JPH0130425Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) This invention relates to a pusher conveyor device with width-adjusting rollers that is optimal as a conveyance means for a weighing and pricing device used in combination with a packaging machine.

A pusher conveyor device with width shifting rollers has a positioning plate arranged in an upright manner on one side of the pusher conveyor, and a width shifting roller that moves the conveyed object in the direction of this positioning plate is integrated into the pusher conveyor. This device also performs width adjustment at the same time. Such a pusher conveyor device with width adjusting rollers is used, for example, as a conveyance means of a weighing and value marking device used in combination with a packaging machine. The weighing and pricing device weighs the stretch-wrapped product, calculates the price from this weight value and the unit price of the product, and issues a label with data such as the calculated price, product name, and unit price printed on it. This is a device that automatically attaches labels to products that are being transported.
It is necessary to align and position the product while it is being transported.

(Prior Art) The conventional drive mechanism for the above-mentioned pusher conveyor with width shifting rollers is to drive the pusher conveyor and width shifting rollers independently by separate motors, or to apply driving force to the drive source of the pusher conveyor via gears, etc. The system uses a configuration that transmits the information to drive the width adjustment rollers.

In this way, if the drive source for the pusher conveyor and the drive source for the width adjustment rollers are separate, it is possible to control each independently, but it also increases the price.
This method requires a large amount of space and has the disadvantages that the device is heavy. In addition, in the case where the drive force is transmitted to the drive source of the pusher conveyor via a gear or the like to drive the width adjustment rollers, the width adjustment rollers are constantly rotating during the operation of the pusher conveyor, so the width adjustment rollers are used to control the conveyed objects. Even after it is brought into contact with the positioning plate (width-aligned), it remains in a rotated state.
In this case, after the width shifting is completed, the load applied to the width shifting rollers increases significantly, and the conveyed object is pressed against the positioning plate, so the frictional force between the conveyed object and the positioning plate increases, and the pusher conveyor The load on the system also increases. Therefore, in conventional equipment, when the weight of the conveyed object is heavy, after the width adjustment is completed, the conveying force of the pusher conveyor decreases due to an increase in the load applied to the drive source, and the conveying speed of the pusher conveyor changes, causing the label to There is a drawback that the attachment position varies. Especially when the object to be conveyed is very heavy, the pusher conveyor sometimes stops. Further, the load applied to the drive source increases significantly after the end of the width adjustment, which wastes power, which is uneconomical, and also shortens the lifespan of the drive source. Furthermore, after the width adjustment is completed, the width adjustment roller idles while slipping with respect to the object to be conveyed, which causes noise generation and has the disadvantage that the bottom surface of the object to be conveyed may be deformed.

(Problems to be solved by the invention) This invention was made in view of the above circumstances, and its purpose is to drive the pusher conveyor and width adjustment rollers by the same drive source. To provide a pusher conveyor with width shifting rollers that can consume less power and reduce noise generation without significantly increasing the load applied to a drive source even after width shifting is finished.

(Means for solving the problem) The pusher conveyor with width shifting rollers according to this invention has an electromagnetic structure in the mechanism that transmits the driving force of the drive source to the width shifting rollers as a means to solve the problems of the conventional technology described above. After the width adjustment is completed using a clutch, the transmission of the driving force to the width adjustment rollers is cut off by controlling the electromagnetic clutch.

(Function) With the configuration as described above, after the width adjustment is completed, the width adjustment roller is not driven and stops rotating.
Therefore, the load on the drive source is reduced, and the object to be transported is no longer pressed against the positioning plate.

(Example) Hereinafter, the present invention will be explained in detail using an example shown in the drawings.

1 in the figure is a pusher conveyor, which includes a pair of chains 1a, 1a, a pusher 1b provided to communicate between the chains 1a, 1a, four sprockets 1c for stretching the chains 1a, 1a, 1c, 1c', 1c'. 1
0 and 10 are side plates arranged in parallel, and beam plates 11a, 11b, 11c are placed at a predetermined interval between the side plates.
The machine frame 12 is constructed by passing and disposing them respectively. Shafts 13 and 14 are freely rotatably disposed at both ends of the machine frame 12 in the longitudinal direction, and the sprockets 1c, 1c and 1c', 1 are installed at both ends of each shaft.
Fit c′. And each sprocket 1c, 1
A chain 1a is stretched between the chains 1a and 1a, and a pusher 1b is provided between the chains 1a.

The pusher conveyor 1 includes a loading roller conveyor 5 on its upstream side (left side in the drawing) and a width adjusting roller conveyor 6 on its downstream side (right side in the drawing) in an inclined manner and integrally. The inclined surface formed by this is the conveyance surface of the pusher conveyor 1. For this reason, the shape of the pusher 1b is such that the end on the conveying surface side is parallel to the conveying surface. In addition, when the carrying-in roller conveyor 5 is used as a weighing value attaching device, it is a weighing conveyor with a built-in load cell, weighs the conveyed object on the conveyor, and sends a weighing signal to the upper part of the lower end of the width-adjusting roller conveyor. is supplied to a label printer (label printing, issuing and pasting device) installed at

Loading entrance of roller conveyor 5 (upper side of drawing)
Transfer rollers 15, 15 are provided. The transfer rollers 15, 15 are driven by a drive motor M2, and are used to smoothly transfer objects to be carried in from the top of the drawing to the carry-in roller conveyor 5.

The carry-in roller conveyor 5 has rollers 5b, 5b, .
are connected, and a guide plate 5d is provided at the lower end in an upright manner.
That is, the conveyed object carried in via the delivery rollers 15, 15 is moved by the rollers 5b, 5b, . . . due to its own weight.
and reaches the attitude control board 5c. At this time, a light object to be conveyed stops halfway along the attitude control plate 5c, and a heavy object to be conveyed collides with the guide plate 5d, and either comes into contact with the guide plate 5d or rebounds and stops at a position near the guide plate 5d. . The attitude control plate 5c is configured to adjust the attitude of the pusher conveyor 1 at the stop position for light conveyed objects.
For heavy objects, guide plate 5d
This acts to weaken the force of the collision.
Note that the rollers 5b, 5b... are divided at both ends in the longitudinal direction and rotate independently so that even if the conveyed object is small and lightweight, it can be moved smoothly in the direction of the guide plate 5d due to its own weight. It's becoming like that.

The width adjustment roller conveyor 6 has auxiliary rollers 6b, 6b, .
are provided in a freely rotatable manner, width shifting rollers 3, 3... are provided in parallel below these rollers 6b, 6b..., and an auxiliary roller 6c is freely provided below these width shifting rollers 3, 3... At the bottom end there is a positioning plate 2.
is installed. This positioning plate 2 has a pivot 6
It is rotatably attached to the frame 6a by d and 6d, and its rotational range is set to a necessary and sufficient range to operate a micro switch 6e, which will be described later, by means of a locking member (not shown). It's becoming regulated. It is constantly urged in the direction of arrow A in FIG. 2 by a biasing means (not shown).

A micro switch 6e is arranged near the positioning plate 2 on the bottom back surface 6f of the frame 6a. The arrangement position of this micro switch 6e is such that its operating portion 6e' is not pressed in the normal state where the positioning plate 2 is biased in the direction of arrow A;
is set so that it is pressed when it is rotated in the direction of arrow B.

The positioning plate 2 is for positioning the transported object by coming into contact with one side of the transported object, which has been brought closer to its width, and is disposed continuously with the guide plate 5d.
Therefore, the actuating part 6 of the micro switch 6e
E' is pressed when one side of the object to be transported comes into contact with the positioning plate 2 and the positioning plate 2 rotates in the direction of arrow B.

In addition, pulleys 3a, 3a... are fitted to one ends of the shafts of the width adjusting rollers 3, 3..., respectively, and adjacent pulleys 3a, 3a... are connected to each other by belts 3b, 3a...
3b... are configured to rotate together in the same direction by linking with each other.

Next, the drive mechanism of the pusher conveyor 1 and the width adjusting rollers 3, 3, . . . will be explained.

First, the drive shaft 7 of the pusher conveyor 1 and the drive shaft 8 of the width adjustment rollers 3, 3, . Attach the drive motor M1 via. The drive motor M1 and the drive shaft 7 are provided with gears G1 and G2, respectively, and mesh with each other.
A pulley P1 and a bevel gear G3 are provided coaxially. A bevel gear G4 meshing with this bevel gear is provided on one shaft 13 of the pusher conveyor 1, and the pusher conveyor 1 is driven by a drive motor M1.

A pulley P2 is fixed to one end of the drive shaft 8,
It is linked to the pulley P1 of the drive shaft 7 via a belt 17. A pulley P3 is provided at the other end of the drive shaft 8 via an electromagnetic clutch 4. Then, this pulley P3 and the pulley 3a on the positioning plate 2 side are connected to the belt 1.
8 to form a drive mechanism for the width adjusting rollers 3, 3, . . .

The electromagnetic clutch 4 has a cylindrical shape with rotating shafts provided at both ends, and is equipped with an electromagnet inside. When a current is supplied to this electromagnet, the respective rotating shafts are connected internally, and the rotation of one shaft is transmitted to the other shaft. When current is supplied to the electromagnet,
Each rotating shaft is separated and rotates independently. Therefore, rotation of one axis is not transmitted to the other axis. The device of this embodiment is constructed so that the current supplied to the electromagnetic clutch 4 is interrupted when the operating portion 6e' of the microswitch 6e is pressed.

In the embodiment described above, the object to be conveyed, such as a stretch-wrapped product, is conveyed to the conveyor roller 5 via delivery rollers 15, 15. Due to its own weight, the imported products are moved by rollers 5b and 5b.
It slides on the top and reaches the attitude control board 5c. For lightweight products, place the product in front of the attitude control board 5c or the attitude control board 5.
A product of normal weight that stops on the guide plate 5d collides with the guide plate 5d and stops in contact with or near the guide plate 5d. The heavy product collides with the guide plate 5d and stops at the position where it rebounds. The products on the carry-in roller conveyor 5 are conveyed by the pusher conveyor 1 onto the width-aligning roller conveyor 6, and then moved to the width-aligning rollers 3a, 3.
The width of the positioning plate 2 is shifted by a. When one side of the product comes into contact with the positioning plate 2 and width adjustment is completed, the positioning plate 2 is rotated in the direction of arrow B in FIG. 2 by the pressing force of the product generated by the width adjustment roller 3. . As a result, the operating portion 6e' of the microswitch 6e is pressed, opening the current supply circuit of the electromagnetic clutch 4, and interrupting the current supply to the electromagnetic clutch 4. Therefore, the transmission of the driving force of the drive motor M1 is cut off to the width adjusting rollers 3, 3, .

When the above embodiment is used as a conveyance means of a weighing value labeling device, the loading roller conveyor 5 is used as a weighing conveyor, and when the product is stopped, the weight of the product is measured, and this weight value is sent to the label printing, issuing and pasting device. supply The label printing, issuing and pasting device is disposed above the lower end of the width shifting roller conveyor 6, and automatically attaches a label with a measurement value to the product after width shifting is completed. The labeled products are continuously transported by the pusher conveyor 1 and delivered to a conveyance device such as a sorting conveyor connected to the lower end of the width-aligning roller conveyor 6.

In addition, in the above-mentioned embodiment device, when the actuating part 6e' of the micro switch 6e is pressed, the rotation of the width adjusting rollers 3, 3, etc. is immediately stopped, but when the actuating part 6e' is pressed After that, the width adjusting rollers 3, 3, . . . may be configured to stop rotating after a certain period of time has elapsed. With this configuration, even if the posture of the product is tilted with respect to the transport direction and the positioning plate 2 is pressed and rotated by the corner portion of the product, one side of the product can be reliably positioned. It can be brought into contact with the plate 2, and width adjustment can be performed reliably.

Furthermore, in the embodiment, the width shifting rollers 3 were configured to be constantly rotated even when there was no product on the width shifting roller conveyor 6, but the loading roller conveyor 5 and the width shifting roller conveyor 6
A transmission-type optical sensor for product detection is arranged at the boundary between the width-shifting rollers 3, 3, . It is also conceivable to start the rotation. By configuring in this way, the control circuit becomes somewhat complicated, but power consumption can be further reduced. In this case, if the width shifting rollers 3, 3, etc. are configured to start rotating when the product has been completely conveyed onto the width shifting roller conveyor 6, rotation of the product that occurs at the boundary can be prevented. become.

In the above-described embodiment, the loading roller conveyor 5 and the width shifting roller conveyor 6 are inclined, but they are not limited to this and may be horizontal, and the conveying direction of the conveyed objects may also be The direction is not limited to the direction perpendicular to the direction perpendicular to the pusher 1b, and a configuration in which the material is dropped from the upper part of the pusher conveyor 1 onto the pusher conveyor 1 can also be considered.

(Effects) As explained above, the pusher conveyor device with width aligning rollers according to this invention includes a pusher conveyor, a positioning plate disposed in an upright manner on one side of the pusher conveyor, and a positioning plate that is integrally incorporated into the pusher conveyor to carry the conveyed object. A width adjustment roller that moves an object toward a positioning plate, a common drive source that drives this width adjustment roller and the pusher conveyor, and an electromagnetic clutch interposed in a driving force transmission mechanism between this drive source and the width adjustment roller. and a detection means for detecting that the conveyed object has come into contact with the positioning plate, the electromagnetic clutch is controlled based on the detection signal of the detection means, and after the widthwise alignment of the conveyed object is completed, Since it is characterized by cutting off the transmission of the driving force to the width adjustment roller, after the width adjustment is completed, the rotation of the width adjustment roller is stopped, and
The load on the drive source begins to decrease.

Therefore, there is no possibility that the conveyance force of the pusher conveyor decreases after the end of width adjustment, causing the conveyance speed to change or the conveyance to stop, which is the case with conventional devices of this type. Furthermore, as the load on the drive source is reduced, power consumption is also reduced and the lifespan is extended. Furthermore, the generation of noise is reduced, and the risk of damaging the bottom surface of the transported object is also reduced.

Therefore, this invention has extremely beneficial effects in practice.

[Brief explanation of drawings]

FIG. 1 is a plan view of a pusher conveyor with width adjusting rollers embodying the present invention, and FIG. 2 is a sectional view taken along the line - in FIG. 1. In the figure, 1 is a pusher conveyor, 2 is a positioning plate, 3 is a width adjusting roller, 4 is an electromagnetic clutch, 6e
indicates a micro switch, and M1 indicates a drive motor.

Claims (1)

[Scope of utility model registration request] a pusher conveyor, a positioning plate disposed in an upright manner on one side of the pusher conveyor, and a width shifting roller that is integrally incorporated in the pusher conveyor and moves the conveyed object in the direction of the positioning plate;
A common drive source that drives the width shifting roller and the pusher conveyor, an electromagnetic clutch interposed in a driving force transmission mechanism between the drive source and the width shifting roller, and a conveyed object that comes into contact with the positioning plate. and a detection means for detecting that the electromagnetic clutch is controlled based on a detection signal of the detection means,
A pusher conveyor device with width adjustment rollers is characterized in that the transmission of driving force to the width adjustment rollers is cut off after the width adjustment of the conveyed object is completed.