JP3425683B2 - Locking mechanism for movable center pillar - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking mechanism for a movable center pillar, and can be used for an electric movable center pillar lock mechanism used for an overhead door or the like.

[0002]

2. Description of the Related Art So-called overhead doors are sometimes used in factories, fire stations, and the like, where importance is attached to the ease and speed with which a person can flip up manually, and the appearance of the ceiling does not matter much. In this case, the overhead door opens and closes the opening / closing opening for access. However, when the width of the doorway is large, inconvenience arises in use and the strength of the shutter curtain becomes insufficient in the configuration of opening and closing with one shutter curtain. Therefore, in such a case, the shutter curtain is divided into a plurality of parts in the width direction, and the space between the both ends of the opening is partitioned by a center pillar, and guide pillars are attached to the center pillar in the same manner as the both ends of the opening. It is configured to guide the split shutter curtain in the vertical direction.

In an overhead door having such a structure, since the presence of the center pillar interferes with the opening of the opening, it is moved to the side end of the opening to be stored therein, and when closed, it is moved to a predetermined position. Fix in that position. However, since the central pillar is long in the vertical direction and it can not move smoothly because it shakes when moving to a predetermined position, it is possible to install a rail not only on the top but also on the floor and guide the top and bottom of the central pillar with the rail. Yes, in this case, it is possible to move smoothly, but there is a problem such as dust clogging on the floor rails, and this floor rail is omitted and the center pillar is suspended by one or two upper rails. You may want to move it.

[0004]

However, as described above, the central pillar is long in the vertical direction, and in particular, in the suspension system, the lower part of the central pillar may sway, or some inclination may occur due to aging. In such a case, even if the middle pillar is moved along the upper rail by a predetermined distance to a predetermined position that is set, the lower end of the middle pillar is not always located at a fixed setting position. In this state, it is not easy to fit the lock member of the middle pillar into the receiving portion provided on the floor. In particular, in the case of a system in which the central pillar is moved by electric drive and locking is also performed automatically, a state in which the locking member does not fit into the receiving portion may occur.

Therefore, it is an object of the present invention to provide a mechanism capable of smoothly locking even if the position of the lower end of the movable center pillar is deviated from the set position.

[0006]

SUMMARY OF THE INVENTION In view of the above object, the present invention is directed to a receiving portion in which a movable pillar is provided at a lower portion of a movable pillar so as to be able to move up and down, and the movable pillar is provided at a predetermined position on a floor. A locking mechanism for a movable center pillar, which is moved to an upper position, lowers the center pillar lock member and fits into the receiving portion, and locks the movable middle pillar at that position, wherein the center pillar lock member is in a vertical direction. The two locking rods extending in the direction of one, the one is configured to reach the receiving portion earlier than the other, and the receiving portion has a size larger than that of the tip of the one locking rod. Is large by a predetermined amount, and there is a positional relationship between the guide hole that can guide the one lock rod toward the center position by the contact engagement while the one lock rod is descending, and the two lock rods with respect to the guide hole. It is formed at the corresponding position,
A size capable of receiving the other of the locking rod, and includes a restriction hole sized to regulate the movement in the horizontal plane of the lock rod of said other, the other locking rod
The tip of the lock rod is a cone, and the tip of the one locking rod is a cone.
In the case of, from the radius of the guide hole to the radius of the one lock rod
Set so that the value obtained by subtracting is less than the radius of the regulation hole.
However, if the tip of one of the lock rods is a truncated cone,
Insert the radius of the tip surface of the truncated cone from the radius of the lock rod on one side.
The value obtained by subtracting the subtracted value from the radius of the guide hole is
( EN) Provided is a locking mechanism for a movable center pillar, which is set so as to be equal to or less than a radius . In addition, at the bottom of the movable center pillar
A column lock member is provided so that it can be raised and lowered, and the movable center column is placed on the floor surface.
Move it to a position above the receiving part provided at a fixed position,
Move the lock member down and fit it into the receiving part.
It is a locking mechanism of the movable center column that locks the center column in its position.
The middle pillar locking member has two vertically extending parts.
Equipped with a locking rod, one for the receiving part more than the other
It is configured to reach the end first, and
Surrounds the locking rod provided in the middle pillar locking member
As shown in the figure,
A guide member is provided, and the receiving portion has one of the locks.
A certain amount larger than the tip of the rod,
One of the locks is brought into contact by contact engagement while the lever is descending.
A guide hole for guiding the rod toward the center position, and the guide hole
The position corresponding to the positional relationship of the two lock rods with respect to
Is formed on and receives the other locking rod
And the size of the other lock rod within the horizontal plane
Equipped with a regulation hole of a size that can regulate the movement of
Can interfere with the annular guide member in the receiving portion.
The main body of the center pillar is provided with a receiving member with a height that does not interfere with it.
The receiving member interferes with the moving annular guide member.
The receiving surface that can be forcibly moved toward the center position
A locking mechanism for the movable center column, characterized by being equipped with
I will provide a.

In the structure in which one of the lock rods reaches the receiving portion earlier than the other, the simplest structure is that one of the lock rods is projected downward longer than the other, and two lock rods are provided. There is a mechanism that descends at the same time. Alternatively, a mechanism may be used in which one of the lock rods is first lowered, and then the other lock rod is lowered after being lowered by a predetermined length (or after a predetermined time). The movable center pillar includes a case where it is made movable by other power in addition to electric power and a case where it is manually moved.

[0008]

When the movable center pillar is moved, even if the lower part of the movable middle pillar is deviated from the set position, one of the lock bars provided at the lower part has a position with respect to the receiving part before the other lock bar. The guide hole, which is larger than the tip portion of the one lock rod by a predetermined amount, interferes with the tip portion of the one lock rod, so that the one lock rod is It is moved in the direction of the central position of the guide hole (direction to eliminate bias) together with the lower part of the movable center column holding the lock rod, and approaches the set position. As a result, the other locking rod is moved to a position with an accuracy that allows it to be inserted into the regulation hole, and insertion becomes possible
Since its movement is restricted, the movable center pillar can be locked.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail based on an embodiment shown in the accompanying drawings. 1 is a side view including a movable self-propelled movable center pillar according to the present invention, FIG. 2 is an enlarged view of an essential part seen from a direction of an arrow B in FIG. 1, and FIG.
It is a top view of the floor section seen from the arrow E-E line of view.

First, the outline of the overhead door will be described with reference to FIG. In the lintel of the building structure 10, an I-type steel 12 is extended and fixed in parallel with the upper frame 10U of the opening. A pair of hanger rollers 14R that roll on the flange of the I-shaped steel 12 and a pair of lateral deviation prevention rollers 14S that roll on contact with the side edges of the flange are rollably held. A suspension frame body 14 is arranged so as to be movable along the I-shaped steel 12. A movable center pillar 18 is suspended below the suspension frame body 14 via bolts and nuts 16. Reference numeral O indicates the outside of the building and I indicates the inside.

The movable center pillar 18 has a pair of guide rail parts 20A on the left and right side surfaces which are the moving direction (X direction).
20A '(see FIG. 5) is fixed. On the other hand, at a predetermined setting position in the X direction of the movable center pillar 18, the upper guide rail component 20B, which forms a complete guide rail continuously above the guide rail component 20A, has a setting gap ΔL of 20 mm, for example. It is fixed. Therefore, if the hanger roller 14R is rolled by an electric motor (not shown) incorporated in the movable center column 18 to move and stop in a predetermined X direction and is locked by a lock mechanism described later, the guide rail component 20A, 20B is continuous with only a small gap, and a winding rope (not shown) is wound on the winding drum 5
The shutter curtain (not shown) can be vertically guided while being wound by 0.

The floor 22 has a cover plate 3 shown in FIG.
A recess 30 whose surface is covered by 4 is formed. A drain hole 32 is provided in the bottom of the recess 30.
In the center of the cover plate 34, three holes HB ′, HA, HB are provided at equal intervals along the X direction as receiving portions. Below the cover plate 34, the box of the recess 30 is provided. An upper plate 36 that constitutes the upper surface of the body is provided with a rectangular hole 36H having a size including the above three holes.

On the other hand, on the back surface of the cover plate 34, the tongue-shaped pressing plate 3 is housed in the rectangular hole 36H.
8 is rotatably mounted about the shaft 40. The pressing plate 38 is biased by the action of a torsion coil spring 40B which is fitted over the shaft 40 and is constantly pressed against the back surface of the cover plate 34. The pressing plate 38 has three discs 38B ', 38A,
38B is fixed, and torsion coil spring 40B is fixed.
When the disc is pressed against the back surface of the cover plate 34 by the above action, the respective discs are set in such positions and dimensions that they can be fitted so as to close the respective holes. The thickness of each disc is the cover plate 3
The thickness of the cover plate 34 is set to about 4 and is designed so that the surface of the cover plate 34 is in a generally flat plane in the normal state, that is, no step is formed between the cover plate 34 and the floor 22.

At the lower part of the movable center pillar 18, the holes HB ', HA, HA are arranged side by side along the X direction during traveling.
Corresponding to HB, arranged in a straight line at equal intervals as the holes,
Middle pillar lock member 2 including three lock rods 26B ′, 26A, 26B having the same diameter and having a pointed conical tip.
6 is provided, which is driven by the rotation of the rotating member 24 schematically shown in FIG. 1 (by the rotational driving force of an electric motor (not shown)), and 3 by the action of the pin-connected drive rod 24D.
Books move up and down at the same time. Along with this, the upper lock rod 28 disposed on the upper part of the movable center pillar 18 also moves up and down by the action of the other drive rod 24U pin-connected to the rotating member 24 in the same manner as the above-mentioned drive rod 24D, and when it rises. The upper end of the movable center pillar 18 is locked in a hole provided at a predetermined position with respect to the building 10.

However, for the reasons already mentioned, the movable center pillar 1
Since the position of the lower end of 8 is not accurately determined, the following measures have been taken. That is, of the three lock rods, the central lock rod 26A is formed so as to project downward more than the other two lock rods, and reaches the floor surface earliest. On the other hand, of the three holes, the guide hole HA is larger than the other two holes, and the other two holes (regulating holes) HB ′ and HB are holes of the same size. In this embodiment, the hole HA has a diameter of 60.
mm and the other two are 34 mm. The diameter of each lock rod is 32 mm. Therefore, when the lock rods are inserted into the holes, the movement of the lock rods 26B 'and 26B on both sides in the horizontal plane is regulated by the regulation holes HB' and HB on both sides. The movement of is also locked.

However, the central locking rod 26A has a gap of 14 mm in radius from the guide hole HA, so that the movement of the movable central column 18 cannot be restricted. However,
As described above, when the movable center pillar 18 is moved to the predetermined position, its lower portion is not always located at the set position,
In the past, it was often the case that the central pillar lock member could not be fitted into the hole even if it was lowered. Therefore, when the lower part of the movable center pillar 18 is not located at the set position in this way, considering the midway process of lowering the center pillar lock member 26, in the structure of the present invention, the guide hole HA is large and the center is large. Even if the dot-shaped small tip of the lock rod 26A is biased within a radius of 30 mm from the predetermined setting position, the guide hole HA
The central locking rod 26A is guided to the center of the guide hole HA (that is, the predetermined setting position) by the guide of the contact engagement between the conical inclined surface of the tip portion and the peripheral edge of the guide hole.
Is guided in the direction, the entire central pillar locking member 26 approaches the predetermined setting position together with the lower portion of the movable central pillar, and the locking rods 26 on both sides are
B ', 26B can be smoothly fitted into the restriction holes HB', HB.

If the conical portion of the lock rod 26A is fitted by the contact engagement guide with the peripheral edge of the guide hole, the tip end which is the center of the lock rod 26A is guided by the guide hole H.
It is located 14 mm from the center of A, and the radius amount of the lock rod 26A is 1 from the first maximum deviation position (periphery of the guide hole).
The deviation amount is corrected by 6 mm. In this state, the tips of the lock rods 26B ', 26B on both sides are located in the center direction by 3 mm from the peripheral edges of the corresponding restriction holes HB', HB, and thereafter, the conical inclinations of the lock rods 26B ', 26B on both sides are inclined. The locking rods 26B 'and 26B on both sides can be fitted into the corresponding restriction holes HB' and HB by the contact engagement guide action of the surface and the peripheral edge of each corresponding hole. Therefore, the center pillar locking member 2
6 is accurately locked in a predetermined position together with the movable center column 18 that holds it in the horizontal plane.

In this embodiment, two lock rods 26B ',
Although 26B is used, it is clear that the present invention may have only one. However, two pieces are used to prevent the movable center pillar 18 from rotating around one lock rod due to some external force after locking.
Further, the arrangement of the three holes is sufficient as long as it corresponds to the arrangement of the three lock rods, and does not necessarily have to be arranged on a straight line or at equal intervals as in this embodiment.

A lock rod 26 corresponding to the guide hole HA.
The size relationship with A will be described with reference to FIG. The radius of the hole HA is indicated by R, which is larger than the restriction holes HB ′, HB and is the same size as the restriction holes is indicated by a chain double-dashed line C ″. The lock rod has a radius r ′. In the case of the rod 26A ', if the lower part of the movable center column is biased in the Y direction orthogonal to the X direction, this is caused by the contact engagement operation between the conical inclined surface G'at the tip of the lock rod 26A' and the guide hole HA. Even if the lock rod 26A 'is guided in the direction of the center position of the guide hole HA that eliminates the unevenness, the center of the lock rod 26A' is located closer to the center by a distance r'from the peripheral edge of the guide hole HA. Is outside the circle C ″. Therefore, for example, the regulation hole H
Position of conical tip of lock rod 26B with respect to B (center position)
Is the position of point P ′ in the figure, and cannot be fitted into the restriction hole HB.

On the other hand, in the case where the lock rod is the lock rod 26A having the radius r, the conical inclined surface G and the guide hole HA of the tip portion are provided.
By guiding the lock rod 26A toward the center position of the guide hole HA by the contact engagement action with the lock rod 26A.
The center of A is located closer to the center by a distance r from the periphery of the guide hole HA and is inside the circle C ″. Therefore, the conical tip position of the lock rod 26B with respect to the restriction hole HB is the position of point P in the figure, It can be fitted into the restriction hole HB. This is the same not only in the case of deviation in the Y direction but also in case of the deviation in any direction, and the deviation is reduced until the center of the lock rod 26A comes from the peripheral edge of the guide hole HA onto the circle C. When the tip of the lock rod is conical as in this embodiment, if the value obtained by subtracting the radius r of the lock rod 26A from the radius R of the guide hole HA is less than or equal to the radius of the restriction hole HB, it can be fitted. Of.

In order to fit the lock rods 26B and 26B 'into the regulation holes HB and HB' in this manner, the guide hole HA is used.
When considering the size of the lock rod 26A on the basis of, the predetermined size is necessary, and conversely, when the lock rod 26A is considered on the basis, the size of the guide hole HA is limited. Also,
The guide cone at the front end of the lock rod 26A may be a truncated cone, but in this case, the tip plane of the truncated cone does not contribute to the guide, and the deviation cannot be corrected by the radius of the circular plane.

In the above, the case where the floor has no rails has been described, but the lock mechanism of the present invention can be adopted even when there are rails on the floor, which is not a problem. The deviation exceeding the size of the guide hole HA cannot be absorbed only by the lock mechanism described above, so other measures are taken. Figure 5
Will be described with reference to. An annular guide member 42 (also shown in FIGS. 1 and 2) having an inclined end in the X direction is attached to the lower surface of the movable center pillar 18 so as to surround the three lock rods. There is. On the other hand, on the cover plate 34, receiving members 34A and 34B having a height that can interfere with the guide member 42 but does not interfere with the movable center pillar 18 body are arranged and fixed as shown in FIG. There is.

Therefore, when the lower portion of the movable pillar 18 is largely tilted in the direction of the building I or the direction of the outside O of the building while the movable center pillar 18 is moving in the X direction, the guide member 42 first moves the receiving member 34. It interferes with the receiving surface 34a and is forcibly corrected and moved in the direction of the central position so as to fall within a predetermined deviation amount range, and thereafter, the movable center pillar 18 is locked at the set position by the above-described lock mechanism. A chain double-dashed line 44 indicates a sealing plate, which is fixed to the lock member 26, and descends as the lock member 26 descends so as to seal the gap between the movable center pillar 18 and the floor 22. In order to secure an insertion space for the sealing plate 44, the receiving member is divided into 34A and 34B. Further, the gap between the pair of receiving members 34B is provided in order to facilitate the cleaning of dust because dust is likely to accumulate in this portion.

[0024]

As is apparent from the above description, according to the present invention, even if the position of the lower end portion of the movable center pillar is deviated from the set position, the lock rod protruding downward when the lock member descends. Is guided by the guide hole to reduce the deviation amount thereof, and then the other locking rod can be fitted into the restriction hole, so that the movable center pillar can be smoothly locked.

[Brief description of drawings]

FIG. 1 is a side view of an overhead door structure using a movable center pillar according to the present invention.

FIG. 2 is an enlarged view of a main part as seen from the direction of arrow B in FIG.

FIG. 3 is a plan view of the floor section as viewed from the same direction as the arrow line EE in FIG.

FIG. 4 is a plan view illustrating the operation of the lock mechanism of the present invention.

5 is a plan view illustrating a cross section of the movable center column along a line EE in FIG. 2 and explaining the regulation of the movement of the movable center column.

[Explanation of symbols]

18 movable center pillar 22 floors 26 Middle pillar locking member 26A Lock rod for guide 26B, 26B 'lock rod HA guide hole HB, HB 'regulation hole

Claims (2)

(57) [Claims] 1. A central pillar locking member is provided at a lower portion of the movable central pillar so as to be able to move up and down, and the movable central pillar is moved to a position above a receiving portion provided at a predetermined position on the floor surface, and the central pillar locking member is lowered. A lock mechanism for a movable center column, which locks the movable center column in its position by fitting it into the receiving part, wherein the center column lock member comprises two lock rods extending in the vertical direction, Is configured to reach the receiving portion earlier than the other, and the receiving portion is larger than the size of the tip portion of the one locking rod by a predetermined amount, and the one locking rod is being lowered. And a guide hole that can guide the one lock rod in the direction of the center position by contact engagement with the guide hole, and the guide hole is formed at a position corresponding to the positional relationship between the two lock rods. Acceptable size,
And a restriction hole having a size capable of restricting the movement of the other locking rod in the horizontal plane, and the tip of the other locking rod is
If it is a cone and the tip of the one locking rod is a cone
Is the radius of the guide hole minus the radius of the one lock rod.
Set the value below the radius of the regulation hole,
If the tip of one of the locking rods is a truncated cone,
Value obtained by subtracting the radius of the tip surface of the truncated cone from the radius of the rod
Is less than the radius of the regulation hole.
A locking mechanism for the movable center pillar, which is set so that 2. A middle pillar lock member is lifted up and down on the lower part of the movable middle pillar.
The movable center pillar that can be installed at a predetermined position on the floor
Move it to the upper position and lower the middle pillar locking member.
And insert it into the receiving part, and then move the movable center column to that position.
It is a locking mechanism of the movable center pillar to be locked, Two locks in which the central pillar locking member extends vertically
Equipped with a rod, one of which is earlier than the other with respect to the receiving portion
It is configured to reach,
Remove one and the other of the locking rods provided in the pillar locking member.
The end of the middle pillar in the direction of movement is inclined so that it surrounds
An annular guide member is provided, The size of the tip of the one lock rod
Is a predetermined amount larger than the
The lock rod of the one side is designed toward the center position by the contact engagement.
The guide hole that can be inserted and the two
Placement of the hook rod The other side is formed at a position corresponding to the engagement
Large enough to accept the lock rod of
In addition, the movement of the other locking rod in the horizontal plane can be regulated.
And a hole for regulating the size, and
It can interfere with the annular guide member, and the main body of
A receiving member having a height that does not interfere is provided, and the receiving member is moved.
The moving annular guide member interferes and is forced toward the center position.
It is specially equipped with a receiving surface that can be moved.
A locking mechanism for the movable center pillar to be used.