JPH05100509A - Open / close latch structure - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To provide an opening / closing hook structure that does not require screw tightening and facilitates installation work. A lever 4 pivotally supported by a frame 7 and a bearing such as a support member 6 located at a position separated from the lever 4 are fitted and connected to each other, and are rotated within a range regulated by a regulation unit. The open / close hook structure includes a hook member 5 and a pivot shaft integrally formed with hooks 51 and 52 that can be engaged with the hook means. In addition to having a supporting hole 71, at least one notch is formed on the circumference of the hole, projections 10 and 11 capable of inserting the notch are formed, and a restriction piece 9 is formed on the peripheral surface of the lever 4. The restricting means is rotatable by a predetermined angle up to the position where the hooks 51 and 52 are hooked by the hooking means after the turning shaft is connected to the lever 4, and the turning in the opposite direction is the above. By contacting the restriction piece 9 at an angle smaller than the predetermined angle, Removable restriction member 13
Have.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an opening / closing latching structure for latching an upper body and a lower body of a clamshell type image forming apparatus or the like.

[0002]

2. Description of the Related Art Conventionally, there has been known a clamshell type image forming apparatus in which an upper portion of a main body can be opened and closed with respect to a lower portion of the main body. In this type of device, the upper part of the main body is hooked on the lower part of the main body by a hooking structure as shown in FIG.

This latching structure, as shown in FIG.
1, the hook members 62 and 63, and the lever 64. The shaft 61 is rotatably supported by a lower end portion of a frame (not shown) above the main body. The hook members 62 and 63 are fixed to the shaft 61 by screws 621 and 631, respectively. The hook members 62 and 63 are hooked on a hooking member (not shown) provided on the frame at the lower part of the main body by the urging force of the springs 622 and 632, so that the upper part of the main body is Is to be attached to the bottom of the main body. The lever 64 is fixed to one end of the shaft 61 with a screw 641.

When the upper part and the lower part of the main body are closed, the hook members 62, 63 are set by the springs 622, 632.
Is hooked to the hooking member of the frame at the lower part of the main body and is in a hooked state. On the other hand, when the lever 64 is rotated clockwise against the springs 622 and 632, the hook members 62 and 63 are disengaged from the hooking member. The hanging state is released.

[0005]

However, in the hooking structure, the shaft 61 is attached to the frame on the upper part of the main body after the members arranged on the upper part of the main body are assembled, and the hook members 62, 63 and the lever are attached. 64 screws 621, 63
It is constructed by tightening and fixing with 1 etc.

Therefore, each member incorporated in the upper portion of the main body interferes with the work of tightening the screws 621, 631 and the like. In addition, the number of parts such as screws is large, and there has been a demand for a simplified hooking structure.

An object of the present invention is to solve the above problems, and to provide an opening / closing hook structure that does not require screw tightening and facilitates installation work.

[0008]

In order to achieve the above-mentioned object, the present invention is provided with a hooking means provided on one main body side which is relatively opened and closed, and on the other main body side, the other main body side. Is engaged with and connected to a lever axially supported by the frame and a bearing at a position separated from the lever, and is engaged with the locking means by rotation within a range regulated by the regulation means. An opening / closing hook structure having a turning shaft integrally formed with a matable hook, wherein the frame has a hole for axially supporting the lever, and at least one hole is provided on the circumference of the hole. The lever has a plurality of notches, and the lever is formed with a projection capable of inserting the notch when the lever is connected to the rotating shaft through the hole, and is connected to the rotating shaft. In the state, a restriction piece is formed on the outer surface of the hole and on the peripheral surface of the lever. The restriction means allows the hook to rotate by a predetermined angle up to a position where the hook is caught by the hooking means after the turning shaft is connected to the lever, and the turning means does not turn in the opposite direction. It has a detachable regulating member that regulates by contacting the regulating piece at an angle smaller than the predetermined angle.

[0009]

According to the opening / closing latch structure of the above structure, the lever is
The protrusion and the notch of the hole of the frame are opposed to each other, and the protrusion is inserted into the notch so that the protrusion is connected to the rotary shaft.
After the rotation shaft and the lever are connected, the hook is rotated by a predetermined angle up to the position where the hook is caught by the hooking means, so that the one main body and the other main body can be closed by the hook. On the other hand, the rotation in the opposite direction from the position is restricted to a position at an angle smaller than the predetermined angle at which the restricting member and the restricting piece come into contact with each other, and the protrusion and the notch face each other, and the lever comes off the rotating shaft. Can be prevented.

[0010]

FIG. 2 is an overall configuration diagram showing an example of a clamshell type image forming apparatus (copying machine) to which the opening / closing latch structure according to the present invention is applied. In the copying machine, the main body upper part 2 and the main body lower part 3 are provided with a shaft 44 which is provided at a proper position on one end side of the copying machine.
It has the structure connected by. Above body 2
Is rotated about the shaft 44 so that the lower portion 3 of the main body is opened and closed by this rotation. An urging means such as a compression coil (not shown) is provided between the upper body 2 and the lower body 3 so that the upper body 2 can be opened with a relatively small force.

The contact glass 2 is provided on the upper portion 2 of the main body.
0, a document retainer 21, an optical system L, a photosensitive drum 31, a charging device 32, a blank lamp 33, a developing device 34, a cleaning device 37, a registration roller 401, and the like. On the other hand, in the lower part 3 of the main body, the paper feed cassette 3
8, paper feed roller 39, registration roller 402, transfer device 35, separation device 36, fixing device 42, discharge roller pair 43
Also, a discharge tray 41 and the like are provided. Further, a hooking portion 1 is provided at a proper position on the other end side of the main body upper portion 2 so that the main body upper portion 2 is hooked on the main body lower portion 3.

The optical system L includes a first moving frame 25 having a document irradiation lamp 22 such as a halogen lamp, a reflecting plate 23 and a mirror 24, a second moving frame 28 having mirrors 26 and 27, and a lens 29. And a mirror 30, which guides the image of the original document placed on the contact glass 20 to the photosensitive drum 31 below.

Then, the surface potential of the photoconductor drum 31 is set by the charging device 32, and the charge of the unnecessary area is removed by the blank lamp 33, and then the image of the original is formed. This latent image is visualized by the developing device 34, transferred to the transfer paper by the transfer device 35, and separated by the separating device 3.
The transfer paper after transfer is separated from the photosensitive drum 31 by 6. On the other hand, the toner remaining on the photosensitive drum 31 is removed by the cleaning device 37.

A paper feed cassette 38 is detachably attached to one end surface of the copying machine, and the transfer paper in the paper feed cassette 38 is taken out by a paper feed roller 39. The transfer paper taken out is fed to the photosensitive drum 31 by the pair of registration rollers 401 and 402 in synchronization with the scanning of the optical system L.

The transfer paper after being separated from the photosensitive drum 31 is fixed by a fixing device 42, and the transfer paper after fixing is discharged to a discharge tray 41 by a discharge roller pair 43.

Next, the detailed structure of the hooking portion 1 will be described with reference to FIG. The hooking portion 1 is composed of a lever 4, an elongated hook member 5 and a support member 6, and the lever 4 and the support member 6 are fitted to both sides of the hook member 5. The lever 4 and the support member 6 are respectively loosely fitted in support holes 71 and 72 formed in the front and rear surfaces of the frame 7 of the main body upper part 2, whereby the hook member 5 is rotatably supported by the frame 7. Has been done.

On the peripheral surface of the lever 4, an elongated knob 41, a spring hook piece 8, a restriction piece 9 and projections 10 and 11 are integrally formed. One end of the spring 81 is locked to the spring hook piece 8, and the other end is locked to the upright portion 73 formed on one of the front surfaces of the frame 7. The lever 4 is biased counterclockwise by a spring 81.

The restriction piece 9 has a lower end of a notch 74 formed by cutting out a part of the upright portion 73 and the restriction member 1 described later.
The rotation amount of the lever 4 is regulated by being inserted between the three. The restriction member 13 is fixed to the upright portion 73 by fitting the locking member 131 (FIG. 4) provided on the upper portion thereof into the locking hole 75 (FIG. 4) formed in the upright portion 73. It has become. Further, the lower end side of the regulating member 13 faces the upper portion of the cutout 74 of the frame 7, and by such a configuration, the clockwise rotation of the regulating piece 9 is regulated.

The protrusions 10 and 11 are formed on the rear portion of the lever 4 so as to be separated from each other by a predetermined angle, while the support hole 7 is provided.
On the circumference of 1, the notches 711 and 712 (FIG. 3) having dimensions and shapes through which the protrusions 10 and 11 can pass are provided.
Notched at an angle corresponding to 1. Then, the lever 4 has the support hole 71 in which the protrusions 10 and 11 and the notches 711 and 71 are formed.
2 is inserted at an opposite angle, and in this state, the protrusions 10 and 11 and the notch 7 are rotated counterclockwise, for example, by 90 °.
By shifting the angular position with respect to 11, 712, the movement of the lever 4 in the axial direction is restricted, and the hook member 5 is prevented from coming off.

The hook member 5 is formed in a U-shape in cross section and has hooks 51,
52 are projected. The hooks 51 and 52 are
The upper body 2 is hooked on the lower body 3 by being hooked on a locking member 14 (FIG. 4) provided on the frame of the lower body 3.

The support member 6 has a spring hooking piece 15 at an appropriate position on the circumferential surface.
Is projected. The spring hook piece 15 locks one end of the spring 151, and the other end of the spring 151 is connected to the frame 7
It is locked to the upright portion 76. The support member 6 is biased counterclockwise by the spring 151.

Next, the procedure for attaching the above-mentioned hook 1 to the copying machine will be described with reference to FIGS. 3 and 4. First, the support member 6 is supported in the support hole 72 with one end of the hook member 5 fitted to the support member 6. Subsequently, as shown in FIG. 3, the lever 4 is supported from the front side of the drawing in a state in which the protrusions 10 and 11 and the notches 711 and 712 face each other, that is, in a posture in which the knob 41 of the lever 4 faces downward. To the other end of the hook member 5 to connect (connect)
To do. The hooks 51 and 52 are located at an angle (left side in the drawing) deviated from the knob 41 by approximately 90 °.

Then, the lever 4 is rotated counterclockwise by about 90 °.
In this state (state of FIG. 4), the spring 81 is hooked between the spring hook 8 and the upright portion 73 of the frame 7, and at the same time, the spring 1 is held between the spring hook 15 of the support member 6 and the frame 7.
Hook 51. As a result, the hook 5 of the hook member 5
1, 52 are hooked on the locking member 14 of the lower body 3 by the urging force of the springs 81, 151, and the upper body 2 of the main body 3 is lowered.
Be hooked on.

Further, in the above state, the restriction piece 9 is provided with the cutout 74.
The locking member 13 is fixed to the upright portion 73 of the frame 7 in this state, so that the clockwise rotation of the lever 4 is restricted. As a result, lever 4
Does not rotate to a position where the protrusions 10 and 11 and the notches 711 and 712 face each other, and the hook member 5 is prevented from coming off.

As described above, since the hooking portion 1 can be assembled without using screws or the like, the assembling work is simplified. In addition, the lever 4 has a spring hook piece 8, a restricting piece 9 and protrusions 10 and 1.
Since 1 is integrally formed, the number of parts is reduced.

Further, since the hooks 51 and 52 are integrally formed with the hook member 5, the hook members 62 and 63 as shown in the conventional hooking structure of FIG.
The strength can be improved as compared with the case of fixing each by 31. Further, since the hook member 5, the lever 4, and the support member 6 are not fixed by screws or the like but are connected by fitting, even when stress is generated in the hook portion 1 when the upper portion 2 of the main body is opened and closed. The transmission of the moment due to the stress between the hook member 5 and the lever 4 and the support member 6 is reduced, which prevents the hook member 5 from twisting when opening and closing.

Next, another embodiment of the hooking portion 1 will be described with reference to FIG. In this embodiment, the regulation member 1
Ribs 161 provided on the exterior cover 16 of the copying machine instead of 3
Thus, the clockwise rotation of the restriction piece 9 is restricted.

That is, the rib 161 is previously formed inside the outer cover 16 so as to come to a position to be fitted into the upper portion of the notch 74 when the outer cover 16 is closed.
Then, after the restriction piece 9 is inserted below the notch 74 as described above, the outer cover 16 is closed and fixed to the frame 7 with the screw 162, so that the rib 161 is fitted into the upper portion of the notch 74. Become. As a result, the clockwise rotation of the restriction piece 9 is restricted.

In this way, the exterior cover 16 is attached to the frame 7
Since the clockwise rotation of the restriction piece 9 is restricted only by fixing the restriction member 9 to the above position, it is not necessary to attach the above-mentioned restriction member 13, and the work man-hours and the number of parts are reduced accordingly. Further, when the outer cover 16 is removed from the frame 7, the rib 161 is also removed from the notch 72, so that the spring 8 can be used for maintenance or the like.
The hooking portion 1 can be easily disassembled simply by removing 1, 151.

In the above explanation, the lever 4 has two protrusions.
Although it is formed in one place, it is not limited to this, and it may be formed in one place, or in three or more places. In this case, a notch is formed in the circumference of the support hole 71 in accordance with the protrusion.

[0031]

According to the present invention, after the rotation shaft and the lever are connected to each other, the hook is rotated by a predetermined angle up to the position where the hook is caught by the locking means, and the rotation from the above position in the opposite direction is restricted by the restriction member and the restriction piece. And are contacted with each other and regulated to an angle smaller than the above-mentioned predetermined angle, so that the lever is prevented from coming off the rotating shaft. Further, since no screw or the like is used, the assembling work can be simplified and the number of parts can be reduced. Further, since the hook is formed integrally with the rotating shaft, the strength can be improved as compared with the conventional hook member fixed to the shaft with screws. Further, since the rotary shaft and the lever are connected by fitting, even if a stress is generated in the opening / closing latch structure when the main body is opened / closed, the moment due to the stress can be transmitted between the rotary shaft and the lever. It is reduced, and twisting of the rotating shaft can be prevented.

[Brief description of drawings]

FIG. 1 is a perspective view showing a structure of a hook portion according to the present invention.

FIG. 2 is an overall configuration diagram showing a clamshell type image forming apparatus.

FIG. 3 is a side view showing a procedure for assembling the hooking portion.

FIG. 4 is a side view showing a procedure for assembling the hooking portion.

FIG. 5 is a side view showing another embodiment of the structure of the hooking portion.

FIG. 6 is a perspective view showing a conventional hooking structure.

[Explanation of symbols]

 1 Latching Part 2 Upper Body 3 Lower Body 4 Lever 5 Hook Member (Rotating Shaft) 6 Supporting Member 7 Frame 9 Restricting Piece (Regulating Means) 10, 11 Projection 13 Restricting Member 14 Latching Member (Latching Means) 41 Knob 44 shaft 51,52 hook 71,72 support hole 74 notch 711,712 notch

Claims (1)

[Claims] 1. A latching device provided on one main body side that is relatively opened and closed, and a lever that is pivotally supported by a frame on the other main body side and the lever are separated from each other on the other main body side. A rotation shaft integrally fitted with and connected to the bearing at a position, and a hook that is engageable with the hooking means by rotation within a range regulated by the regulation means. The frame has a hole for axially supporting the lever, and at least one notch on the circumference of the hole. The lever has the above-mentioned peripheral surface. A protrusion is formed through which the notch can be inserted when it is connected to the rotation shaft through the hole, and is restricted to the outer surface of the hole and the peripheral surface of the lever in the connection state with the rotation shaft. A piece is formed, and the rotation shaft of the restriction means is connected to the lever. After the contact, the hook is rotatable by a predetermined angle up to the position where it is hooked on the hooking means, and the rotation in the opposite direction from the position is restricted by contacting the restriction piece at an angle smaller than the predetermined angle. An opening / closing hook structure having a detachable restricting member.