JP2018059372A - Door opening and closing device of display case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a door opening and closing device of a display case having a relatively simple structure capable of safely moving a door panel and facilitating an opening and closing of a door.SOLUTION: A display case 100 includes a display case body 1 having an opening 4 on a front surface, two glass plates 2 and 3 provided in the opening 4, and a door opening and closing device 5 capable of opening and closing the two glass plates 2 and 3 in a sliding door style in a longitudinal direction. The door opening and closing device 5 includes a guide rail 30 provided on a bottom base frame 8 as moving means for the glass plate 2 in a lateral direction, an operation box 50 having a ball screw 35 as the moving means for the glass plate 2 in the longitudinal direction, a reversibly rotatable motor 28 as driving means, and an operation unit 60 including a switch for driving the motor 28 and a controller.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a device for opening and closing a door such as a glass plate in a large display case installed in an art museum or a museum.

  Conventionally, in large display cases installed in museums, museums, etc., display cases are known in which a plurality of transparent glass plates provided in the front opening of the display case body are formed so that they can be opened and closed as doors. Yes. In such an exhibition case, multiple transparent glass plates are arranged on the same surface so as not to hinder the appreciation of the exhibits. When working inside the display case, etc., it is necessary to be able to open and close at least one of a plurality of transparent glass plates in a sliding door manner.

  Therefore, for example, in Patent Document 1, in order to be able to open and close a specific glass plate as a door, the position of the glass plate is moved forward from the position of the other glass plate, and then from that position in the left-right direction. An exhibition case is disclosed that can be moved to open the front opening of the display case body.

JP 2011-62260 A

  However, the conventional display case has a complicated structure for moving the position of the glass plate to be opened / closed forward from the position of the other glass plate, resulting in high cost and complicated maintenance.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a door opening / closing device for an exhibition case that can be easily opened and closed by moving a door plate such as a glass plate safely with a relatively simple structure.

(1) A door opening and closing device for an exhibition case according to the present invention includes a case main body and a plurality of transparent rigid bodies mainly disposed at a position where the front opening of the case main body is flush with the closed position. And moving one of the adjacent doorboards in either the front or back direction and then moving in the width direction to superpose the doorboard on the adjacent doorboard to open the front surface of the case body. In the display case, a guide rail capable of placing one of the door plates movably in the width direction and a lower portion of the guide rail, and the guide plate in a state where one of the door plates is placed. A ball screw mechanism that guides the rail so that it can move in the front-rear direction, and a lower part of the guide rail, and supports the rail so that it can be guided in the front-rear direction according to the operation of the ball screw mechanism Characterized in that it comprises a guide mechanism, the more that.

  According to the configuration of (1) above, the guide rail on which one of the door plates is placed can be easily and safely moved in the front-rear direction.

(2) In the door opening and closing device of the display case of (1), a drive unit capable of driving the ball screw mechanism, a switch unit for turning on / off power supply from a power source to the drive unit, and the ball screw mechanism A handle portion that can be attached to the front side of the case main body and that can manually operate the ball screw mechanism, and when the switch portion is in an on state, an operation by the handle portion is performed. A lock mechanism is provided that locks the handle so that it cannot be operated, and can be operated by the handle when the switch is off or when power is not supplied to the switch due to a power failure. It is preferable that

  According to the configuration of (2) above, the ball screw mechanism can be manually operated using the handle portion only when the switch portion is in an off state or when power is not supplied to the switch portion due to a power failure.

(3) In the door opening and closing device for the display case according to (1) or (2), a drive unit capable of driving the ball screw mechanism, and a switch unit for turning on / off power supply from a power source to the drive unit; A detection unit that detects that one of the door plates has moved in the width direction, and when the detection unit detects that one of the door plates has moved in the width direction, It is preferable that an off signal to be turned off can be output, and the switch unit cuts off power supply from the power source to the driving unit when the off signal is received.

  According to the configuration of (3) above, it is possible to detect that the door plate has moved a predetermined distance from the closed position on the guide rail, and to cut off the electrode supply from the power source. At this time, even if there is an operation in the switch unit, the drive unit is not driven and the guide rail can be prevented from moving. Therefore, safety can be further improved.

(4) In the door opening / closing device for the display case of (1) to (3) above, the ball screw mechanism is protected between the guide rail and the ball screw mechanism in a state where the guide rail is movable in the front-rear direction. It is preferable that a dustproof member is provided.

  According to the configuration of (4) above, the ball screw mechanism can be protected from dust and the like. Thereby, the maintenance time of the display case can be prolonged as compared with the case without the dustproof member, and damage to the ball screw mechanism can be prevented.

(5) In the display case door opening and closing device according to (1) to (4), the guide mechanism is protected between the guide rail and the guide mechanism in a state where the guide rail is movable in the front-rear direction. It is preferable that a dustproof member is provided.

  According to the configuration of (5) above, the guide mechanism can be protected from dust and the like. Thereby, the maintenance time of the display case can be prolonged as compared with the case without the dustproof member, and damage to the guide mechanism can be prevented.

It is a simplified front view which shows the display case in 1st Embodiment of this invention. It is a simplified longitudinal cross-sectional view which shows the display case of FIG. 1, Comprising: It is AA arrow sectional drawing of FIG. FIG. 3 is a partially enlarged longitudinal sectional view of FIG. 2. It is a principal part expanded longitudinal sectional view which shows the closed state of the glass plate upper part in the display case of FIG. (A) is a simplified front view showing the hook member of the hook part, (b) is an enlarged front view of the main part of the hook part, (c) is a cross-sectional view taken along the line BB in FIG. It is CC sectional view taken on the line of FIG.5 (b). It is a partially expanded longitudinal cross-sectional view which shows the door opening / closing apparatus in the display case of FIG. (A) is a simplified top view which shows an operation part box and a guide rail, (b) is a simplified top view which shows an operation part box, a linear guide, and a nut housing. (A) is a principal part enlarged plan view which shows a linear guide and a nut housing, (b) is a principal part enlarged front view which shows a linear guide and a nut housing. FIG. 3 is an enlarged longitudinal sectional view showing a main part of a linear guide of a door opening / closing device in the display case of FIG. 2. FIG. 3 is an enlarged vertical sectional view of a main part showing a closed state of a lower part of a glass plate in the display case of FIG. 2. (A) is the simplified front view which shows a limit switch, (b) is a principal part enlarged plan view which shows a limit switch. It is a principal part expanded longitudinal sectional view which shows the open state of the glass plate upper part in the display case of FIG. It is a principal part expanded longitudinal cross-sectional view which shows the open state of the glass plate lower part in the display case of FIG. It is a principal part expanded longitudinal cross-sectional view which shows the door opening / closing apparatus in 2nd Embodiment of this invention.

<First Embodiment>
Hereinafter, a first embodiment will be described with reference to FIGS. In the following, the front-rear direction refers to the front-rear direction of the display case 100, and the left-right direction refers to the width direction of the display case 100. Moreover, in this embodiment, although the description is mainly given with respect to the peripheral portion of the glass plate 2, the peripheral portion of the glass plate 3 is substantially the same as the peripheral portion of the glass plate 2, so the description may be omitted.

  1 and 2, the display case 100 includes a display case main body 1 having an opening 4 on the front surface, two glass plates 2 and 3 provided in the opening 4, two glass plates 2, And a door opening and closing device 5 capable of opening and closing 3 in the front-rear direction in a sliding door manner. The external shape of the display case main body 1 is a large box, and the opening 4 can be closed in an airtight state by the two glass plates 2 and 3, and the internal display space is passed through these two glass plates 2 and 3. The exhibition housed in 6 can be browsed and viewed.

  In the state of FIGS. 1 and 2, the two glass plates 2 and 3 are supported on the same surface by an upper support mechanism 9 provided on the upper base frame 7 of the display case body 1. Moreover, the upper decorative panel 11 and the lower decorative panel 12 (in FIG. 2, the state opened by the dotted line is also shown above and below the opening 4 of the display case main body 1. The alternate long and short dash line indicates the trajectory of the tip. The decorative panels 11 and 12 are openable and closable or detachable with respect to the display case main body 1.

  As shown in FIGS. 3 and 4, the upper support mechanism 9 has a substantially U-shaped cross section released downward and extends in the left-right direction, and the upper rail 13 of the glass plate 2 and the depth of the upper rail 13. An auxiliary rail 14 provided rearward in the direction, a rolling wheel 15 capable of rolling in the upper rail 13 or in the auxiliary rail 14, a hanging metal fitting 16 suspended from the lower part of the rolling wheel 15, and a hanging metal fitting 16 A fixing bracket 17 provided at the lower portion of the glass plate 2, and both upper end sides of the glass plate 2 are sandwiched between the fixing bracket 17 via a pair of shim members 18. The glass plate 3 is also supported by each part similar to the periphery of the glass plate 2.

  A part of the rear vertical wall of the upper rail 13 is provided with a notch (not shown) slightly wider than the diameter of the wheel 15 so that the wheel 15 can enter the upper rail 13 from the auxiliary rail 14. It has been. The auxiliary rail 14 is provided by welding a box-shaped member having no front and lower wall surfaces to the rear standing wall of the upper rail 13, and the lower side is open. Therefore, the wheel 15 can move in the front-rear direction between the upper rail 13 and the auxiliary rail 14 via the notch (not shown) of the upper rail 13, and when the opening 4 is closed. 3 and 4, the wheel 15 is located in the auxiliary rail 14 so that when the opening 4 is opened, the wheel 15 can be located in the upper rail 13 as shown in FIG. 12. It has become. Similarly, the glass plate 3 is supported by a wheel similar to the wheel 15 so that it can roll in an upper rail 48 similar to the upper rail 13 or an auxiliary rail 49 similar to the auxiliary rail 14. It can move between the upper rail 48 and the auxiliary rail 49 via a notch (not shown) in the upper rail 48 similar to the notch (not shown) of the rail 13.

  As shown in FIG. 4, the upper base frame 7 is provided with a magnet catch 19, a flap door 20, and an open catch portion 23 for fixing the glass plates 2 and 3. The magnet catch 19 can attract the fixing bracket 17 by magnetic force. The flap door 20 is rotatably supported via a hinge 21 at the lower end portion of the front portion 7a of the upper base frame 7 (see FIG. 2 for the operation), and a cushioning member provided at the tip when closed. 22 is in pressure contact with the upper surface of the glass plate 2. Further, when the flap door 20 is pushed upward from below, the push-open type is opened by a reaction force of a spring (not shown) in the open catch portion 23 generated when the lower portion of the open catch portion 23 is pushed. It is a door.

  As shown in FIGS. 2 and 6, the lower part of the glass plate 2 has a lower support mechanism 10 that supports the glass plate 2 and a lower part that supports the lower support mechanism 10 via an operating unit box 50 described later. A base frame 8 is provided. The lower support mechanism 10 includes a metal hook portion 24 provided over the entire width of the lower portion of the glass plate 2. As shown in FIGS. 5A to 5D, the cross section 24 is formed in a substantially H-shaped cross section, and is pivotally supported by a pair of support plates 25 having slits 25a and the slits 25a. A door wheel 26 having a substantially horizontal support shaft 26a as a center, and a guide roller 27 having a support shaft 27a that is rotatably supported at both ends of the support plate 25 in a substantially vertical direction. In addition, the upper part of the hook part 24 receives and supports the lower part of the glass plate 2 between the pair of support plates 25, and the lower part of the hook part 24 supports a door wheel 26 and a guide provided between the pair of support plates 25. The roller 27 is pivotally supported so that it can roll. The glass plate 2 is movable in the left-right direction by rolling in a guide rail 30 of the glass plate 2 described later by the door wheel 26 and the guide roller 27. Further, after the lower decorative panel 12 is opened, the hook section 24 can be moved in the front-rear direction by a door opening / closing device 5 described later.

  The lower base frame 8 is provided with a lower decorative panel 12 for fixing the glass plate 2 via a hack portion 24. The lower decorative panel 12 is an inverted L-shaped member in a side view, and a lower end of the lower decorative panel 12 is rotatably supported by the lower base frame 8 via a hinge 31 and is bent to extend inward at the upper end. 39. In a state where the buffer member 32 provided at the inner end of the stopper 39 is pressed against the lower surface of the glass plate 2, the locking device 51 provided on the lower decorative panel 12 is locked to the lower base frame 8. By doing so, the closed state can be maintained. Further, the lower decorative panel 12 is disposed at a position where the hook part 24 and the door opening / closing device 5 can be concealed from the front.

  As shown in FIG. 6, the door opening and closing device 5 is provided on the lower base frame 8, and includes a guide rail 30 as a moving means for the left and right direction of the glass plate 2 and a ball screw 35 as a moving means for the front and rear direction of the glass plate 2. The actuating unit box 50, the motor 28 capable of rotating in the forward / reverse direction as driving means, the switch unit for driving the motor 28, and a control device (a device having a CPU, a memory, a storage unit storing a program, etc.). Including an operation unit 60. In addition, as shown in FIG. 7B, a pair of linear guides 33 is also provided inside the operation unit box 50.

  As shown in FIG. 7A, the guide rail 30 includes a movable guide rail 30a in which two rows in the front and rear rows are arranged, and a pair of fixed guide rails 30b in which the two rows in the front and rear rows are arranged. I have. As shown on the left side of FIG. 8A, the movable guide rail 30 a is connected to each of the pair of linear guides 33 by bolts 43 and to the nut housing 34 by bolts 44. The guide rail 40 of the glass plate 3 includes a movable guide rail similar to the movable guide rail 30a and a fixed guide rail similar to the fixed guide rail 30b.

  Further, as shown in FIG. 7B, the pair of linear guides 33 are disposed on the left and right sides of the operation unit box 50 with the ball screw 35 as a substantial center. The pair of linear guides 33 are fixed on a lower rail 36 laid in the front-rear direction on the bottom surface of the opening 4 of the display case body 1 as shown in the left side of FIG. 8B and FIG. Yes. A movable body 37 is provided on the pair of linear guides 33 so as to be slidable in the front-rear direction, and a movable guide rail 30 a is connected to the movable body 37 by a bolt 43 or the like. As shown in FIGS. 7 (a), 9 and 10, lids 53 and 54 having slits in the front-rear direction at a part of the center are formed on the upper portions of the pair of linear guides 33 and the nut housing 34. (Dust-proof member) is provided. As a result, when the glass plate 2 is moved back and forth, dust such as dust can be prevented from entering the operating portion box 50 from the vicinity of the connecting portion between the nut housing 34 and the guide rail 30. Compared to those without 53 and 54, the door opening / closing device 5 can be prevented from being damaged. In the drawings other than FIG. 7A, FIG. 9, and FIG. 10, the lids 53 and 54 may not be shown for convenience of explanation.

  As shown in FIG. 8 (a) right side, FIG. 8 (b) right side, and FIG. 10, the ball screw 35 is connected to a substantially central lower portion of the movable guide rail 30a, and has a female screw part formed therein. , And a screw shaft 41 having a male screw portion that can be screwed into the female screw portion of the nut housing 34 formed on the surface thereof. The screw shaft 41 is rotatably supported by a working unit box 50 provided on the lower base frame 8 via bearings of a pair of front and rear screw shaft support members 38. Further, the nut housing 34 is disposed at the center of the operating portion box 50 and is attached to the screw shaft 41 so as to move between the two screw shaft support members 38. As a result, when the screw shaft 41 rotates, the nut housing 34 moves back and forth, and the movable guide rail 30a is moved back and forth by connecting the movable guide rail 30a to the nut housing 34 with a bolt 44 or the like. .

  As shown in FIG. 6, one end of a transmission part 42 such as a bevel gear box is connected to the rear end of the screw shaft 41 of the ball screw 35, and the other end of the transmission part 42 is connected to a screw. A motor 28 capable of driving and rotating the shaft 41 via the transmission unit 42 is connected. The motor 28 is connected to the control device of the operation unit 60 for driving control via the wiring cable 45, and the motor 28 is operated by the control by the control device. The operation unit 60 is provided on the front surface of the lower base frame 8, and the glass plates 2 and 3 can be moved back and forth by operating an open button and a close button of the operation unit 60.

  Further, as shown in FIG. 11A, a limit switch 46 capable of detecting that the hack portion 24 has moved is located on the left side in the width direction of the opening 4 of the display case body 1. It is provided so that it may contact | abut. Although not shown, a similar limit switch is provided on the right side in the width direction of the opening 4 of the display case body 1. The limit switch 46 includes a leaf spring portion 47 a configured to exert an urging force on the side of the hook part 24, and a roller 47 b that is rotatably provided at the tip of the leaf spring part 47 a and is capable of contacting the end of the hook part 24. And a switch portion 46a that can come into contact with the surface of the leaf spring portion 47a on the side opposite to the hook portion 24 side. Further, the limit switch 46 is connected to the control device of the operation unit 60. When it is detected that the hook unit 24 has moved, the power switch and the motor 28 are electrically connected so that the motor 28 is not driven. Is designed to shut off. Specifically, as shown in FIGS. 11A and 11B, in the state where the end portion of the hook portion 24 presses the roller 47b and presses the switch portion 46a via the leaf spring portion 47a, It is in a state where it is not detected that the hack portion 24 has moved. Then, from the state of FIGS. 11A and 11B, when the hack portion 24 is separated from the roller 47b and the pressing force of the leaf spring portion 47a to the switch portion 46a is released, the signal of the switch portion 46a The control device cuts off the electrical connection between the power source and the motor 28. The motor 28 is stopped or cannot be driven. That is, when each of the glass plates 2 and 3 starts to move left and right on the movable guide rails 30a and 40a, the motor 28 cannot be driven by the control device, and the movable guide rails 30a and 40a and the glass plates 2 and 3 It becomes impossible to move in the direction.

  Next, the opening / closing operation | movement of the glass plate 2 in this embodiment is demonstrated. Since the opening and closing of the glass plate 3 is the same as the opening and closing operation of the glass plate 2, the description thereof is omitted.

  First, as shown in FIGS. 2, 4 and 10, the flap door 20 and the lower decorative panel 12 are opened from the closed position where the glass plate 2 and the glass plate 3 are flush with each other to operate the lower portion of the glass plate 2. The motor 28 is driven by pressing the open button of the unit 60, and the screw shaft 41 is rotated in a predetermined direction (for example, clockwise). Thereby, the nut housing 34 moves forward, the moving body 37 of the linear guide 33 moves forward on the lower rail 36, and the door 26 and the guide roller 27 are placed on the movable guide rail 30a. The plate 2 and the movable guide rail 30a are integrated with each other and move forward. When the glass plate 2, the hook section 24, and the movable guide rail 30a move to the front end position, the motor 28 stops and the rear row of the movable guide rail 30a matches the front row of the adjacent fixed guide rail 30b. Subsequently, by attaching a suction handle or the like to the glass plate 2 and pulling it forward, the state shown in FIGS. 12 and 13 is obtained. Here, FIG. 12 is a longitudinal sectional view seen from the right end portion side of the glass plate 3, and also shows the glass plate 3 and the peripheral portion of the glass plate 3. FIG. 13 is a longitudinal sectional view as seen from the right end side of the glass plate 3 and shows a movable guide rail 40a provided at the lower portion of the glass plate 3. The front row of the movable guide rail 40a and the movable guide A state in which the rear row of the rail 30a overlaps with one row is shown.

  Then, if the glass plate 2 is pulled to the glass plate 3 side, the door wheel 26 and the guide roller 27 that have been placed on the movable guide rail 30a roll along the fixed guide rail 30b from the movable guide rail 30a of the glass plate 2, Further, the glass plate 2 moves from the fixed guide rail 30b of the glass plate 2 through the fixed guide rail (not shown) of the glass plate 3 and the movable guide rail 40a to a position substantially matching the front surface of the glass plate 3. . At this time, the rolling wheel 15 on the upper side of the glass plate 2 is also linked to roll along the upper rail 48 of the glass plate 3 from the upper rail 13 of the glass plate 2. Therefore, the opening 4 on the front surface of the display case main body 1 corresponding to the portion where the glass plate 2 is disposed is opened.

  Next, when closing the glass plate 2 in the opened state, the screw shaft 41 is opened by moving the glass plate 2 to the original front position by performing the reverse operation to the above and pressing the close button of the operation unit 60. By rotating in the opposite direction (for example, counterclockwise) to the time of work, the nut housing 34 moves rearward and the moving body 37 of the linear guide 33 moves rearward on the lower rail 36, and the movable guide rail 30a is moved to the door. In a state in which 26 and the guide roller 27 are placed, the glass plate 2 moves together with the movable guide rail 30a to the rear and moves to the rear position at the rear end of movement. At this time, the wheel 15 on the upper side of the glass plate 2 is also moved from the upper rail 13 to the auxiliary rail 14 by an adsorption handle or the like, and the fixing bracket 17 is adsorbed to the magnet catch 19 of the upper base frame 7. When the flap door 20 and the lower decorative panel 12 are closed, the upper and lower surfaces of the glass plate 2 are stopped by the buffer members 22 and 32 and returned to the closed position.

  As described above, in the display case 100 according to the first embodiment, the guide rail 30 on which the glass plate 2 is placed or the guide rail 40 on which the glass plate 3 is placed in the front-rear direction easily and safely. It can be moved electrically.

  Further, the lids 53 and 54 can protect the ball screw 35 and the linear guide 33 and components around the ball screw 35 and the linear guide 33 from dust and the like. Thereby, the maintenance time of the display case 100 can be prolonged as compared with the case where the lids 53 and 54 are not provided, and damage to the door opening and closing device 5 can be prevented.

  Further, the limit switch 46 can detect that the glass plates 2 and 3 have moved a predetermined distance from the closed position (the position in the width direction shown in FIG. 1) on the guide rails 30 and 40. By transmitting the detection signal at this time to the control device, the control device can cut off the electrode supply from the power source to the motor 28. At this time, even if the operation unit 60 is operated, the motor 28 is not driven, and the guide rails 30 and 40 can be prevented from moving. Therefore, safety can be further improved.

Second Embodiment
Next, an exhibition case including the door opening and closing device 105 according to the second embodiment of the present invention will be described. In addition, description of the part similar to 1st Embodiment may be abbreviate | omitted. Further, in the present embodiment, description will be made mainly with respect to the peripheral portion of the glass plate 102, but the peripheral portion of the glass plate 103 is substantially the same as the peripheral portion of the glass plate 102, and thus description thereof may be omitted. Moreover, in this embodiment, the site | part of the code | symbol same as the code | symbol of 1st Embodiment and the last two digits is the same site | part.

  FIG. 14 is an enlarged vertical sectional view showing a main part of the door opening / closing device 105 according to the second embodiment. Hereinafter, with reference to FIG. 14, the manual drive means of the door opening and closing apparatus 105 in 2nd Embodiment is demonstrated. It should be noted that the door opening / closing device 105 is moved by the manual drive means only when the power of the door opening / closing device 5 is turned off, or when the door opening / closing device 5 is not turned on due to a power failure or the like and the motor 28 as the driving means cannot be used. It can be activated. In other words, as long as power is supplied from the power source to the door opening and closing device 5 in consideration of safety, the ball screw 135 is locked by the lock mechanism so that it cannot be operated manually, and the manual drive means cannot be used. Yes. As an example of the lock mechanism, a control that detects a detection signal when the operation handle 152 is attached to the tip of the operation unit 160 in a state where power is supplied from the power source to the door opening and closing device 5 and receives a detection signal. An interlock mechanism in which a stopper pops out in front of and behind the nut housing 134 according to a command from the device and is locked, and when the operation handle 152 is removed from the tip of the operation unit 160 and is not detected, the stopper is released and the lock is released. Various things are possible, such as (not shown). However, the present invention is not limited to the interlock mechanism, and it is manually applied except when the door opening / closing device 5 is turned off, or when the door opening / closing device 5 is not turned on due to a power failure or the like and the motor 28 as the driving means cannot be used. Any configuration may be used as long as it can be controlled so that the ball screw 135 cannot be operated.

  As shown in FIG. 14, the door opening and closing device 105 in the second embodiment is provided on the lower base frame 108, guide rails 130 and 140 as means for moving the glass plates 102 and 103 in the horizontal direction, the glass plate 102, 103 includes an operation unit box 150 serving as a moving means in the front-rear direction and an operation unit 160. The operating unit box 150 includes a linear guide 133, a nut housing 134, and a ball screw 135.

  The guide rail 130 of the glass plate 102 has a movable guide rail 130a and a fixed guide rail (not shown) similar to the fixed guide rail 30b of the first embodiment. Two of each are extended. The movable guide rail 130 a is connected to the linear guide 133 and the nut housing 134 by bolts 143 and 144. Similarly, the guide rail 140 of the glass plate 103 includes a movable guide rail 140a and a fixed guide rail 140b. The linear guide 133 is disposed on the left and right of the operation unit box 150, and is provided with a movable body 137 that can be moved back and forth on a lower rail 136 laid in the front-rear direction on the bottom surface of the opening 104 of the display case body 101. The movable guide rail 130a is connected to the movable body 137 by a bolt 143 or the like.

  The ball screw 135 includes a screw shaft 141 and a nut housing 134, and the screw shaft 141 is rotated via a bearing of a pair of front and rear screw shaft support members 138 on an operation unit box 150 provided on the lower base frame 108. Supported as possible. Further, the nut housing 134 is disposed inside the operation unit box 150 and is attached to the screw shaft 141 so as to move between the two screw shaft support members 138. Thereby, when the screw shaft 141 rotates, the nut housing 134 moves back and forth. Further, by connecting the movable guide rail 130 a to the nut housing 134 with a bolt 144 or the like, the movable guide rail 130 a can be moved back and forth in conjunction with the movement of the nut housing 134. The operation unit 160 has an operation shaft 151 integrally connected to the screw shaft 141, and the front end portion of the operation shaft 151 protrudes from the front surface of the operation unit box 150. When the lower decorative panel 112 is opened, the operation handle 152 can be attached to the front end portion of the operation shaft 151.

  Next, an operation when the glass plate 102 is moved back and forth manually will be described. As described above, since it is assumed that the ball screw 135 is not locked, first, when the power of the door opening / closing device 5 is in the off state, or the power of the door opening / closing device 5 is not turned on due to a power failure or the like, Confirm that the motor 28 cannot be used. Then, after confirming that the ball screw 135 is not locked, a flap door (not shown) and a lower makeup similar to those of the first embodiment are taken from the closed position where the glass plate 102 and the glass plate 103 are flush with each other. The panel 112 is opened so that the operation unit 160 appears. The operation handle 152 is inserted into the operation shaft 151 and turned in a predetermined direction (for example, clockwise), thereby rotating the screw shaft 141. As a result, the nut housing 134 moves forward, and a moving body (not shown) of a linear guide (not shown) similar to that of the first embodiment moves forward on the lower rail similar to that of the first embodiment. Then, in a state where the door roller 126 and the guide roller similar to the first embodiment are placed on the movable guide rail 130a, the glass plate 102 and the hook part 124 are moved together with the movable guide rail 130a. Become.

  At this time, when the glass plate 102 and the movable guide rail 130a move to the front position of the front side movement end, the end of the rear row of the movable guide rail 130a matches the end of the front row of the adjacent fixed guide rail 130b. Subsequently, the suction handle or the like is attached to the glass plate 102, pulled forward, and moved to the same guide rail as that of the first embodiment on the side of the glass plate 103, thereby opening the opening 4 as in the first embodiment. It can be in an open state.

  On the other hand, when closing the opening 4 in the open state with the glass plate 102, the reverse operation is performed to move the glass plate 102 to the original front position, and with the suction handle or the like, as in the first embodiment, And press the upper part against the magnet catch. Thereafter, the operating handle 152 is inserted into the operating shaft 151 and rotated in the opposite direction (for example, counterclockwise) to the opening operation, thereby rotating the screw shaft 141 and moving the nut housing 134 rearward. The moving body of the linear guide similar to that of the first embodiment is moved rearward on the same lower rail. As a result, the glass plate 102 and the hook section 124 are moved backward together with the movable guide rail 130a in a state where the door roller 126 and the same guide roller as in the first embodiment are placed on the movable guide rail 130a.

  At this time, the fixing bracket similar to the first embodiment provided on the upper part of the glass plate 102 is attracted to the magnet catch of the upper base frame similar to the first embodiment. Then, when the flap door 120 and the lower decorative panel 112 are closed, the upper and lower surfaces of the glass plate 102 are stopped by the respective buffer members 122 and 132 and returned to the closed position.

  Even when the display case 200 is provided with the door opening and closing device 105 in the present embodiment described above, the same effects as those described in the first embodiment can be obtained. Furthermore, the glass plates 102 and 103 can be easily opened and closed even during a power failure.

  Thus, the above-described embodiment disclosed herein is illustrative in all respects and is not restrictive. The technical scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims. For example, the door opening / closing device 5 may be replaced by a configuration using only manual driving means as driving means.

  In the first and second embodiments, when the ball screw on the lower side of one glass plate is operating or the guide rail is in front, the control is performed by the control device so that the ball screw on the other glass plate does not operate. Also good.

  Further, the above-described limit switch is a contact type detection device, but may be a non-contact type detection device (for example, an infrared sensor).

  In the first and second embodiments, the lower portion of the glass plate is moved by a ball screw, a guide rail, a linear guide, etc., but the same ball screw, guide rail, and linear guide are provided on the upper portion of the glass plate. And it is good also as a structure which can move a glass plate to the front-back direction by fully automatic.

DESCRIPTION OF SYMBOLS 1,101 Display case main body 2,3,102,103 Glass plate 4,104 Opening part 5,105 Door opening / closing device 6 Exhibition space 7 Upper base frame 8,108 Lower base frame 9 Upper support mechanism 10 Lower support mechanism 11 Upper makeup Panels 12 and 112 Lower decorative panels 13 and 48 Upper rails 14 and 49 Auxiliary rails 15 Rollers 16 Suspension brackets 17 Fixing brackets 18 Shim members 19 Magnet catches 20 and 120 Flap doors 21 and 31 Hinges 122 and 22 Buffer members 23 Open catches Portion 24, 124 Hack portion 25 Support plate 25a Slit 26, 126 Door wheel 26a, 27a Support shaft 27 Guide roller 28 Motor 30, 40, 130, 140 Guide rail 30a, 40a, 130a, 140a, 140b Movable guide rail 30b, 130b Fixed Guide rails 32 and 132 Buffer member 33 133 Linear guide 34, 134 Nut housing 35, 135 Ball screw 36, 136 Lower rail 37, 137 Moving body 38, 138 Screw shaft support member 39 Stopping portion 41, 141 Screw shaft 42 Transmission portion 43, 44, 143, 144 Bolt 45 Wiring cable 46 Limit switch 46a Switch unit 47 Actuator 47a Leaf spring unit 47b Roller 50, 150 Actuator box 51 Locking tool 53, 54 Lid 60, 160 Operation unit 100, 200 Display case 151 Operation shaft 152 Operation handle

Claims (5)

A case body, and a plurality of door plates mainly composed of a transparent rigid body disposed at a position where the front opening of the case body is flush with the closed position, and one of the adjacent door plates is In the display case, after moving in any direction, by continuously moving in the width direction, the front panel of the case body can be opened by superimposing the door panel on an adjacent door panel,
A guide rail capable of placing one of the door plates movably in the width direction;
A ball screw mechanism that is coupled to the lower portion of the guide rail and guides the guide rail to be movable in the front-rear direction in a state where one of the door plates is placed;
A guide mechanism that is coupled to the lower portion of the guide rail and supports the guide rail so that it can be guided in the front-rear direction in accordance with the operation of the ball screw mechanism;
A door opening and closing device for an exhibition case, further comprising: A drive unit capable of driving the ball screw mechanism;
A switch unit for turning on and off power supply from a power source to the drive unit;
A handle portion that can be attached to the front side of the case body in the ball screw mechanism and can manually operate the ball screw mechanism;
Further comprising
When the switch unit is in the on state, the handle unit is locked so that the operation by the handle unit cannot be performed, and when the switch unit is in the off state or when power is not supplied to the switch unit in the power failure state, The display case door opening and closing device according to claim 1, further comprising a lock mechanism that is unlocked and can be operated by the handle portion. A drive unit capable of driving the ball screw mechanism;
A switch unit for turning on and off power supply from a power source to the drive unit;
A detection unit for detecting that one of the door plates has moved in the width direction;
Further comprising
The detection unit is capable of outputting an off signal for turning off the switch unit when it is detected that one of the door plates has moved in the width direction.
The display case door opening and closing device according to claim 1, wherein the switch unit cuts off power supply from the power source to the driving unit when receiving the off signal.   The dust-proof member which protects the said ball screw mechanism in the state which the said guide rail can move to the front-back direction between the said guide rail and the said ball screw mechanism is provided. The door opening and closing device for the display case according to item 1. The dust-proof member which protects the said guide mechanism in the state which the said guide rail can move to the front-back direction between the said guide rail and the said guide mechanism is provided. The door opening and closing device for the display case according to item 1.

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