JPH0741271A - Downfall prevention safety device of elevator - Google Patents

Abstract

PURPOSE:To improve safety at a trouble by constituting a downfall preventing safety device so that the upper side part of an elevator chain slackens and a pin capable of advancing or retreating rushes in the hole journaling the extreme end part of the pin on a pillar to prevent the fall of an elevator main body. CONSTITUTION:An elevator is elevatably moved by rotation of a sprocket 5 for elevatable motion provided on an elevator main body and meshing with an elevator chain 4 while upward and downward rollers 1, 2 provided right and left both sides of the elevator main body are respectively rollingly guided along guide rails 3. In this case, a pin journaling tool 12 is fixedly secured on the side part of the elevator main body facing to the guide rail 3, and a pin capable of advancing or retreating is insertedly fitted therein at horizontally advancing and retreating. When the elevator chain 4 is broken off and the upper side part of the chain 4 is slackened, a lever 9 is tilted by the force of a spring 11, the pin capable of advancing or retreating is advanced on the guide rail 3 side through a drive tool 18 and the like, and engaged with one of the many journaling holes formed on the guide rail 3 so as to prevent a downfall of an elevator.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator that moves up and down by the rotation of a sprocket attached to the main body that engages with a chain that is suspended from above, or to suspend the main body with a cable that engages with the upper portion of the main body in a fishing bottle type. In the case of an elevator that pulls up or down while lowering it, stop the drop movement of the elevator immediately on the spot so that there is no accident that the chain or cable is cut or disconnected and the elevator does not crash. Safety device.

[0002]

2. Description of the Related Art Conventionally, as a safety device for preventing a fall accident of an elevator, two eccentric gears attached to the main body are moved from both sides of a column by a spring biasing force when a cable is cut and the elevator is about to fall. There is something that prevents the elevator from falling by digging into the shape, but the equipment is large and the structure is complicated, so it is difficult to use for a light elevator that is used in a private house. is there.

[0003]

Therefore, by developing a simple safety device for fall prevention that can be easily installed in a relatively small and convenient elevator that can be used even in a private house, the use of the elevator is further expanded. The purpose is to do so.

[0004]

According to the present invention of claim 1, left and right guide rails (3) are provided with upper and lower rollers (1) and lower rollers (2) on the left and right sides of the elevator body. ), Which is movably attached to them, and which engages with the lifting chains (4) stretched up and down, and which is lifted and lowered through the rotation of the lifting sprocket (5) attached to the lifter body. An upper part of a transmission chain (8) suspended between a driven sprocket (6) to be rotated in cooperation with the lifting sprocket (5) and a driving sprocket (7) entwined with a drive source A lever (9) whose one end edge is in contact with the lower surface is axially installed in the elevator body, and the one end edge always pushes up the upper part of the transmission chain through the biasing force of the spring (11). To

When the upper or lower part of the transmission chain is loosened due to a cutting accident of the lifting chain or the transmission chain, the urging force of the spring associated with the loosening causes the one edge portion of the lever to move. The push-up / retractable pin (1) is lifted up while pushing up the upper part of the transmission chain, and then the rotation of the lever (9) itself corresponding to the lifted amount.
3) Pin support (12) fixed to the elevator body part
While making the tip of the pin move forward from the front edge of the elevator body while holding the pin, the multiple pin tips are supported at a position close to the front edge of the elevator body facing the pin. This is a safety device for preventing a fall of an elevator, in which an elevator support pillar (15) having holes (14) provided intermittently in the upper and lower direction is arranged parallel to the guide rail (3).

In order to advance the retractable pin (13) forward of the elevator main body through the rotation of the lever (9), in addition to mechanical means as in Embodiment 1 described below, for example, a valve shaft of a solenoid valve is used. It goes without saying that any appropriate means such as forward movement means by electric operation or forward movement means by hydraulic pressure can be adopted. .

The guide rail (3) and the elevator support column (15) may be integrated together as in the following first embodiment, or they may be separately provided as in the second embodiment. May be provided as. Further, the pin tip support hole (14) may be a square front face as shown in the drawing, or may be an appropriate shape such as a circle or an ellipse.

According to such a fall prevention safety device, the driven sprocket (7) rotates the driven sprocket (6) while the lifting sprocket (5) is engaged with the lifting chain (4). While the elevator body is being raised or lowered, the lifting sprocket to support the weight of the elevator body that tries to fall naturally, and the driven sprocket that should rotate in cooperation with it, always has a rotational force that opposes the weight. The upper part of the transmission chain is always kept in tension (and the lower part of the chain is always relaxed) because it must be applied from the drive sprocket via the transmission chain. Therefore, the lever (9) whose one end edge is in contact with the lower surface of the upper part of the chain always resists the urging force of the spring (11) to keep the chain in tension. Side while a state edge is pushed down by.

When an accident occurs in which a portion of the lifting chain above the lifting sprocket is cut off, the lifting machine body begins to fall with a part of the lifting chain and supports the weight of the lifting machine body. Since the rotational force to be applied from the driving sprocket to the driven sprocket of FIG.
As shown by the dashed line, the upper part of the transmission chain becomes loose and the lever (9) itself whose one edge is pressed by the lower surface of the upper part of the chain is moved by the urging force of the spring (11). As shown by the arrows in FIG. 1 and FIG. 2, the upper part of the chain is rotated so as to push it up, whereby the retractable pin (13) advances forward of the front end edge of the elevator body via the pin support (12). The pin tip is made to project into one of the pin tip bearing holes (14) of the elevator support column, and the pin tip is locked at the lower edge of the bearing hole so that the elevator body falls. It will come to a stop on the spot.

Further, even when the transmission chain (8) is cut, the weight of the elevator main body is no longer supported by the driven sprockets, and the elevator main body follows the elevator chain and begins to fall abruptly. , At that time, as a matter of course, since the upper part of the chain that holds down one end of the lever (9) is no longer present, the lever itself is rotated by the urging force of the spring, and is similarly movable back and forth. The pin (13) is moved forward so that the tip of the pin (13) is pushed into the pin tip end support hole (14) of the elevator support column to stop the drop of the elevator body on the spot.

According to the second aspect of the present invention, the upper roller (1) and the lower roller (2) on the left and right sides of the elevator main body are freely movable along the left and right guide rails (3) arranged vertically. In an elevator which is engaged and which is suspended by a cable (21) from above and elevated by raising and lowering the cable, a cable hooking device (22) is partially provided and a pin (23 )
While the rotating body (24) having a protruding portion is axially installed in the vicinity of the front end edge of the elevator main body, the rotating body is rotated and its pin is moved toward the front of the elevator main body when the pin is directed. The tip portion should protrude forward of the front edge of the elevator body.

A spring (25) for urging the pin to rotate the pin from the bottom to the front of the elevator main body is provided between the rotating body and the elevator main body, and the pin is attached to the front of the elevator main body. While a stopper (26) is provided to prevent rotation beyond the direction-oriented position, a large number of pin tip bearing holes (14) are provided at a position approaching the elevator machine front end edge facing the pin. A safety device for preventing a fall of an elevator, wherein elevator support columns (15), which are intermittently provided up and down, are arranged parallel to the guide rails (3).

The guide rail (3) and the elevator support pillar (15) may be integrated or may be separate members, and the pin tip end support holes (14) may have various front shapes. The above is also applicable as described above.

In the case of this elevator safety device, when an accident occurs in which the cable (21) is cut, the weight of the elevator main body pulls it from above against the urging force of the spring (25) during normal lifting. Cable retainer (2
The rotating body (24), in which 2) is directed upward and the pin (22) is directed substantially downward, automatically pushes the pin as shown by the chain line in FIG. 6 by the biasing force of the spring. It rotates in the direction to point the front of the elevator body until it is stopped by the stopper (26), and at the same time, the pin tip projects into one of the pin tip bearing holes (14) of the elevator support column (15). As a result, the elevator main body is supported by the lower edge of the support hole, and the elevator is prevented from falling.

The inventions of claims 1 and 2 are not limited to vertical elevators, but can also be applied to elevators that must be moved up and down in an oblique direction to replace stairs in a private house. Needless to say.

[0016]

Example 1 As shown in FIGS. 1, 2, 3 and 4,
Upper rollers (1) on the left and right sides of the elevator body
The lower roller (2) is vertically movably engaged with each of the left and right guide rails (3) that are vertically arranged and integrally formed, and is vertically stretched and lifted. For an elevator that moves up and down through the rotation of the lifting sprocket (5) of the elevator body that engages with the lifting chain (4) guided by the upper and lower chain guide rollers (33) attached to the main body A driven sprocket (6) coaxial with the sprocket and adapted to rotate synchronously in synchronization with each other, and a driving sprocket (7) connected to a drive shaft of a motor with a reduction gear.
While a roller chain as a transmission chain (8) is hung between and, a small roller rotatably mounted on one end edge of the lever (9) is rotatably mounted on the lower surface of the upper part of the roller chain. While abutting on the lever, the lever itself is rotatably provided on a part of the elevator body via a rotary shaft (20) integrated with the lever.

A pin drive in which a passage (16) for an ascending / descending chain is formed in the center of a plate body having a U-shaped cross section, and vertically elongated holes (19) are formed in the upper portions of both sides. The tool (18) is integrated with the lever (9) and the rotary shaft (20) of the one body, is provided inside the elevator body, and the spring (11) which is always biased in the contracting direction is abbreviated as the pin driving tool. The lever (9) is attached between the lower end portion (of course, it may be the other edge portion of the lever, that is, the lower end portion) and a part of the elevator body, and a lever (9) integral with the pin driving tool is used to keep the lever constant. On the other hand, a small roller at the edge portion pushes the upper side of the transmission chain upward.

A longitudinal slot (17) is formed in each of the left and right side walls of the elevator body, and the vertical slot (19) is formed in the longitudinal slot (19).
And a pin drive shaft (10) is inserted through the elongated holes, and a pin push rod (31) is integrated with the pin drive shaft at a substantially central portion thereof. A pin (1) slidable in a pin hole of a pin support (12) fixed near the front edge of the main body.
3) is inserted and the base portion is connected to the tip end portion of the pin push rod (31) through an appropriate universal joint (32), so that the spring (11) is released when the upper portion of the transmission chain is relaxed. Immediately due to the contracting force of the lever (9)
The one end edge portion of the transmission chain, which is in contact with the lower surface of the upper portion of the transmission chain, rises in accordance with the amount of relaxation, and the rotation of the rotation shaft of the lever itself in accordance with the amount of increase is the same pin drive tool (1
8) is entangled with the rotation of the pin drive shaft (10) and slides in the elongated holes (17) (19) of the pin drive shaft (10).
1) The movement of the elevator main body in the forward direction is entangled, and the movement is further reciprocally caused by the forward and backward movement of the pin (13) such as the chain line in FIGS. To do so.

In the universal joint (32) described above, if the position of the pin support member (12), and further the pin hole thereof, is suitable so as to match the forward and backward direction of the pin push rod (31), It goes without saying that it is not always a necessary component, and it may be replaced by a suitable fixed joint.

Further, a large number of front rectangular pin tip support holes (14) extend vertically at a position near the front end of the elevator body facing the forward and backward retractable pins at the rear of the guide rail (3). This is a safety device for preventing a fall of an elevator, in which an elevator support pillar (15) which is intermittently provided is integrally provided along the guide rail (3).

In such a safety device, when the transmission chain or the lifting chain is disconnected or comes off, as described above, immediately the upper portion of the transmission chain is loosened as described above, and the tip of the retractable pin is retracted. The part projects into the pin tip bearing hole of the column and is supported by the lower edge of the hole to prevent the elevator body from falling. In addition, reference numeral (35) in the drawing denotes a housing of a motor with a reducer for driving a drive sprocket of the elevator body, and (3)
4) shows a mount for a person or an article.

[0022]

[Embodiment 2] As shown in FIGS. 5 and 6, roller shafts (36) extending in the left and right directions above and below the front end edge of the elevator body are rotatably provided, and upper and lower rollers (1) ) And lower rollers (2), and these rollers can be moved along guide rails (3) having a U-shaped cross section, which are vertically arranged on the left and right sides of the elevator body. The two bearing parts (3
7) is fixed to the left and right of the center of the front end edge of the elevator body, and a cable hook (2) is provided in part between the bearings.
The thick disk-shaped rotating body (24) provided with (2) is provided so as to be integrated with the upper roller shaft (36), and then the cable (21) is hooked to the cable hook (22). Then, in the elevator which is lifted and lowered by hanging the cable from above and raising and lowering the cable, a pin (23) is provided so as to project from just the facing surface portion of the cable locking member of the rotating body, and the rotation thereof is performed. When the body is rotated and the pin is directed in the front direction of the elevator main body, the tip end portion of the pin can be projected further forward than the front end edge of the elevator main body.

A pin is provided between the upper roller shaft which is integral with the rotating body (24) and one bearing portion of the roller shaft which is integral with the elevator main body so that the forward direction of the elevator main body is always maintained from below. A spring (25) for urging the upper roller shaft to rotate so as to direct it is provided, and a position where the pin points in the forward direction of the elevator body is provided between the shoulders of the left and right bearings (37). A rod-shaped stopper (26) is fixed in a bridging shape to prevent over-rotation.
Then, a large number of front rectangular pin tip support holes (1
4) is a safety device for preventing a fall of an elevator, wherein an elevator support column (15) having a rectangular cross section, which is intermittently provided in the upper and lower parts, is provided in parallel with the guide rail (3).

In this safety device, when an accident occurs in which the cable is cut or comes off while the elevator is moving up and down along the guide rail, the cable hook (22) is urged by the spring (25). The force of pulling the cable upwards against the cable is eliminated, and as shown by the chain line in Fig. 6, the rotating body directs the cable hook toward the rear of the elevator main body and the pin toward the front of the elevator main body by the urging force of the spring. Direction and until the pin is stopped by the stopper, rotate the pin tip to the pin tip bearing hole (14) of the elevator bearing column.
Of the pin, and the pin tip at the lower edge of the hole, and by extension, the elevator is stopped to stop the drop on the spot.

In this embodiment, the upper roller shaft (36) is used as the rotating shaft integrated with the rotating body (24). For example, the upper roller shaft is provided on the lower surface side of the elevator body. Like the lower roller shaft, it should be installed separately from the rotating shaft of the rotating body, and the spring (2
5) may be interposed between a rotating body which is separate from the upper roller shaft or a rotating shaft which is integrated with the rotating body and a part of the elevator body such as a bearing portion thereof, and When the spring is provided between the rotating body itself and the elevator main body, the rotating body may not be integrated with the rotating shaft and can be freely rotated around the rotating shaft. Needless to say.

[0026]

As described above, according to the safety device of the present invention, it has a reliable function of immediately stopping the elevator on the spot when a chain or cable is cut or accidentally disconnected, and the structure is Because it is simple, it is not only suitable as a safety device for a light elevator for personal residences, but also a convenient safety device for other various elevators, and the effect of improving elevator safety and expanding utilization is large.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of an elevator equipped with an embodiment of the present invention.

FIG. 2 is a perspective view of a main part of an elevator body including the embodiment of FIG.

FIG. 3 is an enlarged plan view of a main portion of a front end edge portion of a lift body including the embodiment of FIG.

FIG. 4 is an enlarged perspective view of a main part of a lever portion, a pin driving tool, and a retractable pin portion of the embodiment of FIG.

FIG. 5 is a partially cutaway perspective view of an elevator equipped with another embodiment of the present invention.

FIG. 6 is an enlarged perspective view of a main portion of a bearing portion and a rotating body portion of the upper roller shaft of the embodiment of FIG.

[Explanation of symbols]

 3 Guide rail 4 Elevating chain 5 Elevating sprocket 6 Driven sprocket 7 Drive sprocket 8 Transmission chain 9 Lever 11, 25 Spring 12 Pin support 13 Extendable / retractable pin 14 Pin tip support hole 15 Elevator support stanchion 18 Pin drive tool 21 Cable 22 Cable hook 23 Pin 24 Rotating body 26 Stopper 33 Chain guide roller 36 Roller shaft 37 Bearing section

Claims (2)

[Claims] 1. An upper roller (1) and a lower roller (2) on both left and right sides of an elevator body are movably provided along guide rails (3) arranged on the left and right sides, respectively, and are vertically movable. In a lift that is engaged with a lifting chain (4) stretched over the elevator and that is lifted and lowered through the rotation of a lifting sprocket (5) attached to the lifter body, the driven sprocket (5) should be rotated in cooperation with the driven sprocket (5). A lever (9) whose one edge is in contact with the lower surface of the upper part of the transmission chain (8), which is hung between the driving sprocket (6) and the driving sprocket (7) entwined with the drive source, has a lift body (9). While being axially installed on the shaft, the one edge portion always pushes the upper part of the transmission chain upward through the urging force of the spring (11) and responds to the looseness of the upper part of the transmission chain. Urging force of the spring By pushing up the upper part of the transmission chain at the one edge of the lever,
By extension, rotation of the lever itself corresponding to the amount by which the lever is raised allows the forward and backward movable pin (13) to move through the pin support (12) fixed to a part of the elevator main body, and the tip of the pin is fixed. The forward end of the elevator body is moved forward, while a large number of pin tip bearing holes (14) are intermittently provided vertically at a position close to the elevator body front edge facing the pin. Elevator support column (1
5) A safety device for preventing a fall of an elevator, characterized in that the guide rail (3) is arranged in parallel with the guide rail (3). 2. Upper and lower rollers (1) and lower rollers (2) on both the left and right sides of the elevator body are movably mounted along the left and right guide rails (3) arranged along the upper and lower guide rails (3). In an elevator that is lifted by a cable (21) while being suspended by a cable (21), a cable hook (22) is partially provided, and a pin (23) is projectingly provided on a substantially opposing surface portion thereof. When the rotating body (24) is axially installed on the front end edge of the elevator body and the rotating body is rotated to pin the pin to direct the forward direction of the elevator body, the tip end of the pin is attached to the elevator body. A spring (25) that projects forward from the front edge and that urges the pin between the rotor and the elevator body so as to always rotate the pin in the forward direction of the elevator body from below.
And a stopper (26) for preventing the pin from rotating beyond the position in which the elevator body is directed in the forward direction, while the elevator body is approached to the elevator body front end facing the pin. Elevator supporting column (15), in which a large number of pin tip bearing holes (14) are intermittently provided in the upper and lower positions, are arranged in parallel with the guide rail (3). Safety device for fall prevention