JPS5834945Y2 - Sliding door opening/closing device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sliding door opening/closing device, and particularly to a structure of a sliding door opening/closing device in which the sliding door is inclined in the opening/closing direction.

For example, in a freezer or refrigerated showcase where the opening at the front of the top surface can be opened and closed with a sliding door that can be moved back and forth, if the sliding door is tilted forward, that is, the front part is tilted low, it is possible to see through the inside of the refrigerator. Since the surface can be made wider, the display effect is improved.

However, increasing the inclination angle of the sliding door increases the descending speed when closing the sliding door, which can cause your hand to become strongly trapped between the sliding door and the handrail, especially for sliding doors with extremely low braking force, such as sliding doors with wheels. In this case, the descending speed also increases, so there is a risk that the hand will be hit hard.

Therefore, an object of the present invention is to provide an opening/closing device having a sliding door inclined in the opening/closing direction so that the descending speed of the sliding door can be automatically reduced at a relatively low position with a simple structure.

Another object of the present invention is to improve the display effect of a freezer or refrigerated showcase whose top opening can be opened and closed with a sliding door without compromising safety.

The present invention will be described below using embodiments with reference to the drawings.

In the freezing or refrigerating showcase shown in FIGS. 1 to 7, the upper front surface of the storage body 10 having an insulating structure is constructed with a transparent double-glazed window 11, and the upper surface of the storage body 10 is arranged on a horizontal plane 12. It is tilted forward at an angle θ with respect to the front part, and an opening 13 is provided in the front part, and this opening 13 can be opened and closed by two sliding doors 15 that are movable in the front-rear direction 14.

When the sliding door 15 is moved rearward, it is inserted between the upper rear wall 16 and the illumination part 17 to open the opening 13, so that articles can be taken in and out of the storage body 10 through the opening 13.

Furthermore, sliding door supports 18 for receiving the weight of the sliding door 15 are provided on the upper surface of the storage body 10 at positions along both side walls 19 and intermediate positions therebetween, with an inclination equivalent to that of the upper surface of the storage body 10.

The sliding door receivers 18 at positions along both side walls 19 are provided with partitions 20 and one channel rail 21 and one drain groove 22, and the sliding door receivers at intermediate positions are attached to the above-mentioned side walls 1.
A pair of grooved rails 21 and a drain groove 22 are provided, each pair having a structure similar to that of a sliding door holder located along line 9.

In addition, the front part of the partition 20 of the sliding door receiver 18, that is, the low position part, is made into a rising part 23 whose height is increased, and the upper end of this rising part 23 is made of, for example, fluororesin, nylon, polyacetal, etc. A friction member 24 made of

Note that a slope portion 25 is provided at the boundary between the simple partition 20 and the rising portion 23.

On the other hand, the sliding door 15 has a double-glazed glass plate 27 fixed to a door frame 26. A heat shielding curtain 32 is attached to the rear of the sliding door 15, and wheels 28 are mounted on the left and right ends of the door frame 26 and can be moved to the front and rear positions. , 29, respectively.

Then, such a sliding door 15 is mounted on wheels 28 with respect to the storage body 10.
．． 29 is fitted into the grooved rail 21.

At that time, the back surface 30 of the door frame 26 is made to face the partition 20, and the heat shielding curtain 32 is made to contact the upper rear wall 16 of the storage body 10.

In the showcase thus obtained, when the sliding door 15 is at the rear and the opening 13 is wide open, the sliding door 15 is brought into contact with the sliding door receiver 18 only through the front and rear wheels 28 and 29. Therefore, when the sliding door 15 is closed, the wheels 28 and 29 roll within the channel rail 21 and move forward at a relatively high speed. By contacting and sliding thereon and then resting on the riser 23, the front part of the sliding door 15 is lifted and the front wheels 28 are moved away from the channel rail 21;
Since the back surface 30 of the door frame 26 slides on the friction member 24 provided at the upper end, the sliding door 15 receives a relatively large braking force and is decelerated, moving forward at a low speed and making it easy to move forward. The front end comes into contact with a cushioning material 32 provided inside the opening 31 and stops, thereby closing the opening 13.

That is, when the sliding door 15 moves in the direction of closing the opening 13, it initially moves at high speed with almost no braking force, but halfway through it automatically switches to receiving a relatively large braking force, and then moves at low speed. I will have to move.

Furthermore, when the sliding door 1 closes the opening 13, the back surface 30 of the door frame 26 and the friction member 24 are brought into close contact with each other due to the weight of the sliding door 1, and the heat shielding curtain 32 is brought into close contact with the top rear wall 16, so that both sides of the sliding door 1 are brought into close contact with each other. Warm air containing moisture hardly enters the door frame 26 at the rear of the door frame 26, and entry of warm air from the rear of the door frame 26 is completely blocked.

Such switching of the closing speed of the sliding door 15 can be performed by providing a friction member 24 on the back surface 30 of the door frame 26, as shown in FIG. This can also be done by providing both.

In addition, although the above description has been made in which the braking force is applied by lifting the front part of the sliding door 15, it is also possible to lift only the rear part of the sliding door 15, or even to lift the entire sliding door 15. In that case, the above-mentioned effect of blocking warm air intrusion may be further enhanced.

It goes without saying that the same method can be used whether there is one sliding door 15 or three or more sliding doors 15.

As explained above using the examples, in the present invention,
The lowering speed of the wheeled sliding door, which is placed on the sliding door holder installed at an angle, is dynamically reduced by 1 on the way down, so there is no danger during use even if the sliding door is set at a large angle of inclination. Therefore, the sliding door has a large inclination angle to provide a display case with a large display area that allows the inside of the refrigerator to be seen through, and is advantageous in terms of cost since no complicated braking mechanism is used.

[Brief explanation of drawings]

Fig. 1 is an external perspective view showing an example of a showcase implementing the present invention, Fig. 2 is a plan view of the same, Fig. 3 is a plan view with the sliding door and lighting section removed, and Fig. 4 is a sliding door holder. A perspective view showing an example; FIG. 5 is a cross-sectional view taken along line 5-5 in FIG. 2; FIG. 6 is an enlarged cross-sectional view of essential parts taken along line 6-6 in FIG.
Figure 7 is an enlarged cross-sectional view of the main part taken along line 77 in Figure 5;
The figure is similar to FIG. 6 showing another embodiment of the present invention. 15...Sliding door, 17...Lighting section, 18
...Sliding door holder, 23...Rising part, 2
4...Friction member, 28.29...Wheel.

Claims (1)

[Scope of utility model registration request] The sliding door holder includes a sliding door holder for placing and receiving the wheels of the sliding door and guiding the transfer of the wheels, and the sliding door holder is inclined such that one end is low and the other end is high in the sliding door opening/closing direction. A rising portion is provided at a closer portion of the sliding door to lift up at least a portion of the sliding door by contacting the lower surface of the sliding door, and friction between the rising portion and the lower surface of the sliding door applies a large braking force to the sliding door. A sliding door opening/closing device for a showcase, which is characterized by: