JP6507396B2 - Hinge - Google Patents

Description

  The present invention relates to a hinge for connecting an object to be connected to a first connection object to be openable and closable to a first connection object, such as, for example, an original press-clamping plate of the device to be openably connected.

  Conventionally, many office machines used in offices, such as copiers, facsimiles, scanners, etc., have an original reading unit (contact glass) on the upper surface of the main body and an original pressing plate covering the original reading unit. . The original cover is brought into close contact with the original reading unit with the original placed on the original reading unit and holds the position of the original relative to the original reading unit.

  The first wing member, the cam member fixed to the first wing member, and the first wing member can be rotatably connected via a pivot shaft as an instrument for connecting the main body of the office equipment and the original cover The second wing member, the slide member movable in the direction approaching the cam member and the direction away from the cam member, and the slide member to the cam member by urging the slide member in the direction approaching the cam member There is known a hinge having a biasing member to be abutted (see, for example, Patent Document 1).

  According to the hinge described in Patent Document 1, the first fixing pin holes are provided in both side plates of the mounting member, and the second fixing pin holes are formed at positions where the axial centers coincide with the first fixing pin holes in the both side plates of the support member. Is provided. Then, when the first fixing pin hole and the second fixing pin hole overlap each other in a state in which the original cover is closed, the fixing pin is inserted into the first fixing pin hole and the second fixing pin hole, and the supporting member Is configured to prevent the opening rotation of the mounting member with respect to the mounting member.

Unexamined-Japanese-Patent No. 2006-23325

  According to the hinge described in Patent Document 1, it is necessary to open the pin holes in both the attachment member and the support member, which causes an increase in processing cost.

  The present invention has been made in view of the above situation, and the problem to be solved by the present invention is that the first wing member and the second wing member rotate relative to each other in the opening direction with less processing cost. It is to provide a hinge that can be prevented.

  Below, the means for solving the said subject are demonstrated.

  That is, in claim 1, the first wing member fixed to the first connection object, the cam member formed by bending the plate-like member and fixed to the first wing member, and the second connection object A second wing member fixed to the first wing member and rotatably connected to the first wing member via a pivot shaft, and transitioning between the open state and the closed state with respect to the first wing member; A slide member which is accommodated in a second wing member and movable in a direction approaching the cam member and in a direction away from the cam member, and the slide by biasing the slide member in a direction approaching the cam member A biasing member for bringing a member into contact with the cam member, the cam member being a fixing portion fixed to the two first side plates supporting the pivot shaft in the first wing member; Previous A curved plate portion disposed between the fixed portions and bent around an axis parallel to the rotation axis such that the side of the slide member when the second wing member is in a closed state has a convex shape; And the second wing member includes two second side plates for supporting the pivot shaft, and a fixing hole passing through the second side plate is opened in each of the second side plates; When the wing member is closed with respect to the first wing member, a fixing pin is inserted inside the fixing hole and the curved plate portion of the cam member, whereby the second wing member is the first wing. The member is prevented from being open.

  The hinge according to the present invention is effective in that relative rotation in the direction in which the first wing member and the second wing member are opened can be prevented at low processing cost.

FIG. 1 is a right side view showing a multifunction peripheral equipped with a hinge according to a first embodiment of the present invention. The right view which shows the 60 degree open state of the hinge which concerns on 1st embodiment. The right side view showing the closed state of the hinge concerning a first embodiment. The front view which shows the closed state of the hinge which concerns on 1st embodiment. Sectional view on the AA line in FIG. Sectional drawing which shows the 60 degree open state of the hinge which concerns on 1st embodiment. Sectional drawing which shows the 90 degree open state of the hinge which concerns on 1st embodiment. The perspective view which shows a cam member. The figure which showed the plate-shaped member before forming a cam member.

Hereinafter, the multifunction device 1 as an embodiment of the office machine will be described with reference to FIG.
The multifunction machine 1 comprises a main body 2 and an original cover 3. In the present embodiment, the multifunction device 1 is configured to include the hinge 100 according to the first embodiment of the present invention, but the multifunction device 1 may be configured to include a hinge according to another embodiment described later. It is.

The main body 2 is an embodiment of the first connection object according to the present invention.
The main body 2 includes a document reading device, a control device, a printing device, a display device, and an input device.
The document reading device is disposed on the upper surface of the main body 2. The document reading apparatus reads a document placed on the upper surface of the main body 2 (generates image information of the document).
The control device controls the operation of each part of the multifunction device 1, more specifically, the operation of the document reading device, the printing device described later, and the ADF described later.
Further, the control device can store the image information generated by the document reading device and the image information acquired through a line (such as the Internet line) connected to the main body 2.
The printing device is disposed below the document reading device. The printing apparatus prints an image on a predetermined sheet based on the image information stored in the control device.
The display device is formed of, for example, a liquid crystal panel, and displays information related to the operation status of the multifunction device 1 and the like.
The input device includes, for example, a button, a switch, and the like, and is operated when the operator inputs an instruction or the like to the multifunction device 1. The display device and the input device are disposed on the upper front of the main body 2.

The original cover 3 is an embodiment of the second connection object according to the present invention.
By pressing (crimping) the original placed on the original reading device against the original reading device, the original pressing plate 3 moves the original when the original reading device reads the original (relative to the original reading device To prevent changes in
The original cover 3 has a document storage tray before reading, an ADF (Auto Document Feeder), and a document storage tray after reading.
The ADF takes out a plurality of originals stored in a stacked state in the original accommodation tray before reading one by one in order and places the original at a predetermined reading position on the original reading device. After the reading of the document by the document reading device is completed, the ADF reads the document placed at the reading position and conveys the document to the document storage tray.

"Office equipment" refers to a device having at least a function of reading a document (acquiring image information of the document).
Specific examples of office equipment include (a) a scanner having a function of reading an original and a function of transmitting image information related to the read original to another apparatus (for example, a personal computer); (b) a function of reading an original; (C) a function of reading an original, and a read original that has a function of transmitting image information relating to a read original to another apparatus via a communication line and a function of printing out image information acquired from the other apparatus And a copier having a function of printing out the image information according to the above (d) the above-mentioned scanner, fax, and a multifunction machine also having a function as a copier.

Although all the hinges according to the embodiments described in detail below are used for connecting the original cover 3 to the main body 2 of the multifunction machine 1 in an openable / closable (rotatable) manner, the application of the hinge according to the present invention is It is not limited to this.
That is, the hinge according to the present invention can be widely applied to “a use for connecting the other member (the second connection object) to one of the two members (the first connection object) so as to be able to open and close”. is there.
As a specific example of another application to which the hinge according to the present invention is applied, there is an application in which a hatch (lid) for replacing a toner cartridge is openably connected to a main body of office equipment, a bonnet can be opened and closed in a car body And the use to connect the toilet seat to the toilet bowl so as to be able to open and close.

  In the following description, when the original cover 3 is closed (when the lower surface of the original cover 3 is in contact with the upper surface of the main body 2), the rotation angle θ of the original cover 3 (more strictly, the main body The rotation angle θ) of the original cover 3 with respect to 2 is set to “0 °”, and when the original cover 3 is rotated in the opening direction, the rotation angle θ is increased (the rotation angle θ is positive). Of the original cover 3 is defined (see FIG. 1).

Below, hinge 100 which is one embodiment of a hinge concerning the present invention is explained using Drawings 1-9.
As shown in FIG. 1, the hinge 100 rotatably connects the original cover 3 to the main body 2 of the multifunction machine 1.
As shown in FIGS. 2 to 7, the hinge 100 includes a lower fixing member 110, an intermediate member 20, a first pivot pin 71, a pair of bearings 74, an upper fixing member 30, a second pivot pin 72, a pressure receiving pin 73, One slider 40, a second slider 50, a spring 60, a damper 62, and a cam member 160 are provided.
Hereinafter, for the sake of convenience, when the original cover 3 is closed with respect to the main body 2 (when the rotation angle θ = 0 °), the vertical direction, the front-rear direction, and the lateral direction of the multifunction device 1 are used as a reference Shape of each member of the hinge 100 corresponding to the vertical direction, the front-rear direction and the left-right direction of the multifunction device 1 in the vertical direction, the front-rear direction and the left-right direction of the hinge 100 when the Explain.

The lower fixing member 110 is an embodiment of the first wing member according to the present invention. The lower fixing member 110 is fixed to the main body 2 of the multifunction machine 1.
The lower fixing member 110 of the present embodiment is formed by appropriately bending one metal plate. The lower fixing member 110 includes a bottom plate 111, left and right side plates 112 and 112 which are first side plates, and a back plate 113.

  The bottom plate 111 is a plate-like member that forms the lower part of the lower fixing member 110. The bottom plate 111 has a pair of upper and lower plate surfaces. The shape of the bottom plate 111 is a generally rectangular shape slightly longer in the front-rear direction in plan view.

  The side plate 112 is a plate-like member that forms the left and right sides of the lower fixing member 110. The side plate 112 has a step-like shape that is generally downward in the side view. The lower end portion of the side plate 112 is connected to the end portion of the bottom plate 111 (the bottom plate 111 and the side plates 112 and 112 are formed by bending one metal plate at a right angle). A through hole for inserting the first pivot pin 71 is opened at the rear upper end of the side plate 112. The fixing hole 112 b is opened below the through hole. A cylindrical locking portion 112a for locking the cam member 160 is projected inward (to the side of the bottom plate 111) to the rear of the fixing hole 112b.

The back plate 113 is a plate-like member that forms the rear of the lower fixing member 110. The back plate 113 has a pair of front and rear plate surfaces. The shape of the back plate 113 is a generally rectangular shape slightly longer in the left-right direction in front view.
The lower end portion of the back plate 113 is connected to the rear end portion of the bottom plate 111 (the bottom plate 111 and the back plate 113 are formed by bending one metal plate at a right angle).
At the left and right ends of the back plate 113, protrusions (not shown) protruding laterally are formed, and the protrusions are inserted into the side plate 112, whereby the lower fixing member 110 forms a strong structure.

  The intermediate member 20 is a substantially cylindrical member formed of a top plate and two second side plates 21 and 21 by appropriately bending one metal plate. The intermediate member 20 is rotatably supported by the lower fixing member 110 via the first rotation pin 71 in a state in which the first slider 40, the second slider 50, the spring 60, the damper 62 and the like are accommodated as described later. . A through hole for inserting the first pivot pin 71 is opened in the left and right direction at the rear of the second side plates 21. Further, in the vicinity of the through holes, fixing holes 21a, 21a penetrating the second side plates 21, 21 are opened.

The first pivot pin 71 is an embodiment of "the pivot shaft of the second wing member relative to the first wing member (the pivot shaft pivotally connecting the second wing member to the first wing member)" according to the present invention It is one form and is a substantially cylindrical member.
The bearing 74 is a substantially ring-shaped (thin cylindrical shape) member, and rotatably supports the first pivot pin 71 in a through hole opened in the side plate 112 of the lower fixing member 110.

The first pivot pin 71 is inserted into the through hole formed in the second side plate 21 of the intermediate member 20 and the through hole of the bearing 74 fitted in the side plate 112 of the lower fixing member 110. In other words, the first pivot pin 71 is supported by the second side plates 21. The intermediate member 20 is pivotably connected to the lower fixing member 110 via the first pivot pin 71.
In addition, the E-ring (not shown) is fitted to both ends of the outer peripheral surface of the first pivot pin 71 so that the first pivot pin 71 does not drop out of the intermediate member 20 and the lower fixing member 110.

  The upper fixing member 30 is a substantially cylindrical member formed of a top plate and two side plates by appropriately bending one metal plate. The upper fixing member 30 is rotatably supported by the intermediate member 20 via a second rotation pin 72 as described later. Further, the upper fixing member 30 is fixed to the original cover 3. An adjusting screw 31 is screwed into the upper surface of the upper fixing member 30. By adjusting the screwing length of the adjusting screw 31, the position of the upper fixing member 30 relative to the intermediate member 20 can be adjusted.

  The second pivot pin 72 is a member that forms a pivot for pivotally connecting the upper fixing member 30 to the intermediate member 20. The second pivot pin 72 is a substantially cylindrical member having a pair of end surfaces and an outer peripheral surface, and is inserted into the front portion of the upper fixing member 30 and the intermediate member 20. As a result, the upper fixing member 30 is pivotably connected to the intermediate member 20 via the second pivot pin 72. In addition, the E-ring (not shown) is fitted in ring-shaped grooves formed at both ends of the outer peripheral surface of the second pivot pin 72, whereby the second pivot pin 72 is fixed to the upper fixing member 30 and the intermediate member. Do not drop out of 20

  The pressure receiving pin 73 is a substantially cylindrical member having a pair of end surfaces and an outer peripheral surface, and both end portions (portions near the pair of end surfaces) of the outer peripheral surface of the pressure receiving pin 73 extend in the circumferential direction of the pressure receiving pin 73 Ring-shaped grooves are formed. The pressure receiving pin 73 is pivotally supported by the upper fixing member 30 by mounting the pressure receiving pin 73 in the upper fixing member 30. The pressure receiving pin 73 does not come off from the upper fixing member 30 by fitting an E ring (not shown) in ring-shaped grooves formed on both ends of the outer peripheral surface of the pressure receiving pin 73.

The first slider 40 is an embodiment of the slide member according to the present invention. The first slider 40 of the present embodiment is made of a resin material.
The first slider 40 includes a cam contact surface 41 which is formed to project rearward at the lower half of the rear surface, and a pivot pin support surface 42 formed on the upper half of the rear surface. The first slider 40 has a spring receiving hole for receiving the rear end of the spring 60. On the bottom surface of the spring receiving hole, a pressing projection 43 for pressing the tip end portion 62 a of the damper 62 is formed so as to protrude toward the second pivot pin 72 side. The first slider 40 is slidably accommodated at the rear of the inside of the intermediate member 20 in the front-rear direction.

The second slider 50 is a member provided with the cover 51. The second slider 50 of the present embodiment is made of a resin material. The cover portion 51 prevents the grease from hanging down from the first slider 40 or the second slider 50.
The second slider 50 has a spring receiving hole for receiving the rear end of the spring 60. The cover portion 51 is a plate-like portion, and the front end portion of the cover portion 51 is connected to a portion to be the rear end portion and the lower end portion of the second slider 50. The second slider 50 is slidably accommodated at the front of the inside of the intermediate member 20 in the front-rear direction.

  In the present embodiment, “the combination of the intermediate member 20, the upper fixed member 30, the second slider 50, the second pivot pin 72, and the pressure receiving pin 73” is an embodiment of the second wing member according to the present invention. Equivalent to. In other words, one embodiment of the second wing member according to the present invention includes the intermediate member 20, the upper fixing member 30, the second slider 50, the second pivot pin 72, and the pressure receiving pin 73. Then, the upper fixing member 30 is fixed to the original cover 3 to fix the second wing member to the second connection object.

  In the present embodiment, the second wing member is in the close state where the second wing member is closest to the first wing member (the closed state of the original cover 3 with respect to the main body 2 (rotational angle θ = 0 °) and the second wing member is most separated from the first wing member in the “open state” of the second wing member (the original cover 3 is open relative to the main body 2 (rotational angle) Let θ = 90 °)).

  The spring 60 is a metal wound spring (compression spring), which is an embodiment of the biasing member according to the present invention. The spring 60 is housed inside the intermediate member 20.

  The rear end of the spring 60 is inserted into a spring receiving hole formed in the first slider 40 and abuts on the bottom of the spring receiving hole. The front end of the spring 60 is inserted into a spring receiving hole formed in the second slider 50 and abuts on the bottom of the spring receiving hole.

  The biasing force generated by the spring 60, that is, the force (elastic force) that causes the spring 60 elastically deformed in the direction to be compressed to return to the original shape (the shape when no external force is applied). The second slider 50 is biased in the direction of approaching the pressure receiving pin 73 in the longitudinal direction of the intermediate member 20 in the longitudinal direction of the intermediate member 20 and in the direction of approaching the first pivot pin 71.

  A damper 62 is accommodated in a spring receiving hole formed in the second slider 50. The damper 62 is disposed such that its tip 62 a protrudes toward the first pivot pin 71. The damper 62 generates a reaction force when the distal end portion 62 a receives a pressing force by the pressing projection 43 formed in the spring receiving hole of the first slider 40. For this reason, the speed at which the first slider 40 moves by the reaction force is reduced, and a buffer effect by the damper 62 is generated. The damper 62 is a general fluid damper, and the main body of the damper 62 is fixed at a predetermined position in the second slider 50.

The cam member 160 is an embodiment of the cam member according to the present invention.
The cam member 160 is a member formed by bending the metal plate member 16 as shown in FIGS. 8 and 9, and is fixed to the lower fixing member 110. The cam member 160 includes plate-shaped upper fixing portions 161 and 161 and plate-shaped lower fixing portions 162 and 162 as fixing portions. And it comprises and comprises the curved plate part 163 arrange | positioned between each upper side fixing | fixed part 161 * 161 and lower side fixing | fixed part 162 * 162.

  When the cam member 160 is formed, as shown in FIG. 9, the plate-like member 16 is cut out so that the upper fixing portions 161 and 161 and the lower fixing portions 162 and 162 are formed at the four corners of the rectangular shape. Then, the upper fixing portions 161 and 161 and the lower fixing portions 162 and 162 are bent 90 degrees toward the same side of the plate member 16, and the central portion of the rectangular shape (dotted line hatched portion in FIG. 9) is bent 180 degrees By forming the portion 163, the cam member 160 is formed as shown in FIG.

  The upper fixing portions 161 and 161 and the lower fixing portions 162 and 162 are fixed by being detachably locked to the side plates 112 and 112 supporting the first pivot pin 71 in the lower fixing member 110. Specifically, first locking portions 161a and 161a whose inner peripheral portions are formed in a substantially semicircular shape are formed in the upper fixed portions 161 and 161, respectively. As shown in FIGS. 5 to 7, the inner circumferential shape of the first locking portions 161 a and 161 a is formed to have substantially the same diameter as the outer circumferential shape of the first pivot pin 71. Then, by locking the first locking portions 161a and 161a to the first pivot pin 71, the upper fixing portions 161 and 161 are fixed to the side plates 112 and 112.

  In each lower fixing portion 162, 162, a second locking portion 162a, 162a is formed whose inner peripheral portion is semicircular and smaller in diameter than the upper fixing portion 161, 161. As shown in FIGS. 5 to 7, the inner peripheral shape of the second locking portions 162a and 162a is formed to have substantially the same diameter as the outer peripheral shape of the locking portion 112a protruding from the side plate 112. The lower fixing portions 162 and 162 are fixed to the side plates 112 and 112 by locking the second locking portions 162 a and 162 a to the locking portions 112 a.

  In the present embodiment, the upper fixed portions 161 and 161 and the lower fixed portions 162 and 162 are fixed to the side plates 112 and 112 by locking them to the first pivot pin 71 and the locking portion 112a. However, the fixing method of each fixing part is not limited to this. For example, the fixing holes are opened in the upper fixing portions 161 and 161 and / or the lower fixing portions 162 and 162, and the fixing plate is inserted by inserting the fixing pins through the holes opened in the side plates 112 and 112 and the fixing holes. Configuration is also possible.

  As described above, the first locking portions 161a and 161a and the second locking portions 162a and 162a are each formed in a substantially semicircular shape. Since the first locking portions 161a and 161a and the second locking portions 162a and 162a are locked to the first pivot pin 71 and the locking portion 112a, the cam member 160 is fixed to the lower fixing member 110. It can be easily attached and detached.

  In the present embodiment, in the state where the cam member 160 is attached to the lower fixing member 110, the fixing hole 162b is opened so as to be at the same position as the fixing hole 112b of the side plate 112 in the lower fixing portion 162. The cam member 160 can be firmly fixed to the lower fixing member 110 by inserting a fixing tool such as a bolt (not shown) into the fixing hole 112 b and the fixing hole 162 b and fastening them with a nut or the like.

  When the cam member 160 is attached to the lower fixing member 110, as shown in FIGS. 5 to 7, the curved plate portion 163 is directed forward (toward the second pivot pin 72 in this embodiment). It is arranged. In other words, the curved plate portion 163 is bent around an axis parallel to the first pivot pin 71 so that the side of the first slider 40 member when the second wing member is in the closed state has a convex shape. It is

  In the present embodiment, as shown in FIG. 5, the inner peripheral surface 163 a of the curved plate portion 163 is formed on the front side of the front side 112 c of the side plate 112. Further, as shown in FIG. 3, the position of the inner circumferential surface 163a is configured to coincide with the fixing hole 21a in the second side plate 21 when the second wing member is in the closed state. For this reason, as shown in FIGS. 3 to 5, the second space S (see FIGS. 2, 6 and 7) formed between the inner circumferential surface 163a and the front side 112c When the wing member is in the closed state, the fixing pin 81 can be inserted from the fixing hole 21a.

  When the cam member 160 is attached to the lower fixing member 110 and the second wing member is in the closed state, the cam contact surface 41 of the first slider 40 abuts on the curved plate portion 163 of the cam member 160 and the second The slider 50 abuts on the outer peripheral surface of the pressure receiving pin 73.

  As a result, due to the elastic force generated in the spring 60, the intermediate member 20 (therefore, one embodiment of the second wing member according to the present invention) opens in a direction (right side view in this embodiment) with respect to the lower fixing member 110. And the upper fixing member 30 is turned in the closing direction with respect to the intermediate member 20 (in the present embodiment, in the counterclockwise direction in the right side view). It is energized to move. At this time, the tip 62a of the damper 62 is pressed by the pressing projection 43 of the first slider 40 and pushed into the main body.

In the present embodiment, when the rotation angle θ of the original cover 3 with respect to the main body 2 of the multifunction device 1 is in the range of 0 ° to φ ° (when 0 ° ≦ θ ≦ φ °), the upper fixing member 30 is Rotational force to close the hinge 100 due to the weight of the fixed original cover 3 (rotational force to rotate the intermediate member 20 clockwise with respect to the lower fixing member 110 in a right side view) And rotational force to open the hinge 100 due to the biasing force of the spring 60 (rotational force to rotate the intermediate member 20 counterclockwise with respect to the lower fixing member 110 in a right side view) The shape and the like of the cam contact surface 41 of the first slider 40 are previously determined such that.
By configuring in this manner, when the operator releases his / her hand from the original cover 3 in the range from 0 ° to φ °, the rotation angle θ of the original cover 3 with respect to the main body 2 of the multifunction device 1 is The rotation angle θ is maintained.

Further, in the present embodiment, when the rotation angle θ of the original cover 3 with respect to the main body 2 of the multifunction device 1 is in the range from φ ° to 90 ° (when φ ° <θ ≦ 90 °), the first slider The pivot pin support surface 42 of the fork 40 abuts on the outer peripheral surface of the first pivot pin 71, and movement of the first slider 40 in the direction approaching the cam member 160 is restricted. The contact surface 41 is separated from the curved plate portion 163 of the cam member 160.
Since the cross-sectional shape in a plane perpendicular to the axial direction of the first pivot pin 71 of the present embodiment is circular, the pivot angle θ of the original cover 3 with respect to the main body 2 of the multifunction device 1 is from φ ° to 90 °. Even if the range changes, the position of the first slider 40 with respect to the intermediate member 20 and thus the entire length of the spring 60 (the spring 60 is generated (insofar as the rotational angle of the upper fixing member 30 relative to the intermediate member 20 does not change) Does not change.

Accordingly, when the rotation angle θ of the original cover 3 with respect to the main body 2 of the multifunction device 1 is in the range from φ ° to 90 ° (strictly, the rotation of the first slider 40 is caused by the biasing force of the spring 60). Although the frictional force acts on the contact portion between the dynamic pin support surface 42 and the outer peripheral surface of the first pivot pin 71, substantially the biasing force of the spring 60 is applied to the cam member 160 via the first slider 40. The rotational force that causes the hinge 100 to open due to the biasing force of the spring 60 (the intermediate member 20 rotates counterclockwise in a right side view with respect to the lower fixing member 110). Force) does not act on the hinge 100.
Note that the value of φ may fluctuate somewhat as a result of adjustment of the biasing force of the spring 60 by the cam member 160 described later.

  According to the hinge 100 according to the present embodiment, as shown in FIG. 3 to FIG. 5 and FIG. 8, when the second wing member is closed to the first wing member, the fixing holes of the second side plates 21 and 21 The fixing pin 81 is inserted into the inside (the space S formed between the inner peripheral surface 163a of the curved plate portion 163 and the front side 112c of the side plate 112) of the curved plate portion 163 of the cam 21a. Thereby, the second wing member can be prevented from being open with respect to the first wing member in the closed state.

  As described above, according to the hinge 100 according to the present embodiment, the fixing pin 81 is fixed by the cam member 160 disposed on the lower fixing member 110 which is the first wing member. In detail, by inserting the fixing pin 81 inside the curved plate portion 163 of the cam member 160, the movement of the fixing pin 81 is restricted. As a result, it is not necessary to open the hole in the lower fixing member 110, so that the processing cost can be suppressed. That is, the hinge 100 can prevent relative rotation in the direction in which the first wing member and the second wing member are opened at a low processing cost.

20 Intermediate member (part of second wing member)
21 second side plate 21a fixing hole 30 upper fixing member (part of second wing member)
40 First slider (slide member)
50 Second slider (part of second wing member)
60 spring (biasing member)
71 First rotation pin (rotation axis)
81 Fixing pin 110 Lower fixing member (first wing member)
160 cam member 161 upper fixed part (part of fixed part)
162 Lower fixed part (part of fixed part)
163 Curved section

Claims (1)

A first wing member fixed to the first connection object;
A cam member formed by bending a plate-like member and fixed to the first wing member;
A second object which is fixed to the second connection object and rotatably connected to the first wing member via a pivot shaft, and which makes transition between the open state and the closed state with respect to the first wing member With wing members,
A slide member accommodated in the second wing member and movable in a direction approaching the cam member and in a direction away from the cam member;
And a biasing member that brings the slide member into contact with the cam member by biasing the slide member in a direction toward the cam member.
The cam member is disposed between a fixed portion fixed to two first side plates supporting the pivot shaft in the first wing member and the fixed portion, and the second wing member is in a closed state. And a curved plate portion bent around an axis parallel to the rotation axis such that the side of the slide member at the time of
The second wing member includes two second side plates for supporting the pivot shaft, and a fixing hole passing through the second side plate is opened in each of the second side plates,
When the second wing member is in a closed state with respect to the first wing member, a fixing pin is inserted into the inside of the fixing hole and the curved plate portion of the cam member, thereby the second wing member A hinge that is prevented from opening relative to the first wing member.

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