JP2009142934A - O-ring mounting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an O-ring mounting device for actualizing the mounting of an O-ring without using a diameter enlarging member. <P>SOLUTION: The O-ring mounting device 10 comprises a plurality of pawls 15, a sliding member 16, a slider 17 for supporting the pawls 15 movably in the direction perpendicular to the axis of each workpiece, a cone member 24, a first cylinder 25 for moving the cone member 24 in the axial direction of the workpiece, a second cylinder 27, a stopper member 31, an O-ring detecting sensor 33, a workpiece detecting sensor 34, and a control part 35 for controlling the movement of the first cylinder 25 and the second cylinder 27. The O-ring applied onto the pawl is transferred to the workpiece by the sliding member. The pawl and the sliding member are driven by the action of the first cylinder and the second cylinder. The operation is performed in an almost automatic manner by the O-ring detecting sensor, the workpiece detecting sensor and the control part. Thus, O-ring mounting work is easily performed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an improvement of an O-ring mounting device that mounts an O-ring on a rod-shaped workpiece.

In order to attach an O-ring to a rod-shaped workpiece, the diameter of the O-ring is generally increased and fitted to one end of the rod-shaped workpiece. For such work, for example, an O-ring mounting device is provided (for example, see Patent Document 1).
Japanese Patent Laid-Open No. 5-1116039 (FIGS. 7, 9, 10, and 12)

Patent document 1 is demonstrated based on the following figure.
FIG. 6 is a view for explaining the basic principle of the prior art. As shown in FIG. 6A, a diameter-expanding member 103 in which an O-ring 101 is pre-fitted to a tapered portion 102 at the tip (lower end in the figure) is a cylinder. It is suspended at 104. The state in which the O-ring 101 is placed on the receiving member 105 by lowering the cylinder 104 is shown in the figure. When the diameter expanding member 103 is further lowered, the O-ring 101 remains on the receiving member 105 and only the diameter expanding member 103 is lowered. At this time, the O-ring 101 is expanded in diameter by the tapered portion 102.

  As shown in FIG. 5B, the diameter expanding member 103 passes through the receiving member 105, and the O-ring 101 is placed on the receiving member 105. Therefore, when the cylinder 104 is moved up, the rod 106 moves away from the diameter expanding member 103. For the next operation, the rod 106 moves horizontally (left in the figure).

As shown in (c), instead of the rod 106, the workpiece 110 suspended by the gripping tool 109 is inserted into the diameter expanding member 103 from above. Even if this insertion is completed, if the lowering of the workpiece 110 is continued, both the workpiece 110 and the diameter expanding member 103 are lowered. The O-ring 101 remains on the receiving member 105. Therefore, when the workpiece 110 is lowered by a certain distance, the O-ring 101 is fitted in the circumferential groove 111 of the workpiece 110.
Next, as shown in (d), the workpiece 110 is raised by the gripping tool 109. The diameter-expanding member 103 remains on the receiving member 105 and raises the workpiece 110 with the O-ring 101 fitted. Next, the diameter-expanding member 103 is collected and returned to (a).
Thus, the O-ring 101 can be fitted to the workpiece 110.

However, the diameter-expanding member 103 needs to reciprocate between the rod 106 and the receiving member 105 during one cycle, and the work becomes complicated. Furthermore, the diameter-expanding member 103 may be lost, and management of the diameter-expanding member 103 becomes troublesome.
Therefore, a simple O-ring mounting device that can mount an O-ring without using a diameter-expanding member is required.

  This invention makes it a subject to provide the O-ring mounting apparatus which can mount | wear with an O-ring, without using a diameter-expansion member.

  The invention according to claim 1 is an O-ring mounting device that expands the diameter of an O-ring and fits to one end of a rod-shaped workpiece, and a plurality of claws that contact the inner peripheral surface of the O-ring, A sliding member which is provided so as to be movable in the axial direction and has one end facing an O-ring fitted in the claw, a slider for supporting the claw so as to be movable in a direction perpendicular to the axis of the workpiece, and the slider A cone member having a tapered surface slidably contacting an inclined surface provided to be inclined to the workpiece axis, a first cylinder for moving the cone member in the axial direction of the workpiece, the first cylinder, and the slider And a second cylinder that collectively moves a plurality of claws in the axial direction of the workpiece, and when the claws are retracted by a certain distance by the second cylinder, the pawls are allowed to move backward, but the sliding member is moved. A stopper member that pushes out the O-ring fitted in the claw to the front of the claw, an O-ring detection sensor that is provided around the plurality of claws and detects the presence or absence of the O-ring, and detects the presence or absence of the workpiece Based on the workpiece detection sensor and the O-ring detection information generated by the O-ring detection sensor, the first cylinder is advanced, the claw is opened to hold the O-ring, and then the second cylinder is retracted by a certain distance. The second cylinder is further retracted based on the information detected by the workpiece detection sensor for the workpiece applied to the tip of the claw, and the O-ring is moved from the claw to the workpiece by the sliding member. And a controller that performs a series of controls that continue to move backward until it is moved to.

  The invention according to claim 2 is characterized in that the claw faces upward, the first cylinder is disposed below the claw, and the second cylinder is disposed below the first cylinder.

In the invention according to claim 1, the O-ring hung on the claw is transferred to the workpiece by the sliding member. Such a sliding member is attached to the nail and there is no risk of losing it. The claw and the sliding member are driven directly or indirectly by the action of the first cylinder and the second cylinder, and the operation is almost automatically performed by the O-ring detection sensor, the workpiece detection sensor, and the control unit.
As a result, even an unskilled worker can easily perform the O-ring mounting operation.

  In the invention according to claim 2, since the nail faces upward, the O-ring can be set on the nail with one hand from above. Therefore, the work becomes easy and the work with one hand is also possible.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a configuration diagram of an O-ring mounting device according to the present invention. An O-ring mounting device 10 includes, for example, a lower frame 12 installed on a floor 11 and struts 13 raised from both ends of the lower frame 12. 13, a top plate 14 provided at the upper ends of these columns 13, a plurality of claws 15 that abut on the inner peripheral surface of the O-ring, and these claws 15 are provided so as to be movable in the axial direction of the workpiece. A sliding member 16 having one end facing an O-ring fitted to the claws, a slider 17 that supports the claws 15 so as to be movable in the direction perpendicular to the axis of the workpiece, and an elastic member 18 provided on these sliders 17 A cone member 24 having a rail portion 21 for mounting these sliders, a tapered surface 23 slidably contacting an inclined surface 22 provided on the slider 17 so as to be inclined with respect to the axis of the workpiece, and the cone member A first cylinder 25 that moves 4 in the axial direction of the workpiece, a moving frame 26 on which the first cylinder 25 is placed, a second cylinder 27 that is provided on the lower frame 12 and moves the moving frame 26 in the axial direction of the workpiece, When the claw 15 is retracted by a certain distance by the second cylinder 27, the claw 15 is allowed to recede, but a stopper member 31 that prevents the sliding member 16 from moving, and the claw 15 provided on the stopper member is expanded. A cylindrical member 32 to be restricted, an O-ring detection sensor 33 provided around the plurality of claws 15 to detect the presence or absence of an O-ring, a work detection sensor 34 to detect the presence or absence of a work, the first cylinder 25 and the second The control unit 35 controls the movement of the cylinder 27.

  2 is a cross-sectional view taken along the line 2-2 in FIG. 1, and the claw 15 is provided with grooves 41 and 41, and L-shaped plates 43 and 43 are hooked in these grooves 41 and 41, respectively. The L-shaped plates 43 and 43 are fixed to the sliding member 16 with screws 42 and 42. Thus, the sliding member 16 is supported so as to be slidable in the direction of the front and back of the figure.

The operation of the O-ring mounting device 10 having the above configuration will be described next.
FIG. 3 is a diagram for explaining the process from the O-ring placement process to the O-ring expansion process. As shown in FIG. 3A, the operator moves the O-ring 45 indicated by an imaginary line with the finger 44 to As described above, the sliding members 16 and 16 are placed on one end. The inner peripheral surface of the O-ring 45 is in a state where it can come into contact with the plurality of claws 15. Since the plurality of claws 15, 15 are closed, the operator can place the O-ring 45 without expanding the natural inner diameter of the O-ring 45.
The O-ring detection sensor 33 detects the O-ring 45 placed on one end of the sliding members 16 and 16, and the following operation is started.

  As shown in (b), when the first cylinder 25 is moved forward, the cone member 24 rises in the direction of the arrow (2), and the tapered surface 23 slides in contact with the inclined surface 22 of the slider 17. As a result, the sliders 17 and 17 are pushed right and left as indicated by the arrow (3). Accordingly, the claws 15 and 15 open to the left and right as indicated by the arrow (3) to grip the O-ring 45, and the diameter of the O-ring 45 is expanded. When the sliding members 16, 16 hit the cylindrical member 32, the cone member 24 stops.

FIG. 4 is a diagram for explaining the process from the second cylinder lowering process to the workpiece placing process. As shown in FIG. 4A, the second cylinder 27 is moved downward to move the O-ring 45, the claws 15, 15, and the sliding. The moving members 16, 16, the sliders 17, 17, the cone member 24, and the first cylinder 25 are collectively lowered in the direction of the arrow (4). At the position where the sliding members 16, 16 come into contact with the stopper piece 31, the second cylinder 27 is temporarily stopped.
In addition, although it divided into FIG.1 (b) and FIG.2 (a) for description, actually operation | movement of FIG.1 (b) and FIG.2 (a) is performed simultaneously. The O-ring 45 moves in the direction of the arrow (4) while expanding as indicated by the arrow (3).

Next, as shown in (b), the operator holds the bar-shaped workpiece 46 with the finger 44 and places it on the ends of the claws 15 and 15 as shown by the arrow (5).
The work detection sensor 34 detects the work 46 placed on the ends of the claws 15 and 15, and the following operation is started.

  FIG. 5 is a diagram for explaining the process from the O-ring mounting process to the origin return process. As shown in FIG. 5A, by further lowering the second cylinder 27, the workpiece 46, the claws 15, 15, the slider 17, 17, the cone member 24, and the first cylinder 25 collectively start to move further in the direction of the arrow (6). During the lowering operation of the second cylinder 27, the work 46 is pressed with the finger 44.

At this time, the stopper member 31 prevents the sliding members 16 and 16 from moving. As a result, the O-ring 45 is pushed out by the sliding members 16 and 16 as shown by the arrow (7). Since the inner diameter of the expanded O-ring 45 is larger than the diameter of the workpiece 46, the O-ring can move from the claws 15 and 15 to the workpiece 46.
Then, the second cylinder 27 stops at a position where the O-ring 45 is fitted in the groove of the work 46.

Next, as shown in (b), the work 46 is removed with the finger 44 as shown by the arrow (8). As a result, the workpiece 46 with the O-ring 45 attached is obtained.
The work detection sensor 34 detects that the work 46 has disappeared, and the origin return is started.

First, when the first cylinder 25 is lowered, the cone member 24 is lowered in the direction of the arrow (9). Then, the sliders 17 and 17 are closed as indicated by an arrow (10) by the action of the elastic members 18 and 18.
Next, by moving the second cylinder 27 forward, the claws 15 and 15, the sliders 17 and 17, the cone member 24, and the first cylinder 27 are collectively raised as indicated by an arrow (11). As a result, the return to origin is completed.

  The O-ring hung on the claw is transferred to the workpiece by the sliding member. The claw and the sliding member are driven directly or indirectly by the action of the first cylinder and the second cylinder, and the operation is almost automatically performed by the O-ring detection sensor, the workpiece detection sensor, and the control unit. As a result, even an unskilled worker can easily perform the O-ring mounting operation with a small number of steps.

  In addition, although it was set as the structure which uses the nail | claw 15 in the Example, it shows an example and can change a structure suitably.

  The O-ring mounting device of the present invention is suitable for an O-ring mounting device that mounts an O-ring on a rod-shaped workpiece.

It is a block diagram of the O-ring mounting device according to the present invention. FIG. 2 is a sectional view taken along line 2-2 of FIG. It is a figure explaining an O ring mounting process to an O ring expansion process. It is a figure explaining a 2nd cylinder lowering process to a workpiece | work mounting process. It is a figure explaining from an O-ring mounting process to an origin return process. It is a figure explaining the basic principle of the prior art.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... O-ring mounting apparatus, 15 ... Nail | claw, 16 ... Sliding member, 17 ... Slider, 22 ... Inclined surface, 23 ... Tapered surface, 24 ... Cone member, 25 ... 1st cylinder, 27 ... 2nd cylinder, 31 ... Stopper member 33 ... O-ring detection sensor 34 ... Work detection sensor 35 ... Control unit 45 ... O-ring 46 ... Workpiece

Claims (2)

In the O-ring mounting device that expands the diameter of the O-ring and fits to one end of a rod-shaped workpiece,
A plurality of claws in contact with the inner peripheral surface of the O-ring;
A sliding member provided at one end of an O-ring that is provided on these claws so as to be movable in the axial direction of the workpiece and is fitted on the claws;
A slider for supporting the claws movably in a direction perpendicular to the axis of the workpiece,
A cone member having a taper surface slidably contacting an inclined surface provided to be inclined with respect to the axis of the workpiece on the slider;
A first cylinder for moving the cone member in the axial direction of the workpiece;
A second cylinder that collectively moves the first cylinder, the slider, and the plurality of claws in the axial direction of the workpiece;
A stopper member that allows the claw to recede when the claw is retracted by a certain distance by the second cylinder, but prevents the sliding member from moving, and pushes the O-ring fitted in the claw forward of the claw;
An O-ring detection sensor for detecting the presence or absence of an O-ring and a workpiece detection sensor for detecting the presence or absence of a workpiece, which are provided around the plurality of claws;
Based on the O-ring detection information generated by the O-ring detection sensor, the first cylinder is moved forward, the claw is opened to grip the O-ring, and then the second cylinder is moved backward by a predetermined distance to enter a standby state. The second cylinder starts to further retract based on the information detected by the workpiece detection sensor for the workpiece applied to the tip of the claw, and then retracts until the O-ring is moved from the claw to the workpiece by the sliding member. And an O-ring mounting device comprising a control unit that performs a series of controls.   2. The O-ring mounting device according to claim 1, wherein the claw is directed upward, the first cylinder is disposed below the claw, and the second cylinder is disposed below the first cylinder.

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