SU749777A1 - Slit-type feeder of sheet materials - Google Patents

Description

(54) SLOTABLE SAMONACLADE FOR SHEET MATERIAL

one

The invention relates to the printing industry, namely to the feeders of machines for printing on rigid sheet materials.

A slotted sheet feeder for a sheet material is known, comprising a magazine, a slam-cutter mounted on the front wall of the magazine, a lifting means for supporting the foot and a pusher mounted on the carriage 1.

The disadvantage of this feeder is the unreliability of its operation when feeding the warped sheets, since the rear edge of the warped sheet may not get on the pusher tooth, and the sheet will not be removed from the feeder. In addition, the location of the front edge of the sheet above the exit slit is possible, as well as rubbing the sheet with the pusher during its withdrawal from the magazine.

The purpose of the invention is to increase the reliability of the feeder.

This goal is achieved by the fact that a slot feeder for sheet material containing a magazine, a cutter mounted on the front wall of the magazine, a lifting means for supporting the foot and a pusher mounted on the carriage.

has a hook grip for a sheet with a roller mounted freely on it, mounted on a carriage behind a pusher, while the means for supporting the foot contains a traverse with three fingers rigidly mounted on it forming the shape of a triangle in plan. In addition, the foot support means has rollers freely mounted under the slam-shut.

FIG. 1 schematically shows the proposed samonaklad with the extreme position of the pusher and the rear wall of the store,

10 longitudinal section; in fig. 2 is the same, but with an intermediate position of the pusher, when the sheet is pulled out by a hook-shaped grip; in fig. 3 shows section A-A in FIG. one; in fig. 4 shows section A-A in FIG. 1, option

15 performing a feeder.

The slotted sheet feeder for sheet material comprises a magazine 1 with front 2 and rear 3 walls, a lifting means 4 for supporting the foot 5 and a discharge device 6.

A cutter 7 is mounted on the front wall 2 of the magazine 1, having the possibility of vertical movement in the guides 8, as well as a spring 9 serving to press the shutter 7 to its lowest position, and a screw mechanism 10 for setting the lowest position, the shutoff device. Lifting the tool 4 contains three fingers 11, rigidly mounted on the traverse 12 and forming in plan the shape of a triangle. The guides 13 serve for vertical movement of the crosspiece 12. The output device 6 consists of a carriage 14 having the possibility of horizontal movement along the guide 15 and a fixed cam 16. In the carriage 14, a follower 18 with a tooth 19 is mounted in the guides 17, a bearing pad 20 for a sheet, an adjustable stop 21, a spring 22 and a roller 23. Behind the pusher in the carriage 14, a hook-shaped gripper 25 is mounted in the guides 24 with a gap 26, a position-adjustable stop 27- and a spring 28. A freely rotating alarm is mounted on the gripper 25 There is a wounding roller 29, with the upper roller forming above the grip. The upper part of the hook grip is set at the level of the bottom sheet of the foot, but below the upper level of the tooth 19 of the pusher 18, by means of the adjusting stop 27. In the magazine 1, the means for supporting the foot 5 consists of two supports 30, made, for example, in the form of freely rotating rollers. The supports are located under the cutters 7, the exit slit 31 is formed with them. The third support of the bottom sheet is the platform 20 on the pusher 18 in its rightmost position at the rear wall 3 of the magazine 1, as shown in FIG. 1 and FIG. 3. The two front pins 11 of the lifting means 4 are located in the immediate vicinity of the two supports 30, and the third is located near the rear wall 3 of the store 1 in the immediate vicinity of the platform 20 on the push rod 18 in its extreme right position (see Fig. one). A variant of the samonaclade is possible, when one of the three supports of the bottom sheet is installed 30 in the store 1 under the cutter 7, forming an exit slot with it, and the other two are two platforms 20 on the pusher 18 spaced apart, as shown in FIG. 4. Samonaklad works as follows. 1 stop 5 loaded into the magazine lays with its bottom sheet on two supports 30 at the outlet slit 31 and on the third support — a platform 20 on the pusher 18, which is in its extreme right position at the rear wall 3 of the magazine. The pins 11 of the lifting means 4 for supporting the foot are at this time either in the lower position or moving downwards so that their upper ends do not touch the sheet (see Fig. 1). Due to the fact that the bottom sheet lays only on the three indicated points (supports), its front edge is located at the exit slit 31, and the rear one - at the tooth 19 of the pusher 18, regardless of the shape and size of the sheet warping. If at the moment of loading the foot 5 into the magazine 1, the pusher is not in the extreme right position, then the bottom sheet of the foot rests on three other points — the upper ends of the fingers 11, which are in close proximity to the indicated supports. After the arrival of the pusher 18 to its extreme right position and lowering the crosspiece 12, the sheet rests on the supports. Thus, at the beginning of the movement of the pusher 18 from right to left (the beginning of the working stroke), the bottom sheet will necessarily be advanced by the tooth 19 of the pusher 18 into the exit slot. Since the cutter 7 is pressed by the spring 9 to its lower position, which determines the size of the exit slit 31, and can move in the guides 8, the output bottom sheet, the passage through the slit can lift the cutter 7 by the amount of sheet behavior. After the passage of the behavioral part of the sheet, the cut-off 7 is lowered, and the remaining sheets of the foot are separated from the output. Jamming the output sheet in the exit slit 31 will not, despite its behavior. The pusher 18, continuing horizontal movement from right to left, together with the carriage 14 on which it is mounted, begins to interact with the roller 23 with the inclined surface of the fixed cam 16. At the same time, the pusher 18 is lowered in the guides 17 vertically downwards horizontally moving carriage 14. As a result of this movement, the pusher, its tooth 19, necessarily "loses the trailing edge of the ejected sheet, which, under the action of its own weight of the sheet and the force of friction on the pusher tooth, also lowers c and falls into the jaw 26 of the hook-shaped gripper 25, which continues in place, together with the carriage 14, a horizontal movement from right to left. Further movement of the sheet through the exit slot 31 occurs under the action of the gripper 25 (as shown in FIG. 2) without “losing the sheet. Since the gripper 25 is provided with a safety freely rotating roller 29, the latter (due to its positioning relative to the gripping surface) lifts the entire foot, rolls along the lower surface of the lead-through sheet without damaging it and facilitates the withdrawal of the lower sheet. After the sheet has been withdrawn, the yoke 12 rises. The new bottom sheet rests on three fingers 11. The carriage 14 with the pusher 18 and the hook-shaped gripper 25 makes a movement from left to right (idle) without touching the bottom surface of the new bottom sheet of the foot 5. The pusher 18, interacting with the cam 16, rises up, takes its right position at the rear wall 3 of the magazine 1. Traverse 12 with fingers 11 is lowered. Bottom sheet down

under the action of its own weight and the weight of the foot, it rests on three supports (20 and 30, as shown in Figs. 1, 3, 4), and the cycle of the feeder is repeated.

In the embodiment of the feeder (see Fig. 1 and Fig. 3), when one of the three oriop bottom sheets is installed in the magazine and forms a discharge slot with the cutter, and the other two are supporting pads on the pusher, the principle of design and operation is preserved. Moreover, each of the two bearing pads on the pusher should have a hook grip,

A special feature of the design of the feeder is that the bottom sheet in the store lies on three points - sheet supports. This always ensures that the leading edge of the sheet is inserted into the exit slit and the trailing edge engages with the pusher tooth. In addition, the forced “rubbing of a sheet by a tooth of a pusher with the subsequent interception of a sheet by a hook-shaped grip ensures the reliability of the sheet output.

Claims (2)

1. A slotting sheet feeder for sheet material containing a magazine, a cutter mounted on the front wall of the magazine, a lifting means for supporting the foot and a plunger mounted on a carriage, characterized in that it has a hook-like sheet grip with a roller mounted freely on it, mounted on a carriage behind a pusher, while the means for supporting the foot contains a traverse with three fingers rigidly mounted on it, forming a triangle shape in plan. 2. A slot feeder according to claim 1, characterized in that the means for supporting the foot has rollers freely mounted under the slam-shut. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 380573, cl. In 65 N 3/26, 1973. IS DO P // 20 II 30 ig.5 IQ / f // 7 (7; / 20 FigL