JPH0225359B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is carried out in a drafting head and is lowered from a raised rest position in which the tip of the recording instrument is located above the drawing board to an operating position in which the tip of the recording instrument is in contact with the drawing board. at least one recording device that can be used as a recording device; and at least one sealing element, the slider being moved by a drive mechanism into a position corresponding to a rest position of the recording device;
It is movable between a position corresponding to the position of the sealing element that has been moved laterally, and the recording device can be raised from the rest position to an intermediate position in which the recording device tip is located above the sealing element. , relates to an automatic drafting device of the type in which the sealing element can be lowered from an intermediate position into an operating position when it is moved laterally.

In known drafting devices of this type, the movement of the recording instrument between each position is controlled by three levers, namely one lever engaged with one end on the recording instrument and one end engaged on a slider with a sealing element. This is done by means of a lever mechanism consisting of another lever that is fitted together. The lever is arranged such that when the lever engaging the slider is moved by the drive mechanism, various movements are carried out, for example when the recording device is raised from a rest position to an intermediate position, and then
pivotably pivoted so that the slider is moved laterally, thus the sealing element is moved out of the range of the recording device, and the recording device is then lowered into the working position;
They are interconnected.

Although the operation of this known device is in fact very reliable and satisfactory, it has the disadvantage that it has a relatively large number of components and therefore has very high production and maintenance costs.

The object of the invention is to create an automatic drafting device of simple construction, which allows the recording instrument to be raised from a sealed rest position, the sealing element to be moved laterally, and then the recording instrument to be lowered onto the drawing board. It is in.

This purpose is achieved in a drafting device of the type mentioned at the outset, in which, according to the invention, the drive mechanism 20, 21 is connected to the actuating element 11 with a guide cam, which guides the recording device 1 into the rest position. a short diagonally rising first portion 14 connectable to a recording device or a recording device receiving guide of a drafting head for movement between an intermediate position and an operating position, and a horizontal second portion 15 adjoining the first portion; It includes at least a long third part 66 that descends obliquely following the second part, and a horizontal fourth part 17 that follows the third part, and the first part 14 and the second part 15 hold the recording device at an intermediate position. said third part 16
and a fourth part 17 serves to lower the recording device into the operating position, the operating element 11 extending in the direction of movement of the drive mechanisms 20, 21 and having a length into which a pin 19 fixed to the slider 8 is inserted. When the first and second portions 14, 15 of the guide cam, which has a hole or a long groove 12 and moves and holds the recording device 1 in an intermediate position, come into contact with the recording device or the guide, the slider 8 is moved laterally. one end of the elongated hole or elongated groove 12 placed at a position corresponding to the operating position of the recording device 1 engages with the pin 19;
When said third and second parts 16, 15 of the guide cam, which move the recording device 1 from the operating position to the intermediate position, are at least partially engaged with the recording device 1 or the guide, the slider 8 is returned and the recording device is moved. This is achieved by the feature that the other end of the elongated hole or elongated groove 12 placed in a position corresponding to the rest position engages with the pin 19.

A drive mechanism moves the actuating element such that the first or second portion of the guide cam engages the recording device or the recording device receiving guide to raise the recording device from the rest position to the intermediate position or to hold the recording device in the intermediate position. When,
One end of the elongated hole or slot is engaged with the pin, and the slider is moved to a position corresponding to the actuating position of the recording device through movement of the actuating element, and the driving element moves the actuating element in the opposite direction. , so that when the third or second portion of the guide cam raises the recording device from the operating position toward the intermediate position or holds it at the intermediate position, the other end of the elongated hole or elongated groove engages with the pin. and returns the slider to a position corresponding to the rest position of the recording device through movement of the actuating element.

The invention will be explained in more detail below with reference to schematic drawings showing exemplary embodiments.

In the illustrated embodiment, a tubular recording device 1 has a tubular section 2 and a cylindrical section 4 that serves as a guide.
is held in a diagrammatically shown drafting head 3.

In the rest position of the recording device 1 shown in FIG. 1, the tubular part 2 rests on a sealing element 9 of elastic material, effectively sealing and preventing the ink from drying out. The sealing element 9 forms part of the slider 8 which is held in a manner not shown.

Actuation magnet (drive mechanism) 21 with push rod 20
is fixed above the sealing element 9 and to the side of the recording device 1, and the outer end of the push rod 20 is connected via a pin 18 to the plate-like actuating element 11. This actuating element 11 extends laterally of the drafting head 3, is fixed to the recording device, and extends in the radial direction, through a slit (not shown) whose outer end extends in the axial direction. A pin 10 protruding from the head 3 is adapted to rest on a guide cam of the actuating element 11. This guide cam has a horizontal portion 13
and a portion 14 that rises diagonally from the horizontal portion.
, a horizontal portion 15 following the upper end of the portion 14 , a portion 16 that descends obliquely following the portion 15 , and a portion 16 .
It consists of a horizontal portion 17 that continues to the lower end of. In FIG. 1, the pin 10 rests on the horizontal portion 13, and the tip of the tubular portion (nib) 2 is
It is in sealing engagement with the sealing element 9.

The actuating element 11 furthermore has a slot 12 extending in the longitudinal direction of the push rod 20, into which a pin 19 fixed to the slide 8 projects. In the position shown in FIG.
It is located at the left end of 2.

The actuating element 11 is guided horizontally in a manner not shown and can be moved back and forth in the axial direction of the push rod 20.

In FIG. 1, the recording device is in the rest position, so that the sealing element 9 seals the tip of the tubular part 2, as already described. When setting the recording device 1 to the operating position, the operating magnet 21 is activated and the push rod 20 is moved to the left. The actuating element 11 is thus also moved to the left, causing the pin 10 to slide on the guide cam from part 14 to part 15, so that the recording device
From the position of FIG. 1, the position of FIG. 2 is reached, in which the tubular part 2 has been pulled away from the sealing element 9. When moving the actuating element 11 to the left as described above, the slit 12 also moves relative to the pin 19, so that the pin 19 reaches the right end of the slit 12 (FIG. 2). Therefore,
When the push rod 20 is moved further to the left, the damper 8, which supports the pin 19 and the sealing element 9, is moved to the left and reaches the position of FIG. 3. During this movement, the pin 10 connected to the recording device 1 also moves from the portion 15 of the guide cam through the portion 16 to the portion 17, so that the recording device 1 descends and reaches the operating position.

For example, when raising the recording device from the operating position to interrupt line drawing, the actuating element 11 is moved slightly to the right by the actuating magnet 21 to move the pin 10 along the guide cam from part 17 to part 16. and, if necessary, move it up to section 15 (FIG. 4). In this case, it is not necessary to move the sealing element, but only to raise and lower the tubular part.

When returning the recording device to the rest position, the recording device is first raised to an intermediate position as shown in FIG.
In the above position, the pin 19 is again inserted into the slit 12.
has reached the left end of the tubular part 2, so if the push rod 20 is moved further to the right, the sealing element 9 will again close the tubular part 2.
, the pin 10 is moved from part 15 of the guide cam back through part 14 to part 13;
The recording device then returns to the sealed rest position of FIG.

Due to the configuration of the invention, the drafting device of the invention allows the raising and lowering of the recording device and the movement of the slider with the sealing element to be carried out via a single actuating element with a guide cam, so that a plurality of levers can be used. Compared to conventional drawing devices that use a lever mechanism, the drawing device has fewer components and has a simpler structure.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of the recording tool held in the drafting head in a sealed rest state, Fig. 2 is a schematic diagram similar to Fig. 1 of the recording tool in the raised intermediate position, and Fig. 3 is a schematic diagram of the recording tool in the drafting position. FIG. 4 is a schematic representation similar to FIGS. 1-3 of the recording device in an intermediate position, except that the sealing element is oriented laterally relative to the tubular portion. (in a moved state). DESCRIPTION OF SYMBOLS 1... Recording tool, 2... Tubular part, 3... Drafting head, 8... Slider, 9... Sealing element, 10...
...Recording tool pin, 11... Operating element, 12... Slit, 13-17... Guide cam, 19... Slider pin, 20; 21... Drive mechanism.

Claims (1)

[Scope of Claims] 1. At least one at least one device which is held in a drafting head and can be lowered from a raised rest position in which the tip of the recording instrument is located above the drawing board to an operating position in which the tip of the recording instrument is in contact with the drawing board. It forms part of one recording device and a slider that is movable laterally, and is in sealing contact with the tip of the recording device in the rest position of the recording device, and is moved laterally with respect to the recording device in the operating position of the recording device. and a sealing element, the slider being moved by a drive mechanism into a position corresponding to the rest position of the recording device; and
The recording device is movable between a position corresponding to the position of the sealing element that has been moved laterally, and the recording device can be raised from the rest position to an intermediate position in which the tip of the recording device is located above the sealing element. In an automatic drafting device of the type that can be lowered from an intermediate position to an operating position when the sealing element is moved laterally, the drive mechanism is connected to the operating element with a guide cam, the guide The cam has a short diagonally rising first section that can be connected to a recording device or a recording device receiving guide of a drafting head for moving the recording device between a rest position, an intermediate position and an activated position, and a horizontal section that follows the first section. a second part, a long third part that descends obliquely following the second part, and a fourth horizontal part following the third part, and the first part and the second part hold a recording device. said third and fourth parts serve to raise the recording device to the intermediate position, said third and fourth parts serve to lower the recording device to the operating position, the actuating element extending in the direction of movement of the drive mechanism and fixed to the slider; The guide cam has an elongated hole or a long groove into which a pin is inserted, and when the first and second portions of the guide cam that move and hold the recording instrument in an intermediate position come into contact with the recording instrument or the guide, the slider is moved laterally. the third and second portions of the guide cam, one end of which is an elongated hole or slot located at a position corresponding to the operating position of the recording device, engages with the pin to move the recording device from the operating position to the intermediate position; is characterized in that when the slider is at least partially engaged with the recording device or the guide, the other end of the elongated hole or slot that returns the slider to a position corresponding to the rest position of the recording device engages with the pin. Drafting equipment. 2. Drafting device according to claim 1, characterized in that the actuation element 11 moves perpendicularly to the direction of movement of the recording device 1 between the rest position and the actuation position. 3. Drafting device according to claim 1 or 2, characterized in that the drive mechanism consists of an actuating magnet with a push rod 20 connected to the actuating element 11.