JPS6050689B2 - Transfer interval widening device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transfer interval widening device that sends out objects, such as bundles of loose newspapers, which are transferred at irregular intervals in the front and back, at regular intervals.

When transporting bulk newspaper bundles, several bulk newspaper bundles may be transported side by side on the transport path.

In order to transfer this at regular intervals, a gap expanding device as shown in FIG. 1 has conventionally been used. That is, between the sending conveyor 2 which is continuously operated by the motor 1 and the feeding conveyor 4 which is operated by the motor 3, there is a newspaper bundle M.
A small conveyor row 5 in which an appropriate number (four in the figure) of small conveyors 5a, 5b, 5c, and 5d of approximately equal length to the length in the transfer direction are connected.
A chain 8 is attached to a sprocket 7 which is transmitted to each drive shaft 6 of the small conveyor via a clutch.
This is continuously driven by a motor 9, and the small conveyors 5a to 5 are driven by the clutch and the brake 10 provided on each drive shaft 6.
Performs start/stop control of 5d. Each conveyor 2, 5a-5
Photoelectric switches 11, 11a, llb, llc, and lld are provided at regular intervals on the sides of d as newspaper bundle detectors, respectively. The small conveyors 5a to 5d are stopped under the following conditions. In other words, the first small conveyor 5a is operated when the newspaper bundles M1 and M2 block both the photoelectric switches 11 and lla, and the small conveyor 5b is operated when the small conveyor 5a stops and the newspaper stack M3 blocks the photoelectric switch 11b. , the small conveyor 5c stops when the small conveyor 5b stops and the newspaper stack M4 blocks light from the photoelectric switch 11c, and the small conveyor 5d stops when the small conveyor 5c stops and the newspaper stack M5 blocks light from the photoelectric switch 11d. do. Therefore, the newspaper bundles M1 to M5 arrive next to each other, and the first newspaper bundle M
1 transfers to the delivery conveyor 2 and blocks the photoelectric switch 11 from light, all the subsequent photoelectric switches 11a to 11d are blocked from light, so when the small conveyor 5a stops, the following small conveyors 5a to 5d also stop one after another. , newspaper bundle M2-M5
are stopped adjacent to each other on the small conveyors 5a to 5d, respectively. Then, only the leading newspaper bundle M1 continues to move forward by the delivery conveyor 2. When the newspaper bundle M1 passes through the photoelectric switch 11 and the photoelectric switch 11 passes the light, the small conveyors 5a to 5d are started all at once after a time T seconds until the predetermined interval ' is reached.

Then, when the newspaper bundle M2 is transferred to the delivery conveyor 2 and the photoelectric switch 11 is shielded from light, the small conveyors 5a to 5c stop again in the same manner as described above. Therefore, a series of newspaper bundles M2~
Each time M5 reaches the small conveyor 5a one after another, the stack of newspapers behind it starts and stops repeatedly, causing the load to collapse.
Later, it will cause trouble to automatic address transfer machines and automatic packaging machines.

SUMMARY OF THE INVENTION An object of the present invention is to provide a transfer interval widening device which improves the starting method of a small conveyor and prevents the collapse of the cargo.

Examples of the present invention will be described below. The present invention also includes the same conveyor, its driving device, and photoelectric switch as in FIG. 1, but its control circuit includes three improved control circuits shown in FIG. 2. The photoelectric switches 11, 11a to 11d each have a controller C that operates each time the newspaper bundle M blocks light, as shown in FIG. 2b.
, a photoelectric relay P energized by the output of Ca-Cd,
It is composed of Pa-Pd.

In Fig. 2c, SVa, SVb, SVc, and SVd are relays for controlling the operation of the small conveyors 5a, 5b, 5c, and 5d, respectively. 4. Stop the conveyor, and when it is de-energized, start the small conveyor in the opposite direction.

In Fig. 2a, Ra, Rb, Rc, and Rd are auxiliary relays, Ta, '11), Tc, and Td are timers, and the set time is such that the tip of each newspaper bundle M is connected to the small conveyor 5a,
5b, 5c, 5d and photoelectric switches 11a, 11b
, 11c, 11d until the operation control relays SVa, SVb, SVc, and SVd of the small conveyor are energized. It is stopped at a position where the front and rear ends almost coincide with each other. The timer T and the relay R are especially provided according to the present invention, and the details thereof will be described later.

Each of the above-mentioned photoelectric relays, operation control relays, timers, relays, etc. has contacts whose codes are expressed in lowercase letters, and multiple contacts belonging to the same relay are classified by adding numbers to the above-mentioned lowercase letters. The contacts are connected as shown in Fig. 2A, b.

In Fig. 2a, the detection signals of the photoelectric relays P and Pa-Pd actuate the auxiliary relays Ra-Rd, Rl timer Ta-TdlT, and operation control relays SVa-SVd to transfer a series of newspaper bundles M1 to M5 onto the conveyor 5a. There is a control circuit for stopping the newspaper bundles 5a to 5d above the newspapers 5a to 5d, or for starting the stopped newspaper bundles 5a to 5d sequentially at predetermined intervals from the front. Next, the operation of the present invention will be explained.

However, circuit elements are represented by only symbols. (1) First W
All a-SVd are de-energized, and the small conveyor row 5 is in operation.

When the newspaper bundles M1 to M5 enter the small conveyor row 5 from the conveyor 4 with their front and back adjacent to each other, one
1d to 11a are sequentially shielded from light, and Pd-Pa are sequentially energized, but P is still deenergized and p1 is listening, so R
d-Ra is inactive. (2) When the leading newspaper bundle M1 blocks light from the photoelectric switch 11, P is energized, closing p1 and opening P2. At this point, the heads of M2 to M5 are at the positions of the photoelectric switches 11a to 11d, respectively. When p1 closes, Ra and Ta are energized, and are self-retained by Ral, while Ra2 is closed and Rb and Tb are energized.

When Rb is energized, Rbl is closed and self-retained, and Rb2 is closed and Rc and Tc are energized. When Rc is energized, it is self-held by Rcl and Rc2 is closed.
However, Rd is not energized because Td is open. Ra,
Rb, Rc. Even if Ta, Tb, and Tc are energized as described above, Ta, tb, and tc are still open before the set time limit.
Since Rd is also deenergized, SVa to SVd are all deenergized, and the small conveyor row 5 is in an operating state.

(3) When Ta-Td operates after the set time and Ta-gate closes, SVa, SVb, and SVc are energized, and Rd is energized and Rd3 is closed, so SVd is also energized, and the small conveyor row 5 stops.

Therefore, M2 to M5 are the small conveyors 5a to 5d, respectively.
It stops at the top and only M1 continues to move forward by the conveyor 2. If there is an interval between the newspaper bundles M1 to M5, Pa-Pd is temporarily deactivated during this interval, but the result is the same as in the third term.

Furthermore, even if Ra-Rd is biased as described above, P2
, pa3, pb4, and pc4 are all open, so they are deenergized.

(4) When M1 passes the photoelectric switch 11, p1 opens and P
2 is closed and T is energized.

The set time period of T is the time until the rear end of M1 moves forward by a predetermined distance L1 from the position of the photoelectric switch 11. When t1 opens after this time, Ra loses self-holding and is deenergized, and T
and SVa is deactivated. This activates the small conveyor 5a and moves M2 forward. Further, by opening T2, R is deenergized and r1 to R3 are closed. When M2 passes the photoelectric switch 11a, Pa is deenergized, Pa2 is opened, Pa3 is closed, and T is energized again.

When the time for M2 to further advance by a predetermined distance L has elapsed, T2
is closed and R is energized to open r1. As a result, Rb, Tb
loses self-holding and becomes deenergized, and , T and SVb deactivate. Therefore, the small conveyor 5b is activated and moves Nl3 forward. As mentioned above, T. R acts to start the trailing newspaper bundle when the leading newspaper bundle advances by a distance L from the trailing newspaper bundle. Thereafter, M4 and M5 move forward at a predetermined interval in the same manner, and eventually M1 to M5 are transferred to the conveyor 2 at a constant interval.

In the above operation, the small conveyors 5a to 5c operate, and the 5
d is stopped, the following newspaper bundle M6 is placed on the conveyor 4.
When M5 is transferred and blocks light from the photoelectric switch 11e, start the small conveyor 5d without passing the set time of T, and stop it when M5 comes to the small conveyor 5a (1)
- (4) perform the operations.

In the above embodiment, four small conveyors were used to process up to five newspaper bundles, but in general, N-1 small conveyors may be provided to process N newspaper bundles.

As described above, in the present invention, after the small conveyor row 5 has stopped once, the first small conveyor is activated in order to spread the newspaper bundles at regular intervals. The stack of newspapers only needs to be stopped once, which is far fewer than in the past, and is extremely effective in preventing the stack from collapsing.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an elevational view schematically showing the conveyor arrangement and operation control device in a conventional example and an embodiment of the present invention, and FIGS. 2A and 2B show an example of the control circuit of the present invention. FIG. 2C is an explanatory diagram showing the assignment of circuit elements to the conveyor.

2...Outgoing conveyor, 4...Incoming conveyor, 5...Small conveyor row, 5a to 5d...
・Small conveyor, 11, 11a to 11d... Transferred object detector, SVa to SVd... Start/stop device, P, Pa-Pd, Ra to Rd, Ta-Td...・・・
・・Stop control circuit, P, Pa-Pd, Ra-Rd, R,
T...Start control circuit, M1 to M5...Transferred objects.

Claims (1)

[Claims] 1 A small conveyor row connected between a continuously operating sending conveyor and an incoming conveyor, and consisting of a plurality of small conveyors having approximately the same length as the transported object and facing each other in the front and back, and a row of small conveyors connecting the sending conveyor and each small conveyor in parallel to each other. It has transport object detectors provided at intervals, a starting/stopping device provided individually for each small conveyor, and a control device for operating the starting/stopping device. Alternatively, a stop control circuit that stops the next stage small conveyor based on an AND signal of the transport object detection signal of the small conveyor and the transport object detection signal of the next stage small conveyor, and the transport object of the previous stage delivery conveyor or small conveyor. 1. A transfer interval expanding device comprising: a start control circuit that starts a next stage small conveyor after a predetermined time period after the detection signal disappears.