JPH0123645Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an apparatus for sequentially feeding sheets into a predetermined position such as a sheet forming apparatus.

Conventionally, as shown in Figure 7, sheets are fed in a two-step system using a conveyance device consisting of a truck with a front arm extending forward, a daystat car, and an endless belt with permanent magnets at predetermined positions on the lower belt. Because this process was carried out one sheet at a time, in order to feed two sheets at the same time, it was necessary to install two pieces of equipment side by side, which meant that the equipment was large-scale and the equipment cost was high. Since the sheet is attracted and fed against the magnetic force by the underside of the belt, the operation is unstable and there are problems such as the sheet being misaligned during conveyance. Another method has been seen in which stacked sheets are sucked up one by one, moved horizontally, and then lowered and transferred to a relay position where they are transferred to the next trolley, but this method still only picks up sheets one by one. It had the disadvantage that it could not be fed, was slow, and could not match the sheet forming speed.

The present invention solves the problems of the prior art described above, and therefore, the purpose of the present invention is to be suitable for high-speed conveyance, simplify the mechanism to a one-stage system, and be able to feed two sheets at the same time. It is an object of the present invention to provide a sheet feeding device having an operationally preferable structure.

A feature of the present invention is that a reciprocating truck is used, and the truck is equipped with a pair of front arms extending in front of the truck and a pair of rear arms extending behind it, and a seat is attracted by a pair of daystat cars when the truck is in a retracted position. is received by each pair of rear arms, and each front arm suctions the sheet placed on each relay unit in advance. When the truck reaches the forward position by moving the truck, the sheet on each front arm is supplied to the sheet forming device. and placing the seat of the rear arm on the relay unit,
This allows two sheets to be fed at the same time.

Next, embodiments of the present invention will be described with reference to the drawings. 1 to 3 show a preferred embodiment of the present invention. In the figures, 1 is a transport unit including a trolley 2, and the trolley 2 is connected to a guide rail by means of an appropriate number of wheels attached thereto. 1a
is reciprocated along the The feeding speed varies depending on the capacity of the sheet forming apparatus P on one side, but in the case of high-speed forming, it is approximately 1 to 1.5 seconds.
Since the transport unit 1 itself is well known, its description will be omitted. Further, on the other side of the conveying unit 1, a de-stacker 3 is arranged which suctions the sheets A stacked thereunder one by one using an appropriate number of suction cups 4. 5
is a cylinder for vertical movement of the suction cup 4. As described below, this device has a pair of day stackers 3 to feed two sheets at the same time.
will be provided. Reference numeral 6 denotes a support stand for the laminated sheets, and there is a pair of support stands 6. When there are no more sheets on it, the sheet stack is placed on the pedestal 7 adjacent to the support stand 6 by a stacker or the like, and the sheet stack is moved onto the support stand 6 from there.

In the sheet feeding device according to the present invention, a pair of cantilevered front arms 10 and a pair of rear arms 20 are respectively attached to a truck 2, and each front arm 10a, 10b is located at the front of the truck 2, that is, at the forming device P.
It is provided with a suitable number of suction cups 11, each extending to the side of the sheet and sucking the sheet by means of a vacuum. Also,
Each rear arm 20a, 20b extends rearwardly of the truck 2 and is likewise provided with a suitable number of vacuum suction cups 21. The rear arm 20 receives the sheet that is sucked up by the suction cup 4 of the corresponding daystat car 3 when the trolley 2 is in the backward position, and when the sheet is delivered, the rear arm 20 receives an upward bending force. Therefore, in order to prevent the rear arm from deflecting, a receiving member 22 is provided at an appropriate position on each rear arm, preferably near directly above its free end, so that when the rear arm 20 is deflected upward, it comes into contact with the receiving member 22. ing. Such a receiving member 22 is attached to a fixed member 23 such as a frame or frame.

As shown in FIG. 2, each front arm 10 and each rear arm 20 are connected to a guide rail 1.
It is preferable that it be parallel to a, but it does not necessarily have to be parallel. moreover,
Preferably, one front arm 10a and one rear arm 20a are provided on one side of the truck 2, and the other front arm 10b and the other rear arm 20b are provided on the other side of the truck 2 to maintain good balance. There is. A relay unit 8 serving as a centering portion is installed at a suitable position below the transport unit 1, and this relay unit 8 is pivoted up and down about one end 8a as a fulcrum. A cylinder 9 or the like is provided at the other end of the relay unit 8, by which the pivoting movement is effected. On the top surface of this relay unit 8, there is usually a
A large number of rollers 8c are installed, and the sheet placed thereon is lowered by the rear arm 20 toward the tip, and is stopped and positioned by a stopper 8b at the tip. This relay unit 8 is also well known.

Although not shown in the drawings, this apparatus includes an appropriate sensing device and control system in order to sequentially operate the transport unit 1, destacker 3, and relay unit 8 at predetermined timing. As shown in FIGS. 2 and 4, each rear arm 2
0 preferably consists of a plurality of elongated hollow members 24, in which case the legs 3a of the day stacker equipped with a suction cup 4 at the lower end also consist of a plurality of legs 3.
a is arranged between the hollow members 24. The front arm 10 may also be constructed from a plurality of elongated hollow members. When the rear arm is composed of a plurality of elongated members 24, it is preferable to provide a receiving member 22 on each member 24 as shown in FIG. 4, but it is not necessary to provide it on all members 24. For example, it may be provided for appropriately selected members 24. Further, the receiving member 22 may be provided so as to abut near the tip of the rear arm 20 or at an intermediate position depending on the case.

Next, to explain the operation, with the trolley 2 in the retreat position, the suction cups 4 of each daystat car 3 descend onto the sheets A stacked on each support stand 6 in advance, and suck one sheet each. When the raised seat comes into contact with each rear arm 20, the suction cup 21 of each rear arm
At the same time, the suction action of the suction cup 4 stops, and the sheet is delivered to each rear arm 20. At that time, when the seat raised by the day stats car 3 contacts the rear arm 20 and the rear arm bends slightly upward, the rear arm 20 contacts the receiving member 22 and therefore does not bend significantly, so the suction cup 21 of each rear arm It adheres closely to the surface of the sheet and can be properly suctioned. Note that while the sheet is being transferred from the daystat car 3 to the rear arm 20 in this way, each relay unit 8
The cylinder 9 operates to pivot the relay unit 8 upward about the fulcrum 8a, the suction cup 11 of each front arm 10 sucks the sheet placed thereon, and then the cylinder 9 operates to pivot the relay unit 8 upward. 8 pivots downward to return to its original state.

When the seat is attracted to each rear arm 20 and each front arm 10 in this way, the truck 2 moves forward, and when it stops at a predetermined forward position as shown by the imaginary lines in FIGS. 1 and 2, each arm The suction action of the suction cups 11 and 21 is stopped, the respective sheets are released, and the pair of sheets supported by the pair of front arms 10 are respectively placed at predetermined positions of the corresponding sheet forming apparatus, and the sheets of each rear arm are placed. is placed on the corresponding relay unit 8, slides on a roller on its upper surface, is stopped by a stopper 8b, and is installed at a predetermined position on the relay unit 8. When each arm 10, 20 of the truck 10 releases the seat, the truck 10 returns to its original retracted position and repeats the above operation.

Note that in the above example, two sheets are fed into the forming apparatus at the same time, but the front arm 10a and the rear arm 20 on one side
It may also be used to feed one sheet by operating only a. In some cases, it is also possible to transport one large sheet A' using the front arm 10 and rear arm 20 on both sides, as shown in FIG. Therefore, three methods can be used, and the system is highly versatile. In such a case, it is preferable to use twin day stackers as the pair of day stackers 3, as shown in FIG. 26 is connected to a clutch 27 via a shaft 28. In this case, the clutch can be turned off to operate the left and right day stackers individually, and the clutch can be turned on to operate them synchronously.

As described above, according to the present invention, two sheets can be fed into the forming device at the same time by one conveyance unit, and since it is a one-step system, the mechanism is simple and the operation is easy. It will be done. In addition,
In the conventional device as shown in FIG. 7, a magnet 32 is installed inside a truck 30 equipped with a front arm and an endless belt 31 juxtaposed thereto, and the sheet is attracted by the magnet through the belt, and the sheet is attracted to the magnet as described above. However, the present invention does not operate against such force, and operates extremely smoothly. Furthermore, since the bending of each rear arm 20 is prevented by the receiving member 22, the rear arm can be made as light as possible, and the mass that moves together with the truck can be reduced, so there is less influence of inertia and high-speed transportation. suitable for

Therefore, two sheets can be fed into the forming apparatus at the same time using a simple mechanism, and the operation is smooth, making it suitable for high-speed conveyance. Furthermore, it is possible to convey a single sheet or a single large sheet, making it highly versatile. Moreover, it can contribute to reducing equipment costs.

[Brief explanation of drawings]

FIG. 1 is a front view of the sheet feeding device according to the present invention, FIG. 2 is a plan view thereof, FIG. 3 is an end view, and FIG.
5 is a plan view showing an alternative use of the apparatus of the present invention; FIG. 6 is an elevational view of a portion of the preferred embodiment; FIG. 7 is a conventional sheet feeding apparatus. FIG. In the diagram, 2...Dolly, 3...Daystats car, 8
...Relay unit, 10...Front arm, 1
1...Front arm suction cup, 20...Rear arm, 21...Rear arm suction cup, 22...Receiving member, 24...Rear arm member.

Claims (1)

[Claims for Utility Model Registration] (1) A truck that reciprocates on a guide rail, a pair of cantilevered front arms each extending forward from the truck and each equipped with a vacuum suction cup, and a pair of rear arms extending rearward and equipped with vacuum suction cups; a pair of daystat cars that suck and deliver sheets to each of the rear arms; and a pair of daystats cars that suck and deliver sheets to each of the rear arms; A sheet feeding device including a receiving member that comes into contact with the rear arm and a relay unit that receives the sheet that has been attracted to the rear arm in the forward position of the truck. (2) Utility Model Registration The sheet feeding device according to claim 1, wherein each of the rear arms includes a plurality of hollow members, and each of the hollow members is provided with the receiving member. (3) Utility Model Registration The sheet feeding device according to claim 1, wherein each of the front arms and each of the rear arms is provided parallel to the guide rail. (4) Utility Model Registration The apparatus according to claim 1, wherein the front arm and the rear arm are located on both sides of the truck.