JPH0556832A - Refrigerated case - Google Patents

Abstract

PURPOSE:To make the shock on fully opening and closing a door adsorbed in the rotary opened and closed door equipped at a refrigerated case and lessen the opening and closing force to facilitate the operation. CONSTITUTION:This show case is provided with a gear mechanism 16 composed of a large gear 23 and a small gear 22 and a rotary ring piece 20 fitted to the small gear 22. And a door body 9 and a gas spring mechnism 15 are connected through the intervention of the gear mechanism 16 moving in accordance with the opening and closing motion of the door body 9. As the result thereof, the gas spring mechanism 15 serves to resist against the opening and closing on fully opening and closing the door body 9 and also assists to accelerate opening and closing motion during the opening and closing motion.

Description

Detailed Description of the Invention

[0001]

[Industrial application]

The present invention relates to a refrigerating showcase provided with a door body for opening and closing a front opening of the refrigerator case.

[0003]

2. Description of the Related Art In Japanese Utility Model Publication No. 61-42454, a gas spring mechanism is used so that the door can be opened and closed lightly so that the product can be taken out and stored smoothly. A device is disclosed.

In the device disclosed in the publication, the door has a flat shape,
When it is closed, it is in an oblique state and closes the opening.
It is adapted to be rotated upward by a predetermined angle to be opened. In addition to this type of door opening / closing device, a refrigerating showcase using a door body having an arc shape has also been proposed.

In the case of this arcuate door body, a weight is used as shown in FIGS. 8 and 9 in order to balance the weight of the door around the rotation fulcrum. In FIG. 8 and FIG. 9, reference numeral 9 is a door body in which a transparent plate 12 having an arcuate shape is mounted on a door frame 13.
The transparent plate 12 is made of, for example, glass or a transparent resin material.

The door frame 13 is provided with door stays 13a, 13a provided oppositely on the left and right ends thereof.
a, 13a arm pieces 13b, 13b protruding from the center of the rear end
The rotary support shafts 10 and 10 are provided so as to project from the base, and are supported in the main body case by the rotary support shafts so that the opening can be opened and closed. The end of the arm piece 13b, that is, the rotary support shaft 10
A weight W is fixed to the opposite side. Reference numeral 11 is an operation handle for opening and closing the door 9.

When the door is opened from the closed state of FIG. 8, the operating force against the weight W is first applied to open the door, and when the door is opened, the weight W exerts a rotational force to further open the door to relax the opening force. Let Then, when the weight 5 becomes a state in which the weight 5 can be further opened from the half-opened state in which the weight 5 is vertical, the weight 5 serves as a reaction force to prevent the door body 9 from being shocked and fully opened. Similarly, when the door is closed, the weight W prevents the door from being shockedly closed.

[0008]

As described above, in the conventional case, the gas spring mechanism is simply used, and the weight is attached to the side opposite to the rotation fulcrum of the door.
The weight of the door and the collision when opening and closing the door were alleviated.

The present invention has been further improved to reduce the force at the time of opening the door and to reduce the impact due to the dead weight of the door at the time of fully opening and fully closing with a gear mechanism to achieve smooth operation with one gas spring mechanism. An object is to provide a refrigerated showcase having a door opening / closing device that can be opened and closed.

[0010]

According to the present invention, a main body of a showcase is formed by a heat insulating wall having a front opening, and an arc-shaped transparent plate for closing the front opening is provided so as to be openable, closable and openable back and forth. In a refrigerated showcase, a door body rotatably supported by door stays provided at both ends of the door frame on which the transparent plate is stretched and a large body fixed to a rotation support shaft of one door stay. A gear, a small gear that meshes with the large gear, a link piece that has one end fixed to the gear shaft of the small gear and that rotates, and a forward and backward movable body that is connected to the other end of the link piece by pivotally attaching the tip. The gas spring mechanism comprises a rod and a support portion into which the rod is inserted, and an end portion of the support portion is rotatably supported in the main body case.

[0011]

When the door is opened, the large gear and the small gear rotate in conjunction with it, and the rotation of the small gear acts on the rod of the gas spring mechanism via the link piece.

At this time, although the rod extends, the force of the gas spring mechanism to extend and the force of opening the door are in the same direction, so that the door can be opened smoothly. However, when the door is fully opened, it becomes more open due to its own weight, but at this time, the rod is pushed against the gas pressure via the gear mechanism and the link piece, so the gas spring The force of the mechanism works to impede the operating force to try to fully open, and alleviates the impact at full opening. Similarly, when closing the door, the reverse principle works.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. It should be noted that the same or equivalent components as in the prior art are designated by the same reference numerals.

Reference numeral 1 denotes a refrigerating showcase body, and 2 is a body portion formed by a heat insulating wall 4 which defines an inside 3 together with a door body described later. A cold air passage 5 is formed along the front wall, the bottom wall, and the rear wall of the heat insulating wall 4, and a cooler 6 and a cold air circulation fan (not shown) are arranged in the cold air passage 5. 7
Is a partition plate for partitioning the inside 3 and the cold air passage 5. 8a is a cold air inlet, and 8b is a cold air outlet. Reference numeral 9 denotes a door body which is opened and closed upward and downward by a handle 11 with a rotary support shaft 10 as a fulcrum, and has a well-known configuration including an arc-shaped transparent plate 12 and a door frame 13. As shown in the figure, the door 9 is in the storage 3
When the front upper opening 14 is closed, the cool air circulates in the order of the cool air passage 5 → the upper space of the inside 3 → the cool air passage 5 to cool the product. Products are stored in the product storage room 3A.

By the way, when the door 9 is opened and closed, a gas spring mechanism and a gear mechanism that act on the opening and closing are provided in association with each other.

FIG. 2 shows a relational structure of the door body 9, the gas spring mechanism 15, and the gear mechanism 16. Further, in each of the drawings showing the external appearance of its main part in FIG. 3 and the side surface structure of its main part in FIG. 4, the gas spring mechanism 15 has a structure in which gas is press-fitted inside and the rod 17 protrudes from one end. The arm functions as a movable arm provided with a support portion 19 having an opening 18 at the end. Gas spring mechanism 1
5 is rotatably supported by a hinge having its supporting portion 19 fixed to an appropriate member in the main body 2, such as a frame, via a screw passing through the opening 18. A link piece 20 is rotatably connected to the tip of the rod 17 via a connecting shaft 21. The gear mechanism 16 includes a small gear 22 provided on the gas spring mechanism 15 side and a large gear 23 provided on the door body 9 side, and both gears 22 and 23 are meshed with each other. That is, the small gear 22 is attached to the gear shaft 24 which is inserted and fixed to the free end of the link piece 20. On the other hand, the gear 23 has two door stays 13a,
It is attached to one of the door stays 13a of 13a. That is, the rotation support shaft 1 of the arm piece 13b of the one door stay 13a.
It is attached and fixed to 0. Note that 25 and 26 are bearing portions that support the rotary support shaft 10 and the gear shaft 24.

Therefore, the door body 9 is constructed with the rotary support shaft 10 as a fulcrum.
When is rotated to open and close, the large gear 23 is also rotated together with the door body 9,
The rotation is the driven rotation of the small gear 22, and the link piece 20
The left and right turning motion of the gas spring mechanism 15
The rod 17 is moved back and forth.

The opening / closing operation of the above arrangement will be described below.

FIG. 5 shows a door closed state. When the handle 11 starts opening the door 9 in the arrow direction, the large gear 23 rotates in the arrow direction (clockwise), the small gear 22 rotates in the arrow direction (counterclockwise), and the link piece 20 also rotates counterclockwise. The rod 17 of the gas spring mechanism 15 is rotated in accordance with the direction.
Begins to work to pull out.

The direction in which the rod 17 of the gas spring mechanism 15 extends extends in the same direction as the force for opening the door 9, so that the door can be opened smoothly.
The situation in which the gas spring mechanism 15 exerts a force to assist the opening of the door body 9 continues until the door body 9 is in the half-opened state shown in FIG. 6.

Further, when the door 9 is further opened and the situation is going to be fully opened as shown in FIG. 7, the door 9 itself is further opened by its own weight, and a shock occurs at the time of full opening.

However, when the door body 9 is rotated from FIG. 6 to FIG. 7, further meshing rotation of the large gear 23 and the small gear 22 causes the link piece 20 to rotate further counterclockwise.
As a result, on the contrary, the acting force of retracting the rod 17 is applied to the gas spring mechanism 15. Since the rod 17 is retracted against the internal gas pressure, the force of the gas spring mechanism 15 acts as a force to prevent the door body 9 from closing due to its own weight.
The shock when fully opened is reduced.

When closing from FIG. 7, the reverse principle works,
It can be opened and closed smoothly and the impact force at the time of full closing is also eased.

[0024]

As described above, according to the present invention, the door body of the refrigerating showcase which is opened and closed by using the gas spring mechanism is connected to the gas spring mechanism by using the gear mechanism, so that the gas spring mechanism Since the characteristics can be extracted from both the opening and closing sides of the door, it is possible to reduce the opening / closing operation force of the door and the impact at the time of fully opening and fully closing. Therefore,
It is possible to provide a refrigerated showcase that can be opened and closed smoothly, has a small damage rate, and has a door that withstands long-term use.

[Brief description of drawings]

[Figure 1] Vertical side view of a refrigerated showcase

FIG. 2 is a structural perspective view of a door body that is opened and closed and rotated.

FIG. 3 is a perspective view of a main structure of a door body that opens and closes by connecting a gas spring mechanism and a gear mechanism.

FIG. 4 is a side view of a main structure of a door body having the same effect as in FIG.

FIG. 5 is an explanatory view of the state when the door body is fully closed.

FIG. 6 is an explanatory view of a state when the door body is open.

FIG. 7 is an explanatory view of a state when the door body is fully opened.

FIG. 8 is an explanatory view of a conventional door body using a weight in a fully closed state.

FIG. 9 is an explanatory view of a state when the conventional door body is fully opened.

[Explanation of symbols]

 1 Refrigerator Showcase Main Body 3 Inside 9 Door 10 Rotating Spindle 15 Gas Spring Mechanism 17 Rod 20 Small Gear 23 Large Gear 24 Gear Shaft

Claims (1)

[Claims] 1. A refrigerated showcase in which a showcase main body is formed of a heat insulating wall having a front opening, and an arc-shaped transparent plate for closing the front opening is provided so as to be openable, closable, and openable back and forth. A door body rotatably supported by door stays provided at both ends of the door frame on which the transparent plate is stretched, and a large gear fixed to a rotation support shaft of one door stay,
A small gear that meshes with the large gear, a link piece that is fixed at one end to the gear shaft of the small gear and rotates, and a rod that is connected to the other end of the link piece by pivotally attaching the tip to the other end. A refrigerating showcase comprising a support portion having a rod inserted therein, and a gas spring mechanism rotatably supporting an end portion of the support portion in the main body case.