KR20070008078A - Lifter safety device for automatically opening and closing safety net - Google Patents

Abstract

A safety device automatically opening and closing a safety net for a lifter is provided to keep a passage for the lifter open when moving up and down by installing a gear unit on a mast and a gear and chain on a safety net support frame. A safety device automatically opening and closing a safety net for a lifter comprises a rack gear(1) mounted at one side of the lifter; a first spur gear(2) supported by an axis to interlock the rack gear, and installed to perform as an idle gear; a first beveled gear(4) separated from a shaft of a second spur gear(3) interlocking the first spur gear; a second beveled gear(5) interlocking the first beveled gear and changing the direction of a driving shaft(13) to the vertical direction; a third beveled gear(6) mounted on the same shaft with the second beveled gear, and installed above the second beveled gear driving a transferring net unit of horizontal support frame side; a fourth beveled gear(9) mounted on the upper unit of the same shaft with the second and the third beveled gears to withdraw the safety net when the lifter goes up; a third spur gear(11) mounted on the same shaft with the fifth beveled gear(10) interlocking the fourth beveled gear to interlock the rack gear of the lifter; a sixth beveled gear(12) interlocked the third beveled gear, and installed on the same shaft with a driving sprocket(8) for driving the transferring net unit; and a slave sprocket(19) connected to the driving sprocket driven by the sixth beveled gear with a chain.

Description

Elevator safety device to open and close the safety net automatically {LIFTER SAFETY DEVICE FOR AUTOMATICALLY OPENING AND CLOSING SAFETY NET}

1 is a side view of the elevator safety device of the present invention.

Figure 2a shows the gear group installed on the master side to be driven by the rack installed in the elevator of the present invention, and the chain portion installed in the safety net support frame to interlock with the gear group, the safety net by the elevator before the elevator passes the safety net Exploded view showing open.

FIG. 2B is an exploded view of the operating state as shown in FIG. 2A but showing that the safety net is closed back to its original state after the elevator has passed through the safety net;

3 is a plan view showing a state in which the safety net is opened by the operation of Figure 2a.

Figure 4 is a plan view showing that the safety net is returned to the closed state by the operation of Figure 2b.

Figure 6 is a front view showing the structure of the pinion gear coupled to the shaft of the driven sprocket driving the safety net and the rack gear installed at the bottom of the safety net.

Figure 7 is a side view showing that the safety net is moved to the left and right by the operation of the pinion gear coupled with the rack gear of the safety net.

8 is a side view showing that the safety net is lifted upward by the power shut-off device.

※ Explanation of codes for main parts of drawing

1: rack gear 2: first spur gear

3: Jasper Gear 4: First Bevel Gear

5: Bevel Gears 6: Third Bevel Gears

7, 13, 15: axis 8: drive sprocket

9: 4th Bevel Gear 10: 5th Bevel Gear

11: Jasper Gear 12: 6th Bevel Gear

19: driven sprocket 21: rack gear

23: Pinion gear 30: Power transmission blocking means

31: handle 32: cam

M: Mast MN: Transport Network

S: limit switch

The present invention relates to an elevator safety device that automatically opens and closes a safety net. In particular, a gear group meshing with a rack gear of an elevator is installed on the mast side, and gears and chains interlocked with the gear group of the mast support a safety net for falling objects. It is installed on the safety net support frame to the elevator safety device that the safety net is automatically opened and closed safely when the elevator is raised and lowered.

Conventional elevator safety device is the Republic of Korea Utility Model Registration No. 20-0269290 developed and registered by the applicant of the present invention.

This elevator safety device can open and close the safety net at the time of lifting and lowering of the elevator (LIFTER) without separately using a motor for driving a drop prevention safety net (transport network). However, the chain was used as a driving means for driving the safety net. When the chain is frequently used, the chain is sagging, which causes the hassle of checking the chain and adjusting the tension of the chain.

In addition, when the chain is operated in a stretched state, the transport of the safety net cannot be accurately made, and thus there is a problem that the safety of the elevator is lowered when the elevator is lowered.

The present invention was developed to solve the above conventional problems, an object of the present invention is to provide a safety device for an elevator that can be accurately transported safety net.

Another object of the present invention is to provide a safety device for an elevator that is convenient to use because there is no need to adjust tension like a chain.

Still another object of the present invention is to provide a safety device for an elevator that can keep the elevator passage open by blocking power transmission of a safety net that is opened when the elevator is lifted or lowered.

This object of the present invention is achieved by installing a gear group coupled to the shaft to the mast to be driven by the rack gear of the elevator, and installing the gear and chain linked thereto to the safety net support frame.

In addition, by providing a cam at the lower side of both sides of the safety net, by connecting the cam to the shaft to rotate, such as by lifting the safety net upward, the transmission of the transmission network is blocked to achieve.

Elevator safety device of the present invention is installed on the moving path of the elevator (L) to be moved up and down along the base (M) installed adjacent to the balcony of the structure and the rectangular transport network (MN) of the elevator during the lifting operation of the elevator movement In the safety device of the elevator to open or block the moving passage of the elevator by

Rack gear (1) provided on one side of the elevator (L),

A first spur gear 2 supported by the shaft to engage the rack gear 1 and acting as an idle gear;

A first bevel gear (4) spaced apart from the shaft (13) of the second spur gear (3) meshing with the first spur gear (2),

A second bevel gear 5 engaged with the first bevel gear 4 to convert the direction of the driving work axis to a right angle,

A third bevel gear (6) installed on the same axis (7) as the second bevel gear (5) and installed above the second bevel gear (5) so as to drive the feed net portion (MN) on the horizontal support frame side;

A fourth bevel gear 9 installed at the upper side with the same shaft 7 as the second and third bevel gears 5 and 6, which serves to retract the safety net MN when the elevator moves upward;

Like the first bevel gear 4 and the spur gear, the fifth bevel gear 10 meshed with the fourth bevel gear 9 so as to be engaged with the rack gear 1 of the elevator, and the third spur gear provided on the same axis ( 11),

A sixth bevel gear 12 installed with the same shaft 15 as a driving sprocket 8 that meshes with the third bevel gear 6 to drive the transport network portion MN;

It is characterized in that it consists of a driven sprocket 19 is connected to the drive sprocket 8 driven by the sixth bevel gear 12 in a chain.

The chain drive sprocket 8 for moving the conveying net section MN is preferably installed at the other side of the safety net. Correspondingly, driven sprockets 19 are preferably installed on both sides of the transfer net.

In addition, it is to install a limit switch (S) that can stop the elevator by detecting the contact with the transfer network (MN) at a predetermined height in the upper and lower parts of the elevator to detect the malfunction of the elevator in order to prevent safety accidents in advance. desirable.

Such a safety device for a construction elevator of the present invention will be described in more detail with reference to the accompanying drawings.

In the elevator safety device of the present invention, a rack gear 1 is installed at one side of the elevator, and the first spur gear 2 driven by the rack gear 1 is installed at the mast M. The first spur gear 2 meshes with the second spur gear 3 provided together with the shaft 13 supporting the first bevel gear 4.

The first spur gear 2 serves as an idle gear for changing the direction of the first bevel gear 4, and the second spur gear 3 is driven as the first spur gear 2 is driven during the lifting of the elevator. Is rotated, and the first bevel gear 4 installed on the same axis is rotated to the left in the drawing.

The first bevel gear 4 meshes with the second bevel gear 5 installed at an upward right angle to continuously transmit the driving force driven at the time of lifting the elevator upward.

The second bevel gear 5 has a third bevel gear 6, which serves to open the transfer net portion MN, and a fourth bevel gear 9 on the same shaft to close the transfer net portion MN when the elevator is lifted. (7) is installed.

The fourth bevel gear 9 has a fifth bevel gear 10 and a third spur gear (10) to be engaged with the rack gear 1 in the same manner as the first bevel gear 4 and the second spur gear 3. 11) is supported by the same shaft 16 to engage the fifth bevel gear 10 to be driven by the fourth bevel gear (9).

Meanwhile, the third bevel gear 6 meshes with the sixth bevel gear 12, and the driving sprocket 8 spaced apart on both sides with the same shaft 15 as the sixth bevel gear 12 is a chain mesh part MN. It is connected to the driven sprocket (19) meshing with the rack gear (21) of. The rack gear 21 of the transfer net section MN is installed inside the driven sprocket 19.

Drive sprocket (8) and driven sprocket (19) is connected to the chain serves to open or close the transport network (MN), the pinion coupled to one shaft (15) inside the driven sprocket (19) Since the rack gear 21 of the transfer network portion MN is engaged by the gear 23, the safety net is interlocked and moved according to the rotation of the sprockets 8 and 19.

When the elevator is moved upward from the lower part of the conveying net part MN, the chain is driven by a gear group of spur gears and bevel gears driven by the rack gear 1 so that the conveying net part is opened and the elevator passes. In addition, the fourth gear bevel gear driven by the fifth bevel gear 10 by driving the third spur gear 11 which is the same shaft 16 as the upper fifth bevel gear 10, the rack gear (1) The rotation direction of (9) is reversed to the rotation direction when the elevator is raised.

Therefore, when the elevator rotates and drives the third spur gear 11 through the transport network portion MN, the rotation direction of the sixth bevel gear 12 connected to the third bevel gear 5 is also changed in the opposite direction. As a result, the rotational direction of the chain is also changed, and the transport network part MN, which has been opened, is returned to its original state to close the moving passage of the elevator.

On the other hand, the upper and lower parts of the elevator (L) is provided with a limit switch (S) to determine whether or not the contact of the transport network. The limit switch S is a safety device that immediately stops the operation of the motor driving the elevator when it comes in contact with the transport network N when the elevator moves up and down. In advance, the limit switch S is prevented from colliding with the transport network MN during the elevation of the elevator. It is to prevent on.

In addition, the inner side or the outer side of the pinion gear 23 for moving the safety net of the elevator power transmission blocking means 30 including a cam 32 is rotated by rotating the handle 31 so as to lift the transfer net upward. ) Is installed. The cam 32 of the power transmission blocking means 30 serves to lift the transfer net portion MN upward so that the transfer gear portion MN is released from the engagement of the rack gear 21 with the pinion gear 23. As it is, the cam 32 of the power transmission blocking means 30 is preferably installed on both sides of the transfer network portion (N) so that both sides of the transfer network portion (MN) can be lifted at the same time. After the transfer network unit MN is moved to the open state by the power transmission blocking means 30, that is, by operating the handle 31, the transfer network unit MN and the rack gear 21 thereof by the cam 32. ) Is lifted upwards to block power transmission between the drive means of the elevator and the transfer network (MN) so that the open passage continues to open and then the long object can be simply carried by the lift.

Elevator safety device of the present invention configured and operated as described above by installing the gear group driven by the rack gear (1) in conjunction with the sprocket of the chain does not need to adjust the tension of the chain as in the prior art, it is necessary to check frequently It is a very useful invention having the effect of increasing safety because the durability is greatly increased and the opening and closing of the transport network is more surely made.

Claims (5)

It is installed on the moving path of the elevator (L) which is lifted along the base (M) installed adjacent to the balcony of the structure, and when the lifting operation of the elevator (L), the rectangular transport network opens or moves the elevator passage by the movement of the elevator. In the safety device of an elevator to block, Rack gear (1) provided on one side of the elevator (L), A first spur gear 2 supported by the shaft to engage the rack gear 1 and acting as an idle gear; A first bevel gear (4) spaced apart from the shaft of the second spur gear (3) meshing with the first spur gear (2), A second bevel gear 5 engaged with the first bevel gear 4 to convert the direction of the drive shaft 13 to a right angle, Third bevel gear (6) installed on the same shaft (7) as the second bevel gear (5) and connected to the same shaft (7) above the second bevel gear (5) for driving the feed net on the horizontal support frame side. Wow, A fourth bevel gear 9 installed at the same axis as the second and third bevel gears 6, and serving to retract the safety net when the elevator moves upward; Similar to the first bevel gear 4 and the spur gear, the fifth bevel gear 10 meshes with the fourth bevel gear 9 so as to engage with the rack gear 1 of the elevator, and the same shaft as the gear 10. A third spur gear 11 installed with 16), A sixth bevel gear 12 installed coaxially with a drive sprocket 8 that meshes with the third bevel gear 6 to drive the feed net portion MN; Elevator safety device for automatically opening and closing the safety net, characterized in that consisting of a driven sprocket (19) connected by a chain to the drive sprocket (8) driven by the sixth bevel gear (12). The method of claim 1, Elevator safety device for automatically opening and closing the safety net, characterized in that the upper and lower limit of the elevator (L) is installed at a predetermined height limit switch (S) for detecting the contact of the transport network (MN). The method of claim 1, Lifting device (MN) is an elevator safety device for automatically opening and closing the safety net, characterized in that the rack gear 21 is formed on the lower side, is transferred by a pinion gear (23) formed inside the driven sprocket (19). The method of claim 3, Automatically opening and closing the safety net, characterized in that the power transmission blocking means 30 is installed to lift the transfer network portion (MN) upward to release the meshing of the rack gear 21 and the pinion gear 23 of the transfer network portion (MN). Lift safety device. The method of claim 4, wherein Power transmission blocking means 30 is a lift safety device for automatically opening and closing the safety net, characterized in that it comprises a cam 32 and the handle 31.

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