JPH0761580B2 - Parts insertion unit - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a component insertion unit used when a component placed at a predetermined component supply position is supplied to a predetermined work position.

[Prior Art] Conventionally, when a component supplied to a predetermined position is supplied to a predetermined work position and is fitted into a prepared hole on a work supplied to the work position, the work is slightly lowered for each work. Due to the different positions of the holes, the fitting shaft of the component and the prepared hole may be eccentrically located. If this amount of eccentricity is large,
The fitting shaft part of the part may not fit well into the pilot hole,
The number of defective parts is increasing. Therefore, a component insertion unit has been devised so that the component can be reliably incorporated into the work even if the fitting shaft of the component and the prepared hole are eccentric. As shown in FIG. 3, the component inserting unit 1 has a unit body 3 attached to a moving member 14 which moves from a component supplying position to a predetermined working position.
The floating plate 5 can be tilted in any direction via an elastic member 15 such as special rubber. A chucking unit 12 that holds a component is fixed to the floating plate 5, and the chucking unit 12 holds the component and holds the component on a work (not shown) on a predetermined position. It is configured to fit in the hole.

In this component insertion unit 1, the chucking unit 12
Even when the center of the fitting shaft of the part held by the and the prepared hole on the workpiece do not match, the part moves in parallel as the part insertion unit 1 descends, and the part is securely fitted into the prepared hole. Can be attached to the workpiece. However, in this component insertion unit 1, since the floating plate 5 is held by the elastic member 15 made of special rubber so as to be horizontally movable, the elastic member 15 is cut when the moving amount of the floating plate 5 increases. Sometimes. Therefore, this component insertion unit 1 cannot be used for a work in which the amount of eccentricity between the component and the work is large and the movement amount of the floating plate 5 is large, and the elastic member 15 is also made of a special rubber material that can withstand repeated use. Therefore, there are drawbacks such as an increase in unit cost.

In view of the above problems, for example, a machine hand as disclosed in Japanese Patent Laid-Open No. 50-94664 has been proposed. This machine hand supports a connecting portion to which fingers for holding parts are connected by a rotatable roller, while providing an advancing / retreating means for advancing / retreating with respect to the connecting portion, and the advancing / retreating means is fitted to the connecting portion. It is configured by providing a fitting portion for

[Problems to be Solved by the Invention] However, a machine hand provided with a fitting portion at the connecting portion in the above-mentioned Japanese Patent Laid-Open No. 50-94664 and provided with advancing and retracting means for fitting into the fitting portion is held by a finger. When fitting the parts to the product, the advancing / retreating means is disengaged from the fitting part to enable the floating plate to operate. There is a problem in that the finger cannot be positioned by fitting the fitting portion and the advancing / retreating means when holding the next component.

SUMMARY OF THE INVENTION The present invention is intended to eliminate the above-described drawbacks, and to move a component horizontally with the insertion of the component even if the fitting shaft of the component and the prepared hole on the workpiece do not coincide with each other. It aims to provide a simple and robust unit.

[Means for Solving the Problems] In order to solve the above problems, a unit body having a built-in cylinder mechanism is fixed to a moving member that moves from a component supply position to a predetermined work position. The unit body is provided with a storage chamber into and out of which the piston rod of the cylinder mechanism comes in and out, and a floating plate having a work shaft to which a predetermined work tool is fixed is arranged in this storage chamber with a sufficient gap around it. Has been done. The upper and lower surfaces of the floating plate are held by balls, and the floating plate is supported by the balls and horizontally movable in the storage chamber.

On the other hand, a fitting hole is provided on the upper surface of the floating plate, and the piston rod is arranged so that the piston rod can be fitted into the fitting hole.

Further, the tip of the piston rod is formed into a conical shape. On the other hand, the floating plate is provided with a plurality of cutout grooves equally dividing its outer edge, and a positioning pin is arranged at a position corresponding to the cutout groove of the floating plate in the unit body. The positioning pin is loosely inserted into the notch groove of the floating plate with a gap, and the gap is set to be equal to or smaller than the radial dimension of the piston rod.

[Operation] In the component insertion unit, the chucking unit holds the component arranged at the supply position and moves it to above the prepared hole on the workpiece supplied to the predetermined work position. After that, the piston rod is positioned at the retracted position, and the component insertion unit descends to insert the fitting shaft portion of the component into the prepared hole. At this time, even if the fitting shaft of the component and the pilot hole are eccentric due to defective work, the component slides along the inclined surface around the pilot hole as the component insertion unit descends, and the component is centered in the pilot hole. Receives the force of moving to the side. At the same time, the floating plate with the working axis to which the chucking unit is attached also receives the force in the same direction, so the floating plate supported by the ball moves in the same direction, and the parts move to match the center of the prepared hole. Then, it can be fitted into the prepared hole.

When the amount of eccentricity between the prepared hole of the workpiece and the fitting shaft of the component is large, the floating plate moves horizontally until the positioning pin comes into contact with the notch groove, but the positioning pin prevents the floating plate from moving further. . Therefore, the fitting hole portion is not completely disengaged from the movement path of the piston rod, and the centering of the floating plate can always be reliably performed.

Embodiments Embodiments will be described below with reference to the drawings. In FIGS. 1 and 2, reference numeral 1 is a component insertion unit, which is attached to a moving member (not shown) arranged so as to be movable from a component supply position to a predetermined work position. The component insertion unit 1 has a unit main body 3 which is moved up and down by the operation of an elevation drive source (not shown). The tip of the unit main body 3 is formed in a conical shape along the center of the unit main body 3. Mechanism 4 having a piston rod 4a extending vertically
Is built in. This cylinder mechanism 4 has an air supply / discharge port 4b.
When air is supplied from the piston rod 4a descends against the spring 4c, and when air is discharged from the air supply / discharge port 4b, the piston rod 4a is configured to retract by the action of the spring 4c. There is. Further, the unit main body 3 is provided with a storage chamber 3a having an open lower end, and the storage shaft 3a is provided in the storage chamber 3a so as to project from the lower surface side thereof and to which a chucking unit 12 as an example of a work tool is attached. The floating plate 5 it has is stored. The floating plate 5 has its upper and lower surfaces clamped by the balls 7 held by the ball retainers 6a, 6b and the flat washers 10a, 10b sandwiching the balls 7, so that the work shaft 5a can move horizontally in the direction in which the force is received. It is arranged.

A notch groove 5b is cut in the floating plate 5 at a position that divides the outer periphery thereof into three equal parts, and one end of a positioning pin 8 fixed to the unit body 3 has a clearance in the notch groove 5b. Has been inserted. The gap between the positioning pin 8 and the cutout groove 5b is set to be equal to or smaller than the radial dimension of the piston rod 4a. Further, the floating plate 5 is provided with a spring receiving portion 5a at a position opposite to each positioning pin 8 with the center thereof sandwiched, and the spring receiving portion 5c is held by the unit main body 3 via a spring retainer 9a. The other ends of the pressed springs 9 arranged are arranged.
Thus, the center of the floating plate 5 is located at the center of the unit body 3.

Further, of the ball retainers 6a, 6b, a lower flat washer for sandwiching the ball 7 held by the lower ball retainer 6b.
10b is urged by a hexagon bolt 11 so as to come into close contact with the floating plate 5 side, and is configured so that the floating plate 5 does not swing.

Further, a fitting hole 5d is formed at the center of the upper portion of the floating plate 5, and the tip of the piston rod 4a of the cylinder mechanism 4 is fitted into the fitting hole 5d. The floating plate 5 is centered.

In the above component insertion unit, air is supplied from the air supply / discharge port 4b of the cylinder mechanism 4, the piston rod 4a is positioned in the fitting hole 5d of the floating plate 5, and the floating plate 5 is centered. The moving member moves above the component supply device, the component insertion unit 1 descends, and the chucking unit 12 holds the component 2. When the moving member moves above the predetermined work position, air is discharged from the air supply / discharge port 4b of the cylinder mechanism 4, and the piston rod
4a retracts and the floating plate 5 is in a free state in which it is biased toward the center by the pressing spring 9. In this state, when the raising / lowering drive source operates and the unit main body 3 descends, the component 2 is inserted into the prepared hole 13a on the work 13 arranged at the predetermined working position. At this time, even if the fitting shaft portion 2a of the component 2 and the prepared hole 13a are eccentrically positioned, the tip of the fitting shaft portion 2a of the component 2 is inclined around the prepared hole 13a as the component 2 descends. It receives a force in a direction of sliding along the surface and moving toward the center of the prepared hole 13a. Therefore, the chucking unit 12 for chucking the component 2 and the work shaft 5a integrated with the chucking unit 12 are provided.
At the same time, the floating plate 5 receives a force in the circumferential direction, and the floating plate 5 is supported by the balls 7 and horizontally moves in the same direction. Therefore, the fitting shaft portion 2a of the component 2
And the prepared hole 13a of the work 13 are located concentrically with each other, and the component 2 is securely attached to the work 13. Also, at this time, the work
When the amount of eccentricity between the prepared hole 13a of 13 and the fitting shaft portion 2a of the component 2 is large, the floating plate 5 moves horizontally until the positioning pin 8 comes into contact with the notch groove 5b. Movement is restrained. Therefore, the fitting hole 5d is not completely disengaged from the moving path of the piston rod 4a, and the floating plate 5 can always be reliably centered.

In the embodiment, the piston lot 4a is used for centering the chucking unit 12. However, a friction plate (not shown) is attached to the tip of the piston rod 4a so that it abuts the floating plate 5. With this configuration, the floating plate 5 can be fixed at any position by the friction plate, and the eccentric position of the chucking unit 12 can be arbitrarily selected.

EFFECTS OF THE INVENTION As described above, according to the present invention, the floating plate to which the work tool is integrally fixed is supported by the balls in the unit body so as to be movable in the horizontal direction, and at the center of the floating plate. A fitting hole is provided, and a cylinder mechanism with a piston rod that can be fitted in this fitting hole is provided, while a cutout groove is provided in the floating plate, and a positioning pin is placed in the storage chamber corresponding to this cutout groove. However, since the positioning pin is loosely inserted in the cutout groove with a gap, when the eccentricity between the component and the product is large, the floating plate comes into contact with the positioning pin to move the floating plate in the horizontal direction. The amount can be limited, which allows the piston rod and the fitting hole to accompany the excessive movement of the floating plate. Since there is no deviation from the above, there is an advantage that the positioning of the floating plate can be performed reliably and the component insertion work can be performed accurately.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an essential part of the present invention, and FIG. 2 is A of FIG.
FIG. 3 is a main part sectional view taken along the line A, and FIG. 3 is a main part explanatory view of a conventional example. 1 ... parts insertion unit, 2 ... parts, 2a ... fitting shaft part, 3 ... unit body, 3a ... storage chamber, 4 ... cylinder mechanism, 4a ... piston rod, 4b ... air supply / discharge Mouth, 4c ... Spring, 5 ... Floating plate, 5a ... Working shaft, 5b ... Notched groove, 5c ... Spring receiving part, 5d ... Mating hole part, 6a, 6b ... Ball retainer, 7 ... … Ball, 8 …… Positioning pin, 9 …… Pressing spring, 9a …… Spring retainer, 10a, 10b …… Flat washer, 11 …… Hexagon bolt, 12 …… Chucking unit, 13 …… Workpiece, 13a …… Pilot hole, 14 ... Moving member, 15 ... Elastic member,

Claims (1)

[Claims] 1. A unit main body having a built-in cylinder mechanism is fixed to a moving member that moves from a component supply position to a predetermined work position, and a storage chamber for allowing a piston rod of the cylinder mechanism to move in and out is provided in the unit main body. A floating plate having a work shaft to which a predetermined work tool is fixed is arranged, and while the upper and lower surfaces of the floating plate are held by balls, a fitting hole portion is provided on the upper surface of the floating plate, and the fitting hole portion is provided with the fitting hole portion. In the component insertion unit in which the piston rod is positioned so that it can be fitted, the tip of the piston rod is formed into a conical shape, and the outer edge of the floating plate is equally divided to provide a plurality of notch grooves, Place the positioning pin at the position corresponding to the notch in the floating plate. A component insertion unit characterized in that one end of a positioning pin is loosely inserted into a notch groove of a floating plate with a gap, and the gap is set to a radius dimension of a piston rod or less.