JPS5838343B2 - storage conveyor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a storage conveyor that freely controls the flow of workpieces on the conveyor to carry out free-cycle conveyance when conveying objects such as machined products.

A storage conveyor that stops the flow of conveyed objects on the conveyor, stores the objects, and carries in and out an appropriate number of objects when desired has conventionally consisted of a traction section of the conveyor that rotates at a constant speed, and a conveyor that rotates at a constant speed. The conveyor was equipped with a cart that was disposed in a towable manner on the towing section and ran around the conveyor, and the engaging portion between the towing section and the cart was comprised of various hooks and the like.

Therefore, the connection and disconnection between the conveyor's towing section and the cart cannot be performed smoothly, and especially when the end of the conveyor is inverted, the towing section is overloaded due to the weight of the cart, and the cart and the towing section are unnecessarily overloaded. There were problems with the engine becoming disengaged and the connecting parts of the towing section being prone to wear.

This invention was made in order to solve the above-mentioned problems, and it is possible to smoothly run a trolley on which objects are placed along a conveyor, and to reduce the wear and tear of the various parts when connecting and disconnecting the trolley and the traction section of the conveyor. To provide a storage conveyor which can be carried out smoothly without causing any damage, and which can reliably tow and convey a cart even if it falls at a reversal point at the end of the conveyor.

Embodiments of the present invention will be described below based on the drawings.

Fig. 1 shows a front view of the storage conveyor, and Fig. 2 shows its plan view. The drive sprocket 8 and the driven sprocket 5 are connected to each other.

On the conveyor chain 1, as shown in FIGS. 3 and 4, traction parts 6 are continuously fixed at regular intervals.

The traction unit 6 is configured by pivotally supporting swinging rollers 6b on both sides of the base plate 6a, and installing guide rollers 6c via brackets on both lower sides of the base plate 6a. The swinging rollers 6b on both sides are each urged inwardly by a coil spring 6d that is pivotally supported at the tip of a swinging arm that is swingably supported on a shaft provided above, and is fitted onto the shaft.

Note that the swinging width of the swinging roller 6b is limited within an appropriate range.

Guide rails I that engage with guide rollers 6C of the traction section 6 are attached along the longitudinal direction to the upper and lower tiers on both sides of the conveyor body.

Further, above and below both sides of the traction portion 6 of the conveyor chain 1, rails 11 for a trolley-shaped tray 12, which will be described later, are laid along the longitudinal direction.

These four rails 11 are connected to the side walls 2 and 3 at both ends of the conveyor.
It is connected to a semicircular guide groove 13 formed on the inner surface, and the track of the trolley-shaped tray 12 is formed around the entire circumference of the conveyor.

As shown in FIGS. 3 and 4, the trolley-shaped tray 12 carries a workpiece 14 to be transported, and connects the rails 11 and guide grooves 13.
It runs in a free cycle with the top being towed by a towing unit 6. A support plate 12b is erected on the base plate 12a, and four guide rollers 12c are attached to the lower part of both sides of the base plate 12. On the lower surface of the base plate 12, traction force members 12d that engage with the swinging roller 6b of the traction portion 6 are fixed on both sides.

This traction force member 12d is attached with each cam surface facing outward, and the traction member 6 runs downward at a constant speed.
The traction force arm 12d and the swinging roller 6b engage with each other by being pressed inward from both sides by the upper swinging roller 6b.

Therefore, when the force with which the swinging roller 6 presses the cam surface of the traction force member 12d due to the biasing force of the coil spring 6d is weak relative to the force with which the traction unit 6 pulls the trolley-shaped tray 12, the swinging roller 6b If the pushing force of the swing roller 6 is stronger than the traction force, the trolley-shaped tray 12 will be towed by the traction unit 6 and move forward.

15 is a guide board attached to the middle part of the rotating shafts 8 and 9 at a position sandwiching the swinging roller 6b of the traction section 6 from both sides, and guides the traction section 6 approaching the end of the conveyor. , operates to press the swinging roller 6b inward so that the swinging roller 6b does not come off the traction force member 12d of the trolley-shaped tray 12.

That is, at the reversal point at the end of the conveyor, particularly at the point where the trolley-shaped tray 12 rises from the lower stage to the upper stage, the inward biasing force of the swinging rollers 6b that pulls the trolley-shaped tray 12 due to the weight of the trolley-shaped tray 12 is weaker than the traction force. Then, the swinging roller 6
In order to prevent b from exceeding the traction force beam 12d and making traction impossible, the guide plate 15 moves the swinging roller 6b inward at this point to maintain engagement with the traction force beam 12d. It's being pushed to.

This broken guide plate 15 was urged to a fixed position inside by a coil spring 16 fitted on the rotating shafts 8 and 9, and a foreign object became caught between the guide plate 15 and the swinging roller 6b. In such a case, the guide plate 15 is configured to be able to be moved in the axial direction to remove foreign matter.

1 and 2, reference numeral 17 denotes a stop device for stopping the trolley-shaped tray 12 at the loading position of the workpiece 14 and below the loading position, and the stopper bins 17b, 17c are interlocked by the operation of a fluid pressure cylinder 17a. protrudes from both sides of the trolley-shaped tray 12 to stop it.

On the other hand, a stop device 18 is also attached to the unloading position of the workpiece 14, and interlocking stopper bins 18b and 18c are protruded from both sides of the trolley-shaped tray 12 and engaged by the operation of the fluid pressure cylinder 18a, and the trolley-shaped tray 12 is temporarily stopped. After stopping, each time the hydraulic cylinder 18a is activated, one trolley-shaped tray 18 is advanced to load the workpieces 14 one by one onto the carrying-out rail 19 and to be carried out.

Next, the operation of this storage conveyor will be explained.

The conveyor chain 1 is driven at a constant speed by the driving sprocket 4, and while the traction part 6 fixed to the chain 1 is rotating at a constant speed, the stop device 17 causes the stop pin 17c to protrude upward and the stop pin 17b to move downward. Empty trolley-shaped tray 1 on the lower stage of the conveyor.
2 is on standby, and an empty trolley-shaped tray 12 is placed at the loading position above.
The machine stops.

While the trolley-shaped tray 12 is stopped by the stop device 17, the swinging roller 6b of the traction unit 6 moves at a constant speed, exceeding the traction force 12d of the trolley-shaped tray 12 that is stopped.

The workpiece 14 is transferred to the trolley-shaped tray 1 by the manipulator 20.
2 and the hydraulic cylinder 17a of the stop device 17
When the stopper bin 17c is activated and the stopper bin 17c is lowered, the trolley-shaped tray 12 holding the stopped workpiece 14 is pulled by the towing section 6 and advances.

At the same time, the stopper pin 17b is raised and the stopper pin 17b is raised.
Cart-shaped tray 1 at the beginning of the lower stage with the lower end of c protruding downward
Stop 2.

Then, when the fluid pressure cylinder 17a is operated again and the stopper pin 17c is raised and the stopper pin 17b is lowered, the second trolley-shaped tray 12 in the lower stage is thereby stopped, and the leading trolley-shaped tray 12 is moved to the towing section 6. It engages and advances, ascends the reversing section, and is stopped at the carry-in position by the protruding stop pin 17c to wait for the work 14 to be carried in.

On the other hand, the trolley-shaped tray 12 that has been engaged with the traction portion 6 and advanced forward of the conveyor advances to the unloading position 1 and is stopped by a protruding stopper bin 18b.

Thereafter, when the workpiece 14 is carried in repeatedly, the cart-shaped tray 12 holding the upper workpiece 14 is lined up and waiting behind the stopper bin 18b. When the pressure cylinder 18a is operated and the stopper bin 18b is lowered and the stopper bin 18C is raised, the leading cart-shaped tray 1
2 engages with the traction portion 6 and moves forward, and the second and subsequent trolley-shaped trays 12 continue to stop.

When the cart-shaped tray reaches the end of the conveyor, the workpiece 14 on it is transferred to the carry-out rail 19 and sent to the next process, and is pulled by the cart-shaped tray 12l/'i traction unit 6 and reversed from the upper stage to the lower stage. Then go to the right at the bottom.

Then, the stop device 18 returns to the state in which the leading end is stopped at a predetermined position by the next operation of the fluid pressure cylinder 18a, and the above operation is repeated in response to signals from the previous and next process devices.

As described above, according to the storage conveyor of the present invention, the towing part and the trolley-shaped tray are biased so as to sandwich the towing cam provided on the lower surface of the trolley-shaped tray from both sides, Since the trolley-shaped tray is configured to be conveyed in a free cycle by being connected by engagement with the supported swinging roller, when the trolley-shaped tray is controlled to stop, the swinging roller will not slip on each part. It easily passes over the traction cam without causing any wear, so that the traction can be smoothly released and the traction can be reliably carried out.

Furthermore, a guide plate is provided that guides the swinging roller to the reversing section of the conveyor so as to forcibly engage it with the traction cam, so that when the trolley-shaped tray rises at the reversing section, it will not slip due to its weight. It has the advantage of being able to be towed reliably without causing wear to any parts.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a front view of the storage conveyor, Fig. 2 is a plan view thereof, Fig. 3 is an enlarged sectional view taken along line A-A in Fig. 2, and Fig. 4 is a traction section. FIG. 3 is a perspective view of the trolley-shaped tray. 1... Conveyor chain, 6... Traction & 6b... Rocking roller, 11... Rail, 12... Cart tray, 12d・・・・・・
- Towing cam, 15...Guide board.

Claims (1)

[Claims] 1 The storage conveyor is equipped with a traction section that is continuously attached to a conveyor chain, and a trolley-shaped tray that is held on both sides by rails on the outer periphery of the traction section and travels while being towed by the traction section. Two swinging rollers that are biased in one direction are pivotally supported in the part, and a traction cam that engages with the swinging rollers is fixed to the trolley-shaped tray.
A storage conveyor characterized in that a guide plate is provided on the reversing portion of the conveyor for guiding the swinging roller so as to forcibly engage the swinging roller with the traction cam.