JP2012024892A - Ring-shaped seal suction nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ring-shaped seal suction nozzle that further flexibly and stably sucks and adsorbs a ring-shaped seal as an object to be sucked.SOLUTION: The ring-shaped seal suction nozzle 100 for sucking the ring-shaped seal S, includes: a facing part 101 for facing the ring-shaped seal S as the object to be sucked; and a ring-shaped suction groove 102 formed in the facing part 101, and whose shape corresponds to the shape of the ring-shaped seal S. The cross-sectional shape of the suction groove 102 includes two line segments that serve as tangent lines relative to curved lines defined by the cross-sectional shape of the ring-shaped seal S.

Description

  The present invention relates to a ring-shaped seal suction nozzle for adsorbing a ring-shaped seal.

  Conventionally, the ring-shaped packing P placed on the positioning table 11 using the suction head 31 is sucked and sucked to the cap C to be mounted, and the ring-shaped packing is inserted into the mounting groove c2 of the cap C. An automatic ring-shaped packing mounting machine that accurately positions P is known (see, for example, FIG. 8 of Patent Document 1).

  The suction head 31 has a head main body 32 that faces the ring-shaped packing P that is a suction target, and a concave suction surface (suction groove) 33 c is formed on the bottom plate 33 a of the lower main body 33 constituting the head main body 32. Has been.

  The concave suction surface (suction groove) 33c is formed so as to coincide with the shape of substantially the upper half of the ring-shaped packing P, so that the suction head 31 can suck and suck the ring-shaped packing P without displacement.

  However, the concave suction surface (suction groove) 33c described in Patent Document 1 is semicircular so that the cross-sectional shape (circular) of the ring-shaped packing P that is the subject of suction fits exactly in the upper half. Therefore, the standard size ring-shaped packing P accurately placed on the positioning table 11 can be selectively sucked and adsorbed, while the ring-shaped packing P is not accurately placed on the positioning table 11 or If the shape or size of the ring-shaped packing P has a variation within the tolerance range, the ring-shaped packing P may not be sucked / sucked.

  In view of the above-described points, an object of the present invention is to provide a ring-shaped seal suction nozzle that can suck and suck a ring-shaped seal that is a suction target more flexibly and stably.

  In order to achieve the above-described object, a ring-shaped seal suction nozzle according to an embodiment of the present invention is a ring-shaped seal suction nozzle that sucks a ring-shaped seal, and is a facing portion that faces the ring-shaped seal to be sucked. And a ring-shaped suction groove corresponding to the shape of the ring-shaped seal formed in the facing portion, and the cross-sectional shape of the suction groove is a tangent to the curve drawn by the cross-sectional shape of the ring-shaped seal It is characterized by including two line segments.

  With the above-described means, an object of the present invention is to provide a ring-shaped seal suction nozzle that can suck and suck a ring-shaped seal that is a suction target more flexibly and stably.

It is a perspective view which shows the structural example of a general purpose assembly machine. It is a bottom perspective view of a ring-shaped seal suction nozzle. It is sectional drawing (the 1) of a ring-shaped seal | sticker adsorption nozzle and an O-ring. It is an upper surface perspective view of an O-ring supply machine. It is sectional drawing of a ring-shaped seal | sticker adsorption nozzle, an O-ring, and a workpiece | work. It is sectional drawing of an assembly | attachment member, an O-ring, and a workpiece | work. It is explanatory drawing of operation | movement of a general purpose assembly machine. It is FIG. (1) which shows the cross-sectional shape of an adsorption | suction groove | channel. It is a figure (the 2) which shows the cross-sectional shape of an adsorption | suction groove | channel. It is FIG. (3) which shows the cross-sectional shape of a suction groove. It is FIG. (4) which shows the cross-sectional shape of an adsorption | suction groove | channel. It is sectional drawing (the 2) of a ring-shaped seal | sticker adsorption nozzle and an O-ring. It is FIG. (5) which shows the cross-sectional shape of a suction groove. It is FIG. (6) which shows the cross-sectional shape of a suction groove. It is a figure (the 7) which shows the cross-sectional shape of an adsorption | suction groove | channel. It is a comparison figure of the adsorption groove from which cross-sectional shape differs.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view illustrating a configuration example of a general-purpose assembly machine (pick and place machine) 10 in which a ring-shaped seal suction nozzle 100 according to an embodiment of the present invention is incorporated. The base 11, the X-axis stage 12 attached to the base 11 and slidable in the X1-X2 axial direction with respect to the base 11, and the slidable in the Z1-Z2 axial direction with respect to the X-axis stage 12 attached to the X-axis stage 12 It is composed of a Z-axis stage 13.

  The general-purpose assembly machine 10 includes a ring-shaped seal suction nozzle 100 at the tip of the Z-axis stage 13 in the X1 direction. By operating the X-axis stage 12 and the Z-axis stage 13, the ring-shaped seal suction nozzle 100 is moved to X1. It is comprised so that it can move to each of -X2 axial direction and Z1-Z2 axial direction.

  The ring-shaped seal suction nozzle 100 is a nozzle for sucking the ring-shaped seal S, and sucks and sucks the ring-shaped seal S on the lower surface of the nozzle by using suction by a vacuum device (not shown).

  The ring-shaped seal S is a seal member that is inserted between two opposing surfaces each having a circular opening that leads to a conduit. For example, the cross-sectional shape of the ring-shaped seal S includes a circular or elliptical curve. The sealing member may be any of a gasket in which the seal portion is fixed with a bolt or the like, and a packing in which the seal portion is a movable portion. In this embodiment, the ring-shaped seal suction nozzle 100 sucks and sucks an O-ring S having a circular cross section, which is an example of the ring-shaped seal S.

  FIG. 2 is a bottom perspective view of the ring-shaped seal suction nozzle 100 as viewed obliquely from below, and FIG. 3 is a cross-sectional view of the ring-shaped seal suction nozzle 100 and the O-ring S that is the suction target.

  In the present embodiment, the ring-shaped seal suction nozzle 100 has a nozzle tip that sucks and sucks the O-ring S on the surface of a work W (described later with reference to FIG. 5) to which the O-ring S is attached. While inserting into the formed O-ring mounting recess W1 (for example, a cylindrical shape), the O-ring S can be mounted in the ring-shaped mounting groove W2 formed on the bottom surface of the O-ring mounting recess W1. It has a columnar main body 105 extending in the Z1-Z2 axial direction along the side wall surface of the O-ring mounting recess W1. In addition, the main-body part 105 may have other shapes (for example, it is a prism) other than a cylinder according to the shape of the recessed part W1 for O-ring mounting | wearing.

  The ring-shaped seal suction nozzle 100 has a facing portion 101 facing the O-ring S to be sucked at the tip in the Z2 direction, a suction groove 102 formed on the Z2 side surface of the facing portion 101, and a suction groove 102. A plurality of openings 103 formed therein are provided.

  Similar to the main body portion 105, the facing portion 101 has a cylindrical shape extending in the Z1-Z2 axial direction along the side wall surface of the O-ring mounting recess W1. Similar to the main body portion 105, the facing portion 101 may have a shape other than a column (for example, a prism) according to the shape of the O-ring mounting recess W1.

  The suction groove 102 is a ring-shaped groove that substantially matches the ring shape of the O-ring S to be suctioned. Preferably, when the O-ring S is sucked and sucked, the height of the O-ring S (wire diameter) D) configured to accept less than half.

  The openings 103 are openings that are formed at the bottom of the suction groove 102 and communicate with the suction air flow path 104 connected to the vacuum apparatus. For example, ten openings 103 are formed at equal intervals along the circumference of the suction groove 102. However, as long as the O-ring S can be stably sucked and adsorbed, the number may be smaller or larger.

  Note that the surface of the facing portion 101 may be subjected to a low friction treatment by Teflon coating or silver stone coating. This is to prevent the O-ring S from coming into close contact with the facing portion 101 and becoming difficult to separate.

  The general-purpose assembling machine 10 uses such a ring-shaped seal suction nozzle 100, and the O-ring feeder 20 (see FIG. 1) arranged adjacent to the general-purpose assembling machine 10 is accurately placed one by one at a predetermined position. Then, the O-ring S supplied and arranged is sucked and adsorbed, and then accurately conveyed one by one to a predetermined position by a conveyor 30 (see FIG. 1) also arranged adjacent to the general-purpose assembly machine 10. The sucked / sucked O-ring S is transported to the workpiece W, and the O-ring S is mounted in the ring-shaped mounting groove W2 on the bottom surface of the O-ring mounting recess W1 formed on the surface of the workpiece W.

  FIG. 4 is an enlarged top perspective view of the O-ring supply machine 20 as viewed obliquely from above, in which the region indicated by the broken-line circle CR1 in FIG. 1 is enlarged. The O-ring supply machine 20 is, for example, a vibration-type component supply device (see FIG. The O-ring S is sequentially fed in the X1 direction along the O-ring supply groove 21 and the O-ring S located at the tip of the O-ring supply groove 21 in the X1 direction is sucked and Each time the sucked and transported toward the workpiece W on the conveyor 30, the next O-ring S is pushed into the space so as to fill the space occupied by the transported O-ring S.

  5 is a cross-sectional view of the ring-shaped seal suction nozzle 100, the O-ring S, and the work W, and FIG. 6 is a cross-sectional view of the assembly member M, the O-ring S, and the work W.

  In FIG. 5, the cylindrical main body 105 of the ring-shaped seal suction nozzle 100 is inserted into a cylindrical O-ring mounting recess W <b> 1 formed on the surface of the workpiece W, and is sucked and sucked by the ring-shaped seal suction nozzle 100. The state immediately before the O-ring S is mounted in the ring-shaped mounting groove W2 on the bottom surface of the O-ring mounting recess W1 is shown.

  FIG. 6 shows a state immediately after the O-ring S is mounted in the ring-shaped mounting groove W2 and immediately before the assembly member M is assembled to the workpiece W by another assembly machine (not shown).

  5 and 6, the workpiece W includes a conduit W3 inside the ring of the ring-shaped mounting groove W2, and the assembly member M includes a conduit M3 inside the ring of the ring-shaped mounting groove M2. .

  The O-ring S mounted in the ring-shaped mounting groove W2 includes a conduit M3 drilled in the assembly member M and a conduit W3 drilled in the workpiece W when the assembly member M is assembled to the workpiece W. And to be connected hermetically.

  Next, referring to FIG. 7, the general-purpose assembly machine 10 sucks and sucks the O-ring S accurately disposed in the O-ring supply groove 21 of the O-ring supply machine 20 by the ring-shaped seal suction nozzle 100, The operation of the general assembly machine 10 when transporting the sucked / sucked O-ring S to the O-ring mounting recess W1 formed on the surface of the workpiece W on the conveyor 30 will be described.

  FIG. 7A shows a state in which the ring-shaped seal suction nozzle 100 is disposed directly above the O-ring S located at the tip of the O-ring supply groove 21 in the X1 direction. In this state, the general-purpose assembly machine 10 Operates the Z-axis stage 13 to move (lower) the ring-shaped seal suction nozzle 100 in the Z2 direction so that the ring-shaped seal suction nozzle 100 and the O-ring S are brought into contact with each other.

  FIG. 7B shows a state in which the ring-shaped seal suction nozzle 100 sucks and sucks the O-ring S located at the tip of the O-ring supply groove 21 in the X1 direction. In this state, the general-purpose assembly machine 10 The Z-axis stage 13 is operated to move the ring-shaped seal suction nozzle 100 in the Z1 direction (raise it).

  FIG. 7C shows that the ring-shaped seal suction nozzle 100 that sucks and sucks the O-ring S has the same arrangement as FIG. 7A. In this state, the general-purpose assembly machine 10 The shaft stage 12 is operated to move the ring-shaped seal suction nozzle 100 in the X1 direction (the direction in which the workpiece W exists).

  FIG. 7D shows a state in which the ring-shaped seal suction nozzle 100 is disposed immediately above the O-ring mounting recess W1 formed on the surface of the workpiece W on the conveyor 30. In this state, The auxiliary machine 10 operates the Z-axis stage 13 to move the ring-shaped seal suction nozzle 100 in the Z2 direction (lowers), and inserts the ring-shaped seal suction nozzle 100 (O-ring S) into the O-ring mounting recess W1. To do.

  FIG. 7E shows a state in which the ring-shaped seal suction nozzle 100 is mounted with an O-ring S in a ring-shaped mounting groove W2 formed on the bottom surface of the O-ring mounting recess W1, and in this state, general-purpose assembly is performed. After stopping the suction by the vacuum device, the machine 10 operates the Z-axis stage 13 to move (raise) the ring-shaped seal suction nozzle 100 in the Z1 direction. At this time, the vacuum device may perform the vacuum break by generating a slight positive pressure when stopping the suction.

  FIG. 7F shows that the ring-shaped seal suction nozzle 100 after the O-ring S is mounted in the ring-shaped mounting groove W2 formed on the bottom surface of the O-ring mounting recess W1 has the same arrangement as FIG. In this state, the general assembly machine 10 operates the X-axis stage 12 to move the ring-shaped seal suction nozzle 100 in the X2 direction and returns to the state of FIG. Prepare for suction / adsorption of O-ring S.

  Next, various cross-sectional shapes of the suction groove 102 will be described with reference to FIGS. 8 to 11 are enlarged cross-sectional views each showing a region represented by a broken-line circle CR <b> 2 in FIG. 3, and show a state when the O-ring S is arranged in the suction groove 102. Note that the cross section of the O-ring S is expressed without using hatching for the sake of clarity.

  FIG. 8 is a diagram illustrating a cross-sectional shape of the suction groove 102a that is an example of the suction groove 102, where the point CC indicates the center point of the O-ring S and the distance D1 indicates the wire diameter of the O-ring S.

  Points TP1 and TP2 indicate two contact points between a circle drawn by the cross section of the O-ring S (hereinafter referred to as “cross-sectional circle”) and the cross-sectional shape of the suction groove 102a, and the distance D2 is a contact point TP1. The distance in the X1-X2 axial direction between the contact point TP2 and the contact point TP2.

  The cross-sectional shape of the suction groove 102a includes a part of a tangent to the cross-sectional circle passing through the contact TP1 and a part of a tangent to the cross-sectional circle passing through the contact TP2, and the point CP1 is an intersection of the two tangents. The distance D3 indicates the distance in the Z1-Z2 axial direction between the surface on the Z2 side of the facing portion 101 (hereinafter referred to as “facing surface”) and the intersection CP1.

  Furthermore, the angle α1 indicates an angle formed between the line segment CC-TP1 and the line segment CC-TP2, and the angle β1 is opposite to the line segment CP1-TP1 (tangent to the cross-sectional circle passing through the contact point TP1). The angle formed between the surface and the line segment CP1-TP2 (tangent to the cross-sectional circle passing through the contact point TP2) and the opposing surface, and the angle γ1 is the line segment CP1- The angle formed between TP1 (tangent to the cross-sectional circle passing through contact TP1) and line segment CP1-TP2 (tangent to the cross-sectional circle passing through contact TP2) is shown.

  In the present embodiment, the suction groove 102a is arranged such that the contacts TP1 and TP2 are both disposed on the opposing surface (that is, the contacts TP1 and TP2 are disposed at the respective end portions of the two side walls of the suction groove 102a, The circular seal TP1-TP2 in the cross-sectional circle of the O-ring S is sucked and sucked by the ring-shaped seal suction nozzle 100), and the angle α1 is less than 180 degrees (preferably less than 90 degrees). Thus, the angle γ1 and the distance D3 are determined.

  Note that the width or diameter of the opening 103 (see FIG. 2) is smaller than the distance D2, and the O-ring S and the opening in the suction groove 102a when the O-ring S is sucked and sucked into the suction groove 102a. 103 so that a clearance is left between the O-ring S and the adsorption area of the O-ring S is sufficiently large (a size represented by the arc TP1-TP2 in the cross-sectional circle of the O-ring S).

  With this configuration, the suction groove 102a can make the angle β1 relatively small as compared with the case where the cross-sectional shape of the suction groove is an arc shape or a rectangular shape (see FIG. 16). The possibility that the ring-shaped seal suction nozzle 100 damages the surface of the O-ring S when the O-ring S is sucked and sucked while pressing the opposing portion 101 against the O-ring S can be reduced (the damage prevention property is improved). In addition, the O-ring S including the size variation can be sucked and sucked more flexibly and stably (the sucking and sucking performance can be improved).

  Further, the suction groove 102a has a position where the O-ring S arranged in the O-ring supply groove 21 is at a predetermined position (a position where the cross-sectional circle of the O-ring S contacts with two cross-sectional shapes of the suction groove 102a). Even if it is slightly deviated from the above, the surface 101 of the O-ring S is damaged by pressing the opposing portion 101 of the ring-shaped seal suction nozzle 100 against the O-ring S. Since the O-ring S is guided (slid) to the predetermined position while preventing, the centering property with respect to the O-ring S can be improved.

  Further, the suction groove 102a has an arc TP1 in the cross-sectional circle of the O-ring S (corresponding to an angle α1 of less than 90 degrees) with the groove width D2 being the minimum necessary size for sucking and sucking the O-ring S. Since the ring-shaped seal suction nozzle 100 is configured to suck and suck the portion of TP2, the opposed portion 101 is reliably prevented from coming into contact with the bottom surface of the O-ring mounting recess W1 in the workpiece W to be mounted. can do.

  FIG. 9 is a diagram showing a cross-sectional shape of the suction groove 102b, which is another example of the suction groove 102, and the distance D5 in the Z1-Z2 axial direction between the facing surface and the intersection CP1 is compared with the distance D3 in FIG. And the contact points TP1 and TP2 are not arranged on the opposing surface (the contact points TP1 and TP2 are not arranged at the respective end portions of the two side walls of the suction groove 102b). Although different from the case of FIG. 8 in that they are arranged in the middle, they are common to the case of FIG. 8 in other points.

  Therefore, the distance D4 indicating the groove width (the distance between the end portions of the two side walls of the suction groove 102b) is larger than the distance D2 indicating the distance in the X1-X2 axial direction between the contact TP1 and the contact TP2. It has become a thing.

  With this configuration, even if the size of the O-ring S varies within the tolerance range, the suction groove 102b has at least one of the two side walls when the O-ring S is sucked / sucked. Since it is configured to be tangent to the cross-sectional circle of S, the O-ring S having a variation in size can be sucked and sucked more flexibly and stably than other cross-sectional shapes (the sucking and sucking). Can be improved.)

  Further, since the suction groove 102b has a groove width D4 larger than the groove width D2 of the suction groove 102a of FIG. 8, the O-ring S is sucked and pressed while the opposing portion 101 of the ring-shaped seal suction nozzle 100 is pressed against the O-ring S. The possibility of damaging the surface of the O-ring S during the adsorption can be further reduced (the damage prevention property can be further improved).

  FIG. 10 is a diagram showing a cross-sectional shape of a suction groove 102c, which is still another example of the suction groove 102. Points TP3 and TP4 are two points between the cross-sectional circle of the O-ring S and the cross-sectional shape of the suction groove 102c. The distance D6 indicates the distance in the X1-X2 axial direction between the contact TP3 and the contact TP4.

  The cross-sectional shape of the suction groove 102c includes a part of a tangent to the cross-sectional circle passing through the contact TP3 and a part of a tangent to the cross-sectional circle passing through the contact TP4, and the point CP2 is an intersection of the two tangents. The distance D8 indicates the distance in the Z1-Z2 axial direction between the facing surface and the intersection CP2.

  Furthermore, the angle α2 indicates an angle formed between the line segment CC-TP3 and the line segment CC-TP4, and the angle β2 is opposite to the line segment CP2-TP3 (tangent to the cross-sectional circle passing through the contact point TP3). The angle formed between the surface and the line CP2-TP4 (tangent to the cross-sectional circle passing through the contact TP4) and the opposite surface are shown. The angle γ2 is the line CP2- Indicates the angle formed between TP3 (tangent to its cross-sectional circle passing through contact TP3) and line segment CP2-TP4 (tangent to its cross-sectional circle passing through contact TP4).

  The suction groove 102c in FIG. 10 is different from the suction groove 102b in FIG. 9 in that the angle β2 is smaller than the angle β1 and the angle γ2 is larger than the angle γ1, but the suction groove 102b in FIG. Common.

  Therefore, the contacts TP3 and TP4 are not arranged on the opposing surface (the contacts TP3 and TP4 are not arranged at the respective end portions of the two side walls of the suction groove 102c) and are arranged in the middle of the two side walls of the suction groove 102c. Therefore, the distance D7 indicating the distance in the X1-X2 axial direction between the respective end portions of the two side walls of the suction groove 102c is the distance indicating the distance in the X1-X2 axial direction between the contact TP3 and the contact TP4. It is larger than D6.

  With this configuration, the suction groove 102c has an angle β2 smaller than the angle β1 in the suction groove 102b of FIG. 9, and the angle formed by the opposing surface and the side wall of the suction groove 102c becomes a larger angle (obtuse angle). Therefore, the possibility that the ring-shaped seal suction nozzle 100 damages the surface of the O-ring S when the O-ring S is sucked and sucked while pressing the opposing portion 101 of the ring-shaped seal suction nozzle 100 against the O-ring S is further reduced. (The damage prevention property can be further improved.)

  Further, the suction groove 102c has a ring-shaped mounting formed on the ring center of the O-ring S sucked and sucked by the ring-shaped seal suction nozzle 100 and the bottom surface of the O-ring mounting recess W1 of the workpiece W depending on the cross-sectional shape thereof. Even when the center of the ring of the groove W2 is slightly deviated, the sucked / sucked O-ring S is pressed against the ring-shaped mounting groove W2 so as to be guided (slid) so as to fit into the ring-shaped mounting groove W2. And the assembling property of the O-ring S with respect to the ring-shaped mounting groove W2 can be improved. In this case, the suction by the vacuum device may be terminated when the O-ring S is pressed against the ring-shaped mounting groove W2. This is to make the O-ring S slide more easily. This effect is also obtained when the contacts TP3 and TP4 are arranged on the opposing surface.

  FIG. 11 is a diagram showing a cross-sectional shape of a suction groove 102d, which is still another example of the suction groove 102, and points TP5 and TP6 are two points between the cross-sectional circle of the O-ring S and the cross-sectional shape of the suction groove 102d. The distance D9 indicates a distance in the X1-X2 axial direction between the contact TP5 and the contact TP6.

  The cross-sectional shape of the suction groove 102d includes a part of a tangent to the cross-sectional circle passing through the contact TP5 and a part of a tangent to the cross-sectional circle passing through the contact TP6, and a point CP3 is an intersection of the two tangents. The distance D11 indicates the distance in the Z1-Z2 axial direction between the facing surface and the intersection CP3.

  Further, the angle α3 indicates an angle formed between the line segment CC-TP5 and the line segment CC-TP6, and the angle β1 (the same angle as in FIGS. 8 and 9) is the line segment CP3. -TP5 (the tangent to the cross-sectional circle passing through the contact TP5) and the angle formed between the opposing surface and the angle β2 (the same angle as in FIG. 10) is the line segment CP3-TP6 (contact The angle formed between the opposing surface and a tangent to the cross-sectional circle passing through TP6), and the angle γ3 is a line segment CP3-TP5 (a tangent to the cross-sectional circle passing through the contact TP5) and a line segment CP3-TP6 ( And the angle formed with the tangent to the cross-sectional circle passing through the contact TP6.

  The suction groove 102d of FIG. 11 is different from the suction groove 102b of FIG. 9 and the suction groove 102c of FIG. 10 in that the angle β1 and the angle β2 are different, but the suction groove 102b and FIG. The suction groove 102c is common.

  Therefore, the contacts TP5 and TP6 are not arranged on the opposing surface (the contacts TP5 and TP6 are not arranged at the respective end portions of the two side walls of the suction groove 102d) and are arranged in the middle of the two side walls of the suction groove 102d. Therefore, the distance D10 indicating the distance in the X1-X2 axial direction between the respective end portions of the two side walls of the suction groove 102d is the distance indicating the distance in the X1-X2 axial direction between the contact TP5 and the contact TP6. It is larger than D9.

  With this configuration, the suction groove 102d has an outer diameter of a relatively small angle β2 while improving the centering performance with respect to the O-ring S whose outer diameter varies to a side larger than the standard size by a relatively large angle β1. It is possible to improve the suction / adsorption property and the damage prevention property of the O-ring S, which varies on the side smaller than the standard size.

  Note that FIG. 11 illustrates the case where the angle β1 on the X2 side is larger than the angle β2 on the X1 side, but this explanation is the same even when the angle β1 on the X2 side is smaller than the angle β2 on the X1 side. Shall apply.

  In this case, the adsorbing groove 102d has an outer diameter that is improved while improving its suction / adsorption property and its damage prevention property with respect to the O-ring S whose outer diameter varies to a side larger than the standard size by a relatively small angle β1. The centering property for the O-ring S, which varies in the direction smaller than the standard size, can be improved.

  These effects can also be obtained when the contacts TP5 and TP6 are arranged on the opposing surface.

  Next, a ring-shaped seal suction nozzle 100x, which is another example of the ring-shaped seal suction nozzle 100, will be described with reference to FIG.

  FIG. 12 shows a cross-sectional view of the ring-shaped seal suction nozzle 100x and the O-ring S when the ring-shaped seal suction nozzle 100x sucks and sucks the O-ring S to be sucked, and the facing surface of the facing portion 101x is O. 3 in that it is inclined by an angle δ1 with respect to the reference plane (here, a horizontal plane) of the ring S, and the diameter B1 of the facing portion 101x is smaller than the outer diameter B2 of the O-ring S. Although it is different from the ring-shaped seal suction nozzle 100 shown, it is common in other points.

  With this configuration, the ring-shaped seal suction nozzle 100x projects the center portion of the facing portion 101x in the Z2 direction (inside the ring of the O-ring S), and therefore the centering property with respect to the O-ring S can be further improved.

  Moreover, since the diameter B1 of the opposing part 101x is smaller than the outer diameter B2 of the O-ring S, the ring-shaped seal suction nozzle 100x has a cylindrical O formed on the surface of the workpiece W to which the O-ring S is attached. Even when the diameter of the ring mounting recess W1 is substantially equal to the outer diameter B2 of the O-ring S, the O-ring S is moved to the O-ring S without bringing the side wall of the facing portion 101x into contact with the side wall of the O-ring mounting recess W1. It can be smoothly mounted in the ring-shaped mounting groove W2 formed on the bottom surface of the ring mounting recess W1, and it is not necessary to make the side wall of the O-ring mounting recess W1 into a taper shape that opens to the Z1 side. The assembling property for the ring-shaped mounting groove W2 can be further improved.

  Next, suction grooves 102e to 102g, which are still another example of the suction groove 102, will be described with reference to FIGS. 13 to 15 are diagrams for explaining the cross-sectional shape of the suction groove 102 as in FIGS. 8 to 11, and the cross-section of the O-ring S is not hatched for clarity. Shall be represented.

  In FIG. 13, the suction groove 102e is characterized in that the cross-sectional shape of the opposing surface extending from the contacts TP7 and TP8 is configured by a curve that smoothly continues from the contacts TP7 and TP8. Can be further improved.

  In addition, in FIG. 14, the suction groove 102 f has two line segments including a part of each of two tangents (two tangents at the contacts TP <b> 9 and TP <b> 10) with respect to the cross-sectional circle of the O-ring S. In addition to this, it has a feature in that it further has two line segments (two line segments constituting the bottom surface of the suction groove 102f). With this configuration, the O-ring S is sucked and sucked into the suction groove 102f. It is possible to reduce the volume between the O-ring S and the suction groove 102f and improve the suction / adsorption property.

  In FIG. 15, the suction groove 102g has an angle β3 smaller than the angle β4, and the first level (Z1-Z2) of the first facing surface that forms one end (contact TP11) of the two side walls. (Axial position) is different from the second level (Z1-Z2 axial position) of the second opposing surface forming the other end (contact TP12) of the two side walls. The second facing surface having the second level protrudes into the ring of the O-ring S, so that the centering property with respect to the O-ring S can be improved, and the relatively small angle β3 It is possible to improve the suction / adsorption property and the damage prevention property to the O-ring S whose outer diameter is larger than the standard size.

  Next, referring to FIG. 16, the suction groove 102 having a triangular cross-sectional shape according to an embodiment of the present invention, the suction groove 102 </ b> S having a rectangular cross-sectional shape according to a comparative example, and an arc-shaped cross-sectional shape A difference from the suction groove 102R having the above will be described.

  FIG. 16A is a diagram showing the cross-sectional shape of each of the three suction grooves 102, 102S, and 102R, and each of the three suction grooves 102, 102S, and 102R has a common depth and width for comparison. Suppose that

  FIG. 16B shows a state in which the standard size O-ring S is sucked and sucked into each of the three suction grooves 102, 102S, 102R. The O-ring S has an inner diameter of 1.8 ± 0.1 mm, for example. The maximum outer diameter within the tolerance range is 4.00 mm (maximum inner diameter (1.8 + 0.1 = 1.9 mm) and twice the maximum wire diameter ((1. 0 + 0.05) × 2 = 2.10 mm)), the minimum outer diameter is 3.60 mm (minimum inner diameter (1.8−0.1 = 1.7 mm), twice the minimum wire diameter ((1. 0-0.05) × 2 = 1.90 mm)).

  FIG. 16C shows a state in which the O-ring S having the maximum outer diameter within the tolerance range is sucked and sucked into each of the three suction grooves 102, 102S, and 102R, and FIG. The state shows that the O-ring S having the minimum outer diameter within the tolerance range is sucked and sucked into each of the three suction grooves 102, 102S, and 102R.

  For comparison, FIGS. 16C and 16D show the outline drawn by the triangular suction groove 102 inside the rectangular suction groove 102S and the arc-shaped suction groove 102R with broken lines. And

  As shown in FIG. 16B, when the standard size O-ring S is sucked and sucked by the three suction grooves 102, 102S, and 102R, the sectional shapes of the three suction grooves 102, 102S, and 102R, respectively. And the cross-sectional circle of the O-ring S come into contact with each other at a plurality of contact points, so that the ring-shaped seal suction nozzle can reliably suck and suck the O-ring S.

  On the other hand, as shown in FIG. 16C, when the O-ring S having the maximum outer diameter is sucked and sucked by the three suction grooves 102, 102S, 102R, the three suction grooves 102, 102S, 102R are used. Each of the cross-sectional shapes of the O-ring S and the cross-sectional circle of the O-ring S are in contact with each other only, and the gaps CL1, CL2, and CL3 are formed at different locations. The O-ring S having a diameter is sucked and adsorbed.

  In this case, the clearance CL1 related to the triangular suction groove 102 is smaller than the clearance CL2 related to the rectangular suction groove 102S and the clearance CL3 related to the arc-shaped suction groove 102R, and the suction groove 102 corresponds to the suction groove 102S and suction. The O-ring S can be sucked and sucked more stably than the groove 102R.

  Similarly, as shown in FIG. 16D, when the O-ring S having the minimum outer diameter is sucked and sucked by each of the three suction grooves 102, 102S, 102R, the three suction grooves 102, 102S, Each of the cross-sectional shapes of the 102R and the cross-sectional circle of the O-ring S is in contact with only one contact, and the gaps CL4, CL5, and CL6 are formed at different locations. The O-ring S having an outer diameter is sucked and adsorbed.

  Also in this case, the clearance CL4 related to the triangular suction groove 102 is smaller than the clearance CL5 related to the rectangular suction groove 102S and the clearance CL6 related to the arc-shaped suction groove 102R, and the suction groove 102 includes the suction grooves 102S and 102S. The O-ring S can be sucked and sucked more stably than the suction groove 102R.

  Thus, even when the size of the O-ring S varies within the tolerance range, the triangular suction groove 102 is more stable than the rectangular suction groove 102S and the arc-shaped suction groove 102R. The ring S can be sucked and adsorbed, and its suction and adsorbability can be improved.

  As described above, the ring-shaped sticker suction nozzles 100 and 100x can be used as a core of the O-ring S without using a high-precision O-ring feeder for supplying and arranging the suctioned / sucked O-ring S with high precision. Thus, the O-ring S can be sucked and adsorbed more flexibly and stably.

  In addition, the ring-shaped seal suction nozzles 100 and 100x improve the damage prevention property, centering property, suction / adsorption property, and assembly property of the O-ring S without using other members. It is possible to realize inexpensive and stable suction and suction of the O-ring S without being generated.

  Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications and substitutions can be made to the above-described embodiments without departing from the scope of the present invention. Can be added.

  For example, in the embodiments of FIGS. 8 to 11 and FIGS. 13 to 15, the facing portion 101 of the ring-shaped seal suction nozzle 100 is described as having a width or diameter larger than the outer diameter of the O-ring S. However, the width or diameter may be configured to be smaller than the outer diameter of the O-ring S.

  In addition, the features individually described in each of the embodiments can be introduced in any combination in any other embodiment.

  DESCRIPTION OF SYMBOLS 10 ... General-purpose assembly machine 11 ... Base 12 ... X-axis stage 13 ... Z-axis stage 20 ... O-ring supply machine 21 ... O-ring supply groove 30 ... Conveyor 100, 100x: Ring-shaped seal suction nozzle 101, 101x: Opposing portion 102, 102a to 102g, 102S, 102R ... Adsorption groove 103 ... Opening portion 104 ... Adsorption air flow path 105 ... Main body Part S ... O-ring M ... Assembly member M2 ... Ring-shaped mounting groove M3 ... Conduit W ... Workpiece W1 ... O-ring mounting recess W2 ... Ring-shaped mounting groove W3 ···conduit

JP-A-8-47827

Claims (8)

A ring-shaped seal suction nozzle for sucking a ring-shaped seal,
A facing portion facing the ring-shaped seal to be sucked,
A ring-shaped suction groove corresponding to the shape of the ring-shaped seal formed in the facing portion;
The cross-sectional shape of the suction groove includes two line segments that are tangent to the curve drawn by the cross-sectional shape of the ring-shaped seal.
A ring-shaped seal suction nozzle characterized by that. The width of the suction groove is smaller than the thickness of the ring-shaped seal to be suctioned,
The ring-shaped seal suction nozzle according to claim 1. The suction groove is configured such that two contact points between a cross-sectional shape of the suction groove and a cross-sectional shape of the ring-shaped seal are positioned at two edges of the cross-sectional shape of the suction groove.
The ring-shaped seal suction nozzle according to claim 1 or 2, characterized in that A surface of the facing portion where the suction groove is formed is inclined with respect to a reference surface of the ring-shaped seal;
The ring-shaped seal suction nozzle according to any one of claims 1 to 3. The facing portion is cylindrical, and the diameter of the column is smaller than the outer diameter of the ring-shaped seal.
The ring-shaped seal suction nozzle according to any one of claims 1 to 4. The ring-shaped seal is an O-ring;
The cross-sectional shape of the suction groove includes two line segments that are tangent to a circle defined by the diameter of the O-ring,
The ring-shaped seal suction nozzle according to any one of claims 1 to 5, wherein: The facing portion is subjected to a low friction treatment process,
The ring-shaped seal suction nozzle according to any one of claims 1 to 6. The suction groove communicates with a vacuum device through an opening formed in the suction groove and a suction air flow path, and between two contact points between the cross-sectional shape of the suction groove and the cross-sectional shape of the ring-shaped seal. Configured to be greater than the width of the opening,
The ring-shaped seal suction nozzle according to any one of claims 1 to 7, wherein

Images