JP5254158B2 - Warehouse opening structure - Google Patents

Description

  The present invention relates to a carry-in opening structure of a warehouse.

  Conventionally, a fall prevention tool for preventing a human fall accident has been fixedly installed in an opening of a veranda or the like provided on the second floor or more of a building (for example, see Patent Document 1).

JP 2000-120159 A

However, when carrying and lifting a load by a forklift from the ground floor to the loading opening to the loading opening on the second floor or more of the warehouse where the loading and unloading of goods is frequently performed, a fall prevention tool is provided on the floor of the loading opening. When it was erected, it was impossible to place luggage on the floor of the carry-in opening, and a great deal of labor was spent on delivery of the luggage.
Further, it is very troublesome to attach and detach the fall prevention tool at the carry-in opening portion every time the load is carried in and out, which causes a reduction in work efficiency.

  Then, an object of this invention is to provide the carrying-in opening part structure of the warehouse provided with the human fall prevention safety device.

Therefore, the carrying-in opening structure according to the present invention is provided with a fall prevention safety device at a carry-in port on the second floor or more for loading / unloading goods into / from a warehouse, and the fall prevention safety device is provided on the left and right edges of the carry-in port. A mounting member that is supported so as to be movable up and down along a vertical guide member disposed in the section, and two safety bars that are horizontally mounted between the mounting members and disposed at predetermined intervals above and below, The fall prevention safety device further includes a driving device including an electric motor, and is connected to a lot rod that is driven to rotate around a horizontal axis by the driving device, and is connected to the left and right end portions of the lot rod and vertically. A power transmission mechanism having a pair of left and right screw shafts rotating about an axis; the screw shaft is screwed onto a nut member attached to the mounting member; and the power of the driving device is transmitted through the power transmission mechanism. To the mounting member To the two said safety bar configured to raise and lower, the lower end of the vertical guide member, than the floor forming the entrance is disposed at a lower position, the two said safety bar, the safe working conditions to prevent the load transportation state to fully open the drop above entrance at a position lower than the floor, elevated falling worker by blocking the entrance to a height position which inhibits the passage of worker between, be movable, in the safety operating state, the power transmission mechanism, the external force acting on the lifting direction of the safety bar, which is constituted so as not to transmit to the drive device.

Also, it said safety bar is for the worker consists graspable pipe material.

Also, by suspending the wire fixed pulley provided on the upper portion of the vertical guide member, one end of the wire, in tandem to the mounting member, and the other end of the wire, obtained by attaching the balance weight It is .

  Further, the drive device is controlled by a wireless controller on the side of the carrying-in vehicle.

  According to the carry-in opening structure of the present invention, it is possible to reduce the risk of a fall accident of a worker who performs delivery work at a high place and to ensure safety. In addition, when loading the luggage, the safety bar is lowered, and the luggage can be conveyed by a conveyance vehicle such as a forklift, so that the work efficiency is remarkably improved.

It is the perspective view which showed one Embodiment of this invention. It is the top view which showed the delivery port of the warehouse. It is the principal part enlarged front view which showed the delivery port of the warehouse. It is the principal part enlarged plan view which showed the entrance of the warehouse. It is the principal part enlarged side view which showed the delivery port of the warehouse. It is the enlarged front view which showed an example of the attachment member. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is the plane sectional view showing a helical gearbox. It is side surface sectional drawing which showed the worm gear box.

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments.
As shown in FIG. 1 and FIG. 2, the present invention is used for ascending and transporting a load B carried by a loading vehicle F such as a forklift from the ground floor to enter the warehouse S, or in the warehouse S. A drop prevention safety device 1 for ensuring the safety of the worker A is installed at the carry-in entrance 10 provided on the second floor or higher of the warehouse S in order to drop the cargo B to the ground floor for delivery.
The fall-preventing safety device 1 includes a horizontal safety bar 2 that can be horizontally moved up and down along vertical guide members 3 and 3 disposed at the left and right edges of the carry-in entrance 10. At the time of non-carrying in such as waiting for conveyance, the safety bar 2 is in a safe operating state that prevents the worker A from falling.

3 to 5 show the carry-in port 10 in which the fall prevention safety device 1 is installed.
The two safety bars 2, 2 are made of a pipe material that can be gripped by the worker A, and are arranged at predetermined intervals in the vertical direction, and the left and right end portions 2a, 2b of the safety bars 2, 2 are attached to the attachment members 31, 31. Are connected together. The safety bars 2 and 2 are connected by vertical reinforcing members 22, 22 and 22. In addition, the height dimension H from the floor 13 of the safety bar 2 in the safe operation state is set to 1100 mm or more.
The vertical guide members 3 and 3 are attached to the recessed portions 11a and 12a formed by extending the left and right edge portions 11 and 12 of the carry-in entrance 10 so that the guide grooves 30 and 30 opened in the longitudinal direction are opposed to each other. Are vertically suspended in pairs. Lower end portions 3 a and 3 a of the vertical guide members 3 and 3 are disposed below the floor 13 of the carry-in entrance 10. The vertical guide members 3 and 3 are attached to the outside of the warehouse S so as to be exposed along the outer ends of the left and right edge portions 11 and 12 of the carry-in entrance 10. Then, the safety bars 2 and 2 are lowered to a position lower than the floor 13 (shown by a two-dot chain line in the figure) so as to be in a load carrying state. In the luggage transport state, the safety bars 2 and 2 are arranged so as not to block the carry-in entrance 10 and prevent the transportation of the luggage B.

  Further, a fixed pulley 32 is fixed to the upper portions 3b, 3b of the vertical guide members 3, 3, and one end 33a of a wire 33 suspended from the fixed pulley 32 is connected to the mounting member 31, and the wire A balance weight 34 is attached to the other end 33 b of 33.

The fall prevention safety device 1 has a drive device 4 composed of an electric motor and a power transmission mechanism 5 that transmits the power of the drive device 4 to the safety bar 2.
Drive device 4 is arranged to rotate the drive shaft of the electric motor to the first horizontal axis X ₁ around.
The power transmission mechanism 5 includes a rotatable lots rod 40 to the second horizontal axis X ₂ around orthogonal to the first horizontal axis X _1, vertical guide members of the left as rotatable first vertical axis Y ₁ around a screw shaft 41 screwed to a mounting member 31 which is disposed in 3, is screwed to a mounting member 31 which is disposed on the right side of the longitudinal guide member 3 as a rotatable second vertical axis Y ₂ around And a screw shaft 42.

Furthermore, as shown in FIGS. 9 and 10, the drive shaft of the electric motor and the intermediate portion of the lot rod 40 are connected by a worm gear box 43 formed by meshing a worm gear and a worm wheel inside the housing, and The left and right end portions of the lot rod 40 and the lower end portions of the left and right screw shafts 41 and 42 are connected by helical gear boxes 44 and 44 formed by meshing helical gears inside the housing.
The power transmission mechanism 5 transmits the motive power of the driving device 4 to the lot rod 40 via the worm gear box 43 and rotates it, and further, from the lot rod 40 to the screw shafts 41 and 42 via the helical gear boxes 44 and 44. The mounting members 31, 31 are moved up and down by being transmitted and rotated.

The worm gear box 43 is configured to rotate the lot rod 40 by applying a rotational force from the drive device 4, but conversely, even if a rotational force is applied to the lot rod 40, the drive device 4. Do not transmit rotational force to
Moreover, even if the external force of the raising / lowering direction acts on the safety bars 2 and 2, the screw shafts 41 and 42 are configured not to rotate.
In other words, the power transmission mechanism 5 transmits the power of the drive device 4 to the mounting members 31 and 31 to raise and lower the safety bars 2 and 2, but the drive device 4 applies an external force acting on the safety bars 2 and 2 in the lifting direction. It is configured not to be transmitted to.

  The fall prevention safety device 1 is provided with an operation unit 20 for controlling the operation of the drive device 4 (see FIG. 4 or FIG. 5). The carry-in vehicle F is equipped with a wireless controller 21 that can control the operation of the drive device 4 (see FIG. 1 or FIG. 2). The operation unit 20 and the wireless controller 21 are controllers having two types of operation buttons for controlling the raising and lowering of the safety bar 2.

6 to 8 are enlarged views showing the attachment member 31.
The mounting member 31 has a nut member 35 screwed to the screw shafts 41 and 42 attached to the lower end edge portion, and the screw shafts 41 and 42 are inserted into the nut member 35 so that the vertical guide member 3 can be moved up and down. ing. The attachment member 31 projects the connecting portion 36 from the guide groove 30 of the vertical guide member 3. Short cylindrical members 37, 37 that can be fitted into the left and right end portions 2a, 2b of the safety bars 2, 2 are fixed to the connecting portion 36. The short cylinder members 37 and 37 are secured to the safety bars 2 and 2 by screws.
Further, the attachment member 31 has rollers 38, 38 that can roll on the guide surface 45 in the vertical guide member 3, and spheres 39, 39 that can roll on the inner wall surface 46 of the vertical guide member 3. doing.

The use method (action) of the carry-in opening structure of the warehouse of the present invention described above will be described.
As shown in FIG. 3, when the fall prevention safety device 1 is in a safe operating state, the carry-in entrance 10 is blocked by the raised safety bars 2, 2, thereby obstructing the passage of the worker A. Therefore, the worker A does not fall down accidentally. The safety bars 2 and 2 can be gripped as handrails and ensure the safety of the worker A who performs work near the dangerous entrance 10. The safety bars 2 and 2 that are integrally connected by the mounting members 31 and 31 and are horizontally mounted on the vertical guide members 3 and 3 reliably support the worker A without being lowered even if the load of the worker A is received. To do.

  Then, in order to load the cargo B transported by the carry-in vehicle F into the warehouse S from the carry-in entrance 10, the driving device 4 is operated by the wireless operation device 21 of the carry-in vehicle F, and the safety bars 2, 2 are moved. Lower. At this time, the power of the drive device 4 is transmitted by the power transmission mechanism 5 to lower the mounting members 31, 31, so that the safety bars 2, 2 in the safe operating state are located below the floor 13 of the carry-in entrance 10. Lower. In this way, the fall-prevention safety device 1 is brought into the baggage transport state, and the carry-in entrance 10 is fully opened.

  The carry-in vehicle F raises the load B to a height at which the load B can be loaded into the carry-in entrance 10, then places the load B on the floor 13 and moves backward. At this time, since the safety bars 2 and 2 are lowered below the floor 13, the loading operation of the loading vehicle F is not hindered. Thereafter, the safety bar 2 is operated by the wireless controller 21 so as to be raised again, and the fall prevention safety device 1 is returned to the safe operating state. Since the attachment members 31 and 31 are connected to the balance weight 34 via the wire 33, the tension acts in the upward direction, and the drive force of the drive device 4 related to the upward movement of the safety bars 2 and 2 is minimal. Just do it. Further, the mounting members 31, 31 are guided in the ascending / descending direction by rolling the rollers 38, 38 and the spheres 39, 39 to the guide surface 45 and the inner wall surface 46 in the longitudinal guide members 3, 3, so The load other than is moved up and down while being carried by the longitudinal guide members 3 and 3.

  The fall prevention safety device 1 can be controlled by the radio operating device 21 on the carry-in vehicle F side and the operation unit 20 attached on the carry-in entrance 10 side. When the worker A performs work near the carry-in entrance 10, Always be in safe operating condition.

  The design of the present invention can be changed. For example, the power transmission mechanism 5 can freely change its configuration as long as it transmits the power of the drive device 4 and moves the safety bar 2 up and down. .

  As described above, according to the present invention, the fall prevention safety device 1 is installed at the carry-in port 10 on the second floor or higher for loading and unloading the luggage B in the warehouse S. The fall prevention safety device 1 is provided on the left and right edges of the carry-in port 10. It has a horizontal safety bar 2 that can be moved up and down along the vertical guide members 3 and 3 arranged in the sections 11 and 12, and the safety bar 2 prevents the worker A from falling when the cargo B is not carried in. Therefore, it is possible to ensure safety by blocking the carry-in entrance 10 with the safety bar 2 and preventing the worker A and other persons from falling from the carry-in entrance 10. In addition, when the load B is carried in, the safety bar 2 is lowered so that the work efficiency is remarkably improved without disturbing the transfer of the load B by the loading vehicle F.

  Moreover, since the fall prevention safety device 1 has the drive device 4 composed of an electric motor and the power transmission mechanism 5 that transmits the power of the drive device 4 to the safety bar 2, the safety bar 2 can be raised or lowered quickly. It can be quickly lowered as the incoming vehicle F approaches, and conversely, it can be raised immediately when the incoming vehicle F leaves.

  Further, since the safety bar 2 is made of a pipe material that can be gripped by the worker A, the safety bar 2 can be gripped as a handrail, and the safety of the worker A and the like can be ensured.

  In addition, two safety bars 2 and 2 are arranged at predetermined intervals in the vertical direction, and left and right end portions 2a and 2b of the safety bars 2 and 2 are integrally connected by attachment members 31 and 31, and the attachment members 31 and 31 are connected. Since it raises / lowers via the power transmission mechanism 5, it becomes possible to raise / lower the safety bars 2 and 2 smoothly, and rigidity is increased and it is safe, and also accurate positioning can be performed.

  Further, the lower end portions 3a and 3a of the vertical guide members 3 and 3 are disposed below the floor 13 forming the carry-in entrance 10, and the safety bars 2 and 2 are lowered to a position lower than the floor 13 to load the luggage. Since it is configured to be in the transport state, the carry-in entrance 10 can be fully opened, the work of carrying in / out the cargo B is not hindered, and work efficiency is improved.

  The wire 33 is suspended from the fixed pulley 32 provided on the upper portions 3 b and 3 b of the vertical guide members 3 and 3, one end 33 a of the wire 33 is connected to the mounting member 31, and the other end 33 b of the wire 33 is connected to the other end 33 b. Since the balance weight 34 is attached, the work amount of the drive device 4 related to the raising of the safety bar 2 can be minimized.

  Further, since the power transmission mechanism 5 is configured not to transmit the external force acting in the raising / lowering direction of the safety bar 2 to the driving device 4, even if the safety bar 2 receives the load of the worker A in the raising / lowering direction, it is unexpected. The worker A can be reliably supported without descending.

  In addition, since the driving device 4 is controlled by the wireless controller 21 on the incoming vehicle F side, the driver of the incoming vehicle F raises and lowers the safety bar 2 easily and quickly. It is possible. Further, the fall prevention safety device 1 can be returned to the safe operating state without the worker A approaching the carry-in entrance 10. That is, when the worker A performs work near the carry-in entrance 10, the fall prevention safety device 1 can always be in a safe operating state.

DESCRIPTION OF SYMBOLS 1 Fall prevention safety device 2 Safety bar 2a (Left) end part 2b (Right) end part 3 Vertical guide member
3a Lower end portion 3b Upper portion 4 Drive device 5 Power transmission mechanism 10 Carry-in port 11 (Left) Edge portion 12 (Right) Edge portion 13 Floor 21 Radio operation device 31 Mounting member 32 Fixed pulley 33 Wire 33a One end 33b Other end 34 Balance weight
35 Nut member
40 lot sticks
41 Screw shaft
42 Screw shaft S Warehouse B Luggage A Worker F Loading vehicle
X ₂ horizontal axis
Y ₁ , Y ₂ vertical axis

Claims (4)

A fall prevention safety device (1) is installed at the entrance (10) on the second floor or higher for loading and unloading the luggage (B) in the warehouse (S), and the fall prevention safety device (1) Mounting members (31) and (31) supported so as to be movable up and down along the vertical guide members (3) and (3) disposed on the left and right edges (11) and (12) of (10), and the mounting members (31 ) (31) horizontally provided and two safety bars (2) (2) disposed at predetermined intervals above and below,
Further, the fall prevention safety device (1) has a drive device (4) composed of an electric motor, and is rotated around the horizontal axis (X ₂ ) by the drive device (4). And a pair of left and right screw shafts (41, 42) connected to the left and right ends of the lot rod (40) and rotating about the vertical axis (Y ₁ ) (Y ₂ ) ( 5), the screw shafts (41) (42) are screwed onto nut members (35) (35) attached to the mounting members (31) (31), and the power of the driving device (4) is The two safety bars (2) and (2) are configured to move up and down by transmitting to the mounting members (31) and (31) via a power transmission mechanism (5),
Lower ends (3a) and (3a) of the vertical guide members (3) and (3) are disposed below the floor (13) forming the carry-in entrance (10), and the two safety bars ( 2) (2) is lowered to a position lower than the floor (13) and lifted to a load carrying state in which the carry-in entrance (10) is fully opened, and to a height position that hinders the passage of the worker (A). The power transmission mechanism (5) is movable between a safe operation state in which the carry-in port (10) is blocked and the worker (A) is prevented from dropping. A warehouse opening structure for a warehouse characterized in that an external force acting in the up-and-down direction of the safety bar (2) (2) is not transmitted to the drive device (4).   The warehouse opening structure according to claim 1, wherein the safety bar (2) is made of a pipe material that can be gripped by the worker (A).   A wire (33) is suspended from a fixed pulley (32) provided on the upper portions (3b) and (3b) of the vertical guide members (3) and (3), and one end (33a) of the wire (33) is attached to the mounting portion. The warehouse opening structure according to claim 1 or 2, wherein a balance weight (34) is connected to the member (31) and the other end (33b) of the wire (33).   The warehouse opening structure of a warehouse according to claim 1, 2 or 3, wherein the driving device (4) is controlled by a radio operating device (21) on the side of the carrying-in vehicle (F).

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