JP3751950B2 - Locking device for guide shaft - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a guide shaft locking device that locks a guide shaft that moves up and down along a guide column at a predetermined position of the guide column.
[0002]
[Prior art]
Conventionally, in order to lock the guide shaft at a predetermined position of the guide column, the guide shaft and the guide column are integrally fixed by a pin or the like.
However, if the position to be locked is high, the operation is dangerous and very difficult.
Therefore, as a device for solving this problem, a movable shaft locking device of Japanese Patent No. 2625522 has been proposed.
[0003]
[Problems to be solved by the invention]
In the above device, the fixed bracket is rotated only by moving the movable shaft, and the movable shaft is locked to and released from a predetermined position of the guide rail. It must be moved to escape from the fixture, and requires an operation to move the movable shaft greatly.
[0004]
In view of the above, the present invention is intended to provide a guide shaft locking device capable of locking a guide shaft at a predetermined position of a guide column with a simple operation.
[0005]
[Means for Solving the Problems]
In order to solve the above-described problems, the locking device for the guide shaft of the present invention is a locking device for locking the guide shaft that moves up and down along the guide column to a predetermined position of the guide column, and the guide column is parallel to the guide shaft. A supporting plate is provided, and a locking plate that is rotatable in a direction perpendicular to the supporting shaft is provided. The locking plate is formed with an opening that faces downward toward the guide supporting shaft with respect to the supporting shaft in a free state. A release arm that hangs down from below the support shaft is formed on the side of the opening that is continuous with the upper edge of the opening, and an internal angle of the side opposite to the opening release arm. An upper semicircular arc portion that engages with the upper side of the outer periphery of the guide shaft is formed in the portion, and the lower side of the outer periphery of the guide shaft is locked downward to the side of the opening continuously from the upper semicircular arc portion. A side semicircular arc part is formed on the inside, and a collar part with the tip part facing inward is formed. An inclined part is formed on the outer side of the lower semicircular arc part from the tip of the part, the shortest distance between the tip of the collar part and the release arm part, and the shortest distance between the tip of the collar part and the upper edge part are It is formed longer than the diameter of the guide shaft, and the inclined portion is formed so that the locking plate rotates in a direction in which the upper semicircular arc portion moves upward when the guide shaft presses the inclined portion from below. When the guide shaft enters the opening at the time of locking, the upper semicircular arc part does not reach the highest position, and the lower semicircular arc part moves downward in the direction of the guide shaft to release the locking plate. Sometimes when the guide shaft moves away from the lower semicircular arc part and engages the upper semicircular arc part, and the upper semicircular arc part reaches the uppermost position, the center of gravity moves to the opposite side of the guide column with respect to the support shaft. The arm portion rotates in a direction of moving below the guide shaft.
[0006]
With this configuration, when the guide shaft is locked at a predetermined position of the guide column, the guide shaft is raised from the lower side of the guide column toward the opening of the locking plate, and the guide shaft is locked. When the inclined portion of the working plate is pressed and further lifted, the locking plate rotates in the direction in which the upper semicircular arc moves upward, and when the guide shaft comes off the end of the collar and enters the opening, The circular arc part does not reach the uppermost position, and the locking plate rotates in the reverse direction in which the lower semicircular arc part moves below the guide shaft. The guide shaft is slightly lowered and locked.
[0007]
Next, when releasing the locked guide shaft, the guide shaft is lifted from the lower semicircular arc portion to push up the upper edge portion, and the upper semicircular arc portion moves to the support shaft side of the locking plate. The guide shaft engages with the upper semicircular arc portion along the upper edge, and when the upper semicircular arc portion reaches the highest position, the center of gravity moves to the opposite side of the guide column with respect to the support shaft, The locking plate rotates in the direction in which the release arm portion moves below the guide shaft.
[0008]
When the guide shaft is lowered, the guide shaft pushes down the lower release arm, and this time the locking plate rotates in the opposite direction, the guide shaft moves away from the tip of the release arm, The working plate returns to the original free state, and the guide shaft comes out of the opening and is unlocked, so that the guide shaft can be lowered freely thereafter.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a side view showing an embodiment of the guide shaft locking device of the present invention, FIG. 2 is a front view of the same, and FIG. 3 is a plan view of the same.
The device of the present invention is used when a panel such as a lower storage type fence is locked at a predetermined position of a support column. This embodiment is an example when used for a lower storage type snow fence.
[0010]
In FIG. 1 to FIG. 3, reference numeral 1 denotes a guide column vertically installed on a base plate 2. This guide column 1 uses H-shaped steel, and the guide column 1 has a groove 3 on the side surface side. Are arranged with a predetermined interval, with the grooves 3 facing each other.
In the groove 3, the other end side protrudes from the central portion of the roller-shaped guide shaft 6 whose one end is fixed to the uppermost side frame 5 of the panel 4 that can be folded in several steps.
Link plates 7 having a diameter larger than that of the guide shaft 6 are attached to both ends of the guide shaft 6, and the guide shaft 6 moves up and down in the groove 3 by the guide of the link plate 7 in the groove 3.
The guide shaft 6 is moved up and down by a pulley 8 and a wire rope 9 of a winch (not shown), and the guide shaft 6 always moves downward.
In addition, raising / lowering may be performed by a mobile crane vehicle or the like.
[0011]
Reference numeral 10 denotes a support shaft provided in parallel with the guide shaft 6 above the front surface of the support column 1, and this support shaft 10 is attached to a cylindrical body 12 inserted on both side pieces of a U-shaped member 11 fixed to the support column 1 in the lateral direction. It is inserted in a rotatable manner.
[0012]
Reference numeral 13 denotes a locking plate fixed to the end portion of the support shaft 10, and this locking plate 13 is in a freely rotatable state, that is, in a state where the center of gravity is vertically below the center of the support shaft 10. A downward opening 14 is formed on the shaft 3 on the groove 3 side of the guide column 1.
From the lower side of the support shaft 10 to the side of the support shaft 10, the horizontal upper edge 15 extending across the groove 3 from substantially below the support shaft 10 of the opening 14 and extending to the side edge of the guide column 1 is continuous. A hanging release arm 16 is formed.
[0013]
Further, the upper semicircular arc portion 17 that is continuous with the upper edge portion 15 of the opening 14 and is engaged with the inner corner portion of the opening 14 on the side opposite to the release arm portion 16 is in contact with the upper side of the outer periphery of the guide shaft 6. Is formed on the side of the opening 14 continuously to the upper semicircular arc portion 17, and the lower semicircular arc portion 18 on the lower side of the outer periphery of the guide shaft 6 is brought into contact with and locked to the lower side. The flange portion 19 is formed with the tip portion facing inward.
Note that the tip of the collar portion 19 is located above the lower end of the release arm portion 16.
[0014]
Further, the shortest distance between the distal end of the flange portion 19 and the release arm portion 16 and the shortest distance between the distal end of the flange portion 19 and the upper edge portion 15 are formed longer than the diameter of the guide shaft 6. Reference numeral 20 denotes an inclined portion formed on the outer side of the lower semicircular arc portion 18 of the flange portion 19 from the front end of the flange portion 19 downward. When the guide shaft 6 is raised and pressed from below, the inclined portion 20 is The locking plate 13 is formed so as to rotate in the direction in which the upper semicircular arc portion 17 moves upward.
[0015]
Further, when the locking plate 13 is released, when the upper semicircular arc portion 17 moves upward and is positioned at the uppermost position, the center of gravity moves to the opposite side of the guide column 1 with respect to the support shaft 10, and the release arm The portion 16 is configured to rotate in a direction of moving below the guide shaft 6.
[0016]
Next, the operation of the device of the present invention having such a configuration will be described with reference to FIGS.
FIGS. 4A to 4E are operation diagrams showing stages until the guide shaft 6 is locked, and FIGS. 5A to 5F are operation diagrams showing stages until the guide shaft 6 is locked and released.
[0017]
First, the case of locking the guide shaft 6 to the predetermined position of the guide column 1 will be described with reference to FIG.
As shown in FIG. 4A, when the guide shaft 6 pulled up by the wire rope 9 presses the inclined portion 20 of the locking plate 13 from below as shown in FIG. 4B, the locking plate 13 is counterclockwise. As shown in FIG. 4C, when the tip of the flange 19 reaches the vicinity of the side edge of the guide column 1, the guide shaft 6 is disengaged from the tip of the flange 19, but the upper semicircular arc 17 is It has not reached the top.
[0018]
At this time, since the center of gravity is not vertically below the center of the support shaft 10, the guide shaft 6 is disengaged from the flange portion 19, and as shown in FIG. The shaft 6 enters into the opening 14.
If the guide shaft 6 is lowered in this state, the lower semicircular arc portion 18 is located below the guide shaft 6 as shown in FIG. 4E, so that the guide shaft 6 is engaged with and engaged with the lower semicircular arc portion 18. Is done.
[0019]
Next, the case of releasing the locked guide shaft 6 will be described with reference to FIG.
As shown in FIG. 5A, if the wire rope 9 is pulled up from the guide shaft 6 in a state where the guide shaft 6 is locked, the guide shaft 6 pushes up the locking plate 13 as shown in FIG. When the plate 13 is rotated in the counterclockwise arrow direction B and the guide shaft 6 is further raised, the guide shaft 6 engages with the upper semicircular arc portion 17 along the upper edge portion 15 as shown in FIG. 5C.
[0020]
When the guide shaft 6 is engaged with the upper semicircular arc portion 17 and the upper semicircular arc portion 17 is positioned at the uppermost position, the position of the center of gravity moves to the opposite side of the guide column 1 with respect to the support shaft 10, and the locking plate 13 is The release arm 16 is rotated by its own weight in the counterclockwise direction of arrow A, and the release arm 16 is positioned below the guide shaft 6 so as to overlap the groove 3 of the column 1.
If the guide shaft 6 is lowered in this state, as shown in FIG. 5D, the guide shaft 6 pushes down the release arm portion 16, rotates the locking plate 13 in the clockwise arrow direction B, and the guide shaft 6 is further lowered. As shown in FIG. 5E, when the lower end of the release arm portion 16 reaches the vicinity of the side edge of the support column 1, the guide shaft 6 is disengaged from the lower end of the release arm portion 16, and the upper semicircular arc portion 17 is at the highest position. Since the center of gravity is not below the center of the support shaft 10, the locking plate 13 returns to the free state as shown in FIG. 5F.
At this time, the guide shaft 6 escapes from the opening 14 of the locking plate 13 and is lowered below the locking plate 13 because it is below the locking plate 13.
[0021]
As mentioned above, although this invention was concretely demonstrated based on embodiment, this invention is not limited to the said embodiment.
[0022]
【The invention's effect】
As described above, according to the device of the present invention, the guide shaft can be locked and released at a predetermined position of the guide column only by raising and lowering the guide shaft, so that a panel such as a lower storage type snow fence can be locked. If used in such a case, it is safe even at a high place and can be achieved by a simple remote operation.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of the apparatus of the present invention.
FIG. 2 is a front view showing an embodiment of the device of the present invention.
FIG. 3 is a plan view showing an embodiment of the apparatus of the present invention.
FIG. 4 is an operation diagram showing a stage leading to locking of the guide shaft of the device of the present invention.
FIG. 5 is an operation diagram showing stages from locking to releasing of the guide shaft of the device of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Guide support | pillar 6 Guide shaft 9 Wire rope 10 Support shaft 13 Locking plate 14 Opening 15 Upper edge portion 16 Release arm portion 17 Upper semicircular arc portion 18 Lower semicircular arc portion 19 Hook portion 20 Inclined portion

Claims (1)

A locking device that locks the guide shaft that moves up and down along the guide column at a predetermined position of the guide column. The guide column is provided with a support shaft parallel to the guide shaft and can be rotated in the vertical direction with respect to the support shaft. A locking plate is provided, and in the free state, the locking plate is formed with a downward opening on the guide spindle side with respect to the spindle, and the opening side of the opening is continuous with the upper edge of the opening. A release arm that hangs down from below the support shaft is formed on the side of the shaft, and an upper semicircular arc that engages the upper corner of the outer periphery of the guide shaft with the inner corner of the side opposite to the release arm of the opening. A lower semicircular arc part is formed on the inner side of the lower side of the outer periphery of the guide shaft, and the tip part is inward. And an inclined part is formed on the outer side of the lower semicircular arc part from the tip of the collar part. In addition, the shortest distance between the distal end of the collar and the release arm and the shortest distance between the distal end of the collar and the upper edge are formed longer than the diameter of the guide shaft, and the inclined shaft is inclined with respect to the inclined portion. When the part is pressed from below, the locking plate is formed to rotate in the direction in which the upper semicircular arc part moves upward. The locking plate has the guide shaft that enters the opening during locking. Sometimes the upper semicircular arc part does not reach the highest position, the lower semicircular arc part rotates in the direction of moving below the guide shaft, and when released, the guide shaft moves away from the lower semicircular arc part and engages with the upper semicircular arc part. When the upper semicircular arc part reaches the uppermost position, the center of gravity moves to the opposite side of the guide column with respect to the support shaft, and the release arm part rotates in a direction to move below the guide shaft. The guide shaft locking device.

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