JP3080182B2 - Connecting rod front / back discrimination device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for discriminating the front and back of a connecting rod.

[0002]

2. Description of the Related Art In a connecting rod machining process, there is a process for machining a small end hole or a large end hole with reference to a small end side reference plane. It is necessary to send in one of them.

In general, the connecting rod has almost the same shape on both sides except for a special one.
Until now, one of the reference surfaces on the small end side was determined by reading the engraved mark provided on one surface of the large end portion. Difficulty required expensive equipment for reading, and sometimes caused problems such as inability to read.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem.
It is an object of the present invention to provide a new connecting rod front / back discriminating device which pays attention to an oil hole opened on the inner surface of a large end hole and accurately discriminates a reference surface from the position.

[0005]

Means for Solving the Problems] The present invention, as front and back discrimination device of the connecting rod in order to achieve the above object, a positioning member fitted into the small end hole of the connecting rod, is fitted into larger end hole of the connecting rod one providing the fitting member
On the other hand, the position of the oil hole opening in the large end hole of the connecting rod and the detection pin
And a detection means for detecting the state of the detection pin is provided .

[0006]

The connecting rod W is constructed as described above.
When the detection pin is protruded by fitting the fitting member 23 into the large end hole b, if the position of the oil hole opening in the large end hole b matches the tip position of the detection pin, the detection pin Since the protruding rod is protruded, the front and back of the connecting rod W is determined based on the presence or absence of the detection pin, and based on the result of the determination, the connecting rod is discharged laterally into an arc-shaped guide so that the back-facing connecting rod is oriented correctly. Invert and pay out.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 and 2 show a connecting rod front / back discriminating apparatus according to an embodiment of the present invention. In the figure, reference numeral 1
Numerals 0 and 10 denote pillars erected on one side of the conveyor 1. On the upper end of these pillars 10 and 10, a girder 11 suspended in parallel with the conveyor 1 is provided with a discrimination position and a payout position. 1, that is, a main frame 12 reciprocating between a solid line position and a two-dot chain line position in FIG. 1 is mounted so as to be driven and driven by a lateral transfer cylinder 13 fixed to an end of a spar 11. ing.

Reference numeral 14 denotes a lifting cylinder 15 on the main frame 12.
, And a guide cylinder 16 provided on the main frame 12,
A lifting frame that moves up and down by using the lift frame 16 as a guide.
, A supporting frame 19 driven by a turning cylinder 18 on the lifting frame 14 is supported by being suspended so as to be rotatable around a vertical axis.

The support frame 19 has a function of gripping the con rod W which has been conveyed down the conveyor 1 and discriminating the front and back sides thereof, and transferring it to the conveyor 1 again at the payout position. And here, connecting rod W
And a front / back discrimination mechanism 30 are provided. The gripping mechanism 20 for the connecting rod W includes a gripping cylinder 21 erected in the center of the support frame 19 and a chuck claw 22 that is opened and closed by the cylinder 21. The connecting rod W is configured to protrude from the lower surface and hold the connecting rod W stopped at the position of the stopper 3 on the base 2.

A large-diameter fitting member 23 is provided at one end of the lower surface of the support frame 19 so as to fit into the large end hole b of the connecting rod W, and is provided at the other end thereof in a small end hole c of the connecting rod W. The positioning pin 24 having a small diameter to be fitted therein is mounted so as to be constantly driven by the coil spring 25 in the retracting direction and is driven by the engagement cylinder 26 so as to protrude downward from the support frame 19. A fitting member 23 is inserted into the large-diameter hole b of the connecting rod W gripped by 22.
The positioning is performed by fitting a positioning pin 24 into the small diameter portion c.

On the other hand, the above-mentioned front / back discrimination mechanism 30 is disposed inside the fitting member 23. That is, as shown in FIG. 3 and FIG.
A hole 31 extending in the axial direction is provided toward an oil hole d opening in the large diameter hole b, and a spool extending from a first port 32 provided in the support frame 19 is provided at the rear end of the hole 31. A pressurizing air guide hole 33 communicates with this hole 31.
A detection air guide hole 35 is provided in the middle of the support member 19 to pass from the second port 34 provided in the support frame 19 to the other end of the fitting member 23. A detection spool 37 having a distal end serving as a fitting portion 36 into the oil hole d is inserted through the hole 31 in a state where the detection spool 37 is always urged in the retraction direction by a coil spring 38 interposed therein. When the spool 37 moves in the protruding direction, the peripheral surface thereof is
Is closed, and when the detection spool 37 is fitted in the oil hole d, the gripped connecting rod W is oriented in a predetermined direction.
For example, it is configured to determine that it is facing the front.

In FIG. 1, reference numeral 40 designates a regulating cylinder for controlling the feeding of the next connecting rod W at the detecting position and operating a tray 50 described later at the paying-out position. A restricting piece 42 erected at one end and constantly urged upward by a spring 43 is in contact with the end of the rod 41, and when the restricting piece 42 is lowered to the surface of the conveyor 1, the next connecting rod W enters. It is configured to suppress.

Reference numeral 50 in the drawing denotes a tray for receiving the connecting rod W released from the gripping mechanism 20 at the dispensing position. It is displaceably mounted so that it can roll over by the cylinder 52, and when it is tilted forward, the discharged connecting rod W is directly placed on the conveyor 1 via the chute 53, and when it rolls over, it is shown in FIG. The arc-shaped guide 54 is configured to discharge the connecting rod W onto the conveyor 1 while reversing the connecting rod W.

Next, the operation of the apparatus configured as described above will be described. This device is initially located at the determination position indicated by the solid line in FIG.
In addition, the control piece 42 is located on the upper side in the carrying direction and is on standby.

In this state, when the connecting rod W is fed to the position of the stopper 3, the lifting cylinder 15 lowers the support frame 19, and the regulating piece 42 comes into contact with the surface of the conveyor 1, and the next connecting rod W And the fitting member 23 projecting from the lower surface is fitted into the large end hole b of the connecting rod W, and at the same time, the positioning pin 24 is projected downward by the engaging cylinder 26 to engage the small diameter end c of the connecting rod W. Then, the chuck portion 22 is operated by the gripping cylinder 21 to grip the rod portion a of the connecting rod W.

When the fitting member 23 is fitted into the large end hole b of the connecting rod W, the front / back discrimination mechanism 30 then moves
Air is sent from the spool pressing air guide hole 33 to the rear end of the hole 31 to cause the detection spool 37 to protrude. Thus, in the case where the connecting rod W is now fed in a face-up posture with the reference surface facing upward, the detection spool 37 protrudes forward, and the fitting portion 36 is opened on the inner surface of the large end hole b. Fit into oil hole d. For this reason, the detection air guide hole 35 is closed by the detection spool 37 to increase the air pressure, and immediately causes a discrimination circuit (not shown) to determine that the connecting rod W is facing up.

On the other hand, when the connecting rod W is conveyed with its back faced, the axis of the oil hole d does not coincide with the axis of the detecting spool 37.
Since No. 5 is not closed by the spool 37 and the air pressure does not change, the discriminating circuit immediately discriminates that the connecting rod W is in the opposite direction.

When the above discriminating operation is performed, the lifting cylinder 15 raises the support frame 19 holding the connecting rod W as it is, and at the same time, the restriction cylinder 40 projects the restriction piece 42 downward. When the support frame 18 reaches a certain height, the turning cylinder 18 is then moved to the support frame 19.
Is rotated by 180 degrees, and the lateral transfer cylinder 13 causes the rod to contract to move the support frame 19 together with the main frame 12 to the payout position.

When the supporting frame 19 reaches the position immediately above the tray 50 in this manner, the lifting cylinder 15 is then moved to the supporting frame 19.
Is lowered, and first, the regulating piece 42 protruding downward.
Is brought into contact with the tip of the tray 50 as shown by the two-dot chain line in the figure and tilted forward, and the connecting rod W transferred thereon is paid out onto the chute 57, and then the chuck pawl 22 is disengaged. The connecting rod W that has been opened and gripped is discharged onto the tray 50.

In this state, if the connecting rod W is facing backward by the discrimination of the front and back sides, the roll-over cylinder 52 is operated to turn the tray 50 over, and the connecting rod W paid out on the tray 50 is turned over. Is dropped into the arc-shaped guide 54, where it is turned over and transferred onto the conveyor 1. When a series of operations are completed in this way, the current operation is performed in reverse, and the apparatus is returned to the standby position shown by the solid line again.

[0021]

As described above, according to the present invention, the positioning member fitted to the small end hole of the connecting rod and the large end hole are fitted to the positioning member.
The fitting member is provided with an oil hole.
Inspection pins that protrude and retract toward the position and axial direction
The connecting rod by the positioning member and the fitting member.
After positioning and fixing, project the inspection pin from the mating member
The connection rod
Can be automatically determined.

In addition, the connecting rod is laterally paid out to the arc-shaped guide means in accordance with the result of the front / back discrimination, so that the discrimination of the front / back and the subsequent reversal operation to the normal posture are automatically performed. It is possible to perform some kinds of work extremely efficiently.

[Brief description of the drawings]

FIG. 1 is a side view of an apparatus showing one embodiment of the present invention.

FIG. 2 is a front view of the same device.

FIG. 3 is an enlarged side view of a determination mechanism of the device.

FIG. 4 is a bottom view of the mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conveyor 12 Main frame 13 Horizontal transfer cylinder 14 Elevating frame 15 Elevating cylinder 18 Rotating cylinder 19 Support frame 20 Gripping mechanism 22 Chuck claw 23 Fitting member 24 Positioning pin 30 Front / back discrimination mechanism 35 Detection air guide hole 37 Detection Spool 50 Tray 53 Arc guide W Connecting rod b Large end hole d Oil hole

──────────────────────────────────────────────────続 き Continuation of front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G01M 19/00 B23Q 17/00 F16C 7/00 G01M 13/02

Claims (2)

(57) [Claims] 1. A positioning member fitted into a small end hole of a connecting rod and a fitting member fitted into a large end hole of a connecting rod are provided.
On the other hand, the fitting member has an oil hole opening in the large end hole of the connecting rod, and a detection hole that protrudes and retracts in the axial direction.
Provided with a left pin, front and back discrimination device of the connecting rod, characterized in that a detecting means for detecting the emerging state of the detection pin. Wherein providing a dispensing means for paying the co Nro <br/> head sideways according to the detection result of said detecting means when Tomo
The front and back discrimination device of the connecting rod according to claim 1, characterized in that a core support means for co Nroddo inverted downstream side of said transferring means.