JPH0540770Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an exhibition case for displaying works of art and making them available for viewing in museums, art galleries, etc.

[Prior Art] This type of exhibition case is constructed by hinged the rear part of the top lid with a glass plate attached to the lid frame to the case body, and the center of gravity of the top lid is lower than the hinge position. A top-opening type is known that can be opened and closed from a fully closed position to a fully open position higher than the hinged position. In many of these display cases, a gas spring is interposed between the top cover and the case body in a backwardly inclined position so that the top cover can be opened and closed safely and smoothly. That is, in this case, the tip of the gas spring is pivotally attached to the lower surface of the top cover, and the base end is pivoted to the case body, so that the repulsive force in the direction of extension of the gas spring is opposed to the gravity of the top cover. .

By the way, with such a configuration, the rotational moment of the top lid in the closing direction due to gravity increases as the top lid is rotated from the fully open position to the closing direction, and the center of gravity of the top lid moves toward the butterfly of the top lid. It reaches its maximum at the same height as the landing position. Then, when the upper cover is rotated beyond that position to the fully closed position, the rotational moment gradually decreases. On the other hand, the power factor for biasing the upper cover in the opening direction by the gas spring is maximum at a position where the upper cover is opened and the lower surface of the upper cover is perpendicular to the axis of the rearwardly tilted gas spring. Then, as the top cover is rotated in the closing direction and the extension of the axis of the gas spring approaches the hinged position of the top cover, the power factor gradually decreases and becomes minimum at the fully closed position. In addition, the characteristics of the gas spring itself are that the repulsive force changes less than metal coil springs, etc. Even when it is fully extended, the repulsive force does not decrease drastically, and even when it is compressed and shortened, the repulsive force increases significantly. Never. By using the above characteristics in combination, in the fully open position, the gas spring is fully extended and the top cover is held in that position, while in the fully closed position, the repulsive force of the gas spring overcomes the gravity acting on the top cover and the top cover is held in that position. can be set so that it is stably held in the closed position.

With this setting, the top cover can be automatically stopped at the fully open position, making it easy to perform maintenance in the exhibition space, take in and take out exhibits, etc. On the other hand, when the top lid is fully closed, the top lid is stably held in the fully closed position by its own weight, making it possible to keep the exhibition space hermetically sealed without using a lock with a retractable function. This is the most desirable condition for this type of display case.

[Problem that the invention aims to solve] However, in order to set up such a power relationship,
It is necessary to delicately set the weight of the top lid, the repulsive force of the gas spring, or the angle at which the gas spring force acts on the top lid.

However, this type of display case uses a large area and thick glass for the top lid for visibility and security reasons, so even slight errors in glass thickness can cause the weight of the top lid to be relatively low. The targets vary widely. Furthermore, there are some variations in the repulsive force of the gas spring. Therefore, if the base end of the gas spring is simply pivoted at a certain position on the case body, it is possible to obtain the ideal top cover support characteristics for some products as described above, but for some products, the This results in a defective product that has the characteristic that the top lid tends to open even in the closed position, or the top lid tends to close even in the fully open position.

The primary purpose of the present invention is to eliminate such problems.

Furthermore, the production volume of display cases for works of art and the like is much smaller than that of furniture used in homes, offices, and the like. Therefore, it is necessary to use common parts as much as possible for various display cases with different display dimensions (horizontal dimensions). For this reason, there is a desire to standardize the side plate of the case body, which includes the gas spring mechanism, for various specifications, but the weight of the top lid changes significantly if the display dimensions differ. Therefore, if the side plate including the gas spring mechanism is made common, a major problem becomes how to ensure the above-mentioned ideal top lid support characteristics.

The present invention aims to solve such problems as well.

[Means for Solving the Problems] In order to achieve the above object, the present invention takes the following measures.

That is, the display case for works of art, etc. according to the present invention has a rear edge of the upper lid with a glass plate attached to the lid frame hinged to the rear edge of the upper surface of the case body, and the upper lid is centered at the center of gravity of the upper lid. The lid frame is configured so that it can be opened and closed between a fully closed position where it is lower than the hinge position and a fully open position where it is higher than the hinge position, and the lid frame is in contact with the top surface of the side plate of the case body in the fully closed position. In the top-opening type, a retractable gas spring that supports the top cover is installed in the side plate of the case body in a backward-tilting position, and a through hole is provided on the top surface of the side plate to allow the gas spring to move in and out. The tip of the gas spring is pivotally attached to the lower surface of the lid frame of the upper lid, and the base end is pivoted to the case body, and the base end pivot position of the gas spring is changed steplessly in the front and back direction according to the adjustment operation. The present invention is characterized in that it is provided with a pivot position adjustment mechanism that maintains the pivot position at the changed position upon completion of the adjustment operation.

[Function] With this configuration, it becomes possible to change the pivot position of the base end of the gas spring in the case front-rear direction and hold it at the changed position.
For example, if the left-right dimension (weight) of the top cover is large, change the pivot position of the base end to the rear of the case, and conversely, if the left-right dimension (weight) is small, change it to the front of the case. Additionally, the angle of action of the gas spring relative to the top cover can be adjusted as appropriate. As a result, even if the side plate of the case body with the gas spring installed therein is made common to display cases of various display sizes, it is possible to ensure the optimal top cover support characteristics as described above.

In addition, when focusing on manufacturing a single type of display case, as mentioned above, if the upper lid support balance is slightly disrupted due to variations in glass thickness or variations in the repulsive force of the gas spring, etc. If so, it can be corrected. That is, in the device of the present invention, the base end pivot position of the gas spring can be changed steplessly and the position after the change can be maintained. Therefore, the influence of variations in the weight of the top cover, variations in the repulsive force of the gas springs, etc. can be absorbed by stepless correction of the backward tilt angle of the gas spring, and the above-mentioned optimal top cover variation state can be restored. Therefore, the rate of occurrence of defective products can be significantly reduced.

In addition, if a gas spring is installed inside the side plate and the upper surface of the side plate is hidden by the frame of the top lid as in the present invention, unnecessary gaps and the like will not enter the viewer's field of view. Therefore, it is possible to provide a high-class exhibition space, which is suitable for displaying works of art and the like.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

1 to 3 show one embodiment. The display case here is of the top-opening type, as shown in FIGS. 2 and 3, respectively, when the display case is closed and opened. This exhibition case consists of a case body 1 and a top lid 2.
is hinged to the rear edge of the upper surface of the case body 1 with a hinge 3 so that it can be opened and closed. However, this thing is
As is clear from FIG. 1, the top cover 2 is moved from the fully closed position (see solid line) where the center of gravity g of the top cover 2 is lower than the hinge position h (see solid line) to the fully open position (imaginary line) where the center of gravity g of the top cover 2 is higher than the hinge position h. ), and the lid frame 14 of the upper lid 2, which will be described later, comes into contact with the upper surface of the side plates 6, 6 of the case body 1 in the fully closed position.

The case body 1 has a rectangular upper frame 4 and a lower frame 5 fixed to pillars (not shown) erected at the four corners, side plates 6, 6 at both side openings, and a front panel 7 at the front and rear openings. and a rear panel 8, respectively, and are assembled into a hollow box body. Then, on the inner periphery of the inner frame 9 provided around the upper frame 4,
An exhibition floor 10 is provided on which exhibits such as works of art are placed and displayed. This exhibition floor 10 partitions an exhibition space 11 above it from a base space 12 below. Note that a decorative panel 13 is pasted on the back side of the exhibition space 11 that forms the background of the exhibits. Further, the base space 12 formed under the exhibition floor 10 is designed so that the front side thereof can be opened by opening the front panel 7 whose lower edge is hinged as an opening/closing door.

The side plates 6, 6 are each formed into a hollow body having an appropriate thickness in the longitudinal direction at least in the portion above the exhibition floor 10 surrounding the exhibition space 11. Specifically, it is configured by consecutively arranging an outer plate 6a, an inner plate 6b, an upper plate 6c, and a front plate 6d.

On the other hand, the upper lid 2 is made up of a lid frame 14 assembled into a rectangular hollow frame, and a transparent glass plate G attached to the inner peripheral edge of the lid frame 14 with an edge placed thereon. The lid frame 14 is made up of a rear side 14a, side sides 14b, 14b, and a front side 14c, and both sides 14b have side-bent shapes corresponding to the top plate 6c and front plate 6d of the side plate 6. is forming. Thus, when the top lid 2 is closed, the rear side 14a of the lid frame 14 contacts the top surface of the case body 1, the same side side 14b contacts the top plate 6d of the side plate 6, and the front side 14c contacts the inside. Frame 9
are in close contact with the front surfaces of each through seals (not shown) to airtightly close the exhibition space 11. In addition,
The glass plate G affixed to the lid frame 14 is formed into a single piece with the joint surfaces of its upper surface and front surface rigidly connected.

In such a top-opening display case, the top lid 2
In order to open and close the case body 1 in a cantilevered manner, a gas spring 15 is attached to one longitudinal end of the case body 1 to function as a balancer. and,
In this case, the gas spring 15 is mounted inside the side plate 6, as shown in FIG. 1, in order to hide its presence from the exhibition space 11 while the case is sealed.

The gas spring 15 has a cylinder portion 15a at the base end and a telescopic rod portion 1 at the tip end.
5b, and is attached within the side plate 6 as follows.

The lower end of the cylinder portion 15b, that is, the base end of the gas spring 15, is connected to a nut member 17 that is screwed into a screw 16 disposed in the side plate 6 in the longitudinal direction of the case.
It is pivotally supported by a mounting bracket 17a. The screw 16 is rotatably supported by bearings 19 and 20 fixed to a support plate 18 that is horizontally suspended within the side plate 6, but cannot move forward or backward. A bevel gear 21 is connected to the front end of the screw 16, and an operating shaft 24 with a handle 23 extends from the bevel gear 22 cross-meshed with the bevel gear 22 into the base space 12 below. The pivot position s of the base end of the gas spring 15 can be operated by the screw 16, nut member 17, nut member mounting bracket 17a, bearings 19, 20, bevel gears 21, 22, handle 23, and operating shaft 24. Accordingly, a pivot position adjustment mechanism 40 is constructed which changes the pivot position s steplessly in the front-back direction and maintains the pivot position s at the changed position upon completion of the adjustment operation.

On the other hand, the upper end of the rod portion 15b is attached to the mounting bracket 25.
It is pivotally attached to the lid frame side portion 14b of the upper lid 2 via. The top plate 6c of the side plate 6 comes into contact with the side portion 14b of the lid frame near the mounting bracket 25.
There is an elongated through hole 26 into which the metal fitting 25 is inserted.
is provided so that the rod portion 15b of the gas spring 15 can freely move in and out while swinging through the through hole 26 when the upper cover 2 is opened and closed.

With such a configuration, the top cover 2 is
When the rod portion 1 of the gas spring 15 is closed from the fully open position shown in the imaginary line in the figure and in FIG.
5b retracts into the through hole 19, and finally sinks into the side plate 6 together with the mounting bracket 25 attached to the side part 14b of the lid frame, and the lid frame 14 comes into contact with the side plate top plate 6c, etc. In this way, the exhibition space 11 is completely sealed. In this case, in the vicinity of the fully open position where the closing force due to the weight of the top lid 2 is small and the power factor for supporting the top lid by the gas spring 15 is high, the top lid 2 will open naturally when you release your hand; In the vicinity of the fully closed position, where the closing force due to the weight of the lid 2 is relatively large and the power factor of supporting the top lid by the gas spring 15 is low, the top lid 2 is designed to close naturally when you release your hand. is ideal. If such ideal characteristics cannot be obtained and, for example, the top cover falls down by itself even in the fully open position, operate the handle 23 in one direction to rotate the screw 16 and remove the gas. The base end pivot position s of the spring 15 is moved rearward to return to the ideal state. Note that when the operation is stopped, the pivot position s becomes immovable due to the self-locking function of the screw 16, and is maintained at that position no matter how the upper cover 2 is opened or closed. On the other hand, if the top cover opens naturally even in the fully closed position, the handle 2
3 in the other direction to reversely rotate the screw 16 and move the base end pivot position s of the gas spring 15 forward to return it to its ideal state. Therefore, even when manufacturing display cases of the same standard, even if there are variations in the thickness of the glass G or the repulsive force of the gas spring 15, it is possible to ensure that all products have appropriate top cover support characteristics with simple operations. It becomes possible to

In addition, with such a configuration, even if the horizontal dimension l of the display case changes and the length dimension of the top lid 2, that is, the weight changes accordingly, the action angle of the gas spring 15 with respect to the top lid 2 will not change. θ can be adjusted optimally. Therefore, even if the side plate 6 in which the gas spring 15 and the pivot position adjustment mechanism 40 are installed is made into a common unit for display cases of various specifications with different horizontal dimensions l, the display cases of each specification can be optimized. It becomes possible to set the state.

Also, in this case, the gas spring 15 is connected to the side plate 6.
At the same time, the opaque lid frame 14 of the upper lid 2 is brought into contact with the upper surface of the side plate 6 to close the upper lid 2, so that complicated mechanisms and unnecessary joints are not visible to viewers during exhibition. There are no lines, etc., making it possible to display a high-class display.

Note that the details of the mounting structure of the gas spring 15 and the pivot position adjustment mechanism on the proximal end side are, of course, not limited to the illustrated embodiment. FIG. 4 shows another embodiment. In this case, a guide piece 28 is provided on the support plate 27 of the side plate 6 to form a sliding groove in the front-rear direction of the case, and a long hole 29 opened in the guide piece 28 is provided. A wing nut 30 is tightened to the lower end of the cylinder 15a of the gas spring 15 inserted into the through slide groove to pivot it, and the base end side of the gas spring 15 is also steplessly adjusted to the adjusted position. It is designed to be retained.

[Effects of the invention] Since the present invention has the above-mentioned configuration, even if there are variations in the thickness of the glass or the repulsive force of the gas spring, the base end pivot position of the gas spring can be slightly changed to hold the gas spring. As a result, the support characteristics of the top cover can be set to the above-mentioned optimal state, and the optimal state can be maintained thereafter.

Furthermore, even if the side plate with internal gas spring and pivot position adjustment mechanism is made into a common unit for display cases with various specifications with different left and right width dimensions,
It becomes possible to set the display cases of each specification in the optimal condition.

Furthermore, in this invention, the gas spring and the pivot position adjustment mechanism are housed inside the side plate, and the opaque lid frame of the top cover is brought into contact with the top surface of the side plate to close the top cover, so that it can be displayed easily. This eliminates the need for complicated mechanisms or unnecessary joint lines to be seen by viewers, and provides a sophisticated exhibition space suitable for displaying works of art.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention. FIG. 1 is a sectional view of the case side plate, FIG. 2 is a perspective view of the entire case when the top cover is closed, and FIG. 3 is a perspective view of the case when the top cover is open. FIG. 4 is a sectional view of a side plate showing another embodiment. 1...Case body, 2...Top lid, 6...Side plate,
6c...Top plate, 14...Lid frame, 14b...
...Lid frame side part, G...Glass plate, 15...Balancer, 15a...Cylinder part (base end), 15b
... Rod part (tip part), 16 ... Screw,
17... Nut member, 17a... Mounting bracket, 18
...Support plate, 19,20...Bearing, 21,22...
...Bevel gear, 23...Handle, 24...Operation shaft, 25...Mounting bracket, 26...Through hole, 27...
...Support plate, 28...Guide plate, 29...Elongated hole, 3
0...wing nut, 40...pivot position adjustment mechanism, g
...center of gravity, h...hinge position, s...pivot position.

Claims (1)

[Scope of utility model registration request] The rear part of the top cover with a glass plate attached to the lid frame is hinged to the rear edge of the top surface of the case body, and the top cover is hinged from the fully closed position where the center of gravity of the top cover is lower than the hinge position. In a top-opening display case that is configured to be able to be opened and closed between a fully open position and a fully closed position, the lid frame touches the top surface of the side plate of the case body in the fully closed position. A retractable gas spring that supports the top lid is installed inside the gas spring in a backwardly tilted position, and a through hole is provided on the upper surface of the side plate to allow the gas spring to appear and retract, and the tip of this gas spring is pivotally attached to the bottom surface of the lid frame of the top lid. , the base end of the gas spring is pivoted to the case body, and the base end pivot position of the gas spring is steplessly changed in the front and rear direction according to the adjustment operation, and the pivot position is changed upon completion of the adjustment operation. An exhibition case for works of art, etc., characterized in that it is provided with a pivot position adjustment mechanism to hold the works in the position shown in FIG.