an outer holder 12, a rotating body 13 that is screwed into the holder 12 to rotate, a thrust bearing 14 provided in a hollow portion of the rotating body 13, and this thrust. The head portion 15 is supported by the bearing 14 so as to be idle,
A shaft portion 16 extending from the head portion 15 is formed of a shaft member 17 and the like, the tip of which protrudes from the holder 12 by passing through the rotating body 13 and the penetrating portion of the holder 12.

The holder 12 is a thick cylindrical member having a hollow portion extending from one end to the other end in the central axis direction,
At the tip end portion (the lower end portion in FIG. 1) facing the positioning pin 20, an abutting portion 21 is formed in which the outer diameter is gradually reduced and the tip end surface is flattened as compared with other portions.
The hollow portion of the holder 12 is a through hole having a circular cross section,
A female screw portion 22 is formed on the inner peripheral surface from the opening portion opened on the end surface on the opposite side to the contact portion 21 to the middle of the length, and the portion closer to the tip end than the female screw portion 22 is the extracted positioning pin. Two
The pin storage space 23 has an inner diameter and a length capable of storing 0. Although not shown in the drawings, the hollow portion between the portion where the female screw portion 22 is formed and the pin housing hollow portion 23 may be an intermediate hollow portion that is larger than the inner diameter of the female screw portion 22.

Further, on the outer peripheral surface of the holder 12, a bolt or a grip as a co-rotation stopper 25 is provided so as to project in a direction orthogonal to the axial direction. This co-rotation stopper 25
Is to prevent a worker from receiving a reaction force when the rotating body 13 is rapidly rotated, and to prevent the holder 12 from rotating together. What kind of structure and shape is possible if the holder 12 can be pressed so as not to rotate together? But it's okay.

Rotating body 1 screwed into the above-mentioned holder 12
Reference numeral 3 denotes a substantially cylindrical body having an outer peripheral surface formed with a male screw portion 30 that is screwed into the female screw portion 22, and has a hollow portion that penetrates from one end (the upper end in FIG. 1) to the other end (the lower end in FIG. 1). And holder 12
A hexagonal nut-shaped couple receiving portion 31 is integrally provided at one end projecting to the outside in a state of being screwed into the hollow portion. Then, a tool insertion hole 32 which is a part of the hollow portion is opened at the center of the couple receiving portion 31. Further, the thrust bearing 14 is provided in the middle of the hollow portion located at the back of the tool insertion hole 32 (downward in FIG. 1).

In the present embodiment, the thrust bearing 14
In order not to move the tool in the axial direction, the inner diameter of the upper part of the hollow portion communicating with the tool insertion hole 32 is set to be slightly larger than the diameter of the rotating tool (hexagon wrench in this embodiment). Also, the lower inner diameter is set to be large, the auxiliary cylinder 33 is inserted into the large diameter portion from below, and the thrust bearing 14 is loaded in the space between the auxiliary cylinder 33 and the upper end surface of the large diameter portion. The lower end of the cylindrical member 33 is stopped by a stopper 34 such as a C ring. It should be noted that the thrust bearing 14 is supported by the upper end of the auxiliary tubular member 33, and is supported by the head portion 15 of the shaft member 17.
Load with the upper ring free to rotate.

Further, the auxiliary cylindrical member 3 is provided in the large diameter portion of the rotating body 13.
The means for stopping 3 is not limited to the stopper 34, and for example, the female screw formed in the large diameter portion and the auxiliary cylinder 3
A male screw formed on the outer periphery of 3 may be screwed or fixed by welding. Further, the mounting structure of the thrust bearing 14 is not limited to the one using the auxiliary cylindrical member 33, and for example, the thrust bearing 14 is supported by the step portion formed on the inner peripheral surface of the hollow portion. May be.

The thrust bearing 14 may have any structure as long as it can receive a thrust load in the axial direction, for example, a general thrust ball bearing.

The shaft member 17 has a head 15 having a diameter larger than that of the shaft hole of the thrust bearing 14 and supported by the thrust bearing 14 so as to be idle, and a shaft portion 16 extending downward from the head 15. Is a long bolt-shaped member having a hexagonal cross section formed as a rotary tool engaging portion 40 on the upper end surface of the head portion 15, and the positioning pin 2 is provided at the tip of the shaft portion 16.
A male screw 41 is formed as a connecting portion with 0. In addition,
The length of the shaft portion 16 is such that when the rotating body 13 is rotated in one direction and screwed into the holder 12 sufficiently deeply, the shaft member 17 moves together with the rotating body 13 and the male screw 41 formed at the tip of the shaft portion 16 is Protruding from the opening of the contact portion 21 of the holder 12,
When the rotating body 13 is sufficiently rotated to the other side, the length of the tip of the male screw 41 of the shaft portion 16 is set so as to be retractable into the pin accommodating space portion 23.

Next, the operation of pulling out the positioning pin 20 using the above-mentioned positioning pin pulling-out device 11 will be described. As shown in FIG. 1, the positioning pin 20 is driven into a positioning hole 52 that is a series of holes formed in a portion where the two parts 50 and 51 are overlapped, so that both parts 5
The positions of 0 and 51 are regulated. This positioning pin 20
When pulling out, first, as a preparatory step, the rotating body 1
3 is sufficiently screwed into the holder 12 so that the tip of the shaft portion 16 is projected from the opening of the contact portion 21 of the holder 12.

Then, the abutting portion 21 of the holder 12 is directed toward the positioning pin 20, and the tip of the shaft portion 16 is positioned at the positioning pin 2
0 female screw hole 53, and in this state, an L-shaped hexagon wrench (rotating tool) 54 is inserted from the tool insertion hole 32 opened in the couple receiving portion 31, and the tip of this wrench 54 is inserted into the shaft member 17
Engages with the rotary tool engaging portion 40 formed on the head 15 of the
By operating the wrench 54 in this state, the shaft member 17
Is rotated to screw the male screw 41 at the tip of the shaft portion 16 into the female screw hole 53 of the positioning pin 20 to connect them. Shaft 1
When the tip of 6 is connected to the positioning pin 20, the wrench 54 is removed.

The tip of the shaft portion 16 is attached to the positioning pin 20.
It is desirable that the contact portion 21 of the pulling-out device 11 is brought into contact with the surface of the component 50 by appropriately rotating the rotating body 13 after the connection.

Also, depending on the choice of workability,
After the contact portion 21 is brought into contact with the surface of the component 50, the rotating body 13
Alternatively, the tip of the shaft portion 16 may be connected to the positioning pin 20 by rotating the wrench and operating the wrench 54. In any case, the contact portion 21 is in contact with the surface of the component 50.

Then, as shown in FIG. 2, the box wrench 61 mounted on the impact wrench 60 is engaged with the couple receiving portion 31. Since the couple receiving portion 31 in this embodiment is formed in a hexagonal nut shape, a box wrench 61 suitable for this couple receiving portion 31 is attached to the output shaft 62 of the impact wrench 60 in advance. Box wrench 61
Box retainer pin 63 so that it does not come off during work.
It is desirable to attach the pin retaining cover 64.

And, the co-rotating stopper 2 of the holder 12
Rotate the rotating body 13 to one side (if the screw formed on the hollow part of the holder 12 and the outer peripheral surface of the rotating body 13 is a right-handed screw, rotate it leftward) with the impact wrench 60 while holding 5 by hand so as not to rotate together. To do. When the rotating body 13 is rotated in one direction, the screwing length of the rotating body 13 with respect to the holder 12 is reduced, and the rotating body 13 rises (moves in the direction away from the positioning pin 20) according to the rotation angle, and this rise ( Move)
The rotating force of the rotating body 13 is not transmitted to the head portion 15 due to the rotational force non-transmitting action of the thrust bearing 14.

Therefore, the head portion 15 rises together with the rotating body 13 without rotating even if the rotating body 13 rises while rotating. Then, when the head portion 15 moves up, the shaft portion 1
Since 6 tends to rise together, the pulling force acts on the positioning pin 20 connected to the tip of the shaft portion 16.

As described above, when the rotating body 13 is sufficiently rotated by the impacting strong couple of the impact wrench 60, the strong rotating force is generated by the female screw portion 22 of the holder 12 and the rotating body 1.
3 is converted into a pulling force in a linear direction (vertical direction in the drawing) by being screwed with the male screw portion 30, and the pulling force is transmitted by the thrust bearing 14 without transmitting the rotational force to the shaft member 17. . Further, when the rotary motion is converted into the linear motion by the screw portions 22 and 30, a strong force can be obtained according to the screw pitch, similarly to the principle of the screw type jack. Therefore, even if the pulling-out resistance force of the positioning pin 20 is large, the rotary body 13 is not affected by the impact wrench 60.
It can be pulled out easily by rotating with a couple of.

Then, as shown in FIG. 2, the positioning pin 20 pulled out from the positioning hole 52 is housed in the pin housing space 23 of the holder 12 as the tip of the connected shaft portion 16 rises.

After the positioning pin 20 is pulled out, the impact wrench 60 is removed, and as shown in FIG. 3, the rotary body 13 is rotated in the other direction (rightward in this embodiment) to pin the tip of the shaft portion 16. It is projected from the storage empty portion 23. Then, when the hexagon wrench 54 is inserted and the positioning pin 20 is rotated while the rotation of the shaft member 17 is stopped, the positioning pin 20 can be removed from the shaft portion 16.

The impact wrench 60 is the rotating body 1.
If the couple receiving portion 31 of 3 can be rotated with a strong force,
It may be an air tool that operates with compressed air, or it may be a manual type that is hammered. Also, the rotating body 1
If the couple receiving portion 31 of 3 can be rotated with a strong force,
A tool other than the impact wrench 60 may be used, for example, a wrench with a long handle may be used. However, the impact wrench 60
It is desirable to use

Although the couple receiving portion 31 is formed in the shape of a hexagonal nut in the above embodiment, it may have any shape as long as it can receive the couple, for example, a quadrangle. Further, the rotary tool engaging portion 40 formed on the head portion 15 of the shaft member 17 is not limited to the hexagonal recessed portion, and may have any shape with which the rotary tool is engaged, for example, a Phillips screwdriver. May be a cross groove that can be engaged.

[0031]

As described above, according to the present invention, the rotary motion can be converted into a strong linear motion by the screwing of the holder and the rotary body, and the thrust bearing does not transmit the rotary force but the pull-out force. Only to the shaft member,
The strong pulling force allows the positioning pin to be pulled out. Therefore, even a strongly driven positioning pin can be easily pulled out.

Further, when rotating the rotating body, it is possible to use an ordinary impact wrench which is generally popular. Further, if a manual impact wrench is used, it can be used even in a place where there is no air line, so that there is no limit to the place of use. Further, when the compressed air type impact wrench is used, it is not necessary to operate it with a strong force, so that it can be pulled out more easily.

Furthermore, since the present invention has a simple structure,
It is easy to manufacture and can be provided at low cost.

According to the second aspect of the present invention, even if a shocking couple is applied to the rotating body, the co-rotation of the holder can be pressed by the co-rotation stopper, so that the work can be performed more easily.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a positioning pin drawing device in a state where a shaft member is rotated by a hexagon wrench and connected to a positioning pin.

FIG. 2 is a cross-sectional view of the positioning pin extracting device in a state in which a rotary body is rotated by an impact wrench to extract a positioning pin.

FIG. 3 is a front view of the positioning pin extracting device showing a state in which the rotation of the shaft member is stopped by a hexagon wrench and the positioning pin is removed from the shaft member.

FIG. 4 is a cross-sectional view of a conventional manual positioning pin drawing device.

FIG. 5 is a diagram showing a schematic configuration of a conventional positioning pin pulling device that pulls out using compressed air.

[Explanation of symbols]

 11 Positioning Pin Extraction Device According to the Present Invention 12 Holder 13 Rotating Body 14 Thrust Bearing 15 Head of Shaft Member 16 Shaft Part of Shaft Member 17 Shaft Member 20 Positioning Pin 21 Abutment Part 22 Female Screw Part 23 Pin Storage Space 25 Rotation stopper 30 Male screw portion 31 Couple force receiving portion 32 Tool insertion hole 33 Auxiliary cylinder material 34 Stopper metal fitting 40 Rotating tool engaging portion 41 Male screw 50, 51 Parts positioned by a positioning pin 52 Positioning hole 53 Female screw hole 54 times Hexagonal wrench as moving tool 60 Impact wrench 61 Box wrench 62 Output shaft 63 Box retaining pin 64 Pin retaining cover

Claims (2)

[Claims] 1. A hollow portion penetrating from one end to the other end,
A holder with a female screw portion formed on the inner peripheral surface of the hollow portion, and a male screw portion that engages with the female screw portion of the holder are formed on the outer peripheral surface, and has a hollow portion that penetrates from one end to the other end of the holder. A rotating body with a couple receiving part integrally provided on one end protruding outside in the state of being screwed into the hollow part, a thrust bearing arranged in the middle of the hollow part of the rotating body, and a thrust bearing enabling idling A head portion supported in such a state, and a shaft portion that extends from the head portion, penetrates the hollow portion of the holder from the hollow portion of the rotating body, and protrudes to the outside from the other end of the holder. Is a rotary tool engaging portion capable of engaging a rotary tool inserted from a hole opened in the center of the couple receiving portion, and the tip of the shaft portion protruding from the holder is
A pulling device for a positioning pin, comprising: a shaft member having a connection portion with the positioning pin; and a rotation member that allows the rotation member to move in the axial direction without rotating the shaft member. 2. The positioning pin withdrawing device according to claim 1, wherein the holder is provided with a co-rotation stopper that receives a reaction force when the rotating body is rotated.