JPS638104A - Device for preventing elevator body from dropping - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a fall prevention device for an elevating object,
In particular, it relates to fall prevention GTT of an elevating body that ascends and descends at high speed in a stacker crane.

[Conventional technology]

As shown in Japanese Patent Publication No. 52-49215, the elevating body of the stacker crane has a concave shape. This elevating body is suspended from the front and rear ends of the stacker crane in the running direction by lifting lobes. These two lifting lobes are connected to a lifting drum provided on the crane body. The elevating body moves up and down by driving this drum. Further, there are guide rails on the left and right columns of the crane body, and the front and rear ends of the elevating body move up and down along these guide rails.

The fall prevention devices are respectively installed at the front and rear ends of the elevating body, and grip the guide rails when cutting the hoisting rope to prevent the elevating body from falling.

Each fall arrester operates independently in response to the cutting of the lobe.

Each fall prevention device includes a wedge installed in the gap between the elevating body and the guide rail, a spring that pushes the wedge into the gap, and a joint between the climbing robe and the elevating body that is movable downward. It consists of a coupling part and a connecting member that connects the coupling part and the wedge.

During normal operation, the joint is lifted by the accessorial robe, and the connecting member separates the wedge from the gap. This allows the elevating body to rise and fall.

When at least one of the hoisting lobes is severed, the wedge is pushed into the gap by the spring since there is no longer any force pulling the joint on the side of the cut hoisting lobe upwards. This prevents the elevating body from falling. In addition, the fall prevention bag on the uncut robe side! (<rust) does not operate.

Although not shown in the above publication, the fall prevention device is equipped with an emergency detector that detects the movement of the wedge.
When the detector detects movement of the wedge, the rotation of the hoisting drum is stopped. That is, when one of the hoisting ropes is cut and the wedge on that side moves and enters an operation to prevent the elevating body from falling, the emergency detector detects this and stops the rotation of the hoisting drum. Therefore, even if the elevating object is being raised, the lifting of the elevating object by the uncut hoisting lobe immediately stops.

[Problem that the invention seeks to solve]

The maximum lifting speed of the conventional stacker crane is 25
It is about m/min.

At such low speeds, there is no problem with the operation of the fall prevention device, but it has become clear that, for example, at high speeds of about 70 m/min, inconveniences will occur.0 Cutting the hoisting rope This does not occur when there is a lot of ice, and only one side is often cut. Even if only one of these ends breaks, it is necessary to properly prevent the elevating body from falling.

However, when considering the case where only one of the hoisting ropes breaks during high-speed lifting, the fall prevention device is activated to prevent the lifting object from falling, but the lifting object stops at a large incline. It became clear that it would.

The inclination direction of the elevating body is the longitudinal direction (travel direction of the stacker crane). Because the slope is large, the elevating body may hit the support or guide rail of the crane main body, causing deformation or damage, or the distance between the front and rear supports may become large.
This causes inconveniences such as dropping the cargo on the elevating body.

If one of the hoisting ropes breaks during the ascent, the unbroken hoisting rope becomes the upper one.

If one of the hoisting lobes breaks during descent, the uncut hoisting rope becomes the lower one.

This inclination is thought to be due to the high lifting speed of the elevator.

In other words, the time from when the lobe is cut until the elevating body stops depends on the size of the gap between the wedge and the guide rail, and the time from when the lobe is cut until the emergency detector detects the movement of the wedge. Related to time etc. However, in order to prevent the gap between rust and the guide rail during normal operation, the gap cannot be made smaller.Also, considering manufacturing errors, installation errors, and malfunctions during normal operation, the operating time of the emergency detector can be reduced. There are also limits.

This causes a delay in stopping the drive of the uncut lobes.
The elevating body tilts and stops.

This becomes more noticeable as the lifting speed is higher, the weight of the lifting body is greater, and the length of the lifting body is longer.

An object of the invention is to stop the lifting body in a substantially horizontal position when the winding lobe breaks.

[Means for solving problems]

The above purpose is achieved by adding the conventional 1st and 2nd fall prevention devices installed at the front and rear of the elevating body to the 3rd and 3rd fall prevention devices respectively. A fourth fall prevention device is installed so that the fourth fall prevention device on the rear end side is activated by the operation of the first fall prevention device on the front end side of the elevating body, and the second fall prevention device on the rear end side is installed. This is achieved by providing a third fall prevention device on the front end side that is activated by the activation of the prevention device.

[For production]

For example, if the hoisting lobe on the front end side of the elevating body breaks,
The first fall prevention device detects this and enters a stopping operation.

Further, the operation of the first fall prevention device is transmitted to the fourth fall prevention device on the other end side, and the fourth fall prevention device is activated and enters a stopping operation.

In this way, since the stopping operation is started at both the front and rear ends of the elevating body, the elevating body stops in a substantially horizontal state.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 8.

In FIGS. 1 to 4, la and lb are pillars of the main body of the stacker crane, which are erected on the front and rear end sides (left and right end sides in FIG. 1) of the stacker crane in the traveling direction.

Guide rails 5a and 5b for guiding the vertical movement of the elevating body 10 are attached to the inside of the pillars 1g and lb in the vertical direction.

The elevating body 10 includes a base frame 11 on which a fork (not shown) is installed, and side frames 12a and 12b erected at the front and rear ends, respectively.

Corresponding guide rollers (not shown) are provided at the front and rear ends of the elevating body 10 so as to sandwich the side surfaces of the guide rails 5a and 5b.

The configuration up to this point is the same as the conventional one.

The elevating body 10 of this embodiment includes a side frame 12a.

The upper ends of tzb are connected by upper frames 13a and 13b. The upper frames 13a and 13b are installed in parallel in front and rear in a direction perpendicular to the running direction of the stacker crane.

The upper frames 13a and 13b are composed of pipes.

A hoisting lobe 19a is fed out from a hoisting drum (not shown) installed in the main body of the stacker crane.

19b is suspended from the upper ends of the columns 1a and 1b, and is connected to brackets 21a and 21b of the side frames 12a and 12b. This configuration is the same as the conventional one.

As shown in Figure IJ2 and Figure 5, the side frame 12n
, 12b have rectangular openings Z3a, 23b penetrating in the feeding direction of the stacker crane. Bracket 2
1a and 21b pass through the openings Z (a and 23b, and can be moved in the vertical direction through the openings 23a and 21b. Winding lobes 19g and 19b are connected to the central part of the inside of the brackets 21a and 21b via bolts 5. It is connected.

In order to allow the brackets 21a, 21b to move up and down in a horizontal state, guide doors 26 are provided on both inner surfaces of the openings 23a, 23b. This guide is 26
The surfaces of the guide rails 5a and 5b are in contact with the guides n and 27 provided in the openings Za and 23b. Hoisting robe 19
The brackets 21a and 21b do not tilt because the position of the bolt O that connects the bolts A and 19b is close to the position that supports the side frames 12m and 12b.

At the upper part of the side frames 12a, 12b, there is a first stopper, which corresponds to the conventional fall prevention device. $2 fall prevention device 31j, 3
1b are installed respectively. side frame 12a,
At the bottom of 12b there is a third. Fourth fall prevention device 32a, 3
2b is installed. The fourth fall prevention bag [32b is the first
The first fall prevention bag [31
It is activated by the action of a. Third fall prevention device 32
a is activated by the operation of the second fall prevention bag Hg1b via the second signal transmission member &lb.

1st. The second fall prevention devices 31a and atb will be explained. Since both are substantially the same, the side frame 12
The first fall prevention device if, 31a of a will be explained.

It is installed on a side frame 12g opposite to one side of the guide frame 5a. The first slope of the slope seat is inclined towards the side of the 12m side frame.
The distance between the slope and the side surface of the guide rail 5a is smaller in the upper direction. A bracket 41 is attached to the upper surface of the slope seat, and a lever that rotates in the vertical direction centering on the bottle holder is attached. A wedge-shaped brake I is suspended from one end of the lever so that it can move up and down.

The other end of the lever 6 and the bracket 21a are connected by a rod joint. The hole in the lever 42 at the connection point with the brake element a and the rod 45 is long in the longitudinal direction of the lever.

In steady state, the length of the rod is adjusted so that a predetermined gap Sl can be obtained between the brake brake and the guide rail.

For this reason, the lower end of the rod at the connecting portion to the bracket 21a is a threaded rod.

The other end side of the lever and the side frame 1 on the lower side thereof
A tension spring 47 is provided between the 2m and 2m.

The tension spring 47 pulls the lever 4 so as to pull the brake a upward. A threaded rod 49 is provided between the lower end of the tension spring 47 and the bracket of the side frame 12a to adjust the length of the tension spring 47.

The father is a detector for detecting the rise of the brake element material, and the detector is brought into contact with the lower surface of the brake element I.

When the detector detects the rise of the brake, the rotation of the hoisting drum is immediately stopped.

In Figures 6 and 7, the slope seat is side frame 1.
It is attached to the side of 2a via a bracket group.

The brake element (■) is located between the bracket plate and the front cover 8. The brake member and the slope seat are engaged with each other as shown in FIG. 6, and prevent the brake member (2) from moving toward the guide rail 5a. The brake lever is connected to the lever via a bracket fixed with bolts on the back side.

The lever structure consists of two plates.

A fall prevention device having such a configuration is similarly arranged on the other side of the guide rail 5a. However, the detector is provided only on the -right side (the right side in Figure 2). Further, the first signal transmission member 33a is connected only to the lever 4 on one side (the left side in FIG. 2). Second signal member 33 on the second fall prevention device side on the side frame 12b side
b is provided only on the lever on one side (left side in Figure In3).

The connection point between the lobe 6 of the first signal transmission member 33a and the lever structure will be explained. The distance ll from the pin 42, which is the center of rotation of the lever 4, to the connection point is determined by the brake U from Pin Co.
Distance l to the connection point! Thicker than 2 11 ・I O 3rd. The fourth fall prevention device will be explained.

Since both are substantially the same, the third fall prevention device on the side frame 12a side will be explained.

A slope dust 40a, a brake 44a, and a detector 50a are installed only on one side (the right side in FIG. 2) of the guide rail 5a. The attachment of the slope dust 40a to the side frame, the relationship between the brake 44a and the slope dust 40a, and the function of the detector 50m are as described in Section 1. The structure is similar to that of the second fall prevention bags W131a and 32b. The gap between the brake element 44a and the guide rail 5a is S2. The gap S2 is smaller than the gap S1. The lifting drum is stopped by one of the detectors 50, 50a.

Bracket ω fixed with a bolt to the back side of the brake element 44a
The lower end of is a tension spring 61. It is connected to the bracket 8 of the side frame 12g via the bolt 62.

The upper end of the bracket 60 is connected to the fall prevention bag [3] of In2 on the side frame 12b side via the second signal connecting member 33b.
It is connected to the leverization of 1b.

1st. The configuration of the second signal transmission members 33a and 33b will be explained. Since both are substantially the same, the first signal transmission member 33a will be explained.

The signal transmission member 33a includes a rod 6 horizontally attached to the upper frame 13a, and one end of the rod 6 and the side frame 1.
A lobe 6 connects one lever 6 of the first fall prevention device 31a on the side 2a, and a brake 4 of the third fall prevention device 33b at the other end of the rod field and the lower part of the side frame 12b.
It consists of a lobe 67 that connects the bracket ω of 4g.

Rod 6 is attached to the upper frame 13 m with a bracket 70.70
It is mounted so that it can move freely in the horizontal direction.

A lobe 6.6 is provided at the connection between the rod 6 and the lobe 6.67.
A turnbuckle n is provided to eliminate the slack in the part 7.

The lobe nail connected to the bracket ω of the brake element 44a is connected to the rod 6 via a sheave 72.7B provided on the side frame 12b and a sheave 74 provided at the end of the upper frame 13m. Sheaves 72, 73, and 74 are provided to prevent the lobes from coming into contact with the rod shaft.

The lobe 6 is hooked onto a sheave provided at the end of the upper frame 13a above the lever 4.

The operation of such a configuration will be explained.

Now, a case will be described in which the ascending robe 19a breaks while the elevating body 10 is ascending at high speed.

In this case, since the side frame 12b on the side of the lobe 19b that is not cut is rising at high speed, there is a risk that the side frame 12b will stop at the elevated position due to its inertia.

When the hoisting lobe 19a is cut, the force that pulls the bracket 21a upward is lost, so the rod 6 and the bracket 21a are pushed down by the tension spring 47 with respect to the elevating body 4a. Therefore, the brake member is pulled upward and enters a fall prevention operation. For this reason, side frame 1
The 2 m upper part is fixed to the guide frame 5a.

When the brake member moves upward, the detectors detect this movement and the rotation of the lifting drum is immediately stopped. For this reason, the upward lifting of the side frame 12b on the uncut robe 19b side is stopped. However, since it is rising at a high speed, the side frame 12b side tends to rise due to its inertia.

Further, when the brake member moves as described above, the lobe 6 connected to one lever 4 is pulled downward.

This force pulls up the lower brake element 44a on the side frame 12b side via the load θ and the lobe 67. Therefore, the lower part of the side frame 12b also enters the fall prevention operation and is fixed to the guide rail 5b.

Also, by moving the brake element 44a upward, the detector 50
a immediately stops the visiting drum.

In this way, the uncut hoisting lobe 19b side is also fixed to the guide rail 5b by the fourth fall prevention device 33b (brake 44a), so the end of the elevating body 10 on this side rises. There will be fewer things.

Further, if the hoisting lobe 19m is cut, it will tilt and try to stop as shown in FIG. Therefore, the upper part of the side frame 12m on the hoisting lobe 19a side is close to the guide frame 5a, and the side frame 12b on the other end is close to the guide frame 5a.
The lower part of the guide frame 5b is close to the guide frame 5b. At these adjacent portions, there is a first section which is activated when the hoisting rope 19a is cut. Since the fourth fall prevention devices 31a and 31b are provided, the fall prevention bags [31g and 31b can reliably grip the guide frames A5a and 5b.

Next, the gap S2 of the fourth fall prevention device 32b is smaller than the gap S1 of the first fall prevention device 131m. For example, 82 is 1.5-1.8 ms and 81 is 2-3 dragons. Also, the distance l from the lever 6 to the connecting point of the lobe 67 during rotation of the lever! 1 is the connecting point 1 of the wedge from the center of rotation 42
2 (larger in this example). Therefore, the fourth fall prevention bag [32b] operates faster than the first fall prevention device. For this reason, the elevating body 1
0 means that it will stop in a more horizontal state.

Next, if the hoisting rope 19b breaks while ascending at high speed, the second fall prevention bag [31b] at the top of the side frame 12b and the third fall prevention bag [32g is activated.

Next, a case where the hoisting rope 19a breaks while descending at high speed will be described. In this case, the uncut lobe 1
Since the side frame 12b on the 9b side was descending at a high speed, there is a risk that the side frame 12b would stop at the lowered position due to the inertia of the high speed.

When the hoisting rope 19a is cut, the bracket 21a can be lowered relative to the side frame 12a in the same manner as described above, and the brake I is pulled up by the tension spring 47. Similarly, the fourth fall prevention device f32b at the bottom of the side plate 12b is activated. Therefore, the elevating body 10 stops in a substantially horizontal state.

Next, if the hoisting lobe 19b breaks while descending at high speed, the second fall prevention device 1131b at the top of the side frame 12b and the third fall prevention bag [32a at the bottom of the side frame 12a are activated. do.

Note that if the rotation of the lifting drum is abruptly stopped by the emergency stop moving body while the lifting body IO is being raised, the first. Second
．． Third. Fourth fall prevention device 31a, 31b, 32a,
32b will be activated.

As described above, since both ends of the elevating body can be braked, the elevating body can be stopped in a horizontal state. Therefore, it is possible to prevent deformation or damage of the elevating body, deformation of the spacing between the supports, and falling of the cargo.

In the above embodiment, the brake element 44a and the lever bracket are connected, but the brake element 44a and the lever bracket 21 are connected to each other.
m may also be connected.

The signal transmission members 33a and 33b can be installed at the bottom of the base frame 11.

Third. The fourth fall prevention device is provided with only one brake 44a, but the first. Two fall prevention devices can be provided, such as the second fall prevention device. In this case, a member having the same structure as the signal transmission members 33a and 33b is disposed between the added brake and the lever not connected to the rope 31a, and drives the added brake.

In the above embodiment, the tension spring 4 is used as the drive source for the brake element 0.
7 is used, however, the present invention can also be applied to a fall prevention device configured to use a compression spring.

〔Effect of the invention〕

As described above, in the present invention, two fall prevention devices are provided on the left and right sides of the elevating body, and when one fall prevention device Ml at one end of the elevating body is activated, one fall prevention device at the other end is activated. Therefore, even if the hoisting lobe at only one end of the elevating body breaks while ascending and descending at high speed, the elevating body can be stopped in a substantially horizontal state. Therefore, it is possible to prevent deformation or damage to the elevating body or the spacing between columns, and to prevent the cargo from falling.

[Brief explanation of the drawing]

Fig. fs1 is a front view of an elevating body according to an embodiment of the present invention, Fig. 2 is a left side view of Fig. 1, Fig. 3 is a right side view of Fig. 1, and 9J
Figure 4 is a plan view of Figure 1, Figure 5 is a cross-sectional view taken along line A-A in Figure 2, Figure 6 is a cross-sectional view taken along line B-B in Figure 2, and Figure 7 is a cross-sectional view taken along line C in Figure 2.
-C parent diagram, FIG. 8 is a diagram illustrating the state of the elevating body when the left hoisting lobe is cut off during the ascent. 5g, 5b...Guide rail, 10. Hitting/elevating body, 11...Base frame, 12a, 12b
・・・・・・One side flap, 13a, 13b
--- Upper frame, 19a, 19b...Hoisting lobe, 21m, 21b...Bracket,
23 m, 23 b---...opening, 31 g
, 31 b, 32 a, 32 b...
Fall prevention device, 33a, 33b... Signal transmission member, Xun. 40m...Slope seat, 44,44a...
Risted brake, Tsuge...Rod, 47...
...Tension spring, sO, 50m ...Emergency detector, group ...Rod, part, 67...Lobe, I ■Figures /3a, /3b --- J-yL-1-45---*y
Do, 31a, 32a---drop 7F*fili-31b,
32b-Drinking I 汀辷汐t &, 6 hoo loaf. 4 figure 13σ, 13b-m-upper frame 1'/a, /Qb ---AhtI■a-70 5th eye 3b ♀ 1570'l16'lbF 5a-1-gal 1rb-ru to---4r exclusive 4 pieces/9a --1st term lower 121 (1--
-1't'Fyto
3102 Naguchi 44 31a, 32a -- Kotobuki Shinki IE 33b ---4tJ'i4Km River
73αi---Bite・Do
ゎ6 Whooo Roar 72.7J-74-m-Sheave 26#2 zu2σ 1θ// 5a 7o 6 Kuruhatsu-11 @ life seat off diagram o δ diagram

Claims (1)

[Claims] 1. An elevating body that ascends and descends along the left and right guide rails of the stacker crane, a hoisting rope suspended along the vicinity of each guide rail, and at the left and right ends of the elevating body, respectively. A connecting member that is provided to be freely lowerable relative to the elevating object and connects the end of the elevating object and the hoisting rope, and a connecting member that moves upward between the left and right ends of the elevating object and each guide rail. A first brake that is freely installed on the elevating body and connected to the connecting portion; a spring provided on the elevating body so as to pull each brake element upward; each left and right end of the elevating body and each guide rail. a second brake that is movably mounted on the elevating body between the two; a connecting part at the left end of the elevating body; a second brake at the right end of the elevating body; and a connection between the right end of the elevating body; and a signal transmission member that connects the part and the second brake at the left end of the lifting body, and moves the second brake upward by moving the connecting part downward. Body fall protection device.