JPH03398Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic writing and drafting device having a driven holding arm that receives a tubular recording device at its free end, and more particularly relates to an axially long arm supported by a drafting head. The present invention relates to an automatic writing and drafting device of the type having an axially elongated retaining arm for retaining a writing instrument at its end, typically beyond a running rail for a drafting head.

In devices of this type, it is often necessary to exchange the tubular recording device held at the free end of the holding arm with another tubular recording device of a different line width in order to draw lines of different line widths on the drawing. In this case, usually remove the tubular recording device screwed into the screw hole of the holding arm,
Next, another tubular recording device with a different wire width is screwed into the screw hole. In order to perform the above-mentioned replacement without damaging the writing/drawing device, the holding arm has a long structure in the axial direction and has great strength because it holds a writing instrument, such as a drafting strip pen, at its tip. and must be particularly securely attached to the device. Further, when the holding arm is screwed onto the tubular recording device, the holding arm is pressed down to prevent the front end of the recording tube piece of the screwed on tubular recording device from coming into contact with the drawing and causing stains on the drawing. , it is necessary to reliably lock the holding arm at a predetermined height position.

An object of the present invention is to configure a writing/drawing device so that the tubular recording device can be replaced easily and quickly.

This purpose is to provide an automatic writing and drafting device having an axially long holding arm which receives a tubular recording device at its free end and is driven; It has a support-side inner part 1 that can be removably engaged with the outer end part via a plug-in engagement mechanism, and the plug-in engagement mechanism connects the outer end part 2 and the inner part 1. An insertion guide part 4 disposed on one of the parts, and an insertion guide part 4 disposed on the other part that slides into engagement with the insertion guide part 4 in the axial direction and is positioned perpendicular to the axis by the insertion guide part 4. and a locking mechanism for locking the outer end portion 2 and the inner portion 1 in the axial direction, the locking mechanism extending in the axial direction and having an elastic a hook element 5 which is deformable or displaceable; and a sliding engagement of both parts 1, 2 of the holding arm, which are arranged outside the range of sliding engagement of the insertion part and the insertion guide part, corresponding to the hook element; and a locking surface 8 which is engaged by the hook 6 of the hook element 5 via the writing and drawing device.

That is, in the device according to the present invention, the holding arm that receives the tubular recording device consists of two parts that can be separated from each other, and when replacing the tubular recording device, the outer end portion is separated from the arm support side (inner) portion. After separation, the retained tubular recording device may be removed from the separated outer end portions and another tubular recording device inserted, and the outer end portions may be reconnected to the inner portion of the retaining arm.
Thus, the operation of removing a tubular recording device from its holder and the insertion of another tubular recording device into the holder takes place completely independently of the holding arm fixed to the device, so that the receiving part of the holding arm is under no load. There is no risk of staining the drawing.

By employing an arrangement in which both parts of the retaining arm are engaged by a bayonet engagement mechanism comprising an elastically deformable or displaceable locking element,
Separation and engagement operations of both parts become particularly easy. In this case, the locking element is preferably provided at the outer end portion. Using this type of engagement mechanism, the outer end section can be pulled out of the inner section and inserted into the inner section of the holding arm again after the tubular recording device has been replaced, without the use of special tools.

Embodiments of the invention are set out in the dependent claims.

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

The holding arm shown in FIG. 1 consists of an inner part 1 and an outer end part 2. The holding arm shown in FIG. The inner part 1 is fixed in the usual manner (not shown) to the writing and drafting device and is connected to a drive mechanism. The free end of the part 2 is provided with a screw hole 3 into which a tubular recording device can be screwed.

At the end of part 2 facing the screw hole 3, there is a protruding part (insertion part) of part 1 that is partially open downward.
A receiving groove 4 (insertion guide portion) into which the holder 7 can be inserted is provided. The width and thickness of the protrusion 7 are adjusted so that the protrusion 7 fits into the receiving groove 4 as accurately as possible, that is, when the protrusion 7 is inserted into the groove 4, the parts 1, 2
but do not rotate or tilt relative to each other.
It's selected.

In order to lock both parts 1, 2 in the mutually inserted position, a hook element is provided on the upper surface of part 2, which extends in the longitudinal direction of parts 1, 2 in the inserted state and can be elastically deformed and pivoted upward. 5 is formed. For this purpose, the part 2 may be made of synthetic resin, for example. At the free end of the hook element 5, a downwardly directed hook 6 is provided. Therefore, when the protrusion 7 is inserted into the receiving groove 4, the hook 6 comes into contact with the protrusion 7 and the hook element 5 is elastically pivoted upward.
As a result, the outwardly facing surface following the protrusion 7 is the part 2.
comes into contact with the end face of In this state, the hook 6 is
Since it no longer rests on part 1 and engages the opposite surface 8 of part 1, the hook element 5 descends again. In this position, on the one hand, the surface following the projection 7 rests against the end face of the part 2, and on the other hand, the surface following the projection 7 rests on the end face of the part 2
engages the facing surface 8, so that the parts 1, 2 can no longer move relative to each other in the axial direction.

When parts 1, 2 are to be separated, the hook element 5 can be raised to disengage the hook 6 from the opposing surface 8, thus separating part 2 from part 1 of the holding arm and removing the tubular shape. Recording devices can be replaced.

The holding arm shown in FIG. 2 is a comparative example for contrasting with the holding arm of the embodiment of FIG. , 12. The free end of the part 12 is provided with a threaded hole 13 for receiving a tubular recording device, and the opposite end is provided with a receiving groove 14 for the projection 17 of the part 10. In the case of the holding arm according to FIG. 2, in contrast to the embodiment according to FIG. 1, the opposite short walls of the receiving groove 14 are provided with a semicircular projection 15 approximately in the center of said receiving groove when viewed in the axial direction. On the other hand, locking recesses 18 that match the shape of the projection 15 and face each other are provided on the side surface of the projection 17.

When the projection 17 is introduced into the receiving groove 14, depending on the material of the part 12 of the holding arm, the projection 15 is elastically deformed or the receiving groove 14 is expanded laterally, so that the projection 15 is free from the engagement. It reaches the area of the stop recess 18 and engages in this recess. In this state, the parts 10, 12 of the holding arm are axially fixedly connected to each other.

To separate section 12 from section 10, it is only necessary to pull section 12 apart. In this case, protrusion 15
Alternatively, the receiving groove 14 is deformed as described above.

The holding arm shown in FIG. 3 is a comparative example for comparison with the holding arm of the automatic filling/drafting apparatus according to the embodiment of the present invention shown in FIG. That is, the free end of the portion 22 is provided with a screw hole 23 for receiving the tubular recording device, and the opposite side is provided with a U-shaped receiving groove 24 for the protrusion 27 of the portion 24. Within the receiving groove 24 is a projection 27 fixed to the portion 22.
Extending perpendicularly to the longitudinal direction of the sections 21, 22 is a surface 25 which engages a transverse opening 28 of corresponding size. A sleeve 29 is provided in the portion 21 so as to be slidable in the longitudinal direction. sleeve 2
The inner opening 9 is designed in such a way that the sleeve can be fitted snugly into the end region of the part 22 provided with the pin 25.

When engaging the parts 21, 22, the pin 25 is inserted from above (as in FIG. 3) into the lateral opening 28 so that the side surface of the projection 27 abuts the inner surface of the leg of the receiving groove 24. In this way, relative pivoting movements and relative movements in the longitudinal direction of the parts 21, 22 are reliably prevented. To ensure the engagement thus formed, a sleeve 29 is fitted over the end of the portion 22 provided with the pin 25. In this state, the sleeve 29
surrounds the engagement area, ie prevents separation of parts 21, 22. By correspondingly shifting the sleeve 29, the parts can be separated.

In the configuration of the present invention, the axially long holding arm of the automatic writing/drafting device is inserted into two parts that can be attached and detached via an engagement mechanism, namely, the outer end part that holds the recording tool, and the outer end part that is supported by the drafting head. The insertion engagement mechanism is divided into an insertion guide portion, and an insertion portion that slides into engagement with the insertion guide portion and whose position is defined by the insertion guide portion in a direction perpendicular to the axis. and an axial locking mechanism consisting of an axially elongated hook element and a locking surface that engages with the hook of the hook element via a sliding engagement, whereby both retaining arms The sliding engagement in the axial direction allows engagement without any movement in the direction perpendicular to the shaft, eliminating the risk of ink falling from the writing instrument when replacing the writing instrument. The engagement of the retaining arm allows for an extremely rigid structural engagement in the direction perpendicular to the axis, so it has a long retaining arm that makes it easy to hold the retaining arm at a predetermined height and position it accurately on the drawing. It has become possible to provide automatic entry/drafting equipment.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a holding arm consisting of two parts, and FIG. 2 is a comparative example for comparison with the holding arm of FIG. 1, and FIG. A similar perspective view, FIG. 3, is a perspective view of a holding arm of an automatic writing and drafting device of a comparative example for comparison with the holding arms of FIGS. 1 and 2 according to the embodiment of the present invention. 1, 2, 10, 12, 21, 22... Holding arm portion, 4, 14, 24... Receiving groove, 5, 1
5, 25...Lock element.

Claims (1)

[Scope of Claim for Utility Model Registration] In an automatic writing/drawing device having an axially long holding arm that receives and drives a tubular recording device at its free end, the outer end of the free end side where the holding arm holds the recording device. and a support-side inner portion 1 that is removably engageable with the outer end portion via a plug-in engagement mechanism, and the plug-in engagement mechanism is configured to engage the outer end portion 2 and an insertion guide portion 4 disposed on one of the inner portions 1, and an insertion guide portion 4 disposed on the other portion that slides into engagement with the insertion guide portion 4 in the axial direction and is perpendicular to the axis by the insertion guide portion. an insertion portion 7 whose position is defined in the direction; and a locking mechanism for locking the outer end portion 2 and the inner portion 1 in the axial direction; an elongated and elastically deformable or displaceable hook element 5 and correspondingly arranged outside the range of the sliding engagement of the plug-in part and the plug-in guide part of the two parts 1, 2 of the holding arm; A writing/drafting device comprising: a locking surface 8 that is engaged by the hook 6 of the hook element 5 through sliding engagement.