JPH0616016Y2 - Sealed lift door device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a hermetically-sealing type elevator door device used in a place such as a door of a heating chamber that needs to be hermetically closed.

[Prior Art] In a system in which the inside of a room or a container is shielded from the outside air to keep the inside at a low temperature, for example, a door for loading and unloading items, such as a freezer or a refrigerator, can seal the inside or the inside of the container. The door is usually equipped with a sealing device.

[Problems to be Solved by the Invention] However, doors that can be sealed when they are closed have been proposed up to now as doors that are used in places where it is necessary to raise the temperature inside a heating chamber. Absent.

Therefore, the present invention aims to provide a hermetically-sealed lifting door device in which the hermeticity is increased when closed and the space occupied by the door when opened is reduced.

[Means for Solving the Problems] In order to achieve the above object, the present invention is to install guide rollers at the lower positions of both side surfaces of a door body that is divided into a plurality of stages and has an upper portion. position,
A stepped guide roller including a roller portion corresponding to the guide roller and a large-diameter roller portion attached to and protruding from the roller portion is provided, and a guide rail for guiding the ascending / descending of each of the multistage door bodies. Are provided parallel to each other in the vertical direction on one guide plate provided on both sides of the door body, and guide the guide rollers in the lower position of each door body inward when the door in which the above door bodies are extended is closed. Bend the lower end of each guide rail inward, and make an inward cutout at the lower position of each guide rail, and insert the large-diameter roller part of the stepped guide roller at the upper position of each door body to the above cutout. An auxiliary guide rail for guiding is provided at a cutout position in the lower portion of each of the guide rails. Also, in the case of a long door body, an inward pressing means is provided at the center of the lower end.

[Operation] The divided door bodies are moved up and down along the guide rails for each door body provided on one guide rail, and when pulled up, they are stacked and stored, and When descending and closing, the guide rollers at the lower end of each door body follow the lower bent portion of each guide rail at the fully closed position, and at the same time, the stepped guide rollers at the upper end of each door body guide the auxiliary guides of each guide rail. Since it follows the rail, each door body will be pressed inwards,
The hermeticity is improved.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1 to 4 show an embodiment of the present invention, in which a door body 1a, 1b, 1c, 1d divided into four parts is moved up and down so as to cover the opening 2 in front of the opening 2 of the chamber. Provided freely, by disposing guide plates on both sides of each door body, the door body is moved up and down along the guide rails provided on the guide plate, and when the raised door is opened, the door bodies 1a, 1b, 1c , 1d are stored so as to be stacked in the front-rear direction, and when the lowered door is closed, the door body is expanded and pressed against the front surface of the peripheral portion of the opening 2 to be sealed.

To be more specific, the guide rollers 3 are attached to the lower ends of the door bodies 1a, 1b, 1c, 1d, which are divided into four parts, so that the rollers have the same diameter as the guide rollers 3 at the upper end. The stepped guide roller 4 having a large diameter roller portion 6 having a large diameter on the outside of the roller portion 5 and the roller portion 5 is attached through an oilless bearing, and each of the door bodies 1a, 1b, 1
A sponge rubber 7 is attached to the door-stop portion on the back of c, 1d to enhance the sealing property, and each adjacent door body 1a, 1b, 1
c and 1d are engaged with each other when rising, so that when the lowermost door body 1d is hoisted by the hoisting machine through the wire rope 8, the upper door body is sequentially pulled up.
When storing each door body 1a, 1b, 1c, 1d when the door is opened, keep the door bodies 1a, 1b, 1c, 1d at a predetermined interval and fold them, so that the expansion operation can be performed smoothly. Rollers are provided on the tops of the door bodies 1a, 1b, 1c other than the door body 1d.

On the other hand, the guide rails for guiding the ascending / descending of the door bodies 1a, 1b, 1c, 1d have four rows of vertical slits on the guide plates 9 arranged on both sides of the opening 2 of the chamber. Door rails 1a, 1b, 1 which are formed by providing a groove in a groove, and which divide the guide rails 10a, 10b, 10c, 10d in each row into four.
The lower end position is determined stepwise as shown in FIG. 2 in correspondence with the positions of c and 1d at the time of extension, and each guide rail 10a, 10b, 10c, 10
Bend the lower end of d to the inside of each door body 1a, 1b, 1c, 1d
Guide roller 3 and roller part 5 guide rail when descending
While rolling along 10a, 10b, 10c, 10d, it descends and is finally guided by the bent portion so that the door bodies 1a, 1b, 1c, 1d can be brought inward, and each door body 1a, 1b Outside the guide rails 10a, 10b, 10c, 10d where the large-diameter roller portion 6 of the stepped guide roller 4 attached to the upper end of each door body is located when the doors with 1c, 1d extended are closed. An auxiliary guide rail 11 for guiding the large-diameter roller portion 6 inward is attached, and the auxiliary guide rail 11 is attached to each of the guide rails 10a, 10b, 10c, 10d where the auxiliary guide rail 11 is attached.
Notch 12 is provided along the guide surface (upper surface) of, and when the large-diameter roller portion is provided along the auxiliary guide rail 11, the roller portion 5 is provided along the notch 12 of the guide rails 10a, 10b, 10c, 10d. To be guided to. The bending angle of the lower end of each guide rail and the inclination angle of the guide surface of the auxiliary guide rail are equal.

When the door is closed to close the opening 2 of the chamber, the outer door body 1d, which is superposed and stored, is first suspended, and the door bodies 1c, 1b, 1a are sequentially lowered. When each door body 1a, 1b, 1c, 1d is lowered, the guide rails 10a, 10b, which correspond to the guide rollers 3 attached to both side surfaces of each door body and the roller portion 5 of the stepped guide roller 4, Rolled along 10c, 10d,
At this time, the large-diameter roller portion 6 of the stepped guide roller 4 is located outside the groove of each guide rail 10a, 10b, 10c, 10d. When the door bodies 1a, 1b, 1c, 1d come to the position of closing the opening 2, the lower ends of the guide rails 10a, 10b, 10c, 10d are bent inward, so that the door bodies 1a , 1
The guide roller 3 at the lower end of b, 1c, 1d is the guide rail 1
0a, 10b, 10c, 10d are displaced inward along the above-mentioned bent portions, and at the same time, the large-diameter roller portion 6 of the stepped guide roller 4 at the upper end hits the auxiliary guide rail 11 to move the inner portion as shown in FIG. Will be guided to you. As a result, the door main bodies 1a, 1b, 1c, 1d are fully closed with the lower end of each guide rail and the auxiliary guide rail.
Since it is regulated by 11 and has a wedge effect and is pressed inward, the opening 2 can be sealed. At this time, by sealing the sponge rubber 7 on the inner surface of each door body 1a, 1b, 1c, 1d, it is possible to improve the sealing performance.

Next, when opening the door to open the opening 2 of the room,
By winding up the wire rope 8 with the hoisting machine, the door body 1d at the lowest stage is first pulled up along the guide rail 10d. At the beginning of raising the door body 1d, the guide roller 3 falls into the bent portion at the lower end of the guide rail 10d,
Further, since the large-diameter roller portion 6 of the stepped guide roller 4 is pulled out along the auxiliary guide rail 11 from its respective state, the wedge effect is released first, and then the door body 1d.
Is raised along the guide rail 10d. Door body 1d
Is raised by a predetermined amount, the door body 1d is locked to the next door body 1c and is raised in a state where the door bodies 1d and 1c overlap each other. Is also raised and stored above the opening 2. Since the stored door bodies 1a, 1b, 1c, 1d are folded and overlapped in the front-rear direction, the space of the storage place can be reduced.

Next, FIG. 5 and FIG. 6 show another embodiment of the present invention, which has the same structure as the above-mentioned embodiment and has a good sealing property of the central portion of the lowermost door body 1d. It is something that can be done. That is, in the case of a door body having a relatively long span, an appropriate number of wedges 13 (two in the drawing are provided) having an inclined surface that is a downward slope from the outside to the inside are formed on the lower surface of the central portion or a portion close to the central portion. Projecting)
On the other hand, a roller 14 that engages with the wedge 13 is attached to the front surface of the lower edge of the opening 2 via a bracket 15, and when the door is closed, the wedge 13 extends along the roller 14 to press the door body 1d inward. Thus, the door body 1d is wholly pressed to the room side in combination with the pressing action of the guide rail 10d and the auxiliary guide rail 11 to the inside of the door body 1d.

According to this embodiment, even if the door body is long, there is an advantage that the central portion is pressed inward and the sealing property is improved.

In the above embodiment, the case where the door body is divided into four is shown, but the number of divisions is arbitrary.

[Advantages of the Invention] As described above, according to the sealed elevator door device of the present invention,
A guide roller was attached to the lower position of each side surface of the door body that was divided into a plurality of stages and was attached to the roller portion corresponding to the guide roller and the roller portion at the upper position so as to project. Provided with a stepped guide roller consisting of a large-diameter roller portion, and a guide rail for guiding the raising and lowering of each of the above-mentioned multi-stage door bodies,
Guide plates provided on both sides of the door body are provided parallel to each other in the vertical direction, and each guide guides the guide roller at the lower position of each door body inside when the door in which the door body is expanded is closed. The lower end of the rail is bent inward, and further, an inward cutout is provided at the lower position of each guide rail, and the large diameter roller portion of the stepped guide roller at the upper position of each door body is guided to the above notch. Auxiliary guide rail,
Since the guide rails are provided at the notch positions at the bottom of each of the guide rails, each door body is pressed inward by the wedge action of the guide rails and the auxiliary guide rails when the door is closed, so that the sealing performance can be improved. While you can
Since the auxiliary guide rail that engages with the large-diameter roller portion of the stepped guide roller provided at the upper position of each door body is attached to the outside of the guide rail, the guide plate provided with the guide rail parallel to the vertical direction is Even if the door body has a long span, it can be addressed to one sheet on both sides of the door body, and a wedge is also provided in the central portion of the door body to engage with a roller provided on the fixed side. The excellent effect that the sealing property of the portion can be improved can be obtained.

[Brief description of drawings]

FIG. 1 is a partial front view showing an embodiment of a hermetically-sealed lifting door device according to the present invention, FIG. 2 is a side view in the direction II of FIG. 1, FIG. 3 is a view showing a guide roller, and FIG. 2 is an enlarged view of IV portion, FIG. 5 is a front view showing another embodiment of the present invention, and FIG. 6 is a partially enlarged sectional view of FIG. 1a, 1b, 1c, 1d …… door body, 2 …… opening, 3 …… guide roller, 4 …… stepped guide roller, 5 …… roller part,
6 ... Large diameter roller part, 9 ... Guide plate, 10a, 10b,
10c, 10d …… Guide rail, 11 …… Auxiliary guide rail, 1
3 …… wedge, 14 …… Laura.

Claims (2)

[Scope of utility model registration request] 1. A guide roller is attached to a lower position of each side surface of a door body which is divided into a plurality of stages to form a multi-stage type door body, and an upper portion is provided with a roller portion corresponding to the guide roller and the roller portion. A stepped guide roller consisting of a large-diameter roller portion that is attached and projected is provided, and guide rails for guiding the raising and lowering of each of the above-mentioned multi-step door bodies are provided on both sides of the door body. Is provided in parallel with the guide plate in the vertical direction, and the lower end of each guide rail is bent inward so as to guide the guide rollers in the lower position of each door body to the inside when the door in which the above door body is expanded is closed, and further, An inward cutout is provided at a lower position of each of the guide rails, and an auxiliary guide rail for guiding the large-diameter roller portion of the stepped guide roller at an upper position of each door main body to each of the above notches is provided. Sealed elevator door apparatus characterized by including the notch position of the bottom of Idoreru. 2. A plurality of multi-stage door main bodies is provided with a wedge having a guide surface inclined downwardly from the outside to the inside at a central portion of the lower end surface of the door main body at the lowermost stage, and fixed downward. The sealed elevator door apparatus according to claim 1, wherein a member that engages with the guide surface of the wedge is attached to the lower edge of the side opening.