JP4540769B2 - Copy machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a copying apparatus having a moving optical system that moves along a predetermined path under a platen glass and irradiates a document on the platen glass.
[0002]
[Prior art]
Conventionally, a moving optical system provided with a light source is moved along a predetermined path under a platen glass, a stationary original on the platen glass is irradiated, and the reflected light is read by a mirror provided in the moving optical system. Copiers configured to irradiate a photoreceptor are widely used. In this type of copying machine, the moving optical system may move due to vibration during transportation, transport, etc., and may be damaged. Therefore, a fixing screw is inserted from the outside of the apparatus housing, and the moving optical system is connected to the apparatus housing. It was done to fix to.
[0003]
[Problems to be solved by the invention]
However, in the configuration of such a conventional technique, in order to fix the moving optical system with a screw, it is necessary to perform tapping to form a screw hole with a screw groove on the frame of the moving optical system, resulting in a high cost. was there.
[0004]
That is, in the normal tapping process, first, a pilot hole is pressed in a member where a screw hole is to be formed, and then oil for protecting the tap is applied to the pilot hole, and then the tap is tapped into the pilot hole and screwed. A process called degreasing is performed to cut the groove and finally wash the tap protecting oil, and it is necessary to go through such a time-consuming process. In order to prevent the movement of the moving optical system at times, a costly tapping process has to be performed, which is uneconomical.
[0005]
In order to solve such a problem, a method of fixing with screws without tapping can be considered. That is, it is a method using a tap tight screw as a screw to be fixed. This tap tight screw has a substantially triangular cross-sectional shape of the outer diameter and valley diameter of the thread portion, and even if the thread groove is not cut in the other screw hole, It is a special type of screw that can be screwed into the hole. When this tap tight screw is used, there is no need to cut a screw groove in the screw hole formed in the moving optical system, so that it is only necessary to form a simple hole for inserting the tap tight screw in the moving optical system. . As a result, it is only necessary to perform the first pressing and drilling of the pilot holes among the plurality of steps necessary for the tap processing described above, and all the time-consuming steps can be omitted, thereby reducing the cost. Is possible.
[0006]
However, the method using the tap tight screw has a new problem that the work of fixing the screw becomes inefficient. That is, in the method using the tap tight screw, the tap tight screw is screwed in while forming a screw groove in the hole on the counterpart side, so that a large load (pressing force) is applied to the counterpart side. Here, since the other side is a moving optical system, if the direction in which the tap tight screw is screwed in is the moving optical system moving direction, when the tap tight screw is screwed in, the moving optical system is pushed and moves to escape. Become. Therefore, in order to fix the moving optical system using the tap tight screw, the operator performs the work of screwing the tap tight screw with one hand and pressing the moving optical system so that it does not escape with the other hand. Had to do. In general, the screw-in operation involves holding the screw with one hand and screwing it in with the other hand, so that one hand is taken by holding the moving optical system and the screw is removed. If it cannot be used for holding, the screwing operation becomes extremely inefficient and takes time, and there is a problem that the cost of screw fixing becomes high.
[0007]
The present invention has been made in view of such problems, and does not require tapping to fix the moving optical system for preventing breakage of the moving optical system during transportation, transportation, and the like, and fixing work thereof It is an object of the present invention to provide a copying apparatus capable of reducing the cost by making it possible to implement without inefficiency.
[0008]
[Means for Solving the Problems]
The present invention is to fix a moving optical system to a side wall by controlling a driving means for moving the moving optical system when the moving optical system is fixed to a side wall of an apparatus housing for transportation, transportation, etc. It is configured to hold in a predetermined position at a predetermined position in a non-moving state that does not move even when an external force is applied.
[0009]
With this configuration, when the moving optical system is fixed to the side wall of the apparatus housing, the moving optical system is in a fixed state for a predetermined time, so that it is not necessary for the operator to hold the moving optical system by hand. Therefore, even if the fixing means is fixed from the same direction as the moving direction of the moving optical system, the fixing means is movable when the fixing means is fixed like a tap tight screw. Even if a large pressing force is applied to the system, since the moving optical system does not move, the fixing means can be easily attached, and the cost required for fixing the moving optical system can be reduced.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
The copying apparatus according to the first embodiment of the present invention includes a moving optical system that irradiates a document on the platen glass along a platen glass attached to the apparatus housing, and a driving unit that moves the moving optical system. When, by the fixed operation from the same direction as the moving direction of the external from and the movable optical system of the device housing, and fixing means for fixing said movable optical system in a predetermined position relative to the side wall of the device housing, the fixed In operation, the moving optical system is provided with control means for controlling the driving means so as to hold the moving optical system in a stationary state in which it does not move even when an external force is received at the predetermined position .
[0011]
With this configuration, when the moving optical system is fixed to the side wall of the apparatus housing for transportation, transportation, etc. of the copying apparatus, when the control means is operated, the control means controls the driving means to move the moving optical system. Since the system is constrained so as not to move for a predetermined time to a predetermined position for fixing the system to the side wall of the apparatus housing, the moving optical system will not escape even if the moving optical system is not pressed by hand. The operator can easily and quickly perform the fixing work by fixing the fixing means to the moving optical system from the outside of the side wall of the apparatus housing, thereby improving the assembling efficiency and reducing the cost.
[0012]
In the copying apparatus according to the second aspect of the present invention, the driving means is provided with a stepping motor as a power source, and the control means continuously applies the same excitation pulse to the stepping motor for a predetermined time so as not to rotate. It is a configuration. With this configuration, in order to keep the moving optical system in a stationary state, it is only necessary to continuously apply the same excitation pulse to the stepping motor for a predetermined time, so that the control can be performed very easily and the brake is applied. Therefore, it is not necessary to use another component such as a device, so that the apparatus is not complicated.
[0013]
In the copying apparatus according to the third aspect of the present invention, in the copying apparatus according to the first or second aspect described above, the control means attaches the movable optical system at an arbitrary position based on a predetermined operation. It is configured to perform a series of processes for moving to a predetermined position adjacent to the side wall of the body, stopping at that position in a fixed state for a predetermined time, and releasing the fixed state after a predetermined time has elapsed. With this configuration, the movable optical system can be automatically fixed by operating the control means when the movable optical system is fixed to the side wall of the movable optical system, regardless of the position of the movable optical system on the path. For this reason, a series of processes from the process of moving to a predetermined position for maintaining the immovable state after the process to moving to a predetermined position until the automatic cancellation of the immobile state is performed after a predetermined time elapses, so that the fixing work of the moving optical system is reduced. It can be performed efficiently in the process.
[0014]
A copying apparatus according to a fourth aspect of the present invention is the copying apparatus according to each aspect described above, wherein the fixing means is a tap tight screw screwed into a screw hole formed in the moving optical system, and is formed in the moving optical system. The screw hole has a structure in which the screw groove is not cut. In this way, by using the tap tight screw as the fixing means, it is not necessary to cut the screw groove in the screw hole formed in the moving optical system, and the cost can be reduced by simplifying the screw hole forming process. When screwing a tap tight screw, it is screwed in while forming a thread groove in the screw hole on the other side, so a large pressing force acts on the moving optical system and the moving optical system tries to escape, but as described above Since the moving optical system is held stationary, it will not escape even if it is not held down by hand, and the tap tight screw can be easily screwed in, so as to improve assembly efficiency and reduce costs. Can do.
[0015]
A copying apparatus according to an embodiment of the present invention shown in the drawings will be described below. FIG. 1 is a schematic perspective view showing a platen portion of a copying apparatus according to an embodiment of the present invention, FIG. 2 is a schematic perspective view showing a moving optical system provided in the copying apparatus, a driving mechanism thereof, and the like, and FIG. It is a schematic sectional drawing explaining the state which fixes an optical system to a side wall. 1 to 3, 1 is an apparatus housing, 2 is a platen glass attached to the apparatus housing 1, and 3 is provided in the apparatus housing 1 so as to be movable along the platen glass 2. This is a moving optical system that irradiates the upper document. The moving optical system 3 has a frame 4 made of sheet metal, a light source 5, a mirror 6, and the like, and is fixed to the front surface of the frame 4 so that the moving optical system 3 does not move during transportation. The screw hole 7 is formed. The screw hole 7 is simply formed by pressing, and no thread groove is formed on the inner surface. By screwing the tap tight screw 8, the screw hole 7 is of a size that allows screw engagement while forming the thread groove. Is. Thus, since the tapped hole 7 is not tapped, it can be formed at a low cost.
[0016]
On the other hand, the side wall 10 of the device housing 2 facing the screw hole 7 is formed with a fool hole 11 for allowing the tap tight screw 8 to pass therethrough, and a cover disposed on the outer surface of the device housing 2. A hole 13 having a size that can be accommodated up to the head of the tap tight screw 8 is formed in 12. Thus, as shown in FIG. 3, the frame 4 of the moving optical system 3 is pressed against the side wall 10 of the apparatus housing 2, and the tap tight screw 8 is screwed from the outside of the side wall 10. The moving optical system 3 can be fixed to the side wall 10 of the apparatus housing 1 by screw engagement while forming a screw groove. In addition, what is necessary is just to employ | adopt a well-known thing suitably for the tap tight screw 8 used here.
[0017]
In FIG. 2, reference numeral 15 denotes a driving device that moves the moving optical system 3 along the platen glass 2. The driving device 15 includes a stepping motor 16 serving as a driving source, an endless belt 17 disposed along a traveling path of the moving optical system 3, and a belt 18 for transmitting the rotation of the stepping motor 16 to the belt 17. The moving optical system 3 is connected to the belt 17. Thus, the moving optical system 3 can be reciprocated by the reciprocating rotation of the stepping motor 16. Note that a second moving optical system 19 holding a mirror is provided between the moving optical system 3 and the side wall 10, and is configured to run on an endless belt 20 driven by a driving device 15. Yes. This moving optical system 19 does not move when the moving optical system 3 is fixed to the side wall 10 with the tap tight screw 8, so it does not have to be fixed to the side wall 10. The second moving optical system 19 may be fixed to the side wall 10 by the same structure as the moving optical system 3.
[0018]
FIG. 4 is a block diagram showing a drive control circuit of the stepping motor 16. The stepping motor 16 is configured to be driven and controlled by the scanner driving means 23 via the driver 22. The stepping motor 16 is configured to be rotationally controlled by appropriately exciting the four phases. The four phases are sequentially excited as shown in FIG. 7 (the state in which H in FIG. 7 is excited, L 8 is not excited), it can be rotated at a constant speed, and as shown in FIG. 8, it can be decelerated by gradually delaying the excitation switching timing, and after step 4 in FIG. By holding in an excited state with the pattern shown in FIG. 6 (referred to as a locking excitation pattern), the device can be locked in a state where it does not rotate even when an external force is applied. When the excitation to the stepping motor 16 is turned off, the stepping motor 16 does not naturally rotate by itself, but can be easily rotated by external force.
[0019]
FIG. 5 is a block diagram showing the control device 25 of the copying apparatus and each means connected thereto, and the scanner driving means 23 is configured to be controlled by the control device 25. The ROM 26 of the control device 25 stores data corresponding to various modes for controlling the scanner driving means 23. One of the modes is an optical system fixing operation mode (the operation of this motor is described later). (To be described later) is also stored.
[0020]
Next, an operation of fixing the moving optical system 3 to the side wall 10 of the apparatus housing 1 in preparation for transportation after manufacturing the copying apparatus will be described with reference to an operation flowchart of FIG. As described above, immediately after manufacture of the copying apparatus, the screw hole 7 formed in the frame 4 of the moving optical system 3 is simply formed by pressing, and no screw groove is formed on the inner surface. .
[0021]
First, the operator inputs an optical system fixing operation mode start by pressing a start key of the panel operation means (operation panel) 27 (ST1). As a result, the start key of the panel operating means 27 turns red and a message indicating that the key has been pressed is displayed on the display panel, and the operator is notified that the start key has been pressed (ST2). Next, the control device 25 executes the optical system fixing operation mode. That is, the stepping motor 16 is driven via the scanner driving means 23, and the moving optical system 3 is first moved toward the side wall 10 of the apparatus housing 1 regardless of the position, and approaches the side wall 10. At this point, the stepping motor 16 is decelerated by applying the excitation pattern shown in FIG. 8, and when the movable optical system 3 reaches a predetermined position (origin) for fixing to the side wall 10, the stepping motor 16 is excited for locking. A pattern is added to make a stationary state (locked state) (ST3). Then, the excitation is continued for a preset time (20 seconds in this embodiment), and the stepping motor 16 is held in an immobile state. In the meantime, as shown in FIG. 3, the operator screwed the tap tight screw 8 into the screw hole 7 formed in the frame 4 of the moving optical system 3 from the outside of the side wall 10 and fixed it while forming the screw groove. To do. At this time, the moving optical system 3 is strongly pressed in the moving direction by the tap tight screw 8, but the moving optical system 3 moves because the stepping motor 16 that drives the moving optical system 3 is locked and cannot rotate. There is no. Thus, there is no need to hold the moving optical system 3 by hand, and the tap tight screw 8 can be easily and quickly screwed into the screw hole 7 and fixed. Since this fixing operation can be normally performed in about 10 to 15 seconds, it can be sufficiently completed within a lock period of 20 seconds.
[0022]
When a predetermined time (20 seconds) elapses after locking the stepping motor 16 (ST4), the control device 25 releases the excitation of the stepping motor 16 and performs backup initialization to initialize the control contents (ST5). ). This is because the fixing work of the moving optical system is performed before shipment, and is performed in order to initialize the memory contents together with this work so that the shipment can be performed. Next, the panel display is set to “0” to notify the operator of the completion of the work (ST6). As a result, the operation is completed, and the copying apparatus is ready for transportation, transportation, and the like.
[0023]
As described above, the fixing operation with respect to the side wall 10 of the movable optical system 3 can be performed with a simple operation, and when the operation is completed, the control device 25 can be automatically switched to the normal operation state. Further, as a method of holding the moving optical system 3 in a stationary state in which it does not move even when it receives an external force, a method of adding a lock excitation pattern to the stepping motor 16 is adopted, so that extra parts such as a brake are required. It can be implemented without much cost increase.
[0024]
In the above-described embodiment, the tap tight screw 8 is used as a screw for fixing the moving optical system 3, and the screw hole 7 to be screwed in has no screw groove, thereby reducing the cost. However, the present invention is not limited to this configuration, and can be applied to the case of using a normal screw and a screw hole having a screw groove. That is, even when a normal screw is screwed into the screw hole, if the moving optical system 3 moves, it is difficult to screw in, and therefore it is necessary to hold down the moving optical system 3, so that the moving optical system 3 is not moved by applying the present invention. By restraining in this way, the screwing operation can be performed easily and promptly.
[0025]
【The invention's effect】
As is clear from the above description, the present invention controls the driving means for moving the moving optical system when fixing the moving optical system to the side wall of the apparatus housing for transportation of the copying apparatus, etc. Since the moving optical system is held at a predetermined position for fixing the moving optical system on the side wall for a predetermined time in an immovable state that does not move even when external force is applied, it is necessary for the operator to hold the moving optical system by hand. It is only necessary to attach a fixing means such as a screw from the outside of the side wall. For this reason, even when the fixing means is fixed from the same direction as the moving direction of the moving optical system, the fixing means is also a tap tight screw. Thus, even if a large pressing force is applied to the moving optical system at the time of fixing, the fixing means can be easily attached, and the cost required for fixing the moving optical system can be reduced. It has the results.
[0026]
Here, as a means for holding the moving optical system in a non-moving state, if a configuration in which the same excitation pulse is continuously applied to the stepping motor for moving the moving optical system for a predetermined time so as not to rotate is used, the stepping motor is simply stepped. The moving optical system can be held in an immovable state by controlling the excitation of the motor, and there is no need to use another component such as a brake. Therefore, the apparatus can be simplified and the cost can be further reduced.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view showing a platen portion of a copying apparatus according to an embodiment of the present invention. FIG. 2 is a schematic perspective view showing a moving optical system provided in the copying apparatus shown in FIG. 3 is a schematic cross-sectional view illustrating a state in which the moving optical system is fixed to the side wall. FIG. 4 is a block diagram showing a control circuit of a stepping motor. FIG. 5 is a block diagram showing a control device of the copying apparatus of FIG. 6 is a flowchart showing the operation of the control device when the moving optical system is fixed. FIG. 7 is a time chart showing an excitation pattern for steady rotation of the stepping motor. FIG. 8 is an excitation pattern for decelerating and then locking the stepping motor. Time chart [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Apparatus housing 2 Platen glass 3 Moving optical system 4 Frame 7 Screw hole 8 Tap tight screw 10 Side wall 15 Drive apparatus 16 Stepping motors 17 and 18 Belt

Claims (4)

A moving optical system for irradiating a document on the platen glass along a platen glass attached to the apparatus housing , a driving means for moving the moving optical system, an outside of the apparatus housing, and the moving optical system A fixing means for fixing the moving optical system at a predetermined position with respect to a side wall of the apparatus housing by a fixing operation from the same direction as the moving direction; and during the fixing operation, the moving optical system receives an external force at the predetermined position. And a control means for controlling the drive means so as to maintain the immovable state for a predetermined time.   The drive means includes a stepping motor as a power source, and the control means keeps the moving optical system stationary by applying the same excitation pulse to the stepping motor continuously for a predetermined time so as not to rotate. The copying apparatus according to claim 1.   Based on a predetermined operation, the control means moves the movable optical system at an arbitrary position to a predetermined position adjacent to the side wall of the apparatus housing, stops at that position for a predetermined time, and passes a predetermined time. 3. A copying apparatus according to claim 1, wherein a series of processing for canceling the immobile state is performed.   The fixing means is a tap tight screw that is screwed into a screw hole formed in the moving optical system, and the screw hole formed in the moving optical system has no thread groove. The copying apparatus according to any one of 3).

Images