JP4154528B2 - Hinge device - Google Patents

Description

  The present invention relates to a hinge device, and more particularly to a hinge device that foldably couples two members and allows the two members to be locked in an extended state.

As a hinge device that couples two members in a foldable manner and enables locking of the two members in an extended state, Patent Document 1 discloses a first hinge member and a folded state parallel to the first member. And a second hinge member that can rotate to an extended state that is relatively rotated by approximately 180 ° from this state, a connecting shaft that rotatably connects the two hinge members, and the hinge members that are not rotatable. And an urging member for urging the operation lever in the lock position direction. The operation lever includes a main body portion, a lock member, and a lock member. What has an engagement part at the time of locking which engages with any one of the 1st hinge member and the 2nd hinge member in a position, and a lock release operation part for moving an operation lever in a lock release direction is indicated Has been In the folding operation, the operating lever is moved in the unlocking direction, and one hinge member is rotated with respect to the other hinge member while maintaining the state.
Japanese Utility Model Publication No. 5-50079

  The hinge device is useful for allowing the work platform and the scaffold to be folded safely so that they can be used safely in the extended state and facilitated storage. There is a problem that folding operation is difficult because it is necessary to hold it by pressing.

  It is an object of the present invention to provide a hinge device that does not require the operation lever to be held by hand at the unlocked position when folding, and therefore can be easily folded.

  The hinge device according to the present invention includes a first hinge member, a second hinge member that is rotatable in a folded state parallel to the first member and an extended state that is relatively rotated by about 180 ° from this state, A connecting shaft that rotatably connects the hinge members, an operating lever that is movable to a locked position where the hinge members are not rotatable, and an unlocked position that is rotatable; A biasing member that biases in the lock position direction, and the operation lever includes a main body portion, an engagement portion at the time of locking that engages either the first hinge member or the second hinge member at the lock position, and an operation lever. In the hinge device having the unlocking operation unit for moving the lever in the unlocking direction, the operating lever is engaged with one of the first hinge member and the second hinge member at the unlocking position. And it is characterized in that it has a lock cancellation engagement portion for preventing movement of the locking positional direction of the operating lever further.

  Each hinge member includes, for example, a coupling portion fixed to a member that is folded / expanded, a projecting portion that includes an opposing wall and a connecting wall, and that projects in a length direction from the member that is folded / stretched in series with the coupling portion. The overlapping portion is provided at the front end portion of the opposing wall of the portion and overlapped with the overlapping portion of the other hinge member and connected by a connecting shaft. The space between the opposing walls of each hinge member is an operating lever storage portion, and the through wall through which the engaging portion is inserted is provided in the connecting wall of the projection portion of one hinge member, and the projection portion of the other hinge member The connecting wall is provided with a through-hole through which the unlocking operation portion of the operation lever and the unlocking engagement portion are inserted.

  The first hinge member, the second hinge member, and the operation lever are connected by a single connecting shaft, and each of them can be rotated around the connecting shaft.

  In order to change the hinge device from the extended state to the folded state, the operation lever is operated to engage the engaging portion with the hinge member at the time of unlocking to prevent the operation lever from moving in the lock position direction. Then, the hinge member is relatively rotated.

  It is preferable that the operation lever further includes a lock operation portion that is provided in the main body portion and moves the operation lever at the lock release position in the lock position direction. For example, the engagement between the operation lever unlocking engagement portion and the hinge member is maintained by the urging member urging the operation lever, and the operation of the lock operation portion is performed in the urging direction. On the other hand, it is performed by rotating in a direction orthogonal to this. In this way, when the unlocking engagement portion of the operation lever is engaged with the hinge member to be in the unlocked state, it becomes easy to operate the lock operating portion when it is necessary to return to the locked state. Can be returned to the locked state.

  The operation lever is formed with a lock release prevention engagement portion that contacts either one of the first hinge member or the second hinge member in the folded state and prevents the operation lever from moving in the direction of the lock release position. Is preferred. In this way, the operation lever can be moved in the unlocked position direction only in the extended state and not in the folded state, and erroneous operation can be prevented.

  Furthermore, the lock operation portion is provided with a lock position return engagement portion that abuts against either the first hinge member or the second hinge member when the first hinge member or the second hinge member is folded. It is preferable that it is rotated together with this by further rotating operation to be returned to the locked state. If it does in this way, an operation lever will be moved from a lock release position to a lock position by folding operation, and it can prevent erroneous operation certainly.

  Further, the main body of the operation lever has a portion that is covered with the hinge member at the lock position and exposed from the hinge member at the lock release position, and a releasing display portion that displays the unlocked state is provided in this portion. It is preferable. If it does in this way, it can recognize easily that an operator is in a lock release state, and safety improves.

  Furthermore, it is preferable that a rib contacting the hinge portion is provided on a side surface of the main body portion of the operation lever. In this way, dust and dust are less likely to accumulate inside the hinge device and are easily removed, and the area of the friction surface is reduced, so that it is possible to prevent the rotation operation from being difficult due to the large friction.

  According to the hinge device of the present invention, the operation lever has the unlocking engagement portion that engages with either the first hinge member or the second hinge member at the unlocking position. By engaging the engaging part with either one of the first hinge member and the second hinge member when unlocking the operation lever, the unlocked state is maintained, and it can be folded without holding the operation lever by hand. The folding operation can be performed easily.

  Embodiments of the present invention will be described below with reference to the drawings.

  In this specification, for the front and rear, the right in FIG. 2 is the front, the left is the rear, and the left and right are the front. Further, regarding the upper and lower sides of the work table, the work state shown in FIG.

  The workbench can be folded in two in a reverse V-shape, with a pair of front and rear legs (1) and (2) consisting of a multi-step trawl (4) secured between the left and right struts (3) and struts (3) A top plate (5), front and rear top plate receiving bars (6) that are provided at the upper ends of the legs (1) and (2) and receive the front and rear ends of the top plate (5), and left and right support columns (3) A connecting bracket (7) for connecting the upper end portion and the front and rear end portions of the top plate (5) to each other so as to be rotatable, and between the step rail (4) and the rear top plate receiving rail (6) of the front leg (1) and The diagonal member (8) passed diagonally between the step (4) of the rear leg (2) and the front top plate receiving frame (6), the top plate receiving frame (6) and a predetermined (in this example) It is provided with storage brackets (9) which are respectively provided on the bottom rails (4) and engage with each other in the folded state, and can be folded from the use state shown in FIG. 2 to the storage state shown in FIG. It is made like that.

  The front and rear legs (1) and (2) are slightly extended downward, and the angle formed between each support column (3) and the ground is about 83 °.

  The top plate (5) consists of a pair of front and rear scaffold plates (11) and (12), a connecting side end (rear end portion) of the front scaffolding plate (11), and a connecting side end portion (front end) of the rear scaffold plate (12). Fixed brackets (13) and (14), movable brackets (not shown) that connect the fixed brackets (13) and (14) so that they can rotate relative to each other, and the front scaffolding plate (11) The front and rear cover parts (16) fixed to the front end part of the rear and the rear end part of the rear scaffolding plate (12), and the left and right parts attached to the fixing brackets (13) and (14) to cover the left and right ends of the movable bracket And a cover portion (17).

  The top plate receiving bar (6) is made of an aluminum extrusion mold, has a substantially rectangular cross section, and is secured between the left and right support columns (3) in the same manner as the step bar (4). On the top wall of the top plate receiving bar (6), an arcuate upper surface having a concave cross section for guiding the front and rear ends of the top plate (5) when folded is formed.

  Each oblique member (8) is composed of a long portion (21) and a short portion (22) connected in a V-shape so as to be folded in two. The intermediate portions of the long portions (21) of both the oblique members (8) are connected to each other by a connecting pin (23) so as to be X-shaped and rotatable relative to each other. The long part (21) and the short part (22) are connected to each other by the hinge device (24) (25) that folds and extends the parts (21) and (22). The upper edge portion of the abutting surface with (22) is connected in a V-shaped manner so that it can be folded in half with the rotation center.

  A lower support bracket (19) that rotatably supports the lower end portion of the short portion (22) of each diagonal member (8) is attached to the center of the third stepped rail from the bottom. At the corresponding position of (6), an upper support fitting (20) is rotatably attached that rotatably supports the upper end portion of the long portion (21) of each oblique member (8).

  When the work table is in use, the front scaffolding plate (11) and the rear scaffolding plate (12) of the top plate (5) are in contact with each other, and the long part (21) and the short part (22) of the oblique member (8). Are matched. The top plate (5) can be folded in an inverted V shape with the lower edge of the abutment surface between the front scaffold plate (11) and the rear scaffold plate (12) as the center of rotation. Folding is impossible, and the load applied to the top plate (5) is firmly received by the top plate (5), the front and rear legs (1) and (2), and the diagonal member (8). The force that the front and rear legs (1) and (2) try to spread acts in the direction of folding the diagonal member (8) in an inverted V shape, so that the diagonal member (8) ) (2) serves to prevent the two from opening each other.

  This workbench is folded as follows. In the following description, A and C are the connection center between the upper end of the diagonal member (8) and the top plate receiving bar (6), and B and D are the lower end of the diagonal member (8) and the step bar (4 ) And E and F respectively indicate the connection centers of the long portion (21) and the short portion (22) of the oblique member.

  First, start folding the top plate (5) into an inverted V shape. Each diagonal member (8) can be folded in two in a V shape with the upper edge of the abutting surface of the long portion (21) and the short portion (22) as the center of rotation. It will be folded. At this time, the front and rear legs (1) and (2) first move in the direction in which they spread. That is, with reference to the connection center (the axis of the connection pin (23)) between the long portions (21) of the oblique member (8), A and C approach each other and move upward, and B and D are Move away and upward, E and F move closer together and move downward. When the top plate (5) is further folded, the front and rear legs (1) and (2) approach each other, and finally, as shown in FIG. 3, the short part (22) is the long part (21). The short part (22) is housed in a position parallel to the column (3) below the third step rail from the bottom, and the long part (21) is the lower end part thereof. Overlaps the short portion (22), and the long portions (21) of the two oblique members (8) are overlapped on the left and right and are stored between the front and rear legs (1) and (2).

  In the above, as shown in FIG. 3, as a condition for compact folding, the distance from the upper end rotation centers A and C of the diagonal members (8) to the connection center F and E (of the line segment AF and the line segment AE). The length (corresponding to the length of the long part (21)) and the distance (line segment DF) from the rotation center D and B of the lower end part of each oblique member (8) to the connection part centers F and E And the length of the line segment BE, which corresponds to the length of the short portion (22)), the difference between the upper end rotation centers A and C of the one oblique member (8) and the other oblique member The distance to the lower end rotation centers B and D of (8) (the length of the line segment AB and line segment CD, which corresponds to the length along the column (3) of the entire diagonal member (8). ) And are substantially equal. That is, line segment AB = line segment CD≈line segment CE−line segment BE = line segment AF−line segment DF. Here, the point A and the point B are located near the center plane of symmetry in the folded state, the point E and the point F are respectively located on the rear surface of the front strut and the front surface of the rear strut slightly outside, and , B and E are positioned so as to overlap with the outer support columns.

  By ensuring such a condition, the lower end rotation center of each slanting member moves in a direction away from each other in the initial folding stage, and the entire folding work table unless the top plate is folded in half. Is not folded and locked in use. Therefore, for example, even when the working table is in use and is transported with a support, the working table is not inadvertently closed by its own weight.

  One of the hinge devices (24) and (25) that foldably connect the long part (21) and the short part (22) in a foldable / extensible manner (24) is to improve safety during work. The unlocking state is maintained even if the operation lever is not held down by hand in order to enable the locking of the both parts (21) and (22) in the extended state and to facilitate the folding work. ing.

  The hinge device (24) will be described with reference to FIGS. In the following description, it is assumed that the members (21) and (22) to be joined by the hinge device (24) are placed horizontally, and in front and rear, the right in FIG. 5 is the front and the left is the rear. As for the top and bottom, the top and bottom in FIG. This positional relationship is convenient and can be used upside down, and can be used up and down or diagonally.

  The hinge device (24) includes a first hinge member (31), a folded state parallel to the first member (31), and an extension rotated about 180 ° relative to the first member (31) from this state. The second hinge member (32) that can rotate to the state, the connecting shaft (33) that rotatably connects the hinge members (31) and (32), and the hinge members (31) and (32) can rotate. An operation lever (34) movable between a lock position where movement is impossible and a lock release position where rotation is possible, and a compression coil as a biasing member which urges the operation lever (34) toward the lock position And a spring (35).

  The first hinge member (31) includes a coupling portion (41) fixed to one of the coupled members (long portion) (21) by a rivet or the like, a left and right opposing wall (42a), and a lower connecting wall (42b). A projecting part (42) projecting rearward (in the length direction) from the long part (21) to the connecting part (41), and a rear end part (42a) of the left and right opposing walls (42a) of the projecting part (42) And an overlapping portion (43) that is provided at the tip portion and overlaps the overlapping portion (46) of the second hinge member (32).

  The second hinge member (32) includes a coupling portion (46) fixed by a rivet or the like to the other (short portion) (22) of the member to be coupled, the left and right opposing walls (47a), and the lower connecting wall (47b). The projecting part (47) projecting forward (in the length direction) from the short part (22) to the connecting part (46) and the front end part (front end part) of the opposing wall (47a) of the projecting part (47) And an overlapping portion (48) that is provided and overlaps the overlapping portion (43) of the first hinge member (31).

  The first hinge member (31) and the second hinge member (32) have their protruding portions (42) and (47) abutted with each other, and the overlapping portions (43) and (48) are overlapped with each other. The cylindrical connecting shaft (33) is inserted into the through holes (43a) and (48a) provided in the overlapping portions (43) and (48) so as to be pivotably connected to each other. The centers of the through holes (43a) and (48a), that is, the axis of the connecting shaft (33) are positioned above the upper edges of the first hinge member (31) and the second hinge member (32).

  The operation lever (34) protrudes downward from the plate-shaped main body (51) in which the spring accommodating part (56) for accommodating the compression coil spring (35) is provided in a penetrating manner and the rear part of the main body (51). And a locking engagement portion (52) that engages with the second hinge member (32) in the locking position, and a control lever (34) that protrudes downward from the front of the main body (51). An unlocking operation portion (53) that moves in the unlocking direction (upward), and an operating lever (34) that is provided at the front portion of the main body (51) and engages with the first hinge member (31) at the unlocking position. ) Locks the unlocking engagement part (54) that prevents the lock from moving backward in the lock position direction (downward), and the operation lever (34) in the unlocking position provided on the upper part of the body part (51). It comprises a lock operation section (55) that moves in the position direction (clockwise).

  The space between the opposing walls (42a) and (47a) of the protrusions (42) and (47) of both hinge members (31) and (32) is an operation lever storage portion, and the operation lever (34) is connected to both hinge members (31) ( 32) The intermediate portion of the connecting shaft (33) that connects the two shafts is rotatably inserted into the shaft insertion portion at the upper end of the spring storage portion (56), so that the opposing walls of the hinge members (31) (32) (42a) held between (47a). The connecting shaft (33) is movable in the spring accommodating portion (56) extending slightly inclined with respect to the vertical direction against the compression coil spring (35), and the hinge members (31) (32) And can be moved in the direction of the spring accommodating portion (56).

  The lower connecting wall (42b) of the first hinge member (31) is provided with a through hole (44) through which the unlocking operation portion (53) of the operation lever (34) is inserted so as to be movable up and down. The rear end of the lower connecting wall (42b) protrudes downward from the other parts, and this part (45) is a stopper that receives the operating lever (34) biased by the compression coil spring (35). It is considered to be a part.

  The lower connecting wall (47b) of the second hinge member (32) is provided with a through hole (49) through which the engaging portion (52) at the time of locking of the operation lever (34) is inserted so as to be movable up and down. ing. The rear end of the lower connecting wall (47b) protrudes downward from the other parts, and this part (50) is locked when the operating lever (34) is urged by the compression coil spring (35). The stopper portion receives the engaging portion (52).

  In the locked state shown in FIG. 5, the second hinge member (32) is rotated counterclockwise (inverted V-shaped fold) with respect to the first hinge member (31). ) Are prevented from being brought into contact with each other, and the second hinge member (32) is rotated clockwise with respect to the first hinge member (31) (V-shaped two). Folding), the unlocking operation part (53) of the operating lever (34) can be moved up and down in the through hole (44) of the lower connecting wall (42b) of the first hinge member (31), but it moves in the front-rear direction. In addition, the engaging portion (52) of the operating lever (34) is blocked by contacting the stopper portion (50) of the lower connecting wall (47b) of the second hinge member (32). ing. The compression coil spring (35) biases the operation lever (34) in a direction in which the engaging portion (52) at the time of locking comes into contact with the stopper portion (50).

  The unlocking operation part (53) is protruded further downward than the locking engagement part (52) whose lower end is substantially flush with the stopper part (45) of the first hinge member (31). When the locking engagement portion (52) is pushed upward, the unlocking operation portion (53) is inserted into the through hole (44) of the lower connection wall (42b) of the first hinge member (31). In this state, the engagement between the locking engagement portion (52) and the stopper portion (50) is released.

  The unlocking engagement portion (54) is formed by cutting out the front portion of the unlocking operation portion (53) so that the base portion remains. A guide portion (59) for guiding the front surface of the base portion when the lock release operation portion (53) is pushed up is formed at the peripheral portion of the through hole (44) of the first hinge member (31). The compression coil spring (35) urges the operation lever (34) not to be straight downward but to be slightly rearward. For this reason, the force which pushes this from the connection wall (42b) of the 1st hinge member (31) to the operation lever (34) straight ahead rather than the upper part acts. Therefore, if the lock release operation part (53) is pushed up against the urging force of the compression coil spring (35) after the engagement between the locking engagement part (52) and the stopper part (50) is disengaged, the lock The front surface of the base of the release operation part (53) is disengaged from the guide part (59), and the operation lever (34) is moved slightly forward by the reaction force against the urging force of the compression coil spring (35), as shown in FIG. As described above, the unlocking engagement portion (54) biased downward by the biasing force of the compression coil spring (35) and the guide portion (59) of the first hinge member (31) are engaged. At this time, the connecting shaft (33) moves downward with respect to the hinge members (31) and (32) along the spring accommodating portion (56), and the compression coil spring (35) is compressed and unlocked. The elastic force that presses the engaging portion (54) against the guide portion (59) of the first hinge member (31) is large. In this way, the operation lever (34) in the unlocked state is prevented from returning in the lock position direction (downward).

  The lock operating part (55) is for releasing the engagement between the engaging part (54) at the time of unlocking and the guide part (59) of the first hinge member (31). In the holding state, the operation lever (34) is returned to the lock position by rotating the lock operation portion (55) clockwise. The lock operation part (55) also serves as a guide part for rotating the second hinge member (32), and the outer peripheral surface thereof has an arc shape.

  The lock operation portion (55) includes a lock release prevention engagement portion (55a) that engages with the second hinge member (32) in a folded state and prevents the operation lever (34) from moving upward (in the unlock position). ), And when the second hinge member (32) is folded, the operation lever (34) is in the unlocked position by abutting the member (32) and further rotating the member (32). ) Is forcibly returned to the lock position. A lock position return engagement portion (55b) is provided. The lock operation part (55) is also provided with a non-slip part (55c) when it is held by hand so that it is easy to forcefully return the operation lever (34) in the unlock position to the lock position. It has been.

  In FIG. 7, when the second hinge member (32), and thus the short part (22), is rotated clockwise, the second hinge member (32) is locked at the position indicated by the two-dot chain line. (55) abuts against the lock release preventing engagement portion (55a). When the second hinge member (32) is further rotated clockwise from this state, the operation lever (34) is forcibly rotated clockwise integrally with the second hinge member (32). As a result, the engagement between the unlocking engagement portion (54) and the guide portion (59) of the first hinge member (31) is released, and the operation lever (34) is moved to the lock position. When the second hinge member (32) is further rotated clockwise, the sliding portion (58) formed on the second hinge member (32) is guided to the outer peripheral surface of the lock operation portion (55). The second hinge member (32) is smoothly rotated and the hinge members (31) and (32) are parallel to each other with the operation lever (34) being returned to the locked state as shown in FIG. It is folded to become.

  In the folded state of FIG. 8, the lock release preventing engagement portion (55a) of the lock operation portion (55) is brought into contact with the sliding portion (58) of the second hinge member (32) from below. The operation lever (34) is prevented from moving upward (in the unlocking position direction), and the lock is not released. Then, when the second hinge member (32) is rotated counterclockwise from the state of FIG. 8, the sliding portion (58) of the second hinge member (32) is guided to the outer peripheral surface of the lock operation portion (55). As a result, the second hinge member (32) is rotated without resistance until the stopper portion (50) contacts the engaging portion (52) when the operating lever (34) is locked in the counterclockwise direction. It is done. After the stopper portion (50) of the second hinge member (32) contacts the engaging portion (52) when the operating lever (34) is locked, the second hinge member (32) is further rotated counterclockwise. The stopper portion (50) forcibly pushes up the engaging portion (52) when locked against the urging force of the compression coil spring (35), and moves the stopper portion (45) to the stopper portion (45) of the first hinge member (31). Stops at the point of contact. Thereafter, the operating lever (34) is pushed down by the urging force of the compression coil spring (35), and the use state (extended state) shown in FIG. 5 is obtained. Thus, folding can be performed safely and easily.

  As can be seen from FIG. 6, the peripheral edge portion (56a) of the spring accommodating portion (56) of the operating lever (34), the lower end portion (51a) of the main body portion (51), and the like are other than the other portions of the operating lever (34). These rib portions (51a) (56a) are guided to the inner surfaces of the opposing walls (42a) (47a) of the hinge members (31) (32), and the remaining ribs (51a) (56a) The part is made not to contact the inner surface of the opposing walls (42a) (47a). Therefore, the structure is such that dust and dust are less likely to accumulate inside the hinge device (24) and are easily removed. Further, since the area of the friction surface is reduced, it is difficult to hinder the movement.

  Further, as can be seen from FIGS. 7 and 8, the main body portion (51) of the operation lever (34) moved up and down is covered with the hinge members (31) and (32) in the locked position (FIG. 8) and unlocked. In the position (FIG. 7), it has a part exposed from the hinge members (31) and (32), and a releasing display part (57) for displaying the unlocked state is provided in this part. Normally, unlocking is performed only when folding, and by folding, the operation lever (34) is locked without performing other operations. Then, when only the unlocking is performed and the folding operation is not performed, the unlocking display unit (57) is exposed, so that the operator can recognize that the unlocking is not performed.

  The hinge device (24) is used to connect the long portion (21) and the short portion (22) constituting the oblique member (8) of the work table. ) Is not limited to this, and can be applied to various uses in which two members are foldably connected.

FIG. 1 is a perspective view showing a work table as an example in which the hinge device of the present invention is used. FIG. 2 is a side view showing the use state. FIG. 3 is a side view showing the folded state. FIG. 4 is an exploded perspective view of the hinge device of the present invention. FIG. 5 is a longitudinal sectional view of the same. 6 is a cross-sectional view taken along line VI-VI in FIG. FIG. 7 is a longitudinal sectional view showing the unlocked state of the hinge device of the present invention. FIG. 8 is a longitudinal sectional view showing a folded state of the hinge device of the present invention.

Explanation of symbols

(8) Diagonal member
(21) Long part
(22) Short section
(24) Hinge device
(31) First hinge member
(32) Second hinge member
(33) Connecting shaft
(34) Control lever
(35) Compression coil spring (biasing member)
(51) Main unit
(51a) Ribs
(52) Engagement part when locked
(53) Unlock operation section
(54) Engagement part when unlocked
(55) Lock operation section
(55a) Lock release prevention engagement part
(55b) Lock position return engagement part
(56) Spring storage
(56a) Ribs
(57) Canceled display

Claims (6)

The first hinge member, the second hinge member that can be rotated in a folded state parallel to the first member, and an extended state that is relatively rotated by about 180 ° from this state, and both the hinge members are rotated. A connecting shaft that can be connected, an operation lever that can be moved to a lock position where both hinge members cannot be rotated, and a lock release position where the hinge member can be rotated, and the operation lever is urged toward the lock position. The operation lever is provided with a biasing member, and the operation lever moves in the unlocking direction with the main body portion, the locking engagement portion that engages with either the first hinge member or the second hinge member at the lock position, and the operation lever. In a hinge device having a lock release operation unit for
The operation lever further includes an unlocking engagement portion that engages with one of the first hinge member and the second hinge member at the unlock position to prevent the operation lever from moving in the lock position direction. The hinge apparatus characterized by the above-mentioned.   The hinge device according to claim 1, wherein the operation lever further includes a lock operation portion that is provided in the main body portion and moves the operation lever in the lock release position toward the lock position.   The lock release prevention engagement part which contact | abuts to any one of a 1st hinge member and a 2nd hinge member in the folding state, and prevents a movement to the lock release position direction of an operation lever is formed in the operation lever. Hinge device.   The lock operation portion is provided with a lock position return engagement portion that abuts against either the first hinge member or the second hinge member when the first hinge member or the second hinge member is folded. The hinge device according to claim 2, wherein the hinge device is rotated integrally with the moving device to return to the locked state.   The main body of the operation lever has a portion that is covered with the hinge member at the lock position and exposed from the hinge member at the lock release position, and a releasing display portion that displays the unlocked state is provided in this portion. The hinge device according to any one of claims 1 to 4.   The hinge device according to any one of claims 1 to 5, wherein a rib contacting the hinge portion is provided on a side surface of the main body portion of the operation lever.

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