JPH0751872B2 - Sliding door device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a sliding door used for various buildings, vehicles, and the like.

[Conventional technology]

As a sliding door that can be opened and closed by a power unit, the actual open flat 2-
The technique described in Japanese Patent No. 53478 is known. This is to install a screw shaft along the sliding direction above the sliding door that slides to the left and right, and to provide a female screw body that is screwed to this screw shaft on the sliding door, and to install a motor as a power unit on this screw shaft. It is configured to be connected.

However, this configuration opens and closes one sliding door, and in order to open and close two sliding doors to the left and right, another sliding door device must be provided symmetrically, and two motors etc. are required. Therefore, it is against the request for cost reduction. Further, since the sliding doors on both sides are not synchronized, there is a problem that the operation of each sliding door tends to be misaligned.

Further, the mechanism shown in FIG. 4 is also known as a mechanism for synchronously interlocking a plurality of sliding doors with a single power unit. In the figure, 1a indicates a right sliding door, 1b indicates a left sliding door, and each sliding door 1a, 1b is suspended by a guide rail 4 fixed to a building or the like by wheels 3 provided on both sides. Although the doorway is not shown, a door having a size substantially the same as that of the sliding doors 1a and 1b is formed on the back side of the sliding doors.

Further, on the upper side of the sliding doors 1a and 1b, a belt 5 along the sliding direction is provided between the driven wheels 6 and 6 on both sides, and the arm 7 of the sliding door 1 is connected to the upper side of the belt 5 to form the arm 8 of the sliding door 1b. Is connected to the lower side of the belt 5. An air cylinder 9 as power means is provided in the belt 7, and the tip of the piston rod 9a is connected to the arm 7.

When the air cylinder 9 extends the piston rod 9a from the state shown in FIG. 4 to the right by the compressed air, the sliding door 1a is opened to the right via the arm 7. The above movement of the piston rod 9a simultaneously rotates the belt 5, so that the arm 8 moves in the direction of the arrow opposite to the arm 7 and the sliding door 1b fixed to the arm 8 opens to the left in synchronization with the sliding door 1a. . When closing the sliding doors 1a and 1b, the above may be reversed.

Another conventional example is shown in FIG. This is to provide a motor 10 with a gear device instead of the air cylinder 9 in the above-mentioned example, and drive a belt 5 that is wound between a drive wheel 11 and a driven wheel 6 of the motor. If the motor 10 rotates, the belt 5 rotates,
The sliding doors 1a and 1b are opened and closed in synchronization.

[Problems to be Solved by the Invention]

However, in the above-mentioned conventional technique, there is a problem in that the mechanism for synchronously interlocking becomes complicated, and maintenance work and reliability are insufficient.

Also, since the entrance is closed by two sliding doors on the left and right, about half the size of the entrance is required on each of the left and right sides of the entrance when the door is opened. Easy to be restricted.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems in the prior art, and an object of the present invention is to provide a sliding door device that can be opened and closed synchronously with a simple mechanism and a single drive means, and that can reduce the storage space of the sliding door. There is.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention provides a plurality of sliding doors having different movement amounts slidably on a guide rail, and a plurality of drive shafts corresponding to the respective sliding doors are arranged in parallel along the sliding direction and each drive A female screw provided with a lead screw in proportion to the amount of movement of each sliding door and provided with a single power means for synchronously rotating each drive shaft, and each sliding door and the corresponding drive shaft provided in the sliding door. It employs a configuration in which a driven element, which is a screw, is coupled to a drive shaft by screwing.

In this case, the same lead screw is engraved on each drive shaft,
A single power means configured to drive each drive shaft at a rotation speed according to the amount of movement, or to determine each screw lead of each drive shaft separately and rotate each drive shaft at a desired rotation ratio. And each driven door and the corresponding drive shaft are coupled by screwing a driven element, which is a female screw provided on the driven door, onto the drive shaft, and the difference in the lead of the screw of the drive shaft and the difference in the rotation speed. While opening and closing each sliding door at the same time by combining with,
The moving amount of each sliding door may be set to a predetermined moving amount by synthesizing the difference in the lead of the screw of the drive shaft and the difference in the rotation speed, which sets the moving amount of each sliding door to the predetermined moving amount.

Further, a plurality of pairs of left and right symmetrically provided sliding doors having different movement amounts for each pair are slidably provided on the guide rail, and a plurality of drive shafts corresponding to each pair of the sliding doors are arranged in parallel along the sliding direction. , A lead screw determined for each drive shaft is engraved on one side of each drive shaft as a right screw and on the other side as a left screw, and each drive shaft is rotated at a desired rotation ratio. The sliding door and the drive shaft are connected to each other by screwing the driven element, which is a female screw provided on the sliding door, onto the drive shaft, and the rotation and the difference of the lead of the screw of each drive shaft A structure is adopted in which each pair of sliding doors is opened and closed at the same time by combining with the difference in speed, and the movement amount of each pair is set to a predetermined movement amount.

Further, the drive shaft may also serve as a guide rail.

[Action]

When the doorway is open, the plurality of sliding doors overlap each other and are accommodated in a small space on one or both sides of the doorway. In order to close the doorway, a plurality of drive shafts are simultaneously driven by one drive means at a predetermined rotation ratio. The driven element screwed to each drive shaft moves at a speed determined by the rotation speed and the lead of the screw, and the sliding door integrated with each driven element opens and closes at different speeds. Therefore, when the door is closed, the sliding doors are widened and shared by the doors to simultaneously close different parts of the door.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention, in which sliding doors 1a, 1b and 2 are shown.
The a and 2b are substantially the same in size and are arranged symmetrically in pairs, and are suspended by the wheels 3 on the guide rails 4. The doorway is the same as that described in the conventional example.

When the doorway indicated by the chain line is open, the right sliding door 1a
It overlaps with 2a, and the sliding door on the left also overlaps with 1b and 2b. Since the sliding doors 1a and 2a have the same size, the space for accommodating the sliding doors is reduced to about half of the conventional one. Further, when the sliding doors shown by the solid lines are closed, the sliding doors 1a to 2b expand without overlapping, and the sliding doors 1a to 2b share the respective portions to close different portions of the doorway. The moving amount of the sliding doors 1a and 1b at this time is l ₁ as shown in the figure, and the moving amount of the sliding doors 2a and 2b is l ₂ as shown in the figure.
Since a, 1b and 2a, 2b have almost the same size, there is a relation of l ₁ ≈2l ₂ .

A drive shaft 13 corresponding to one pair 1a, 1b of the sliding doors and a drive shaft 14 corresponding to the other pair 2a, 2b of the sliding doors 1a to 2b are parallel to the sliding direction of the sliding doors. The right end is supported by the power means 15, and the left end is supported by the bearing 17. These drive shafts 13 and 14 are synchronously rotated in opposite directions by a power means and a reversing device 16.
As the reversing device 16, for example, a gear mechanism can be adopted.

A right screw is engraved on the left side 13a of the drive shaft 13 and a left screw is engraved on the right side 13b with standard leads. The other drive shaft 14
On the contrary to the drive shaft 13, the right side 14a is a right-hand thread and the left side 14b is a left-hand thread, both of which are engraved with a low lead. The lead of the drive shaft 13 and the lead of the drive shaft 14 have values proportional to the moving amounts l ₁ and l ₂ of the sliding door.
The sliding doors 1a and 1b are provided with driven elements 18, which are screwed to the left and right sides of the drive shaft 13 and which form the other pair of sliding doors 2.
A driven element 18 is provided on each of a and 2b and is screwed to the left and right of the drive shaft 14.

In the above configuration, when the power means 15 is rotated, the drive shafts 13 and 14 are synchronously rotated in the opposite directions by the action of the reversing device 16. However, the left and right sides of the drive shafts 13 and 14 are arranged so that if one is a right-hand screw, the other is a left-hand screw, so that the right sliding doors 1a and 2a move in the same direction and the left sliding door 1b. It moves in the same direction as 2b but in the opposite direction to the right. Since the drive shaft 14 is a low lead with respect to the standard lead of the drive shaft 13, the sliding doors 2a and 2b move by l ₂ while the sliding doors 1a and 1b move by l ₁ .

When the drive shafts 13 and 14 are configured to rotate in the same direction, the right screws or the left screws may be arranged on the same side of each drive shaft.

In the above configuration, if the reversing device 16 makes the rotation ratio of each shaft the same as the ratio of l ₁ and l ₂ , it is possible to make the leads of each drive shaft the same. It may be configured to change both.

FIG. 2 shows another embodiment of the present invention, in which a plurality of sliding doors provided on one side of the doorway are opened and closed. In the figure, the sliding doors 1 and 2 overlap in the open state shown by the chain line, and the sliding doors 1 and 2 show when the doorway shown in the solid line is closed.
2 share each and close different parts of the entrance and exit. The above is the same as the above-mentioned embodiment.

A drive shaft 19 is provided on the sliding door, and its right end is a power means.
15 and the left end is supported by bearings 17, respectively. Standard lead screws are engraved on the left side of the drive shaft 19, and low lead screws are engraved on the right side.The left and right screw leads are the moving amounts l ₁ , l of the sliding doors 1, 2. Determined in proportion to ₂ . A driven element provided at the right end of the sliding door 1
20 is screwed with the low lead screw 19b, and the driven element 21 provided at the left end of the sliding door 2 is screwed with the standard lead screw.

Therefore, when the power means 15 turns the drive shaft 19, the sliding doors 1 and 2
Moves at a speed proportional to the leads of the screws 19a and 19b, and moves from the open position of the chain line to the closed position of the solid line. To open the doorway, reverse the power means.

Further, also in this configuration, if the drive shafts 19a and 19b are separately provided, it is possible to adopt a configuration in which both the rotation ratio and the lead are changed.

FIG. 3 shows an embodiment in which the drive shaft 13 has a left-hand thread and the drive shaft 14 has a right-hand thread. In this case, the reversing gear device 16 rotates the drive shafts 13 and 14 in directions opposite to each other at a rotation ratio according to the amount of movement of the sliding doors 1a and 1b.

Further, in this embodiment, the drive shafts 13 and 14 are the sliding doors 1a,
The guide rail 4 and the wheels 3 (Figs. 1 and 2) are omitted because they have sufficient rigidity to support the weight of 1b. In this case, as a substitute for the wheel 3, a door suspension bearing 23 may be provided as needed. With this configuration,
The sliding door device can be further simplified.

The omission of the guide rails is the same in the embodiments of FIGS. 1 and 2.

Even when the guide rail is used, it is clear that the present invention is not limited to the suspension type shown in the present invention, and a receiving type or the like may be provided under the sliding door.

〔The invention's effect〕

As described above, according to the present invention, it is possible to open and close a plurality of sliding doors having different movement amounts in synchronization with one driving means, and it is possible to easily form a sliding door structure having a synchronization function. In addition, the storage space of the sliding door can be made smaller, it can be installed in a narrow place, and the structure is simple, so that the cost can be reduced, the number of maintenance steps can be reduced, and the breakdown can be reduced. It has various effects such as improved reliability.

[Brief description of drawings]

1 is a front view showing a first embodiment of a sliding door device according to the present invention, FIG. 2 is a front view of another embodiment, and FIG. 3 is a front view of yet another embodiment of the present invention. FIG. 5 is a front view showing a conventional example of a sliding door device. 1,1a, 1b, 2,2a, 2b …… Sliding door, 4 …… Guide rail, 15…
… Power means, 13,14,19 …… Drive shaft, 17,18,20,21 …… Driven element.

Front page continued (72) Inventor Yukio Uozumi 12-9 Amashikamachi, Tarumi-ku, Kobe-shi, Hyogo

Claims (6)

[Claims] 1. A plurality of sliding doors having different amounts of movement are slidably provided on a guide rail, a plurality of drive shafts corresponding to the respective sliding doors are arranged in parallel along the sliding direction, and the amount of movement of the respective sliding doors on the respective drive shafts. Is provided with a lead screw proportional to, and a single power means for rotating each drive shaft in synchronization is provided, and each sliding door and the corresponding driving shaft are provided with a driven element which is a female screw provided in the sliding door. A sliding door device characterized by being coupled by being screwed onto a drive shaft. 2. The sliding door device according to claim 1, wherein each drive shaft is engraved with a screw having the same lead, and the power means drives each drive shaft at a rotational speed according to the amount of movement. 3. A plurality of sliding doors having different movement amounts are slidably provided on a guide rail, and a plurality of drive shafts having lead screws determined corresponding to the sliding doors are arranged in parallel along the sliding direction. Then, a single power means for rotating each drive shaft at a desired rotation ratio is provided, and each sliding door and the corresponding drive shaft are screwed onto the driven shaft, which is a female screw provided on the sliding door. The sliding door device is characterized in that each sliding door is simultaneously opened and closed with a predetermined movement amount by combining the difference in the lead of the screw of the drive shaft and the difference in the rotation speed. 4. The sliding door device according to any one of claims 1 to 3, wherein the respective drive shafts are coaxially connected to each other. 5. A plurality of pairs are provided symmetrically to each other, and sliding doors having different movement amounts are provided slidably on the guide rail for each pair.
A plurality of drive shafts corresponding to each pair of the sliding doors are arranged side by side along the slide direction, and a lead screw determined for each drive shaft is used as a right-hand screw on one side of each drive shaft, and the other. It is engraved as a left screw on the side, provided with a single power means for rotating each drive shaft at a desired rotation ratio, and drives each sliding door and each driving shaft to be a driven element which is a female screw provided in the sliding door. The pair of sliding doors are simultaneously opened and closed by combining them by screwing them into the shaft, and by combining the difference in the lead of the screw of each drive shaft and the difference in the rotation speed, the movement amount of each pair is set to a predetermined movement amount. A sliding door device characterized by: 6. The sliding door device according to claim 1, wherein each drive shaft also serves as a guide rail.