JPH0431435Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention has a sliding door that is opened and closed by moving on a step lower than the floor surface, and when the sliding door is in the open state, the tread is raised to the same level as the floor surface. This invention relates to a sliding door interlocking treadle mechanism that compensates for the difference in level.

[Prior art] Conventionally, normal sliding doors are opened and closed by moving on the same plane as the floor, and in particular, are opened and closed by providing a step lower than the floor and fitting the lower side of the sliding door into the step. There was no need. However, recently,
To maintain airtightness between the bottom edge of the sliding door and the floor,
There is an increasing demand for sliding doors that can be opened and closed by moving through a step that is lower than the floor level. This is because sliding doors in storage rooms for magnetic tapes now need insulation and airtightness in order to maintain a constant temperature and humidity inside the room and protect the magnetic media even in the event of a fire or other disaster. Due to this, the width of the stepped portion is required to be as wide as possible, and the sliding door is also required to be thick for insulation.

[The problem that the idea aims to solve]

Sliding doors that are opened and closed by moving over a level difference below the floor level create a level difference between the door and the floor level when opened, which poses the problem of creating an obstruction when passing by or when loading and unloading items. Ta. Therefore, in the past, a step board was separately provided at the step to compensate for the step so that the step was flush with the floor. However, it is troublesome to perform such work each time, and an improvement has been desired.

This invention was developed to solve the above problems, and provides a sliding door interlocking tread mechanism in which when the sliding door is opened, the tread installed in advance rises to the same level as the floor to compensate for the difference in level. The purpose is to

[Means to solve the problem]

As a specific means for achieving the above object, the present invention includes a sliding door that is opened and closed by moving on a step portion lower than the floor surface, a tread plate interposed in the step portion, and a step board that is interlocked with the opening and closing operation of the sliding door. and a lifting means for raising and lowering the stepboard from a position below the lower end surface of the sliding door to the floor surface, the lifting means comprising:
A locking portion provided on the step plate; a hook portion provided on the sliding door that hooks the locking portion and moves the footboard in the opening/closing direction of the sliding door in the process of opening/closing the sliding door; and a hook portion provided on the step portion. The present invention proposes a sliding door interlocking treadle mechanism characterized by comprising a guide means for guiding the treadle to move up and down as the treadle moves.

A preferred embodiment of the guide means includes pins provided on both sides of the step board and inclined guide grooves formed on both inner sides of the stepped portion.

[Effect]

The elevating means moves the treadle in the opening direction of the sliding door and floats it from a position below the lower end surface of the sliding door to a position flush with the floor surface while the sliding door changes from the closed state to the open state. , while the sliding door goes from the open state to the closed state, the treadle is
While moving the sliding door in the closing direction, lower it from a position flush with the floor to a position below the lower end surface of the sliding door.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing an example of a sliding door interlocking type footboard mechanism according to the present invention, FIG. 2 is a front sectional view of the same mechanism with the sliding door in an open state, and FIG.
FIG.

In these figures, 1 is a sliding door that opens and closes an opening 2a for a passage formed in a wall 2 that partitions the inside and outside of the refrigerator. A door wheel 1a is pivotally attached to the upper part of the sliding door 1, and the sliding door 1 can be moved laterally while being suspended on a rail 3 fixed to a wall 2. A pit as a stepped portion 5 lower than the floor surface 4 is provided on the floor surface 4 over the movable range of the sliding door 1, and the sliding door 1 moves with its lower side fitted into the stepped portion 5. It can be opened and closed to maintain airtightness with the floor.

A sliding door 1 is provided in the stepped portion 5 directly below the opening 2a.
A tread 6 is installed in advance that moves up and down using the tensile force when the sliding door 1 is opened and closed, and as will be described in detail later, this tread 6 rises to the same level as the floor 4 when the sliding door 1 is opened, and when it is closed. It is lowered to a position below the lower end surface of the sliding door 1.

The step mechanism that moves up and down in conjunction with the opening/closing operation of the sliding door 1 will be described below. Pins 7 are loosely fitted into both sides of the footboard 6 in a skewered manner at four locations in this example, front, back, left and right. Further, guide grooves 8 are provided on both inner surfaces of the stepped portion 5 corresponding to the position of the pin 7.
is formed. The shape of the guide groove 8 is similar to that of the sliding door 1.
It is sloped upward in the direction of opening.
At the raised position, there is a horizontal step part 8a and a stopper part 8b.
It has The pin 7 is inserted into this guide groove 8.
It is included in.

A roller support plate 9a is fixed to the tip of the footboard 6 in a manner that projects slightly upward, and a bearing roller 9, which constitutes the locking portion of the present invention, is pivotally attached to the upper tip of the roller support plate 9a. . On the other hand, as shown in FIG. 2, the sliding door 1 has an opening roller receiver 1 at the lower end of the door tip, which constitutes the hook part of the present invention.
b and the closing side roller receiver 1c are provided, and the recess 1'
, and also following the closing side roller receiver 1c,
A guide path 1d is provided parallel to the lower side of the sliding door 1 to guide the bearing roller 9 at the tip of the footboard 6 as the sliding door 1 closes. When the sliding door 1 is opened, the tread plate 6 moves between the bearing roller 9 and the opening side roller receiver 1.
b are engaged and moved upward by the action of the pin 7 and the guide groove 8, and as the sliding door 1 is closed, the bearing roller 9 and the closing roller receiver 1c are engaged and similarly moved downward. do.

The operation of the sliding door interlocking type footboard mechanism configured as described above will be described. First, the floating operation of the footboard 6 will be explained. FIG. 2 is a front sectional view of the same mechanism when the sliding door 1 is in the open state, but when the sliding door 1 is in the closed state, the tread plate 6 is lower than the lower end surface of the sliding door 1, as shown by the two-dot chain line in the figure. It is sinking to a lower position. Until the sliding door 1 moves in the opening direction and reaches the opening state, the pin 7 is located at the lowest end of the guide groove 8, and the footboard 6 maintains the sunken position. When the sliding door 1 is about to open, the hook part (opening side roller receiver) 1b of the sliding door 1 engages the locking part (bearing roller) 9 at the tip of the footboard 6 at the position indicated by the two-dot chain line in FIG. Then, the step board 6 is moved in the opening direction of the sliding door 1. This movement causes pin 7 to
rises along the guide groove 8 of the stepped portion 5, and the tread plate 6
floats up to the same level as the floor 4, as shown by the solid line in the figure. In this process, the locking part (bearing roller) 9 is connected to the hook part (opening side roller receiver) 1.
b and rises, and is guided to the recess 1' at the lower end of the door tip. When the treadle 6 is floating, the pin 7
is located at the horizontal stepped portion 8a of the guide groove 8, and stably supports the load of objects being carried in and out that pass on this step board 6. The stopper portion 8b of the guide groove 8 functions to prevent movement of the pin 7 due to inertia.

Next, the lowering operation of the footboard 6 will be explained. When the sliding door 1 is moved in the closing direction from the open state shown in FIG. Then, the sliding door 1 is moved in the closing direction. A long hole 1e is formed at the front end of the sliding door 1 to prevent the roller support plate at the tip of the treadle 6 from interfering with the sliding door 1.
(Fig. 3) is formed. As the footboard 6 moves, the pin 7 descends along the slope of the guide groove 8 and stops at its lowest end. Therefore, the tread 6
sinks from the position indicated by the solid line in FIG. 2 to the position indicated by the two-dot chain line. During this time, the locking portion (bearing roller) 9 of the treadle 6 rolls down the hook portion (closing side roller receiver) 1c of the sliding door 1, and then rolls along the guide path 1d, and the sliding door 1 It becomes possible to move to the closed position in a free state.

In addition, if it is desired to raise the footboard 6 even when the sliding door 1 is half open, the positions of the hooks 1b and 1c of the sliding door 1 may be appropriately moved and set closer to the center.
The pins 7 on both sides of the footboard 6 may be fitted with running rings at their tips, or if rollers or the like are used instead of the pins, the footboard 6 can move up and down more smoothly.

[Effect of idea]

As explained above in detail, the sliding door interlocking treadle mechanism according to the present invention moves the treadle, which has been installed in advance at a step lower than the floor surface, to the same level as the floor surface while the sliding door moves in the opening direction. Since it floats up to the surface and compensates for the difference in level, it does not become an obstacle when passing by or when carrying in and out of utensils, and there is no need to separately install a step board on the level difference each time the sliding door is opened, as was the case in the past. Furthermore, when the sliding door is moved in the closing direction, the treadle sinks in conjunction with the move, making it unnecessary to remove the treadle. In this way, the sliding door equipped with the mechanism of the present invention is
It can maintain heat insulation and airtightness, and has extremely large practical effects.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a sliding door interlocking type footboard mechanism according to the present invention, FIG. 2 is a front sectional view of the same mechanism with the sliding door in an open state, and FIG.
FIG. 1... Sliding door, 1b... Hook part (opening side roller receiver), 1c... Hooking part (closing side roller receiver), 2...
Wall, 4...Floor surface, 5...Step, 6...Treadboard, 7
... Pin, 8 ... Guide groove, 9 ... Locking part (bearing roller), 9a ... Roller support plate.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A sliding door that is opened and closed by moving on a step portion lower than the floor surface, a step plate interposed in the step portion, and a step plate that opens and closes in conjunction with the opening and closing operation of the sliding door. , a lifting means for raising and lowering the sliding door from a position below the lower end surface to the floor surface, the lifting means includes a locking part provided on the step board, and a locking part provided on the sliding door, and the lifting means is provided with a locking part provided on the sliding door during the opening and closing operation of the sliding door. comprises a hook portion that hooks the locking portion to move the treadle in the opening/closing direction of the sliding door, and a guide means provided at the step portion and guides the treadle to move up and down as the treadle moves. Features a sliding door interlocking treadle mechanism. (2) The guide means consists of pins provided on both sides of the treadle and inclined guide grooves formed on both inner sides of the stepped portion.
The sliding door interlocking treadle mechanism described in .