JPH05162991A - Safety device for elevation transporting device - Google Patents

Abstract

PURPOSE:To lock an elevator carriage and a counter weight which interlocking- rises and lowers with the elevator carriage, through an elevation driving cable such as chain, perfectly and easily, in order to improve the safety in maintenance inspection, as for an elevation transporting device. CONSTITUTION:A driving wheel 11 for driving an elevation driving cable 10b of an elevator carriage or a rotary body 21 which is interlocking-connected with a guide wheel meshed with the elevation-driving cable are installed, and locking holes 26 are formed at the proper intervals in the peripheral direction on the rotary body 21, and locking pins 23 which can be freely inserted and demounted over a range between the pin holes 29 formed on the fixed members 22a and 22b which are contiguously arranged on the rotary body 21 and the locking hole 26 on the rotary body 21 are installed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting / conveying device generally called a drop lifter or a table lifter,
In other words, in the case of lifting and lowering transportation devices used for lifting and lowering transportation means such as transportation trains from one of the travel routes of different levels up and down to the other, and for loading and unloading objects to be transported. The present invention relates to a safety device for completely locking a lifting carriage and a counterweight that moves up and down in conjunction with the lifting carriage in order to enhance safety in the case through a lifting drive rope such as a chain.

[0002]

2. Description of the Related Art This type of elevator transport device is constructed so that a drive wheel that engages with an elevator drive rope of an elevator carriage is rotated forward and backward by a motor to raise and lower the elevator carriage. Generally, since the brake is activated and the drive wheels are locked when the power supply to the motor is cut off, the elevator carriage which is stopped at the time of maintenance inspection or the like is interlocked with this. The counterweight does not drop unexpectedly, but in the unlikely event that the brake attached to the motor breaks down, or another worker accidentally activates the motor and raises or lowers the carriage. If you drive
This results in great danger to maintenance personnel.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and its features will be shown by the reference numerals of the embodiments described later. The safety device of the lifting / conveying device according to the present invention includes a driving wheel (tooth wheel or the like) 11 for driving the lifting drive rope (chain or the like) 10a, 10b of the lift carriage or the lifting drive rope 10a,
Guide wheels (such as tooth rings) 13a, 13b that occlude 10b,
16 and 17 are provided with a rotary body 21 which is interlockingly connected, and the rotary body 21 is provided with locking holes 26 at appropriate intervals in the circumferential direction,
Fixed members 22a, 22b arranged adjacent to the rotating body 21
It is characterized in that a lock pin 23 which can be inserted and removed freely is provided between the pin holes 29 and 30 provided in and the lock hole 26 of the rotating body 21.

[0004]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the accompanying drawings. The lifting and lowering transfer device shown in FIG. 1 has transfer guide rails 1a and 1b installed at a predetermined height above the floor. It is used to transfer a guided train (not shown) that travels on a guided basis to a loading / unloading level of a transported object or another traveling route of a low level. The two columns 3 and 4 standing on the base 2 installed in the above, one elevator carriage 5 that can be raised and lowered along the columns 3 and 4, and the column 3 is raised and lowered between the columns 3 and 4. Possible counterweight device 6 and the lifting carriage 5
And a counterweight device 6 are interlocked with each other in an opposite direction, and ascending / descending driving means 7 is constituted.

A guide rail 8 which is connected to the carrying guide rails 1a and 1b when in the ascending limit position is attached to the elevating carriage 5 through a frame 9 which cantilevers from the elevating carriage 5. The transfer train that has been transferred to the guide rail 8 can be lifted and lowered to a predetermined low level by moving the lift carriage 5 up and down.

As shown in FIG. 2, the lifting drive means 7 has the lifting carriage 5 (more specifically, the frame 9).
The lifting and lowering ropes 10a and 10b such as two circulating upper and lower chains tensioned to move the counterweight device 6 and the counterweight device 6 up and down in opposite directions are engaged with the lower U-turn portion of the lower rope 10b. The drive wheel (tooth wheel or the like) 11 is composed of a speed reducer for driving rotation and a motor 12 with a brake. Reference numerals 13a and 13b are guide wheels (such as tooth wheels) for engaging the lower end U-turn portion of the lower rope 10b with the drive wheel 11. Further, as shown in FIGS. 1 and 2, the frame 9 is provided between the upper ends of the columns 3 and 4.
An upper frame 15 having a projecting frame 14 extending in a cantilever manner above is attached to the upper frame 15 and the projecting frame 14 and the upper rope 10a.
Guide wheels (such as tooth wheels) 16 and 17 for guiding the are supported. Reference numeral 18 denotes a protective case installed on the base 2, in which the drive wheel 11 and the guide wheels 13a, 1 are provided.
3b is pivotally supported.

As shown in FIG. 3, one end of the rotary shaft 11a to which the drive wheel 11 is attached is linked to the output shaft 12a of the motor 12 through a coupling 19, but the other end of the rotary shaft 11a is connected. In its part, a safety device 20 according to the invention
Is installed. The safety device 20 includes a rotating body 21 fixed to the end of the rotating shaft 11a and a rotating body 2
It is composed of two fixing members 22a and 22b, a lock pin 23, and a lock pin holding member 24, which are erected on the base 2 so as to sandwich 1 therebetween. Reference numeral 25 is a case installed on the base 2 to cover the main part of the safety device 20.

More specifically, as shown in FIGS. 4 to 6, arcuate locking holes 26 are provided around the rotating body 21 at equal intervals in the circumferential direction along the circumferential direction. ..
The locking hole 26 may be opened by cutting off between the outer peripheral side edge except the arcuate end portions and the outer peripheral edge of the rotating body 21. The both fixing members 22a and 22b are fixed to both sides of a column 28 that is erected from a substrate 27 mounted on the base 2, and a tip end portion that sandwiches the rotating body 21 is
Two upper and lower pin holes 29, 30 are provided concentrically opposite each other. These two upper and lower pin holes 29, 30
The upper and lower intervals are determined so that the entire upper or lower pin hole overlaps with the locking hole 26 on the rotating body 21 side regardless of the stop angle of the rotating body 21.

The locking pin 23 has a projecting piece 31 integrally projecting at a substantially central position, one of the projecting pieces 31 being an insertion pin portion 23a and the other being a grip portion 23b. The free end of the portion 23b and the lock pin holding member 24 are connected by a rope 32 having an appropriate length. The protruding piece 31 has a shape in which a part of a circular flange concentric with the locking pin 23 is cut off. The locking pin holding member 24 is fixedly provided on the side surface of the support column 28 and has a pin hole 24 into which the insertion pin portion 23a of the locking pin 23 can be inserted.
a is provided.

Reference numeral 33 denotes a retaining means, which is a protruding piece 31 provided on the locking pin 23 and the fixing member 2.
2a and a locking member 34 attached to the outside. The locking member 34 forms a locking groove 34a with the outer surface of the fixing member 22a, and the protruding piece 31 locks the insertion pin portion 23a of the locking pin 23. In a state where it does not face 34,
The pin holes 29, 3 of the fixing members 22a, 22b are extended to the position where the projecting piece 31 comes into contact with the outer surface of the fixing member 22a.
0 and the locking hole 26 of the rotating body 21 are inserted, and then the locking pin 23 is rotated to fit the protruding piece 31 into the locking groove 34a.

When the safety device 20 is not used, the lock pin 23 is held by the lock pin holding member 24. That is, the insertion pin portion 23a of the lock pin 23 is inserted into the pin hole 24a of the holding member 24,
The protruding piece 31 is brought into contact with the holding member 24. When performing maintenance and inspection work on each part with the elevator carriage 5 (motor 12) of the elevator transport device stopped, the lock pin 23 of the safety device 20 is pulled out from the holding member 24 and the fixing members 22a and 22b are removed. Of the upper and lower two-stage pin holes 29 and 30, the one that completely overlaps the locking hole 26 of the rotating body 21 is selected, and the pin holes 29 and 30 and the locking hole 26 of the rotating body 21 are connected to each other. The insertion pin portion 23a of the lock pin 23 is inserted. When the projecting piece 31 comes into contact with the fixing member 22a, the locking pin 23 is rotated to engage the projecting piece 31 with the locking member 34 (locking groove 34a), and the locking pin 23 is unexpectedly moved. Lock it so that it does not fall off.

By using the safety device 20 as described above, the drive wheel 11 is connected and fixed to the base 2 via the rotating shaft 11a, the rotating body 21, the lock pin 23, and the fixing members 22a and 22b. Since the lifting drive rope 10b that engages with the drive wheel 11 cannot rotate, even if the brake built in the motor 12 fails, the lifting carriage 5
There is no risk of the counterweight 6 moving up and down due to gravity. Further, even if another worker mistakenly operates the motor 12, since the drive wheels 11 are locked as described above, the lift carriage 5 cannot be driven up and down, and the torque limiter and the thermal breaker operate. It will be.

The rotating body 21 of the safety device 20 described above
Is not the drive wheel 11, but the guide wheels 13a, 13b, 1
It is also possible to interlock with any one of 6 and 17. Further, the lifting / conveying device that can use the safety device 20 is not limited to that of the above embodiment. For example, as shown in FIG. 7, the lower rope 10b is not provided, and the guide wheel 16 for guiding the upper rope 10a is used as a driving wheel to be linked to a speed reducer and a motor 12 with a brake. I can. Of course, it can also be installed side-by-side in an up-and-down transportation device without the counterweight 6.

A switch for detecting the lock pin 23 held by the lock pin holding member 24 is also provided, and when the switch detects pulling out of the lock pin 23, the power supply circuit of the motor 12 is turned on. If it is configured to be turned off, there is no risk of accidentally operating the motor 12 while the drive wheels 11 and the like are locked using the locking pin 23, and safety can be further enhanced.

[0015]

As described above, according to the safety device of the present invention, the locking hole and the fixing member of the rotating body interlockingly connected to the drive wheel or the guide wheel that engages with the rope for vertically moving the elevator carriage. By inserting the lock pin over the pin hole, the elevator carriage can be completely locked through the drive wheels and the elevator drive rope,
Even if the brake attached to the lifting drive motor fails, or if another operator mistakenly operates the motor, there is no risk of the lifting carriage or counterweight moving up or down unexpectedly. It is possible to sufficiently enhance the safety during work.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of an elevating / conveying device.

FIG. 2 is a schematic side view showing an elevating drive means for an elevating carriage and a counterweight.

FIG. 3 is a cross-sectional plan view showing a configuration around a drive wheel provided with a safety device.

4A is an enlarged plan view of a safety device portion, and FIG. 4B is a side view of FIG. 4A.

FIG. 5 is a partially longitudinal plan view showing an enlarged main part of the safety device.

FIG. 6 is a front view of a lock pin.

FIG. 7 is a schematic side view showing another lifting drive means for the lifting carriage and the counterweight.

[Explanation of reference numerals] 5 lift carriage 6 counterweight 7 lift drive means 10a lift drive rope such as upper chain 10b lift drive rope such as lower chain 11 drive wheel 20 safety device 21 rotating body 22a fixing member 22b fixed Member 23 Locking Pin 24 Locking Pin Holding Member 26 Rotating Body Locking Hole 29 Fixing Member Pin Hole 30 Fixing Member Pin Hole 31 Locking Pin Projecting Piece 33 Lockout Means 34 Locking Member 34a Locking Groove

Claims (4)

[Claims] 1. A rotating body which is interlockingly connected to a drive wheel for driving a raising / lowering drive rope of a raising / lowering carriage or a guide wheel which engages with the raising / lowering drive rope. Locking holes are provided at appropriate intervals in the circumferential direction on the rotating body. And a lock pin that is insertable / removable across a pin hole provided in a fixing member disposed adjacent to the rotary body and a lock hole of the rotary body. 2. The safety device for an elevator / conveyor apparatus according to claim 1, further comprising: retaining means arranged in parallel to prevent the lock pin from coming off in a state where the lock pin is inserted into the lock hole of the rotating body. 3. A projecting piece projecting from the locking pin so that the retaining means contacts the fixing member when the locking pin is inserted into the locking hole of the rotating body. 3. The safety device for an elevator / conveyor device according to claim 2, further comprising: a locking member provided on the fixing member so that the protruding piece engages when the locking pin is rotated in a state. .. 4. The lock pin is configured to be removable from the fixing member, and a lock pin holding member provided with a pin hole into which the lock pin can be removably fitted is also provided. Item 4. A safety device for a lifting / conveying device according to any one of items 1 to 3.