JP2000312634A - Opening and closing device for upper lid of showcase - Google Patents

Abstract

PROBLEM TO BE SOLVED: To start opening an upper lid to be turned upper backward for opening/closing an opening part on the upper surface of a body of showcase with a light force. SOLUTION: A vertically and longitudinally long first balancer 24 for energizing an upper lid 3 upward at the front position of a hinge 17 as the pivotal turning point of the upper lid 3 and a horizontally long second balancer 33 for energizing the upper lid upper backward at the front position of the first balancer 24 are arranged on inner surface sides at both the left and right side parts of a body 1. Since the arm of the rotary moment of the first balancer 24 is longer than that of the second balancer 33, even when the first balancer 24 is the gas spring of small energizing power, the upper lid 3 can be efficiently pushed up with a light operating force against the rotary moment of dead weight.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a showcase for displaying goods in a store or exhibiting goods in a museum or art museum. The present invention relates to a structure for opening and closing with an upper lid attached to a rear end portion of a main body so as to rotate up and down.

[0002]

2. Description of the Related Art As a device of this type, Japanese Utility Model Registration No. 3008753 discloses a rectangular box-shaped display case in which the upper opening is covered with a transparent upper lid that can be opened and closed upward and backward. The upper part of the display case body is made opaque, and a concave groove is formed on the upper surface of the left and right side plates of the display case body.The upper lid is placed between the inner front end of the concave groove and the rear parts on both sides of the upper lid. A configuration in which a balancer (gas spring) biasing upward is provided is disclosed.

[0003]

However, when the upper lid is closed, when the display case is viewed from the side, the line of action of the rearward biasing force of the balancer passes near the upper side of the rotation fulcrum at the rear end of the upper lid. In other words, the length of a straight line that intersects the rotation line at right angles to the action line, that is, the arm length of the rotation moment by the balancer with respect to the rotation fulcrum becomes extremely short, so that the upper lid is opened. However, there is a problem in that the force required in a section where the operator lifts the front end side of the upper lid becomes large, and the upper lid cannot be opened with a light force. The only solution to this problem is to change the mounting position of the balancer or to increase the rear upward inclination angle of the upper edge of the main body so that the arm length becomes longer when the upper lid is closed. Form (height dimension)
There is a problem that becomes large.

In addition, as the front end of the upper lid rotates upward and backward, the arm length gradually increases, and the arm length is maximized when the upper lid is fully opened (when fully open). Even when the pressing force on the upper lid is the same, the rotational moment is maximized, a large impact force acts on the upper lid, and a large amount of force is applied to the hinge parts, etc., which are the pivots of the upper lid, and the mounting state of these parts In addition, there is a problem that these parts are easily damaged.

SUMMARY OF THE INVENTION The present invention has been made to solve these conventional problems, and can open the upper lid with a light force, prevents an impact force when fully opened, and does not impair the appearance. It is another object of the present invention to provide a compact opening / closing device for an upper lid of a showcase.

[0006]

According to a first aspect of the present invention, there is provided an opening / closing device for an upper cover of a showcase according to the first aspect of the present invention. In the opening / closing device for the upper lid of the showcase, which is configured to be opened and closed by the upper lid that rotates, the inner surface side of the left and right sides of the main body is located at a position forward of the rotation pivot point of the upper lid. An upper and lower vertically long first balancer for urging the upper lid upward, and a front and rear longitudinal second balancer disposed at a position forward of the first balancer and urging the upper lid rearward and upward are arranged.

[0007] The invention described in claim 2 is the first invention.
In the opening / closing device for the upper lid of the showcase described in (1), a downward open side member that surrounds the second balancer from above when the upper lid is closed is provided on both left and right sides of the lower surface of the upper lid.

According to a third aspect of the present invention, there is provided the opening / closing device for the upper lid of the showcase according to the first or second aspect, wherein the opening / closing device is provided with a slide means capable of moving up and down an appropriate distance from the main body. A base end of each of the first balancers is mounted.

Further, according to a fourth aspect of the present invention, in the opening / closing device of the upper lid of the showcase according to any one of the first to third aspects, the base end of each of the first balancers is provided with the upper lid fully opened. The shock absorber of the present invention is provided with a shock absorbing means.

[0010]

Next, embodiments of the present invention will be described.

FIG. 1 is a perspective view showing a state in which the upper lid 3 of the main body 1 of the showcase placed on the storage box 2 is closed.
FIG. 2 is a perspective view of a state where the upper lid 3 is widely opened with respect to the main body 1.

The housing box 2 is provided with a double-opening door 4, 4 which can be opened and closed by a conventionally known structure via a hinge (not shown) on the front side thereof.

Next, the structure of the showcase will be described. The main body 1 of the showcase is in the form of an upwardly open box having a substantially rectangular shape in a plan view, with an upper surface inclined forward and downward and an open front surface, and the left and right sides of a rear frame 5 of the main body 1. Then, side frames 6 and 6 are erected, and a transparent or opaque back plate 7 made of a metal plate, a glass plate, or a plastic plate is attached to the back frame 5. The side frame 6 includes, in a side view, an inclined member 10 whose front portion is inclined forward and downward between the upper ends of the lower front strut portion 8 and the higher rear strut portion 9, and a substantially horizontal member 11 on the back side thereof.
And the lower end of the front and rear support portions 8 and 9 are connected by a horizontal member 12 to form a frame shape. The post 8,
9, the inclined member 10 and the horizontal member 12 are each formed of a hollow member having a rectangular cross section made of metal.

A transparent or opaque side plate 13 made of a glass plate or a plastic plate is attached to the outer surface of each side frame 6 via a packing, a sealing material or a cushion material. At the bottom of the main body 1, a floor plate 14 for placing an exhibit is laid.

The upper cover 3 comprises a metal frame 15 formed along the upper surface of each side frame 6 and a transparent glass plate 16 attached to the upper surface of the frame 15. The rear end of the frame 15 is attached to the upper end of the rear frame 5 via a hinge 17 so as to be pivotable upward and backward. A horizontally long plate-like auxiliary lid 20 is mounted on the upper surface of the frame frame 15 near the rear so as to be rotatable upward and rearward via an auxiliary hinge 21. The lower surface of the auxiliary lid 20 has a fluorescent lamp or the like. (See FIGS. 2, 3 and 4). Therefore, the lighting device 22 can be replaced by opening only the auxiliary cover 20 without opening the upper cover 3 (see the solid line state in FIG. 1 and the two-dot chain line state in FIG. 3).

In order to efficiently perform an upward urging action between the lower surface of the portion from the base end of the upper lid 3 and the bracket 25 attached to the rear frame 5 or the side frame 6 in the section where the upper lid 3 starts to open. The left and right pair of first balancers 24, 24 are mounted. In this case, the first balancer 24 is a conventionally known gas spring, and its upper end is pivotally attached to a bracket 26 fixed to the lower surface of the frame 15 of the upper lid 3. The lower end of the first balancer 24 (for example, the tip of a piston rod) is configured to be able to move up and down on the bracket 25 via a slide means.
As one specific example, as shown in FIG. 4, a pin 27 protruding from a mounting bracket 24a at the lower end of each first balancer 24 is inserted into a vertically long slot 28 formed in the bracket 25 to move up and down. It is movable.

Further, by connecting the lower end of a tension spring 29, one end of which is connected to the mounting bracket 24a, to the bracket 25, the first balancer 24 is urged so as to always be pulled downward. The pin 27 is configured to function as a buffer means that can reduce an impact when the pin 27 hits the upper end edge of the vertically long slot 28 by the upward movement.

A pair of left and right first balancers 24, 2
Reference numeral 4 denotes a balancer 24, a bracket 25, and a tension spring 2
If the parts such as 9 are left exposed, they can be seen through the transparent side plate 13 and the glass plate 16 in the upper lid 3, which impairs the aesthetic appearance. To prevent it,
A cover body 30 made of an opaque material (a metal plate or a synthetic resin material) having an open top surface is provided on the inner corner of the side frame 6 and the back frame 5 so as to surround the side of the first balancer 24 and the lower part thereof. Place and fix. Further, in order to irradiate the light from the lighting device 22 to the exhibit on the floor plate 14 of the main body 1 and to hide the lower surface side of the lighting device 22, a partition wall is provided between the left and right cover bodies 30, 30. The plate 31 is arranged in an inclined manner, and a light transmitting plate 32 such as a ground glass plate is stretched in a hole formed in the partition plate 31.

The proximal ends (front ends) of the pair of left and right second balancers 33 for urging the upper lid 3 upward and rearward are pinned to the bracket 34 at a portion of the side frame 6 near the upper surface of the inclined member 10. Being pivoted.

The front end (rear end) of the second balancer 33 is connected to the right and left side members 35, 35 (35) of the frame 15 of the upper lid 3 which are formed of a metal shape or the like that is open in a downward U-shaped cross section. (Only one of them is shown in FIGS. 3 to 5). When the upper lid 3 is closed with respect to the upper surface of the main body 1, the lower surfaces of the left and right members 35, 35 are formed so as to be arranged in parallel and close to the upper surface of the inclined member 10 of the side frame 6. Therefore, each of the second balancers 33 is hidden by each of the side members 35, so that the aesthetic appearance of the showcase is not impaired, and the display effect is not impaired.

The length of a line segment extending perpendicular to the hinge 17 from the line of action of the force by the second balancer 33 (the straight line connecting the pivot points with the brackets 34, 36) (the rotational moment by the second balancer 33). As can be understood from FIG. 3, the arm length is the shortest when the upper lid 3 is closed, and is shorter than the line of action of the force by the first balancer 24 (the straight line connecting the pivot point of the bracket 26 and the pin 27). And is set shorter than the length of the line segment extending perpendicularly from the hinge 17 (the arm length of the rotational moment by the first balancer 24).
The arm length of the rotational moment by the second balancer 33 is set to gradually increase as the upper lid 3 rotates upward (in proportion to the opening angle of the upper lid 34 being not large).

When the upper lid 3 is closed, in order to ensure airtightness between the lower surface of the frame frame 15 and the upper surface and the front surface of the side frame 6, the upper surface and the front surface of the side frame 6 are made of soft rubber. The sealing member 37 is stretched. Further, a handle 39 is attached to the front end side of the upper lid 3 to facilitate lifting work of the front end side of the upper lid 3. Further, in order to keep the upper lid 3 closed, the locking piece 40 provided at the front end of the upper lid 3 can be engaged and disengaged by a kick engagement claw 41 provided at the lower end of the main body 1. (See FIG. 3).

According to the above configuration, the rotation moment of the first balancer 24 in the initial section in which the operator rotates upward with the handle 39 from the state in which the upper lid 3 is closed with respect to the upper opening of the main body 1. The arm length of the first balancer 24 is longer than that of the second balancer 33.
Even if is a gas spring having a small urging force, the upper lid 3 can be efficiently pushed upward by a light operating force against the rotational moment due to its own weight. As the opening angle of the upper lid 3 gradually increases (see the solid line state from the state of the two-dot chain line in FIG. 5), the action of the clockwise rotational moment in FIG. It is also possible to rotate the upper lid 3 largely rearward and upward, and hold the open position at an arbitrary position in balance with the rotational moment due to the weight of the upper lid 3.

Also, a bracket 2 as a slide means
Since the pin 27 is slidable along the upper and lower slots 28, the full open angle of the upper lid 3 can be set large even if the first balancer 24 is short.

Further, since the lower end of the first balancer 24 is constantly urged downward by the tension spring 29, the upper cover 3 is turned in the opening direction by the second balancer 33 in the vicinity of the maximum opening position (when fully opened). The tension spring 29 as a buffering means reduces or prevents the pin 27 at the lower end of the second balancer 24 from impacting the upper edge of the vertically long slot 28 of the bracket 25 due to a large dynamic moment. When the upper lid 3 is fully opened, a loud impact sound is generated, and an impact force is applied to the brackets 25 and 26 and the hinge 17 to cause looseness or breakage of the mounting state of these parts. Can be eliminated.

The first balancer 24 and the second balancer 24 are formed by connecting a plurality of showcases in a row in a state where the portions where the side plates 13 of the showcase 13 are removed are in contact with each other.
The oblong display can be stored without the presence of the balancer 33 being in the way.

[0027]

As described above in detail, the opening / closing device for the upper lid of the showcase according to the first aspect of the present invention rotates the upper opening of the main body of the substantially rectangular box-shaped showcase rearward and upward. In the opening / closing device of the upper lid of the showcase configured to be opened and closed by the upper lid, the upper lid faces upward on the inner surface sides of the left and right sides of the main body at a position forward of the pivot point of the upper lid. And a vertically-long first balancer that urges the upper lid and a second longitudinal balancer that is disposed at a position forward of the first balancer and urges the upper lid rearward and upward.

As described above, the two balancers in the up-down direction and the front-rear direction with respect to the upper lid can balance the rotational moment of the upper lid and the moment due to the weight (own weight), and can also be used in the section where the upper lid starts to open. When the moment due to the weight of the upper lid is large, the first balancer can efficiently exert the effect, and thus the upper lid can be opened lightly.

[0029] The invention described in claim 2 is the same as that in claim 1.
In the opening and closing device of the upper lid of the showcase described in the above, since the left and right sides of the lower surface of the upper lid are provided with downward-opening side members that surround the second balancer from above when the upper lid is closed, When the upper lid is closed, at least the upper side and the side surface along the longitudinal direction of the second balancer are hidden by the side members, so that the appearance is not impaired and the display effect is not impaired. Further, at the time of closing, as a result of the second balancer being stored within the height of the side member in the frame supporting the upper lid, the arrangement height of the upper lid with respect to the main body of the showcase can be reduced. In addition, the height of the entire showcase can be reduced without reducing the volume of the exhibition space, so that the display case can be formed compact.

According to a third aspect of the present invention, there is provided the opening / closing device for the upper lid of the showcase according to the first or second aspect, wherein the apparatus is provided with a slide which can be moved up and down an appropriate distance with respect to the main body. The base end of each first balancer is mounted.

With this configuration, the opening angle of the upper lid can be increased even if the first balancer has a short length.

Further, the invention according to a fourth aspect is the opening / closing device for the upper lid of the showcase according to the first to third aspects, wherein a base end of each of the first balancers is provided when the upper lid is fully opened. Since the second balancer is provided with a shock absorbing means to reduce the impact of the second cover, a force is applied in the full opening direction, and the second balancer is attached to the mounting member between the second balancer and the main body and the upper lid, and the upper lid itself is not attached to the main body. The impact force acting on the pivoting parts can be reduced or prevented, and a loud impact sound is generated when the upper lid is fully opened, or the impact force acts on the mounting parts, and these parts are affected. This has a remarkable effect that it is possible to eliminate the problem of rattling or breakage of the mounting state.

[Brief description of the drawings]

FIG. 1 is a perspective view of a showcase with an auxiliary opened.

FIG. 2 is a perspective view of the showcase with an upper lid opened.

FIG. 3 is an enlarged side sectional view taken along line III-III of FIG. 1;

FIG. 4 is an enlarged side sectional view taken along line IV-IV of FIG. 3;

FIG. 5 is an enlarged side sectional view showing a state in which an upper lid is opened.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 3 Top cover 6 Side frame 15 Frame frame 16 Glass plate 17 Hinge 22 Illumination tool 24 First balancer 25 Bracket 27 Pin 28 Vertical slot as sliding means 29 Tension spring as relaxation means 33 Second balancer 35 Opening downward Side member

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Fumio Tanaka, Inventor Itofukurebio, 1-4-1-12, Imafukuhigashi, Joto-ku, Osaka F-term (reference) 3B110 FA01 GA21 JA25

Claims (4)

[Claims] 1. An opening / closing device for an upper lid of a showcase, wherein the upper opening of the main body in a substantially rectangular box-shaped showcase is opened and closed by an upper lid rotating upward and backward. On the inner surface side of both sides, a vertically elongated first balancer that biases the upper lid upward at a position forward of the pivot point of the upper lid, and an upper lid that is disposed at a position forward of the first balancer. An opening / closing device for an upper lid of a showcase, comprising a front and rear longitudinal second balancer which is urged upward and rearward. 2. A lower opening side member surrounding the second balancer from above when the upper lid is closed is provided on both left and right sides of the lower surface of the upper lid.
2. The opening / closing device for an upper lid of a showcase according to 1. 3. The show according to claim 1, wherein a base end of each of the first balancers is mounted via slide means for allowing the main body to move up and down by an appropriate distance. Opening / closing device for the top lid of the case. 4. The showcase according to claim 1, wherein the base end of each of the first balancers is provided with a buffer for reducing an impact when the upper lid is fully opened. Top lid opening and closing device.