JPS6315233Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an improvement in a cassette holding device for a cassette body for automatically feeding cut sheets used, for example, in various copying machines, simple printing machines, and the like.

Generally, for this type of cassette holding device,
Various types of retention are used. An example of a cassette holding device that has been widely used in the past is shown in FIGS. 1 and 2. To explain the structure of this cassette holding device, a in the figure is a cassette holding stand provided, for example, in the cassette feeding section b of the copying machine main body i, and a guide pin c is provided on the inner side of this cassette holding stand a. It is provided. On the other hand, in the figure, d is a paper feed cassette which is a cassette body in which cut sheets, e.g., cassette paper e, etc. are stacked and stored, and a positioning protrusion g provided with a positioning groove f at the front end of the paper feed cassette d. is installed protrudingly. Note that j is a paper feed roller.

Therefore, when setting the paper feed cassette d using such a cassette holding device, insert the paper feed cassette d into the cassette feeding section b and align the groove f of the positioning protrusion g with the guide pin c. engage,
Next, by placing the legs h of the paper feed cassette d on the cassette holding base a, the paper feed cassette d
is held and fixed on the cassette holder a and set in the cassette feeding section b.

However, with this type of fixation of the paper feed cassette d at the insertion end side, the engagement ability of the paper feed cassette d against external force is weak, and poor engagement tends to occur when the paper feed cassette d is inserted and set, for example, resulting in paper feeding mistakes. This can easily cause accidents such as transfer failure due to tip misalignment. Moreover, the paper cassette d
Even after setting the paper feed cassette d, even if a small external force is applied to the paper feed cassette d, for example, if a person passing by the copying machine accidentally touches or bumps into the paper feed cassette d, the groove f will still be connected to the guide pin c. The engagement of the cassette feeding section b is likely to be easily disengaged, resulting in problems such as poor paper feeding in the cassette feeding section b and poor transfer due to skew.

This invention was devised in view of the above-mentioned circumstances, and its purpose is to ensure that the cassette is set in the cassette feeding section in a stable state, to strengthen the set cassette, and to prevent the cassette from being exposed to external forces. To provide a cassette holding device capable of reliably and trouble-free feeding of cut sheets in a stable condition at all times without being affected by the cassette holding device.

An example of this invention is shown below in Figures 3 and 4.
This will be explained with reference to the figures. In the figure, reference numeral 1 denotes a main body of a copying machine, for example, and a paper feed roller 2 is provided in the main body 1, and a cassette paper feeding section 3, which is a cassette feeding section, is formed in a lower space. A guide pin 4 is provided on the inner side of the cassette paper feed section 3 along the width direction of the main body 1. Further, on the outside of the cassette paper feed section 3, a cassette holding stand 5 is provided to hold the main body 1.
The projecting end side is exposed from the side of the main body 1. A paper feed cassette 6, which is a cassette body, is held and fixed on the cassette holding table 5 and set in the cassette paper feed section 3. The paper feed cassette 6 has a bottom plate 7 at the inner bottom and a pair of legs 9 at the front bottom. Further, springs 8, 8 are provided between the bottom plate 7, which is the inner bottom of the paper feed cassette 6, and the bottom surface facing the legs 9, 9, respectively.
is interposed, and always urges the front side of the cut sheets 9, which are stacked and stored in the paper feed cassette 6, from the bottom side. That is, when the paper feed cassette 6 is set in the cassette paper feed section 3, the front surface of the paper P and the paper feed roller 2 are always in contact with each other, and as the paper feed roller 2 rotates, the paper is removed from the surface layer. The structure is such that the paper P can be fed into the main body 1 one by one. Note that 10 and 10 are separation claws, and when paper is fed from the paper feed cassette 6, the paper P
The function is to reliably feed the sheets one by one.

The cassette holding device 11 for holding and fixing the paper feed cassette 6 on the cassette holding stand 5 and the cassette paper feed section 3 has the following construction.

That is, a protrusion 13 having a groove 12 is provided at the front end of the paper feed cassette 6 in a protruding manner. Further, on the bottom surface of the rear side of the paper feed cassette 6, an engaging portion 14 is provided projecting approximately at the center. This engaging portion 14
is composed of protrusion plates 15, 15, which are a pair of protrusions whose protruding ends are in the shape of an arc, and are arranged side by side and spaced apart from each other so as to be flush with each other along the width direction.
On the other hand, on the rear side surface of the cassette holding base 5, an engagement receiving portion 16 is provided at the center. This engagement receiving portion 16 includes a first receiving member 17 formed into a cylindrical shape, for example, which is provided protrudingly on the cassette holding base 5, and a pair of convex portions on both rear sides of the first receiving member 17. A second receiving member 1 formed into a certain convex shape
8 and 18 are arranged protrudingly in parallel. Note that the inner surfaces of the second receiving members 18, 18 are sloped surfaces along the vertical direction. Then, the cassette holding base 5 of the paper feed cassette 6 and the cassette paper feed section 3
At the time of setting, the groove 12 of the protrusion 13 and the guide pin 4, the spaced apart part of the protrusion plates 15, 15 and the first receiving member 17, the rear side end surfaces of the protrusion plates 15, 15 and the second receiving member 18. , 18 are engaged with each other to form a cassette holding device 11 capable of holding and fixing the paper cassette 6 firmly without wobbling in the width direction and longitudinal direction of the paper cassette 6. Note that the engagement between the spaced apart portion of the protruding plates 15, 15 and the first receiving member 17 and the rear end surfaces of the protruding plates 15, 15 and the second receiving members 18, 18 is due to the engagement between the groove portion 12 and the guide pin 4. It goes without saying that the positions are set so that each can be engaged with the mating position as a reference, and each is set in an engagement form that does not cause rattling.

When setting the paper cassette 6 in the cassette paper feed section 3, first insert the front side of the paper cassette 6 containing stacked sheets of paper P into the cassette paper feed section 3, and then insert the paper cassette 6 into the cassette paper feed section 3 as shown in FIG. Groove 12 of protrusion 13
is positioned and engaged with the guide pin 4. Next, in this state, the rear side of the paper feed cassette 6 is rotated downward using the engagement portion between the groove portion 12 and the guide pin 4 as a fulcrum, thereby attaching the first receiver to the spaced apart portion of the projection plates 15, 15. The member 17 intervenes to bring them into engagement, and similarly, when the paper feed cassette 6 is placed on the cassette holding base 5, the end surfaces of the projecting plates 15, 15 and the second receiving members 18, 18 come into engagement. As shown in FIG. 4, the paper feeding cassette 6 is firmly held and fixed to the predetermined cassette holding base 5 and the cassette paper feeding section 3, and the paper feeding system is completed.

According to this holding form of the paper feed cassette 6, the width direction side of the paper feed cassette 6 is restricted by the engagement between the projection plates 15, 15 and the first receiving member 17, and the longitudinal side is also The side has a protrusion plate 15,1
5 and the second receiving members 18, 18, the paper feed cassette 6 can be set in a stable state in a securely set position.

Therefore, even if an external force is applied to the paper feed cassette 6, the engagement of each engaging portion will always maintain a stable holding state without moving, for example, along the width and length sides from the set position. Therefore, it is possible to reliably feed the paper P smoothly without any troubles such as poor paper feeding or poor transfer.

Furthermore, when setting the paper feed cassette 6, it is rotated using the engaging part between the groove part 12 and the guide pin 4 as a fulcrum, and then each engaging part is engaged to complete the setting. The status can be confirmed reliably, mistakes in insertion of the paper feed cassette 6 are prevented, and the paper feed cassette 6 is always set at a predetermined setting position.

Note that this invention is not limited to the embodiments described above. For example, in the above embodiment, the first receiving member has a protruding shape, but as shown in FIG. These engagement holes 20, 20 are provided with protruding plates 15, 15.
The same effects as in the above-mentioned embodiment can be obtained even if the engagement form is constructed by interposing the lower end of the . However, in FIG. 6, the same components as those in the embodiment described above are given the same numbers and the explanation thereof will be omitted.

As explained above, according to this invention, an engaging portion is provided protruding from the bottom surface of the cassette body, an engaging receiving portion is provided on the cassette holding base, the insertion end side of the cassette body is positioned, and then the engaging portion and the engaging portion are provided. Since the cassette body is held and fixed on the cassette holding table by engaging with the engagement receiving portion, the cassette body can be reliably set in a predetermined position without any insertion errors, for example. Furthermore, the set cassette body is restricted from moving in the width direction and the insertion direction due to the engagement between the engaging part and the engaging receiving part.For example, if an external force is applied to the cassette body, Even if the cut sheet is moved, it will not move along the width or insertion direction from the set position, and will always maintain a stable holding state, ensuring that the cut sheet will not suffer from problems such as poor paper feeding, misalignment of the leading edge, or poor transfer due to skew. can be fed smoothly.

Then, the cassette body is rotated using the positioning member provided on the insertion end side of the cassette body as a fulcrum,
The engagement part on the bottom surface of the cassette body and the engagement receiving part on the cassette holding base can be easily and reliably engaged. Moreover, since the cassette body is set by the engagement between the engagement part and the engagement receiving part,
It is possible to reliably confirm the setting completion state, and it is possible to always maintain a stable setting state at a predetermined position.

[Brief explanation of drawings]

1 and 2 are a perspective view and a side sectional view showing a conventional holding device, FIG. 3 is a perspective view showing an embodiment of this invention, FIG. 4 is a sectional view taken along the - line, and FIG. This figure is a state diagram showing the transition of the set state of the cassette body, and FIG. 6 is a perspective view showing another embodiment of this invention. 3...Cassette paper feeding section (cassette feeding section), 5
...Cassette holding base, 6...Paper feed cassette (cassette body), 14...Engagement portion, 16...Engagement receiving portion,
P...Paper (cut sheet).

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A cassette feeding section equipped with a cassette holding stand is provided, a cassette body containing cut sheets is inserted into this cassette feeding section, and a cassette body provided at the insertion end side of the cassette body is provided. The cassette body is held on a cassette holding base by positioning with a positioning member, wherein an engaging portion is provided on the bottom surface of the cassette body, and an engagement receiving portion for receiving the engaging portion on the cassette holding base. The cassette body is held and fixed on the cassette holding table by rotating the cassette body downward about the positioning member to engage the engagement portion and the engagement receiving portion. A cassette holding device characterized by: (2) The form of engagement between the engaging part and the engaging receiving part is such that the engaging part is composed of a pair of spaced apart opposing protrusions, and the engaging receiving part is composed of a receiving member that receives the protruding bodies. , Claim 1 of the utility model registration is characterized in that the protrusion and the receiving member are engaged with each other.
The cassette holding device described in section. (3) The receiving member is composed of a receiving protrusion interposed in the spaced apart part of the protruding body, and the movement of the cassette body in the width direction is restricted by engagement between the receiving protrusion and the separated part of the protruding body. A cassette holding device according to claim 2 of the utility model registration claim. (4) The receiving member is composed of a convex body that engages with the end face of each protrusion, and by engaging the convex body with the end face of the protrusion, the movement of the cassette body in the insertion direction is restricted. A cassette holding device according to claim 2 of the utility model registration claim.