TW202416043A - Opening-closing device and office equipment using the same - Google Patents

Abstract

The invention provides an opening-closing device and an office equipment using the same, wherein the opening-closing device will still be opened and closed smoothly and can avoid making strange noises even if the opening-closing body is opened and closed for a long time. The opening-closing device includes: an installing member, which is installed on the device body of the office equipment; a supporting member, which supports the opening-closing body, wherein the opening-closing body is installed on the installing member through a hinge axis to be rotated; and a sliding member, which is accommodated in the supporting member, wherein the sliding member can slide inside the supporting member while the opening-closing body is uner the operation of opening or closing, and allow the elastic member to act between the free end side of the supporting member and the cam member provided on the installing member. A lubricating oil groove is provided on the inner side of the supporting member and/or on the outer side of the sliding member for accumulation of lubricating oil.

Description

Opening device and business machine using the same

The present invention relates to an opening device and an office machine using the opening device. The opening device is particularly suitable for office machines such as copiers, compound machines, printers, fax machines and scanners.

In the past, on the device body of office machines such as photocopiers, multifunction machines, printers, fax machines and scanners, a manuscript pressing plate was installed on the upper rear part of the device body through an opening device so that it could be opened. The opening device is also called a manuscript pressing plate opening device, which is a hinge mechanism. For example, as described in Japanese Patent Publication No. 2013-8038, the manuscript pressing plate is supported around the hinge axis to open and close, so that the manuscript can be pressed against the exposure glass surface on the device body and the exposure glass surface can be exposed. In order to set the original on the exposure glass surface, first rotate the original pressing plate (open upward) to expose the exposure glass surface (open), then place the original on the exposure glass surface, and then rotate the original pressing plate (close downward) to press the original on the exposure glass surface with the original pressing plate.

In the above-mentioned known structure of the office machine, if the manuscript pressing plate is to be opened and closed, the opening device that mounts the manuscript pressing plate on the device body so as to be opened and closed will rotate its supporting member with the hinge shaft as a fulcrum, and the sliding member pressed into and slidably accommodated in the supporting member will start to slide. In order to resist the sliding of the sliding member at this time, the opening device is provided with a compression coil spring, and the sliding member will press the cam member provided on the side of the mounting member, so that the manuscript pressing plate will generate a suitable load during the opening operation. Therefore, the document pressing plate will apply force to the device body in the closing direction through the opening device in the closed state, so that the document pressing plate is kept at the middle opening angle or even kept in the fully open state without falling naturally. In addition, the sliding member slides in a pressed state inside the supporting member every time the document pressing plate is opened and closed.

The above-mentioned known opening and closing devices are shipped with lubricating oil applied to the sliding surfaces of the slider and the supporting member. However, due to long-term use, when the lubricating oil is worn out, it will not only hinder the opening and closing operation of the manuscript pressing plate (considering that the manuscript pressing plate opening and closing device of the present invention may also be used in office machines other than copiers and multifunction machines, it will be simply referred to as the opening and closing body below) but also cause problems such as strange noises. These problems tend to surface earlier when the slider is firmly pressed into the embedded supporting member.

In order to solve the above problems, the purpose of the present invention is to provide an opening device and an office machine using the opening device, which will not cause the opening to be unsmooth and avoid making strange noises even when the opening body is opened for a long time. In addition, the opening device of the present invention has an implementation form using one sliding member and an implementation form using two sliding members, namely a first sliding member and a second sliding member. Therefore, when the sliding member is simply described in the scope of the patent application, the sliding members of the above two implementation forms are included.

To achieve the above-mentioned purpose, an embodiment of the present invention includes a mounting member, a supporting member and a sliding member, wherein the mounting member is mounted on the device body of the business machine; the supporting member supports the opening body, and the opening body is mounted on the mounting member through a hinge shaft so as to be rotatable; the sliding member is accommodated inside the supporting member so as to slide inside the supporting member accompanying the opening operation of the opening body, and allows the elastic member to act between the free end side of the supporting member and the cam member provided on the mounting member. A lubricating oil groove is provided on the inner side of the supporting member and/or the outer side of the sliding member, and the lubricating oil used for lubrication is accumulated in the lubricating oil groove.

Secondly, in an embodiment of the present invention, the sliding member is composed of a first sliding member and a second sliding member, the first sliding member is arranged on the free end side of the supporting member; the second sliding member is arranged on the cam member side.

Furthermore, in an embodiment of the present invention, the lubricating oil groove is arranged in a direction perpendicular to the sliding direction of the sliding member.

Then, in one embodiment of the present invention, a lifting member is further installed on the free end side of the supporting member, and the lifting member supports the opening body through a hinge shaft. The first sliding member and the second sliding member arranged on the free end side of the supporting member allow the elastic member to take effect between an actuating member and the cam member arranged on the lifting member.

Furthermore, in one embodiment of the present invention, a discharge groove is provided on the first sliding member, which is located on the side of the first sliding member that contacts the upper plate of the supporting member and is arranged at a specific distance.

In addition, in one embodiment of the present invention, a protrusion is provided on the second sliding member, which is located on the side of the second sliding member that contacts the upper plate of the supporting member.

Furthermore, the transaction machine of the present invention uses the door opening device described above.

As described above, the present invention provides an opening device and an office machine using the opening device. Since a groove for accumulating lubricating oil is provided on at least one of the supporting member and the sliding member or on the sliding surfaces of both sides, the lubricating oil between the supporting member and the sliding member can be prevented from being consumed due to repeated opening operations of the opening body. The opening failure of the opening body after years of opening operations can also be reduced, and strange noises can be avoided.

The following is a detailed description of the opening device of the present invention and a business machine using the opening device according to the drawings.

FIG1 is a photocopy machine, which is one example of an office machine using an opening device. According to the figure, the opening body C is installed on the device body a of the photocopy machine A through the opening device B of the present invention and the opening device B' of a simple structure different from the structure of the opening device B, so that the opening body C can be opened. And through the opening devices B and B', the opening body C can be opened from the closed position on the upper surface of the contact device body a to the maximum use opening angle.

Figures 2 to 6 are specific schematic diagrams of one example of an opening device B of an embodiment of the present invention. As shown in the three-dimensional diagram of Figure 2, the opening device of the present invention has a mounting member 4, a supporting member 5, and a lifting member 6. In addition, the supporting member 5 includes a first sliding member 31, a second sliding member 32, and a compression coil spring 21 of a sliding member, and the compression coil spring 21 applies force to separate the first sliding member 31 and the second sliding member 32 from each other. The mounting member 4 and the supporting member 5 are connected by the first hinge shaft 11 so as to rotate relative to each other. In addition, the supporting member 5 and the lifting member 6 are installed by the second hinge shaft 12 so as to rotate relative to each other. The adjustment plate 71 included in the mounting member 4 is provided to adjust the mounting position of the mounting member 4 relative to the device body a.

In the exploded perspective view of FIG3 , the mounting member 4 includes a bottom plate 41, two side plates 42, 42, a rear plate 43, and a curved recess 44. The bottom plate 41 is mounted on the device body a; the two side plates 42, 42 extend from the two side ends of the bottom plate 41 in a direction perpendicular to the bottom plate 41 (including a direction slightly perpendicular to the bottom plate 41); the rear plate 43 extends from one end (rear end) of the bottom plate 41 in a direction perpendicular to the bottom plate 41 (including a direction slightly perpendicular to the bottom plate 41), and is slightly rectangular; the curved recess 44 is formed on one side of the two side plates 42. Among them, stoppers 48, 48 are provided on the side of the rear plate 43 of the two side plates 42.

The bottom plate 41 is formed in a roughly rectangular shape and is provided with a mounting hole 45 for mounting the device body a with screws or the like. The two side plates 42, 42 are formed in a roughly L-shape and are provided with a first hinge hole 46 at the front end (upper part). The cam member hole 47 is provided at a position close to the side (lower part) of the bottom plate 41 and slightly inside (front) of the first hinge hole 46. The cam member 13 is inserted through the cam member hole 47. In the embodiment, the cam member 13 is in a shaft shape, but is not limited thereto and also includes other shapes provided between the two side plates 42, 42 of the mounting member 4.

An adjustment plate 71 that can slide relative to each other is provided on the bottom plate 41 of the mounting component 4. A slightly rectangular rear plate 75 extends from one end (rear end) of the adjustment plate 71 in a direction perpendicular to the adjustment plate 71 (including a slightly perpendicular direction). As shown in FIG. 4 , an adjustment screw 74 passes through the rear plate 43 of the mounting component 4 and is screwed onto the rear plate 75. The mounting holes 72, 73, and 76 of the adjustment plate 71 are for mounting the adjustment plate 71 on the mounting hole of the device body a. The adjustment plate 71 is clamped on the bottom plate 41 of the mounting component 4 and locked on the device body a. In addition, the opening body C is mounted on the opening device B, and the adjustment screw 74 is turned so that the opening body C is in the appropriate position relative to the device body a when it is closed. After confirming that they are in the appropriate positions, the screw torque of the mounting holes 72 and 73 is increased, and the mounting member 4 is locked to the device body a through the mounting hole 45 provided on the bottom plate 41 of the mounting member 4. On the bottom plate 41, the adjustment holes 49a and 49b having a larger diameter than the mounting holes 72 and 73 of the adjustment plate 71 are overlapped with the mounting holes 72 and 73, so that the mounting position of the mounting member 4 can be adjusted by sliding. In addition, in particular, in FIG. 3, symbols 81 and 82 are mounting screws for mounting the bottom plate 41 and the adjustment plate 71 to the device body a, and symbol 83 is a mounting button screw.

In the exploded perspective view of FIG3 , the support member 5 includes an upper plate 51, two side plates 52, 52, and clamping pieces 53, 53. The two side plates 52, 52 are respectively vertically provided from the two side ends of the upper plate 51 in a direction perpendicular to the upper plate 51 (including a direction substantially perpendicular to the upper plate 51); the clamping pieces 53, 53 are formed by bending the sides of the front ends of the two side plates 52, 52 facing each other at 90°.

The second hinge hole 55 through which the second hinge 12 is inserted is provided at one end (front end) of the side plates 52, 52, and a notch 54 for inserting the actuating member 14 is provided. The first hinge insertion hole 56 is provided at the other end (rear end) of the side plates 52. The first hinge insertion hole 56 of the side plates 52 and the first hinge hole 46 of the mounting member 4 are aligned and the bearing member 84 is inserted through these holes. The first hinge 11 is inserted through the bearing portion of the bearing member 84 and is restricted from falling off by an open stopper 86, which is locked on the circumferential groove 11a provided at both ends of the first hinge through a washer 85. In this way, the supporting member 5 is connected to the mounting member 4 with the first hinge shaft 11 as an axis and can rotate freely.

The lifting member 6 is formed into a substantially U-shaped shape by an upper plate 61 and two side plates 62, 62 and covers the support member 5. The upper plate 61 is mounted on the rear end side of the opening body C by screws or the like; the two side plates 62, 62 are respectively vertically arranged from the two ends of the upper plate 61 in a direction perpendicular to the upper plate 61 (including a direction substantially perpendicular to the upper plate 61). The second hinge shaft insertion hole 63 is provided at the center of one end (front end) of the lifting member 6 near the upper plate 61 side, and an actuating member hole 64 is provided for inserting the shaft-shaped actuating member 14 provided below the second hinge shaft insertion hole 63. The actuating member 14 is inserted through and fixed to the actuating member holes 64 of the two side plates 62. Furthermore, the actuating member 14 may be a shaft, or an actuating member (not shown) hanging from the upper plate 61 of the lifting member 6, or a pressing member (not shown) mounted on the actuating member. By aligning the second hinge insertion holes 63 of the two side plates 62 of the lifting member 6 and the second hinge holes 55 of the two side plates 52 of the supporting member 5 and inserting the second hinge 12 through these holes, the lifting member 6 and the supporting member 5 are connected through the second hinge 12 so that the rotation direction is reversed. In addition, the upper plate 61 is provided with an adjusting screw 65, the front end of which abuts against the upper plate 51 of the supporting member 5, and adjusts the parallelism with the original document placement table a1 mounted on the opening body C of the lifting member 6. Furthermore, reference numerals 67 and 67 are mounting plate portions used when mounting the opening body C.

A pair of first sliders 31 and second sliders 32 are slidably received in the support member 5. The pair of first sliders 31 and second sliders 32 form a bottomed cylindrical body with a rectangular cross section. The first slider 31 and second slider 32 are respectively sandwiched by the clamping pieces 53, 53 in the support member 5 so that their openings face each other, and each is freely slidably received between the support member 5. A compression coil spring 21 is provided between the pair of first sliders 31 and second sliders 32. That is, the spring receiving parts 31g (FIG. 8) and 32c (FIG. 3) for receiving the compression coil spring 21 are formed inside the recesses of the first slider 31 and second slider 32. The compression coil spring 21 can be one or more than two, for example, two are arranged in parallel or in combination, and in the embodiment, the compression coil spring 21 applies force in the direction of separating the first sliding member 31 and the second sliding member 32 from each other. In addition, in this specification and the scope of the patent application, the compression coil spring is also referred to as an elastic member.

As shown in FIG. 4 , a pair of first sliding members 31 and second sliding members 32 have a length sufficient to be embedded in the support member 5 when the bottom plate 41 and the support member 5 (upper plate 51 ) are approximately parallel in the closed state.

The bottom surface of the first sliding member 31 on the front end side is also formed as a flat surface as the outer surface of the closing surface 31a. The closing surface 31a pushes the actuating member 14 by the pressure of the compression coil spring 21, so that the supporting member 5 and the lifting member 6 overlap. That is, the adjusting screw 65 provided on the upper plate 61 of the lifting member 6 abuts against the upper plate 51 of the supporting member 5 by the pressure of the compression coil spring 21, and the upper plate 51 of the supporting member 5 and the upper plate 61 of the lifting member 6 are slightly parallel and close to each other.

A protrusion 33 is provided at the approximate center of the outer surface of the closing surface of the second sliding member 32 on the rear end side (Fig. 9). Furthermore, the protrusion 33 forms a gradually inclined inclined portion 34 on the side of the clamping piece 53. When the opening body is closed, the protrusion 33 abuts against a fixed member such as the cam member 13, and the portion abutting against the cam member 13 slowly slides from the protrusion 33 to the inclined portion 34 by the lifting member 6 rotating around the second hinge shaft 12. The outer periphery of the cam member 13 is coated with a lubricating oil for general lubrication. An extension piece 38 is provided protruding from the lower side of the second sliding member 32 to the rear side of the cam member 13.

In the closed state of the opening body C shown in FIG4 , a part of the clamping piece 53 of the supporting member 5 is embedded in the curved recess 44 of the mounting member 4, and the extension piece 38 covers the periphery of the cam member 13, especially the side of the device body a. This is to prevent the lubricating oil applied to the cam member 13 from adhering to the device body a. In this state, by holding the side of the opening device B on which the opening body C is installed, and rotating the opening body C with the first hinge shaft 11 as the axis in the direction away from the top of the device body a (upward), the second slide member 32 abuts against the cam member 13 and slowly slides from the protrusion 33 to the inclined portion 34 as shown in FIG5, and the second slide member 32 is pushed and slid to the rear end side through the compression coil spring 21 in the support member 5, so that the compression coil spring 21 slowly extends. And as shown in FIG6, when the opening body C becomes the maximum use opening position on the device body a, the compression coil spring 21 is in the maximum stretched state.

Lubricating oil is applied to the sliding surfaces of the second sliding member 32 and the supporting member 5 to ensure smooth sliding. In addition, the present invention takes measures to prevent the lubricating oil from being used up due to continuous sliding.

In Fig. 7, the sliding surface 58 that slides with the second sliding member 32 on the back side of the upper plate 51 of the support member 5 is provided with a lubricating oil groove 57 formed by extension stamping processing and cutting. The lubricating oil groove 57 is formed in a direction substantially perpendicular to the sliding direction of the second sliding member 32, and is a structure that accumulates lubricating oil in the lubricating oil groove 57. In addition, the lubricating oil diffused by the unidirectional sliding will return to the lubricating oil groove 57 again due to the reverse sliding, so that even if the sliding continues, the lubricating oil can be prevented from running out.

The first slide member 31 is a structure that slides in the support member 5 in order to stabilize the state of the lifting member 6. In Figures 8 (a) and (b), the first slide member 31 and the upper plate 51 of the support member 5 and the sliding surface 31d and the clamping piece 53 are molded with lubricating grooves 31b, 31e, and a retreat groove 31f. The lubricating grooves 31b and 31e are grooves that are slightly perpendicular to the sliding direction of the support member 5, and the lubricating grooves 31b and 31e are structures for accumulating lubricating oil. In addition, the retreat groove 31f is formed along the sliding direction. The groove is deeper than the lubricating groove 31b.

The second slider 32 is a structure that slides in the support member 5 in order to control the opening torque of the opening body. In Figures 9 (a) and (b), lubricating grooves 32e, 32e, 32g, and 32g are molded on the sliding surface 32d that slides on the upper plate 51 of the support member 5 of the second slider 32 and the sliding surface 32f that slides on the clamping piece 53. The sliding surface of the second slider 32 does not contact the entire surface of the upper plate 51 of the support member 5, but only the sliding surface 32d contacts. In Figure 9 (b), the surfaces 32h and 32h other than the sliding surface 32d are made lower than the sliding surface 32d to avoid sliding friction. The lubricating oil grooves 32e, 32e, 32g, 32g are formed in a direction slightly perpendicular to the sliding direction of the supporting member 5, and the lubricating oil is accumulated in the lubricating oil grooves 32e, 32e, 32g, 32g.

FIG10 is an enlarged cross-sectional view of the upper plate 51 of the support member 5 and the sliding parts of the first sliding member 31 and the second sliding member 32. In FIG10, reference numerals 91, 91 represent the lubricating oil accumulated in the lubricating oil grooves 31b, 31b, and reference numerals 92, 92 represent the lubricating oil accumulated in the lubricating oil grooves 32e, 32e. Furthermore, reference numerals 93, 93 represent the lubricating oil accumulated in the lubricating oil grooves 57, 57 provided in the upper plate 51. Although not shown in the figure, the lubricating oil is also accumulated in the lubricating oil grooves 31e, 31e of the first sliding member 31, and the lubricating oil is also accumulated in the lubricating oil grooves 32g, 32g of the second sliding member 32. Since the first sliding member 31 and the second sliding member 32 and the supporting member 5 are inserted and abutted, the gap between them is small, which easily causes the lubricating oil to run out. However, sufficient lubricating oil can be accumulated in the lubricating oil grooves 32e and 57 with a larger gap between them, and the first sliding member 31 and the second sliding member 32 slide in the supporting member 5 through the opening action of the opening body C, so that the lubricating oil accumulated in the lubricating oil grooves is applied to the sliding surface. Because the first sliding member 31 and the second sliding member 32 slide in the supporting member 5 through the opening operation of the opening body C, the lubricating oil is applied again when the opening operation is repeated, and a smooth sliding state is always maintained.

There is no need to provide the above-mentioned lubricating oil grooves 57, 31b, 31e, 32e, 32g. For example, by providing the lubricating oil groove 57 on the side of the supporting member 5, or by providing only the lubricating oil grooves 32e, 32g on the side of the second sliding member 32, the effect of suppressing the depletion of the lubricating oil can be obtained.

In such an opening and closing device, by providing a lubricating oil groove in at least one of the supporting member 5, the second sliding member 32, and the first sliding member 31, even if the opening and closing body C is repeatedly opened and closed, the lubricating oil of the opening and closing device can be prevented from being exhausted, and smooth opening and closing operations can be performed for a long time.

The opening device B shown in the above embodiment is a lifting member 6 on the free end side of the supporting member 5 that can rotate in the opposite direction to the supporting member 5. The opening device of the present invention is not limited to this, and is also applicable to installing the opening body C on the supporting member and omitting the lifting member. In this case, the only sliding member left is the second sliding member provided between the free end side of the supporting member and the cam member. In this case, one end of the compression spring is pressed against the free end side of the supporting member. The opening device of the present invention also includes the opening device of the above structure.

Due to the structure as described above, the present invention can provide an opening device and an office machine using the opening device. Even if the opening device is operated for a long time, it will not cause the opening to be unsmooth and can avoid making strange noises.

11: First hinge shaft 11a: Circumferential groove 12: Second hinge shaft 13: Cam member 14: Actuating member 21: Compression coil spring 31: First sliding member 31a: Closing surface 31b, 31e, 32e, 32g: Lubricating oil groove 31c, 31d, 32d, 32f: Sliding surface 31f: Retracting groove 31g: Spring receiving portion 32: Second sliding member 32c: Spring receiving portion 32h: Surface 33: Protrusion 34: Inclined portion 38: Extension piece 4: Mounting member 41: Bottom plate 42: Side plates 43: Rear plate 44: Bending concave portion 45: Mounting hole 46: First hinge hole 47: Cam member hole 48: Stopper 49a, 49b: Adjustment hole 5: Support member 51: Upper plate 52: Side plates 53: Clamping piece 54: Cutout 55: Second hinge hole 56: First hinge insertion hole 57: Lubricating oil groove 58: Sliding surface 6: Lifting member 61: Upper plate 62: Side plates 63: Second hinge insertion hole 64: Actuating member hole 65: Adjustment screw 67: Mounting plate 71: Adjustment plate 72, 73: Mounting hole 74: Adjustment screw 75: Back plate 76: Mounting hole 81, 82 Mounting screw 83: Mounting button screw 84: Bearing component 85: Gasket 86: Opening stopper 91, 92, 93: Lubricating oil A: Copier a: Device body a1: Original loading platform B, B’: Opening device C: Opening body

FIG. 1 is a perspective view of a photocopier using the opening device of the present invention, and the photocopier is one example of an office machine. FIG. 2 is a perspective view of the opening device of the present invention. FIG. 3 is a disassembled perspective view of the opening device of the present invention. FIG. 4 is a cross-sectional view of the opening device of the present invention when the opening body is closed. FIG. 5 is a cross-sectional view of the opening body of the opening device of the present invention when it is at a middle opening angle. FIG. 6 is a cross-sectional view of the opening body of the opening device of the present invention when it is opened to a full opening angle. FIG. 7 is a perspective view of the supporting member in the state shown in FIG. 3 viewed from another angle. FIG8 is a three-dimensional view of the first sliding member of the present invention, (a) is a three-dimensional view of the state shown in FIG3 viewed from another angle; (b) is a three-dimensional view when viewed from a different angle from (a). FIG9 is a three-dimensional view of the second sliding member of the present invention, (a) is a three-dimensional view of the state shown in FIG3 viewed from another angle; (b) is a three-dimensional view when viewed from a different angle from (a). FIG10 is a partial enlarged cross-sectional view of the supporting member and the sliding portion of the second sliding member of the present invention.

11: First hinge

11a: Peripheral groove

12: Second hinge axis

13: Cam component

14: Actuating component

21: Compression coil spring

31: First sliding member

31a: Closed surface

31b: Lubricating oil groove

32: Second sliding member

32c: Spring storage part

32e: Lubricating oil groove

38: Extension piece

4: Install components

41: Base plate

42: Side panels

43: Back panel

44: curved concave part

45: Mounting hole

46: First hinge hole

47: Cam component hole

48: Stopper

49a, 49b: Adjustment holes

5: Support components

51: Go up to the board

52: Side panels

53: Clamping piece

54: Incision

55: Second hinge hole

56: First hinge shaft insertion hole

6: Lifting components

61: Go up to the board

62: Side panels

63: Second hinge shaft insertion hole

64: Actuating component hole

65: Adjustment screw

67: Mounting plate

71: Adjustment plate

72, 73: Mounting holes

74: Adjustment screw

75: Back panel

76: Mounting hole

81, 82: Install screws

83: Install the button screws

84: Bearing components

85: Gasket

86: Opening stop ring

Claims (7)

A door opening device, comprising: a mounting member, which is mounted on a device body of a business machine; a supporting member, which supports an door opening body, which is mounted on the mounting member through a hinge shaft and can rotate; and a sliding member, which is accommodated in the supporting member and can slide in the supporting member along with the opening operation of the door opening body, and allows an elastic member to act between a free end side of the supporting member and a cam member provided on the mounting member; wherein a lubricating oil groove is provided on the inner side of the supporting member and/or the outer side of the sliding member, and the lubricating oil for lubrication is accumulated in the lubricating oil groove. As described in claim 1, the sliding member is composed of a first sliding member and a second sliding member, the first sliding member is arranged on the free end side of the supporting member; the second sliding member is arranged on the cam member side. In the opening and closing device as described in claim 1, the lubricating oil groove is arranged in a direction perpendicular to the sliding direction of the sliding member. As described in claim 2, the opening device has a lifting member installed on the free end of the supporting member, and the lifting member supports the opening body through the hinge shaft. The first sliding member and the second sliding member arranged on the free end of the supporting member allow the elastic member to take effect between an actuating member and the cam member arranged on the lifting member. As described in claim 2, the first sliding member is provided with a discharge groove, which is located on the side of the first sliding member that contacts one of the upper plates of the supporting member and is arranged at a specific distance. As described in claim 2, the second sliding member is provided with a protrusion, which is located on the side of the second sliding member that contacts the upper plate of the supporting member. A transaction machine using the opening device as described in claim 1.