JPH1065851A - Harness guiding mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid interference with other members by locking the halfway part of a harness of which one end is fixed as a fixed end and the other end is connected to a mobile object on the actuating part of an energizing member having energizing force in a fixed direction. SOLUTION: A harness H of which one end is fixed as a fixed end F and the other end is connected to a mobile object M is prepared. The mobile object M is moved between points A, B of which distances from the fixed end F are increased/decreased. A tension pin 1 is fixed in the vicinity of the fixed end F so as to guide the harness H. An energizing member consisting of an elastic body such as an extensible spring having a fixed end 2a is arranged between the fixed end F and the pin 1 and the harness H is hooked on the free end 2b of the member 2. The free end 2b of the member 2 is energized to the side of the fixed end 2a and the energizing direction is allowed to coincide with a direction for distorting the harness H in accordance with the movement of the mobile object M. In the structure, the harness bending direction due to the movement of the mobile object M can be regulated to a fixed direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for preventing a harness having one end fixed and the other end connected to a moving body from being largely bent with the movement of the moving body.
For example, the present invention relates to an apparatus applied to an optical reading apparatus for reading a still original in a copier or an image processing apparatus having both functions of copying and facsimile.

[0002]

2. Description of the Related Art In an optical scanning apparatus which is applied to the above-described image processing apparatus and has a function of reading a still original, the scanning body provided with a light source is moved to irradiate the original to read the image. However, in order to apply a voltage to the light source, a harness must be provided from the power source to the light source. Some light sources use fluorescent lamps because they have high brightness and can be read in a short time. In this case, since the brightness of the fluorescent lamp must be stabilized in order to stabilize the image quality, an inverter is used as a stabilizer. Conventionally, this inverter was attached to a scanning body having a fluorescent lamp.However, when an inverter was attached to a scanning body, the inverter protruded from the scanning body. However, since it is necessary to provide an arrangement space for the protrusion of the inverter, which leads to expansion of the image reading device in the left-right direction or the depth direction, which hinders downsizing, the inverter is separated from the scanning body. , Separately and at different speeds. That is, the inverter is delayed from the scanning body so that the inverter does not project when the scanning body reaches the end of movement. In this case, a harness must be provided between the power supply and the inverter.

In such a case, the power supply side of the harness is fixed, and the opposite side, that is, a scanning body having a light source,
Alternatively, the end connected to the moving body that is an inverter will move, and the distance between the harness and the fixed end on the power supply side fluctuates with the movement of the moving body,
Conventionally, a V-shaped structure has been dealt with as a bendable structure.

[0004]

However, in the conventional harness of the bending structure, the bending load at the bending portion is high,
There is a problem with durability. In order to avoid this, it is necessary to have a structure that bends the harness when the space between the moving body and the fixed end is narrowed. However, other members are arranged near the harness and do not interfere with them. As described above, it is necessary that the bending direction is also fixed and the size is compact.

[0005]

The present invention uses the following means in order to solve the above problems. That is, there is provided a harness routing mechanism having a structure in which one end is a fixed end, and a middle part of the harness having the other end connected to the movable body is engaged with an operating portion of an urging member having an urging force in a certain direction.

[0006] Alternatively, a structure in which one end is a fixed end and the middle part of the harness connecting the other end to the moving body is hooked to a portion other than the turning fulcrum of the turning member biased in one turning direction. A harness routing mechanism is provided.

[0007] Further, the wiring mechanism of the harness having any one of the above-described structures can be configured such that a scanning body having a light source as a fluorescent lamp and a moving body having a ballast of the fluorescent lamp are moved at different speeds in the same direction. The present invention is applied to a harness for connecting a power supply and a ballast in an optical scanning device that is moved by moving.

[0008]

Embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a plan view of a harness routing mechanism using an urging member 2, showing a state where the moving body M is at point A, FIG. 2 is a view showing a state where the moving body M is at point B, and FIG.
5 is a plan view of a harness routing mechanism using the rotating member 3, in which the moving body M is at a point A, FIG. 4 is also a state in which the moving body M is at a point B, and FIG. FIG. 7 is a plan view of a harness routing mechanism using the moving member 4, in which the moving body M is at a point A, FIG. 6 is also a state in which the moving body M is at a point B, and FIG. FIG. 8 is a front cross-sectional view of the image reading device in the image processing apparatus having the same, FIG. 9 is a front cross-sectional view of the same, and FIG. Similarly, FIG. 11 is a view showing a state where the scanning body is at the middle position of the movement, and FIG.

First, embodiments of the harness routing mechanism shown in FIGS. 1 to 6 will be described. 1 and 2, there is provided a harness H having one end as a fixed end F and the other end connected to a moving body M. The moving body M has a distance from the fixed end F which increases or decreases as shown in the drawing. Move between point A and point B. A tension pin 1 is fixed near the fixed end F and is attached to the harness H. A fixed end 2a is provided between the fixed end F and the tension pin 1.
Urging member 2 made of an elastic body such as a telescopic spring having
And the harness H is hooked on the free end 2b (operating portion) of the biasing member 2. The free end 2b of the urging member 2 is urged (with the urging force f1) toward the fixed end 2a, and the direction of this urging coincides with the direction in which the harness H is bent with the movement of the moving body M. .

In the above structure, as shown in FIG.
When the moving body M is at the point A which is farther from the fixed end F side,
The harness H is in a stretched state against the urging force f1 of the urging member 2 and is provided with a tension force by the tension pin 1. Then, as shown in FIG. 2, when the moving body M approaches the fixed end F and moves to the point B side, the urging force f1 of the urging member 2 causes the tension pin 1 of the harness H and the fixed end F to move. At the free end 2b is pulled toward the fixed end 2a. In this way, the bending of the harness H is restricted in the biasing direction of the biasing member 2, and no bending occurs in other portions.

However, in the harness routing mechanism shown in FIGS. 1 and 2, the amount of contraction L of the urging member 2 must be increased. At this point, the space for disposing the urging member 2 and the bending portion of the harness H is long in this direction (in the transverse direction to the moving direction of the moving body M), and restricts the disposition of other members. In addition, the housing for accommodating the housing must have a long shape in this direction. The harness routing mechanism shown in FIGS. 3 and 4 or FIGS. 5 and 6 has solved this problem and made it possible to make the bent portion of the harness compact.

First, the wiring mechanism of the harness shown in FIGS. 3 and 4 will be described. A turning member 3 is provided instead of the urging member 2 in the structure shown in FIGS.
The turning member 3 is pivotally supported at one end by a turning fulcrum pin 3a,
The other end is a turning end, on which a turning end pin 3b is projected. An urging force f2 is applied in a fixed rotation direction about a rotation fulcrum provided with the rotation fulcrum pin 3a. The turning end (the side on which the turning end pin 3b is provided) is moved by the urging force f2 in the direction in which the harness H extends due to the movement of the moving body M to the point A, that is, in the direction opposite to the tension direction (for example, orthogonally). 3), and when the moving body M is at the point A as shown in FIG. 3, the harness H is in an extended state against the urging force f2 of the rotating member 3. However, as shown in FIG. 4, when the moving body M moves from the point A to the point B, the tension of the harness H is released, and the turning end of the turning member 3 is centered on the turning fulcrum by the urging force f2. To rotate.
At this time, the rotation end pin 3b and the rotation fulcrum pin 3a hook the harness H and rotate while winding. 1 and 2
In the illustrated mechanism, since the harness H is pulled in the lateral direction in a folded state, the harness H needs a long bending space in the left-right direction. However, in FIGS. 3 and 4, the mechanism illustrated in FIGS. 1 and 2 is used. In comparison with the above, although a space is required in the moving direction of the moving body M, a long space in the left-right direction is not required for the rotation of the rotating member 3 and the winding of the harness. Then, as shown in FIG. 3, when the moving body M moves from the point B to the point A, the harness H extends, and the harness H comes off the turning fulcrum pin 3a, but the harness H is hooked on the turning end pin 3b. In this state, the rotating end is pulled by the harness H, and is pulled toward the extension side of the harness H against the urging force f2.

As described above, the wiring mechanism of the harness shown in FIGS. 3 and 4 can be made more compact than the mechanism shown in FIGS. 1 and 2, but the rotation fulcrum pin 3a for hooking the harness H and the rotation The moving end pin 3b must be provided on the rotating member 3. The mechanism shown in FIGS. 5 and 6 has a structure in which the harness H is pulled in a certain direction, instead of being wound, by the rotating member 4 from which these pins have been removed.
That is, one end of the rotation member 4 is a rotation fulcrum 4a,
It is urged by the urging force f3 to rotate in a fixed rotation direction around the rotation fulcrum 4a, and the opposite side of the rotation fulcrum is a rotation end to which the urging force f3 is applied. And a through hole 4b for passing the harness H therethrough. The principle is the same as that of pulling by the urging member 2, but the pulling direction is not simply the direction perpendicular to the direction of extension of the harness H, but is pulled along the turning trajectory of the turning member 5, Since the harness H is bent along the rotation locus, a long space in the left-right direction is not required. As shown in FIG. 6, as the moving body M moves from the point A to the point B, the rotating end of the rotating member 4 is moved by the biasing force f3 to the fixed end F that has passed through the through hole 3b.
-The harness H between the tension pins 1 is pulled in a folded state. On the other hand, as shown in FIG. 5, when the moving body M moves from the point B to the point A and extends the harness H, the turning end of the turning member 4 is pulled by the harness H against the urging force f3.

As described above, in the mechanism shown in FIGS. 5 and 6, by pulling the harness H in a certain bending direction by the rotation of the rotating member 4, there is an advantage of the mechanism shown in FIGS. In addition, the bending space of the harness H can be made compact, and in addition to this, as compared with the mechanism shown in FIGS. This eliminates the need for the pin 3a and the rotating end pin 3b, which contributes to a reduction in the number of parts.

As an application example of the above-described harness routing mechanism, an image reading apparatus using the optical scanning apparatus shown in FIGS. 7 to 11 will be described. This image reading device is covered by a reading case 5 and disposed above the image processing device. Below the image reading device, image information of a document read by the present image reading device or an image transmitted A recording section P for recording on recording paper based on the information is provided.

A schematic configuration of the image reading device will be described. As shown in FIGS. 7 and 8, on the upper surface of the reading case 5, a stationary document placing surface 6 made of a transparent member such as glass and a continuous document feeding section 8 are provided. An original such as a book is placed on the stationary original placing surface 6 in a stationary state, and the scanning body is moved below the original (inside the reading case 5) for scanning and reading. On the other hand, one or a plurality of originals can be continuously fed to the continuous original feeding unit 8, and a scanning body is arranged below the continuous originals and the originals are fed. It performs scanning and reading.

As a member for scanning and reading, first, a photoelectric conversion unit 11 having a lens 11a and a photoelectric converter 11b is fixedly provided at the bottom in the reading case 5, and a protective cover 12 is provided above the photoelectric conversion unit. Covered. In the protective cover 12, no side portion is provided on the side where the later-described inverter unit 15 is provided, and a low-pressure harness H1, a high-pressure harness H2, and the like described later can pass therethrough.

As a scanning body to be moved when reading a still original, there are a first scanning body 9 and a second scanning body 10. The first scanning member 9 includes a fluorescent lamp 9a as a light source and a first mirror 9b, and the second scanning member 10 includes a second mirror 10
a, and a third mirror 10b is provided horizontally below the lower mirror 10b in a horizontal direction orthogonal to the transport direction. As a reading method, the fluorescent document 9a irradiates the stationary document placing surface 6 or the fed document reading unit 7 provided at the lowermost part of the continuous document feeding unit 8, and the content of the document thereabove is illuminated. The image is reflected by the first mirror 9b. The image reflected on the first mirror 9b is
The image is projected on the lens 11a through the second mirror 10a and the third mirror 10b, and the image content is converted to the photoelectric converter 11b.
Is converted into an electronic signal.

When reading a stationary document, the first scanning member 9 and the second scanning member 10 must be moved to move the light source and irradiate the entire surface of the document to perform reading. Both end portions of both scanning members 9 and 10 are slidably mounted on guide plates 18 and 18 provided on both inner surfaces of the reading case 5. Below the guide plates 18, a driving first pulley 19 and a driving second pulley 20 driven by a motor or the like serve as a transporting means for the scanning members 9 and 10, and the moving range of the scanning members 9 and 10. Are arranged on both left and right sides at the initial position (reading position of the continuously fed document).
9 and 20 are supported by the same shaft, and the first driving pulley 19 has a diameter twice as large as that of the second driving pulley 20. On both left and right sides of the moving end portions of both scanning bodies 9 and 10,
The driven first pulley 21 and the driven second pulley 22 are provided, and have the same diameter as the first driving pulley 19 and the second driving pulley 20, respectively. Then, the first transport belt 23 is provided between the first driving pulley 19 and the driven first pulley 21 on the same side, and the second driving pulley 2 on the same side is
0 and the driven second pulley 22
Has been wound. By rotating the drive first pulley 19 and the drive second pulley 20 which are supported by the same shaft and are integral, the transport speed of the first transport belt 23 is twice that of the second transport belt 24. Becomes

Both end portions of the first scanning member 3 are on a part of the first transport belt 23, and both end portions of the second scanning member 6 are on a part of the second transport belt 24. , Respectively. (The first scanning body 9 is fixed to the first conveyor belts 23 via the clamp portions 9c as shown in FIG. 8, as shown in FIG. 8.) Thereby, the first scanning body 9 and the second scanning body 10 Is transported, the first scanning body 9 moves at twice the speed of the second scanning body 10. First, FIG.
Is a state in which the first scanning body 9 and the second scanning body 10 are closest to each other, and this position is a position below the above-mentioned feeding document reading section 7, and in this state, both scanning bodies 9 The document 10 is stationary, and reads a document fed to the continuous document feeder 8.

When reading a still original placed on the stationary original placing surface 6, the scanning bodies 9 and 10 are moved from the initial movement position in FIG. At this time, the first scanning body 9 moves at twice the speed of the second scanning body 10. As a result, the distance during which the light L emitted from the fluorescent lamp 9a reaches the lens 11a of the photoelectric conversion unit 11 is always constant during movement. When the first scanning body 9 and the second scanning body 10 reach the end of the movement as shown in FIG. 11 through the middle position of the movement shown in FIG. 10, they reciprocate to return to the initial movement state of FIG. It is.
Of course, when returning to the state of FIG. 9 from FIG.
Is twice the speed of the second scanning body 10.

Now, the light source of the image reading apparatus of this embodiment is
It is a fluorescent light. In this case, an inverter as a ballast is required to stabilize the light source brightness. In the present invention, this inverter is separated from the first scanning body 9. First, a guide frame 14 is fixed to the bottom of the reading case 5 and an inverter unit 15 is engaged with the guide frame 14 so that the inverter unit 15 can slide along the guide frame 14. The inverter unit 15 has an inverter 16 mounted thereon. Then, as shown in FIG.
By fixing to the second transport belt 16 via the clamp portion 18a, the transport speed is the same as that of the second scanning body 10, that is, half the speed of the first scanning body 9.

As a result, the first scanning body 9 passes the inverter unit 15 from the state shown in FIG. 9 through the state shown in FIG. 10 to the end of movement as shown in FIG. And the inverter unit 15
It is not necessary to provide the storage space for projecting beyond the moving end of the first scanning body 9, so that the expansion of the reading case 5 can be avoided and the reading case 5 can be made compact.

With respect to the inverter unit 15, a power supply (not shown) disposed below the reading case 5 supplies a hole formed in the bottom of the reading case 5 and a harness guide attached to the hole. Via the member 13, the low-pressure harness H1
Are linked. The harness guide member 13 corresponds to the fixed end F in the harness routing mechanism shown in FIGS. 1 to 6, and the inverter unit 15 corresponds to the moving body M. That is, the low-pressure harness H1 corresponds to the harness H having one end as the fixed end F and the other end connected to the moving body M in FIGS. Therefore, FIGS. 1 and 6
For example, the routing mechanism shown in FIGS. 5 and 6 can be applied. That is, the tension pin 1 is disposed in the vicinity of the harness guide member 13 along with the low-pressure harness H1, and the low-pressure harness H1 between the harness guide member 13 and the tension pin 1 is connected to the rotating end of the rotating member 4. Through the through hole 4b.

The turning end of the turning member 4 is biased,
As shown in FIG. 9, the first scanning body 9 and the second scanning body 10 are at the movement initial position, and accordingly, the inverter unit 15 is moved to the movement initial position, that is, the point A of the moving body M in FIGS. In this case, the rotating member 4 is pulled by the low-pressure harness H1 against the urging force, and the low-pressure harness H1 is substantially linear. And
After the state of FIG. 10, the first scanning body 9 and the second scanning body 10 come to the movement end position as shown in FIG. 11, and the inverter unit 15 is moved to the movement end position corresponding to the point B in the movement area of the moving body M. Is reached, the portion between the tension pin 1 and the harness guide member 13 in the low-pressure harness H1 is pulled by the urging force of the rotating end of the rotating member 4, and flexes in a certain direction. Thus, interference with other members such as the photoelectric conversion unit 11 is avoided. Also, in the mechanism shown in FIGS. 1 and 2, it is necessary to increase the left-right width of the reading case 5 because it is necessary to take a space for bending in the left-right direction. In the illustrated mechanism and the mechanisms shown in FIGS. 3 and 4 using the rotating member 3, it is not necessary to make the width in the left-right direction too long when the harness is bent, and therefore, the reading case 5 can be compactly held. Can be.

On the other hand, the first scanning member 9 is output from the inverter 17.
High pressure harness H2 must be connected to the fluorescent lamp 9a. In this case, it should be noted that not only does the high-voltage harness H2 avoid interference with other members (for example, the photoelectric conversion unit 11), but also that the transport speeds of the inverter unit 15 and the first scanning body 9 are different. In addition, the movement distance of the high-pressure harness H1 itself increases due to the change in the distance between the two. Further, since the first scanning body 9 passes the inverter unit 15 through the state shown in FIG. 10 during the movement, the distance between the first scanning body 9 and the first scanning body 9 is once approached from the separated state, and then separated in the opposite direction. Will be lost. In this regard, the harness routing mechanism shown in FIGS. 1 to 6 is not configured assuming that the moving body M passes the fixed end F during the movement, and thus is not applied as it is.

If the amount of movement of the high-pressure harness H2 is large, the voltage is distorted, the brightness of the fluorescent lamp becomes uneven, and the image quality becomes unstable. Although such a problem does not occur if it is attached to the first scanning body 9, in the present invention, since the inverter 16 is separated from the first scanning body 9, the high-pressure harness H2 Is required not to move greatly and to be connected to the first scanning body 9 at a distance as short as possible.

Therefore, in the embodiment shown in FIGS. 9 to 11, an inverter unit 15 is used as another routing mechanism.
The first link 17a of resin molding is provided between
And the second link 17b are pivotally connected to connect the freely bendable harness link 17, and the high-pressure harness H2 is wired along this. When moving from the state of FIG. 3 to the state of FIG. 4 through the state of FIG. 4, the distance between the first scanning body 9 and the inverter unit 15 fluctuates.
The harness link 17 is bent. The high-pressure harness H2 is
By arranging along the harness link 17, the inverter 17 and the fluorescent lamp 9a are not connected to each other at a short distance and do not move greatly, and interference with the photoelectric conversion unit 11 is also avoided. .

[0029]

The present invention has the following effects by providing the above-described harness routing mechanism.
First, by adopting the configuration as in claim 1, the bending direction of the harness due to the movement of the moving body can be restricted to a fixed direction, and interference with other members can be avoided. In addition, since the bent portion of the harness is not formed by the structure of being hooked on the urging member, a decrease in durability due to a load on the bent portion can be solved.

According to the second aspect of the invention, in addition to the effect of the first aspect, the harness is more flexed on the rotation locus of the rotation member than the first aspect.
The width of the bent portion of the harness can be reduced, and the housing for housing the bent portion can be compactly held down.

According to a third aspect of the present invention, such a drawing mechanism is applied to a harness (low-pressure harness) connected between the light source of the optical system scanning device and the ballast, whereby the ballast moves. The amount of flexing of the harness can be regulated, interference with other members can be avoided, and the harness can be compacted, and the device housing of the image reading device can be compactly held. Further, an image can be stably provided and a good image reading apparatus can be provided.

[Brief description of the drawings]

FIG. 1 is a plan view of a harness routing mechanism using an urging member 2, in a state where a moving body M is at a point A. FIG.

FIG. 2 is a view showing a state where a moving body M is at a point B;

FIG. 3 is a plan view of a harness routing mechanism that uses a rotating member 3, and is a diagram illustrating a state where a moving body M is at a point A;

FIG. 4 is a diagram showing a state in which the moving body M is at a point B;

FIG. 5 is a plan view of a harness routing mechanism using a rotating member 4, and is a diagram illustrating a state where a moving body M is at a point A;

FIG. 6 is a diagram showing a state where the moving object M is at a point B;

FIG. 7 is a side sectional view of an image reading device in the image processing apparatus having a print function.

FIG. 8 is a front sectional view of the same.

FIG. 9 is a plan view of the reading case 1 in a state where the scanning body is at a movement initial position.

FIG. 10 is a diagram showing a state in which the scanning body is at a position on the way of movement.

FIG. 11 is a diagram illustrating a state in which the scanning body is at a movement end position.

[Explanation of symbols]

 H Harness H1 Low pressure harness H2 High pressure harness F Fixed end M Moving body 1 Tension pin 2 Biasing member 2a Fixed end 2b Free end 3 Rotating member 3a Rotating fulcrum pin 3b Rotating end pin 4 Rotating member 4a Rotating fulcrum 4b Through-hole 9 First scanning body 9a Fluorescent lamp 13 Harness guide member 14 Guide frame 15 Inverter unit 16 Inverter

Claims (3)

[Claims] 1. A harness puller, wherein a middle part of a harness having one end as a fixed end and the other end connected to a moving body is engaged with an operating portion of an urging member having an urging force in a certain direction. Turning mechanism. 2. A method in which one end is a fixed end, and a middle part of a harness connecting the other end to a moving body is hung on a portion other than a rotation fulcrum of a rotation member biased in one rotation direction. Features a harness routing mechanism. 3. The harness routing mechanism according to claim 1, wherein a scanning body having a light source which is a fluorescent lamp and a moving body having a ballast of the fluorescent lamp are the same. A harness routing mechanism, which is applied to a harness connecting between a power supply and a ballast in an optical scanning device that moves at different speeds in different directions.