JPH08324714A - Bound suppressing device for elevating platform - Google Patents

Abstract

PURPOSE: To suppress bounding generated at the time of stopping an elevating platform with a simple structure by mounting a brake device equipped with a brake shoe formed on the elevating base so as to engage and disengage with/ from a mast. CONSTITUTION: A brake device 50 equipped with a brake shoe 54 formed so as to engage and disengage with/ from a mast 15 is fitted on the right and left of an elevating platform 16. On a bracket 51 fitted onto the elevating base 16 through a fitting arm 49, of the brake device 50, an oscillating arm 53 is formed so as to oscillate fore and aft with a pivoted shaft 52 whose axial center is directed in the right/left direction. The brake shoe 54 is attached to the oscillating arm 53 in such a form as to face the mast 15 so that its position may be changed freely from the pivoted shaft 52 which is a pivoting point. By adjusting the position of the brake shoe 54, it is possible to adjust the contact force of the brake shoe 54 with the mast 15 easily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lift restraint device for a lifter of a stacker crane of an automatic warehouse.

[0002]

2. Description of the Related Art The following are known as conventional automatic warehouses. That is, a pair of front and rear rack devices having a large number of article storage shelves vertically and horizontally provided at predetermined intervals in the front and rear direction, and a stacker crane movably provided between the front and rear rack devices. And a stacker crane, the traveling carriage, an elevator that can be raised and lowered along a mast provided on the traveling carriage, and a hanging rope that suspends the elevator,
A device having an article transfer device (for example, a slide fork provided slidably in the front-rear direction) provided on the elevating table is known. As the above-mentioned suspension rope, for example, one end is attached to a lift and is hung on an upper wheel, and the other end is connected to a counterweight, and an upper wheel or another drive wheel on which the suspension rope is hung. Rotating the elevator to move the elevator up and down, or one that is hung on the upper and lower wheels and is endless including the elevator, and one of the upper and lower wheels or a hanging rope is hung on There is known a device that rotates a drive wheel to move an elevating table up and down.

[0003]

Disadvantages of the Prior Art The above-described conventional lifting device for a lift has the following drawbacks. That is, since the lifting platform is hung by elastic stretchable ropes, when the lifting platform stops, vertical vibrations (bounds) are generated on the lifting platform due to inertia of the lifting platform, etc. After stopping, the articles are transferred between the elevator and the article storage rack. However, the time to wait for the vertical vibrations of the elevator to stop has become a major obstacle to high-speed operation / reduction of operating time in recent years.

[0004]

[Means for Solving the Disadvantages] The present invention employs the following means in order to eliminate the above disadvantages. The present invention
A lifting device for a lift having a mast, a lift that can be raised and lowered along the mast, and a lifting rope that suspends the lift, and the lift can be contacted with and separated from the mast. A brake device having a brake shoe is provided.

[0005]

The present invention has the following functions. With a simple structure, it is possible to suppress bouncing when the elevator is stopped.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments with reference to the drawings. In this embodiment, the front means the lower side of FIG. 1, the rear means the upper side of FIG. 1, and the left means the left side of FIG.
Right means the right side of the figure.

A pair of front and rear rack devices 1 are erected on the floor so as to open the stacker crane passage 10. The rack device 1 includes a large number of front columns 2 arranged at right and left at predetermined intervals, rear columns 2 arranged at predetermined intervals behind the front columns 2 and front and rear columns 2. And a plurality of article support members 4 provided at predetermined intervals in the height direction, and the article storage shelves 3 are formed by a pair of left and right article support members 4 that face each other without the support columns 2.
Is configured. A fork passage gap 5 is provided between the pair of left and right article support members 4 to allow a slide fork 17 to be described later to move in the vertical direction. The access ports 6 of the article storage shelves 3 of the front and rear rack devices 1 face each other.

On the left side of the rack device 1, there is provided a loading / unloading roller conveyor 8 whose carrying direction is left and right. The rack device 1 for the loading / unloading roller conveyor 8
A known article elevator (not shown) is provided on the side.
This article elevator includes a lift table that can be raised and lowered by a known lift device below the rollers of the loading / unloading roller conveyor 8,
The elevator table is provided upright and has a pair of bearing frames located between the rollers of the loading / unloading roller conveyor 8. The article elevator lifts the article W by the support frame to form a fork insertion gap between the transport surface of the loading / unloading roller conveyor 8 and the lower surface of the article W, or the slide fork 1 by the support frame at the raised position.
The article W is received from the article 7 and then descends to have the function of lowering the article W on the loading / unloading roller conveyor 8.

A pair of upper and lower guide rails 11 are arranged in the stacker crane passage 10 so that the longitudinal direction thereof is oriented in the left-right direction, and the stacker crane 13 is guided by these guide rails 11 so as to be movable left and right. , This stacker crane 13 has a traveling carriage 14
And an elevating table 16 which can be moved up and down along a pair of masts 15 provided on the traveling carriage 14 by an elevating device 21 which will be described in detail below, and a horizontal movement in the front-rear direction by a well-known advancing / retreating mechanism for the elevating table 16. It has a slide fork 17 slidably provided. As is well known, the slide fork 17 pulls the article W into the elevating table 16 by performing an operation of projecting the article W downward, lifting the article W by raising the elevating table 16 and retreating to the elevating table 16 side. The article W can be unloaded onto the article storage shelf 3 or the like by the reverse operation.

The elevating device 21 has a counterweight 24 that is vertically movable in the hollow left mast 15 and a counterweight 25 that is vertically movable in the hollow left mast 15. ing.

A pair of wheels 31 are rotatably provided on the upper part of the stacker crane 13 so as to be positioned above the left side portion of the elevating table 16 and have their axes centered in the front-rear direction. A pair of wheels 32 are rotatably provided on the upper right side of the stacker crane 13 so as to be opposed to 31, with their axes oriented in the front-rear direction. A pair of wheels 33 are rotatably provided on the upper portion of the stacker crane 13 so that the axes thereof are oriented in the front-rear direction, and are arranged at the same height as the wheels 33, but are displaced rearward so that the stacker crane 13 On the upper left side, a pair of wheels 34 are rotatably provided with their axes oriented in the front-rear direction.

A pair of front and rear brackets 42 are provided on the right side of the lower portion of the stacker crane 13 (traveling carriage 14), and a drive drum 43 having a spiral groove 44 in these brackets 42 is arranged so that its axial center is oriented in the front-rear direction. The drive drum 43 is rotatably provided, and is rotated by a motor 45 which is rotatable in forward and reverse directions.

One end of two suspension ropes 22A and 22B made of wire rope or the like is fixed to the left side of the lift 16 and after these suspension ropes 22A and 22B are hung on the wheel 31 and the wheel 32, Spiral groove 4 of drive drum 43
4 is wound around at least once and a half times, and then is hung on the wheels 33 and 34 and fixed to the left counterweight 24. The suspension rope 22A and the suspension rope 22B are wound so as to be adjacent to each other in the spiral groove 44 without interfering with each other.

A pair of wheels 36 are rotatably provided on the upper part of the stacker crane 13 so as to be positioned above the right side of the elevating table 16 and have their axes centered in the front-rear direction. A pair of wheels 37 are rotatably provided on the upper right side of the stacker crane 13 so as to face 36, with their axes oriented in the front-rear direction. A pair of wheels 38 are rotatably provided on the upper part of the stacker crane 13 with their axes oriented in the front-rear direction, and on the upper part of the stacker crane 13 so as to face these wheels 38.
A pair of wheels 39 are rotatably provided with their axes oriented in the front-rear direction. The wheel 32 and the wheel 37 are concentrically arranged side by side in the front-rear direction.
The wheel 33 and the wheel 38 are concentrically arranged side by side in the front-rear direction.

One end of two suspension ropes 22C and 22D made of a wire rope or the like is fixed to the right side of the lift 16 and after these suspension ropes 22C and 22D are hung on a wheel 36 and a wheel 37, Spiral groove 4 of drive drum 43
4 is wound around at least once and a half times, and then is hung on the wheels 38 and 39 and fixed to the counterweight 25 on the right side. The suspension rope 22C and the suspension rope 22D are wound so as to be adjacent to each other in the spiral groove 44 without interfering with each other. That is, the hanging rope 22A-
The suspension ropes 22D are arranged in the front-rear direction without interfering with the spiral groove 44.

With the above-described structure, the lift table 16 can be moved up and down by operating the motor 45 and rotating the drive drum 43, while the motor 45 is stopped and the brake built in the motor 45 (shown in the figure). The lift table 16 can be stopped at a predetermined position by operating (omitted). The portions of the hanging ropes 22A to 22D wound around the spiral groove 44 move back and forth along the spiral groove 44, so that the lifting table 16 can be held at the lowest position or the highest position. Line 22A to hanging line 22D
It goes without saying that the front-rear length of the drive drum 43 (the total number of spirals in the spiral groove 44) is set so that the portion wound around the spiral groove 44 does not come off from the spiral groove 44.

A brake device 50 having brake shoes 54 that can be brought into and out of contact with the mast 15 is provided on the left and right portions of the lift table 16. A swing arm 53 is provided on a bracket 51 of the brake device 50, which is attached to the elevating table 16 via an attachment arm 49, so that a swing arm 53 is swingable back and forth by a pivot 52 having its axis oriented in the left-right direction. A brake shoe 54 is provided on the arm 53 so as to face the mast 15 so that the position of the brake shoe 54 can be changed from the pivot shaft 52, which is a pivot point, as described in detail below. That is, the swing arm 53 has a plurality of screw holes 55.
Is formed, and the screw hole 55 corresponding to the mounting position of the brake shoe 54 is aligned with the through hole 56 having the bolt head relief formed in the brake shoe 54, and then the bolt 57 is screwed through the through hole 56. The brake shoe 54 is attached to the swing arm 53 at a desired position by screwing the brake shoe 54.

A tension spring 61 for urging the swing arm 53 in a direction in which the brake shoe 54 moves away from the mast 15 is provided between the free end of the swing arm 53 and the bracket 51. Further, an actuated projection 62 is provided at the free end of the swing arm 53, and the rod 65 faces the actuated projection 62 to allow the linear solenoid 6 to move.
4 is attached to the bracket 51. With such a configuration, when the lift table 16 is stopped, the rod 6
By projecting 5 toward the actuated projection 62, the brake shoe 54 can be pressed against the mast 15. As described above, the position of the brake shoe 54 is freely changeable from the pivot shaft 52. Therefore, by adjusting the position of the brake shoe 54, the brake force can be easily adjusted without adjusting the operating force of the linear solenoid 64. The contact force of the shoe 54 with the mast 15 can be adjusted. When the brake shoe 54 is in contact with the mast 15, it is possible to overcome the contact force and move the lift table 16 up and down. That is, the brake shoe 54 does not determine the stop position of the lift table 16 and has an action of suppressing vertical vibration (bound) when the lift table 16 is stopped. The amount of withdrawal of the linear solenoid 64 is adjusted by a stopper 67 provided on the bracket 51 so that the contacted piece 66 attached to the rod 65 is positionally adjustable.

[0019]

[Modifications, etc.] Modifications will be described below. (1) The drive drum 43 may be replaced with a simple drive wheel. (2) A guide rail is provided on the swing arm 53, and the position of the brake shoe 54 can be freely changed from the pivot shaft 52 along the guide rail.
Alternatively, the brake shoe 54 may be fixed by pressing a bolt screwed to the swing arm 4 onto the swing arm 53. (3) At least one brake device 50 may be provided. (4) A pair of front and rear brake devices 50 may be provided on the left and right parts of the lift 16 so as to sandwich the mast 15.

[0020]

The present invention has the following effects due to the above-described structure. According to the first aspect of the present invention, it is possible to suppress the bouncing when the elevator is stopped with a simple structure. According to the invention of claim 2, since the brake device does not regulate the position of the lifting table, the stopping position of the lifting table is not displaced by the braking device. According to the invention of claim 3, by adjusting the position of the brake shoe with respect to the swing arm, the brake shoe can be easily attached to the mast without adjusting the operating force or the like of the actuator of the swing arm. The contact force can be adjusted.

[Brief description of drawings]

FIG. 1 is a simplified horizontal sectional view with an intermediate omitted, showing an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view along the line II-II of FIG.

FIG. 3 is an enlarged sectional view taken along line III-III of FIG.

FIG. 4 is an enlarged sectional view taken along line IV-IV of FIG. 2;

FIG. 5 is an enlarged sectional view taken along line VV of FIG. 2;

FIG. 6 is a sectional view taken along line VI-VI of FIG. 5;

[Explanation of symbols]

 15 mast 16 lifting platform 22A hanging rope 22B hanging rope 22C hanging rope 22D hanging rope 50 Brake device 54 Brake shoe

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[Procedure amendment]

[Submission date] July 12, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

[0010] The lifting device 21 is closed the hollow left counterweight 24 and hollow right side counterweight 25 provided vertically movably to the mast 15 of which is provided vertically movably to the mast 15 are doing.

Claims (3)

[Claims] 1. An elevating device for an elevating table having a mast, an elevating table that can be moved up and down along the mast, and a lifting rope for suspending the elevating table, and the elevating table is in contact with the mast.・ A bounce restraint device for an elevator that is provided with a brake device having a brake shoe that can be separated. 2. The bounce restraint device for an elevator according to claim 1, wherein the elevator can be raised and lowered while the brake shoe is in contact with the mast. 3. The brake device includes a swing arm that is swingably provided on a lift table, and a brake shoe that is provided on the swing arm so that the position of the swing arm can be changed from its pivot point. The bounce restraint device for an elevator according to claim 1 or 2.