JPH01272497A - X-y plotter - Google Patents

Abstract

PURPOSE:To ensure the replacement of a writing utensil, by a method wherein in the replacement of a writing utensil a writing utensil stocker can be moved relatively to a head in a longitudinal direction to a pen head straightforward moving direction by a pen head drive force. CONSTITUTION:The bottom of a writing utensil stocker 4 is detachably fitted to an output shaft of a stepping motor 2 through a rotation stop mechanism. On the stocker 4, a plurality of pen holders 6 are mounted at predetermined interval. A pen holder 12 is provided on a pen head 8 movably mounted on a Y rail on a paper guide platen 10. By rotating the stocker 4, the desired pen holder 6 is disposed opposedly to the pen head 8 spaced a predetermined distance therefrom, and the head 8 is moved straight in a direction -Y until the holder 12 on the side of the head 8 is overlapped on the holder 6 on the side of the stocker. After that, the head 8 moves backwards in a direction +Y, whereby a writing utensil 14 is automatically replaced between the pen holders 12 and 6.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is an X-ray device that allows writing instruments to be exchanged between a writing instrument stocker on the body side and a pen head.
- Regarding Y plotter.

[Conventional technology]

An X-Y plotter that allows writing instruments to be exchanged between a writing instrument stocker on the machine side and a pen head is disclosed in Japanese Patent Application Laid-open No. 60-31999 and 56-621.
It is publicly known from No. 98 and the like.

In these devices, writing instruments are exchanged by the pen head approaching and retracting from the writing instrument stocker.

[Problem that the invention seeks to solve]

When exchanging writing instruments, the pen head moves straight toward the writing instrument stocker from a pen change standby position facing the selected pen holder of the stocker with a predetermined interval, so that the pen holder of the stocker and the pen holder of the pen head overlap. The pen head moves to the pen change position, and then linearly moves away from the writing instrument stocker. During this process, the writing instrument moves from the stocker to the pen head or from the pen head to the stocker. This writing instrument exchange can be performed reliably by ensuring that the center of the pen holder of the pen head and the center of the pen holder of the writing instrument stocker facing the pen head are exactly aligned.

However, due to factors such as precision errors in the parts of the writing instrument stocker, positional errors in the installation of parts around the writing instrument stocker, and assembly errors in the writing instrument stocker, the center of the pen holder of the writing instrument stocker when replacing writing instruments may not be aligned with the pen head facing it. There were cases in which the writing instrument could not be replaced properly because it misaligned with the center of the pen holder.

The present invention aims to solve the above problems.

[Means to solve problems]

In order to achieve the above object, the present invention allows a writing instrument to be used by moving a pen holder on the pen head side toward one of a plurality of pen holders of a writing instrument stocker provided on the body side in a straight direction to a predetermined position and then retreating. In an X-Y plotter in which writing instruments can be mutually exchanged between a stocker and a pen head, when exchanging writing instruments, the driving force of the pen head moves the writing instrument stocker in the left and right directions with respect to the rectilinear movement direction of the pen head. The head is movable relative to the head.

[Effect]

In the above configuration, even if there is a misalignment between the centers of the pen holder of the writing instrument stocker and the pen holder of the pen head, which face each other, when replacing writing instruments due to accuracy errors of the parts of the writing instrument stocker or one assembly error,
When the pen head approaches the writing instrument stocker, the pen holder of the pen head engages with the pen holder of the writing instrument stocker via the writing instrument, and the writing instrument stocker is forcibly moved relative to the pen head by the driving force of the pen head, so that the center is aligned. This will ensure that writing utensils are replaced.

〔Example〕

The structure of the present invention will be described in detail below with reference to embodiments shown in the accompanying drawings.

Reference numeral 2 denotes a stepping motor fixedly installed on the body side of a known paper-driven X-Y plotter, and the bottom of a rotary writing instrument stocker 4 (hereinafter simply referred to as stocker) has a rotation stopping mechanism on the output shaft of this stepping motor. They are removably fitted through the connector. The stocker 4 is provided with a plurality of known pen holders 6 at predetermined intervals. 8 is a Y rail arranged on the platen 10 for paper guide (not shown)
The pen head is movably attached to the pen head, and a known pen holder 12 is provided on the pen head. The stocker 4
Rotate and place the desired pen holder 6 on the stocker 4 side.
facing the pen head 8 at a predetermined distance, and move the pen head 8 in the -Y force direction to a predetermined position where the pen holder 12 on the pen head 8 side and the pen holder 6 on the stocker side overlap, as shown in Figure 8. When the pen head 8 moves straight ahead and then moves backward in the +Y force direction, the writing instrument 14 is automatically exchanged between the pen holders 12 and 6.

Next, the operation of this embodiment will be explained.

First, the pen head 8 is moved close to the stocker 4 as shown by block 1 in FIG. Next, the controller drives the stepping motor 2, rotates the stocker 4, and places the pen holder 6 with the desired number on the pen head 8.
(Block 2). Next, the excitation of the motor 2 is stopped (block 3), so that the stocker 4 can freely rotate. Next, the pen head 8 is moved in the -Y direction to the writing instrument exchange position (block 4). At this time, as shown in FIG. The writing instrument 14 held in the pen head 8 is held between the fixed arm 12a and the movable arm 12b of the pen holder 12 on the pen head 8 side, and the pen holders 6 and 12 of the pen head 8 and the stocker 4 overlap. At this time, if the writing instrument holding centers of the pen holders 6.12 of the pen head 8 and the stocker 4 are shifted from each other, the rotation angle of the stocker 4 is corrected by the driving force of the pen head 8, and the pen holder 6 of the stocker 4 is Move left and right with respect to the direction, and move the writing instrument holding center of the selected pen holder 6 on the stocker 4 side and the pen head 8.
The writing instrument holding center of the pen holder 12 on the side matches exactly.

Next, the controller excites the stepping motor 2 to prevent the stocker 4 from moving (block 5).
. Next, when the pen head 8 is moved in the +Y force direction (block 6), the pen holder 12 of the pen head 8 is moved to the writing instrument 1.
Move away from stocker 4 while holding 4. The operation of placing the writing implement held on the pen head 8 side into the empty pen holder 6 on the stocker 4 side is also the same as the above operation.

Next, another embodiment in which the stocker is movable in response to external force will be described with reference to FIG.

The inner diameter part of a tube body 32 having a flange 32a is slidably fitted to the output shaft of a stepping motor 3° for stocker rotation control, and a stopper perpendicular to the axial direction is formed at the middle part of the inner diameter. The surface is in contact with the upper end surface of the output shaft 31. One side of an elastic body 36 made of rubber or a spring is fixed to a disk 34 fixed to the upper end of the tube body 32.
The other end of the elastic body 36 is fixed to the upper surface of the output shaft 31. A stopper shaft 38 is provided protruding from the upper surface of the collar portion 32a. At the bottom of the writing instrument stocker 40.

An insertion hole 42 is formed corresponding to the tube body 32, and
A rotation stopper hole is bored corresponding to the stopper shaft 38.

In the above configuration, the insertion hole 42 of the stocker 40 is slidably fitted into the tube body 32, and.

By slidably inserting the rotation stopper hole into the stopper shaft 38, the stocker 40 can be detachably attached to the stepping motor 30.

When a forcing force is applied to the stocker 40 in the rotational direction in the attached state and the output shaft 31 is in the fixed state,
The stocker 40 rotates with respect to the output shaft 31 against the elasticity of the first elastic body 36 in the torsional direction.

4. As shown in FIG. 5, the stocker upper part 44A and the stocker lower part 44B are connected to a hole 46 formed in the stocker upper part, and a shaft body 48 fixed to the stocker lower part 44B, which is rotatably fitted into the hole 46. The shaft body 48 and the upper wall of the hole 46 are connected by an elastic body 50 made of rubber or a spring, so that the upper side of the stocker 44 having the pen holder 52 is not subjected to external force. It may also be rotatable.

Although the above embodiment relates to a rotary writing instrument stocker, the present invention can also be applied to a known pen line type writing instrument stocker used in a flatbed type X-Y plotter.

In FIG. 6, 56 is a bracket disposed on the body of the X-Y plotter, and the board 58A of a plurality of pen holders 58 is attached to the upper horizontal part of the bracket so as to be movable laterally. The other end of an elastic body 60 made of rubber or a spring fixed to both sides of the substrate 58A is fixed to the bracket 56 side.

In the above configuration, when replacing the writing instrument, the pen head (not shown) moves to a position facing the desired pen holder 58, and moves from this position in the +X direction to the writing instrument exchange position. At this time, if the center of the pen holder on the pen head side and the center of the selected pen holder 58 on the stocker side do not match, a forcing force is generated on the pen holder 58 in the left-right direction in FIG. 7. The pen holder 58 is moved from side to side by this force against the elasticity of the elastic body 60, the position of the pen holder 58 is corrected, and the writing instrument is reliably exchanged between the stocker and the pen head. still,
It is also possible to make the pen holder on the pen head side movable against an external force against the elastic force of the elastic body.

〔effect〕

Since the present invention is constructed as described above, there is an advantage that writing instruments can be replaced reliably.

[Brief explanation of the drawing]

Fig. 1 is a plan view, Fig. 2 is a side view, Fig. 3 is a flowchart, Fig. 4 is a sectional view of another embodiment, Fig. 5 is a partially sectional front view of another embodiment, and Fig. 6. is an external view, FIG. 7 is an explanatory view, and FIG. 8 is an explanatory view. 2...Motor, 4...Writing instrument stocker, 6...
Pen holder, 8... Pen head, 10... Platen, 12... Pen holder, 14... Writing instrument, 3o
... Motor, 32 ... Pipe body, 34 ... Disc, 36
... Elastic body, 38... Stopper shaft, 40... Stocker, 44A... Stocker upper part, 46... Hole, 48... Shaft body, 50... Elastic body, 52... Pen holder, 56... Bracket, 58... Pen holder, 58A... Board, patent applicant
Muto Kogyo Co., Ltd. Representative Patent Attorney Aya Nishijima Figure 3 Figure 4 Figure 1. Figure 6 1 included Figure 7 cI. 〜 So ψ

Claims (1)

[Claims] (1) The pen holder on the pen head side approaches one of the multiple pen holders of the writing instrument stocker installed on the machine side in a straight line until it reaches a predetermined position, and then moves backward, thereby creating a space between the writing instrument stocker and the pen head. X- which made it possible to exchange writing instruments with each other
An X-Y plotter, characterized in that, when replacing a writing instrument, the writing instrument stocker is movable relative to the head in the left and right direction with respect to the rectilinear movement direction of the pen head by the driving force of the pen head. .