JPH0425699Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a document table sliding device in a copying machine in which a document table moves back and forth on the top surface of the machine. A document tray of a copying machine of a so-called document table moving type, in which one side of the document table is distributed approximately uniformly and moved relative to the center of the copying machine body by a sliding mechanism, or one side of the document table is moved relative to the copying machine body. This relates to moving equipment.

(Prior Art) Conventionally, as disclosed in Japanese Utility Model Application Publication No. 57-40961, a copying machine with a movable document table has been disposed above the machine body on one side in the direction of movement of the document table (contact glass). a first slidable member (a first fixed guide rail); a sliding mechanism that slidably supports the original document mounting table with respect to the first slidable member; It has a second slidable member (second fixed guide rail) which is disposed on the upper surface of the body on the other side in the moving direction and slidably supports the document placement table.

In such copiers with a movable document table, when the document table protrudes beyond the machine body in the direction of movement and the document table lifts up, the image focus shifts and the image becomes distorted. Since this also has an adverse effect on this, a restraining member is provided to prevent this.

(Problem to be solved by the invention) However, in the sliding device of the above-mentioned copying machine with a movable document table, when a large document protrudes from the document table, it is set and the document table is moved. In this case, the protruding portion of the original collides with the end of the holding member in the moving direction, causing the original to be displaced, resulting in a problem that copying must be performed again. Furthermore, if the original is thin, the worst case scenario may occur, such as damage to the original.

(Means for Solving the Problems) The present invention aims to solve the above-mentioned problems and drawbacks, and its configuration is based on a copying machine in which the original table moves back and forth on the top surface of the machine. The document table sliding device includes a first sliding member disposed above the machine body on one side in the movement direction of the document placing table, and a document plate sliding device for placing the document on the first sliding member. a sliding mechanism that slidably supports the document placement table; and a second slidable member that is disposed on the upper surface of the machine body on the other side in the moving direction of the document placement table and that supports the document placement table in a slidable manner. and a restraining member protruding from the upper surface of the machine in the vicinity of the second slidable member and disposed closer to the center in the direction of movement of the document table; In a document table sliding device for a copying machine, the document table slider has a holding member having a holding portion to prevent the document placing table from lifting up when the document placing table protrudes further than the original position. It is characterized in that an inclined surface is formed from the upper surface of the fuselage to the restraining part.

(Function) In the above-described configuration, the document placement table on which the document is set reciprocates using the first and second slidable members as guides by the driving force from the drive motor, and the document is A scan is performed.

When the document placing table reciprocates, the holding member corrects the inclination of the document placing table at one end or both ends, so that smooth reciprocating movement is achieved. In addition, if the original set on the document tray protrudes far beyond the document tray, even if the protruding document comes into contact with the presser when the document tray is moved, since the holding member has sloped surfaces at both ends. ,
It acts to smoothly overcome the above-mentioned sloping surface, and in particular, even if the original contacts the holding member at a position close to the top of the machine, it guides the original so that it passes over the upper end of the holding member along the sloping surface. Therefore, problems such as damage or misalignment of the original can be reliably prevented.

(Example) Hereinafter, the present invention will be described in detail based on an example.
FIG. 1 is an overall perspective view showing an embodiment of the present invention.
At the rear of the upper part of the body 2 of the copying machine, which is generally designated by the symbol A, a sliding mechanism 6 that supports a document placement table 4 is attached so as to be slidable relative to a first slidable member, which will be described later. A document pressing plate 8 is attached to the sliding device 6 so as to be openable and closable with respect to the document placing table 4 .

On the other hand, at the front of the upper part of the body 2, there is a second slidable member 10 for guiding the other end of the sliding portion of the document placement table 4.
is disposed near the second slidable member 10 and at a required position near the center in the direction of movement of the document table 4, near the end (indicated by a chain line 12) when the document table 4 reciprocates. ) The document placing table 4 is tilted even by its own weight, that is, the document placing table 4 is tilted.
A restraining member 18 is fixedly attached thereto to prevent one end 14 from hanging down and to prevent the other end 16 from lifting up.

Referring to FIGS. 2 and 3 showing details of the sliding mechanism 6 to the restraining member 18, first, a fixed guide rail 20 as a first slidable member is located at the rear of the upper part of the body 2. The slidable member 2
A sliding mechanism 6 is disposed so as to be slidable with reference to 0 as a guide. The sliding mechanism 6 includes a support 22 that supports the original table 4 made of transparent contact glass or the like, a parallel rail 24 that is integrally fixed to the support 22, and a parallel rail 24 that is connected to the parallel rail 24 and the above. The sliding device 6 is composed of a large number of balls 26 that are rotatably fitted between the fixed guide rails 20, and the sliding device 6 reciprocates along the fixed guide rails 20 by the driving force of a drive motor (not shown). It works like this.

On the other hand, a fixed guide rail 10 serving as a second slidable member for guiding the other end of the sliding portion of the document mounting table 4 disposed at the front of the upper part of the machine body 2 includes:
As described above, in a copying machine where the document table 4 is moved to one side in the required position, that is, as shown by the chain line in the first figure, when the document table 4 is moved to one side, at least the other end 16 is lifted up. In a type of copying machine that moves left and right approximately in a distributed manner with respect to the center of the machine body 2,
One or more holding members 18 are disposed at suitable positions to prevent at least the other end from lifting up when one side of the document table 4 moves in either the left or right direction on the paper surface of FIG. , the holding member 1
No. 8 has a restraining portion 18a formed at the upper part, and sloped surfaces 18b and 18c which widen toward each other at a predetermined angle θ are formed at both ends in the sliding direction, and the vicinity of the lower end is invaginated into the body 2. In this state, it is fixed to the body 2 via a set screw 30 or the like. Incidentally, the inclined surfaces 18b, 18 of the suppressing member 18 that widen toward the end
It is preferable that the lower ends of c (end points P, Q) are recessed from at least the upper surface 2a of the body 2 in order to avoid damage to the protruding original, and the upper surface of the holding part 18a is on the side of the original mounting table 4. It is said that it is preferable to be formed with an inclination 18d toward.

Therefore, even if the original set on the original placing table 4 is a large original that protrudes beyond the original placing table 4, the protruding part of the original will be guided to the inclined surface 18d or 18c of the holding member 18 during scanning of the original. Since the paper passes through the paper smoothly, damage to the original or misalignment of the original is reliably prevented. In addition, the holding member 1
According to experiments conducted by the present inventors, good results were obtained when the inclination angle θ of the inclined surfaces 18b and 18c in No. 8 was θ≧15°.

(Effects of the Invention) As detailed above, according to the present invention, in the document table sliding device of a copying machine in which the document placing table reciprocates on the upper surface of the machine, one side of the document placing table in the moving direction a first slidable member disposed above the machine body; a sliding mechanism that slidably supports the original document mounting table with respect to the first slidable member; and a moving direction of the original document mounting table. a second slidable member disposed on the top surface of the machine body on the other side and slidably supports the document placement table; and a second slidable member protruding from the top surface of the machine body near the second slidable member. In addition, a restraining member is provided near the center of the document placing table in the moving direction, and has a holding part for preventing the document placing table from lifting up when the document placing table protrudes beyond the body in the moving direction. In the document table sliding device of a copying machine having a holding member, the holding member has an inclined surface formed at both ends in the direction of movement of the document placing table and extending from the upper surface of the machine body to the holding portion. Therefore, when the document tray moves back and forth, the tilting of the document tray at one end or both ends is corrected by the restraining member, and smooth reciprocation is achieved. If the document placed on the document tray protrudes far beyond the document placement table, since the holding member has inclined surfaces at both ends, even if the protruding document comes into contact with the holding member when the document placement table is moved, it will not move along the slope. In particular, even if the original comes into contact with the holding member at a position close to the top of the machine, the document can be guided along the slope and over the upper end of the holding member. Problems such as damage or misalignment are reliably prevented.

[Brief explanation of drawings]

FIG. 1 is an overall perspective view showing an embodiment of the present invention;
FIG. 2 is a side view showing details of the document mounting table, and FIG. 3 is a partial view showing details of the holding member of the present invention. 2... Body, 4... Document placement table, 6... Sliding mechanism, 10... Second sliding member, 18... Holding member, 18b, 18c... Inclined surface, 20... First Sliding member.

Claims (1)

[Scope of Claim for Utility Model Registration] A document tray sliding device in a copying machine in which the document tray moves back and forth on the upper surface of the machine, which is a document tray sliding device that is disposed above the machine on one side in the direction of movement of the document tray. a sliding mechanism for slidably supporting the original document mounting table with respect to the first sliding member; a second slidable member that is provided and slidably supports the original document placement table; A copying machine having a restraining member disposed closer to the center and having a restraining portion for preventing the document loading table from lifting up when the document loading table protrudes beyond the machine body in the moving direction. In the copying machine, the document table sliding device is characterized in that the holding member is formed with an inclined surface extending from the top surface of the body to the holding portion at both ends in the direction of movement of the document placing table. Document table sliding device.