JPH03251325A - Method and device for inserting o ring - Google Patents

Abstract

PURPOSE:To insert an O ring with its whole periphery being stuck surely, by inserting a 1st cylindrical body whose lower end face is formed in a wavy form and a 2nd cylindrical body whose lower end face is flat with their descents into a recessed part in order. CONSTITUTION:The lower end face of a 1st cylindrical body 12 is formed in a wavy form 12a and that of the 2nd cylindrical body 13 is formed in a flat face 13a. At the internal parts of the cylindrical bodies 12, 13 centering members 14, 18 freely movable vertically, energized by compression springs 15, 19 downward at all times and having spherical projections 14b, 18b fitted into the center hole 2b of the shaft 2 center are provided. An air suction passage 16 is formed between the centering member 14 and 1st cylindrical body 12. The O ring 3 is then sucked to the 1st cylindrical body 12 first and the 1st cylindrical body 12 is descended to the hole of a work W. The O ring 3 is pushed into a recessed part A by keeping the centering state. At this time, the O ring 3 is in the state along the wavy face of the 1st cylindrical body 12 and further its whole periphery is stuck to the bottom of the recessed part A by the descent of the 2nd cylindrical body 13.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method and apparatus for inserting an O-ring having an outer diameter slightly larger than the diameter of the four parts of the work into the bottom of the recess.

(Prior Art) For example, as shown in FIG. 6, there is a work W in which a shaft 2 is inserted into a case 1. A small-diameter stepped portion 2a is formed at the upper end of the shaft 2. Here, a case will be considered in which a sealing O-ring 3 is inserted into the bottom of the space recess A between the stepped portion 211 and the shaft hole of the case 1. The outer diameter of the O-ring 3 is slightly larger than the shaft hole diameter of the case 1, so the Q IJ ring 3 is attached to the case 1 as shown in the figure.
It is fixed at the upper end of the shaft hole. Therefore, the cylindrical body 4 can be forcibly lowered from above and the O-ring 3 can be pushed to the bottom of the recess A. However, if the cylindrical body 4 is simply lowered, the O-ring 3 will fall halfway between the case 1 and the cylindrical body 4. If the O-ring 3 gets caught in the gap between the O-ring 3 and the O-ring 3, the O-ring 3 will be damaged, and even if you are lucky enough to push the O-ring 3 all the way to the bottom of the recess A3, a twisting force will act on the O-ring 3.
Q: It is difficult to bring the IJ ring 3 into close contact with the bottom of the recess A over the entire circumference. Therefore, in order to accurately insert the O-ring 3 into a predetermined position, it is necessary to lower the cylindrical body 4 while rotating it around the front and back, left and right, and up and down axes. If an attempt is made to automate this insertion operation, controlling the position of the cylindrical body 4 becomes extremely difficult.

(Problem to be Solved) This invention has been made in view of the above-mentioned circumstances, and the invention of claim (1) uses two types of cylindrical bodies having different lower end shapes to prevent damage to the O-ring 3. The purpose of the present invention is to provide an insertion method that allows the entire circumference of the bottom of the recess A to be brought into close contact with the bottom of the recess A. The present invention aims to provide an insertion device that can bring the O-ring 3 into partial contact with the bottom of the recess A without damaging it simply by adsorbing the first cylinder and lowering the first cylindrical body.

(Means for Solving the Problems) The present invention provides (1) a method for inserting a Q IJ song having an outer diameter slightly larger than the diameter of the workpiece recess into the bottom of the recess;
The first cylindrical body having a corrugated lower end surface allows the Q IJ
The O-ring insertion method includes pushing the song into the recess and then pressing the QIJ song into close contact with the bottom surface of the recess using a second cylindrical body having a flat lower end surface. and (2) a device for inserting an 01J ring with an outer diameter slightly larger than the diameter of the four parts of the workpiece into the bottom of the recess, which includes a sliding body supported on the controlled object so as to be able to move slightly in a horizontal plane, and a sliding body attached to the sliding body. a vertically oriented first cylindrical body whose outer diameter is slightly smaller than the O-ring outer diameter and whose lower end surface is formed into a wave shape, and which is inserted into the first cylindrical body so as to be vertically movable and is always urged downwardly. a centering member for the workpiece recess,
Between the centering member and the first cylindrical body, the O
The above-mentioned 01 is formed by forming an air suction passage for ring adsorption.
Jing insertion device. It is.

(Function) In the invention of claim (1), the first cylindrical body whose lower end surface is corrugated is pushed into the QIJ song recess. At this time, the QIJ ring is curved along the waveform shape, so that the O-ring is pushed into the QIJ ring. Then, the pressed O-ring is further pressed by the second cylindrical body with a flat lower end surface, and the Q
Make sure the entire circumference of the IJ song is in close contact with the bottom of the recess.

In the invention of claim (2), the O-ring is air-adsorbed using the first cylindrical body, the first cylindrical body is aligned with the center line of the recessed part by the centering member, and the Q IJ is
Push it into the song recess.

(Example) 2 is a terminal controlled object of a known industrial robot that is positioned, for example, by XYz orthogonal coordinates.

A sliding body 11 is provided on the controlled body R so as to be able to move finely in a horizontal plane (xy plane). A first cylindrical body 12 and a second cylindrical body 13 having the same diameter are attached to the sliding body 11 with an interval therebetween in the vertical direction. Each of these cylindrical bodies 12
．． The outer diameter of 13 is set to be slightly smaller than the outer diameter of QIJ ring 3. The lower end surface of the first cylindrical body 12 is formed into a corrugated shape 12a, and the lower end surface of the second cylindrical body 13 is formed into a flat shape 13a.

Reference numeral 14 denotes a centering member for the four parts A of the workpiece W, which is inserted into the first cylindrical body 12 so as to be able to move up and down, and in this embodiment is always urged downward by a bullet 15 (compression spring). The outer periphery of the lower end of the centering member 14 is formed into a tapered shape 14a, and when the bullet 15 is in a downward biased state, the tapered portion 148 is formed in the first cylindrical body 12.
It is located protruding from the bottom edge. Also, centering member 1
A spherical protrusion 141] is provided at the center of the upper end of the shaft 2, and this protrusion 141] connects the tapered hole 2 formed at the center of the upper end of the shaft 2.
1], it is possible to center the first cylindrical body 12 in the recess A.

16 is an air suction passage for suctioning the QIJ ring 3 formed between the first cylindrical body 12 and the centering member 14;
17 is an air hose connected to the passage 16,
It is connected to a known suction source (not shown).

Note that, like the centering member 14, a centering member 18 is also provided inside the second cylindrical body 13 and is urged downward by a bullet 19, and its detailed explanation will be omitted.

/ Then, the position of the controlled body RY is controlled to position the first cylindrical body 12 at the stock position (not shown) of the O-ring 3, and air is sucked into the first cylindrical body 12. In other words, the O-ring 3 is attracted between the lower end of the first cylindrical body 12 and the rib-shaped portion 14a of the centering member 14.

Then, as shown in FIG. 2, the attracted O-ring 3 is positioned above the recess A, and then lowered. Then, as shown in FIG. 3, the protrusion 14b is fitted into the hole 2b, and the centering member 14 is centered with respect to the recess A.
In this state, the O-ring 3 is pushed into the recess A by the first cylindrical body 12.

At this time, since the outer diameter of the O-ring 3 is slightly larger than the diameter of the fourth part A, the O-ring 3 is bent into a shape along the corrugations 12a of the first cylindrical body 12 and is pushed into the recess A.

Next, the controlled body R is raised to remove the first cylindrical body 12 from the recess A, and instead, as shown in FIG. 4, the second cylindrical body 13 is positioned above the recess A, and then lowered. Then the fifth
As shown in the figure, the protrusion 18b is fitted into the hole 2b, and the centering member 18 is centered with respect to the recess A. In this state, the QIJ tongue, which has been pressed into the waveform and has the appropriate size, is attached to the second cylindrical body 13. It is pressed by the flat surface 13a. In other words, the QIJ tongue is brought into close contact with the bottom of the recess A all around.

The foregoing description is only an example; for example, an air cylinder device may be used in place of the bomb 15.19, and the centering member 14.18 may be biased downward by constant air pressure; other configurations may also be used. Replacement with equivalents is also within the scope of this invention.

(Effect of the Invention) Since the present invention is as described above, according to the invention of claim (1), two types of cylindrical bodies 12.
13 into the recess A in order to prevent the O-ring 3 from getting caught in the gap between the cylindrical body 12.13 and the case 1 and damaging it. According to the invention of claim (2), the first cylindrical body 12 can be brought into close contact with the entire circumference.
By simply lowering the O-ring 3, the O-ring 3 adsorbed by the first cylindrical body 12 is not caught in the gap between the cylindrical body 12 and the case 1. It can be inserted in the same position, and the position of the controlled object can be easily controlled.

[Brief explanation of drawings]

1 to 5 show an embodiment of the present invention, and FIG. 1 is an overall schematic diagram of a controlled object. 2 to 5 are partial vertical cross-sectional views of the main parts and action explanatory views, respectively. FIG. 6 is a conventional explanatory diagram. W-work, A... recess, ■... controlled object, 1...
・Case, 2... Shaft, 2a... Step part, 2b... Hole, 3... 0 ring, 11... Sliding body, 12... First cylindrical body, 12a... Waveform Surface, 13... Second cylindrical body, 13a... Flat surface, 14.18... Centering member, 14a, 18 a/f-pa part, 14b, 1
8 b... Protrusion, 15.19... Bullet.

Claims (2)

[Claims] (1) A method of inserting an O-ring with an outer diameter slightly larger than the diameter of the workpiece recess into the bottom of the recess, after the O-ring is pushed into the recess by a first cylindrical body whose lower end surface is formed into a corrugated shape. . The O-ring insertion method as described above, in which the O-ring is pressed against the bottom surface of the recess by the second cylindrical body having a flat lower end surface. (2) A device for inserting an O-ring with an outer diameter slightly larger than the diameter of a workpiece recess into the bottom of the recess, which includes a sliding body supported on a controlled object so as to be able to move slightly in a horizontal plane, and a sliding body attached to the sliding body. , a vertically oriented first cylindrical body whose outer diameter is slightly smaller than the O-ring outer diameter and whose lower end surface is formed into a wave shape, and which is inserted into the first cylindrical body so as to be vertically movable and is constantly urged downward. a centering member for the workpiece recess, and an air suction passage for adsorbing the O-ring is formed between the centering member and the first cylindrical body;
The O-ring insertion device.