RU1810895C - Tape drive of drum graph plotter - Google Patents

Abstract

The invention relates to automation and computer technology and can be used in drum plotters, where it is required to carry out the movement of a wide paper tape having edge perforation. The purpose of the invention is to increase the reliability of the tape mechanism by eliminating the swelling of the paper tape when the tape shaft rotates . The goal is achieved in that the clamp element 7 is made in the form of a block, the inner surface of which has a concavity 8 with a radius matching the radius of the rubberized tape shaft, and the groove 9c whose depth and width correspond to the dimensions of the protrusions on the rubberized tape shaft, and the side surface of the block has a mounting hole 10 offset from the axis of symmetry. This embodiment of the pressing element eliminates swelling, creeping, skewing, sticking of the paper tape at the perforation sites during its movement. 1 C.p. f-ls, 2 ill. m yo

Description

The invention relates to automation and computer technology and can be used to convert digital information to graphic in computer-aided design (CAD) systems.

The purpose of the invention is to increase the reliability of the mechanism by eliminating the swelling of the paper tape during rotation of the tape shaft.

The invention is illustrated by the drawings of Figures 1 and 2 (a, b, c).

In FIG. 1 shows a construction for an inventive tape drive for a drum plotter. It contains a rubberized tape drive shaft 1 with protrusions 2 at the edges for engagement with edge perforation of the paper tape 3, levers 4, springs 5, connecting each pair of levers, mounting axles 6, clamp elements 7 in the form of a fluoroplastic block. Four pairs of elements 4, 6, 7 and one element 5 constitute a clamp assembly (two clamp assemblies are located at the two ends of the rubberized tape drive shaft). To illustrate the design and configuration of the clamping element 7 in the form of a block, Fig. 2 shows its drawing, the inner surface of the block has a concavity 8 with a radius matching the radius of the shaft 1; and a groove 9, the depth and width of which correspond to the dimensions of the protrusions on the shaft 1,

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the side surface has a mounting hole 10.

The tape drive mechanism for the drum plotter operates as follows (Fig. 1).

Initially, the paper tape 3 is charged. The operation of the tape drive mechanism in the fopotransformer is controlled by electronic units (including computers). In this case, digital information is converted into graphic. Information is recorded on the tape 3 by means of a writing unit (not shown in Fig. 1) moving along the axis of the shaft 1, and by alternately moving the tape 3 in both directions. When the tape 3 moves, the protrusions 2 of the shaft 1 together with the holes of the tape 3 gradually enter and exit the grooves of the four blocks 7. In this case, the position of the holes of the tape 3 on the protrusions 2 of the shaft 1 is clearly fixed and any displacement of the holes relative to the protrusions is excluded. Using springs 5, the blocks 7 are tightly pressed against the shaft 1. To preserve the paper tape 3 when it moves in both directions, the material from which the blocks 7 are made must have a low friction coefficient. On the other hand, the pads 7 must be durable, for which the material from which they are made must have high wear resistance. For these two reasons, the pads 7 are made of fluoroplastic. In addition, polyamide, polycarbonate or other plastics may be used as such a material.

Technical and economic efficiency of the claimed device is as follows.

Expansion, slipping, skewing, creasing of the paper tape at the perforation sites during its movement are excluded, which completely eliminates the marriage and reduces the time for the production of a paper graphic information carrier.

Eliminated the loss of expensive computer time, electricity and paper associated with the need to re-record or re-record the same information.

The working area of the drum plotter is expanded, which is significant when releasing large sets of design documentation and complex drawings.

FORMULA

Claims (2)

1. The tape drive mechanism for the drum plotter, comprising a rubberized tape drive shaft with protrusions at the edges for engagement with edge perforation of the paper tape and two pressure assemblies located at the two ends of the rubberized tape drive shaft, each of which consists of two levers installed. on both sides of the rubberized tape shaft and connected by a spring to each other, rotatable with one end fixed in the plotter housing, the installation axis fixed from the other end, n and on which the clamp element is planted, with the aim of increasing reliability of the mechanism due to the exclusion of bloating of the paper tape during rotation of the rubberized tape drive shaft, the clamping element is made in the form of a block, the inner surface of which has a concavity with a radius matching the radius rubberized tape drive shaft, and a groove whose depth and width correspond to the size of the protrusions on the rubberized the tape shaft, and the side surface of the shoe has a mounting hole offset relative to the axis of symmetry, the mounting axis is located above the axis of rotation of the rubberized tape shaft, and the shoe is placed on its mounting axis with its lower part. 2. The mechanism according to claim 1, wherein the block is made of fluoroplastic.