JP2013245467A - Safety fence for equipment taking-in hatch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and safely open and restore a safety fence when equipment is carried in and out.SOLUTION: There is provided a safety fence for equipment taking-in hatch constituted by providing a pair of guides 11, 11 which extend upward and downward to a stage part 3 of an equipment taking-in hatch 1, extending a lateral lifting shaft 21 between the pair of guides 11, 11, providing a plurality of engagement projection parts 23, 23 to both ends of the lifting shaft 21 along an outer periphery around the axis of the lifting shaft 21, providing a plurality of engagement recessed parts 13 engaging the engagement projection parts 23, 23 in parallel to the pair of guides 11, 11 along a vertical direction respectively, and fixing a fence member 30 to the lifting shaft 21 so as to move up and down the fence member 30 as the lifting shaft 21 moves up and down along the pair of guides 11, while the engagement projection part 23 and engagement holes or the engagement recessed parts 13 engage with each other, fitting a counter weight 31 which energizes the fence member 30 in the opposite direction from its lowering direction to the lifting shaft 21 or the fence member 30, and including a lifting operation part 40 for operating lifting of the fence member 30 on the stage part 3.

Description

  The present invention is provided in a stage of the equipment take-in hatch in an equipment take-up hatch used when a device having a relatively large equipment such as a substation or a factory is used to carry the equipment into and out of the facility. It relates to safety fences.

  In facilities that use relatively large equipment such as substations and factories, equipment take-in hatches are provided for carrying equipment into and out of the facilities, particularly on the second and higher floors.

For example, as shown in Patent Document 1, this equipment take-in hatch includes a carry-in entrance provided to be opened in a wall portion of a building constituting a facility, and a stage provided to project forward from the carry-in entrance. Is provided. The stage portion is usually provided in the vicinity of the lower end of the carry-in port portion so as to project forward in a balcony shape from the wall surface on which the carry-in port portion is provided.
A door is provided at the carry-in entrance, and the door is normally locked in a closed state. Further, a safety fence for preventing the fall is provided at the edge of the stage portion.

  This safety fence is fixed so as to rise along the edge of the floor slab constituting the stage portion when the equipment take-up hatch is not used (when equipment is not loaded / unloaded). For this reason, even if there is a person who opens the door of the carry-in entrance part, since the person is protected by the safety fence, it is not accidentally dropped from the stage part.

  When using the equipment take-in hatch (when equipment is carried in and out), open the door of the carry-in entrance, remove a part of the safety fence, and open it. Since a part of the safety fence is a movable part that is detachable or movable with respect to the stage part, such removal and opening are possible.

  In Patent Document 1, as a structure of the movable part, the fence member is connected to the edge of the concrete floor slab of the stage part or the concrete parapet part rising at both ends in the width direction of the stage part with hinges. The method of fixing the fence member so as to be freely rotatable is adopted. In addition, it is also common to use a method in which the support member of the fence member can be inserted and removed in the vertical direction with respect to the hole provided in the floor slab so that the safety fence can be attached and detached.

  When carrying in the equipment, lay a crane or the like with the movable part of the safety fence open, lift the equipment with the crane, and remove the equipment onto the stage part through the opened movable part. The device is moved laterally from the stage portion through the carry-in entrance portion and carried into the building. When the device is carried out, the reverse operation is performed.

  When the equipment is carried in and out, the crane is moved away from the building, the fence member of the movable part is returned to the original state, and finally the door of the carry-in part is closed and locked.

Japanese Utility Model Laid-Open No. 1-162518

  According to said safety fence, when carrying in / out of an apparatus, an operator must remove or move the fence member of a movable fence. This work can be done, for example, by an operator standing on the stage and manually unlocking the fence member, lifting the heavy fence member by hand, and removing or pushing or pulling by hand. I must.

  Since such work is heavy labor and is performed at a high place called a stage part, even if a safety belt is used, it is very dangerous work. Furthermore, there are many operations performed near the edge of the stage portion, and there is a possibility that parts and tools may be accidentally dropped downstairs during the operation.

  In view of this, an object of the present invention is to make it easy and safe to open and restore a safety fence at the time of equipment loading / unloading in an equipment take-in hatch provided in a substation, a factory, or the like.

  In order to solve the above problems, the present invention is used in an equipment take-in hatch including a carry-in entrance provided to be opened in a building and a stage provided to project forward from the carry-in entrance, A pair of guides extending in the vertical direction is provided on the stage portion, a horizontal lifting shaft is spanned between the pair of guides, and a plurality of guides are provided at both ends of the lifting shaft along the outer periphery around the shaft center of the lifting shaft. Engaging convex portions are provided, and the pair of guides are provided with a plurality of engaging holes or engaging concave portions in parallel with the engaging convex portions along the vertical direction. The member is fixed, and the raising and lowering shaft moves up and down along the pair of guides while the engagement convex portion and the engagement hole or the engagement concave portion are engaged with each other, so that the fence member also moves up and down. For the fence member, the fence member is in the direction opposite to its descending direction. And counterweight is attached to biasing adopted a safety fence equipment taking hatch, characterized in that it comprises a lifting operation unit that can manipulate the fence member lifting on the stage portion.

According to this configuration, when the equipment is carried in and out, the worker can easily open the safety fence simply by operating the lifting operation unit. Further, since the weight of the fence member can be offset by the counterweight, the operation does not require a force for lifting the total weight of the fence member, and can be performed with a very light force. For this reason, it is possible to easily perform a manual operation without necessarily using a driving force by a motor such as a motor.
In addition, the lifting shaft spanned between the pair of guides moves up and down while meshing with the engagement holes and recesses provided in the pair of guides, so the lifting shaft always moves up and down while moving in parallel in front view. it can. For this reason, the situation where a fence member inclines along the longitudinal direction by the weight of itself, the pulling force at the time of raising / lowering, etc. is suppressed. In other words, since both ends of the lifting shaft can always be set to move up and down at the same height, the situation where one of the fence members becomes higher or lower than the other in the direction connecting the pair of guides is suppressed. Is done. Thereby, the malfunctioning of the raising / lowering of a fence member can be prevented.

  Therefore, according to the above configuration, it is not necessary for the operator to lift and remove the heavy fence member by hand, or to push or pull it by hand, and the work is easy and Less work is done near the edges of the part, making it safer.

  In the above configuration, the pair of guides may protrude downward from the floor surface of the stage portion, and the upper end of the fence member may be retracted downward from the floor surface of the stage portion. Can do.

That is, the apparatus can be removed even if the upper end of the fence member protrudes somewhat upward from the floor surface of the stage portion. However, if the fence member does not protrude above the floor surface of the stage part, the lateral movement of the device is easy, and this form can be said to be desirable.
For this reason, here, in order to allow the upper end of the fence member to be completely retracted below the floor surface of the stage part, means for causing the pair of guides to protrude downward from the floor surface of the stage part is adopted. did. Thereby, sufficient raising / lowering height of a fence member is securable.

In each of the above configurations, the lifting shaft or the fence member and the counter weight are connected by a band-like or string-like connecting member, and the lifting operation unit is a connecting member that communicates with the counter weight, or The structure provided with the winch which can wind up the other connecting member connected to the elevating shaft or the fence member can be adopted.
If the belt-like or string-like connecting member is wound with a winch, or the winding is released, the configuration of the lifting operation unit can be simplified.

In addition, at least one counterweight may be provided for one lifting shaft (fence member). However, in order to ensure the stability of the operation, the counterweight is respectively provided on the left and right sides of the lifting shaft or the fence member. It is desirable to provide it. It is desirable that the counterweights on both sides have the same weight.
At this time, the raising / lowering operation part can be set as the structure which winds the connection member connected to one counterweight, or another connection member provided in the same side as the counterweight with a winch. Since the elevating shaft moves up and down while always moving in parallel, a configuration in which the elevating operation unit is not necessarily provided on both sides in the longitudinal direction of the fence member but can be employed.

  According to the present invention, when the equipment is carried in and out, the worker can easily open the safety fence simply by operating the lifting operation section. For this reason, unlike the conventional case, it is not necessary for the operator to lift and remove the heavy fence member by hand, or to push or pull it by hand, and the work is easy and close to the edge of the stage portion. By the way, less work is done and it is safer.

Overall view of one embodiment of the present invention (gate closed state) Overall view of the same embodiment (opened state of the gate) The principal part perspective view which shows the structure of the apparatus of the embodiment 3 is an enlarged view of the main part of FIG. The principal part enlarged view which shows the modification of FIG.

  Embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the configuration of the equipment take-in hatch 1 includes a carry-in entrance 2 that is opened in a building, and a stage 3 that is provided to project forward in the vicinity of the lower end of the carry-in entrance 2. Prepare. Further, parapet portions 4 stand up on the side edges 3b in the left-right direction of the stage portion 3, respectively.

  In this embodiment, the stage portion 3 and the parapet portion 4 have a reinforced concrete structure, but there may be other structures such as a steel frame structure. Moreover, it may replace with the parapet part 4, and the fixed fence which consists of metal members etc. may be installed.

  A safety fence 10 for equipment take-in hatch (hereinafter referred to as “safety fence 10”) provided with a gate (fence member) 30 that can be moved up and down along the front edge 3a of the stage portion 3 of this equipment take-in hatch 1. Is provided. The gate 30 is a movable part of the safety fence 10. FIG. 1 shows a closed state of the gate 30, and FIG. 2 shows an opened state of the gate 30.

  The configuration of the safety fence 10 will be described. In the vicinity of the left and right side edges 3b, 3b of the stage portion 3, a pair of guides 11, 11 extending in the vertical direction are provided. Each of the pair of guides 11 and 11 is fixed at a position protruding further forward than the front edge 3a of the stage portion 3, and a wide space in the front-rear direction on the stage portion 3 is secured.

  Further, two rails 25, 25 are arranged in parallel with the left and right guides 11, 11. A slider 24 is disposed between the two rails 25 and 25. The slider 24 is guided to move in the vertical direction along the rail 25 by a roller 26. These guides 11 and rails 25 are protected by a cover 20.

  A horizontal elevating shaft 21 is spanned between the pair of guides 11 and 11. Both ends of the elevating shaft 21 pass through sliders 24 arranged on the respective sides, and a pinion gear 22 is attached to the outside thereof. The pinion gear 22 and the elevating shaft 21 rotate integrally around the axis.

  The teeth of the pinion gear 22 are engaging convex portions 23 arranged at equal intervals along the outer periphery around the axis of the elevating shaft 21. In this embodiment, the pair of guides 11 and 11 are racks, and a plurality of engaging recesses 13 that mesh with the engaging protrusions 23 along the vertical direction are provided in parallel at equal intervals.

A gate 30 is fixed to the lifting shaft 21. The elevating shaft 21 is fixed along the upper edge of the gate 30, and the elevating shaft 21 and the gate 30 move up and down integrally.
This vertical movement is performed by the elevating shaft 21 moving up and down along the guide 11 while the teeth of the pinion gear 22 (the engaging convex portion 23) and the groove of the guide 11 (the engaging concave portion 13) are engaged with each other. Is called. The gate 30 also moves up and down as the lifting shaft 21 moves in parallel in the vertical direction while maintaining a horizontal state.

Further, the counter weight 31 is attached to the slider 24 via a connecting member 32 (hereinafter referred to as “first connecting member 32 a”). The connecting member 32 extends upward from the connection portion to the slider 24, changes its direction by 90 degrees at the two pulleys 33 and 33, is guided downward, and is connected to the counterweight 31.
In this way, the counterweight 31 is connected to the left and right sliders 24, respectively, and biases the lifting shaft 21 and the gate 30 in a direction (upward) opposite to the lowering direction (downward) of the lifting shaft 21 and gate 30. .

  In this embodiment, a metal wire is used as the first connecting member 32a, but if the material has a predetermined strength that can withstand the weight of the gate 30 and a certain degree of flexibility (flexibility), It may be a strip-like or string-like rope, steel, or other longitudinal material.

  Further, a connecting member 32 (hereinafter referred to as “second connecting member 32 b”) different from the connecting member 32 communicating with the counterweight 31 is connected to one slider 24 shown on the left side in the drawing. The second connecting member 32b also uses a metal wire, but if it is a material having a predetermined strength that can withstand the weight of the gate 30 and a certain degree of flexibility (flexibility), it is a strip or string. A long rope-like material may be used.

Similarly, the second connecting member 32 b extends upward from the connecting portion to the slider 24, changes its direction by 90 degrees at the two pulleys 33, 33, is guided downward, and is connected to the winch 41.
The winch 41 can wind up the second connecting member 32b by manually rotating the operation portion (handle), and can release the winding by rotating in the reverse direction.

Further, another connecting member 32 (hereinafter referred to as “third connecting member 32 c”) extends downward from the connecting portion to the slider 24, and is directed 90 degrees by the two pulleys 33 and 33. Instead, it is guided upward and connected to the same winch 41. The material of the third connecting member 32c is the same as described above.
The winch 41 can manually wind the second connecting member 32b and open the third connecting member 32c by turning the operation portion (handle) manually, and can also rotate the winch 41 in the reverse direction. For example, the third connecting member 32c can be wound and the second connecting member 32b can be unwound.

  As described above, the connecting member 32, the winch 41, and the like constitute an elevating operation unit 40 that can operate the elevating and lowering of the gate 30 on the stage unit 3. The raising / lowering operation part 40 is located behind the gate 30, that is, at a position close to the carry-in part 2, and can be operated at a safe position relatively far from the front edge 3 a of the stage part 3.

  The operation of raising and lowering the gate 30 at the time of equipment loading will be described. First, the door 5 of the carry-in entrance 2 is opened, and the gate 30 of the safety fence 10 is lowered. At this time, as shown in FIG. 2, the protection member 35 for alerting with a rope or tape is passed between the parapet parts 4 and 4 to alert the operator about the gate 30 being lowered. May be.

  The gate 30 can be lowered by manually rotating the operating portion of the winch 41 to wind up the second connecting member 32b and to release the winding of the third connecting member 32c. At this time, simultaneously with the raising of the gate 30, the counterweight 31 connected by the first connecting member 32a is lowered.

The gate 30 is lowered, a crane or the like is laid down with the safety fence 10 opened, the equipment is lifted by the crane, and the equipment is taken down onto the stage unit 3 through the opened part. The device is moved laterally from the stage portion 3 through the carry-in entrance portion 2 and carried into the building.
The operation part of the winch 41 can be locked at an arbitrary position by a lock mechanism using a screw or the like. For this reason, the gate 30 can be locked so as not to move in the lowered state.

  When the equipment is loaded, the crane is moved away from the building and the gate 30 is raised.

  The gate 30 is lifted by unlocking and rotating the operation part of the winch 41 by hand to wind up the third connecting member 32c and to open the second connecting member 32b. Can do. At this time, simultaneously with the lowering of the gate 30, the counterweight 31 connected by the first connecting member 32a is raised. Then, the gate 30 is locked so as not to move in the raised state by the lock mechanism.

  Finally, the door 5 of the carry-in port 2 is closed and locked. When the equipment is carried out, the reverse flow is made.

  As described above, when the equipment is carried in and out, the operator can easily raise and lower the gate 30 of the safety fence 10 by simply operating the winch 41 of the lifting operation unit 40 by hand. . The operation can cancel the weight of the gate 30 with the counterweight 31, so that a force for lifting the total weight of the gate 30 is not necessary and a very light force is possible. For this reason, it is possible to easily perform a manual operation without necessarily using a driving force by a motor such as a motor.

  In addition, the lifting shaft 21 spanned between the pair of guides 11 and 11 is lifted and lowered while meshing with the engaging recesses 13 provided in the guides 11 and 11 at both ends thereof, so that the lifting shaft 21 always moves in parallel in front view. It can be set to move up and down. For this reason, the situation where the gate 30 inclines right and left by the weight of itself, the tensile force of the raising / lowering operation part 40 at the time of raising / lowering, etc. is suppressed. That is, since the left and right ends of the elevating shaft 21 can always be set up and down at the same height, one of the gates 30 becomes higher or lower than the other in the direction connecting the pair of guides 11 and 11. Is suppressed. Thereby, malfunction of raising / lowering of the gate 30 can be prevented.

  Therefore, unlike the prior art, it is not necessary for the operator to lift and remove the heavy fence member by hand, or to push or pull it by hand, and the work is easy and close to the edge of the stage portion 3. By the way, less work is done and it is safer.

In addition, since the pair of guides 11 and 11 are provided so as to protrude downward from the floor surface of the stage portion 3, it is possible to ensure a wider range of the gate 30 in the downward direction.
In this embodiment, the upper end of the gate 30 (corresponding to the elevating shaft 21 in this embodiment) can be withdrawn below the floor surface of the stage unit 3, so that the equipment on the stage unit 3 can be removed. It is easy to pull up and move horizontally.

  Further, since the gate 30 moves down below the floor surface of the stage portion 3, when the door 5 hinged to the carry-in entrance portion 2 is rotated outward and opened, the door 5 There is no hindrance to the gate 30.

  Further, since the pair of guides 11 and 11 protrude forward from the front end 3a of the stage portion 3, a large space on the stage portion 3 can be secured even when the gate 30 is raised. If the space on the stage unit 3 is large, it is easy to remove, lift and laterally move the device on the stage unit 3, and it is possible to secure a wide open / close space for the door 5 that opens outward.

  FIG. 5 shows a modification of this embodiment. This modification employs a chain instead of a rack as the pair of guides 11 and 11.

  Sprockets 22 are attached as rotating members 22 to both ends of the lifting shaft 21. The sprocket 22 and the elevating shaft 21 rotate integrally around the axis.

  The teeth of the sprocket 22 are engaging projections 23 arranged at equal intervals along the outer periphery around the axis of the elevating shaft 21. In the pair of guides 11, 11 formed of chains, a plurality of engagement holes 13 that mesh with the engagement protrusions 23 are provided in parallel at equal intervals along the vertical direction. Other configurations are the same as those described above.

  In these embodiments, the slider 24 that moves up and down integrally with the lifting shaft 21 and the gate 30 and the counterweight 31 are connected by a connecting member 32 made of a wire, and the lifting operation unit 40 is connected to the slider 24. Although the winch 41 that can wind up the other connecting member 32 is provided, the configuration of the lifting operation unit 40 is not limited to this embodiment, and the connection member 32 that leads to the counterweight 31 and the lifting operation unit 40 are connected. The arrangement and configuration of the connecting member 32 are arbitrary as long as the raising / lowering function of the gate 30 can be exhibited.

  For this reason, for example, the connecting member 32 that communicates with the counterweight 31 and the connecting member 32 that communicates with the lifting operation unit 40 may be a connecting member 32 made of a single continuous material.

DESCRIPTION OF SYMBOLS 1 Equipment take-in hatch 2 Carry-in part 3 Stage part 3a Front edge 3b Side edge 4 Parapet part 5 Door 10 Safety fence (Safety fence for equipment take-in hatch)
11 Guide 12 Rotating member 13 Engaging recess (engaging hole)
20 Cover 21 Lifting shaft 22 Rotating member 23 Engaging convex portion 24 Slider 25 Rail 26 Roller 30 Gate (fence member)
31 counter weight 32 connecting member 32a first connecting member 32b second connecting member 32c third connecting member 33 pulley 35 protective member 40 elevating operation part 41 winch

Claims (3)

Used in an apparatus take-in hatch (1) provided with a carry-in entrance part (2) provided open to a building and a stage part (3) provided projecting forward from the carry-in entry part (2), A pair of guides (11, 11) extending in the vertical direction are provided on the stage portion (3), and a horizontal elevating shaft (21) is spanned between the pair of guides (11, 11), and the elevating shaft (21) A plurality of engaging projections (23, 23) are provided at both ends of the guide shaft along the outer periphery around the axis of the lifting shaft (21), and the pair of guides (11, 11) are respectively provided along the vertical direction. A plurality of engagement holes or engagement recesses (13, 13) meshing with the engagement protrusions (23, 23),
A fence member (30) is fixed to the elevating shaft (21), and the elevating shaft (21) meshes with the engaging convex portions (23, 23) and the engaging holes or engaging concave portions (13, 13). While moving up and down along the pair of guides (11, 11), the fence member (30) is also raised and lowered, and the fence member (30) is attached to the lift shaft (21) or the fence member (30). A counterweight (31) for urging in the direction opposite to the descending direction is attached, and an elevating operation part (40) capable of operating the fence member (30) up and down on the stage part (3) is provided. A safety fence for equipment take-up hatches.   The pair of guides (11, 11) protrudes downward from the floor surface of the stage portion (3), and the upper end of the fence member (30) can be retracted downward from the floor surface of the stage portion (3). The safety fence for equipment take-in hatch according to claim 1, wherein   The elevating shaft (21) or the fence member (30) and the counterweight (31) are connected by a band-like or string-like connecting member (32), and the elevating operation part (40) is the counter A winch (41) capable of winding the connecting member (32) communicating with the weight (31), or the other connecting member (32) connected to the elevating shaft (21) or the fence member (30). The safety fence for equipment take-in hatch according to claim 1 or 2.

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