JPS60227248A - Mechanism for prohibiting movement of moving body - Google Patents

Abstract

PURPOSE:To prevent a moving body such as an original base of a copying device from moving while the upper machine body is held obliquely open by acting a detaining device provided between said moving body and a device body on a driving device for the moving body. CONSTITUTION:A ratchet wheel 30 is provided to a wire drum which moves back and forth the original base of the copying device. A shaft 31 is provided to a side plate 9 of an oscillation support 3 an a detaining member 32 is provided to the shaft 31. A detent pawl 33 engaging with the tooth part 30a of the wheel 30 is provided to one end of the member 32 and the turning habit in the direction where the pawl 33 is meshed with the wheel 30 around the shaft 31 is given to the member 32 by the elastic effect of the spring 34. The member 31 turns left while the other arm part 32a is pressed to a detaining pin 35 by the elastic force of the spring 34 when the support 3 is turned in the openig direction. The pawl 33 is then meshed with the tooth part 30a of the wheel 30.

Description

[Detailed Description of the Invention] The present invention supports a movable body such as a document table or an optical system in a reciprocating manner, and has an upper body which can be opened and closed with respect to the main body of the apparatus and can be opened from a horizontal position to an inclined position. The present invention relates to a movement prevention mechanism for a moving body that prevents the moving body from moving due to its own weight.

FIG. 1 shows an example of a copying apparatus to which the present invention is applied. The upper body of this copying machine can be opened and closed, and the sheet passage can be completely opened. That is, in FIG. 1, the base of a swing support 3 is pivotally attached to the shaft 2 of the apparatus main body 1, and the optical system 4 is attached to the main body 3.
, a charger 5, a fixing device 6 on the upper side, and the like are attached.

Further, a shaft 7 on which a photoreceptor drum 11 is fixed is supported on both side plates 8.9 (see FIG. 2) of the swing support 3. The swinging support body 3 equipped with these devices can be manually rotated about the axis 2 from a closed horizontal position in normal use to an inclined position, As already mentioned, the sheet path is fully opened, making it extremely easy to remove jammed paper, replace the photoreceptor, or perform maintenance operations.

Now, a movable body, that is, a document table 12 is provided on the upper part of the above-mentioned swing support 3, so that the document table 12 can freely move back and forth.
2 has bearings 13 on both side plates 8.9 as shown in FIG.
, and is supported by supporting means such as a sliding ball 14, and is movable with an extremely light load. Original table 12
When copying is performed, as shown in Figure 3,
It reciprocates by a stroke S, and when moving forward in the direction of arrow a, slit exposure is performed on the photoreceptor of the photoreceptor drum 11 (see FIG. 1). Incidentally, the drive mechanism for reciprocating the document table 12 is as follows. That is, in FIG. 4, the photosensitive drum 1
A forward gear 15 is fixed to the shaft 7 of 1, and a forward gear 16 is rotatably supported. Electromagnetic clutches 19 and 21 are provided between the wire drum 18, which is pivotally mounted on the shaft 7, and the two gears, and when one of the electromagnetic clutches 19 is energized, it is constantly rotated in the direction indicated by the arrow by the drive pinion 22. The forward movement gear 15 and the wire drum 18 are connected, and the drum 18 rotates in the same direction, pulling the wire 24 through the pulley 23, and moves the document table 12 forward in the direction of arrow a, as shown in FIG. let On the other hand, during double-acting, the electromagnetic clutch 21 is excited, and the driving pinion 25 connects the double-acting gear 16, which rotates in the direction of arrow C, to the wire drum 18, which rotate in the same direction, as shown in FIG. The document table 12 is moved back as shown in FIG.

By the way, when no copying operation is being performed,
The electromagnetic clutches 19 and 21 are in a disengaged state, and therefore the wire drum 18, which is pivotally mounted on the shaft 7, is disconnected from its drive mechanism, and as shown in FIG. 12 can be moved freely manually.

In this state, for example, when the swing support 3 is opened from a horizontal position to an inclined position about the shaft 2 as shown in FIG.
will move in the direction of the arrow due to its own weight, which is extremely inconvenient in terms of functionality and operation.

An object of the present invention is to provide an apparatus in which an upper body such as the above-mentioned swinging support body can be opened and closed with respect to the main body of the apparatus, and a movable body such as a document table provided on the upper body is opened in a tilted position. The purpose is to prevent the device from moving when the device is in a closed state, and to prevent functional and operational problems from occurring.

The present invention will be described below with reference to an illustrated embodiment. In FIG. 4, a ratchet wheel 3 is attached to a wire drum 18.
0 are provided integrally or substantially integrally. Further, as shown in FIG. 5, a shaft 31 is attached to the side plate 9 (see FIG. 2) of the swing support 3 so as to protrude from the side plate 9, and a locking member 32 is pivotally attached to the same shaft 31. At one end of the locking member 32, a locking pawl 33 that engages with the teeth 30a of the ratchet shaft 30 is provided. The retaining pawl 33 is given a rotational habit in the direction of engagement with the ratchet transfer 30. An immovable locking pin 35 is provided on the side plate of the device main body l, and the other end 32a of the locking member 32 is engaged with this to prevent the above-mentioned tendency to rotate in the counterclockwise direction. I'll let you. In this way, the locking device in this embodiment is constructed.

Now, FIG. 5 shows a state in which the swing support body 3 is placed in a horizontal position, and in this state, the locking pawl 3 of the locking member 32 is
3 is away from the teeth of the ratchet port 30. here,
When the swing support 3 is rotated in the opening direction as shown in FIG. 1 in order to remove the sheet due to a jam,
The document table 3 tries to move in the direction of the arrow due to its own weight, and as a result, the ratchet transfer 30 via the wire 24 tries to rotate in the direction of the arrow as shown in FIG. 6th
The figure shows an initial state in which the swing support 3 is about to be opened, and as a result, the other arm 32a of the locking member 32 is about to separate from the locking pin 35 as shown in FIG. However, due to the elasticity of the spring 34, the other arm portion 32a is in contact with the locking pin 35, and in this state, the locking member 31 is held against the shaft 3.
1, it rotates to the left from the original position shown by the imaginary line in FIG. 5, that is, in FIG. As a result, the ratchet transport 30 is prevented from rotating in the direction of the arrow,
Therefore, movement of the document table 12 in the direction of the arrow (see FIG. 1) is prevented. That is, this operation also results in automatic locking. Then, the locking pawl 33 is attached to the ratchet shaft 3.
0, the other arm portion 32a of the locking member 32 separates from the locking pin 35, and subsequently engages with the second swing support 3.
The above-mentioned locked state is maintained along with the opening operation. Therefore, regardless of the opening angle of the swing support 3, movement of the document table 12 is prevented.

Next, when closing the swing support 12, as shown in FIG.
5, the locking member 32 rotates to the right around the shaft 31 against the elasticity of the spring 34, and the locking pawl 33 separates from the tooth portion 30a of the ratchet shaft 30 as shown by the imaginary line.
The locking operation is automatically released. As described above, automatic locking and unlocking operations are possible with a simple configuration, which has the advantage of being easier to operate than manual locking.

Incidentally, the present invention can also be applied to a type of copying apparatus in which an upper body opens and closes and an optical system supported by the upper body and functioning as a moving body moves with a predetermined stroke. That is, FIG. 7 shows an example of the above-mentioned type of copying machine, in which the upper body, that is, the swinging support 41 can be opened in the direction of the arrow with respect to the main body 40 about the shaft 42. There is. As shown in the figure, the swing support 41 includes a light source lamp 43, a first mirror 44, a second mirror 45, an in-mirror lens 46, and a fourth mirror 47.
An optical system consisting of the following is stored. A light source lamp 43, a first mirror 44, and a second mirror 45 in this optical system
etc., are arranged to move at a predetermined speed and over a predetermined optical distance, as described below.

That is, in FIG. 8, a gear 49 rotated by a drive pinion 48 on the drive side that can be rotated in forward and reverse directions.
An electromagnetic clutch 52 is interposed between the fixed pulley 51 and the fixed pulley 51, and when the fixed pulley 51 is rotated in the direction of the arrow by being excited at the appropriate time, the electromagnetic clutch 52 is connected to the supporting member 54 via the wire 50 and the fixed pulley 53. A movable pulley 55 rotatably supported is moved in the direction of the arrow. Further, by the operation of the movable pulley 55, the first mirror 44 fixed to the support member 58 to which the wire 50 is fixed moves in the direction of arrow d together with the light source lamp 43, and the second mirror 45 moves in the same direction. Moreover, it is configured to move at 1/2 the speed of the first mirror 44. Through this moving operation, that is, the reciprocating operation, an electrostatic latent image corresponding to the document placed on the immovable document table 59 is formed in accordance with the rotational operation of the photosensitive drum 50 as shown in FIG. In addition, during the backward movement, the drive pinion 48 is reversed, the electromagnetic clutch 52 is excited, and the fixed pulley 51 is rotated in the direction opposite to the direction of the arrow, thereby causing the above-mentioned movable optical system to move back. There is.

Incidentally, in this type of copying apparatus, as shown in FIG. 7, the passage for moving the copying sheet is usually disposed below the optical system housed in the swing support 41. Therefore, from this point of view of the arrangement and configuration, when the swing support body 41 is opened in an inclined position to open the passage, the above-mentioned movable optical system does not move due to its own weight when in the inclined position. This will result in That is, in FIG. 8, when the drive mechanism is inactive, that is, when the electromagnetic clutch 52 is inactive, the fixed pulley 51 can rotate freely relative to the shaft 61, and therefore the guide stay 5
The optical system such as the first mirror 44 and the second mirror 45 guided by 6.57 can be reciprocated manually, and when the swing support 41 is in the tilted position, the movable optical system and the The supporting members will move in the forward direction due to their own weight. Therefore, the ratchet shaft 62 is provided integrally or substantially integrally with the fixed pulley 51 which is rotatable with respect to the shaft 61, and the locking member 63
The side plate (not shown) of the swing support 41 (see Figure 7)
Provided for.

Furthermore, a locking pin (
(not shown) to make the embodiment section as shown in FIG. With this configuration, similarly to the embodiments described above, it is possible to prevent the optical system as a movable body from moving due to its own weight, and therefore there is no fear that the function of the optical system will be impaired.

By the way, FIG. 9 shows another embodiment of the present invention.
The swing support 71 is connected to the shaft 7 on the device main body side with respect to the device main body 70.
The support body 71 supports a movable body 73 such as a document table so as to be able to reciprocate as in the previous embodiment. Sawtooth teeth are formed on the lower part of the movable body 73, and a claw portion 74a formed at one end of a locking member 74 pivotally connected to the shaft 72 can be engaged with the teeth. ing.

That is, in FIG. 9, a central spring 69 is connected to the locking member 74, and when the swing support 71 is rotated in the direction of opening, the lower edge 73a of the base side of the movable body 73 is engaged. The other end of the stop member 74 is pressed to rotate the member 74 to the right. Then, when the member 74 is rotated to the right to a certain position,
The member 74 is forcibly rotated by the elasticity of the tab 69, and at this time, the claw portion 74a engages with the above-mentioned teeth as shown in FIG. At this time, the movable body 73 tries to move in the direction of the arrow, but this movement is blocked by the locking member 74, and furthermore, due to the tendency of the movable body 73 to move to the right due to its own weight, the locking member 74 engages with the movement. is reliably maintained. Note that when the swing support body 71 is closed, the locking member 74 rotates to the left together with the movable body 73, and after passing the center point, the locking member 74 is forcibly rotated by the elasticity of the spring 69. At this time, the claw portion 74a separates from the teeth of the movable body 73.

By configuring the locking device as described above, the movement of the movable body can be prevented, but in addition to this, the 11th
A configuration as shown in the figure may be used.

That is, a locking part 83 having serrated teeth is pivotally attached to a shaft 82 that supports a swinging support 81 in the apparatus main body 80 so as to be openable and closable, and the handle 83a is grasped to swing the swinging support 81 as shown in FIG. The movement of the movable body may be prevented by rotating the movable support body 81 in the opening direction and engaging the locking member 85 provided on the movable body 84 with the serrated teeth.

As described above, according to the present invention, when the upper body, such as a swinging support that can be opened and closed with respect to the main body of the apparatus, is opened in an inclined position, a document table and an optical system that are reciprocally provided thereon are provided. It is possible to prevent the moving pairs such as the above from moving due to their own weight, and it is possible to prevent functional and operational problems caused by the movement.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an example of a type of copying device with a moving document table to which the present invention is applied, FIG. 2 is a longitudinal cross-sectional view of the document table in the above device, and FIG. FIG. 4 is a front view schematically showing a mechanism for moving an amount, FIG. 4 is a perspective view showing an example of the mechanism, FIG. 7 is a front view showing an example of a type of copying machine in which the optical system moves, to which the present invention is applied, and FIG. It is a perspective view showing an example of a drive mechanism. FIG. 9 is a front view showing another embodiment of the present invention, FIG. 10 is a front view showing a mode in which the movement of the movable body in the same embodiment is blocked, and FIG. 11 is a front view showing another embodiment of the present invention. FIG. 12 is a front view showing a mode in which the movement of the movable body in the above embodiment is blocked. l, 40... device main body, 3.41... rocking support body,
12.43.44.45...Moving object. 2- 1 Procedural Amendment December 12, 1980 Director General of the Patent Office Patent Application No. 237842 of 1988 2 Name of the invention Movement prevention mechanism for moving bodies 3 Person making the amendment Relationship to the case Patent applicant name Name (674 ) 4th generation manager of Ricoh Co., Ltd. Address: 4-5-4 Kyodo, Setagaya-ku, Tokyo
"Detailed Description of the Invention", "Brief Description of Drawings" columns and drawings (1) From the beginning of the 3rd line from the bottom of page 10 of the specification cylinder to the 12th line of the same cylinder.
Delete up to the end of the 12th line of the page. (2) Add ``reliably by locking the drive mechanism directly connected to those members'' before ``prevention'' on page 12, line 17. (3) Delete the text from the word "Aru." in line 11 of page 13 to the end of line 15 of the section on the same page. (4) Delete drawings 9 to 12. Procedural amendment (method) % formula % 1. Indication of the case Patent Application No. 237842 of 1980 2. Name of the invention Movement prevention mechanism for mobile objects 3. Relationship with the previous case making the amendment Name of patent applicant Title (674) Ricoh Co., Ltd. 4, Agent Address: 4-5-4-6 Kyodo, Setagaya-ku, Tokyo Drawings subject to amendment 7 Contents of amendment As shown in the engraving of the drawing originally attached to the application (no change in content) ). 2 nif).

Claims (1)

[Claims] A swing support body that supports a movable body in a reciprocating manner and is rotatable from a closed state to an open tilted position when in use with respect to the main body of the device, and a drive mechanism that reciprocates the movable body. The copying apparatus has the above-mentioned copying apparatus, when the movable body is made reciprocally movable by the drive mechanism in a state where the swing support body is closed, and the swing support body is rotated in a direction in which the swing support body is opened. A movable body in which a locking device for preventing the movable body from moving due to its own weight is interposed between the movable body or a member that moves in conjunction with the movable body and the device main body. A movement prevention mechanism for a movable body, characterized in that a locking device acts on a part of the drive mechanism.