JP6418607B2 - Fall prevention device - Google Patents

Description

  The present invention relates to a crash prevention device for installing, on a temporary scaffold, a fall prevention rope used when, for example, the uppermost layer of a temporary scaffold placed around a building is constructed.

  Generally, when constructing a temporary scaffold with a plurality of layers, a fall prevention rope is stretched on the uppermost layer. When this fall prevention rope is stretched, after the worker locks the fall prevention rope to the upper end of the fall prevention member in the layer one layer below the uppermost layer, the fall prevention member is moved along the scaffolding column. Then, it is lifted up to a predetermined position on the uppermost layer, and in this state, the lower part of the fall prevention member is fixed to the scaffolding column with a clamp fitting. Next, the worker goes up to the uppermost layer, where the fall prevention rope is pulled with a tensioner so as not to be loosened.

  When removing the fall prevention rope, the operator loosens the fall prevention rope at the uppermost layer and then descends to the layer one level lower than the uppermost layer. At that layer, the operator loosens the clamp and removes the fall prevention member from the scaffolding column. Such an operation is repeated. Therefore, the work of laying the fall prevention rope is complicated because it is necessary to ascend and descend the uppermost layer and the layer below it.

  This type of fall prevention member is disclosed in Patent Document 1. The fall prevention member includes a lower locking portion having a lower locking claw and a lower pole having a rope tensioner, and an upper locking portion having an upper locking claw and an upper pole having a rope locking portion. It is configured to be connected at the bent part. On the other hand, on the peripheral surface of the vertical support column erected on the ground, pockets engaged with the lower locking claw and the upper locking claw are provided, for example, 90 degrees out of phase in the circumferential direction. And the said lower latching claw and the upper latching claw engage with the pocket from which a phase differs, and a fall prevention member is attached to a vertical support | pillar.

JP 2009-35882 A

  In the conventional fall prevention member described in Patent Document 1, when a rope is stretched, after the rope is hung on the rope locking portion of the upper pole, the pole is lifted and the upper locking claw is used as a vertical support. At the same time, the lower locking claw is inserted into the pocket below the lower locking portion of the vertical column. In this way, the upper locking claw and the lower locking claw must be engaged with the pocket of the upper locking portion and the lower locking portion of the vertical support, respectively, and when the engagement is released after use Each must have a separate release operation. Therefore, the structure of the fall prevention member is complicated, and there is a drawback that the engaging operation and the releasing operation are troublesome.

  In addition, since the upper pole and the lower pole are configured to be 90 degrees out of phase through the bent portion, the engagement of the upper locking claw and the lower locking claw with respect to the pocket of the vertical column There is also a problem that the simultaneous engagement operation and the release operation are complicated and time is required for the operation.

  The present invention has been made paying attention to such problems existing in the prior art, and the object of the present invention is simple and easy and quick to engage and disengage the scaffold struts. Another object of the present invention is to provide a crash prevention device that can be performed in a short time.

  In order to achieve the above-described object, the fall prevention device of the present invention is configured such that a locking member for locking a fall prevention rope provided on the uppermost layer of a building scaffold composed of a plurality of layers is used as a wedge support for a scaffolding column. A fall prevention device for supporting, wherein the locking member is provided with a wedge member that is fitted into a wedge receiver of a support for a scaffold, and the wedge member has a branch portion that extends in parallel. A lock member that engages with the wedge receiver and restricts the movement of the locking member is rotatably supported, and an operation member that rotates the lock member to release the engagement rotates. Connected as possible.

It is preferable that the lock member has an inclined surface that engages with the wedge receiver of the scaffolding column by its own weight and rotates the lock member.
A rotation shaft is fixed to the lock member, and the lock member is rotatably connected to the branch portion of the wedge member by the rotation shaft, and the operation member is rotated by the connection shaft with respect to the lock member. It is preferable to be configured so as to release the engagement between the lock member and the wedge support of the scaffolding column by lifting the operating member and rotating the lock member.

  A gap is formed between the lock member and the wedge receiver so that the lock member does not interfere with the wedge receiver when the lock member is rotated by the operation member in a state where the lock member can be engaged with the wedge receiver of the scaffolding column. It is preferable.

The operation member is preferably set to a length that can be operated in a layer one layer below the uppermost layer of the building scaffold.
It is preferable that the operating member is inserted and held in a long cylindrical body, and a wedge body that engages with a wedge support of a scaffolding column is provided at a lower portion of the cylindrical body.

  According to the fall prevention device of the present invention, there is an effect that the configuration is simple and the engaging operation and the releasing operation with respect to the scaffolding strut can be easily and quickly performed.

The perspective view which shows the principal part of the fall prevention apparatus in embodiment. The disassembled perspective view which shows the state which connects a lock member to the branch part of the wedge member which latches a fall prevention rope, and connects an operation member to the lock member. Explanatory drawing which shows the state which locked the fall prevention apparatus with respect to the wedge receptacle of the support | pillar for scaffolds, and the state which released the lock | rock with the operation member. The schematic explanatory drawing which shows the state which stood up the several support | pillar for scaffolds, connected the horizontal support | pillar to these support | pillar support | pillars, formed the multi-layered scaffold, and laid the fall prevention rope to the uppermost layer with the fall prevention apparatus. The perspective view which shows the state which the lock member of a fall prevention apparatus is located above the wedge receptacle of the support | pillar for scaffolds. FIG. 6 is a perspective view showing a state in which the lock member is lowered and the inclined surface is engaged with the upper end edge of the wedge receiver. The perspective view which shows the state which a locking member descends along the side surface of a wedge receiver. The perspective view which shows the state which the lock member reached the lower end part of the side surface of the wedge receiver. FIG. 6 is a perspective view showing that the lock member and the wedge receiver are disengaged as the lock member descends, and the lock member is positioned below the wedge receiver and is in a locked state.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
As shown in FIG. 4, a plurality of cylindrical pillars (vertical pillars) 12 having a cylindrical shape are erected on the ground 11 along a periphery of a building (not shown) at a constant interval on the left and right. A plurality of horizontal struts 13 are connected between the scaffolding struts 12 using wedge receivers 14 facing the left and right of the scaffolding struts 12 at regular intervals in the vertical direction.

  As shown in FIGS. 4 and 5, the wedge receiver 14 is provided on the outer periphery of the scaffolding column 12 with an interval of 90 degrees. The front and rear wedge receivers 14 are provided at higher positions than the left and right wedge receivers 14. At the position of the horizontal struts 13, scaffolding plates 15 are installed between the scaffolding struts 12. A pair of upper and lower handrails 16 are supported at a predetermined distance from each other at the upper and lower intermediate positions of the horizontal struts 13 installed on the scaffolding struts 12.

  FIG. 4 shows a state in which the scaffold of the second layer 18 is constructed on the scaffold of the first layer 17 in the scaffold composed of a plurality of layers above and below. A fall prevention rope (rope) 22 locked to the locking member 21 of the fall prevention device 20 is bridged between the predetermined scaffolding struts 12 on the wedge receiver 14 in the middle portion of the second layer 18. ing.

  As shown in FIGS. 1 and 2, three hooks 23 are fixed to the upper side of the locking member 21 at regular intervals in the direction of the horizontal strut 13, and a fall prevention rope 22 is inserted into these hooks 23. Locked. The three hooks 23 have substantially the same C shape, and are arranged so that their openings are alternately positioned in the front-rear direction, so that the fall prevention rope 22 does not come out of the hooks 23.

  As shown in FIG. 2, a plate-like wedge member 24 inserted into the wedge receiver 14 of the scaffolding column 12 extends downward from the lower portion of the locking member 21. A plate-like branching portion 25 extending downward in parallel with the wedge member 24 is formed on the side portion of the wedge member 24. A circular through hole 26 is formed in the lower portion of the branch portion 25.

  The locking member 27 connected to the branch portion 25 of the locking member 21 is formed in a U-shaped cross section by a plate material, and a pair of circular holes 28 are formed at opposite positions on both side walls 27a and 27b. Is open. Then, in a state where the branch portion 25 of the locking member 21 is interposed between the both side walls 27 a and 27 b of the lock member 27, the columnar rotation shaft 29 is inserted into the insertion hole 28 of one side wall 27 a of the lock member 27. Further, it passes through the through hole 26 of the branch portion 25 and is inserted into the insertion hole 28 of the other side wall 27 b of the lock member 27. In this state, the rotation shaft 29 is fixed to the both side walls 27 a and 27 b of the lock member 27, so that the lock member 27 is rotatably connected to the branch portion 25 of the locking member 21.

  As shown by the solid line in FIG. 3, the lock member 27 is locked (engageable) facing the lower end surface of the wedge receiver 14 of the scaffolding column 12 in a state where the upper end surface of the lock member 27 is horizontal. State). In other words, as shown in FIG. 2, one side wall 27 a of the lock member 27 is formed longer than the other side wall 27 b, and a longer part of the one side wall 27 a is a lock portion 30. In the locked state of the lock member 27, when an external force is applied to the fall prevention rope 22 and the locking member 21 is raised, the upper end surface of the lock portion 30 of the lock member 27 is engaged with the lower end surface of the wedge receiver 14 and locked. The movement of the member 21 is stopped.

  An inclined surface 31 is provided on the lower end surface of one side wall 27a of the lock member 27 so that the side wall 27a becomes narrower toward the end. The inclination angle of the inclined surface 31 is set to about 45 degrees with respect to the upper end surface of the lock portion 30. As shown in FIGS. 6 to 8, when the lock member 27 is lowered, the inclined surface 31 of the lock member 27 engages with the upper end edge of the wedge receiver 14, and the lock member 27 is moved by the dead weight of the lock member 27 as shown in FIG. ~ Lowering while rotating clockwise in FIG. As shown in FIG. 9, when the lock member 27 is further lowered, the inclined surface 31 of the lock member 27 is not engaged with the wedge receiver 14, and the lock member 27 is rotated counterclockwise in FIG. 27 is placed in a locked state.

  As shown in FIG. 2, a female screw hole 32 is screwed into the end of one side wall 27 a of the lock member 27. The operation member 33 for releasing the lock state of the lock member 27 is formed of a plate material with a lower portion having an inverted L shape and an upper portion having a substantially inverted U shape. A circular coupling hole 34 is opened at the lower end of the operation member 33. A male screw 35 having a male screw shaft serving as a connecting shaft 35a is inserted into the coupling hole 34 through a collar 39 that adjusts the amount of screwing, and is screwed into the female screw hole 32 of the lock member 27, thereby operating. The member 33 is rotatably connected to the lock member 27.

  Then, as shown by a two-dot chain line in FIG. 3, by lifting the operation member 33, the operation member 33 rotates about the rotation shaft 29 of the lock member 27 in the clockwise direction in FIG. And the wedge receiver 14 are disengaged. A gap d is formed between the upper end surface of the lock portion 30 of the lock member 27 and the lower end surface of the wedge receiver 14 in the locked state so that the lock member 27 does not interfere with the wedge receiver 14 when the lock member 27 is rotated. Is formed.

  When the lock member 27 is rotated, the operating member 33 moves from the position shown by the solid line in FIG. 3 to the position shown by the two-dot chain line, that is, moves away from the scaffolding column 12. It is preferable to form a space in a cylindrical cylinder 37 described later by a corresponding length.

  As shown in FIGS. 3 and 5, an elongated operation rod 36 is joined to the outer end portion of the operation member 33 so as to extend downward. The outer end portion of the operation member 33 and the operation rod 36 are inserted and held in a long cylindrical body 37. An inverted L-shaped wedge body 38 is connected to the lower end portion of the cylindrical body 37 and is configured to be engaged with the wedge receiver 14 of the scaffolding column 12.

  As shown in FIG. 4, the operation member 33 having the operation rod 36 is set to a length that can be operated in a layer one layer lower than the uppermost layer of the building scaffold. That is, in FIG. 4, the operation member 33 is set to a length that can be operated in the first layer 17 that is one lower than the second layer 18.

Next, an effect | action is demonstrated about the fall prevention apparatus 20 comprised as mentioned above.
As shown in FIGS. 4 and 5, when the fall prevention rope 22 is stretched between the scaffolding struts 12 using the fall prevention apparatus 20, the hook 23 of the fall prevention apparatus 20 is attached to the first layer. The fall prevention rope 22 is locked. Next, the cylindrical body 37 is lifted and the operation rod 36 of the operation member 33 is operated to place the lock member 27 at a position above the wedge receiver 14 of the second layer of the scaffolding column 12.

  Subsequently, as shown in FIG. 6, when the cylindrical body 37 is lowered, the lower end portion of the wedge member 24 is inserted into the wedge receiver 14 of the scaffolding column 12, and the lock member 27 is lowered by its own weight. The inclined surface 31 of the member 27 abuts on the upper end edge of the wedge receiver 14. At this time, the lock member 27 is lowered while the inclined surface 31 of the lock member 27 is in contact with the upper edge of the wedge receiver 14, so that the lock member 27 rotates around the rotation shaft 29 in the clockwise direction in FIG. 6. Move.

  Next, as shown in FIGS. 7 and 8, when the cylinder 37 is pulled down and the lock member 27 is lowered, the wedge member 24 is inserted into the wedge receiver 14 and the lock member 27 is rotated about 45 degrees. Thus, the distal end portions of the lock member 27 and the operation member 33 are lowered to the lower end portion of the side wall portion 14 a of the wedge receiver 14 while slidingly contacting the outer surface of the side wall portion 14 a of the wedge receiver 14.

  Subsequently, as shown in FIG. 9, when the cylindrical body 37 is further pulled down to lower the lock member 27, the wedge member 24 is sufficiently inserted into the wedge receiver 14, and the lock member 27 and the operation member 33 with respect to the wedge receiver 14. 9 is released, and the lock member 27 rotates about the rotation shaft 29 counterclockwise in FIG. In this state, the lock portion 30 of the lock member 27 can be engaged with the wedge receiver 14. That is, when an external force is applied to the locking member 21 and the lock member 27 is moved upward, the upper end surface of the lock portion 30 of the lock member 27 is engaged with the lower end surface of the wedge receiver 14 to restrict the upward movement of the lock member 27. It is supposed to be.

  As shown in FIG. 4, the above-described engagement operation is also performed on the other scaffolding pillars 12. In this state, by pulling the fall prevention rope 22 locked to the hook 23 of the locking member 21 with a tensioner (not shown), the installation of the fall prevention rope 22 is completed.

  Next, as shown by a two-dot chain line in FIG. 3, when removing the fall prevention rope 22, after releasing the tension state of the fall prevention rope 22 by the tensioner, the operation rod 36 is pushed up to raise the operation member 33. Then, the lock member 27 rotates about the rotation shaft 29 in the clockwise direction in FIG. 3, and the locked state between the upper end surface of the lock portion 30 of the lock member 27 and the lower end surface of the wedge receiver 14 is released. . As described above, the engaging operation and the releasing operation of the lock member 27 can be performed in the first layer 17 that is one layer below the second layer 18 that is the uppermost layer.

The effects exhibited by the above embodiment will be described collectively below.
(1) In the fall prevention device 20 of the present embodiment, the locking member 21 is provided with a wedge member 24 that is fitted into the wedge receiver 14 of the scaffolding column 12, and the wedge member 24 extends in parallel. A locking member 27 that engages with the wedge receiver 14 and restricts the movement of the locking member 21 is rotatably supported at the branch portion 25. An operation member 33 for rotating the lock member 27 to release the engagement is rotatably connected to the lock member 27.

  For this reason, the locking member 21 can be placed in the locked state by rotating the lock member 27 so as to be engageable with the wedge receiver 14. On the other hand, the locking member 21 can be returned to the unlocked state by operating the operation member 33 to release the engagement of the lock member 27 with the wedge receiver 14.

Therefore, according to the fall prevention device 20 of the embodiment, the configuration is simple, and the engaging operation and the releasing operation with respect to the scaffolding column 12 can be easily and quickly performed.
(2) The lock member 27 has an inclined surface 31 that engages with the wedge receiver 14 of the scaffolding column 12 by its own weight and rotates the lock member 27. For this reason, the lock operation of the lock member 27 can be performed easily and quickly using the weight of the lock member 27.

  (3) A rotation shaft 29 is fixed to the lock member 27, and the lock member 27 is rotatably connected to the branch portion 25 of the wedge member 24 by the rotation shaft 29, and the operation member 33 is The lock member 27 is rotatably connected by a connecting shaft 35a. The operation member 33 is lifted and the lock member 27 is rotated to release the engagement between the lock member 27 and the wedge receiver 14.

Accordingly, by lifting the operation member 33 and rotating the lock member 27, the engagement between the lock member 27 and the wedge receiver 14 can be easily and quickly released.
(4) Between the lock member 27 and the wedge receiver 14 in a state where the lock member 27 can be engaged with the wedge receiver 14 of the scaffolding column 12, the lock member 27 is rotated when the lock member 27 is rotated by the operation member 33. A gap d that does not interfere with the wedge receiver 14 is formed. For this reason, when the engagement of the lock member 27 with the wedge receiver 14 is released, the release operation can proceed smoothly without the lock member 27 interfering with the wedge receiver 14.

  (5) The operation member 33 is set to a length that can be operated in a layer one layer below the uppermost layer of the building scaffold. Therefore, when the fall prevention rope 22 is stretched, the engagement operation and the release operation of the lock member 27 can be performed in one layer below the uppermost layer, and the fall prevention rope 22 can be efficiently stretched.

  (6) The operation member 33 having the operation rod 36 is inserted and held in the long cylindrical body 37, and engages with the wedge receiver 14 of the scaffolding column 12 at the lower part of the cylindrical body 37. A wedge body 38 is provided. Therefore, the operating member 33 is protected by the cylindrical body 37, and the lower portion of the cylindrical body 37 is engaged with the wedge receiver 14, so that the operating member 33 can be accurately operated in a stable state.

It should be noted that the embodiment described above can be modified and embodied as follows.
The shape of the cylinder 37 that protects the operation member 33 may be changed to a square cylinder or the like, or the cylinder 37 may be omitted.

The operation member 33 and the operation rod 36 may be integrally formed.
The inclination angle of the inclined surface 31 of the lock member 27 may be changed as appropriate to 40 degrees, 50 degrees, or the like.

  DESCRIPTION OF SYMBOLS 12 ... Scaffolding support | pillar, 14 ... Wedge receptacle, 20 ... Fall prevention device, 21 ... Locking member, 22 ... Fall prevention rope, 24 ... Wedge member, 25 ... Branch part, 27 ... Lock member, 29 ... Turning axis, DESCRIPTION OF SYMBOLS 31 ... Inclined surface, 35a ... Connecting shaft, 33 ... Operation member, 36 ... Operation rod which comprises an operation member, 37 ... Cylindrical body, 38 ... Wedge body, d ... Gap.

Claims (6)

A fall prevention device for supporting a locking member for locking a fall prevention rope provided on the uppermost layer of a building scaffold composed of a plurality of layers with a wedge support of a support for a scaffold,
The locking member is provided with a wedge member that is fitted into the wedge support of the scaffolding strut. The wedge member has a branch portion extending in parallel, and the branch portion engages and locks the wedge receiver. A locking member for restricting the movement of the member is rotatably supported, and the locking member is rotatably connected to an operating member for rotating the locking member to release the engagement. .   The fall prevention device according to claim 1, wherein the lock member has an inclined surface that engages with a wedge receiver of a scaffolding column by its own weight and rotates the lock member.   A rotation shaft is fixed to the lock member, and the lock member is rotatably connected to the branch portion of the wedge member by the rotation shaft, and the operation member is rotated by the connection shaft with respect to the lock member. The fall prevention device according to claim 2, wherein the fall prevention device is configured to be coupled so as to release the engagement between the lock member and the wedge support of the scaffolding column by lifting the operation member and rotating the lock member. .   A gap is formed between the lock member and the wedge receiver so that the lock member does not interfere with the wedge receiver when the lock member is rotated by the operation member in a state where the lock member can be engaged with the wedge receiver of the scaffolding column. The fall prevention device according to any one of claims 1 to 3.   The fall prevention device according to any one of claims 1 to 4, wherein the operation member is set to a length that can be operated in a layer one lower than an uppermost layer of a building scaffold.   6. The operating member is inserted and held in a long cylindrical body, and a wedge body is provided at a lower portion of the cylindrical body to engage with a wedge holder of a scaffolding column. The fall prevention device according to any one of the above.

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