JP4215698B2 - Automatic loading device for annular workpiece - Google Patents

Description

  The present invention relates to an automatic loading device that automatically separates an annular workpiece such as a C-shaped clip one by one and loads the separated annular workpiece onto a mounting jig.

  In order to prevent the piston pin attached to the piston from falling off, a C-shaped clip is fitted into the annular groove in the hole where the piston pin is mounted. An apparatus proposed in Patent Document 1 as an apparatus for automatically performing the fitting operation of the C-shaped clip includes an extrusion cylinder, a positioning cylinder, and an insertion cylinder, and each of the C-shaped clips held in the holder is extruded one by one. The cylindrical member is pushed obliquely in a state of being reduced in diameter in the cylindrical member, and then the cylindrical member is lowered by the positioning cylinder and brought into contact with the piston, and the clip is engaged in the annular groove by the fitting cylinder. .

Further, in Patent Document 2, the receiving shaft is inserted into the insertion hole of the piston pin, and the clip is held by the clip catcher, and the clip catcher and the pusher are brought close to the piston and held by the clip catcher. There has been proposed a mounting jig that is inclined to the receiving shaft, passed through, and pushed into the clip with a pusher.
JP-A-9-225754 JP 7-68432 A

According to the device disclosed in Patent Document 1, everything from the cutting of the C-shaped clip to the mounting to the piston pin hole is automated, but the device becomes large and the response when changing the model becomes troublesome.
In particular, the attachment of the C-shaped clip to the piston pin hole may require a delicate force adjustment, and malfunctions are likely to occur if all are automated.

  Therefore, it has been practiced that a C-shaped clip is loaded into a mounting jig as disclosed in Patent Document 2 and the C-shaped clip is securely attached one by one by an operator's manual work. There is a problem that it takes time to load the mounting jig.

  That is, it is most preferable to manually insert the C-shaped clip into the annular groove of the piston pin hole by hand using a dedicated mounting jig. However, the mounting of the C-shaped clip into the mounting jig is particularly sensitive. Since adjustment is not required, it is desired to automate as much as possible, but no technology that satisfies such a request has been realized.

In order to solve the above-mentioned problems, the present invention provides an automatic loading device for an annular workpiece, a cutting device for separating a large number of annular workpieces one by one, and a setting device for loading an annular workpiece cut out from the cutting device into a mounting jig. Further, the set device includes a mounting table that reciprocates linearly toward the cutting device, and the mounting jig is detachably mounted on the mounting table.
By setting it as the said structure, a cyclic | annular workpiece | work is automatically mounted to a mounting jig only by an operator putting a mounting jig on the mounting base of a setting apparatus.

  In addition, as an example of a specific configuration of the cutting device, a guide rod in which a large number of annular workpieces are slidably held on an outer peripheral portion, and an annular workpiece held on the guide rod by its up-and-down movement are the most. A configuration including a separation plate that separates the annular work at the tip from the subsequent annular work is conceivable.

  According to the present invention, it is possible to automatically perform an operation of separating a plurality of annular workpieces such as C-shaped clips one by one from a stacked or connected state, and an operation of loading the separated annular workpieces into a mounting jig.

  Therefore, taking the C-shaped clip in the annular groove of the mounting hole of the piston ring as an example, the C-shaped clip using a mounting jig that requires delicate force adjustment or fine angle adjustment is inserted. The work is done manually, while the simple C-shaped clip cutting operation and the loading operation to the mounting jig that do not require delicate force adjustment or fine angle adjustment can be performed automatically. Is greatly improved.

  Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a front view of an annular workpiece automatic loading apparatus according to the present invention, showing a state in which the mounting jig is retracted, and FIG. 2 shows a state in which the mounting jig is moving forward. In the embodiment, a retaining C-shaped clip that fits into the piston pin mounting hole as an annular workpiece will be described.

  The automatic workpiece loading device according to the present invention comprises a cutting device S1 for separating a large number of circular workpieces one by one, and a setting device S2 for loading the annular workpiece cut out from the cutting device into a mounting jig. The

  The cutting device S1 is provided with a rail 2 on a base 1 horizontally, a guide rod 3 made of a pipe material is disposed above the rail 2 in parallel with the rail 2, and a moving body 4 is further provided on the rail 2. An upright piece 5 extending upward is attached to the moving body 4. Further, a constant load spring 7 is provided between the movable body 4 and the support plate 6 attached to the base 1, and the movable body 4 is urged to the right side in the drawing with a constant force.

  A guide plate 8 having a V-shape is attached to the tip of the support plate 6 as shown in FIG. 3 as viewed in the direction of arrow A in FIG. 1, and a C-shaped clip mounting jig is attached to the guide plate 8. By placing 100 guide shaft portions 102, center alignment can be performed.

  On the other hand, the front end portion (right end in FIG. 1) of the guide rod 3 penetrates the separation plate 9, and a ring member 10 is slidably mounted on the outer periphery of the guide rod 3. The upright piece 5 of the moving body 4 is in contact with the (left end). As a result, the urging force of the constant load spring 7 is applied to the C-shaped clip W group via the movable body 4 and the ring member 10, and the C-shaped clip W group is urged to the right side in the figure, and the leading end located at the rightmost end. The C-shaped clip W contacts the separation plate 9 with a constant load.

  The separating plate 9 is attached to a bifurcated connecting portion 12 of a cylinder unit 11 fixed to the base 1 by a bolt 13 so that the position thereof can be adjusted, and is reciprocated in the vertical direction by driving the cylinder unit 11.

  As shown in FIGS. 4 to 6, the shape of the separation plate 9 is a rectangular shape in a front view, and an elliptical (oval) opening 14 is formed in the central portion. It is set larger than the outer diameter of the guide rod 3 and smaller than the outer diameter of the C-shaped clip W. The shape of the opening 14 is not limited to an ellipse (oval), and may be a shape opened upward or downward, and may be any shape as long as the left and right side surfaces are parallel.

  Further, a step portion 15 and a wedge portion 16 are formed on the left and right side surfaces that form a straight line in the inner peripheral surface of the opening portion 14. The distance t2 between the outer ends in the width direction of the left and right step portions 15, 15 is set to be larger than the outer diameter of the C-shaped clip W. Similarly, the interval between the outer edges in the width direction of the left and right wedge portions 16, 16 is the same interval t2.

  Further, as shown in FIG. 5, the thickness t3 of the stepped portion 15 is such that the leading end (lower end) of the wedge portion 16 is next to the leading C-shaped clip W with the leading C-shaped clip W in contact with the stepped portion 15. It is set to a dimension located between the C-shaped clip W.

  On the other hand, in the setting device S2 for loading the C-shaped clip W onto the mounting jig 100, a rail 22 is horizontally provided on the base 21, and a mounting table 23 for mounting and fixing the mounting jig 100 is engaged with the rail 22. The mounting unit 23 is moved forward and backward with respect to the cutting device S1 by the operation of the cylinder unit 24.

  The mounting jig 100 holds a part of the C-shaped clip W between the grip part 101 made of a pipe material, a guide shaft part 102 that is replaceably attached to the tip of the grip part 101, and the guide shaft part 102. The clamp member 103 and the lever 104 for opening and closing the clamp member 103 are main components.

In the above, from the state where the mounting jig 100 is retracted as shown in FIG. 1 to the loading of the C-shaped clip W will be described.
First, FIG. 7A shows a state where the rightmost C-shaped clip W of the C-shaped clip W group abuts against the step portion 15 of the separating plate 9 and is stopped by the urging force of the constant load spring 7. . When the separation plate 9 is lowered by the operation of the cylinder unit 11 from this state, the wedge portion 16 is interposed between the rightmost C-shaped clip W and the next C-shaped clip W as shown in FIG. Interruption, the uppermost part of the rightmost C-shaped clip W is separated so that it falls to the right side. When the separating plate 9 is further lowered, the rightmostmost C-shaped clip W is completely separated as shown in FIG. The

  From this state, as shown in FIG. 2, the cylinder unit 24 is driven to advance the mounting table 23 toward the cutting device S1. This forward movement is guided by the guide plate 8, and the guide shaft portion 102 at the tip of the mounting jig 100 is inserted into the inner hole of the guide rod 3.

  When the guide shaft portion 102 of the mounting jig 100 is inserted into the inner hole of the guide rod 3, the clamp member 103 biased in the closing direction (contact direction) by a spring or the like on the upper surface of the guide shaft portion 102. It hits the C-shaped clip W whose tip is cut out. When the mounting jig 100 further advances, as shown in FIG. 7 (d), the clamp member 103 is slightly rotated against the spring to get over the C-shaped clip W and the guide shaft portion 102 and the clamp member 103. Hold between. In this state, the C-shaped clip W is loaded into the mounting jig 100, and the preparation for fitting the next C-shaped clip is completed.

  A procedure for attaching the C-shaped clip to the annular groove of the piston mounting hole using the mounting jig 100 in which the C-shaped clip W is set will be described with reference to FIG. First, the shaft 101 is inserted into the piston pin mounting hole 105 of the piston while being held between the guide shaft 102 and the guide shaft 102 so that the lower end of the C-shaped clip W is forward at the tip of the clamp member 103.

  Then, the lower end portion of the C-shaped clip W is first fitted into the annular groove 106. Then, when the lever 104 is released to release the holding state by the clamp member 103 and the shaft portion 101 is further advanced, the remaining portion of the C-shaped clip W is pushed into the annular groove 106.

  The automatic workpiece loading device according to the present invention can be used in a process of mounting a C-shaped clip in an annular groove of a piston pin mounting hole.

The front view which shows the state which the mounting jig of the automatic loading apparatus of the cyclic | annular workpiece | work concerning this invention has retracted. The front view which shows the state which the mounting jig of the automatic loading apparatus of the cyclic | annular workpiece | work concerning this invention advances. Enlarged side view seen from direction A in FIG. Front view of the separation plate that forms part of the cutting device BB sectional view of FIG. Rear view of separation plate that forms part of cutting device (A)-(d) is the figure explaining the effect | action of the cutting-out apparatus. The figure explaining the action of the mounting jig of the C-shaped clip as an annular work

Explanation of symbols

DESCRIPTION OF SYMBOLS S1 ... Cutting-out apparatus S2 ... Setting apparatus 1 ... Base 2 ... Rail 3 ... Guide rod 4 ... Moving body 5 ... Standing piece 6 ... Supporting plate 7 ... Constant load spring 8 ... Guide plate 9 ... Separation plate 10 ... Ring member 11 ... Cylinder Unit 12 ... Bifurcated connecting part 13 ... Bolt 14 ... Opening part 15 ... Step part 16 ... Wedge part 100 ... Mounting jig 101 ... Grip part 102 ... Shaft part 103 ... Clamp member 104 ... Lever 105 ... Piston pin mounting hole 106 ... Annular groove t1 Width dimension of the opening t2 Space between outer ends in the width direction of the right and left step portions t3 Thickness of the step portion W C-shaped clip

Claims (1)

An automatic loading device for an annular workpiece comprising a cutting device for separating a large number of annular workpieces one by one and a setting device for loading the annular workpiece cut out from the cutting device into a mounting jig, the cutting device comprising: A guide rod made of a pipe material on which a large number of annular workpieces are slidably held on the outer peripheral portion, and the most advanced annular workpiece among the annular workpieces held by the guide rod by its vertical movement is separated from the subsequent annular workpiece. The set device includes a mounting table that reciprocates linearly toward the cutting device, and the mounting jig is detachably attached to the mounting table, and the mounting jig is in a forward position. And a replaceable guide shaft portion to be inserted into the inner hole of the guide rod, and a clamp member for holding a part of the annular workpiece between the guide shaft portion. Autoloader annular workpiece characterized by Rukoto.