JP2009009048A - Image forming device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image forming device having an electric wire fixing structure capable of preventing positional shift or falling off of the wire even in the case the wire is pulled in the various directions while improving the operability of fixing operation of the wire. <P>SOLUTION: A pair of claw parts 11 and 12 provided facing on the guide 26 protrusively for holding the binding band 13 by nipping the binding band 13 and the engaging part 11a and 12a provided to the pair of claws 11 and 12 and for engaging the wire 10 bound by the binding band 13. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an image forming apparatus such as a copying machine or a printer having a function of forming an image on a recording medium such as a sheet.

  Conventionally, in order to fix the position of an electric wire (including a plurality of electric wires) that can be wound around an image forming apparatus such as a laser beam printer, a bundled band that can be attached to and detached from the casing as shown in FIG. 14 is used. It was. As a method of using the bundled band shown in FIG. 14, an electric wire is passed through the ring 101 portion, and the foot 102 portion is attached to the housing side. At this time, by pressing the knob 103, it can be freely attached to and detached from the housing side.

Patent Document 1 discloses a shape as shown in FIG. 15 as a method of fixing an electric wire. In the invention disclosed in Patent Document 1, the electric wire 111 is shaped (pre-formed) in advance into the shape shown in FIG. 15 and engaged with the holder 110, and placed in a case prepared in other ways. This eliminates the push-in / pull-out of the wire and the disconnection from the top surface.
JP 2006-228872 A

  However, when a bundled band as shown in FIG. 14 is used, it is necessary to make a hole on the housing side so as to penetrate the portion of the foot 102 and to design the back side of the housing in detail while paying attention to interference and the like. was there.

  In addition, there has been a concern that the cost may be relatively high and the workability may be deteriorated because the attachment work needs to be performed while pressing the knob 103.

  Moreover, in the method using the shape currently disclosed by patent document 1, when the electric wire 111 is pulled from arbitrary places, an electric wire will move (especially in the direction parallel to an electric wire), and a position will shift | deviate. There is concern. Furthermore, since there is no positioning reference on the electric wire side, there is a concern that the position becomes ambiguous when the electric wire is engaged with the shape shown in FIG.

  The present invention has an electric wire fixing structure capable of improving the workability of electric wire fixing work and preventing the displacement and disconnection of the electric wire even when the electric wire is pulled in various directions. An object is to provide an image forming apparatus.

In order to achieve the above object, the present invention provides:
At least one wire,
A tightening member for tightening the electric wire so that the position with respect to the electric wire does not change,
A holding portion for holding the electric wire tightened by the tightening member;
In an image forming apparatus for forming an image on a recording material,
The holding portion is provided to protrude from the holding portion main body so as to face each other, and a pair of protruding portions that hold the fastening member by sandwiching the fastening member; and
An engaging portion that is provided on each of the pair of projecting portions and engages an electric wire tightened by the tightening member;
It is characterized by providing.

  Advantageous Effects of Invention According to the present invention, an electric wire fixing structure that improves workability of electric wire fixing work and can prevent positional deviation and disconnection of the electric wire even when the electric wire is pulled in various directions. It is possible to provide an image forming apparatus having

  The best mode for carrying out the present invention will be exemplarily described in detail below with reference to the drawings. However, the dimensions, materials, shapes, and relative arrangements of the components described in this embodiment should be appropriately changed according to the configuration of the apparatus to which the invention is applied and various conditions. It is not intended to limit the scope to the following embodiments.

(Example)
FIG. 9 is a schematic cross-sectional view showing a laser beam printer as an example of an image forming apparatus according to an embodiment of the present invention.

  In FIG. 9, reference numeral 50 denotes a printer main body as an image forming apparatus. An image forming unit 51 is provided in the printer main body 50 and forms an image by an electrophotographic method. The image forming unit 51 includes a photosensitive drum 52 that forms a toner image, a transfer roller 53 that transfers the toner image formed on the photosensitive drum 52 to the recording material S, and the like.

  In the image forming unit 51 having such a configuration, when an image forming operation is started, the laser scanner 54 first irradiates the photosensitive drum 52 with light according to the image signal, and the light according to such image signal is emitted. By irradiation, a latent image is formed on the photosensitive drum 52.

  Next, the toner image (visible image) is formed on the photosensitive drum 52 by developing with the toner stored in the latent image toner cartridge 55. In parallel with such a toner image forming operation, the recording material S is fed from the recording material storage cassette 56.

  Then, the recording material S is conveyed to a transfer unit constituted by the photosensitive drum 52 and the transfer roller 53 in synchronization with an image formed on the photosensitive drum 52 by the conveying roller 57 and the registration roller 58.

  In this transfer portion, the toner image is transferred to the recording material S by applying a bias to the transfer roller 53.

  The recording material S to which such a toner image has been transferred is then conveyed to the fixing means 59 and is heated by the fixing means 59 to fix the toner image. Is discharged to the discharge unit 61.

  FIG. 7 is a schematic view showing a main part in the laser beam printer of this embodiment. FIG. 8 is an enlarged view of a main part of FIG.

  In FIG. 7, 21 is a left-side sheet metal, 22 is a right-side sheet metal, 23 is a printed circuit board on which an electronic load is disposed, 24 is a resin member that holds the load device, and 25 is an upper sheet metal that connects the left-side sheet metal 21 and the right-side sheet metal 22. It is. Reference numeral 26 denotes a resin part guide having an electric wire fixing structure, and reference numeral 10 denotes an electric wire connecting the printed circuit board and the load device, and an electric wire having a bundled band as a fastening member described later.

A portion (area) 27 (hereinafter referred to as an electrical component fixing structure) applied as a holding portion, which is a characteristic configuration of the present embodiment, between the printed board 23 shown in FIG. 7 and the resin member 24 holding the load device. , A fixed structure 27) is provided.

  The resin member 24 that holds the load device is a portion that moves about 10 mm in the vertical direction (arrow direction shown in FIG. 7) when the front door of the laser beam printer is opened and closed.

  When assembling the electric wire 10 in such a machine and operating the laser beam printer, it is necessary to prevent failure / false detection due to slack, tension, tearing, etc. of the electric wire into the machine.

  Therefore, in this embodiment, in order to securely fix (hold) the electric wire 10 in the machine, the electric wire 10 is bound (clamped) using the bundled band, and the bundled band obtained by binding the electric wire 10 is fixed to the fixed structure portion 27. It is fixed with. Here, the number of electric wires bound by the bundle band may be plural or one. That is, at least one is sufficient.

  FIG. 1 is a schematic view showing a state where the electric wire 10 bound by the bundle band 13 is held by the fixed structure portion 27 in this embodiment. FIG. 2 is a schematic view showing the fixed structure portion 27 of the present embodiment. FIG. 3 is a schematic diagram showing the electric wire 10 bound by the bundle band 13 in this embodiment. FIG. 4 is a schematic diagram showing the bundled band 13 of the present embodiment. FIG. 5 is a schematic view showing a state where the electric wires 10 bound by the bundle band 13 are held by the fixed structure portion 27.

  As shown in FIG. 4, the bundle band 13 includes a head portion 13a, a band portion 13b having one end connected to the head portion 13a and the other end being a free end and movably held in the head portion 13a in one direction. Have The free end of the band portion 13b is held by the head portion 13a so as to form a ring, and can move only in the direction in which the diameter of the formed ring is reduced.

  With such a bundle band 13, the electric wires 10 are bound as follows.

  The electric wires 10 are bundled by the band portion 13b of the bundle band 13 shown in FIG. 4, and the electric wire 10 having the bundle band 13 as shown in FIG. 3 (in FIG. 3, it looks like one electric wire. It is an electric wire). At this time, as shown in FIG. 4, after passing the electric wire through the ring formed by the band portion 13b, the free end of the band portion 13b is moved to reduce the diameter of the ring, and the electric wire 10 is tightened ( Band together). When the electric wires 10 are bundled, the electric wires 10 are bundled so that the bundle band 13 and the electric wires 10 do not relatively move, that is, the position of the bundle band 13 with respect to the electric wires 10 does not change. Here, the position of the head portion 13a of the bundle band 13 that binds the electric wires 10 is not particularly limited.

  The electric wires 10 bound by the bundle band 13 in this way are fixed by the fixing structure 27 as shown below. This will be described below.

  In the fixing structure portion 27 provided in the wiring path of the electric wire 10, as a fixing structure of the electric wire, a pair of so as to face each other with a gap enough to accommodate the head 13 a of the bundle band 13 as shown in FIG. 4. Claw portions 11 and 12 as protruding portions are formed (see FIG. 2).

  In the present embodiment, the bundle band 13 that binds the electric wire 10 is held and fixed between the pair of claw portions 11 and 12, and the bundle band 13 is bound to the pair of claw portions 11 and 12. The position of the electric wire 10 is held and fixed by engaging the electric wire 10.

  FIG. 6 is a schematic view showing one claw portion 11 of the pair of claw portions 11 and 12, and is a view seen from the A direction in FIG.

  As shown in FIG. 6, the claw portion 11 is provided so as to protrude from a guide 26 as a holding portion main body, and the claw portion 11 has an engaging portion 11 a for engaging the electric wire 10. It protrudes from. Although the nail | claw part 12 is comprised similarly to the nail | claw part 11, as shown in FIG. 2, the protrusion direction of the engaging part 11a provided in the nail | claw part 11 main body and the nail | claw part 12 main body are provided. It is provided so as to be opposite to the protruding direction of the engaging portion 12a.

  Further, the claw portions 11 and 12 are provided with engaging portions 11a and 12a, respectively, so that insertion holes (11a1 shown in FIG. 6) are formed. The electric wire 10 is engaged with the engaging portions 11a and 12a by being inserted into these insertion holes.

  The gap (interval) between the pair of opposing claws 11 and 12 is desirably a gap that can accommodate the head portion 13a of the bundled band 13 to be sandwiched. That is, what is necessary is just to be provided so that the head part 13a of the bundle band 13 may contact the claw part 11 (or claw part 12) when the electric wire 10 is pulled. However, when the electric wire 10 is pulled, the band portion 13b of the bundle band 13 is not limited to this as long as the band portion 13b is provided to be restricted by the engaging portion 11a (engaging portion 12a). In other words, the insertion hole only needs to be provided in a size that restricts the passage of the bundle band 13. If it demonstrates in the nail | claw part 11 shown in FIG. 6, the dimension a (height of a protrusion part) and b (depth, width of the insertion hole 11a1) of the engaging part 11a (engaging part 12a) will be from the total external shape of the electric wire 10. A slightly larger value is desirable.

  The electric wire 10 is assembled by winding the inside of the machine with the load device side as a reference, and finally inserting the connector attached to the tip of the electric wire 10 into the printed circuit board 23.

  As described above, the electric wire 10 is fixed at the fixing structure 27 in the middle thereof (wiring path of the electric wire 10). The state where the electric wire 10 is fixed to the fixed structure portion 27 by such a method is shown in FIGS.

  As described above, according to the present embodiment, as a wiring work in the machine, it is not necessary to work while pressing the knob 103 as compared with the bundled band as shown in FIG. It is only necessary to perform wiring work in the machine while putting a bundle band between 12. Thus, workability can be improved when a bundled band as shown in FIG. 14 is used, or compared to the fixing method described in Patent Document 1.

  Further, according to this embodiment, the head 13a of the bundle band 13 is fixed, and at the same time, the electric wire 10 bound to the bundle band 13 is also fixed. As a result, when the electric wire is pulled in various directions as indicated by the arrows in FIG. 5 (including the front side direction with respect to the drawing of FIG. 5) when assembling the electric wire or operating the operating part in the machine. Even if it exists, the position of an electric wire is fixed reliably. Therefore, it is possible to prevent the electric wire from being pulled out, causing a positional shift, or coming off. Here, the near side direction with respect to the drawing of FIG. 5 is a direction in which the claw portions 11 and 12 protrude from the guide 26.

  Further, as the bundle band 13, a relatively inexpensive bundle band that is generally used for the purpose of bundling a plurality of electric wires into one can be applied. The cost is lower than using such a bundle band.

(Other examples)
Below, the modification of the nail | claw part 11 of the Example mentioned above is demonstrated. In the following description, only a modified example of the claw portion 11 of the pair of claw portions 11 and 12 will be described, but the claw portion 12 has the same configuration as the claw portion 11 as in the above-described embodiment. The claw portion shown here is also denoted by reference numeral 11 because the same effect as the claw portion 11 of the above-described embodiment can be obtained.

  10 to 13 are schematic diagrams illustrating modifications of the claw portion, and correspond to the claw portion 11 illustrated in FIG. 6.

  The claw portion 11 shown in FIG. 10 has an engaging portion 11b in which the height of the protruding portion is higher (larger than the dimension a) than the engaging portion 11a of the above-described embodiment. Here, reference numeral 11b1 shown in FIG. 10 is an insertion hole into which the electric wire 10 is inserted. When comprised in this way, the curve (curving degree, curvature) of the electric wire 10 engaged with the nail | claw part 11 can be made loose.

  The claw portion 11 shown in FIG. 11 is characterized by the shape of the insertion hole 11c1 into which the electric wire 10 is inserted. That is, the width of the inlet portion 11c2 of the insertion hole 11c1 is narrower than the wire holding portion (region) 11c3 that is provided on the bottom side of the insertion hole 11c1 and holds the electric wire 10. Here, the width of the inlet portion 11c2 is a width orthogonal to the insertion direction of the electric wire 10 inserted into the insertion hole 11c1. By comprising in this way, the electric wire 10 inserted in the insertion hole 11c1 and hold | maintained by the electric wire holding | maintenance part 11c3 can be made harder to pull out.

  Also in the claw portion 11 shown in FIG. 12, the width of the inlet portion 11d2 of the insertion hole 11d1 is larger than the electric wire holding portion 11d3 that is provided on the bottom side of the insertion hole 11d1 and holds the electric wire 10, as in the modification shown in FIG. Is narrowly provided. In the modification shown in FIG. 12, the electric wire holding portion 11 d 3 can be provided more widely, so that the electric wire 10 is more difficult to be pulled out, and it is possible to cope with a case where a large number of electric wires are bound by the bundle band 13.

  In the claw portion 11 shown in FIG. 13 as well, like the modification shown in FIGS. 11 and 12, the inlet portion 11e2 of the insertion hole 11e1 is provided rather than the electric wire holding portion 11e3 provided on the bottom side of the insertion hole 11e1 and holding the electric wire 10. Is provided with a narrow width. In the claw part 11 shown in FIG. 13, it is good to form by making a hole in the center part of the protrusion shape in a claw part, and providing the entrance part of the electric wire 10 from the upper side toward the hole provided in the center part.

As in the modification shown in FIG. 13, the width of the inlet portion 11e2 of the insertion hole 11e1 is narrow and the electric wire 10 is more difficult to be pulled out, and the bundle band 13 that binds the electric wire 10 is reliably regulated by the electric wire holding portion 11e3 In such a case, the opening directions of the insertion holes of the pair of claws may be matched. Thereby, the curve of the electric wire 10 fixed to the fixed structure part 27 can be eliminated, and the electric wire 10 can be wired linearly.
Moreover, since the electric wire 10 can be inserted from the same direction with respect to the insertion hole of a pair of nail | claw parts 11 and 12, the workability | operativity of wiring work can also be improved.

  As described above, also in the modified examples shown in FIGS. 10 to 13, it is possible to obtain the same effect as the above-described embodiment.

  The claw portions 11 and 12 described above do not necessarily have to exist in the up-down direction (vertical direction, the arrow direction shown in FIG. 7) in the machine, and may be provided in the horizontal direction, for example. Good.

  The image forming apparatus according to the present invention is not limited to the above-described embodiments and the modifications shown in FIGS. 10 to 13, and various modifications may be made without departing from the gist of the present invention. For example, you may make a slight shape change with respect to the nail | claw parts 11 and 12 of the Example mentioned above.

The figure which shows the state by which the electric wire which has a bundle band was assembled | attached to a pair of nail | claw part in the Example of this invention. Schematic which shows the fixed structure part of the Example of this invention. In the Example of this invention, the schematic which shows the electric wire bundled by the bundle band. Schematic which shows the bundle wire band of the Example of this invention. It is the schematic which shows the state by which the electric wire bound by the bundle wire band of the Example of this invention was hold | maintained at the fixed structure part. In the Example of this invention, it is the schematic which shows one nail | claw part 11 among a pair of nail | claw parts, and the figure seen from the A direction in FIG. 1 is a schematic diagram showing a main part in an image forming apparatus according to an embodiment of the present invention. The enlarged view of the principal part of FIG. 1 is a schematic diagram illustrating an image forming apparatus according to an embodiment of the present invention. Schematic which shows the modification about a nail | claw part. Schematic which shows the modification about a nail | claw part. Schematic which shows the modification about a nail | claw part. Schematic which shows the modification about a nail | claw part. Schematic which shows the conventional bundle band. The figure for demonstrating the fixing method of the conventional electric wire.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Electric wire 11, 12 Claw part 11a, 12a Engagement part 13 Bundling band 26 Guide 27 Fixing structure part 50 Printer main body

Claims (3)

At least one wire,
A tightening member for tightening the electric wire so that the position with respect to the electric wire does not change,
A holding portion for holding the electric wire tightened by the tightening member;
In an image forming apparatus for forming an image on a recording material,
The holding portion is provided to protrude from the holding portion main body so as to face each other, and a pair of protruding portions that hold the fastening member by sandwiching the fastening member; and
An engaging portion that is provided on each of the pair of projecting portions and engages an electric wire tightened by the tightening member;
An image forming apparatus comprising: The engaging portion includes an insertion hole into which an electric wire tightened by the tightening member is inserted,
The image forming apparatus according to claim 1, wherein the insertion hole is provided in a size that restricts passage of the fastening member. The insertion hole is provided with an inlet portion into which the electric wire tightened by the tightening member is inserted, and a width perpendicular to the insertion direction of the electric wire inserted into the insertion hole is wider than the inlet portion, and the inlet portion The image forming apparatus according to claim 2, further comprising: an electric wire holding unit that holds the electric wire inserted from the wire.

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