JPH0741012Y2 - Toner cartridge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention seals the inside of a hollow container by attaching a seal sheet to a toner replenishing port for supplying the toner contained in the hollow container to a toner hopper. The present invention relates to a toner cartridge capable of supplying a toner to a toner hopper by peeling off the seal sheet by rotating a take-up roll having the end of the seal sheet attached.

[Prior art]

As the toner cartridge as described above, for example, those described in Japanese Utility Model Publication No. 63-45565 and Japanese Utility Model Publication No. 61-117170 are known.

The toner cartridge 1'is shown in FIGS.
Its usage is shown. First, the operator uses the toner 2
When the toner is to be supplied to an image forming apparatus such as a copying machine or a laser beam printer, the toner cartridge 1 '
The toner hopper 16 installed in the main body of the image forming apparatus.
(Fig. 1) and insert it. Then, the take-up roll 7'where the tip of the seal sheet 6 is fixed is rotated,
The toner 2 enclosed in the toner cartridge 1'can be removed from the toner hopper 16 (FIG. 1) by simply peeling off the seal sheet 6 attached to the opening edge 9 of the toner supply port 5. And can be supplied to the developing unit of the main body of the image forming apparatus. Therefore, the toner cartridge 1'is excellent in that it is easy to handle and the toner 2 does not easily scatter from the main body of the image forming apparatus to the outside.

In the conventional toner cartridge 1 ', the angle formed by the contact point 20 between the take-up roll 7'and the seal sheet 6, the take-up opening end 15', and the opening edge 9 of the toner replenishing port 5, the so-called take-up. When the angle is small, that is, when the winding roll 7'is rotated counterclockwise (opposite arrow 21), a large load is applied to the seal sheet 6 at the winding opening end 15 '. Therefore, there is a problem that the seal sheet 6 is damaged.

In order to deal with this, in the toner cartridge 1 ′, the winding angle (θ ₂ ) is increased.
It is necessary to limit the rotation direction of the winding roll 7'to only one direction of the arrow 21.

Therefore, in the above-described conventional toner cartridge 1 ', in consideration of this point, the take-up roll 7'is set in a fixed direction (arrow 2).
A ratchet pawl 18 is provided on the main body of the toner cartridge 1'to prevent rotation other than 1), and a ratchet pawl wheel shaft 19 engaging with the ratchet pawl 18 is integrated with one end of the take-up roll 7 '. There is. Further, the handle 13 'is also provided with a ratchet engaging portion 17 to improve the reverse rotation preventing function of the winding roll 7'to prevent erroneous operation.

[Problems to be solved by the device]

In the conventional toner cartridge 1'configured as described above, the take-up roll 7'is rotated in the clockwise direction (arrow 21) in order to reduce the resistance of the seal sheet 6 to the take-up opening end 15 '. Only allowed to.

However, even with such a configuration, the winding angle θ ₂
However, it is impossible to expect a larger value, and further reduction of the load on the seal sheet 6 cannot be achieved.

Therefore, an object of the present invention is to provide a toner cartridge which can further reduce the load on the seal sheet with a simple structure.

[Means for Solving the Problems]

In order to achieve the above object, the main means adopted by the present invention is the gist of the present invention. A toner is contained inside a hollow container, and a seal sheet is attached to the opening edge of a toner supply port for supplying toner to a toner hopper. By sealing the inside of the hollow container by wearing, by rotating the take-up roll that is axially supported by the roll bearing provided on one side of the hollow container,
In the toner cartridge adapted to wind up the seal sheet, the take-up roll is arranged so that the contact point between the take-up roll and the seal sheet pulled out from the take-up roll is located on the pull line of the seal sheet. A toner cartridge provided in the hollow container.

[Action]

According to the present invention, since the take-up roll is provided in the hollow container so that the contact point between the take-up roll and the seal sheet pulled out from the take-up roll is located on the pull line of the seal sheet, The winding angle of the seal sheet attached to the opening edge of the supply port to the winding roll is 180 ° at maximum.
It is possible to set the load on the seal sheet without any contact with the hollow container, and the load on the seal sheet is almost only the adhesion force to the opening edge, and it is possible to further reduce the load on the seal sheet. Become.

Therefore, the seal sheet is less likely to be damaged, and the sticking force between the seal sheet and the opening edge of the hollow container can be enhanced. This also leads to an improvement in toner sealing performance.

〔Example〕

Subsequently, an embodiment of the present invention will be described with reference to FIG. 1 to provide an understanding of the present invention.

FIG. 1 shows a toner cartridge which is the background of the present invention. FIG. 1 (a) is a front sectional view of a main part of the same, and FIG. 1 (b) is an operation explanatory view at the time of winding a seal sheet. FIG. 1 is a front sectional view of a main part of a toner cartridge according to an embodiment of the present invention.

The following embodiments are merely specific examples, and do not limit the technical scope of the present invention.

First, the toner cartridge as the background of the present invention shown in FIG. 1 will be described. The toner cartridge 1 shown here is a seal sheet that seals a hollow container 4 that accommodates the toner 2 inside and a winding roll accommodating portion 3 formed on one side, and a toner supply port 5 of the hollow container 4. 6, a winding roll 7 for winding the seal sheet 6, and a winding roll 7
In order to rotatably support the roll container 8, the roll container 8 is formed on one side of the hollow container 4 and is projected from the roll bearing 8.

The toner replenishing port 5 is provided at the bottom of the hollow container 4 and
Is formed along the longitudinal direction of the seal sheet 6, and the seal sheet 6 has a strip shape, and the outer peripheral edge portion 6 _d of the sealing portion 6 _c from one end 6 _a to the intermediate portion 6 _b is the opening edge of the toner replenishing port 5. is adhered to 9, and then after being folded 180 ° at the intermediate portion 6 _b, which is formed in the toner containing sides of the winding roll accommodating portion 3 in the vicinity of the end 6 _a of the seal seat 6 through the winding opening 10, the tip 6 _e is bonded to the winding roll.

Further, the take-up roll 7 is axially partly or wholly arranged so that the sticking surface of the toner cartridge 1 of the seal sheet 6 can be rotated only in the direction in which it is wound inward (arrow 11). A ratchet claw portion 12 having a claw-shaped cross section is provided on the outer peripheral portion thereof and is integral with the handle 13. That is, the projecting ratchet claw portion 12 of the take-up roll 7 may be only a portion that comes into contact with the roll bearing 8, or may be formed over the entire axial support direction of the take-up roll 7.

The roll bearing 8 that supports the winding roll 7 is a flexible ring-shaped body, and a ratchet recess 14 that can be engaged with the ratchet claw portion 12 of the winding roll 7 is formed on the inner peripheral side thereof. In the take-up roll accommodating portion 3 formed on one side of the hollow container 4, the position of the axis of the hollow container 4 is defined by the opening edge 9 of the toner supply port 5 and the take-up opening end 15 on the other side of the hollow container 3. It is provided so as to project on a line, that is, on a so-called pull line of the seal sheet 6.

The toner cartridge 1 having the above structure is mounted in the toner hopper 16 from above. When the mounting is completed, the handle 13 integrated with the winding roll 7 is rotated counterclockwise (arrow 11). With this rotation, the seal sheet 6
Applied tensile force has been transmitted to the intermediate portion 6 _b of the sealing sheet 6, the sealing sheet 6 is stretched. Then, the seal sheet 6 is sequentially peeled from the intermediate portion 6 _b to the one end 6 _a , and the entire amount of the toner 2 is supplied to the toner hopper 16.

When the above-mentioned seal sheet 6 is wound, the take-up roll 7 is rotated counterclockwise so that the sticking surface of the seal sheet 6 on which the toner 2 is adhered (the inner surface of the hollow container 4) is wound inside. Rotate to (arrow 11). At this time, as shown in FIG. 1 (b), the flexible roll bearing 8 can be flexed in the outer peripheral direction at the portion where the ratchet claw portion 12 of the take-up roll 7 abuts. The winding roll 7 can be easily rotated.

However, when the rotation direction of the winding roll 7 is reversed (the direction opposite to the arrow 11), as shown in FIG. 1A, the ratchet claw portion 12 formed on the winding roll 7 and Since the ratchet recess 14 formed on the roll bearing 8 is engaged, the take-up roll 7 is locked and cannot rotate. At the same time, the handle 13 which is integral with the winding roll 7 cannot rotate, so that the operator can recognize the predetermined rotation direction of the handle 13.

Further, as described above, in the toner cartridge 1, since the axial center of the take-up roll 7 is located on the pulling line of the seal sheet 6, the take-up angle (θ ₁ ) Becomes larger. Therefore, the resistance of the take-up opening end 15 to the seal sheet 6 becomes small, and the take-up roll 7 can be rotated counterclockwise (arrow 11). As a result, the inner surface side of the hollow container 4 of the seal sheet 6 to which the toner 2 adheres can be wound up inside the take-up roll 7, and the contamination of the seal sheet 6 with the toner 2 is reduced.

Further, since the ratchet pawl 12 having a large locking force is formed on the winding roll 7 integrated with the handle 13, the winding roll 7 can be rotated only in a predetermined direction,
The operator does not accidentally turn the handle in the wrong direction. Further, the seal sheet 6 can be reliably wound up, and the structure thereof is simple, and the handle 13 does not require the ratchet engaging portion 17, nor the ratchet pawl 18 or the ratchet pawl axle 19. Production is easy and production costs can be reduced.

Then, as an embodiment of the present invention, the contact point 20 between the winding roll 7 and the seal sheet 6 pulled out from the winding roll 7 is set so that the position of the roll bearing 8 is pulled. A toner cartridge having a height so as to be positioned on the line will be described.

For example, as shown in FIG. 2, the contact 20 and the winding opening end are
The structure is such that 15 and the opening edge 9 of the toner supply port 5 on the other side of the hollow container 4 are located on a substantially straight line. In this embodiment, there is almost no resistance of the winding opening end 15 to the seal sheet 6, and the resistance related to the seal sheet 6 depends on the adhesive force between the seal sheet 6 and the opening edge 9 of the hollow container 4. Most of them. That is, since the adhesive force can be increased by the amount of the decrease in the resistance due to the winding opening end 15, the sealing property of the toner 2 is improved.

Further, in the present embodiment as well, it is needless to say that the toner cartridge according to the above background is obtained and the effects other than those described above are equivalently obtained.

As described above, in the above-described embodiments and the like, the ratchet claw portion 12 formed on the take-up roll 7 and the ratchet recess 14 formed on the roll bearing 8 are both one, but two each. They may be formed as described above or the number of them may be different.

[Effect of device]

According to the present invention, as described above, the toner is housed in the hollow container, and a seal sheet is attached to the opening edge of the toner supply port for supplying the toner to the toner hopper to seal the inside of the hollow container. In a toner cartridge in which the seal sheet is wound by rotating a take-up roll axially supported by a roll bearing provided on one side of the take-up roll, the take-up roll and the take-up roll are wound. The toner cartridge is provided in the hollow container such that a contact point with the seal sheet pulled out from the take-up roll is located on a pull line of the seal sheet.
That is, depending on the above configuration, the winding roll is provided in the hollow container so that the contact point between the winding roll and the seal sheet pulled out from the winding roll is located on the pull line of the seal sheet, It is possible to set the winding angle of the seal sheet attached to the opening edge of the toner replenishing port to the take-up roll at a maximum of 180 °, and the load on the seal sheet is almost without contacting the hollow container part. It is possible to further reduce the load on the seal sheet only by the adhesion force to the opening edge.

Therefore, the seal sheet is less likely to be damaged, and the sticking force between the seal sheet and the opening edge of the hollow container can be enhanced. This also leads to an improvement in toner sealing performance.

[Brief description of drawings]

FIG. 1 shows a toner cartridge which is the background of the present invention. FIG. 1 (a) is a front sectional view of the main part, and FIG. 1 (b).
FIG. 2 is an explanatory view of the operation when the seal sheet is wound, FIG. 2 is a front sectional view of a main part of a toner cartridge according to an embodiment of the present invention,
FIG. 3 is a perspective view of a conventional toner cartridge, and FIG. 4 is an explanatory view of a state in which a seal sheet is wound in the conventional toner cartridge. [Description of Reference Signs] 1 ... Toner cartridge 2 ... Toner, 4 ... Hollow container 5 ... Toner supply port, 6 ... Seal sheet 7 ... Winding roll, 8 ... Roll bearing 9 ... Opening edge, 13 ... Handle.

Claims (1)

[Scope of utility model registration request] 1. A toner container is housed inside a hollow container, and a seal sheet is attached to the opening edge of a toner supply port for supplying toner to a toner hopper to seal the inside of the hollow container. In a toner cartridge in which the seal sheet is wound by rotating a take-up roll that is rotatably supported by a roll bearing provided in, the take-up roll is pulled out from the take-up roll and the take-up roll. A toner cartridge, wherein the hollow container is provided so that a contact point with the formed seal sheet is located on a pull line of the seal sheet.