JP2660750B2 - Conveyed object positioning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a transported object which positions an incoming transported object at a fixed position, and then releases the positioning to restart the transport of the transported object. The present invention relates to an object positioning device.

(Prior Art and Problems Thereof) In this type of conventional transported object positioning device, the engaging portion of the transported object is clamped at a fixed position by a pair of front and rear clamp arms.

In such a conventional transferred object positioning device,
Safety measures have not been taken for a case where the transported object entering at a high speed does not stop within the allowable range or for runaway, and there has been a drawback that the device may be damaged when such a situation occurs. Further, depending on the stop position of the transferred object, the transferred object may be moved backward by the clamp arm. Therefore, the clamp arm cannot be operated unless the transferred object is completely stopped. However, there is also a disadvantage that the cycle time becomes longer.

(Means for Solving the Problems) An object of the present invention is to provide a conveyed object positioning device capable of solving the above-mentioned conventional problems, and the means is provided in an embodiment described later. The movable table 1 is slidably moved from the stop position of the transferred object engaging portion 7 to the guide rail 2 disposed along the unloading direction.
And the movable table 1 is fixed to the starting end position of the moving path by a coupling means (for example, a shear pin 12) which is released when a predetermined or more external force is applied. A stopper 6 movable between a stop position for receiving the transferred object engaging portion 7 and a retracted position allowing the transferred object engaging portion 7 to pass therethrough;
Is provided over the entire moving path of the movable base 1 and the cam 13 is retracted at least from the stopper 6 when the movable base 1 is fixed at the starting end position of the moving path. A cam position switching means (for example, a cylinder 17) for switching to a non-operating position for moving to the position, and further, the transferred object is moved between the stopper 6 on the movable base 1 fixed at the start position of the movement path. A movable holding piece 18 that is reciprocally movable between a forward limit position for positioning with the engaging portion 7 interposed therebetween and a retreat limit position on the upper side of the transferred object engaging portion stop position;
And a driving means (for example, a cylinder 25) for reciprocating the movable object. It is configured to be urged to an upright posture for pushing the joint 7.

In carrying out the present invention, for example, the cam
Reference numeral 13 denotes an inclined cam portion 13a which is reciprocally movable along the moving path of the movable base, and has a rear end portion which allows the stopper 6 to move to the retracted position when the cam 13 is moved forward by a predetermined stroke. And the cam 13 can be moved back and forth by the cam position switching means.

Further, when the movable holding piece 18 is at the retreat limit position,
A cam 26 for forcibly switching the movable holding piece 18 to the lying posture.
Can be arranged.

(Operation of the Invention) If the incoming transferred object engaging portion 7 passes through the position of the movable holding piece 18 waiting at the retreat limit position toward the stopper 6 and stops, the movable holding portion 7 is stopped. The piece 18 is moved forward by the driving means (cylinder 25), and the transferred object engaging portion 7 stopped in front of the stopper 6 is pushed and moved by the movable holding piece 18 so as to be held between the stopper 6 and the stopper 6. And can be positioned. The start of the forward movement of the movable holding piece 18 may be performed after the transferred object engaging portion 7 has passed through the position of the movable holding piece 18, and the transferred object engaging portion 7 is completely stopped. No need to wait. Moreover, the transferred object engaging portion 7 is pressed by the movable holding piece 18 against the stopper 6 fixed at a fixed position via the movable base 1 to position the transferred object engaging portion 7, so that Immediately after the transferred object engaging portion 7 has passed the position of the movable holding piece 18, the movable holding piece 18 is moved forward to shorten the cycle time.

To start the positioned conveyed object, the cam 13 holding the stopper 6 at the stop position is switched to the non-operation position by the cam position switching means (cylinder 17), and the stopper 6 is moved to the retracted position to move the conveyed object. Conveyance engagement part 7
I just need to release the restriction.

If the transported object runs away and the engaging portion 7 collides with the stopper 6 with excessive force, the movable table 1 is released from the fixed state by the connecting means (shear pin 12).
Becomes movable, the stopper 6 is pushed together with the movable table 1 by the transferred object engaging portion 7 and slides on the guide rail 2 to transfer the runaway energy of the transferred object to the coupling means. It is absorbed by the disengagement of the (shear pin 12) and the sliding movement of the movable base 1, and the transported object can be safely and securely stopped before the movable base 1 reaches the end of its movement path. Needless to say, the stopper 6 is held at the stop position by the cam even while the movable table 1 is slidably moved.
The transported object engaging portion 7 can be continuously received.

(Embodiment) An embodiment of the present invention will be described below with reference to the accompanying drawings.

1 to 3, reference numeral 1 denotes a movable platform, 2 denotes a pair of left and right flat guide rails laid along a carrying-out direction from a stop position of a transferred object engaging portion 7, and 3 denotes a flat guide rail on the flat guide rail 2. And a pair of left and right positioning / holding rails attached to the bracket. The movable table 1 has both left and right sides sandwiched between the flat guide rail 2 and the positioning / holding rail 3, and is supported so as to be slidable in the transport direction of the transported object. The positioning / holding rail 3 includes a disc spring 4 capable of adjusting an initial compression force (see FIG. 2).
The left and right sides of the movable table 1 are pressed onto the surface of the flat guide rail 2 by the compression reaction force of the above, and an external force that overcomes this pressing force acts on the movable table 1 in the longitudinal direction of the flat guide rail 2. Thereby, the movable table 1 can move while being guided by the positioning / holding rail 3.

A stopper 6 is supported on the movable table 1 by a horizontal support shaft 5 so as to be vertically swingable. An elastic cushioning member 8 for receiving the transferred object engaging portion 7 and a hydraulic damper 9 projecting rearward from the elastic cushioning member 8 are attached above the free end of the stopper 6. A cam follower (roller) 10 is provided below the end. Note that the movable base 1 is provided with a notch 11 that allows the stopper 6 to swing downward.

The movable table 1 is fixed to the flat guide rail 2 by a connecting means using a shear pin 12 at a start end position of a reciprocating movement path on the flat guide rail 2.

13 is a cam follower (roller) 10 of the stopper 6
And a pair of left and right angle members 2a supporting the flat guide rails 2 and a pair of left and right guide rails 14 below the cam members. The movable table 1 is supported so as to be reciprocally movable in the moving direction of the movable table 1 by a supporting horizontal axis roller 15 fitted between the movable table 1 and a steady-state vertical axis roller 16 fitted between the guide rails 14. . Reference numeral 17 denotes a cylinder as a cam position switching means for reciprocating the cam 13. When the cylinder 13 moves the cam 13 forward by a predetermined stroke, an inclined cam portion 13a for allowing the stopper 6 to swing downward is provided with a cam. It is connected to 13 tips.

Numeral 18 denotes a movable holding piece, which is supported by a horizontal support shaft 20 on a trolley 19 which can reciprocate in the same direction as the moving table 1 so as to be vertically swingable.
A roller 21 rolling on 2a is axially supported, and is urged by a torsion coil spring 22 (see FIG. 3) in a rising direction in which the roller 21 is pressed against the angle member 2a. The trolley 19 is movably supported on the guide rail 14 by a supporting horizontal axis roller 23 and a steadying vertical axis roller 24, like the cam 13, and is reciprocated by a cylinder 25 as a driving means. . Reference numeral 26 denotes a cam for switching the position of the movable holding piece, and when the trolley 19 is at the retreat limit position as shown in FIG. Switch to posture.

As shown in FIG. 1, in a state where the trolley 19 is at the retreat limit position and the movable holding piece 18 is switched to the lying posture by the cam 26, the transferred object engaging portion 7 Trolley 19 by cylinder 25
When the roller 21 is moved forward, the movable holding piece 18 is switched to the upright posture by the biasing force of the torsion coil spring 22 with the transfer of the roller 21 from the cam 26 to the angle member 2a (see the phantom line in FIG. 4). 4) As the trolley 19 moves forward, the movable holding piece 18 in the upright posture pushes the transferred object engaging portion 7 as shown in FIG. Then, by pressing the engaging portion 7 against the elastic cushioning member 8 of the stopper 6 received at the stopping position by the cam 13, the position of the transferred object can be stopped.

If the transferred object engaging portion 7 does not stop before coming into contact with the stopper 6, the engaging portion 7 collides with the hydraulic damper 9 of the stopper 6 and the impact force is absorbed by the hydraulic damper 9. Later, by contacting the elastic cushioning material 8, the impact when received by the stopper 6 is favorably reduced.

When the positioned conveyed object is started again, the cam 13 is moved forward by a predetermined stroke by the cylinder 17, and the inclined cam portion 13a of the cam 13 is moved by the cam follower (roller) of the stopper 6 as shown in FIG. By moving the stopper 6 directly below the stopper 10, the stopper 6 swings downward around the horizontal support shaft 5 by its own weight, and switches from the restrained position to the retracted position. In this state, the transferred object engaging portion 7 can be moved forward without being hindered by the stopper 6.

In order to receive the next transported object, the cam 13 is retracted and returned to the original position by the cylinder 17 and the inclined cam 13
The stopper 6 is moved upward by a to return to the stopping position, and the trolley 19 is moved backward to the original position by the cylinder 25, and the movable holding piece 18 is returned to the standby position, and at the same time, is switched to the lying posture by the cam 26. It is good.

If the transferred object runs away and collides with the stopper 6 with an abnormal impact, the impact causes
Is sheared to release the fixation of the movable base 1, so that the stopper 6 and the movable base 1 are pushed by the transferred object engaging portion 7 and start to move forward integrally, but the runaway energy of the transferred object is First, it is consumed for the shearing of the shear pin 12 and then consumed for the movable table 1 to be pushed and pushed against the frictional force between the flat guide rail 2 and the positioning / holding rail 3. As shown by the virtual line, the runaway of the transferred object can be stopped before the movable table 1 reaches the end of the movement path. Of course, when the movable base 1 moves forward integrally with the engaging portion 7 of the transferred object, the cam follower (roller) 10 of the stopper 6 rolls on the cam 13 so that the stopper 6 is It is held at a stop position for receiving the engaging portion 7 of the transported object.

(Effects of the Invention) As described above, according to the transferred object positioning device of the present invention, the transferred object can be pinched and positioned between the movable holding piece and the stopper. Since the positioning operation by the movable holding piece can be started without waiting for the stoppage, the cycle time required for positioning the transported object can be reduced. In addition, at this time, there is no danger that the object to be conveyed is pressed and moved in the opposite direction as in the related art, so that smooth and reasonable positioning can be performed.

Also, even if a stoppage or runaway of the transferred object causes a collision with the stopper with an abnormal impact, the coupling means for coupling the movable base supporting the stopper and the guide rail is released. The runaway energy is absorbed by the sliding movement of the movable table, and the transported object can be safely and securely stopped without causing damage to each part of the apparatus.

In order to move the stopper 6 to the retreat position at least when the movable base 1 is fixed at the start position of the movement path, the entire cam 13 can be moved up and down in parallel, and the cam position such as a cylinder is switched. The cam 13 may be lowered by means, or the cam 13 may be supported so as to be able to swing up and down with the front end of the cam 13 as a fulcrum, and the cam 13 may be moved by a cam position switching means such as a cylinder. You may incline downward so that it may fall. That is, it is necessary to move the stopper 6 to the retracted position with the cam 13.
The transferred object engaging portion 7 is formed by the stopper 6 and the movable holding piece 18.
Is at the time of unloading the transferred object after the positioning is stopped at a predetermined position, if at least the stopper 6 can be moved to the retreat position when the movable table 1 is fixed at the start position of the moving path. It is good.

However, as in the above embodiment, the cam 13 is reciprocally movable along the movement path of the movable table, and the rear end of the cam 13 is retracted when the cam 13 is moved forward by a predetermined stroke. When the cam position switching means is configured to move the cam 13 back and forth, the height of the entire apparatus including the cam position switching means is increased by continuously connecting the inclined cam portion 13a which allows the movement to the position. Can be configured low.

In addition, the movable holding piece 18 is undulating and allows the object to be conveyed 7 to fall from the rear and allows the passage of the object to be conveyed from behind, and is biased to a standing posture for pushing the object to be conveyed 7. Therefore, the transferred object engaging portion 7 applies the urging means (the torsion coil) to the movable holding piece 18 in the upright posture without forcibly switching to the falling posture by the cam 26 when in the retreat limit position. It can pass while falling down against the urging force of the spring 22), and after passing, the movable holding piece 18 can automatically return to the upright posture for boosting by the urging force.

However, as in the above embodiment, the movable holding piece 18
When is in the retreat limit position, by disposing a cam 26 for forcibly switching the movable holding piece 18 to the lying posture,
Wear and noise due to useless collision between the transferred object engaging portion 7 and the movable holding piece 18 can be avoided.

[Brief description of the drawings]

FIG. 1 is a partially longitudinal side view showing a state before positioning of a transferred object, FIG. 2 is a longitudinal rear view at a stopper position, FIG. 3 is a longitudinal rear view at a position of a movable holding piece, and FIG. FIG. 5 is a partial longitudinal side view of a main part in a state where the transferred object is positioned, and FIG. 5 is a partial vertical side view of the main part showing a state when the positioned transferred object is started. DESCRIPTION OF SYMBOLS 1 ... Movable stand, 2 ... Flat guide rail, 3 ... Positioning and holding rail, 6 ... Stopper, 7 ... Engagement part of transferred object, 8 ... Elastic cushioning material, 9 ... Hydraulic damper, 10: cam follower (roller), 12: shear pin (coupling means), 13, 26: cam, 17: cylinder (cam position switching means), 18: movable holding piece, 19: trolley, 21 …… Roller, 22 …… Torsion coil spring,
25 ... Cylinder (drive means), 26 ... Cam.

Claims (3)

(57) [Claims] The movable table is slidably supported on a guide rail disposed along the unloading direction from a stop position of the transferred object engaging portion, and the movable table is moved to a start end position of a moving path thereof. The movable table is fixed by a coupling means that is disengaged when it receives an external force of a predetermined value or more, and a stop position for receiving the transferred object engaging portion and the passing of the transferred object engaging portion are allowed on the movable table. A stopper that can move between the retracted position is provided, and a cam that holds the stopper at the stop position is disposed over the entire moving path of the movable base, and the cam is moved at least to the moving path start end position. Cam position switching means for switching the stopper to a non-operating position for moving the stopper to the retracted position when fixed, and further comprising the stopper on the movable base fixed to the movement path start end position A movable holding piece that is reciprocally movable between a forward limit position for positioning the transferred object engaging portion therebetween and a retreat limit position on the upper side of the transferred object engaging portion stop position. Driving means for reciprocating the movable holding piece is provided. The transported object positioning device which is urged to the standing posture. 2. The cam is reciprocally movable along a moving path of the movable table, and has a rear end provided with a movement of the stopper to a retracted position when the cam is moved forward by a predetermined stroke. The transferred object positioning device according to claim 1, wherein an inclined cam portion for allowing is continuously provided, and the cam position switching means moves the cam back and forth. 3. When the movable holding piece is at a retreat limit position,
The transported object positioning device according to claim 1 or 2, further comprising a cam for forcibly switching the movable holding piece to the lying posture.