JPH0492069A - Coupling device of case body - Google Patents

Abstract

PURPOSE:To facilitate separating/coupling work by coupling two case bodies with a barrel-hole and a hinge pin so that they are capable of turning each other, connecting a pulling-out groove having a width smaller than a diameter of the barrel-hole thereto, and forming a shorter size section smaller than the width of the pulling-out groove to the hinge-pin. CONSTITUTION:A head section 12a having a diameter larger than a diameter of a barrel-hole is formed on the front end of a hinge pin 12 mounted to upper hinge plates 4 and 6, and its sectional shape is formed in the shape of an oval provided with an arc section 12b having a diameter corresponding to the diameter of the barrel-hole 11 and a shorter size section 12c shorter than the diameter of the barrel-hole. The barrel-hole 11 is connected to the outside of a lower hinge plate 3 with a pulling-out groove 13 having a width slightly wider than a width size of the shorter size section 12c of the hinge pin 12. An upper case body 2 is positioned in full admission to bring a stopper 21a in contact with the hinge pin 12, and when an E-ring 25 is out of a coupling barrel 23, the case body 2 can be turned up to a separation angle wider than a maximum opening. At that time, the arc section 12b of the hinge pin 12 has the same position as that of the pullingout groove 13, so that the upper case body 2 can be easily separated when it is lifted up.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applied to two
The present invention relates to a case body connection structure in which two case bodies are connected to each other so as to be openable and closable.

Conventional technology In image forming devices such as thermal printers, laser beam printers, and facsimile machines, the main body of the device may be formed by two blocks, an upper and a lower block, each built into the inside of a case, and paper jams may occur. in case of,
” - opens the block so that jammed paper can be easily removed. Further, depending on the image forming apparatus, the upper block may be opened when the paper feed cassette is attached or detached.

Conventionally, in order to connect these two case bodies so that they can be opened and closed, a hinge pin is attached to one case body, and a shaft hole into which the hinge pin fits is provided in the other case body, and the hinge pin is connected by caulking or screwing. It is fastened to the hinge part by.

For this reason, in the assembly process when manufacturing an image forming device, it is necessary to consider the procedure for connecting the case bodies together, and to assemble various parts into each case body. , the degree of freedom in the assembly process was limited3, and while the image forming device was in use, parts within the device could be easily replaced or repaired. Since the blocks cannot be easily separated, there is a problem in that it is difficult for an operator to perform the work.

The present invention provides for easily connecting and separating the hinge portions which support the case bodies of 2-') so as to be rotatable with respect to each other.
It is an object of the present invention to enable easy assembly and disassembly of a case body.

[Means for Solving the Problems]-2 The present invention provides a case body connecting device for connecting a first case body and a second gauge body to a phase '7j in a manner that allows the first case body and the second gauge body to open and close. forming a shaft hole L/ in a first hinge portion provided on the case body; attaching a hinge pin that rotatably fits into the shaft hole to a second hinge portion provided on the second case body; A link mechanism that regulates the maximum opening degree is biased between the first case body and the second lease body, and the cross-sectional shape of the hinge pin is formed between a circular arc portion corresponding to the diameter of the shaft hole and the shaft hole. 2, and remove the link mechanism.

When the wreath bodies are rotated to a separation angle that exceeds the maximum opening degree under the condition that This is a case body connection device formed into one hinge member and five parts.

The working first case body is rotatably connected to the second 7-case body by fitting into a 7°C shaft hole and a hinge pin. The first case body and the second gauge body mutually rotate L7 from the fully closed position to the fully open position, and the rotation from the fully open position is regulated by the link mechanism. When the link mechanism is removed, the case bodies can be rotated to a separation angle greater than the fully open position. In this separation angle state, the arcuate surface of the hinge pin is pulled out (at the position of 7 grooves, so the hinge pin can be easily removed from the shaft hole by passing through this groove and separating the gauge body). .

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail on the basis of illustrated embodiments.

FIG. 1 is a view showing the rear end portion of the L-side second case body 2 rotatably connected to the lower first case body constituting the main body of the image forming apparatus. If this image forming device is a laser beam printer, a photosensitive drum, a laser beam generator, etc. will be incorporated in the second case body 2, and will constitute an upper block body. A paper feed cassette, a recording paper transport device, and the like are incorporated into the first case body 1, forming a lower block.

Such a structure is usually referred to as a clamshell opening/closing structure.

A first hinge member, that is, a lower hinge plate 3 is fastened to the inside of the first case body adjacent to the inner surface of the case body.

On the other hand, on the inside of the second case body 2, a hinge plate 4 is fastened to a second hinge member, i.e., adjacent to the inner surface of the case body. 1st. The other inner surface of the case body 1 has a third
As shown in the figure, another lower hinge plate 5 is fastened at a position opposite to the lower hinge plate 3, and similarly, another lower hinge plate 5 is fastened to the inside of the second case body 2. Hinge plate 6
has been concluded.

Each lower hinge plate 3.5 is formed with a circular shaft hole 11, and each upper hinge plate 4.6 is formed with a circular shaft hole 11.
A hinge pin 12 is attached to which the hinge pin 12 is rotatably fitted. It guides the rotation of the second case body 2 relative to the first case body from the fully closed position shown in FIG. 1 to the fully open position shown in FIG. In order to prevent the case 2 from rotating, a link mechanism 9 is installed between the lower hinge plate 3 and the second hinge plate 4.

A head 12a with a diameter larger than the diameter of the shaft hole 11 is formed at the tip of each hinge plate 4.6, and its cross-sectional shape is similar to that of the shaft hole. 1
It is formed into an elliptical shape having a circular arc portion 12b having a diameter corresponding to the diameter of the shaft hole 1, and a short portion 12e shorter than the diameter of the shaft hole.

1 is the grain size part 1-2C of the hinge pin 12
It is connected to the outside of the lower hinge plate 3 by a cutout, groove] 3 having a width slightly wider than the width dimension of the lower hinge plate 3.

When the second case body 2 is in the fully open state, the hinge pin 120 arc portion] 2C is inserted into the pullout 1 as shown in FIG.
．． With respect to the groove 13, the phase is approximately 900. When the second case body 2 is rotated, for example, by 80 degrees from this position, the second case body 2 is brought to the fully open position, as shown in FIG. Beyond this maximum opening degree, the link mechanism 9 restricts the rotation of the second gauge body 2. As shown in FIG. 7, when the link mechanism 9 is removed from the upper hinge plate 4, it becomes possible to rotate the second case body 2 beyond the above-mentioned opening degree, The second case body 2 is attached to the first case body 2 so that the
For example, when moving 90 degrees with respect to the gauge body 1, the single-force arc portion 12C of the vinyl/zipin 1.2 becomes an extraction groove],
When the second gauge body 2 is held in position 3, the hinge pin 12 is guided into the extraction groove 13 and removed from the first hinge plate 3.
This case body 2 can be easily separated from the first case body 1. the second case body 2 to the first) y-
When connecting to the main body 1, it can be easily done by following the same procedure as described in L above.

Next 1. The link mechanism 9 mentioned above will be explained below.

FIG. 2 is an exploded view showing the members constituting the link mechanism 9 in the positional relationship shown in FIG. 1.

A guide cam groove 20 inclined in the -0 direction toward the hinge pin 12 is formed in the lower hinge plate 3, and the hinge lever engages with the guide cam groove 20.

This sliding shaft 22 has a large-diameter head 22a 1, and when the sliding shaft 22 is engaged with the guide cam groove 2, the head 22a is inserted into the head 22a in order to pass through the head 22a. A groove 20 with a slightly larger diameter than the guide force 1 is formed in the groove 20. A connecting shaft 23 is caulked to the other end of this hinge lever 21, and this connecting shaft 23 is fitted into a fitting hole 24 formed in the hinge plate 4. After fitting, attach the E to the connecting shaft 23.
By fitting the ring 25 once, the connection of the fitting shaft 23 to the hinge plate 4 is completed. This fitting shaft 23
can be freely attached to and detached from the seven-hinge plate 4 by attaching and detaching the IE ring 25. However, the link mechanism 9 and the hinge plate may be attached and detached by I-J at the sliding shaft 22 (the guide shaft 28 is caulked t=1 on the inner surface of the lower hinge plate 3). The guide shaft 28 is adapted to engage with a rocking force 12 groove 29 formed at one end of the click plate 30.A guide shaft 28 is provided at the other end of the click plate 30 toward the lower hinge plate 3. A guide shaft 31 is caulked, and this guide shaft 3
1 is adapted to engage with a sliding cam groove 32 formed in the lower hinge plate 3 and extending in the horizontal direction. At the tips of these two guide shafts 28.31, heads 28a, 31a having a diameter larger than the width of the cam groove 29.32 are provided.

The swing cam groove 29 has a horizontal guide portion 29a and a swing guide portion 2gb formed by bending from the negative end of the horizontal guide portion 29a.
Furthermore, a relief 7 portion 29c having a slightly larger diameter than the head portion 28a provided on the guide shaft 28 is formed at the other end of the guide portion 29a. stop.

Similarly, a relief portion 32a having a slightly larger diameter than the head portion 31a of the guide shaft 3 is formed at the end of the sliding cam groove 32. Head 31a
, the head 28a of the guide shaft 28 is located in the relief 7 portion 29e of the swing cam groove 29, and the click plate 30 can be attached to the lower hinge plate 3 in this state.

A click cam groove 33 is formed in the click plate 30 between the swing cam groove 29 and the guide shaft 31 and is inclined upward toward the hinge pin 12 .

A sliding shaft 22 crimped onto the hinge lever 21 is engaged with the click cam groove 33 . Furthermore, an engaging recess 33a is provided in the center of the click cam groove 33.
is formed, and an inclined surface 33b extends from the four parts 33a to the end of the click cam groove 33, and the inclined groove 33b portion of the click cam groove 33 is generally larger than the diameter of the sliding ring 22. It has a large width.

In order to apply an elastic force to the second/seventh space body 2 in the direction of opening it, a hook portion 35 formed on the click plate 30 by bending it under the internal force of the click plate 30 and a lower hinge plate 3 A tension coil spring 37 is mounted between the hook portion 36 and the hook portion 36 formed by bending this inward. ] As described above, the link mechanism 9 can be easily assembled without using screw members or the like, and the link mechanism 9 can be easily assembled with a small number of parts.

To assemble the case body connection device with the above configuration, first,
Hinge lever 21 and click plate 3 relative to lower hinge plate 3
0, the sliding shaft 22 is engaged with the guide cam groove 20 and the click force groove 33, the guide shaft 28 is engaged with the swing cam groove 29, and the guide groove 31 is also engaged with the swing cam groove 29. Sliding force l,
By engaging with the groove 32, the link mechanism 9 can be easily assembled to the lower hinge plate 3 without using a fastening member such as a screw member. The state in which this assembly is completed corresponds to FIG. 7. In this state, the second gauge body 2 is transferred to one side of the first gauge body 1 7, and the hinge pin 12 is set to the rotational position shown in FIG. , to fit the hinge pin 12 into the shaft hole 11. Then, after rotating the second gauge body 2 to the rotation position shown in FIG.
7, and fix the E-ring 25 to the hinge lever 2.

FIG. 1 is a diagram showing a state in which the second case body 2 and the first case body 1 are mutually closed, and in this state, the sliding shaft 22 and the hinge lever 21 are moved from the click plate 30 by the spring 37.
An elastic force in the opening direction is applied to the second case body 2 through 7.
Forced. However, the second case body 2 is fastened to the first case body 1 by a clamp member (not shown).

In this state, the arcuate portion 12b of the hinge pin 12 is in the horizontal position, and the guide shaft 28 is engaged with the water portion 29a of the swing cam groove 29, so the click plate 30 moves only in the horizontal direction. It is ready to be obtained.

When the second case body 2 is unlocked in this state, the click plate 30 moves to the left in the figure due to the elastic force of the spring 37, so the sliding shaft 22 is guided by the guide cup and groove 20. The second case body 2 moves toward the rear of the case body, and the second case body 2 moves toward the rear of the case body.
As shown in the figure, it opens slightly to the initial position. When the operator further rotates the second case body 2 by hand from this initial position, the click plate 30 moves horizontally to the position of the swing part 29b of the swing cam groove 29, and then the click board 30 It swings clockwise around the guide shaft 31 due to the elastic force of the tension coil spring 37.

FIG.
In this case, as shown in FIG. 5, the sliding shaft 22 engages with the engagement recess 33a of the click cam groove 33. A braking force is applied to a further opening operation. Furthermore, in this state, the inclined surface 33b of the click cam groove 33 intersects the guide cam groove 20 at a predetermined angle, so even if the operator releases his/her hand from the second case body 2, the sloping surface 33b of the click cam groove 33 crosses the guide cam groove 20 at a predetermined angle. As shown in FIG. 2, the second gauge body 2 is held at an angle of, for example, about 45°, and its inclination angle is maintained. In this state, for example, the jammed recording paper can be removed.

The operator further moves the second gauge body 2 from the state shown in FIG.
When the click plate 3 is rotated to open, the guide shaft 31
The sliding shaft 22 swings slightly counterclockwise about the click cam groove 33, and the sliding shaft 22 passes over the engagement recess 33a formed in the click cam groove 33. Then, when the second case body 2 is subsequently rotated,
The sliding shaft 22 is in a position where it comes into contact with the end of the groove 20 under the guiding force t, and the second case body 2 is in the fully open position as shown in FIG. The mutual maximum opening degree is regulated. In this position, the hinge lever 21
A stopper portion 21 a formed in the hinge pin 12 contacts the hinge pin 12 .

Under this condition, when the E-ring 25 is removed from the connecting shaft 23, the upper hinge plate 4, that is, the second
The case body 2 can be rotated to the separation angle of the maximum opening amount -, and at this time, one arcuate portion 1.2b of the hinge pin 12 is pulled out to the full position 13.

In this rotating state, if you lift the case body 2 by Y and L, the width of the short part 12C of the hinge pin 12 is smaller than the width of the extraction groove 2 and 3, so it is easy to remove. The second game body 2 can be separated from the second case body.

Also when connecting the second cogeus body 1 and the second case body 2, the connection can be easily performed by reversing the procedure described above.

In the illustrated embodiment, a shaft hole 1 is formed in the lower hinge plate 2 attached to the first case body 1, and a hinge pin 12 is attached to the hinge plate 4 attached to the second case body. In the case shown below, in the opposite case, the hinge pin 12 is attached to the lower hinge plate 3.
, and the shaft hole 11 may be formed in the lower hinge plate 4.

The connecting device for the case bodies can be applied to various image forming devices such as laser printers, as described in 1. What kind of thing can it be if it is connected to
It can also be applied.

For example, the present invention can be applied even when one of the case bodies 2 is a cover.

Effects of the Invention According to the present invention, the two case bodies are rotatably connected to the phase J-L by the shaft hole and the hinge pin, and the shaft hole has a diameter smaller than this diameter. The extraction grooves with the width dimension are continuous -), and the hinge pin is formed with a part with a dimension smaller than the width of the extraction groove.
The work of separating and connecting the two case bodies into phases 7jI can be easily done.

[Brief explanation of drawings]

Figure 1 is a sectional view showing the case body connection device of the present invention when the two case bodies are fully open, Figure 2 is an exploded perspective view of Figure 1, and the third figure shows the hinge plate. A perspective view, FIG. 4 is a sectional view showing the second case body opened to the initial position, FIG. 5 is a sectional view showing the second case body rotated by 45 degrees, and FIG. FIG. 7 is a cross-sectional view showing the state in which the second gauge body has been rotated to the fully open state, and FIG. 7 is a cross-sectional view showing the state in which the second gauge body is in the separated position.・Second game body, 3.5
...Lower hinge plate, 4.6...Upper hinge plate, 9...Link mechanism, 11...Shaft hole, 2...Hinge pin, 1
2b...Circular arc part, ], 2c...Short part, 13.
・Extraction groove. Patent applicant: Minolta Camera Co., Ltd. Figure 1

Claims (1)

[Scope of Claim] A case body connecting device for connecting a first case body and a second case body mutually in an openable and closable manner, wherein a shaft hole is formed in a first hinge member provided in the first case body. , a hinge pin that rotatably fits into the shaft hole is attached to a second hinge member provided on the second case body, and a maximum opening degree is established between the first case body and the second case body. the hinge pin has a cross-sectional shape of an oval shape having a circular arc portion corresponding to the diameter of the shaft hole and a short portion shorter than the diameter of the shaft hole; In this state, when the case bodies are rotated to a separation angle exceeding the maximum opening degree, an extraction groove is provided in the first hinge member for guiding the hinge pin to the outside of the first hinge member. A connecting device for the case body.