JPH11282094A - Fixing structure for carrier driving wire of image processor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily fix a wire to a driving pulley by holding a locking member fixed to the wire by an elastic locking recessed part which is formed at the driving pulley in a device for running the wire by winding up and feeding the wire by the rotation of the driving pulley around which the wire is wound by a proper number of times and driving a component connected to the wire. SOLUTION: The locking recessed part 21 of a shape to accept the locking member 55 fixed to the wire is formed on the peripheral surface of the driving pulley 20, and a withdrawing groove 22 is formed along a part of a concentric circle with the locking recessed part 21, and the locking recessed part 21 and the withdrawing groove 22 are connected with a communicating groove 23, and a spring tongue piece part 24 is formed at the periphery of the locking recessed part 21. When the locking member is inserted into the locking recessed part 21, the locking member 55 is held by the restoring force of the spring tongue piece part 24, so that the wire is fixed to the driving pulley 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing apparatus, such as a copying machine, a printer, a scanner, or the like, which reads an image of a document shown on paper and performs various processes, and drives a carrier for scanning the document. The present invention relates to a fixing structure for fixing a wire to be driven to a drive pulley around which the wire is wound.

[0002]

2. Description of the Related Art A carrier of a screen processing apparatus captures an image to be processed represented on a document and guides it to an image processing unit such as a CCD. For this purpose, a reflecting mirror for forming an optical path from the document to the CCD is provided. And the like, and the image is captured by scanning the carrier along the document. This scanning is carried out by connecting a carrier to a wire that is wound around a driving pulley that is rotated by the power of a motor and fed out, and the wire runs. One end of the wire is hooked in connection with the inner wall of the housing containing the carrier, and the other end is hooked on the inner wall of the housing via a tension spring such as a tension coil spring. A predetermined tension is applied to the wire so that the carrier performs a predetermined drive.
The intermediate portion of the wire is hung on a carrier or wound around a pulley rotatably supported by the carrier, and is fixed to the driving pulley and wound appropriately a number of times.

A conventional structure for fixing a wire to the driving pulley includes a method shown in FIG. Drive pulley 51
A substantially circular locking recess 52 is formed on the peripheral surface of the wire, and a wire holding groove having an appropriate length in the circumferential direction is formed continuously with the locking recess 52.
53 are continuous on both sides of the locking recess 52. On the other hand, a spherical locking member 55 is fixed to a predetermined position of the wire 54 fixed to the driving pulley 51. And this locking member 55 is adapted to be fitted into the locking recess 52,
Further, the wire 54 is held in the wire holding groove 53, and the wire 54 is fixed to the drive pulley 51 in a state where these are fitted.

[0004] The wire 54 is wound around the driving pulley 51 an appropriate number of times.
If it cannot be fixed to the
The positioning of the wire 51 may not be easily performed, and the wire 54 may be loosened during the winding operation, which may cause inconvenience to the drive mechanism.

[0005]

However, in the above-mentioned conventional fixing structure, since the locking member 55 is fitted into the locking recess 52, the locking recess 52 and the locking member 55 are fitted.
Depending on the processing dimensions, there is a possibility that it cannot be fitted, or it may be loosely inserted and easily fall off. It is sufficient to increase the processing accuracy, but the processing cost increases, and the cost of the apparatus itself increases.

SUMMARY OF THE INVENTION An object of the present invention is to provide an image processing apparatus in which, when a wire is fixed to a driving pulley, a locking member fixed to the wire is securely locked at a predetermined position of the driving pulley. An object of the present invention is to provide a carrier driving wire fixing structure.

[0007]

As a technical means for achieving the above object, a carrier driving wire fixing structure of an image processing apparatus according to the present invention scans a document placed on a document table. In an image processing apparatus for driving a carrier for moving by moving a wire connected to the carrier, a locking member having an appropriate shape is fixed to an appropriate position of the wire, and the driving pulley for fixing the wire is connected to the driving pulley. A locking recess for engaging with the locking member is formed, and a portion of the locking recess in contact with the locking member is provided with elasticity. When the locking member is engaged with the locking recess, locking is performed by this elasticity. It is characterized by holding the member.

When the locking member is fitted into the locking recess, the locking member can be easily fitted because it is appropriately bent by the elasticity of the locking recess. In addition, since the locking member is sandwiched by this elasticity, it is possible to securely hold the locking member and fix the wire to the drive pulley.

Further, the fixing structure according to the second aspect of the present invention
The elasticity of the locking recess is provided by the shape of the periphery of the locking recess.

When the driving pulley is formed, a locking concave portion is also formed at the same time, and the shape of the portion forming the locking concave portion is formed into a leaf spring-like shape. The member will be clamped.

As a structure suitable for forming the above-mentioned leaf spring-like shape, the fixing structure according to the third aspect of the present invention forms a suitably shaped escape groove outside the locking concave portion. It is characterized in that the locking member is sandwiched by a portion existing between the evacuation groove and the locking recess.

A tongue is formed at a portion between the retracting groove and the locking recess, and the tongue functions in the same manner as a leaf spring. That is, when the locking member is pushed into the locking recess, the tongue is appropriately bent and retreats to the retreat groove, and the locking member is clamped in a state where the locking member is fitted.

Further, the fixing means according to the invention of claim 4 is
The elasticity of the locking concave portion is provided by a material forming the locking concave portion.

In order to provide the locking recess with elasticity, it is possible to provide the locking recess with elasticity as described above, but by forming the locking recess with an elastic material such as rubber. Elasticity can also be provided. That is, when the locking member is pushed in, the locking concave portion itself expands appropriately due to the elasticity of the locking recess itself, thereby clamping the locking member.

When the locking recess is made of an elastic material, an elastic material is used only for a portion where the locking recess is formed, and the driving pulley itself can be formed of metal or synthetic resin. The fixing structure according to the fifth aspect of the present invention is configured such that a recess is formed in the drive pulley, and a recess member made of an elastic material in which the recess is engaged with the locking member is housed in the recess. The concave recess member constitutes the locking concave portion.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A fixing structure of a carrier driving wire of an image processing apparatus according to the present invention will be specifically described below based on a preferred embodiment shown in the drawings.

First, an outline of a carrier driving mechanism will be described with reference to FIG. Housing 1 of image processing device
The first carrier 2 and the second carrier 2 are formed on a guide plate 1a formed by a step portion protruding from the inner surface of both side walls along the longitudinal direction.
The carrier 3 is placed, and the carriers 2 and 3 slide while rubbing the surface of the guide plate 1a. Reflectors (not shown) are appropriately combined and attached to the carriers 2 and 3, and an optical path for guiding an image of a document (not shown) placed on the upper surface of the housing 1 to an image pickup device (not shown) such as a CCD is formed. . When reading an image of a document, the document is scanned by sliding the carriers 2 and 3. During scanning, the optical path needs to be maintained at a predetermined length, so that the carriers 2 and 3 must move while maintaining a predetermined relationship.

A drive shaft 4 having an axial direction perpendicular to the scanning direction of the carriers 2 and 3 is rotatably supported at one longitudinal end of the housing 1, and a driven pulley is provided at the center thereof. 5 is fitted. This driven pulley 5
A drive belt 8 is stretched around the drive pulley 7 fitted on the output shaft of the motor 6. Driving pulleys 20 are fitted to both ends of the driving shaft 4 so as to be rotated by the driving shaft 4. A central portion of the wire 12 is wound around the driving pulley 20 by an appropriate number of turns. I have. On a side surface of the second carrier 3, a pair of guide pulleys 13 and 14 arranged in the scanning direction are supported rotatably about an axis perpendicular to the scanning direction. A guide pulley 15 is supported at an end of the housing 1 opposite to the side on which the drive shaft 4 is provided, so as to be rotatable about an axis perpendicular to the scanning direction. A bracket 1b is provided at an appropriate position on the side wall of the housing 1. In addition, these drive pulleys 20,
The wire 12, the guide pulleys 13, 14, 15 and the bracket 1 b are provided inside the housing 1 on both sides of the scanning area of the carriers 2 and 3.

One end of the wire 12 wound around the drive pulley 20 is hooked on the bracket 1b via the connecting portion 2a of the first carrier 2 and the guide pulley 13. The other end of the wire 12 is connected to the guide pulley.
The housing 1 is hung on a side wall of the housing 1 via a tension spring 16 formed of a tension coil spring or the like, sequentially passing through the guide pulley 15 and the guide pulley 14.

The wire 12 is similar to the wire 54 shown in FIG. 5, and a spherical locking member 55 is fixed to the wire 12 similarly to the wire 54. This wire 12
However, as shown in FIG. 2, it is fixed to the drive pulley 20 and wound appropriately.

On the peripheral surface of the driving pulley 20, a locking recess 21 is formed as shown in FIG. The figure surrounded by a circle in the figure is an enlarged view of the locking recess 21.
This locking concave portion 21 is adapted to fit the locking member 55,
It is formed by a circular groove. An escape groove 22 is formed outside the engagement recess 21 along a part of a circle concentric with the engagement recess 21, and a central portion of the escape groove 22 and the engagement recess 21 are connected by a communication groove 23. Have been. Therefore, as shown in the figure, an arc-shaped spring tongue piece 24 is formed between the locking recess 21 and the retreat groove 22.

Further, a wire holding groove 25 of an appropriate length is formed on both sides of the locking concave portion 21 along the circumferential direction of the drive pulley 20 continuously from the locking concave portion 21.

The operation of the embodiment of the fixing structure according to the present invention configured as described above will be described below.

The locking member 55 fixed to the wire 12 is fitted into the locking recess 21 while being pushed. At this time, the operation is performed while inserting the portions on both sides of the locking member 55 of the wire 12 into the wire holding groove 25. When the locking member 55 is pushed in, the spring tongue piece 24 is pushed outward and flexed toward the retreat groove 22 side. 55 is held by receiving the restoring force of the spring tongue piece 24, and the wire 12 is fixed to the drive pulley 20.
Then, the wire 12 may be wound around the driving pulley 20 a predetermined number of times.

FIG. 3 is a view showing another embodiment for providing the locking recess 21 with elasticity. On the outer side of the locking recess 21, a retreat groove 22 is formed along a part of a concentric circle with the locking recess 21, and both ends of the retreat groove 22 and the locking recess 21 are formed by a communication groove 26. Have been contacted. Therefore, in the portion surrounded by the locking recess 21, the retreat groove 22, and the communication groove 26, the spring tongue whose base end is located on the bottom surface of the locking recess 21 and whose free end is located on the surface of the drive pulley 20. A piece 27 is formed. Further, a wire holding groove 25 is formed continuously from the locking recess 21.

In the fixing structure according to the embodiment shown in FIG. 3, when the locking member 55 is inserted into the locking recess 21 while being pushed, the spring tongue piece 27 is appropriately bent outward, and its restoring force causes The locking member 55 will be clamped.
Thus, the wire 12 is fixed to the drive pulley 20.

The embodiment described here is a preferred embodiment of the present invention, and the present invention is not limited to the embodiment, and can be variously modified and implemented without departing from the gist. Of course. For example, in the present embodiment, as shown in FIGS.
Although the structure in which elasticity is provided by appropriately setting the surrounding shape of 21 has been described, elasticity may be provided by another method. For example, if the drive pulley 20 itself is formed of a rubber material or the like, and a circular groove is formed on the peripheral surface thereof, and this groove is used as a locking concave portion, if the locking member 55 is pushed into this locking concave portion, the driving pulley The locking concave portion is appropriately expanded by the material of the material 20, and the locking member can be held by the restoring force. Alternatively, the driving pulley 20 may be formed of a metal or a synthetic resin and formed into a tubular shape by using a rubber material. The driving pulley 20 may be embedded in a groove formed in the driving pulley 20 to form a locking recess. Even when the locking member 55 is pushed into the locking recess, the locking recess is expanded by the elasticity of the rubber, and the locking member 55 is sandwiched by the restoring force.

[0028]

As described above, according to the carrier driving wire fixing structure of the image processing apparatus according to the present invention, the wire is fixed to the driving pulley while holding the locking member by the elasticity of the locking recess. As a result, even if there is an error in the processing dimensions of the locking member, the locking member can be reliably and easily engaged with the locking recess, and the wire can be securely fixed to the drive pulley. it can.

Further, according to the carrier driving wire fixing structure of the image processing apparatus according to the second aspect of the present invention, the locking concave portion can be processed when the drive pulley is processed, and the wire can be securely connected with a simple structure. Can be fixed.

According to the carrier driving wire fixing structure of the image processing apparatus according to the third aspect of the present invention, the locking recess can be easily provided with elasticity with a simple structure.

Further, according to the carrier driving wire fixing structure of the image processing apparatus according to the fourth aspect of the present invention, when the drive pulley is machined, the locking recess may be formed in a shape suitable for the locking member. Therefore, the processing is further simplified, and the manufacturing cost can be reduced.

According to the carrier driving wire fixing structure of the image processing apparatus according to the fifth aspect of the invention, the driving pulley is provided with a desired strength and only the locking recess is provided with appropriate elasticity. be able to.

[Brief description of the drawings]

FIG. 1 is a plan view showing a fixing structure of a carrier driving wire of an image processing apparatus according to the present invention, in which an enlarged view of a locking recess is shown in a portion surrounded by a circle.

FIG. 2 is a front view of a driving pulley for fixing a wire by a fixing structure according to the present invention, which is partially cut away.

FIG. 3 is a plan view showing another embodiment of the fixing structure of the carrier driving wire of the image processing apparatus according to the present invention, in which an enlarged view of a locking concave portion is shown in a portion surrounded by a circle.

FIG. 4 shows a carrier of an image processing apparatus having a wire fixed to a driving pulley by a fixing structure according to the present invention;
FIG. 4 is a schematic perspective view illustrating a mechanism for driving by the wire.

FIG. 5 is a view for explaining a conventional wire fixing structure, and is a plan view corresponding to FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 1st carrier 3 2nd carrier 4 Drive shaft 6 Motor 12 Wire 20 Drive pulley 21 Locking recess 22 Retraction groove 23 Communication groove 24 Spring tongue piece 25 Wire holding groove 26 Communication groove 27 Spring tongue piece 55 Lock Element

Claims (5)

[Claims] An image processing apparatus for driving a carrier for scanning a document placed on a document table by moving a wire connected to the carrier, wherein the wire is appropriately locked at a suitable position on the wire. A driving pulley for fixing the wire, a locking concave portion for engaging with the locking member is formed, and a portion of the locking concave portion in contact with the locking member is provided with elasticity; Wherein the elastic member clamps the retaining member in a state where the retaining member is engaged with the retaining concave portion. 2. The elasticity of the locking concave portion is provided by the shape of the peripheral edge of the locking concave portion.
5. A fixing structure for a carrier driving wire of the image processing apparatus according to 1. 3. An evacuation groove having an appropriate shape is formed outside the locking recess, and the locking member is sandwiched by a portion existing between the evacuation groove and the locking recess.
A fixing structure for a carrier driving wire of the image processing apparatus according to claim 2. 4. The fixing structure of a wire for driving a carrier of an image processing apparatus according to claim 1, wherein the elasticity of the locking concave portion is provided by a material forming the locking concave portion. 5. An accommodation recess is formed in the drive pulley, and a recess member made of an elastic material having an engagement recess engaged with the engagement member is accommodated in the accommodation recess, and the engaging member is held by the recess member. 5. A stop recess is formed.
5. A fixing structure for a carrier driving wire of the image processing apparatus according to 1.