JPH0326859Y2 - - Google Patents

Description

[Detailed description of the invention] <Technical field> The present invention is a device in which the main body of the device is separated into upper and lower parts, and the upper main body and the lower main body are rotatably supported. Regarding equipment.

<Prior art> In an electrophotographic copying machine, each process of charging, exposure, phenomenon, transfer, neutralization, and cleaning is arranged opposite to the photoreceptor of the recording medium, and the paper is conveyed to the above-mentioned transfer position. At the same time, a paper transport path is provided for discharging the paper onto which the image has been transferred via the fixing means. This paper is conveyed along the conveyance path by the conveyance means in accordance with the copying operation, but jams often occur along the conveyance path. Therefore, in the past, the main body of the copying machine was separated into upper and lower parts along the conveyance path, and the upper body and the lower body were rotatably supported, and the upper body was opened to expose the paper conveyance path. is facilitated.

A conventional example of the device for opening and closing the upper and lower bodies is shown in FIG. As shown in the figure, an upper body frame 1 of, for example, a copying machine is movably supported on a lower body frame 2 by a shaft portion 3. As shown in FIG. A shaft 5 is attached to the upper body frame 1 and a shaft 6 is attached to the lower body frame 2 for opening the upper body and attaching a balancer 4 to maintain this state. The balancer 4 has, for example, a spring inside, and uses the biasing force of the spring to push the upper body frame 1 upward and open it. Mounting brackets 7 and 8 are fixed to both ends of the balancer 4. The openings of the mounting brackets 7 and 8 are inserted into the shafts 5 and 6, and the E-rings 9 are used to prevent the balancer 4 from falling off. It is installed between 6 and 6.

The upper and lower body frames 1 and 2 are provided with a closing lock mechanism to maintain the closed state. When this closing lock mechanism is released, the biasing force stored in the balancer 4 causes the upper body frame 1 to rotate upward about the shaft portion 3. As a result, the main body of the copying machine is opened vertically across the conveyance path. As shown in FIG. 5, the balancer 4, which constitutes an opening/closing device for opening the copying machine main body vertically, is attached using E-rings 9 at two locations on the shafts 5 and 6 of the upper and lower main body frames 1 and 2. Needs stopping work. This balancer 4 usually has two
The balancer 4 was currently in use, and the E-ring 9 required a total of four stops to install the balancer 4, making the workability very poor. Furthermore, since the mounting fittings 7 and 8 of the balancer 4 were inserted into the shafts 5 and 6 and then secured with E-rings, the work was more troublesome.

Furthermore, when an opening lock mechanism is provided to lock the upper and lower main body frames 1 and 2 when they are opened, the E-ring fixing and installation work described above becomes troublesome in order to install this lock mechanism.

<Purpose> The present invention provides a vertical opening/closing device in which it is easy to install a balancer for separating the top and bottom of the device body and opening the device body.

<Embodiment> A copying machine or the like is considered to be a typical example of a device in which a device main body is separated into upper and lower parts and can be opened and closed. However, not only copying machines but also printers using electrophotography, such as laser beam printers, have upper and lower parts separated. Therefore, the present invention will be explained below using a copying machine as an example.

FIG. 1 is a perspective view showing an opening/closing device for separating the top and bottom of a copying machine according to the present invention. In the figure, 10 is the copying machine main body, 11 is the upper body frame of the copying machine main body,
12 is a lower body frame of the copying machine body. The upper body frame 11 is rotatably supported by the lower body frame 12 at a shaft portion 13 . The upper body frame 11 includes a photoreceptor as a recording medium, a charger for uniformly charging the photoreceptor, an optical system for scanning an original image and focusing it on the photoreceptor, and an electrostatic latent formed on the photoreceptor. A developing device for visualizing an image, a static eliminator and a cleaning device for removing residual charges and toner from the photoreceptor, and a part of a conveying system for conveying paper, such as an upper guide plate, are attached. The lower body frame 12 is also provided with other conveyance systems for conveying the paper, such as a lower guide plate, conveyance rollers, conveyance belt, etc., a transfer device facing the photoreceptor in the conveyance path, a fixing device, etc. It is being Therefore,
When the upper body frame 11 is rotated upward about the shaft portion 13, the copying machine body 10 is opened vertically with the conveyance path as a boundary.

A balancer 14 is installed between the upper and lower body frames to open the upper body frame 11. As explained in the conventional example, this balancer 14 has a spring etc. installed therein, and when compressed, a biasing force is stored, and this stored biasing force pushes up the upper main body frame 11 upward. . The balancer 14 is not a spring,
Some are hydraulic or other. Attachment shafts 15 and 16 are fixed to the upper body frame 11 and the lower body frame 12 in order to attach the balancer 14. The mounting shaft 15 has a mounting groove 1.
7 is formed. Further, the mounting shaft 16 is formed with stepped grooves 18a and 18b for mounting.

Balancer 1 for the above mounting shafts 15 and 16
Mounting metal fittings 19 and 20 are attached to both ends of 4. The mounting bracket 19 has a U-shaped cut groove 21 formed in a shape that matches the diameter of the groove 17 of the mounting shaft 15. The mounting bracket 20 has a U-shaped cut groove 22 that matches the diameter of the groove 18a of the mounting shaft 16.
is formed. U-shaped kerfs 21 and 22
The kerf 21 is formed deeper than the kerf 22,
Workability when installing the balancer 14 is improved.

On the other hand, a locking mechanism, ie, an opening lock plate 23, is provided to maintain the state when the upper and lower body frames 11 and 12 are opened. The lower end of the lock plate 23 is provided with an opening 24 that is inserted into a stepped groove 18b of a mounting shaft 16 attached to the lower body frame 12. The opening 24 is the mounting shaft 1
The lock plate 23 is formed to be slightly larger than the diameter of the groove 18b of No. 6, and thereby the lock plate 23 is provided rotatably around the mounting shaft 16.

The lock plate 23 further includes an upper body frame 11.
An L-shaped guide hole 25 is formed for locking the opening. Further, a notch 26 communicating with the guide hole 25 is formed at the tip of the lock plate 23. The guide hole 25 of the lock plate 23 is fitted into a mounting shaft 27 fixed to the upper body frame 11. The mounting shaft 27 has groove 2 like other mounting shafts.
A lock plate 23 is formed in this groove 28.
The guide hole 25 is inserted. Therefore, lock plate 2
3, the hole 24 is inserted into the groove 18b of the mounting shaft 16, the notch 26 of the guide hole 25 is made to correspond to the mounting shaft 27, and the guide hole 25 is inserted into the groove 28. Therefore, the guide hole 25 is formed to be slightly larger in diameter than the groove 28.

In the locking plate 23, when the upper and lower body frames 11, 12 are closed and locked, the mounting shaft 27 of the locking plate 23 is in the position indicated by a in the guide hole 25, as shown in FIG. Then, when the upper body frame 11 is opened, the mounting shaft 27 is guided by the guide hole 25 and moves upward,
When position d is reached, the lock plate 23 rotates clockwise around the mounting shaft 16 due to its own weight, and the guide hole 2
Move to position e, which is the lock part 5. In this state, the open state of the upper body frame 11 is locked. To release the locked state, the lock plate 23 may be rotated counterclockwise around the mounting shaft 16. In this case, the notch 26 communicating with the guide hole 25
The lock plate 23 may come off from the mounting shaft 27 via the lock plate 23. Therefore, as shown in the figure, a resin locking plate 29 is provided to cover the notch 26. The locking plate 29 has a handle portion 30 integrally formed therein, and the handle portion 30 is fixed to the lock plate 23, with the free end facing the notch 26. Therefore, as shown in FIG. 3, the guide hole 25 of the locking plate 23 can be fitted into the mounting shaft 27 by utilizing the deflection of the free end side of the locking plate 29. This prevents the lock plate 23 from coming off the mounting shaft 27 when the lock is released.

The lock plate 23 is attached as described above, and after the lock plate 23 is attached, the balancer 14 for opening the upper body frame 11 is attached. At least the opening 2 in the locking plate 23
4 into the groove 18b of the mounting shaft 16. First, insert the U-shaped groove 21 on the mounting bracket 19 side of the balancer 14 into the mounting shaft 1 of the upper body frame 11.
5 into the groove 17. And balancer 14
is compressed and the cut groove 22 on the mounting bracket 20 side is inserted into the groove 18a of the mounting shaft 16 of the lower main body frame 12, and the installation of the balancer 14 is completed. In this way, installation is carried out in two places: front and rear.
However, the lock plate 23 is only provided on one side. The lock plate 23 may be attached to the attachment shaft 27 after the balancer 14 is attached, or it may be attached in advance.

In the opening/closing device in which the balancer 14 and the lock plate 23 are attached as described above, the upper and lower body frames 1
When the locks 1 and 12 in the closed state are released, the compressed urging force of the balancer 14 causes the upper body frame 11 to rotate upward about the shaft portion 13. At this time, the mounting shaft 27 is guided by the guide hole 25 of the lock plate 23 and moves upward as shown in FIG. Get stuck in. As a result, the open state of the upper body frame 11 is locked. This locked state is shown in the sectional view of FIG.

To release the lock in the open state, rotate the lock plate 23 counterclockwise around the mounting shaft 16 using the handle 30, and then move the mounting shaft 27 through the guide hole 25.
Move from position to position d. If the upper body frame 11 is pushed down in this state, the upper and lower body frames 11 and 12 are closed and locked.

Here, the mounting brackets 19 and 20 of the balancer 14 are
By providing the U-shaped grooves 21 and 22 in the mounting shafts 15 and 16, mounting to the mounting shafts 15 and 16 becomes extremely simple since no E-ring stopper or the like is required. In addition, by providing the lock plate 23, the upper main frame 11 is restricted from opening any further, so the cut grooves 21, 22
is detached from the mounting shafts 15 and 16, and the balancer 14
will never come off. Cut groove 2 of the above mounting bracket 19
1 is formed deeper than the cut grooves 22 of other mounting fittings 20, thereby preventing the attached balancer 14 from coming off when another balancer 14 is attached. In other words, when the balancer is attached, it will fall downward due to its own weight, and even if the upper body frame 11 is opened further when the other balancer is attached, the mounting bracket 20 will not be attached to the mounting shaft 16.
Because of this position, even if the kerf 22 is shallow, it will not come off. In this case, the cut groove 2 of the mounting bracket 20
2 is made shallow, the upper body frame 11 does not need to be opened more than necessary when the balancer 14 is assembled, and the assembly becomes easier.

The lock plate 23 is attached to the attachment shaft 16 of the lower body frame 12 along with one side of the balancer 14, and the other end is attached to an attachment shaft 27 different from the attachment shaft 15 of the upper body frame 11. This shows the lock plate 2 with the balancer 14 installed.
3 to open the upper body frame 11 more than when it is unlocked. In other words, even if the balancer 14 is attached to the lock plate 23,
It can be easily removed from the mounting shaft 27. However, if it is not necessary to remove the lock plate 23, the balancer 14 may be attached to the attachment shaft 15.

<Effects> According to the vertical opening/closing device of the present invention, the balancer can be installed by simply inserting the U-shaped grooves of the mounting members provided at both ends of the balancer into the mounting portions respectively mounted on the upper and lower bodies. and its installation is very easy. Further, since a locking means is provided to prevent the upper body from opening more than necessary, it is possible to prevent the balancer from coming off.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of the vertical opening/closing device of the copying machine main body according to the present invention, Fig. 2 is a perspective view showing a specific example of the lock plate according to the present invention and a perspective view for explaining the operation, and Fig. 3 is a perspective view of the lock plate according to the present invention. FIG. 4 is a sectional view showing the state in which the upper and lower bodies are opened and locked, and FIG. 5 is a perspective view showing an example of a conventional vertical opening/closing device. 11... Upper body frame, 12... Lower body frame, 13... Shaft portion, 14... Balancer,
15, 16... Mounting shaft, 19, 20... Mounting bracket, 21, 22... U-shaped cut groove, 23... Lock plate, 25... Guide hole, 27... Mounting shaft.

Claims (1)

[Scope of utility model registration request] In the opening/closing device, the device main body is separated into upper and lower main bodies, the upper main body is pivotally supported by the lower main body, and the upper main body is provided so as to be freely openable and closable with respect to the lower main body, and the above-mentioned balancer rotates the upper main body in an upward direction; A mounting shaft provided on the upper and lower bodies for mounting the balancer, a mounting member formed with a U-shaped cut groove to be inserted into the mounting shaft and fixed to both ends of the balancer, and an unnecessary A vertical opening/closing device characterized by comprising a locking means for regulating opening and maintaining an open state.