JP5057716B2 - End-of-orbit buffer structure - Google Patents

Description

  The present invention relates to a track end buffer structure that prevents a truck such as a stacker crane installed in an automatic warehouse from running off a track.

  The following patent document discloses a technique for attaching a shock absorber near the end of a rail for guiding a stacker crane. When the stacker crane cannot stop normally at the end of the rail and is about to run away from the rail, the shock absorber absorbs the impact of the stacker crane hitting the stopper of the rail.

JP 2002-265015 A

  However, automatic warehouses are often installed on a small site, and it is difficult to secure a space where shock absorbers can be placed.

  In addition, when mounting a shock absorber in an automated warehouse installed with a pair of racks on both sides of the area where the stacker crane travels, if the shock absorber is fixed to the beam connecting the upper ends of the racks, the reaction force of the shock The beam will accept to some extent. For this reason, measures such as strengthening beams are indispensable.

  In addition, the trouble that the stacker crane runs away does not occur frequently, and for that reason, if the automated warehouse is equipped with an expensive shock absorber and the beams are strengthened, the production cost of the automated warehouse will rise unnecessarily. There's a problem.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a track end buffering structure that has an excellent buffering effect and does not involve a large design change of an automatic warehouse at a low cost.

The track end buffer structure according to the present invention is a track end buffer structure for preventing a stacker crane traveling along a rail between racks facing each other from running away from the rail, the rack facing the rack. A plurality of beams spanned between the upper ends of the two, two bars intersecting with the plurality of beams in plan view and extending in a direction in which the stacker crane travels, and each of the two bars A horizontal member that connects one end of the stacker crane on the traveling end side to each other, and is fixed to the two rods via the horizontal member, and is positioned at the traveling end of the stacker crane so that the stacker crane abuts. An end stopper and a plurality of friction joints, wherein the friction joints are pressed against the rods by a friction material fixed via the beams, so that the rods are rubbed against the beams. Power The stacker crane is slidable in the traveling direction of the stacker crane, and the friction joints are arranged on both sides of the rail of the stacker crane in a plan view, and the stacker crane travels on both sides of the stacker crane. A plurality of the sensors are arranged at positions separated in the direction.

The track end buffer structure according to the present invention fixes an end stopper to a rod body extending in the traveling direction of a stacker crane, and fixes each to a rack facing each other via a plurality of beams or the like spanned between them. The friction material is pressed against the rod body, so that if the stacker crane is about to go out of range and hits the end stopper, it will slip moderately between the rod body and the friction material. And the stacker crane can be braked while effectively absorbing the kinetic energy of the stacker crane.

  In addition, according to the buffer structure, since the reaction force due to braking of the stacker crane is distributed from the plurality of friction materials to the plurality of beams and the like, there is an advantage that it is not necessary to reinforce the individual beams and the like. Further, since the rod body and the friction material are accommodated between the racks, it is not necessary to separately provide a space for arranging the rod body and the friction material.

  FIG. 1 shows a plan view of a track end buffer structure 4 for preventing a stacker crane 3 traveling along a rail 2 between racks 1 facing each other from running away from the rail 2. The shock absorbing structure 4 at the end of the raceway includes two bar bodies 5 extending in the direction of arrow X along which the stacker crane 3 travels, a horizontal member 6 that connects between one end of each of the two bar bodies 5, An end stopper 7 fixed to the two rods 5 via the frame 6 and a plurality of friction joints 9 separated from each other in the direction in which the stacker crane 3 travels are provided.

  FIG. 2 illustrates the arrangement of the rod body 5 and the horizontal member 6. FIG. 3 is a perspective view of the friction joint 9 that is not shown in FIG. 2. As shown in FIGS. 1 and 2, between the two racks 1, a plurality of small beams 10 linking these upper ends are bridged. The rod body 5 is mainly made of lightweight lip channel steel, and a latch member 11 is fixed to the other end. The end stopper 7 is a member that regulates the limit of the travel distance of the stacker crane 3 by directly hitting the vicinity of the upper end of the mast of the stacker crane 3.

  Next, the friction joint 9 will be described. As shown in FIGS. 3 and 4, the upper friction material 90 is sandwiched between the upper surface of the rod 5 and the lower surface of the beam 10, and the lower friction material 90 is in contact with the lower surface of the rod 5. Yes. These are sandwiched between the push plates 91 and 92 from above and below, and the nuts 13 are screwed onto the two friction members 90 and a plurality of bolts 12 passing through the push plates 91 and 92, respectively. In this state, if the bolt 12 and the nut 13 are loosened, the rod 5 can be freely slid with respect to the small beam 10 in the arrow X direction or in the opposite direction.

  After positioning the two rod bodies 5 so that the end stopper 7 is in an appropriate position with respect to the rail 2 shown in FIG. 1, the bolt 12 and the nut 13 are tightened. As a result, the upper friction material 90 is strongly sandwiched between the rod 5 and the small beam 10, and at the same time, the lower friction material 90 is pressed against the lower surface of the rod 5. Further, by adjusting the tightening force of the bolt 12 and the nut 13, the friction force between the rod body 5 and the upper friction material 90 and the friction force between the rod body 5 and the lower friction material 90 are reduced. Can be adjusted. Each friction material 90 is mainly a stainless steel plate. Stainless steel has a coefficient of friction that is more stable than that of iron or the like, so that a desired frictional force can be obtained.

  For example, the control apparatus which controls driving | running | working of the stacker crane 3 gives the example which cannot stop the stacker crane 3 by detecting the position of the stacker crane 3 approaching the edge part of the rail 2 accidentally. In this case, when the stacker crane 3 that is likely to run away from the rail 2 hits the end stopper 7, it is moderate between the rod 5 and the upper friction material 90 and between the rod 5 and the lower friction material 90. Therefore, the kinetic energy of the stacker crane 3 can be effectively absorbed. In this process, the stacker crane 3 is suddenly braked and stops immediately before dropping from the end of the rail 2.

  Moreover, since the reaction force due to sudden braking of the stacker crane 3 is distributed from the respective friction members 90 of the plurality of friction joints 9 to the plurality of small beams 10, it is not necessary to reinforce the individual small beams 10 or There is an advantage that it is not necessary to replace the beam with a stronger beam. Further, since the rod body 5 and the friction joint portion 9 are stored between the racks 1 or in a slight gap such as the rack 1 and the ceiling, a space for arranging the rod body 5 and the friction joint portion 9 is separately provided. There is no need to provide it.

Incidentally, FIG. 2 is omitted the other illustrates the one end of the rail 2, the buffer structure of the track ends of the present invention is intended to be applied to the other end of the rail 2.

The top view which shows the example of installation of the buffer structure of the track end which concerns on embodiment of this invention. The disassembled perspective view which shows arrangement | positioning of the principal part of the buffer structure of the track end which concerns on embodiment of this invention. The disassembled perspective view of the friction junction part of the buffer structure of the track | orbit end which concerns on embodiment of this invention. The YY sectional view taken on the line of FIG.

1: Rack 2: Rail 3: Stacker crane 4: Track end cushioning structure 5: Rod 7: End stopper 90: Friction material

Claims (1)

A stacker crane that travels along a rail between racks facing each other is a buffer structure at the end of the track that prevents escape from the rail,
A plurality of beams spanned between the upper ends of the facing racks;
Two rods that intersect the plurality of beams in plan view and extend in the direction in which the stacker crane travels;
A horizontal member for connecting the ends of the two sticks on the traveling end side of the stacker crane;
An end stopper which is fixed to the two rods via the horizontal member and is positioned at the traveling end of the stacker crane so that the stacker crane abuts;
A plurality of friction joints;
With
When the friction material fixed via the beam is pressed against the rod body, the friction joint portion is configured to be slidable in the traveling direction of the stacker crane while obtaining frictional force against the beam. Have been
The friction joints are arranged on both sides of the rails of the stacker crane in a plan view, and a plurality of the friction joints are arranged at positions separated in the traveling direction of the stacker crane on both sides. Buffer structure at the end of the track.

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