JP2541333Y2 - Stroke head of automatic drafting machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a lead core feeding means provided with a chuck body capable of feeding a lead core, and a lead tank for storing a lead core behind the lead core feeding means. And an image drawing head of an automatic drafting machine having the following.

[0002]

2. Description of the Related Art Japanese Unexamined Utility Model Publication No. Sho 54-142545 is known as an example of an image head for an automatic drafting machine.
More specifically, a lead feeder provided with the chuck 1 is disposed inside the outer shaft 7. The chuck 1
A lead tank (rear part 1C of the chuck 1) capable of storing a plurality of lead cores (preliminary lead) is connected to the rear of the head, and the lead is inserted smoothly into the connected part. It has an inclined surface (step portion 1A of chuck 1; generally about 120 degrees) so that it can be inserted into the hole.

In Japanese Utility Model Laid-Open Publication No. Sho 61-12795, a lead guide pipe having substantially the same diameter as the lead is disposed behind a ball chuck mechanism which is a lead lead feeding mechanism. A lead is inserted into the ball chuck mechanism.

[0004]

[Problems to be solved by the invention] Usually, automatic drafting machines
As described in FIG. 1 of Japanese Utility Model Application Laid-Open No. 54-142545, an automatic drafting machine was installed and used so as to be horizontal. However, in recent years, it has become preferable to use an automatic drafting machine at an angle of about 60 degrees in order to confirm written matter during drawing and to make it easier to confirm.

[0005] However, in the former of the prior art described above, when the automatic drafting machine is tilted, the image head also tilts, and as a result, an inclined surface is formed between the chuck and the core tank. The lead core cannot get over the inclined surface. Therefore, the second and subsequent lead cores may not be inserted into the chuck, and writing may not be possible.

In the latter case, even if the automatic drafting machine is tilted, the second lead can be inserted into the ball chuck mechanism, and the longer the lead guide pipe, the more lead leads are stored. Although it can be used, its length is limited and usually only two quartiles can be stored.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has a lead core feeding means provided with a chuck body capable of feeding a lead core in a shaft cylinder. And, an object head of an automatic drafting machine having a lead tank for storing lead in the back of the lead lead feeding means, while forming a rotating means on the inner wall of the barrel,
The outer wall of the core tank has an engaging step for engaging with a rotating means, and the lead tank is provided so as to be coaxial with a lead core supply hole formed at a rear end of the chuck body in the core tank. The gist is that the core tank holder having the core sliding groove is slidably disposed with respect to the shaft cylinder.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG.
Is a view when an image head is attached to the automatic drafting machine 101, and reference numeral 102 denotes an image head holder, and a knock portion 103 is provided from the rear end of the image head holder 102.
Is protruding. Also, from the side of the automatic drafting machine 101,
Two sets of arms 104, which hold the object head holder 102 and can move up and down, are arranged at appropriate intervals.
The contact member 10 is located at the rear end facing position of the knock portion 103.
5 are provided on the automatic drafting machine 101 at intervals.

Next, the image head will be described (see FIG. 2). A tip member 2 is screwed to the tip of the barrel 1. A slider spring 3 interposed between the tip member 2 and a ball chuck mechanism described later is urged forward by a slider spring 3 and is slidable on the inner surface of the tip member 2.
4 are arranged. A lead core holding member 5 made of synthetic rubber or the like is provided inside the slider-4 to hold the lead core lightly. The reference numeral 1a denotes an image head holder.
This is an engaging step formed so that the barrel 1 is always in a fixed direction with respect to 102 (when the automatic drafting machine is tilted, a lead core sliding groove 16 described later faces downward).

Reference numeral 6 denotes a ball chuck mechanism disposed in the holder 1 behind the slider-4. The ball chuck mechanism 6 includes a chuck body 7 having a front end divided into a plurality of parts, which can be freely opened and closed, and which can hold the lead core L when closed, and which has a lead core supply hole 7a formed at the rear end. A rotator 9 placed on a tray 8 on a plate formed on the outer surface of the head of the chuck body 7 and an inclined surface 10 capable of slidingly guiding the rotator 9 to close the chuck body 7 are formed. And a chuck spring 12 for urging the chuck body 7 rearward with respect to the chuck ring 11.

A lead tank 13 having a semi-circular lead core storage portion 13a is disposed behind the ball chuck mechanism 6 and inside the barrel 1. A lead tank 13 is provided on the outer wall of the lead tank 13. An engagement step 15 is formed to engage with the rotary cam groove 14 formed on the inner wall of the shaft cylinder. Inside the lead tank 13, a lead tank holder 17 having a lead lead sliding groove 16 formed coaxially with the axis of a lead lead supply hole 7 a formed in the chuck body 7 is provided. Are slidably disposed with respect to.

A flange 18 is formed below the core tank holder 17. The flange 18 is formed on the barrel 1 so that the core tank holder 17 does not rotate with respect to the barrel 1. In the sliding groove 19. Reference numeral 20 denotes a repellent member for urging the lead tank holder 17 rearward (upward). The lead tank holder 17 and the lead tank 13
A knock portion 103 is disposed at a rear end of the knock portion 103.

The operation will be described. One of the plurality of lead cores L arranged in the lead core storage section 13a of the lead tank 13 is placed in the lead core sliding groove 16 by the rotation of the lead tank 13 for knocking operation, and the chuck body 7 Is inserted into the lead core supply hole 7a.

Next, the operation will be described. When the knock portion 103 is pressed from the state shown in FIGS. 3 and 4, the lead tank holder 17 is lowered, and at the same time, the lead tank 13 is
It descends while rotating according to 4. The lead core L is placed in the lead core sliding groove 16 by the rotation of the lead tank 13 (FIGS. 5 and 6).
reference). Then, the placed lead core L is in the lead core sliding groove 16.
Is guided down into the chuck body 7.

When the knock portion 103 is further pressed, the lead tank 13 is lowered together with the lead tank holder 17 while rotating (see FIGS. 7 and 8).
When the lower end of the chuck body 7 presses the rear end of the chuck body 7, the chuck body 7 expands. By expanding the chuck body 7, the lead core L
Is gripped by the chuck body 7.

[0016]

According to the present invention, there is provided a lead core feeding means in which a chuck body capable of feeding a lead core is provided in a shaft cylinder, and the lead core is stored behind the lead core feeding means. An image drawing head of an automatic drafting machine having a core tank, wherein a rotating means is formed on the inner wall of the barrel, and an engaging step portion for engaging with the rotating means is formed on an outer wall of the core tank; In the core tank, a core tank holder in which a lead core sliding groove is formed so as to be coaxial with a lead core supply hole formed at the rear end of the chuck body is slidably disposed with respect to the shaft cylinder. Therefore, even if the automatic drafting machine is installed horizontally, it can be installed at an angle of about 60 degrees and even if it is written, the second lead can be reliably supplied into the chuck body.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a main part of the embodiment of the present invention.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a development view showing a relationship between the shaft cylinder and the engagement step portion corresponding to FIG. 3;

FIG. 5 is an operation explanatory view taken along a line AA corresponding to FIG. 1;

FIG. 6 is a development view showing a relationship between a shaft cylinder and an engagement step portion corresponding to FIG. 5;

FIG. 7 is an operation explanatory view taken along a line AA corresponding to FIG. 1;

FIG. 8 is a development view showing a relationship between the shaft cylinder and the engagement step portion corresponding to FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shaft barrel 1a Engagement step part 2 Tip member 3 Slider spring 4 Slider 5 Lead core holding means 6 Ball chuck mechanism 7 Chuck body 7a Lead core supply hole 8 Receiving seat 9 Roller 10 Inclined surface 11 Chuck ring 12 Chuck Spring 13 Core tank 13a Lead core storage part 14 Rotating cam groove 15 Engagement step 16 Lead core sliding groove 17 Core tank holder 18 Flange 19 Sliding groove 20 Repellent member 103 Knock part L Lead core

Claims (1)

(57) [Scope of request for utility model registration] 1. A lead core feeding means having a chuck body capable of feeding a lead core in a shaft cylinder,
An image drawing head of an automatic drafting machine having a lead tank for storing lead cores behind the lead core feeding means, wherein a rotating means is formed on the inner wall of the barrel and a rotating means is provided on an outer wall of the lead tank. And a lead core sliding groove is formed in the core tank so as to be coaxial with a lead core supply hole formed at a rear end of the chuck body. An object drawing head for an automatic drafting machine, wherein a core tank holder is slidably disposed with respect to a shaft cylinder.