JPH0664744A - Multifunctional conveyed unit stopping device - Google Patents

Abstract

PURPOSE:To operate functions associated by putting together compactly into single action the functions of quick stop, shock absorption, high accurate positioning and quick delivery of a conveying pallet. CONSTITUTION:A stopper 21 is stopped to the front end surface of a conveying pallet, to softly stop the pallet while absorbing a shock at stopping time by a shock absorber 31. By stopping an antiback pawl 41 to a recessed part provided in a bottom surface of the pallet, springing back from the stopper 21 is prevented to quickly stop the pallet. After stopping, the pallet 1 is positioned by the stopper 21 and the antiback pawl 41. When link plates 61, 62 are pulled down by an air cylinder 71, a movable arm 51 is rotated to release the stopper 21 from the pallet 1, simultaneously protruding the pallet 1 by rotating the antiback pawl 41, to quickly feed out the pallet 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multifunctional device for stopping a conveyed object. More specifically, the present invention is a multifunctional transfer target stopping device capable of rapidly stopping, positioning and further rapidly transferring a transfer target such as a transfer pallet or a container in a conveyor line while absorbing impact. Regarding

[0002]

2. Description of the Related Art In various conveyor lines, a transfer pallet carrying works of different sizes and weights is transferred at various speeds from low speed to high speed. At the work station, the transfer pallet is restrained and stopped. The operation of assembling the work on the pallet, supplying the parts to the work, and the like are performed, and when the predetermined operation processing is completed, the constraint of the transfer pallet is immediately released and the transfer pallet is sent out.

The simplest way to restrain a transport pallet on a conveyor line and stop it at a work station is to hook a stopper onto the front end face of the transport pallet.

However, when it is attempted to quickly stop the transfer pallet that is being transferred at high speed with the stopper while the conveyor is still moving, the transfer pallet bounces from the stopper due to the repulsive force at the time of collision, and the transfer pallet bounces back. Sent by and collide with the stopper again and bounce off. Therefore, the transport pallet reciprocates many times before stopping, and loss time occurs until it completely stops, and the work on the transport pallet may be displaced or the work may be damaged. . on the other hand,
Even when the stopper is released from the transfer pallet, the transfer pallet is placed on the conveyor line and sent out from the work station, there is a time lag from the release of the stopper until the transfer pallet reaches the same transfer speed as the conveyor. Therefore, the residence time of the transfer pallet at the work station becomes longer than necessary, and the work efficiency is reduced.

For this reason, a pallet stopping device capable of stopping the transport pallet quickly while absorbing the impact at the time of collision of the transport pallet with the stopper, and positioning the transport pallet in cooperation with the stopper and promptly transport pallet. A pallet feeding device capable of feeding the pallets has been developed. FIG. 8 is a plan view showing a conventional pallet stopping device 101 and a conventional pallet feeding device 111, and FIG. 9 is a schematic side view for explaining the operation thereof.

In this conveyor line, conveyors 121 are laid along both sides of the transfer path, and the transfer pallet 122 is transferred in the pallet transfer direction V by the conveyor 121. The pallet stop device 101 and the pallet delivery device 111 are separate devices, the pallet stop device 101 is installed in front of a work station that stops the transport pallet 122, and the pallet delivery device 111 is installed in the rear of the work station. Has been done.

As shown in FIG. 9, the pallet stopping device 101 includes an air cylinder 102, a base 103 that moves up and down by driving the air cylinder 102, and a stopper 105 pivotally supported by a shaft 104 on the base 103. , A shock absorber 106 that elastically pushes up the stopper 105 to incline the upper end portion of the stopper 105 rearward, and the normal stopper 105 is the shock absorber 10.
It is pushed up by 6 and is in a state where the upper end portion jumps out to the conveying path as shown by A (two-dot chain line portion) in FIG. Then, when the transport pallet 122 is sent, the front end surface of the transport pallet 122 hits the stopper 105, and as shown in FIG.
The stopper 105 is pushed in the pallet conveying direction V as indicated by B (solid line portion). At this time, the shock absorber 106 absorbs the impact at the time of collision of the transport pallet 122, and the transport pallet 122 is softly stopped rapidly.

The pallet feeding device 111 includes an air cylinder 112 and a plunger 113 of the air cylinder 112.
The anti-back pawl 115 is rotatably supported by a U-shaped arm 114 provided at the tip of the anti-back pawl 115, and the upper end of the anti-back pawl 115 projects into the transport path. When the transport pallet 122 is sent, the anti-back claw 115 is pushed by the transport pallet 122 and retracts,
When the transport pallet 122 passes, it again jumps out to the transport path and faces the rear end surface of the transport pallet 122. As a result, the transport pallet 122 is stopped by the stopper 105 and, at the same time, is sandwiched by the stopper 105 and the anti-back claw 115 from the front and back, and positioned at the work station.

When the transfer pallet 122 is sent out from the work station, the stopper 105 is lowered from the transfer path by the air cylinder 102 and the transfer pallet 1 is moved.
22. At the same time, the air cylinder 112 is driven to linearly project the anti-back claw 115, and the anti-back claw 115 forcibly pushes the rear end surface of the transport pallet 122, and after the stopper is released, the transport pallet 122 is released.
Rapid delivery of.

[0010]

However, the above conventional example has a pallet stop device for rapidly stopping the transfer pallet while absorbing the impact at the time of collision, an anti-back function for the transfer pallet, and a rapid delivery function. Since the pallet feeding device is a separate device, it must be installed separately before and after each work station on the conveyor line. Therefore, the installation work of both devices and the adjustment work after the installation are required individually, which requires a lot of work on the site and the installation cost is high. In addition, since a separate installation space is required, a large installation space is required, which often interferes with the installation spaces of other devices, hindering effective use of the space.

Further, since the pallet stopping device and the pallet feeding device are separate, a driving air cylinder, a case, etc. are required for each device, and the number of parts is increased as a whole. It was expensive. Further, since both devices must be controlled separately, the control device and control circuit are also complicated.

The present invention has been made in view of the drawbacks of the above-mentioned conventional examples, and an object thereof is to compactly combine the functions required from the stop to the delivery of a transported object such as a transportation pallet. , By operating these functions in conjunction with each other, the installation space of the device equipped with these functions can be reduced, and the equipment cost and manufacturing cost can be reduced.
Furthermore, it is to facilitate the control method and the adjustment work.

[0013]

SUMMARY OF THE INVENTION A multi-function type conveyed object stopping apparatus of the present invention is a stopper for stopping a conveyed object being moved and an impact for absorbing an impact of the stopper generated when the conveyed object is stopped. An absorbing means, an anti-back means for preventing the transported body stopped by the stopper from retreating, and an interlocking mechanism for releasing the stopper from the transported body and rapidly starting the transported body by the anti-back means, And an actuator for operating the interlocking mechanism.

[0014]

In the present apparatus, the transported object can be stopped by engaging the stopper with the transported object.
At this time, since the shock absorbing means can reduce the impact when the transported object is stopped, the transported object can be prevented from bouncing by the stopper, and the transported object can be softly stopped. It is possible to prevent displacement and damage of the work mounted on the. Moreover, the transported object that collides with the stopper and bounces back is prevented from moving backward by the anti-back means, so that it rapidly stops.

Further, since the stopper can prevent the conveyed body from moving forward and the anti-back means can prevent the conveyed body from retracting, the stopper and the anti-back means accurately position the conveyed body when the conveyed body is stopped. it can.

Further, by operating the interlocking mechanism by the actuator, the transported object can be rapidly sent out by the anti-back means at the same time when the stopper is released.

Therefore, according to the multi-function type conveyed object stopping apparatus of the present invention, it is possible to compactly configure the multi-functions required from the rapid stop of the conveyed object to the rapid start of the conveyed object as one device. The stopper and the anti-back means can be driven by the actuator, and the structure can be simplified.

[0018]

1, FIG. 2, FIG. 3 and FIG. 4 are sectional views, a plan view, a front view and a partially omitted exploded perspective view of a multi-function type conveyance target stopping device P according to an embodiment of the present invention. The figure is shown.

As shown in FIGS. 4 and 1, the multifunctional device for stopping the transported object P is mainly composed of the cases 11a and 11b.
And a stopper 21 for stopping the transport pallet 1.
A shock absorber 31 for absorbing the shock of the stopper 21, an anti-back claw 41 made of resin or other material for positioning the transport pallet 1 while preventing it from moving backward, and the stopper 21 and the anti-back claw 41 are moved. And an air cylinder 71 for driving the movable arm 51.

The movable arm 51 has an anti-back claw support piece 52 which is projected obliquely upward from the rear part and a stopper support piece 53 which is projected upwardly on both side surfaces of the rear part. The shaft rod 13 whose both ends are supported by the bosses 12 of the cases 11a and 11b is rotatably attached to the cases 11a and 11b by inserting the shaft rod 13 into the through hole 54 in the central portion. A shock absorber 31 is attached to the front part of the movable arm 51 so as to penetrate vertically. The shock absorber 31 may be a hydraulic type, an air compression type, or a spring type, and when the plunger 32 is pressed against the elastic force, the plunger 32 is retracted, and when the pressing force is removed, the original state is restored. The plunger 32 is projected so that the repulsive force can be adjusted according to the usage conditions.

The stopper 21 is composed of an L-shaped metal stopper claw 22 and a resin attachment 23 for protecting the pallet. The attachment 23 is attached to the surface of the stopper claw 22 for receiving the transport pallet 1. There is. The stopper 21 has a hole 53 in the stopper support piece 53.
A pin 55 provided between a and a is inserted into the rear through hole 24 so as to be rotatably attached between the stopper support pieces 53, and the lower surface is brought into contact with the tip of the plunger 32 of the shock absorber 31. .

The anti-back claw 41 has a substantially parallelogram shape in which both front and rear faces in the vertical direction and both upper and lower faces are inclined obliquely downward toward the rear.
The pin 56 provided between the holes 52a is inserted into the through hole 42 so as to be rotatably attached between the anti-back claw support pieces 52. Therefore, the anti-back nail 4
In No. 1, when a load is applied to the upper end portion 43 from the rear, the upper end portion 43 rotates and the upper end portion 43 retracts downward. Further, after unloading, the upper end portion 43 of the anti-back claw 41, which has been retracted downward, again projects upward. For this purpose, the anti-back claw 41 may be biased in the returning direction by an elastic means such as a spring, or the anti-back claw 4 may be urged.
The center of gravity may be eccentrically located at the rear lower end of the anti-back claw 41 so that the upper end of the anti-back claw 41 is returned upward by gravity. However, the anti-back claw 41 has an upper end portion 43.
Is projected and stops in a state where the front surface 44 faces the vertical direction, and the rotation range is restricted by the stop pin 57 so that the upper end portion 43 cannot rotate further rearward.

The movable arm 51 is not directly driven by the air cylinder 71, but is driven by a pair of left and right link mechanisms. Two link plates 61, 62
Are rotatably connected at their ends by a link pin 63, and a cylinder head 73 fixed to the tip of a plunger 72 of an air cylinder 71 is attached to the center of the link pin 63. In addition, the link plate 62
The other end is rotatably supported by a pin 64 whose both ends are fixed to the bosses 14 of the cases 11a and 11b.
The other end of the link plate 61 is connected to the movable arm 5 by a connecting pin 65 that is inserted into the front through hole 58 of the movable arm 51.
It is rotatably connected to the front end portion of No. 1, and both link plates 61 and 62 and the movable arm 51 constitute a toggle mechanism.

The air cylinder 71 includes the cases 11a and 11
As shown in FIG. 3, the tip of the plunger 72 is fixed to a U-shaped metal fitting 16 rotatably attached to the lower portion of the hanging piece 15 of b. The cylinder head 73 pivotally attached to the link pin 63 as shown in FIG. Are linked to.

The multi-function type transporting body stopping device P configured as described above is installed in the front part of the work station for stopping the transport pallet 1 in the conveyor line as shown in FIG. 8, for example. On the other hand, on the lower surface of the front portion of the transport pallet 1 transported by the conveyor, a recess 2 is formed at a position facing the anti-back claw 41 when the transport pallet 1 is stopped by the stopper 21.
The front wall surface of is a locking surface 3 that is locked by the anti-back claw 41. Alternatively, the locking surface 3 may be a back surface of a crosspiece or ribs formed on the lower surface of the transport pallet 1.

Next, the operation from the stop to the delivery of the carrier pallet 1 in the work station will be described with reference to FIGS. 5, 6 and 7. FIG. 5 shows a state immediately before the front end of the transport pallet 1 reaches the installation position of the multifunctional transported object stopping apparatus P. The plunger 72 of the air cylinder 71 is projected, and the link mechanism including the link plates 61 and 62 extends linearly. In addition, the stopper 2
1 and the upper ends of the anti-back claws 41 project above the height of the lower surface of the transport pallet 1, and the stopper 21 is pushed up slightly by the plunger 32 of the shock absorber 31. At this time, when the conveyor pallet 1 is sent in the pallet conveying direction V by the conveyor, the anti-back claw 41 is pressed by the conveyor pallet 1 and retracts downward, and the front end surface of the conveyor pallet 1 collides with the attachment 23 of the stopper 21. To do.

FIG. 6 shows a state immediately after the transfer pallet 1 collides with the stopper 21. Transport pallet 1 is stopper 2
When it collides with 1, the shock absorber 31 absorbs the impact at the time of collision between the stopper 21 and the transport pallet 1, so that the transport pallet 1 stops softly. By softly stopping the transport pallet 1 in this manner, it is possible to prevent the work mounted on the transport pallet 1 from being displaced or damaged.

Further, since the impact when the transport pallet 1 collides with the stopper 21 is absorbed, the transport pallet 1 is not repelled by the stopper 21, and the transport pallet 1 can be quickly stopped. Moreover, the transport pallet 1
When the carriage pallet 1 collides with the stopper 21, the anti-back pawl 41 rotates and the upper end portion 43 thereof projects into the recess 2 and the front surface 44 of the anti-back pawl 41 faces the locking surface 3, so that the transport pallet 1 collides. Due to the repulsive force of, the movement of retreating to the side opposite to the pallet transport direction V is instantaneously blocked, and the transport pallet 1 is forcibly stopped. Therefore, the transport pallet 1 can be rapidly stopped without impact.

After stopping, the carrier pallet 1 has its front end face 4
The stopper 21 and the anti-back claw 41 sandwich the space between the locking surface 3 and the locking surface 3 and the positioning is performed at the work station. When the transport pallet 1 is positioned by sandwiching the front end surface and the rear end surface of the transport pallet 1 as in the conventional example, when the length of the transport pallet 1 is different, the transport of the different length is required unless the position of the anti-back claw 41 is adjusted. Although it cannot be applied to the pallet 1, since the positioning is performed between the front end surface 4 and the locking surface 3 of the transport pallet 1 in the present invention, even if the length of the transport pallet 1 is different, the positioning can be performed as it is.

At this time, since the movable arm 51 is locked by the toggle mechanism including the movable arm 51 and the pair of link plates 61 and 62, the movable pallet 1 is moved by the force of the transport pallet 1 pushing the stopper 21 in the pallet transport direction V. Does not rotate and no load is applied to the air cylinder 71. Although the stopper 21 is stopped with the plunger 32 of the shock absorber 31 retracted in FIG. 6, the transport pallet 1 may be positioned with the stopper 21 slightly pushed back by the plunger 32.

FIG. 7 shows the state of the transport pallet 1 when the stop is released. When air is sent to the air cylinder 71 and the cylinder head 73 is lowered, the movable arm 51 is rotated by the toggle mechanism, and the stopper 21 is disengaged from the front end surface 4 of the transport pallet 1. At the same time, the locking surface 3 of the transfer pallet 1 is rapidly projected by the rotational force of the anti-back claw 41, the transfer pallet 1 is sent out at a speed substantially equal to the speed of the conveyor, and is quickly transferred by the conveyor.

When the transport pallet 1 has finished passing over the multi-function type transported object stopping device P, the cylinder head 73 is raised again to return to the state of FIG. 5 until the next transport pallet 1 is sent. stand by.

Note that the multifunctional stopped device for a conveyed object of the present invention can have various embodiments other than the above embodiment. For example, in the above-described embodiment, the movable arm can be driven by the air cylinder via the link, but the movable arm may be directly driven by the air cylinder without the link. Even when the link is used, the impact force of the carrier pallet is transmitted to the pin as a tensile force generated in the link, as opposed to transmitting the impact force of the carrier pallet to the pin as a compressive force generated in the link as in the above embodiment. You can also However, in order to make the device compact, the configuration as in the above embodiment is preferable.

The actuator for driving the movable arm, which is the interlocking mechanism for interlocking the stopper and the anti-back claw, is not limited to the air cylinder, but an electromagnetic type such as a solenoid may be used. Further, in order to embody the interlocking mechanism, various mechanisms other than the configuration shown in the above-mentioned embodiment can be used.

[0035]

According to the present invention, the function required from the rapid stop of the transported object to the rapid delivery, that is, the transported object is rapidly stopped by the stopper while absorbing the impact at the time of stop, The integrated function of positioning and releasing the stopper from the transported object and simultaneously sending out the transported object simplifies the work such as installation on the conveyor line and adjustment after installation. You can
Installation costs can also be reduced. Further, since the apparatus shape can be made compact and the installation space in the conveyor line can be small, it is possible to avoid interfering with the installation space of other equipment and effectively use the space.

Further, the release of the stopper and the feeding of the transported object by the anti-back means can be mechanically interlocked by the interlocking mechanism, and this interlocking mechanism can also be operated by one actuator, so the control method Also, the control circuit etc. can be simplified.

Further, compared with the case where the pallet stopping device and the pallet feeding device are separately configured, the number of parts can be significantly reduced, and the manufacturing cost for realizing the same function can be reduced.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a plan view of the above embodiment.

FIG. 3 is a front view of the above embodiment.

FIG. 4 is an exploded perspective view of the above embodiment.

FIG. 5 is an operation explanatory view showing a state immediately before stopping the transport pallet in the same embodiment.

FIG. 6 is an operation explanatory view showing a stopped state of the transport pallet in the same embodiment.

FIG. 7 is an operation explanatory view showing a state when the transfer pallet is sent out in the embodiment.

FIG. 8 is a plan view of a conventional example.

FIG. 9 is a partially cutaway side view of the above conventional example.

[Explanation of symbols]

 1 Transport Pallet 21 Stopper 31 Shock Absorber 41 Anti-Back Claw 51 Movable Arm 61, 62 Link Plate 71 Air Cylinder

Claims (1)

[Claims] 1. A stopper for stopping a moving body to be transported, a shock absorbing means for absorbing a shock of the stopper generated when the body to be transported is stopped, and a backward movement of the body to be transported stopped by the stopper. A multi-function type cover including anti-back means for preventing the stopper, an interlocking mechanism for releasing the stopper from the transferred body and simultaneously rapidly starting the transferred body by the anti-back means, and an actuator for operating the interlocking mechanism. Carrier stop device.