JPS6032039A - Detector of copying machine or the like - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a detection device for detecting the position of a movable carriage provided in an optical scanning system of a copying machine or the like.

[Technical background of the invention and its problems]

In an image forming apparatus that uses light from a copying machine or the like to form an image on a document surface onto an image carrier such as a photoreceptor drum, an optical scanning system installed inside the main body includes an optical scanning system for exposure scanning of the document surface. A carriage is provided that supports a mirror and the like and moves back and forth. The position of such a carriage is detected in order to time the movement with other operating mechanism parts, and a detection device for this is installed in the main body in correspondence with the detection end of the carriage. - There are various detection methods, but generally the detection device is provided with a detection switch that is mechanically or optically sensitive to the detection end of the carriage.

FIG. 1 schematically shows a copying machine equipped with a conventional detection device 1. Here, an optical scanning system 3 installed in a main body 2 includes a light source 4 serving as an exposure rung and a reflector 5 surrounding it. A mirror 9 is provided on the first carriage 10 to receive the reflected light irradiated from the light source 4 through the float glass 7 of the document table 6 and onto the surface of the document 8 placed on the float glass from below. There is. Mirrors 12 and 13 are provided on the second carriage 11, which moves back and forth as shown by the arrow, following the horizontal reciprocation of this carriage, as shown by the arrow, and the light emitted from these mirrors is transmitted through the lens. 14. The light is projected via a mirror 15 onto a photosensitive drum 16 as an image carrier disposed at the bottom of the main body, and an image is formed there.

The detection device 1 of this copying machine is installed in the main body 2 corresponding to the detection end 11a of the carriage 11 in order to detect the position of the second carriage 1, and is normally stored inside the exterior cover 17 of the main body 2. ing. Detection switch 1 of the detection device
8 requires adjustment of the mounting position in order to perform highly accurate detection, and for this purpose, the switch 18 has a bracket-shaped movable member 19 that supports it, and a mounting screw 2 as a fixing means.
The range of the elongated hole 21, which is fixed to the main body via the screw 20 and inserted through the screw 20, can be adjusted by loosening the screw.

However, in order to adjust the position of the detection switch 18, the exterior cover 17 of the main body had to be removed from the main body each time, which was cumbersome during maintenance and inspection. There have been expectations for a detection device for a copying machine that is equipped with an adjustment function that allows adjustment work to be performed extremely easily by operation.

[Purpose of the invention]

The present invention has been made based on the above-mentioned circumstances, and its object is to detect a copying machine, etc., which can be easily manually adjusted from the outside without removing the exterior cover of the main body of the copying machine, etc. each time the adjustment is made. We are in the process of providing equipment.

[Summary of the invention]

In order to achieve the above object, the present invention basically forms an operation window in the exterior cover, and allows the fixing means such as fixing screws inside the main body to be manually operated through the window. We proposed that the detection switch be disposed opposite to the operation window, and that the movable member supporting the detection switch be provided with an operation end that can be directly operated from the outside through the operation window.

Such an operation window can be provided on the lower surface of the exterior cover or on the side surface. The operation end may be formed by a lever with a proximal end attached to the movable member and one end extending outward from the operation window, or a lever on the side of the movable member facing the operation window. It may also consist of a protrusion that can be externally operated with a tool such as a screwdriver.

[Embodiments of the invention]

Hereinafter, the present invention will be further explained with reference to the embodiments shown in Figs. 2 and 3.

The embodiment of the present invention shown in FIG. 2 is a detection device installed in the same subject machine as shown in FIG. 1, and the configuration of one copying machine is the same as that in FIG. Only the main part corresponding to the part including the second carriage 1 is shown enlarged here. Therefore, parts corresponding to those in FIG. 1 are given the same reference numerals.

Here, a detection switch 18 corresponding to the detection end i1m of the carrier 11 of the optical scanning system 3 is integrally attached to a bent end of a bracket-shaped movable member 19 with a screw or the like. This movable member 19 has an elongated hole 21 extending in the direction indicated by the arrow and the direction of reciprocating movement of the pawl carriage 11. A mounting screw 20 as a fixing means is inserted into the elongated hole 21, and a mounting screw 20 is inserted into the elongated hole 21. It is screwed into a bracket-shaped mounting member 22 fixed with screws or the like.

Therefore, when the mounting screw 20 is loosened, the fixation of the movable member 19 to the mounting member 22 is released and the length range of the elongated hole 21 is reduced.
Since the position of the switch 18 can be adjusted, the elongated hole 21 constitutes a means for allowing relative movement of the movable member.

An operation window 30 that communicates with the inside is formed in the lower surface portion 17a of the integral exterior cover 17 that houses the detection device, and the head of the mounting screw 20 is set to face the operation window 30. The movable member 19 is also provided with a lever 31 on the side facing the operation window 3o, one end of which extends slightly outward from the operation window 3o and a base end attached to the movable member. It constitutes an operating end that can be manually operated from the outside.

Therefore, with this configuration, if you want to adjust the position of the detection switch 18, you can leave the exterior cover 12 attached to the main body, and first attach it from the outside with a screwdriver through the operation window 3o as shown by the arrow. Loosen the screw 2o, then adjust and move the movable member 19 to an appropriate position by holding the end of the lever 31 that protrudes outside, and then tighten the mounting screw 2o again with a screwdriver to fix it.

In the case of this embodiment, since the operation window 3o is formed on the lower surface 27a of the exterior cover 17, even if the lever 3 is configured to protrude outward from the operation window 30, it is not noticeable and does not spoil the appearance. , there is no fear of it getting caught on the clothing of the person using the copying machine.

In the embodiment shown in FIG. 3, the operation window 3o is provided on the side 17b of the exterior cover 12.

Figure 3 shows the main parts of the copying machine similar to those in Figure 2 as seen from the top along the line ■-■ in Figure 2, and parts corresponding to those in Figure 2 are designated by the same reference numbers. It is attached.

The movable member 19 supporting the detection switch 18 corresponding to the detection gs11m of the carriage 11 is attached to the lower surface of the frame in the main body 2 or the exterior cover 17 by means of a mounting screw 20 inserted into a long hole 21 formed therein. 11m, and the mounting screw 2o is fixed to the mounting member 22 directly fixed to the operation window 3.
The fixation can be loosened by operating the screw head from the outside through the window as shown by the arrow with a screwdriver. This point is similar to the configuration shown in FIG.

What is different about this embodiment is that the operation end facing the operation window 3o is attached to a protrusion 32 on the movable member 19. , is provided integrally with the movable member 19 on the side facing the operation window 3o, or is fixed by an appropriate means, and a groove is formed in the movable member 19 to engage the end of a tool such as a screwdriver as shown by an arrow through the window 3o. ing.

Therefore, when adjusting the switch 18, first loosen the mounting screw 2o from the outside with a screwdriver through the window 3o,
Next, the movable member 19 may be moved by applying appropriate lateral force by applying a tool such as a screwdriver to the protrusion, and the screw 2o may be tightened again.

In the embodiment shown in FIG. 3, there is a protrusion 32 inside the operation window 3o, so even if the window 3o is provided on the side surface 17b, there is no problem in use or appearance. It is not limited to.

That is, in FIGS. 2 and 3, a mounting screw is disclosed as a fixing means, and a mode in which the head of the screw is operated from the outside with a screwdriver is shown. c-, Numes row #〒〒Total 18
Although the components are shown as separate from the main body or the exterior cover of the main body, it is of course possible to make them integral with the main body or the exterior cover. Furthermore, it is also possible in design to form an operation window on the side surface of the exterior cover, for example, in the side surface Ire that is perpendicular to the side J7b on which the operation window 30 shown in FIG. 3 is provided.

Further, the direction of adjustment movement of the switch 18 can be changed freely depending on the shape and size of the elongated hole 21.

In addition, it goes without saying that the present invention can be modified in various ways without departing from the gist of the invention.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to freely adjust the position of the detection switch on the external cover without removing the external cover one by one, and there is no substantial problem in appearance or use, and maintenance is possible. - It is possible to reduce inspection work and provide a detection device for copying machines, etc. with a simple structure.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view of a copying machine equipped with a conventional detection device, and FIG. 2 is an enlarged longitudinal cross-sectional view of a main part of an embodiment in which a detection device according to the present invention is implemented in a copying machine similar to that shown in FIG. 1. FIG. 3 is an enlarged cross-sectional view of the manufacturing part of a copying machine equipped with a detection device according to another embodiment of the present invention, taken along the line ``--'' in FIG. 2 and viewed from the side. 11... Carriage, 17... Exterior cover, 18.
-Detection switch, 19...Movable member, 30...Operation window, 31...Lever, 32...Protrusion. Applicant's agent Patent attorney Takehiko Suzue Figure 2 Figure 3 Procedural amendments Showa 69. , y7.1 ``'iS Manabu Shiga, Commissioner of the Patent Office1, Indication of the case Japanese Patent Application No. 58-1427612, Name of the invention Detection device for copying machines, etc.3, Person making the amendment Relationship with the case Patent applicant (307) Toshiba Corporation 4, Agent 5, Voluntary Amendment 7, Statement of Contents of Amendment, page 8, line 9, "as attached" is corrected to "as attached".

Claims (5)

[Claims] (1) In order to detect the position of a movable carriage provided in an optical scanning system of a copying machine, etc., a detection switch provided opposite the carriage, a movable member supporting the switch, and a detection switch provided in the optical scanning system of the copying machine etc. A mounting member provided on the main body side,
A fixing means that fixes the movable member to the mounting member and can loosen the fixation by manual operation; and a means that allows the movable member to move relative to the mounting member when the fixing means is loosened. In a detection device such as a copying machine, which is housed in the main body by the exterior force of the main body, an operation window is formed in the exterior cover, and the fixing means can be manually operated from the outside through the operation window. 1. A detection device for a copying machine or the like, characterized in that the movable member is provided with an operating end portion that is disposed opposite to an operating window and that can be manually operated from the outside through the operating window. (2) A detection device for a copying machine or the like according to claim 1, wherein the operation window is formed on a lower surface of an exterior cover. (3) A detection device for a copying machine or the like according to claim 1, wherein the operation window is formed on a side surface of an exterior cover. (4) The operation end portion is constituted by a lever having one end extending outward from the operation window and a base end attached to a movable member. A detection device such as a copying machine as described in . (5) The operating end portion is a protrusion that is provided on the movable member on the side facing the operating window and that can be operated from the outside with a tool such as a screwdriver through the operating window. A detection device for a copying machine, etc. according to any of Item 3.