JPH0655560B2 - Recording device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to: (a) a carriage movable along a guide rail positioned parallel to a recording surface; and (b) a carriage arranged on the carriage. And (i) a mover that holds a writing instrument for recording a predetermined content on the recording surface, (ii) a guide portion that guides the mover in a perspective direction with respect to the recording surface, and (iii) The present invention relates to a recording device provided with a drive device that drives the movable element together with the writing tool against the elastic force of an elastic body toward the side closer to the recording surface in the perspective direction. The present invention relates to a technique for preventing rotation of a mover around a shaft extending in a perspective direction with respect to a recording surface as a center, in other words, rotation of a writing instrument.

(Prior Art) Conventionally, as a device designed to prevent the above-described rotation, there is one shown in FIGS. 5 and 6. Next, this device will be described with reference to the drawings.

The mover 2 which holds and holds the pen 1 at the left end is
It is pierced by a guide shaft 4 whose both ends are fitted to the carriage 3 side, and is rotatably supported around the guide shaft 4. Further, the mover 2 is elastically biased upward with respect to the guide shaft 4 by a spring 5 interposed below the mover 2 in FIG. On the other hand, on the right end side of the mover 2, there is provided an actuator 6 that pushes the mover 2 downward in FIG. 5 against the elastic biasing force of the spring 5.

Further, a sliding wall portion 7 is erected on the right end portion of the mover 2, and a pair of bearings 8 are provided on the carriage 3 side so as to sandwich the sliding wall portion 7 as shown in FIG. It is provided. The sliding wall portion 7 and the pair of bearings 8 prevent the movable element 2 from rotating around the guide shaft 4.

(Problems to be Solved by the Invention) However, the above-mentioned one has a problem that a pair of expensive bearings must be used.

Also, in order to prevent rotation of the mover around the guide shaft, the clearance between the sliding wall and the bearing and the radial clearance peculiar to the bearing must be removed. And the other bean ring must be attached while preloading through the sliding wall. Moreover, if a preload is excessively applied, the sliding resistance between the sliding wall portion and the bearing becomes large, so that an appropriate preload must be applied. Therefore, there is a problem that it is difficult to control the preload applied during assembly.

The present invention has been made for the purpose of solving such a problem.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the recording apparatus according to the present invention is the above-mentioned recording apparatus, wherein the elastic body is bendable in a perspective direction with respect to the recording surface. It is composed of a strip-shaped leaf spring arranged so that a wide surface extends along the recording surface, one end side in the longitudinal direction of this leaf spring is fixed to the mover, and the other end side in the longitudinal direction is (I) is provided on the carriage side, and (ii) an engaging portion having an inner side surface along the longitudinal direction of the leaf spring that forms a tapered space toward the recording surface in a sectional view, Both side edges of the leaf spring are engaged with these inner side surfaces so as to be slidably movable in the longitudinal direction of the leaf spring.

(Operation) Since both side edges of the strip-shaped leaf spring that acts to separate the movable element including the writing instrument by a predetermined distance from the recording surface by the elastic force are engaged with the inner side surface of the engaging portion, The freedom of rotation of the leaf spring itself about an axis along the perspective with respect to the recording surface is prevented. Therefore,
The mover fixed to one end of the leaf spring is also prevented from rotating about an axis extending in the perspective direction with respect to the recording surface.

(Example) Next, a specific example of the recording apparatus according to the present invention will be described.
An XY plotter, which is an example of a recording apparatus, will be described with reference to the drawings.

In FIGS. 1 and 2, a carriage is provided on a Y-axis guide rail 10 which is positioned parallel to the recording surface and reciprocates in the X-axis direction on the recording surface along an X-axis guide axis (not shown). 11 are attached. The carriage 11 reciprocates in the Y-axis direction along the Y-axis guide rail 10 by an index wire (not shown), so that the Y-axis guide rail 10 is sandwiched from both the upper and lower sides. A roller 12 composed of individual running bearings is provided. In addition, in the carriage 11,
As shown by the arrow in FIG. 1, a pen which is an example of a writing instrument in the direction A, in other words, the perspective direction with respect to the recording surface.
A drive device 14 for driving 13 is provided.

This driving device 14 has a movable element 16 having a pen holding portion 15 for retaining the pen 13 at the left end, and a leaf spring 17 for lifting the movable element 16 to an upper stop point shown in FIG. 1 by an elastic force. And an actuator 19 that pushes down the mover 16 downward in the A direction by the guide of the guide shaft 18 against the elastic force of the leaf spring 17.

The mover 16 has a through hole 20 penetrating in the direction A in the central portion thereof, and the through hole 20 has the through hole 20.
A linear motion bearing 21 through which 18 is inserted is fitted inside. Therefore, with the guide shaft 18 and the linear motion bearing 21, the A of the mover 16 is
A highly accurate linear movement in the direction is ensured. The guide shaft 18 is supported by the support portions 22 of the carriage 11 at both ends thereof.

Further, the pen holding portion 15 of the mover 16 includes a fixed arm 15a, a movable arm 15b which is arranged so as to face the fixed arm 15a and is rotatably supported, and is attached to the movable arm 15b. It is composed of a biasing spring 15c that applies a force to hold the pen 13 by its fixed arm 15a. The pen 13 is attached and detached by rotating the movable arm 15b against the elastic biasing force of the biasing spring 15c.

Further, the actuator 19 is arranged on the right end side of the mover 16, and the actuator 19 is composed of an actuator shaft 19a and a main body 19b including a solenoid coil. The actuator shaft 19a has a lower end fixed to the mover 16 by a well-known means in FIG. 1, and is provided in parallel with the guide shaft 18, in other words, with an axis line in the A direction. On the other hand, the main body 19b of the actuator 19 is attached to the carriage 11 side. The axis of the pen 13, the guide shaft 18, and the actuator shaft 19a are provided so as to be located on an imaginary line B parallel to the Y-axis guide rail 10 as shown in FIG.

At the right end of the mover 16, the left end of the strip-shaped leaf spring 17 is
As shown in the figure, it is fitted into a recess 24 formed in the mover 16 and fixed by a screw 25. As shown in FIG. 2, the strip-shaped leaf spring 17 has a center line that coincides with the imaginary line B, has a longitudinal direction along the imaginary line B, and is bent in the A direction. The wide surface is arranged along the recording surface. Further, the right end of the leaf spring 17 is engaged with a groove 26 provided on the protruding portion 23 of the carriage 11 and corresponding to an engaging portion in the present invention along the longitudinal direction of the leaf spring 17. As shown in FIG. 4, the groove 26 is formed by a pair of inclined inner side surfaces 26a that form a tapered space toward the recording surface in a sectional view. Both side edge portions 17a of the leaf spring 17 are engaged with the inclined inner side surfaces 26a so as to be slidably movable in the longitudinal direction of the leaf spring 17.

Next, the reason why the degree of freedom of rotation of the movable element 16 about the guide shaft 18, that is, the pen 13 is simply and surely prevented by the groove 26 having the inclined inner side surface 26a described above will be described.

In order to secure the degree of freedom in which the leaf spring 17 in the groove 26 can move in the direction along the groove 26, in other words, in the longitudinal direction of the leaf spring 17, the width w of the leaf spring 17 <the width W of the groove 26 is sufficient. . In this case, if a gap Δ = W−w> 0 is generated between the groove 26 and the leaf spring 17, the leaf spring 17 can rotate in the groove 26 around the axis along the direction A. Therefore, the mover 16 has a degree of freedom of rotation about the guide shaft 18. However,
As shown in FIG. 4, the groove 26 has an upper width W ₁ and a lower width W ₁ .
₂ and the depth H and the plate width w and the plate thickness t of the plate spring 17, if the inclined inner side surface 26a satisfying W _{2 max} <w _min W _{1 min} >> w _max H >> t is provided. The gap Δ between the groove 26 and the leaf spring 17 can be always zero even if there is some variation due to dimensional tolerances in the processing of the groove 26 and the leaf spring 17. In other words, the rotation around the guide shaft 18 can be prevented easily and reliably without requiring the parts to have high precision.

For the movement of the mover 16 in the A direction, the leaf spring 17
And the right end side of the leaf spring 17 engaging with the inclined inner side surface 26a of the groove 26 in FIGS. 1 and 2 is movable along the inclined inner side surface 26a. As the leaf spring 17 approaches, the groove 26
The mover 16 can be freely moved in the A direction by being pulled out from the inside by sliding contact movement.

In this embodiment, the leaf spring 17 has a center line whose phantom line is B.
However, as long as the leaf spring 17 can be bent in the A direction, it can be provided at any position between the mover 16 and the carriage 11 side as described above.

(Effects of the Invention) By engaging the other end of the leaf spring, which acts to separate the mover including the writing instrument by a predetermined distance from the recording surface by the elastic force, with the engaging portion, There is no need to use expensive bearings as they can prevent rotation.

Further, since the bearing and the like are not used, it is not difficult to control the preload applied during the assembly, and the assembly can be easily performed.

[Brief description of drawings]

1 to 4 are drawings for explaining a specific embodiment of a recording apparatus according to the present invention, wherein FIG. 1 is a front view, FIG. 2 is a plan view, and FIG. 3 is a part. FIG. 4 is an enlarged bottom view and FIG. 4 is a sectional view taken along line IV-IV in FIG. Further, FIG. 5 and FIG. 6 are a vertical sectional view and a plan view having a partial cross section for explaining a conventional example. 10 …… Y-axis guide rail 11 …… Carriage, 12 …… Roller 13 …… Pen, 14 …… Driving device 15 …… Pen holder, 15a… Fixed arm 15b… Movable arm, 15c… Biasing spring 16 …… Mover, 17 …… Leaf spring 17a …… 17 side edge, 18 …… Guide shaft 19 …… Actuator, 19a …… Actuator shaft 19b …… 19 body, 20 …… Through hole 21 …… Linear motion bearing 22 …… Supporting part, 23 …… Projecting part 24 …… Recessed part, 25 …… Screw 26 …… Groove, 26a …… Inclined inner side surface

Claims (1)

[Claims] 1. A carriage that is movable along a guide rail that is positioned parallel to a recording surface, and (b) is arranged on this carriage, and (i) has a predetermined content on the recording surface. A movable element for holding a writing instrument for recording the data, (ii) a guide portion for guiding the movable element in a perspective direction with respect to the recording surface, and (iii) an elastic body toward a side closer to the recording surface in the perspective direction. A driving device having a driving part for driving the mover together with the writing instrument against the elastic force of the elastic body, the elastic body being provided on the recording surface so as to be bendable in a perspective direction with respect to the recording surface. It is composed of a strip-shaped leaf spring arranged so that the wide surface is along, one end side in the longitudinal direction of this leaf spring is fixed to the mover, and the other end side in the longitudinal direction is (i) Carry (Ii) has an inner side surface along the longitudinal direction of the leaf spring that forms a tapered space toward the recording surface in a sectional view. A recording apparatus, wherein both end edges of the leaf spring are engaged so as to be slidably movable in a longitudinal direction of the leaf spring.