JPH04146196A - Preparatory lead following apparatus for pencil for plotter - Google Patents

Abstract

PURPOSE:To prevent the following of a preparatory lead during drawing and to make said following possible at a pen station by a method wherein a lead obstructing member is positioned just above the lead inserting hole of a funnel-shape member in the state held by a drawing head and moved from the region just above the lead inserting hole of the funnel-shape member in the state positioned at the pen station. CONSTITUTION:A main body 1 and a lead tank 3 are constituted in a non-revolvable state and the upper end 4B of a funnel-shape member 4 is formed into a funnel shape and the preparatory lead 6 in the lead tank 3 is guided to a chuck 2 one at a time from the upper end 4B through a lead inserting hole 4C. Further, a projection member 8 energized in the outer peripheral direction by a spring 7 is provided to the lead tank 3 at an appropriate height position in the same direction as the notch part 1B formed to the flange part 1A of the main body 1 and the lead obstructing member 9 built in the lead tank 3 is fixed to the projection member 8. The lead obstructing member 9 is usually brought into contact with the inner surface of the lead tank 3 under pressure and not positioned just above the lead inserting hole 4C of the funnel- shape member 4.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a block pencil in which a lead is fed out by advancing a chuck and a spare lead in a lead tank follows. The present invention relates to a spare lead tracking device for a plotter pencil that prevents the spare lead from following even if it becomes short.

[Conventional technology]

Conventionally, the advantage was that the spare lead could easily follow the lead,
A so-called knock-type mechanical pencil, in which a chuck is moved forward to feed out a lead or follow a spare lead in a lead tank, has been used as a plotter pencil.

[Problem to be solved by the invention]

Therefore, when the chuck is moved forward in the drawing state and the lead is fed out by the amount of wear due to writing, the spare lead in the lead tank will follow the inside of the chuck as the lead is worn out during use, and if you continue drawing. The drawing line would be cut off at the joint between the lead in use and the spare lead.

Therefore, the problem of the present invention is to prevent the spare lead from following even when the chuck advances to feed out the lead during plotting, and to enable the spare lead to follow when the plotter pencil returns to the pen station and moves the chuck forward. An object of the present invention is to provide a spare lead tracking device for a plotter pencil.

[Means to solve the problem]

A funnel-shaped member is configured at the bottom of the lead tank of the plotter pencil to follow the preliminary lead, but when the block pencil is held by the plotting head, the misalignment prevention member prevents the lead from passing through the funnel-shaped member. It is located directly above the hole to prevent the spare lead from being guided into the lead insertion hole, and when the plotter pencil is located at the pen station, the evil prevention member moves from directly above the lead insertion hole of the funnel-shaped member. However, the spare lead is guided into the chuck through the lead insertion hole.

[Embodiment] Figures 1 and 2 show a block pencil according to the first embodiment of the present invention, but the structure in which the lead is drawn out by a knock is different from the conventional knock which is used numerically. This is similar to the type mechanical pencil, so the explanation will be omitted and only the preliminary lead tracking device will be explained. The main body 1 of the plotter pencil is formed with a flange IA for vertical positioning when held on a plotting head, and a notch RIB is formed in a part of the flange IA, so that when it is held on a plotting head, a notch RIB is formed in a part of the flange IA. The structure is such that positioning can be performed in the circumferential direction. A key 4 is attached to the funnel-shaped member 4 that connects the chuck 2 and the core tank 3.
A is formed, and the key 4A is located in the key groove 5A of the receiving member 5 fixed to the main body 1, so that the main body 1 and the core tank 3 are configured to be unrotatable. The upper end 4B of the funnel-shaped member 4 is formed into a funnel shape, and the spare cores 6 in the core tank 3 are guided into the chuck 2 one by one from the upper end 4B through the core insertion hole 4C. Furthermore, at an appropriate height position of the core tank 3 and the main body 1
In the same direction as the notch IB formed in the flange IA, there is provided a protrusion member 8 which is urged in the outer circumferential direction by a spring 7, and the protrusion member 8 is built in the core tank 3 and has an evil prevention member 9. is fixed. The evil prevention member 9 is normally pressed against the inner surface of the core tank 3 and is not located directly above the core insertion hole 4C of the funnel-shaped member 4.

FIG. 3 shows a drawing state in which the plotter pencil described in 1st rgJ is held by the holding arm 11 of the drawing head 10 in the plotter, and the holding arm is configured to be movable up and down by a solenoid in the drawing head 10 11 holds the plotter pencil, and the notch IB formed in the flange IA of the main body 1 is aligned with the wall 11A of the holding arm 11, so that the plotter pencil always faces in a fixed circumferential direction. and is fixed to the holding arm 11.

Therefore, the protrusion member 8 provided on the lead tank 3 is reliably pressed against the protrusion 10A formed on the drawing head IO, and the evil prevention member 9 moves toward the center of the lead tank 3 to prevent the funnel-shaped member 4 from passing through the lead. It is located directly above the hole 4C. The state shown in FIG. 4 is when writing is interrupted and the holding arm 11 is raised from this drawing state. It comes into contact with the support member 13 of the head 10, and the chuck 2 is expanded. Therefore, at this time, the lead 14 is fed out by the amount worn out by drawing, but the spare lead 6 in the lead tank 3 is prevented from falling into the lead insertion hole 4C of the funnel-shaped member 4 by the evil prevention member 9, and the spare lead 6 is It will not fall into the chuck 2. When the lead 14 in use becomes too short to print, the sensor detects the unusable short lead, interrupts drawing, and returns the plotter pencil to the pen station. Various devices are known for detecting this short lead, such as detecting the amount of descent of the holding arm 11 during drawing, or detecting the presence or absence of a lead at a fixed position using an optical sensor. However, these various sensors can also be used in the present invention.

The state in which the plotter pencil is returned to the pen station is shown in Figure 5.
is fixed by the holding portion 15A of the pen station 15. At this time, the protrusion member 8 is urged in the outer circumferential direction by the spring 7, and the evil prevention member 9 is pressed against the inner surface of the core tank 3 and is not located directly above the core insertion hole 4C of the funnel-shaped member 4. The spare lead 6 in the lead tank 3 is guided by its own weight to the funnel-shaped upper end 4B and passes through the lead insertion hole 4C to the chuck 2.
fall to. Thereafter, by moving the knocking member 16 disposed on the upper part of the pen station 15 up and down by a solenoid, the pressing part 16A of the knocking member 16 comes into contact with the disc member 12 of the lead tank 3, and repeatedly moves the chuck 2 forward. As a result, the short lead is dropped into the remaining lead receiving member 17, and the spare lead 6 is inserted into the chuck 2 and guided to the writing tip, thereby setting it in the writable state shown in FIG. In this state, if the plotter pencil is held by the holding arm 11 of the drawing head 10, drawing can be performed again.

Next, another embodiment of the pre-core tracking device of the present invention will be described.

In the embodiment shown in FIGS. 6 and 7, the wick tank 103
The core blocking member 109 is made of an elastic piece bent into an L-shape by cutting out the side surface of the core. And in the drawing state, the 8th
As shown in the figure, the L-shaped core blocking member 109 is pressed by the protruding portion 10A of the drawing head and bent inward, so that it is directly above the core insertion hole 4C communicated with the upper end 4B of the funnel-shaped member 4. It is something to be positioned.

In the embodiment shown in FIGS. 9 and 10, the wick tank 20
Core blocking member 209 made of an elastic piece with the side surface of 3 cut out.
Configure. In the drawing state, as shown in FIG. 11, the core blocking member 209 is pressed by the projection 110A of the drawing head to bend inward, and the core insertion hole 4C communicated with the upper end 4B of the funnel-shaped member 4 is opened. It is placed directly above.

In the embodiment shown in FIGS. 12 and 13, the wick tank 3
A core blocking member 309 is formed with an opening window 303A on the side surface of the drawing head 10 and protrudes from the drawing head 10 in the drawing state.
However, the core insertion hole 4 is inserted through the opening window 303A of the core tank 303 and communicated with the upper end 4B of the funnel-shaped member 4.
It is placed directly above C.

In the embodiment shown in FIGS. 14 and 15, the wick tank 4
A notch R403B is formed at the upper end of 03, and the notch 403
The arm portion 409A of the core blocking member 409 made of a magnetic material is hooked onto B and hung, and attached to allow pendulum movement. In the drawing state shown in FIG. 16, the magnet 18 disposed on the drawing head 10 draws the core blocking member 409 to position it directly above the core insertion hole 4C communicated with the upper end 4B of the funnel-shaped member 4. It is.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and the funnel-shaped member and the core tank may be configured integrally, or the funnel-shaped member and the core tank may be configured to be separated as appropriate.

In other words, the plotter pencil used in the present invention only needs to be equipped with a lead tank that stores a spare lead and a structure that represses the lead by advancing the chuck by knocking.
Various plotter pencils known in the art can be used.

〔Effect of the invention〕

According to this invention, even if an operation is performed to feed out the lead as the lead wears out during use during drawing, the lead prevention member prevents the spare lead in the lead tank from falling from the funnel-shaped member, and the spare lead is held in the chuck. This is to prevent it from being tracked internally.

Therefore, it is possible to eliminate interruptions in the drawing line due to the connection between the lead and the spare lead during drawing.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a preliminary lead tracking device for a plotter pencil according to the present invention, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. 3 is a drawing state of the embodiment shown in FIG. 1. FIG. 4 is a cross-sectional view showing a plotting interrupted state in which the plotter pencil is raised from the plotting state in FIG. 3, and FIG.
FIG. 6, FIG. 9, and FIG. 14 are sectional views of main parts showing other embodiments of the present invention, and FIG. is the 6th T! ! : A front view of J, FIG. 8 is a sectional view of the main part showing the drawing state of the embodiment in FIG. 6, and FIG. 10 is a front view of J.
The figure is a front view of FIG. 9, FIG. 11 is a sectional view of the main part showing the drawing state of FIG. 9, FIG. 12 is a sectional view of the main part showing the drawing state of another embodiment of the present invention, and FIG. 13 is A-A in Figure 12.
15 is a cross-sectional view taken along line A--A in FIG. 14, and FIG. 16 is a cross-sectional view of main parts showing the drawing state in the embodiment shown in FIG. 14. 2... Chuck 3, 103, 203, 303, 403... Core tank 4
...Funnel-shaped member 4C... Core insertion hole 6 of funnel-shaped member 4... Spare core 9, 109, 209, 309, 409... Core blocking member 11... Holding arm Patent applicant Pilot Precision Co., Ltd. Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 14 Figure 6 Figure 6

Claims (1)

[Claims] In a plotter pencil that has a lead tank that stores spare leads and a chuck that advances or follows the lead, a funnel-shaped member is installed at the bottom of the lead tank to guide the spare leads in the lead tank one by one into the chuck. When the plotter pencil is held in a vertically movable holding arm and is in the drawing state, the lead blocking member is positioned directly above the lead insertion hole of the funnel-shaped member to prevent the spare lead from falling from the lead tank. However, when the plotter pencil is stored in the pen station, the lead blocking member is moved from directly above the lead insertion hole of the funnel-shaped member to allow the spare lead in the lead tank to pass through the lead insertion hole of the funnel-shaped member. 1. A spare lead tracking device for a plotter pencil, characterized in that it is configured to guide lead leads one by one to a chuck.