JPH068508A - Head supporting device - Google Patents

Abstract

PURPOSE:To provide a head supporting device whose position is accurately controlled in the raster direction and the skew direction respectively. CONSTITUTION:A head supporting device 1 for supporting a recording head 52 for performing information record is equipped with a head holder 2 holding the recording head 52 and a suspending support mechanism part 4 with an arbitrary number of elastic members 3 for supporting both end faces of the head holder 2 respectively in a suspending state. The head supporting device 1 is provided with a raster regulating mechanism part 6 and a skew regulating mechanism part 8. In the mechanism part 6, a feed screw 5 in contact with the head holder 2 is used in order to perform the positional regulation in the raster direction of the head holder 2 holding the recording head 52. In the mechanism part 8, an eccentric cam 7 is used in order to perform the positional regulation in the skew direction of the head holder 2 holding the recording head 52. The respective positional control in the raster direction and the skew direction can be accurately performed by this constitution. The follow-up ability of a servo-mechanism part is enhanced and the reliability thereof can be secured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head supporting device, and more particularly to a head supporting device suitable for supporting a recording head such as a color electrostatic plotter.

[0002]

2. Description of the Related Art Generally, a color electrostatic plotter has a structure shown in FIG. That is, the color electrostatic plotter 50 feeds the paper P wound in a roll shape to the paper feeding unit 51 and the paper P fed from the paper feeding unit 51 in order of black, cyan, magenta, and yellow. A total of 4 parallel arrangements for recording color information
Individual recording heads 52, a paper feed motor 53 that conveys the paper P in the direction of the arrow, and a toner station 54 that is arranged in the vicinity of each recording head 52 and that supplies black, cyan, magenta, and yellow toners to the paper P. It is equipped with.

FIG. 7 shows an outline of a head supporting device 60 which supports the recording head 52. FIG. 8 is an explanatory diagram showing the displacement of the recording head in the raster direction and the skew direction. The head support device 60 shown in FIG.
The feed screw 62 and the first motor 6 that adjust the position in the raster direction (see FIG. 8) with respect to the support member 61 that supports the
Raster adjustment mechanism section 64 using 3 and the first motor 6
3 is fixed and is displaceable integrally with the support member 61 that supports the recording head 52 only in the skew direction, and in the skew direction with respect to the first motor mounting plate 59 (see FIG. 8). ) Adjusting the position of feed screw 65
And a skew adjustment mechanism section 67 using a second motor 66 attached to a second motor attachment plate 68 fixed to a body frame (not shown). On the other head support part, a slide mechanism part 70 in the raster direction and a rotation fulcrum mechanism part 7 in the skew direction are provided.
1 and.

[0004]

However, in the case of the above-described head support device 60, the feed screws 62 and 65 are used to adjust the position in the raster direction and the position in the skew direction with respect to the support member 61 that supports the recording head 52. Since the feed screws 62 and 65 are backlashed and the skew adjustment mechanism 67 adjusts the position, frictional resistance is generated at the rotation fulcrum 69 of the support member 61. However, there is a problem that the reliability of the servo mechanism unit (not shown) for correcting the dot deviation of the information to be recorded is hindered.

Therefore, the present invention provides a head support device having an improved structure and capable of accurately performing position adjustment in the raster direction and position adjustment in the skew direction, and contributing to ensuring the reliability of the servo mechanism section. The purpose is.

[0006]

According to the present invention, in a head supporting device for supporting a recording head for recording information, a head holder for holding the recording head and both end surfaces of the head holder are suspended. Raster adjustment using a suspension support mechanism that uses an arbitrary number of elastic members to support and a feed screw that constantly contacts the head holder that holds the recording head in order to adjust the position in the raster direction. It has a mechanism section and a skew adjustment mechanism section using an eccentric cam for adjusting the position of the head holder that holds the recording head in the skew direction.

Further, the elastic member of the suspending support mechanism urges the end face of the head holder toward the top of the feed screw of the raster adjusting mechanism.

[0008]

The operation of the head supporting device having the above-mentioned structure will be described below. According to this head supporting device, since the head holding body for holding the recording head is supported by the suspension supporting mechanism portion using an arbitrary number of elastic members in a state where both end surfaces are suspended, the raster adjusting mechanism. The frictional resistance at the time of position adjustment by the parts and the skew adjusting mechanism is eliminated.
In addition, the position adjustment in the raster direction of the head holder that holds the recording head is performed by the raster adjustment mechanism that uses the feed screw that constantly contacts the head holder, and the position adjustment of the head holder in the skew direction is also eccentric. Since the skew adjustment mechanism section using the cam is used, backlash due to the feed screw unlike the conventional example is eliminated. As a result,
Each position adjustment in the raster direction and the skew direction can be accurately performed, and the reliability of the servo mechanism section can be ensured.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A head support device according to an embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a schematic plan view of a head supporting device according to an embodiment of the present invention, and FIG. 2 is an enlarged sectional view showing a raster adjusting mechanism portion of the device of the present embodiment. The head supporting device 1 shown in FIG. 1 includes a head holder 2 that holds a recording head 52 such as a color electrostatic plotter, and two heads 2 that support both end surfaces of the head holder 2 in a suspended state. A pair of suspending and supporting mechanism parts 4 using one elastic member 3 and a feed screw 5 which is always in contact with the head holder 2 for adjusting the position of the head holder 2 holding the recording head 52 in the raster direction. And a skew adjustment mechanism section 8 using an eccentric cam 7 for adjusting the position of the head holder 2 that holds the recording head 52 in the skew direction.

The pair of suspension supporting mechanism portions 4 are attached so as to face the inner surfaces of the upper ends of the pair of fixed frames 9 and 10, respectively.

The head holder 2 holds the recording head 52 so that the recording surface of the recording head 52 is exposed upward.
1 and contact plates 12a and 12b fixed to the lower surfaces of both ends of the holding substrate 11, respectively. In addition, in FIG.
Reference numeral 13 is a circuit board attached to the lower side of the holding board 11.

The pair of suspension supporting mechanism portions 4 have a symmetrical structure on both sides of the head holder 2. That is, the suspension support mechanism section 4 includes a pair of fixed frames 9, 1.
Fixing plates 14a and 14b respectively attached to the facing surfaces of 0,
Two upper ends of the fixing plates 14a, 14b are fixed to the upper ends by the stoppers 15, and lower ends of the contact plates 12a, 12b are fixed by the stoppers 16 on each side. , A total of four elastic members 3 are provided,
As a result, the head holder 2 is supported in a suspended state. In this embodiment, a leaf spring is used as the elastic member 3.

FIG. 3 is a schematic front view of the elastic member of the apparatus of this embodiment. As shown in FIG. 3, in this embodiment, the elastic member 3 is used.
A leaf spring is used as each of the elastic members 3, and each elastic member 3 is fixed by two stop members 15 and 15 and two stop members 16 and 16. Further, the elastic member 3 is formed in a shape as shown in FIG. 4, and is formed by the fixing plates 14a and 14b and the contact plates 12a and 1a.
By installing a straight line between the 2b and each,
The abutting plate 12a of the head holder 2 is attached to the raster adjusting mechanism 6
Of the feed screw 5 is always brought into contact with the top.

As shown in FIG. 2, the raster adjusting mechanism portion 6 includes a first motor 20 having a driving shaft 21 mounted horizontally with respect to a fixed frame 10 and a contact plate 12.
a feed screw 5 screwed to the fixed plate 14a at a lateral position of a,
A disc 22 having a central portion fitted to a driving shaft 21 of the first motor 20, an engagement pin 23 projecting from a position near the outer circumference of the disc 22 in the same direction as the feed screw 5, and a feed screw 5 Hole 25 with the center attached to the bottom and near the outer periphery
And a drive disk 24 through which the engaging pin 23 is inserted.

FIG. 5 is a side view showing the skew adjusting mechanism portion of the apparatus of this embodiment. As shown in FIG. 5, the skew adjusting mechanism portion 8 includes a fixed plate 14b attached to the fixed frame 9 so as to be displaceable in the skew direction, and a rotating roller 27 provided so as to project from the fixed plate 14b to the fixed frame 9 side. When,
The second motor 30 attached to the fixed frame 9 with the shaft 29 facing the outer peripheral side of the rotary roller 27, the eccentric cam 7 attached to the shaft 29 of the second motor 30, and the fixed frame 9 are installed. And the shaft 2 of the second motor 30
It is provided with a biasing spring 32 that biases the rotating roller 27 toward the 9 side so that the outer peripheral portion of the rotating roller 27 always contacts the eccentric cam 7.

The operation of the head supporting device 1 having the above-mentioned structure will be described below. According to this head support device 1, the head holder 2 that holds the recording head 52 is supported by the suspension support mechanism section 4 using a total of four elastic members 3 in a state where both end surfaces are suspended. Since the raster adjusting mechanism 6 and the skew adjusting mechanism 8 adjust the position, there is no fulcrum of rotation, which eliminates the frictional resistance based on the position adjustment as in the conventional example. Further, the recording head 52 can be easily horizontally supported by supporting the head holder 2 by using two elastic members 3 from both sides in total.

Further, the position adjustment in the raster direction of the head holding body 2 holding the recording head 52 is performed by a raster adjusting mechanism using a feed screw 5 whose top is always in contact with the head holding body 2 by the urging force of the elastic member 3. Similarly, the position of the head holder 2 in the skew direction is adjusted by the portion 6, and the displacement of the eccentric cam 7 driven by the second motor 30 is adjusted.
Since it is performed by the skew adjusting mechanism 8 which is transmitted to 7, the backlash due to the feed screw unlike the conventional example is eliminated.

As a result, each position adjustment in the raster direction and the skew direction can be performed accurately, the followability of the servo mechanism portion is enhanced, and the reliability can be secured.

The present invention is not limited to the above-mentioned embodiments, but various modifications can be made within the scope of the gist thereof.

[0020]

According to the present invention described in detail above, since it has the above-mentioned configuration, each position adjustment in the raster direction and the skew direction can be performed accurately, and the followability of the servo mechanism section is improved. It is possible to provide a head support device capable of ensuring reliability.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a head support device according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view showing a raster adjustment mechanism portion of the device of this embodiment.

FIG. 3 is a schematic front view of an elastic member of the apparatus of this embodiment.

FIG. 4 is a side view showing an elastic member of the apparatus of this embodiment.

FIG. 5 is a side view showing a skew adjusting mechanism portion of the apparatus of this embodiment.

FIG. 6 is a perspective view of a color electrostatic plotter.

FIG. 7 is a schematic view of a conventional head support device.

FIG. 8 is an explanatory diagram showing displacement of a recording head in a raster direction and a skew direction.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Head support device 2 Head holder 3 Elastic member 4 Suspension support mechanism part 5 Feed screw 6 Raster adjustment mechanism part 7 Eccentric cam 8 Skew adjustment mechanism part 52 Recording head

Claims (2)

[Claims] 1. A head supporting device for supporting a recording head for recording information, comprising: a head holder for holding the recording head; and an arbitrary number of elastic members for supporting both end faces of the head holder in a suspended state. Holds the suspension head mechanism used, the raster adjustment mechanism that uses a feed screw that constantly contacts the head holder that holds the recording head in order to adjust the position in the raster direction, and the recording head And a skew adjustment mechanism section using an eccentric cam for adjusting the position of the head holder in the skew direction. 2. The elastic member of the suspension support mechanism section,
The head support device according to claim 1, wherein the end surface of the head holder is biased toward the top of the feed screw of the raster adjusting mechanism.