JP2797966B2 - O-ring insertion device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an O-ring suitable for inserting an O-ring into a fluid pipe joint such as a refrigerant pipe of a refrigeration cycle.
The present invention relates to a ring insertion device, in which an O-ring can be inserted using a hand tool which can be easily operated manually.

[0002]

2. Description of the Related Art Conventionally, as a method for manually inserting an O-ring into a fluid pipe joint, a method as shown in FIGS. 30 to 32 has been used. That is, FIG. 30 shows a fluid pipe 100, and a joint portion 101 of the pipe 100.
31 is formed with a concave groove 102 for mounting an O-ring 200 shown in FIG. 31, and the O-ring 200 is inserted using a hand tool 300 shown in FIG. This hand tool 3
00 is a small-diameter cylindrical portion 301 smaller than the outer diameter of the pipe 100.
And a tapered cylindrical portion 302 that gradually increases the outer diameter, a large-diameter cylindrical portion 303 having an outer diameter equivalent to that of the pipe 100, and a guide section 304 that can be inserted into the inner peripheral side of the pipe 100. I have.

[0003] When inserting the O-ring 200, first, the O-ring 200 coated with lubricating oil is held in a hand tool 3
00 and attached to the small-diameter cylindrical portion 301
Insert the guide part 304 at the tip of
The end surface of the large-diameter cylindrical portion 303 is brought into contact with the end surface of the pipe 100. Next, push the O-ring 200 in the direction of arrow A by hand,
The O-ring 200 is inserted into the concave groove 102 of the pipe 100 via the tapered cylindrical portion 302 and the large-diameter cylindrical portion 303.

[0004]

However, in the above-described method, since the O-rings 200 are inserted one by one by hand, it takes time to insert the O-rings 200, and when the O-ring 200 is pushed in, a load is applied to the fingertips of the hand. If the insertion operation is performed continuously for a long time, the fingertips of the worker may be roughened, deformed, tendonitis, and the like.

In Japanese Patent Application Laid-Open No. 4-105827, an O-ring is automatically inserted by an automatic machine. However, an automatic operation of an insertion claw for inserting an O-ring is proposed. The mechanism becomes complicated and the cost increases. Also, since the insertion claw is automatically operated by the automatic operation mechanism,
Since the operation claw operating range is largely limited, the degree of freedom with respect to the shape and physique (for example, the degree of bending of the fluid pipe, the outer diameter, etc.) of the O-ring insertion target decreases, and there is a problem in that applicable products are reduced.

[0006] The present invention has been made in view of the above points,
Using a simple and inexpensive hand tool, the O-ring can be efficiently inserted into the insertion target (fluid pipe, etc.) without directly touching the O-ring with hand, and it can be used well for a wide range of insertion targets. It is an object of the present invention to provide an O-ring insertion device of a manual operation type that can be applied.

[0007]

In order to achieve the above object, the present invention employs the following technical means. That is, according to the first aspect of the present invention, there is provided a shaft for holding a large number of O-rings on the outer periphery in an axial direction, and a positioning portion formed on the distal end side of the shaft for positioning the O-ring at the most distal end. The O-ring is pressed toward the tip of the shaft so as to always maintain the foremost O-ring position on the outer periphery of the shaft at a predetermined position determined by the positioning portion.
Ring pressing means, a holder for detachably holding the shaft at a predetermined position, a slider held on the outer periphery of the holder so as to be slidable in a predetermined range in the axial direction, and a radial direction of the shaft attached to the slider. And a pair of claw members having a claw piece protruding toward an O-ring on the outer periphery of the shaft. When the pair of claw members are closed at a position most retracted from the distal end side of the shaft together with the slider, only the foremost O-ring is separated by the claw pieces and moved to the distal end side of the shaft, and the object to be inserted is inserted. The technical means that it is configured so that it can be inserted into the device is adopted.

According to the second aspect of the present invention, a shaft for holding a number of O-rings on the outer periphery in a line in the axial direction, and a positioning portion formed on the distal end side of the shaft for positioning the O-ring at the most distal end. O-ring pressing means for pressing the O-ring toward the tip end of the shaft so as to always maintain the foremost O-ring position on the outer periphery of the shaft at a predetermined position determined by the positioning portion; A holder that holds the holder in a position, a fixing member that fits on the outer periphery of the holder, and holds the holder so as to be slidable in a predetermined range in the axial direction, and holds the holder so that the shaft can be opened and closed in the radial direction of the shaft. And a pair of claw members having claw pieces protruding toward an O-ring on the outer periphery of the shaft, wherein the pair of claw members are most retracted from the distal end side of the shaft. When the pair of claw members are closed at the set position, only the leading-edge O-ring is separated by the claw pieces and moved toward the distal end of the shaft, so that it can be inserted into an insertion target. Adopt technical means.

According to a third aspect of the present invention, there is provided the O-ring insertion device according to the second aspect, further comprising a claw driving means using a fluid pressure for opening and closing the pair of claw members. . According to the invention described in claim 4, in the O-ring insertion device according to any one of claims 1 to 3,
A return means is provided for returning the slider in a direction of retreating from the distal end side of the shaft.

According to a fifth aspect of the present invention, in the O-ring inserting device according to any one of the first to fourth aspects,
The O-ring pressing means is a fluid pressure responsive member that presses the O-ring by receiving a fluid pressure that can be introduced into the holder from outside. According to a sixth aspect of the present invention, there is provided a method of manufacturing a semiconductor device according to any one of the first to fourth aspects.
In the ring insertion device, the O-ring pressing means is a spring that presses the O-ring by a spring force.

According to a seventh aspect of the present invention, in the O-ring insertion device according to any one of the first to fourth aspects,
The O-ring pressing means comprises a weight member slidably fitted on the outer periphery of the shaft, and is configured to press the O-ring by its own weight. According to an eighth aspect of the present invention, in the O-ring insertion device according to any one of the first to seventh aspects,
A guide portion for guiding the movement of the O-ring is formed on the shaft toward the distal end side from the positioning portion.

According to a ninth aspect of the present invention, in the O-ring inserting apparatus according to any one of the first to eighth aspects,
The guide portion is formed with a two-plane width portion for guiding the pair of claw pieces in an axial direction of a shaft.

[0013]

According to the first and fourth to ninth aspects of the present invention, since the above-mentioned technical means are provided, the pair of claw members are manually closed, and the most advanced O-ring on the shaft is provided. Can be separated and inserted into the object to be inserted, so that it is not necessary to insert O-rings one by one by hand as in the conventional device, so that the O-ring insertion operation can be performed quickly and efficiently. The effect is great.

Further, when the O-ring is pushed in as in the conventional device, no particular load is applied to the fingertip of the hand, and even if the insertion operation is performed continuously for a long time, the operator's fingertip becomes rough, deformed, and tendonitis. And so on. Further, as compared with a device that automatically inserts an O-ring by an automatic machine as disclosed in Japanese Patent Application Laid-Open No. 4-105827, an automatic operation mechanism for an O-ring insertion claw is not required, and the configuration of the entire device becomes extremely simple. In addition, the manufacturing cost can be reduced. Further, in the device of the above publication, the degree of freedom with respect to the shape and physique (for example, the degree of bending of the fluid pipe, the outer diameter, etc.) of the O-ring insertion object is reduced by employing the automatic operation mechanism of the insertion claw. Since the device is configured as a manually operable hand tool, the direction of the shaft (the insertion direction of the O-ring) can be relatively freely selected according to the shape and physique of the O-ring insertion target, and the applicable product can be selected. This has the effect of increasing the degree of freedom.

According to the second and third aspects of the present invention, since the entire device of the present invention can be fixedly supported at an appropriate place in a factory by the fixing member, the operator does not need to hold the device of the present invention by hand, and the object to be inserted can be inserted. This has the effect of reducing the work load on the worker. According to the third aspect of the present invention, since the pair of claw members are opened and closed by claw driving means using fluid pressure, there is no need to manually open and close the claw members, thereby reducing the work load on the operator. It can be further reduced.

According to the fifth and sixth aspects of the present invention, the O-ring can be maintained on the shaft by the fluid pressure responsive member or the spring. Even if it is selected, the stacked state of the O-rings can be maintained, and the workability of the O-ring insertion operation can be improved. Moreover, in the invention according to claim 6, since the O-ring is pressed by the fluid pressure responsive member using air pressure or the like, the O-ring can always be pressed with a constant pressure even if the number of O-rings on the shaft changes. As a result, problems such as overlapping of O-rings due to excessive pressing force do not occur, and the most advanced O-ring
There is an effect that the ring can always be surely separated.

In the invention according to claim 7, the O-ring is pressed by the weight of the weight member when the device of the present invention is used as a device dedicated to downward movement. There is no need to use it, and the configuration can be simplified. According to the eighth aspect of the present invention, the O-ring can be smoothly moved toward the insertion target by the guide portion at the tip of the shaft.

According to the ninth aspect of the present invention, even if a stepped portion is generated by the positioning portion, the claw piece can be smoothly moved by the two-face width portion provided in the guide portion, and the claw piece can be manually operated by the operator. O-ring insertion work becomes easy.

[0019]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. (First Embodiment) FIGS. 1 to 11 show an O-ring insertion device according to a first embodiment, and FIG. FIG.
Reference numeral 3 denotes a fluid pipe (specifically, a refrigerant pipe of a refrigeration cycle for an automobile air conditioner) 55 to which the O-ring 28 is to be inserted.

The apparatus S of this embodiment is configured as a manually operable hand tool having a total length of about 24 cm, and 1 has a number of O-rings 28 arranged in the axial direction and held on the outer periphery. The shaft is made of metal such as iron. Reference numeral 2 denotes a cylindrical holder (holding member) made of metal such as iron. The shaft 1 is inserted into the inner peripheral side, and holds the shaft 1 at a predetermined position in the axial direction so as to be detachable. Reference numeral 3 denotes a pair of lever members which can be opened and closed by being held by one hand of an operator, and 4 denotes a cylindrical slider (sliding member) held on the outer periphery of the holder 2 so as to be movable in the axial direction. It is. The levers 3a and 3b of the pair of lever members 3 are attached to the slider 4 by pins 8a and 8b.
It is held so that it can be opened and closed in the radial direction of the holder 2. Here, the lever member 3 is formed of aluminum for weight reduction, but the slider 4 is formed of metal such as iron from the viewpoint of abrasion resistance and the like.

The pair of lever pieces 3a and 3b are arranged at 180-degree symmetrical positions, and claw pieces 5a and 5b projecting toward the O-ring 28 are respectively provided at the tip ends thereof with bolts 16a.
a, 16b, 16c, and 16d. The nail pieces 5a and 5b are formed of a metal such as iron having excellent wear resistance. The slider 4 is normally pressed against a nut (retraction positioning stopper member) 11 by a spring 15 on the outer periphery of the holder 2. At this position, the operator grips the lever member 3 with one hand, and the claw pieces 5 a,
The position of the lever member 3 is set so that only one O-ring 28 at the forefront is separated by 5b.

The nut 11 is mounted by being screwed into a threaded portion on the outer peripheral portion of the holder 2. However, if the nut 11 moves, the slider 4 cannot always return to the same position without fail. Since only one piece cannot be separated, a nut 12 is attached as a detent for the nut 11, whereby the nut 11 is always fixed at a fixed position on the holder 2.

Numeral 13 denotes a nut serving as a stopper member for positioning the slider 4 forward. The nut 13 is screwed and attached to a threaded portion on the outer peripheral portion of the holder 2.
The nut 13 is prevented from rotating. A spring 15 for pressing the slider 4 to the retreat position side (the nut 11 side) is interposed between the nut 13 and the slider 4.
This constitutes return means for returning the slider 4 to the retreat position.

When the slider 4 is advanced to the distal end side of the shaft 1, the distal end portions 49 of the claw pieces 5 a and 5 b come off the outer peripheral distal end of the guide portion 40 of the shaft 1 and damage the pipe 55 or the O-ring 28. After adjusting the fixing position of the nut 13, the nut 14 is tightened and fixed so that the nut cannot be inserted. On the other hand, the lever piece 3 of the lever member 3
a and 3b are lock nuts (bonds) on the slider 4 when attached to the slider 4 by the pins 8a and 8b.
The bolts 10a and 10b fixed at the positions are adjusted to open at an angle that is easy to hold in the hands of the worker. Springs 9a and 9b are mounted between the slider 4 and the lever pieces 3a and 3b to hold the lever pieces 3a and 3b of the lever member 3 in an open state. To prevent the springs 9a and 9b from jumping out, the spring 9
8a and 9b are arranged around the bolts 10a and 10b so that the bolts 10a and 10b also serve as guides, and a circular concave portion (spotted portion) 45 is formed around the bolts 10a and 10b of the slider 4 (FIG. 8). Reference).

In FIG. 8, protrusions 4a and 4b are formed on the slider 4 at two upper and lower portions, and the protrusions 4a and 4b are formed.
Holes 4c and 4d through which the pins 8a and 8b pass are formed. Also, a hole 4e through which pins 7a and 7b described later pass.
Are opened at two places on the cylindrical surface of the slider 4. The upper surfaces 46 of the lever pieces 3a and 3b are knurled to prevent slipping of the operator's hand. When the lever pieces 3a, 3b are closed, the counterbore portions 47a, 47b of the upper surface 46 are connected to the head of the bolt 10 and the lever pieces 3a, 3b.
In order to prevent a finger or the like of an operator from being caught in the gap between the above and the above, the structure is provided so that the above-mentioned gap does not occur.

The pair of claw pieces 5a, 5b are fixed to the lever pieces 3a, 3b so as to be symmetrical and at the same position in the axial direction of the shaft 1. A pair of upper and lower claws 5a,
If the position of 5b is shifted, the state of the art O-ring 28
Since it becomes difficult to separate them one by one, it is necessary to finish the dimensions from the insertion holes 48 of the pins 8a, 8b of the lever pieces 3a, 3b shown in FIG.

The nail pieces 5a and 5b are bent as shown in FIG. 10 and are made of a cut material.
In order to prevent the ring 28 from being damaged, it is processed into a smooth curved surface shape, and as a specific material of the claw pieces 5a, 5b, quenching and plating are performed to prevent the tip portion 49 from being worn. Steel. Also, the nail pieces 5a, 5
The flange portion 50 formed at b is used as a finger stopper when the lever member 3 is pushed toward the tip end of the shaft 1.

Next, the specific structure of the shaft 1 will be described in detail with reference to FIGS. 5 and 6. The pin 34 provided at the forefront of the shaft 1 is provided with a fluid pipe 55 (an object to which the O-ring 28 is inserted). 13) is used as a guide for the inner diameter of the pipe 55 when the pipe 55 is inserted into the shaft 1. The tip of the pin 34 is formed thinner to make the insertion of the pipe 55 easier.

Here, the pipe 55 is shown in FIG.
(B) and (c) can be used. (A) and (b) are examples having a concave groove 58 for inserting an O-ring. In this example, an annular bulging portion 58 'for inserting and positioning an O-ring is provided.
A guide portion 40 is formed on the distal end side of the shaft 1 so as to guide the O-ring 28 during the O-ring insertion operation. The guide portion 40 includes a tapered portion 40a whose diameter gradually increases, and a cylindrical portion 40b having a constant diameter connected to the maximum diameter portion of the tapered portion 40a. A ring is provided between the cylindrical portion 40b and the pin 34. A groove 35 is formed.

The shape and size of the groove 35 are changed in accordance with the shape of the tip of the fluid pipe 55 (shape and size of an object to be inserted with an O-ring, see FIG. 13). The diameter of the groove 35 at the end (the inner diameter of the cylindrical portion 40b) 36 is slightly larger than the outer diameter 57 of the pipe opening, and the pipe 55 is securely inserted into the groove 35.
Insert and guide the tip. Further, since the groove depth 37 is adjusted to the tip size 56 of the pipe 55,
The O-ring 28 can be reliably inserted into the annular groove 58 at a predetermined position of the pipe 55.

At the base of the guide portion 40 of the shaft 1, there is provided a stepped portion 38 formed at a larger inclination angle than the tapered portion 40a. Thereby, the shaft 1
Of the O-rings 28 stacked on the outer periphery of
The rings 28 can be reliably positioned and stopped at the same position, and the leading-edge O-rings 28 can be reliably separated one by one.

The diameter 39 of the maximum diameter portion of the stepped portion 38
(See FIG. 5 (a).) The center diameter 54 of the O-ring 28 (see FIG.
2)). This stepped part 3
If only the tapered portion 40a is provided without providing the O-ring 2,
The position of the O-ring 28 fluctuates back and forth due to variations in the accuracy of the inner diameter dimension 53 of 8 and the elongation of the O-ring 28, and variations in the dimensions of the shaft 1 itself when the shaft 1 is replaced. It becomes impossible to reliably separate the O-ring 28 repeatedly.

In order to solve this problem, a tapered portion 40a is formed at the root of the guide portion 40 of the shaft 1.
There is provided a stepped portion 38 formed at a larger inclination angle. Therefore, in this example, the stepped portion 38 constitutes a positioning portion for positioning the foremost O-ring 38. Also, in the guide portion 40 at the distal end of the shaft 1, on the surface through which the distal ends of the claw pieces 5 a, 5 b pass, the claw pieces 5 a, 5 b can smoothly move without climbing on the stepped portion 38. A two-sided width portion 41 is provided. The two-sided width portion 41 is made up of two flat portions having a gentle inclination provided at two positions at 180-degree symmetrical positions.
R processing (smooth curved surface processing) is performed in order to prevent damage to the surface 8.

The width 41 is not always necessary, and the O-ring 28 can be inserted without the width 41. However, if the width 41 is abolished, the leading edge O In order to separate the ring 28, the worker once applies a force to the pair of lever pieces 3a, 3b, and then, unless the force on the lever pieces 3a, 3b is once loosened, the tips of the claw pieces 5a, 5b become stepped. It gets caught on the attachment portion 38 and stops. Therefore, when the width across flat portion 41 is abolished, the lever piece 3
It is necessary to finely adjust the operating force to a and 3b, and skill is required for the O-ring insertion work. In addition, long-time work is not suitable for fatigue.

On the other hand, by providing the two-face width portion 41, anyone can easily and continuously insert the O-ring for a long time. On the other hand, the width across flats 4
Due to the provision of 1, it is necessary to maintain the relative position between this and the claw pieces 5a, 5b. First, holder 2
A radially oriented pin 17 (see FIG. 4a) is attached to the inner periphery of the shaft 1 and a groove 32 provided at the rear end of the shaft 1 is fitted into the pin 17 to prevent the shaft 1 from rotating. . The claw pieces 5a and 5b are the lever pieces 3.
a, 3b attached to the slider 4. Therefore, the slider 4 is mounted on the holder 4 by inserting pins 7a and 7b attached to the holes 4e on the side surfaces thereof into two grooves 42 (see FIG. 7) dug in the axial direction on the outer periphery of the holder 2. 2 is prevented from rotating. Thus, the relative positional relationship between the two-face width portion 41 of the shaft 1 and the claw pieces 5a and 5b is kept constant. After the pins 17 are driven into the holder 2, both ends are sealed with an adhesive such as a bond in order to prevent air leakage described later.

The shaft 1 is made of quenched steel because the nail pieces 5a and 5b and a steel ball 19 to be described later hit, and the surface thereof is plated with chrome or the like to guide the O-ring 28. The surface is smoothed to make the O-ring 28 move smoothly. At the center of the shaft 1, two shallow grooves 30a and 30b (shallow enough that the O-ring 28 is not caught) are machined at predetermined intervals in the axial direction as shown in FIG. . These grooves 30a, 30
b is a measure of the number of O-rings 28 to be loaded on the shaft 1 and is defined by the grooves 30a and 30b.
The purpose is to prevent the O-ring 28 from being out of stock or double inserted by matching the number of rings mounted to the number of products to be inserted.

The rear end of the shaft 1 is provided with a hole 33 dug in the axial direction and opened to the outside, and the nut 20 is provided with an O-ring 2 on the outer periphery of the rear end of the holder 2.
5 is screwed and fixed in an airtight manner. This nut 20 holds a cylindrical stopper 22 for determining the rear end position of the shaft 1 on the inner peripheral side of the holder 2, and a pipe joint 26 for receiving air supply from outside is attached to the nut 20. The pipe joint 26 is connected to an air supply pipe 27.

The air supplied from the pipe 27 through the joint 26 is supplied to the air chamber 29 in the holder 2 through the hole 33. The piston 6 is axially slidably fitted to the inner peripheral surface of the holder 2 adjacent to the air chamber 29, and the air pressure in the air chamber 29 presses the piston 6 toward the O-ring 28. Due to the pressing force of the piston 6, the leading O-ring 28 is always located at a fixed position determined by the stepped portion 38. A nut 23 is screwed into the foremost part of the holder 2 to prevent the piston 6 from jumping out of the holder and dropping.

As understood from the above description, in the present embodiment, the piston 6, the air chamber 29, and the like constitute a fluid pressure responsive member that presses the O-ring 28 toward the distal end of the shaft 1. O-ring pressing means is constituted by the fluid pressure responsive member. Further, as described above, by adopting a fluid pressure responsive member such as an air pressure as the O-ring pressing means, the O-rings 28 laminated with a constant force regardless of the amount of the O-rings 28 loaded on the shaft 1 at all times.
Can be pressed against the stepped portion 38 of the shaft 1. As a result, only the leading O-ring 28 can be reliably separated one by one by the claw pieces 5a and 5b.

Next, a mechanism for attaching and detaching the shaft 1 and the holder 2 will be described. The small diameter part 2 is located on the rear side of the holder 2.
a (see FIG. 7), and a cylindrical collar member 18 is slidably fitted on the outer periphery of the small diameter portion 2a (see FIG. 4a).
O-rings 24a, 24b are arranged on the inner peripheral portions of both ends in the axial direction of the collar member 18. The two O-rings 24a, 24b allow three spheres 19, 19 made of steel to be formed. The airtightness of the inner peripheral surface of the central portion of the collar member 18 to be kept in contact is maintained to prevent air leakage.

A spring 21 is interposed between the collar member 18 and the nut 20, and the spring 21 constantly presses the collar member 18 in the shaft forward direction. When the shaft 1 is mounted on the holder 2, the collar member 18 is moved rearward (FIG. 4A).
When the shaft 1 is inserted into the holder 2 until the shaft 22 hits the stopper 22 while the collar member 18 is pulled to the right side, and then the collar member 18 is released, the collar member 18 is pushed forward by the spring 21, and three portions provided at the rear of the holder 2 are provided. The three spheres 19 guided and fitted into the holes 43 (see FIGS. 4B and 7C) of the collar member 18 have the small-diameter inner surface 51.
11 (see FIG. 11), the ball 19 and the groove 31 are pressed against the groove 31 dug in the circumferential direction of the outer peripheral surface of the rear portion of the shaft 1.
The shaft 1 is fixed to the holder 2 by fitting.

When the collar member 18 is pulled backward, the ball 19 is displaced outward along the large-diameter inner surface 52 of the collar member 18 and the fitted state of the ball 19 and the groove 31 is released. 2 can be removed.
The collar 18a on the outer periphery of the collar member 18 is provided to support one end of the spring 21 and to be used as a handle when the collar member 18 is pulled down to remove the shaft 1.

Next, a description will be given of a method of inserting an O-ring in the first embodiment with the above configuration. Prior to insertion of the O-ring 28 into the fluid pipe 55, the O-ring 28 is axially aligned and laminated in a cylindrical case holder 68 shown in FIG.
The case holder 68 becomes full of O-rings,
When the ring aligner stops, remove the case holder 68
Remove from the ring alignment device.

Next, the rear end side of the shaft 1 from the opening above the case holder 68 is inserted as shown in FIG.
Next, the O-rings 28 aligned in the case holder 68 are turned over by turning the entire shaft 1 and the case holder 68 as shown in FIG.
Transfer to By applying oil to the O-ring 28 in this state, the operator does not need to directly touch the oil. In this state, the shaft 1 is kept upright.

Next, the front part of the holder 2 of the O-ring insertion device is held with one hand, and the collar member 18 is attached to the nut 2 with the other hand.
The three steel balls 1 fitted in the holes 43 provided in the holder 2 by pulling in the direction
9 comes off in the outer peripheral direction of the holder 2 as shown in FIG. Next, while holding the collar member 18 by hand,
The shaft 1 with the O-ring 28 attached as described above is inserted into the holder 2 from its rear end until it hits the stopper 22 (see FIG. 17).

Next, when the collar member 18 is released, the collar member 18 is pushed out in the direction of arrow B (FIG. 17) by the spring 21, and the three steel balls 19 are fitted into the grooves 31 of the shaft 1, and By pressing down, the shaft 1 is fixed to the holder 2 as shown in FIG. next,
When air is supplied from the pipe 27 (air may be supplied in advance), the supplied air enters the air chamber 29 through the hole 33 of the shaft 1 through the pipe joint 26,
By applying a constant pressure to the piston 6, the laminated O-ring 28 is constantly pressed against the stepped portion 38 of the shaft 1.

By adopting the piston 6 pressing method by air pressure, the O-ring 28 can always be pressed with a constant weak force regardless of the number of the O-rings 28, so that the shaft 1 can be oriented in any direction. Thus, the stacked O-rings 28 can be securely held on the outer periphery of the shaft 1. Therefore, the operator can hold the O-ring insertion device in his / her hand and perform insertion work in any posture, and can easily cope with various types of fluid pipes 55 as shown in FIG.

At the same time, by adopting the air pressure method, the overlapping of the O-rings 28 can be prevented, and the O-rings can be reliably separated one by one with relatively small force. next,
By holding the insertion device with one hand and closing the pair of lever members 3 as shown by arrow C in FIG. 19, the claw pieces 5a and 5b are stacked on the shaft 1 and the leading-edge O-ring 28 and the next O-ring 28 And separates only one leading O-ring 28.

In this state, the pipe 55 is
As shown in FIG. 20, the tip of the shaft 1 (34, 4
After the pipe 55 is securely inserted into the pipe 0), the lever member 3 is advanced and the above-mentioned separated O-ring 28 is pushed out toward the pipe 55 by the claw pieces 5a and 5b. At this time, the claw pieces 5a and 5b slide smoothly (see FIG. 21) while gradually opening along the two-face width portion 41 of the shaft 1 and reach the guide portion 40.

Next, the separated O-ring 28 moves on the guide portion 40 at the tips of the claw pieces 5a and 5b, and the O-ring 28 is once expanded by the guide portion 40 from the outer diameter of the pipe 55, When the pieces 5a and 5b pass through the section of the guide portion 40, the O-ring 28 is released from the shaft 1 and returns to its original size by its own elastic force, so that the O-ring 28 is inserted into the concave groove 58 at a predetermined position of the pipe 55. The ring 28 is fitted (see FIG. 22), and the operation of inserting the O-ring 28 is completed.

Next, when the force applied to the lever member 3 is loosened while removing the pipe 55 from the shaft 1, the slider 4 (and the lever member 3 and the claw 5
a and 5b together) return to the original retracted position (the position corresponding to the nut 11). By repeating the above operation until the O-ring 28 on the shaft 1 disappears, the O-ring 28 can be efficiently and rapidly inserted into a predetermined position (the concave groove 58) of the fluid pipe 55 in a simple manual operation.

As described above, by matching the number of the O-rings 28 to be laminated by the grooves 30a and 30b provided in the shaft 1 with the number of the pipes 55 to be inserted in advance, the number of the missing O-rings 28 can be reduced. Double insertion can be confirmed. As is apparent from the above description, the apparatus according to the present embodiment can perform the work without directly touching the O-ring 28 and the applied oil, so that the fingertip of the operator can be prevented from being deformed, deformed, and tendonitis. In addition, the device as a whole is lightweight and compact, and is a simple hand tool that can be handled with one hand.
Since the ring 28 can be maintained in a well laminated state in any direction by air pressure, the handling direction at the time of the operation of the insertion device can be arbitrarily set to a direction that is easy to work, so that the worker is large even in a small space or a long time. O-ring insertion work can be performed continuously without imposing a burden.

Next, another embodiment of the present invention will be described. (Second Embodiment) As shown in FIG. 23, this is an example in which the shaft 1 has a divided structure, in which (a) a screw is cut at the tip of a shaft portion 1a of the shaft 1, and a separate guide portion is formed at the screw portion. This is an example in which 40 is integrated by screwing. (B) shows that the shaft part 1a and the guide part 40 are integrally formed,
After the pin 4 is formed separately, the pin 34 is driven into the hole 40c of the guide section 40 by press-fitting to integrate the pin 34 with the shaft section 1a. The separate pins 34 may be integrated by screwing.

According to the second embodiment, by forming the shaft 1 into a divided structure, the shape of the shaft 1 is simplified, and the processing cost of the shaft 1 is reduced in any of the above examples (a) and (b). It becomes reduction. As a modification of the shaft 1, it is possible to omit the two-face width part 41 of the guide part 40 at the tip of the shaft 1 as described above. A mechanism for preventing the rotation of the shaft 1, the holder 2 and the slider 4 by the pins 7 or the like is not required, and the structure is simplified, and the device can be manufactured at a lower cost.

Conversely, several width portions 41 are provided at several places,
The shape may be a square, hexagon, octagon, or the like. (Embodiment 3) As shown in FIG. 24, by using a leaf spring member 61 for part or all of the lever pieces 3a and 3b of the lever member 3, the width across flat portion 41 of the shaft 1 is omitted. Also, the claw pieces 5a and 5b can easily ride on the stepped portion 38.

As a result, the stepped portion 38 is connected to the claw pieces 5a, 5a.
When “b” passes, there is no need to relax the force on the lever member 3, and the operator can work more easily by that amount. However, if the spring constant of the leaf spring member 61 is too small,
When the O-ring 28 is separated, the claw pieces 5a and 5b are less likely to enter between the stacked O-rings 28, so it is necessary to appropriately select the spring constant of the leaf spring member 61. (Embodiment 4) As shown in FIG. 25, the piston 6 is not air, but a spring 62 is mounted in a chamber 29a corresponding to the air chamber 29, and the O-ring 28 is pressed by the spring 62. .

According to this structure, the hole 33 of the shaft 1, the O-rings 24a, 24b, 25, and the pipe joint 26 are not required, so that the structure is simplified, the structure is inexpensive, and the air pipe 27 is eliminated. You will be able to carry the device and work. However, if this embodiment is carried out with the dimensions of the first embodiment, the spring force of the spring 62 must be set so as to push the O-ring 28 up to the last one. When the number is set to be the same as that of the first embodiment, at the beginning of the lamination of the O-ring 28,
Since the spring 62 contracts too much, the force pressing the O-ring 28 becomes too strong, and it becomes difficult for the O-rings 28 to overlap and separate.

For this reason, when the present embodiment is carried out, the number of O-rings 28 to be set on the shaft 1 at one time is reduced (about half) or the size of the chamber 29a is made longer. (It becomes longer overall). (Embodiment 5) FIG. 26 shows a fifth embodiment in which a large diameter O-ring is used as the O-ring 28. Since the diameter of the O-ring 28 is large, a hole 63 for reducing the weight is formed in the shaft 1.
Is provided. In addition, the tip pin portion 34 is the same as that shown in FIG.
It is formed separately as in the example of (b) and is fixed to the shaft 1 by screwing.

The holder 2 is divided into a slider holder 2-1 and a shaft holder 2-2 in order to facilitate processing, and these two 2-1 and 2-2 are integrally connected by a screw-in structure. . As a result, O
A ring 64 is attached to the connection between the two 2-1 and 2-2. Furthermore, in this example, in order to reduce the size and weight of the collar member 18, the O-ring 24a on the inner peripheral side of the collar member 18 is used.
O-rings 24c and 24d are disposed between the shaft 1 and the shaft holder 2-2 instead of the 24b. Further, the bolts 10a and 10b for regulating the opening angle of the lever pieces 3a and 3b are also eliminated, and the opening angle of the lever pieces 3a and 3b is determined to be constant by the dimensions of the lever pieces 3a and 3b and the slider 4. (Embodiment 6) FIG. 27 shows a sixth embodiment of the type in which the direction at the time of the O-ring insertion work is exclusively for downward facing.
Since the sliding member 6a itself corresponding to the piston 6 described above is used as a weight by pressing the O-ring 28 downward with a certain force by the sliding member 6a, no air is required, and the air chamber 29 is not required. Is unnecessary, so that it is not necessary to extend the holder 2 to the vicinity of the tip of the shaft 1 for a long time. Also, O-rings 24a, 24
Also, b and the like become unnecessary, and the structure becomes extremely simple. In addition, since air is not used, it is possible to carry and work anywhere.

In this embodiment, one steel ball 19 is provided, and the collar member 18 is screwed and fixed to the holder 2. As a result, the number of parts and the number of processing steps can be reduced and the cost can be reduced, but the workability of attaching and detaching the shaft 1 deteriorates. Further, the lever pieces 3a and 3b of the lever member 3 and the claw pieces 5a and 5b are integrated to reduce the number of parts to reduce cost. (Embodiment 7) FIGS. 28 and 29 show a seventh embodiment in which an O-ring insertion device is fixed and used. In this embodiment, a slider 4 is used as a fixing member 4 ', and the fixing member 4' is located below the fixing member 4 '. The fixed member 4 'is fixed to an appropriate place in the factory via the fixed base plate 4'a, and the right and left of the lever pieces 3a, 3b of the lever member 3 are connected to the fixed base plate 4'a. Air cylinder 65 supplied with air pressure on both sides
a, 65b, and the air cylinders 65a, 65b
b presses the lever pieces 3a, 3b from the left and right sides thereof to close the claw pieces 5a, 5b, thereby cutting the leading edge O-ring 28
Are separated by one. Then, after the separation of the O-ring 28, the pipe 55 is held against the tip of the shaft 1 by hand,
By moving the pipe 55 together with the shaft 1 toward the rear end of the shaft against the spring 15, the O-ring 28
Slides on the guide section 40 at the tip of the shaft 1 to move the pipe 55
Is inserted into the groove 58 at a predetermined position.

As described above, according to the present embodiment, the O-ring insertion device is fixed via the fixing base plate 4'a.
It is only necessary to hold the pipe 55 in the hand at the time of inserting the ring, and the work load on the operator can be reduced. In this example, the fixing member 4 'corresponding to the slider 4 is fixed to move the pipe 55. However, the holder 2 is fixed instead of the slider 4, and the slider 4 is pushed out by an air cylinder or the like. It is also possible to do so. Also, all operations of the lever member 3 may be manually performed just by fixing the slider 4 or the holder 2 as in the first embodiment.

The present invention can be variously modified in addition to the illustrated embodiment described above, and this modified example will be described below. The nuts 12 and 14 are fixed with nuts 12 and 14 so that the positions of the nuts 11 and 13 can be finely adjusted arbitrarily. After the position of the nuts 11 and 13 has been adjusted, the position of the nuts cannot be changed.
It is also possible to fix 1 and 13.

The nail pieces 5a and 5b are made of hardened steel so as to be hardly worn. The lever pieces 3a and 3b are made of aluminum for weight reduction. When the nail pieces 5a and 5b are worn, they are replaced. The claw pieces 5a, 5b and the lever pieces 3a, 3b are separated and tightened by bolts 16a, 16b for ease of use. However, as in the seventh embodiment shown in FIG. When it is not necessary to perform the operation, the claw pieces 5a and 5b and the lever pieces 3a and 3b may be integrated.

The above-mentioned two fixing methods may be rivets or welding. (Replacement of the claw pieces 5a and 5b may be performed for each of the lever members 3a and 3b.) By taking a long rear portion of the shaft 1, the stopper 22 becomes unnecessary. The air holes 33 provided in the shaft 1 can be replaced by forming grooves on the outer surface of the shaft 1 or forming grooves on the inner peripheral side of the holder 2.

The rotation of the shaft 1 and the holder 2 is stopped by the pin 17, and the rotation of the holder 2 and the slider 4 is stopped by the pins 7a and 7b. However, other structures such as a key and a spline each having a parallel portion are provided. But it is possible. O-ring 2 on collar member 18 to prevent air leakage
4a and 24b are attached, but an O-ring 24c is provided between the shaft 1 and the holder 2 as in the fifth embodiment in FIG.
24d may be attached. However, the O-rings 24c and 24d may be damaged when the shaft 1 is attached and detached. Therefore, when the diameter of the O-ring 24 is small so that the O-ring 24 can be easily replaced, the method of the first embodiment or the like is better.

The number of steel balls 19 is not limited to three,
It is sufficient if there is at least one as in the fifth embodiment. In order to improve the step of detachability of the shaft 1 from the holder 2, the structure is the same as in the first to fourth embodiments. However, if the frequency of replacement of the shaft 1 is low, the collar member as in the fifth embodiment in FIG. A structure in which the shaft 1 is fixed by pressing the steel ball 19 by screwing the steel ball 18, the collar member 18, the steel ball 1
A configuration in which the shaft 1 is directly screwed into the holder 2 or the shaft 1 is fixed by a pin or a bolt, etc., may be used by eliminating 9 or the like.

As described above, the present invention can be embodied in various forms in a wide range when embodying the technical idea.

[Brief description of the drawings]

FIG. 1 is a plan view of a first embodiment of the present invention.

FIG. 2 is a front view of the first embodiment.

FIG. 3 is a side view of the first embodiment.

4A is a sectional view taken along the line AA in FIG. 3, and FIG.
It is a BB sectional view of (a).

5A, 5B, and 5C are a plan view, a front view, and a side view of the shaft of the first embodiment, and FIG.
It is -C sectional drawing.

FIGS. 6 (a) and 6 (b) are an enlarged sectional view and an enlarged perspective view of a shaft tip portion of the first embodiment.

FIGS. 7A and 7B are a plan view and a vertical cross-sectional view of the holder of the first embodiment, and FIGS. 7C and 7D are cross-sectional views of the holder.

FIGS. 8A, 8B, 8C, and 8D are a plan view, a front view, a side view, and a cross-sectional view of the slider of the first embodiment.

FIGS. 9A, 9B, and 9C are a plan view, a front view, and a side view of the lever piece of the first embodiment.

FIGS. 10A and 10B are plan views of the nail according to the first embodiment;
It is a front view.

FIG. 11 is a sectional view of the collar member of the first embodiment.

FIG. 12 is a plan view of an O-ring used in the first embodiment.

FIGS. 13A, 13B, and 13C are cross-sectional views showing three examples of a fluid pipe as an object to be inserted with an O-ring used in the first embodiment.

FIG. 14 is a cross-sectional view showing the first half of the process of mounting the O-ring on the shaft in the first embodiment.

FIG. 15 is a sectional view showing the latter half of the process of attaching the O-ring to the shaft in the first embodiment.

FIG. 16 is a sectional view showing a state before the shaft is mounted on the holder in the first embodiment.

FIG. 17 is a cross-sectional view showing a process of mounting the shaft on the holder in the first embodiment.

FIG. 18 is a cross-sectional view showing a state after the mounting of the shaft to the holder is completed in the first embodiment.

FIG. 19 is a cross-sectional view showing a state after the claw pieces are closed in the first embodiment.

FIG. 20 is a cross-sectional view showing a state after the fluid pipe has been fitted to the tip of the shaft in the first embodiment.

FIG. 21 is a cross-sectional view showing a state in which an O-ring is moved on a tip end of a shaft by a claw in the first embodiment.

FIG. 22 is a cross-sectional view showing a state where an O-ring is inserted into a concave groove of a fluid pipe by a claw in the first embodiment.

FIGS. 23A and 23B are enlarged cross-sectional views of a shaft tip portion showing a second embodiment.

FIG. 24 is a cross-sectional view of the entire apparatus showing the third embodiment.

FIG. 25 is a cross-sectional view of the entire device showing a fourth embodiment.

FIG. 26 is a sectional view of the entire apparatus showing a fifth embodiment.

FIGS. 27 (a) and 27 (b) are a side view and a cross-sectional view of the entire apparatus showing a sixth embodiment.

FIG. 28 is a plan view of the entire apparatus showing a seventh embodiment.

FIG. 29 is a front view of the entire apparatus showing the seventh embodiment.

FIGS. 30 (a) and 30 (b) are a plan view of a fluid pipe for explanation of a conventional apparatus and a half sectional view of a main part of the pipe.

FIGS. 31 (a) and 31 (b) are a plan view and a sectional view of an O-ring for explanation of a conventional device.

32A is a front view of a conventional device, and FIG. 32B is a partial cross-sectional front view showing an O-ring insertion process in the conventional device.

[Explanation of symbols]

 Reference Signs List 1 shaft 2 holder 3 lever member 3a, 3b lever piece 4 slider 5a, 5b claw piece 6 piston (O-ring pressing means) 28 O-ring 38 stepped portion (positioning portion)

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Norio Maruo 1-1-1 Showa-cho, Kariya-shi, Aichi Japan Inside Denso Co., Ltd. (56) References JP-A-4-105827 (JP, A) 79025 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) B23P 19/02

Claims (9)

(57) [Claims] 1. A shaft for holding a large number of O-rings on an outer periphery thereof arranged in the axial direction, a positioning portion formed on a tip end side of the shaft, for positioning the O-ring at the most distal end, and an outer periphery of the shaft. O-ring pressing means for pressing the O-ring toward the tip of the shaft so as to always maintain the foremost O-ring position at a predetermined position determined by the positioning portion; and a holder for detachably holding the shaft at a predetermined position. A slider held on the outer periphery of the holder so as to be slidable in a predetermined range in the axial direction; and a slider held by the slider so as to be openable and closable in the radial direction of the shaft, and configured to be operated by an operator's hand. A pair of claw members each having a claw piece protruding toward an O-ring on the outer periphery of the shaft. When the pair of claw members are closed at the most retracted position from the distal end side of the shaft, only the foremost O-ring is separated by the claw pieces and moved to the distal end side of the shaft, and the object to be inserted is inserted. An O-ring insertion device characterized in that it is configured to be inserted into an O-ring. 2. A shaft for holding a large number of O-rings on the outer periphery thereof in an axial direction, a positioning portion formed on a tip end side of the shaft for positioning the O-ring at the most distal end, and an outer periphery of the shaft. O-ring pressing means for pressing the O-ring toward the tip of the shaft so as to always maintain the most advanced O-ring position of the O-ring at a predetermined position determined by the positioning portion; and a holder for detachably holding the shaft at a predetermined position. A fixing member that fits on the outer periphery of the holder and slidably holds the holder in a predetermined range in the axial direction; and is held by the fixing member so as to be openable and closable in the radial direction of the shaft. And a pair of claw members having claw pieces protruding toward the O-ring of the shaft. The O-ring is characterized in that when the pair of claw members are closed, only the most advanced O-ring is separated by the claw piece and moved toward the distal end of the shaft, so that the O-ring can be inserted into an insertion object. Insertion device. 3. The O-ring insertion device according to claim 2, further comprising claw driving means using fluid pressure for opening and closing said pair of claw members. 4. The O-ring insertion device according to claim 1, further comprising a return unit that returns the slider in a direction of retracting from the distal end side of the shaft. 5. The O-ring pressing means according to claim 1, wherein the O-ring pressing means is a fluid pressure responsive member that presses the O-ring by receiving a fluid pressure that can be introduced into the holder from outside. An O-ring insertion device according to any one of the preceding claims. 6. The O-ring insertion device according to claim 1, wherein the O-ring pressing means is a spring that presses the O-ring by a spring force. 7. The O-ring pressing means comprises a weight member slidably fitted on the outer periphery of the shaft, and is configured to press the O-ring by its own weight. The O-ring insertion device according to any one of claims 1 to 4, wherein 8. The shaft according to claim 1, wherein a guide portion for guiding the movement of the O-ring is formed toward the distal end side from the positioning portion on the shaft. O-ring insertion device. 9. The device according to claim 1, wherein the guide portion has a two-sided width portion for guiding the pair of claw pieces in an axial direction of a shaft. O-ring insertion device.