JP2020066884A - Door mechanism - Google Patents

Abstract

To provide a door mechanism capable of suppressing impact and vibration when closing a door.SOLUTION: A door mechanism 110 has door closing means 108 for holding a door 105 in a closed state to an opening edge 100, the door closing means 108 including: a to-be-locked part 158 arranged on the rear surface of the door 105; a locking part 180 lockable to the to-be-locked part 158; and a driving mechanism 181 for pulling the locking part 180 backward. Also the door closing means has: a first holding position X11 at which the door 105 and the opening edge 100 are close to each other, and the locking part 180 and the to-be-locked part 158 can be locked; and a second holding position X12 at which the driving mechanism 181 retracts the door 105 rearward with the locking part 180 and the to-be-locked part 158 locked from that position.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a door mechanism.

  The door mechanism is used not only for doorways of vehicles such as buildings, automobiles, railroad cars, and aircrafts, but also for furniture for storage and the like, and its applications are various. The door mechanism has a function of partitioning the space by closing the door, and by using a door catch such as a magnet catch or a roller catch, the door can be kept closed. There is.

  Among the door mechanisms, there are some that require high airtightness in the space separated by the door. For example, a door mechanism used in a paper lantern-type display case that displays art objects and cultural assets (hereinafter referred to as "art objects, etc.") in museums and exhibition spaces of museums has a long-term preservation viewpoint. However, it is indispensable to protect works of art, etc. from changes in humidity and worm eating, and for that reason it is required to ensure the airtightness of the display case.

  As shown in Patent Document 1 as an example of such a door mechanism of an exhibition case, a main body having a substantially box shape with an opening on the front, a door closing the opening of the main body, and an opening edge of the main body are provided. There is known a door mechanism provided with a gasket. The door mechanism is equipped with a locking device, and by pressing the door from the front, the ring (locked part) provided on the back side of the door becomes a spring force against the lock lever urged by the torsion spring. The door is then moved to a predetermined position to lock the door.

  In the display case using such a door mechanism, the airtightness in the display case can be ensured for a long period of time by locking the door with the lock device in a state where the gasket is pressed and crushed.

JP-A-2000-160921 (page 4, FIG. 6)

  However, since the door mechanism of Patent Document 1 has a structure in which the door has to be pushed rearward against the spring force of the locking device while crushing the gasket when the door is moved and locked when the door is closed, Immediately after the lock is applied, the spring force disappears, the balance of the force acting on the door is momentarily lost, and only the rearward force is applied, and the door collides with the opening edge of the exhibition case and gives a shock, resulting in the main body of the exhibition case. There was a risk that noise and vibration would occur, and the works of art exhibited in the main body would be damaged by falling.

  The present invention has been made in view of such problems, and an object thereof is to provide a door mechanism capable of suppressing shock and vibration when the door is closed.

In order to solve the above problems, the door mechanism of the present invention,
A door mechanism having a door closing means for holding the door closed at the opening edge,
The door closing means includes a locked portion arranged on the back surface of the door, a locking portion that can be locked to the locked portion, and a drive mechanism that pulls the locking portion backward. A first holding position where the door and the opening edge are close to each other and the locking portion and the locked portion can be locked, and from that position, the drive mechanism causes the locking portion and the locked portion to be locked. A second holding position in which the door is pulled rearward in a state where the portion is locked.
According to this feature, the door can be pulled toward the opening side from the back surface by the drive mechanism from the first holding position, so that the door is once regulated at a position close to the opening edge and then the door is closed. It is possible to suppress the impact on the door and noise and vibration when the door is closed.

The door mechanism is provided with a temporary fixing means capable of temporarily fixing the door to the opening edge at the first holding position.
According to this feature, the door can be restricted to a position close to the opening, so that the locking portion can be reliably locked to the locked portion.

The temporary fixing means is a magnetic catch.
According to this feature, the door can be easily regulated to the first holding position only by bringing the door close to the opening, so that the locking portion can be easily locked to the locked portion.

The drive mechanism is a mechanism that locks the locking portion with the locked portion and retracts the door rearward by a series of movements.
According to this feature, locking and retracting can be performed by a series of movements, so that the door can be easily operated.

The drive mechanism includes a rotation shaft that is arranged in parallel with the door and extends in the left-right direction, and a locking arm that can lock the locking portion to the locked portion in association with rotation of the rotation shaft. It is characterized in that a plurality of the locking arms are arranged apart from each other on the rotating shaft.
According to this feature, the locking arms at a plurality of positions on the rotating shaft can act simultaneously, so that the door can be pulled in parallel to the opening edge.

The locking portion has a roller at the tip.
According to this feature, the locking portion can be easily locked and removed with respect to the locked portion, so that the door can be smoothly opened and closed.

It is a side view which shows the door mechanism in embodiment of this invention typically, (a) shows a state of a 1st holding position, (b) shows the door in the middle of a 1st holding position. The state is shown, and (c) shows the state of the second holding position. It is a perspective view showing an exhibition case which adopted a door mechanism in Example 1 of the present invention. It is a perspective view which shows a state where a door of an exhibition case is opened and which is partially cut away. It is an exploded perspective view of an exhibition case. It is the perspective view which showed the door closing means. It is a top view showing a basic casing. (A)-(c) is a side view which expanded and showed the basic housing | casing, abbreviate | omitting a part about operation | movement of a door closing. It is the perspective view which showed the door closing means of the exhibition case which adopted the door mechanism in Example 2 of this invention. (A), (b) is a side view which abbreviate | omitted a part and showed the basic housing | casing about the operation | movement of a door closing.

  A mode for carrying out the door mechanism according to the present invention will be described.

Embodiment

  A door mechanism according to an embodiment of the present invention will be described with reference to FIG.

  As shown in FIG. 1, the door closing means 108 of the door mechanism 110 includes a door 105 capable of closing the opening edge 100, a locked portion 158 arranged on the back surface of the door 105, and the locked portion 158. It includes a locking portion 180 that can be locked, and a drive mechanism 181 that pulls the locking portion 180 rearward. Further, in the door 105, at the first holding position X11, the door 105 and the opening edge 100 are close to each other, and the locking portion 180 and the locked portion 158 can be locked (FIG. 1A). By driving the drive mechanism 181 with the stopper 180 and the locked portion 158 locked, the door 105 can be pulled backward from the first holding position X11 to the second holding position X12 (FIG. 1). (B)), the locking portion 180 is capable of maintaining the door 105 pulled up to the second holding position X12 at the second holding position X12 and closing the door (FIG. 1 (c)).

  Since the door 105 is temporarily stopped at the first holding position X11 close to the opening edge 100 so that the locking portion 180 and the locked portion 158 are locked and then retracted by the drive mechanism 181, the door 105 is opened. It is possible to suppress the impact given to the edge 100 and suppress noise and vibration when the door is closed.

  As described above, the door mechanism 110 can be applied to various devices as long as the door 105 can be closed using the door closing means 108. As a specific example, a door mechanism applied to the display case according to the present invention will be described below based on examples.

  The door mechanism according to the first embodiment will be described with reference to FIGS. 2 to 7. Hereinafter, the lower right side of the paper surface of FIG. 2 and the rightward direction of the paper surface of FIG. 7 will be referred to as the front side (front side) of the door mechanism, and the vertical and horizontal directions when viewed from the front side will be described as a reference.

  The door mechanism 10 (see FIG. 3) according to the present embodiment is used in a lamp-type display case 1 that displays art and the like in an exhibition space of a museum or a museum. As shown in FIG. 2, the display case 1 keeps the humidity inside the display case constant by sealing the gap between the display case 1 and increasing the airtightness inside the display case 4 when the door 5 is closed. In order to prevent the contaminants contained in the outside air from entering and to suppress the deterioration of the exhibits, as shown in FIG. 3, when the door 5 is opened, the door 5 is opened. Since it is arranged at a position along the outer side of the side wall 35, it is possible to easily take in and out the exhibits and maintain the exhibits.

  As shown in FIGS. 2 to 4, the display case 1 is configured by connecting a box-shaped display housing 4 having an opening 4A on a box-shaped basic housing 3 having an opening 3A on the front side. The main body 2, a door 5 (door mechanism 10) capable of closing the opening 3A of the basic housing 3 and the opening 4A of the display housing 4, and a support arm mechanism fixed to the main body 2 and connected so that the door 5 can be opened and closed. 6 and the guide arm mechanism 7 mainly. The support arm mechanism 6 and the guide arm mechanism 7 have a so-called biaxial hinge structure having hinges at both ends, and when the door 5 is open, the door 5 is placed outside the side wall 35 of the base housing 3. It can be arranged along the line.

  First, the basic housing 3 will be described with reference to FIG. The side wall 35, 36, 37 is fixed to the right side surface, the rear side surface, and the left side surface of the rectangular parallelepiped frame 30, respectively, and the base casing 3 is fixed to the upper side surface with the airtight plate 39, and is mounted near the center of the airtight plate 39. The table 38 is configured by being fixed. The side wall 37 has a structure in which the lower end serves as an axis and the upper end opens to the left (see FIG. 3).

  The frame 30 is formed with two square-shaped four-dimensional frames in a plan view in which a pair of front and rear width rod members 30a, 30a extending in the left-right direction and a pair of left-right depth rod members 30b, 30b extending in the front-rear direction are connected. The two four-sided frames are vertically spaced apart from each other, and the respective corner portions facing each other in the vertical direction are connected by vertical rod members 30c, 30c, 30c, 30c extending in the vertical direction. An opening edge 30f (door mechanism 10) is formed by the front upper and lower width rod members 30a, 30a and the front left and right vertical rod members 30c, 30c, and the opening edge 30f defines the opening 3A.

  Further, in the four-sided frame on the lower side of the frame 30, a central depth rod member 30d extending in the front-rear direction is provided in the center portion in the left-right direction, and the central depth rod member 30d and the left and right depth rod members 30b are provided. A central width rod member 30e extending in the left-right direction is provided in the central portion in the front-rear direction between the spaces. Due to these, the structural strength of the frame 30 is enhanced.

  Further, the basic housing 3 is provided with a door closing means 8 (door mechanism 10) and a magnet catch 9 for magnetizing the door 5 to hold it in a temporary fixing position (first holding position X1 (FIG. 7)). . The door closing means 8 pulls the door 5 at the temporary fixed position to the closed position (second holding position X2 (FIG. 7)) by operating the handle 84 fitted with the side wall 37 opened. Further, the magnet catch 9 is internally provided with a coil spring as an urging means (not shown), and the front end surface of the head of the magnet catch 9 is pushed out by the coil spring in the opened state and is substantially the same as the front end surface of the packing P described later. They are arranged on the same plane.

  Next, the display housing 4 will be described with reference to FIGS. 2 to 4. The display housing 4 hermetically seals edges of the glass side plates 41, 42, 43 having a rectangular shape in side view, the glass top plate 48 having a square shape in plan view, and the airtight plate 39 of the base housing 3 with a caulking agent (not shown). The front end faces of the glass side plates 41 and 43 are substantially flush with the front end face of the airtight plate 39 (see FIG. 3). An opening edge 40 (door mechanism 10) is formed in the opening 4 </ b> A of the display housing 4 by the glass top plate 48, the pair of left and right glass side plates 41 and 43, and the front end portion of the width rod member 30 a above the front side of the frame 30. The opening edge 40 defines the opening 4A.

  Further, as shown in FIG. 3, a packing P is fixed to the main body 2 along the opening edge 40 with an adhesive.

  Next, the door 5 will be described. Referring to FIG. 4, the door 5 includes a glass side plate 50 having a rectangular shape in a side view, which is inserted from above into a slit of a side wall 55 formed in a C shape in a plan view by bending both end portions of a thin metal plate. It is formed by fixing a thin plate-shaped support plate member 56, which is arranged on the inner surface side of the side wall 55 to face the front end face of the side wall 55, with a caulking agent. For convenience of description, the side end (right side end) of the door 5 on the side wall 35 side is the inner diameter side end with the support arm mechanism 6 side of the guide arm mechanism 7 at the time of opening / closing the door 5 as the inner diameter side. 5R and the opposite side end (left side end) as the outer diameter side end 5L.

  The side wall 55 is formed by processing a thin metal plate into a rectangular plate shape in a side view. The support plate member 56 is a thin metal plate having magnetism, and has a plate-like door side attachment projecting from the lower end portion on the outer diameter side end portion 5L side to the inner surface side on which the guide arm mechanism 7 is attached. The member 51 is fixed. Further, on the inner surface side of the support plate member 56, locked portions 58, 58 which are aligned so that the locking portions 80, 80 of the door closing means 8 can be locked are fixed. The door-side mounting member 51 is not limited to the plate shape, but may be a block shape or a frame shape, and the shape thereof is not limited.

  Next, the door closing means 8 will be described with reference to FIGS. 4 and 5. For the sake of convenience of description, only one of the left and right members will be described unless otherwise specified. The door closing means 8 includes a locked portion 58, a locking portion 80, and a drive mechanism 81 that pulls the locking portion 80 rearward. At the time of closing the door, the door closing means 8 is arranged on the inner surface of the support plate member 56 of the door 5 and in the vicinity of the inner surface.

  The locked portion 58 is a member formed in a hat shape in a plan view by bending a metal plate, and its legs 58b and 58b are fixed to the door 5 from the inner surface side of the support plate member 56 of the door 5. . Further, on the back surface of the head portion 58a of the locked portion 58, an inclined surface 58e is formed from an upper portion to an intermediate apex portion 58d, and an inclined surface 58f is formed from an apex portion 58d to a lower portion, which extends in a substantially horizontal direction at a lower end. A mountain-shaped member 58c having an end surface 58g is fixed. As will be described later, the mountain-shaped member 58c can regulate the downward movement of the roller 80a of the locking portion 80 and can maintain the closed state of the door 5.

  The locking portion 80 is provided at the tip of a locking arm 83 of the drive mechanism 81 described later. The locking portion 80 includes a cylindrical body 80b pinned and fixed at the upper end of the rod-shaped portion 83c, and a pair of rollers 80a rotatably attached to the tip of the cylindrical body 80b about a shaft extending in the left-right direction. And 80a. Since the locking portion 80 has the rollers 80a and 80a, the locking portion 80 can smoothly move upward or downward on the inclined surfaces 58e and 58f of the mountain-shaped member 58c of the locked portion 58, and the locked portion It is easy to engage and disengage with 58.

  The drive mechanism 81 includes a rotating shaft 82 arranged in parallel with the door 5 and extending in the left-right direction, and a locking arm capable of locking the locking portion 80 to the locked portion 58 in association with the rotation of the rotating shaft 82. 83 and a handle 84 attached to the left end of the rotating shaft 82 and capable of rotating the rotating shaft 82.

  Since the two locking arms 83 are arranged on the rotating shaft 82 so as to be separated from each other on the rotating shaft 82, the locking arms 83, 83 at two positions of the rotating shaft 82 are simultaneously operated. Therefore, the door 5 can be pulled in parallel to the opening edges 30f and 40 while the locking portion 80 is locked to the locked portion 58.

  The locking arm 83 includes an oval-shaped link plate 83a in side view, an L-shaped plate 83b that is L-shaped in side view, and a linear rod-shaped portion 83c. One end of the link plate 83a is fixed to the rotating shaft 82 by welding, and the other end thereof is rotatably connected to the L-shaped plate 83b. A hexagonal column portion 83d is welded and fixed to the front end portion of the other end of the L-shaped plate 83b, and a rod-shaped portion 83c having a smaller diameter and extending in the vertical direction is fixed to the hexagonal column portion 83d. An upper end portion of the rod-shaped portion 83c serves as a locking portion 80.

  The rod-shaped portion 83c is loosely formed in a guide hole 30h that is formed in a guide portion 30g fixed to the vertical rod member 30c (see FIG. 4) on the front left side of the frame 30 and that vertically penetrates. As a result, when the locking arm 83 rotates, the rod-shaped portion 83c moves substantially up and down in conjunction with the rotation of the rotation shaft 82. When the handle 84 is excessively rotated, the columnar body 80b or the hexagonal column portion 83d comes into contact with the guide portion 30g, whereby excessive vertical movement of the locking arm 83 is restricted.

  With the side wall 37 opened, the handle 84 can be attached to and detached from the left end of the rotating shaft 82, and the rotating shaft 82 can be rotated by the handle 84. The handle 84 can be removed when not in use (see FIGS. 2 and 3). By inserting the handle 84 into the left end of the rotating shaft 82, a latch (not shown) provided on the rotating shaft 82 is released, and the rotating shaft 82 becomes rotatable. Further, when the handle 84 is removed, the latch is engaged and the rotation of the rotation shaft 82 is restricted.

  Next, the door closing operation of the door mechanism 10 will be described with reference to FIGS. 6 and 7. For convenience of description, the basic housing 3 is used for description, and for convenience of description, the side wall 37 is omitted in FIG. 6, and the support arm mechanism 6 and the guide arm mechanism 7 are indicated by chain double-dashed lines. 7, the side wall 37 is not shown, the support arm mechanism 6 and the guide arm mechanism 7 are not shown, and the glass side plates 43 and 50 and the packing P above the base housing 3 are shown.

  When the door 5 (see FIG. 3) in the opened state is grasped and moved in the door opening direction, the door 5 is supported and guided by the support arm mechanism 6 and the guide arm mechanism 7, and the door 5 in front of the opening edges 30f and 40 is moved. It moves to the position X0 (see FIG. 7A). When the door 5 is pushed further rearward from that position, the magnet catch 9 is magnetically attracted to the support plate member 56 at a position close to the opening edges 30f and 40, and the locking portion 80 of the door 5 engages with the locked portion 58. It is temporarily fixed to the stoppable first holding position X1 and its movement is restricted (see FIG. 7B).

  Then, the handle 84 is operated to rotate the rotary shaft 82 counterclockwise as viewed from the left side, whereby the locking arm 83 moves substantially upward, and the locking portion 80 approaches the locked portion 58 and then moves downward. The edge 58h, which is the corner between the inclined surface 58f and the lower end surface 58g, comes into contact with and is locked (see FIGS. 6A and 7B). At this time, the door 5 remains stationary at the first holding position X1.

  From this state, when the rotating shaft 82 is further rotated counterclockwise in the left side view by operating the handle 84, the rod portion 83c moves further upward, and as the rollers 80a, 80a roll upward on the inclined surface 58f, they move upward. The locked portion 58 is retracted rearward, and the door 5 reaches the second holding position X2. At this time, the head of the magnet catch 9 is pushed while crushing the coil spring of the magnet catch 9, and the door 5 is pulled in while crushing the packing P installed between the door 5 and the opening edge 40. The airtightness in 1 can be maintained. Then, when the rollers 80a, 80a cross the apex portion 58d (see FIGS. 6B and 7C), the downward movement of the rollers 80a, 80a is restricted by the upper inclined surface 58e. Thus, the door 5 can be kept closed. Further, when the handle 84 is removed, the rotation shaft 82 is latched, the rotation of the rotation shaft 82 is restricted, and the door 5 can firmly maintain the closed state.

  To release the closed state of the door 5, the handle 84 may be operated to rotate the rotary shaft 82 clockwise in the left side view. Along with this, the head portion of the magnet catch 9 is pushed out by the coil spring and is arranged on substantially the same plane as the front end surface of the packing P.

  As described above, since the door 5 can be pulled from the rear surface to the opening 3A, 4A side from the first holding position X1 by the drive mechanism 81, the door 5 is once restricted at a position close to the opening edges 30f, 40. By closing the door from the above, the impact given to the opening edges 30f and 40 by the door 5 can be suppressed, and noise and vibration can be suppressed when the door is closed.

  Since the door mechanism 10 is provided with the temporary fixing means capable of temporarily fixing the door 5 to the opening edges 30f and 40 at the first holding position X1, the door 5 can be restricted to a position close to the opening edges 30f and 40, and thus the locking is performed. The portion 80 can be reliably locked to the locked portion 58.

  Further, since the temporary fixing means is the magnet catch 9, the door 5 can be easily regulated to the first holding position X1 only by bringing the door 5 close to the openings 3A and 4A. Can be easily locked to.

  Further, since the drive mechanism 81 is a mechanism that locks the locking portion 80 to the locked portion 58 and retracts the door 5 rearward by a series of movements, the driving mechanism 81 locks and retracts by a series of movements. Therefore, the door can be easily operated.

  In addition, the drive mechanism 81 is a member that is arranged parallel to the door 5 and that extends in the left-right direction, and that engages with the engaging portion 80 in the engaged portion 58 in conjunction with the rotation of the rotating shaft 82. Since the two locking arms 83 are provided on the rotating shaft 82 so as to be separated from each other, the locking arms 83 at two positions on the rotating shaft can act simultaneously. Therefore, the door 5 can be pulled in parallel to the opening edges 30f and 40.

  Further, since the locking portion 80 has the rollers 80a, 80a at the tip thereof, the locking portion 80 can be easily locked / removed with respect to the locked portion 58, so that the door 5 can be smoothly opened and closed. .

  An example in which the locked portion 58 is pulled rearward by moving the locking portion 80 upward while contacting the mountain-shaped member 58c of the locked portion 58 has been described. The locking arm 83 may be tilted in the front-rear direction with the rotation of the moving shaft 82, and the locked portion 58 may be pulled backward by the locking portion 80.

  A door mechanism according to the second embodiment will be described with reference to FIGS. The same components as those shown in the above-mentioned embodiment are designated by the same reference numerals, and the duplicated description will be omitted.

  As shown in FIG. 8, the door closing means 8'includes a locked portion 58 ', a locking portion 80, and a drive mechanism 81'. The locked portion 58 ′ is a member formed by bending a metal plate into a hat shape in a plan view, and its leg portions 58 ′ b and 58 ′ b are fixed from the inner surface side of the support plate member 56 of the door 5. ing. Further, an inverted U-shaped recess 58'c is formed substantially in the center of the lower end of the head 58'a of the locked portion 58 ', and a pair of lower end edges 58'g are formed on the left and right of the recess 58'c. , 58'g are formed.

  The drive mechanism 81 ′ is mainly composed of a rotating shaft 82, a locking arm 83 ′, and a handle 84. The locking arm 83 includes a fixed portion 83'a and a linear rod-shaped portion 83'c. One end of the fixed portion 83′a is screwed to the rotating shaft 82 and the other end of the rod portion 83′c is welded and fixed. Therefore, the locking arm 83 is interlocked with the rotation of the rotating shaft 82. 'Rotates around the rotary shaft 82. The front end portion of the rod-shaped portion 83'c serves as a locking portion 80.

  Next, the door closing operation of the door mechanism 10 will be described. As shown in FIG. 9A, when the door 5 is temporarily fixed by the magnet catch 9 at the first holding position X1, and the locking portion 80 is in a state capable of being locked by the locked portion 58 ', By rotating the rotating shaft 82 counterclockwise as viewed from the left side by operating the handle 84, the locking arm 83 'interlocks with each other to make a circular motion, and the locking portion 80 is attached to the locked portion 58' from substantially below. After approaching, the pair of rollers 82a, 82a come into contact with the pair of lower end edges 58'g, 58'g to be locked (see FIG. 9A). At this time, the door 5 remains stationary at the first holding position X1.

  From this state, when the rotating shaft 82 is further rotated counterclockwise in the left side view by operating the handle 84, the rollers 82a, 82a move further upward while rolling the lower edges 58'g, 58'g. The locking portion 58 'is retracted rearward, and the door 5 reaches the second holding position X2. At this time, since the door 5 is pulled in while crushing the packing P installed between the door 5 and the opening edge 40, the airtightness in the display case 1 can be maintained. Then, the cylindrical body 80b contacts the recess 58'c, and the upward movement of the locking arm 83 'is restricted (see FIG. 9B). To release the closed state of the door 5, the handle 84 may be operated to rotate the rotary shaft 82 clockwise in the left side view.

  Although the embodiments of the present invention have been described above with reference to the drawings, the specific configurations are not limited to these embodiments, and any modifications or additions within the scope of the present invention are included in the present invention. Be done.

  For example, the locking portion 80 has the rollers 80a and 80a at the tip, but the invention is not limited to this. For example, the locking portion may have a wedge-shaped member at the tip, and the wedge-shaped member may be a hat-shaped locked portion in a plan view. The locked portion may be pulled back while being locked.

  Further, although the temporary fixing means has been described as the magnet catch 9 including the biasing means, the present invention is not limited to this, and the biasing means may be a leaf spring or the like, and may not include the biasing means. The magnetic catch may be a roller catch or a ball catch. Further, the roller of the locking portion may be made of a permanent magnet, and the roller may have a function as a temporary fixing means.

  Further, although it has been described that there are two locking arms and they are arranged at two positions on the rotating shaft 82 so as to be separated from each other, the invention is not limited to this, and the number of locking arms is 1 or 3 or more. The rotation shaft 82 may be arranged arbitrarily.

  Further, although the handle 84 has been described as being attached to the left side wall 37 side, the present invention is not limited to this, and it may be on the right side wall 35 side or the rear side wall 36 side.

  By rotating the handle 84, the locking portion 80 is moved to lock the locked portions 58 and 58 'to close the door 5, and the handle 84 is rotated in the opposite direction. Although the example in which the door closed state can be released has been described, the present invention is not limited to this, and the door closed state may be closed by removing the handle, and the door closed state may be released by attaching the handle. Alternatively, the door may be closed by a means other than the handle, such as button operation or remote operation.

  Further, although the packing P is described as being adhesively fixed to the opening edge 40, the packing P is not limited to this, and may be adhesively fixed to the door side, or the packing may not be provided.

  Further, although the display case 1 has been described as forming a square in a plan view, the present invention is not limited to this, and may be, for example, a right triangle, an octagon, or a semicircle in a plan view.

  Further, although it has been described that the display housing 4 is surrounded by the glass side plates 41, 42, 43, the glass top plate 48, and the glass side plate 50 of the door 5 when the door is closed, the present invention is not limited to this, and a translucent material such as an acrylic plate is used. May be used, or a part thereof may be a non-transparent plate or a light reflective plate.

1 Display Case 3 Basic Housing 3A Opening 30f Opening Edge 4 Exhibition Housing 4A Opening 40 Opening Edge 5 Doors 8,8 'Door Closing Means 10 Door Mechanism 58,58' Locked Part 80 Locking Part 81,81 'Drive Mechanism 82 Rotating shafts 83, 83 ′ Locking arm 84 Handle 100 Opening edge 105 Door 108 Door closing means 110 Door mechanism 158 Locked part 180 Locking part 181 Drive mechanism P Packing X1 First holding position X2 Second holding position X11 One holding position X12 Second holding position

Claims (6)

A door mechanism having a door closing means for holding the door closed at the opening edge,
The door closing means includes a locked portion arranged on the back surface of the door, a locking portion that can be locked to the locked portion, and a drive mechanism that pulls the locking portion backward. A first holding position where the door and the opening edge are close to each other and the locking portion and the locked portion can be locked, and from that position, the drive mechanism causes the locking portion and the locked portion to be locked. A second holding position in which the door is pulled rearward in a state where the door is locked.   The door mechanism according to claim 1, wherein the door mechanism includes temporary fixing means that can temporarily fix the door to the opening edge at the first holding position.   The door mechanism according to claim 2, wherein the temporary fixing means is a magnet catch.   4. The drive mechanism is a mechanism for locking the locking portion to the locked portion and retracting the door rearward by a series of movements. Door mechanism.   The drive mechanism includes a rotation shaft that is arranged in parallel with the door and extends in the left-right direction, and a locking arm that can lock the locking portion to the locked portion in association with rotation of the rotation shaft. The door mechanism according to any one of claims 1 to 4, further comprising: a plurality of the locking arms, which are spaced apart from each other on the rotating shaft.   The door mechanism according to claim 1, wherein the locking portion has a roller at a tip thereof.

Images