JP6527098B2 - Forceps fall prevention device - Google Patents

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a forceps overturn preventing device capable of sandwiching an eaves of a building from above and below, and reducing overturning of forceps.

  The conventional ladder fall prevention device holds a clamp body for clamping the eaves of a building from above and below, and a pair of ladders for holding the left and right ends of the upper end side of the ladder supported on the opposite side to the clamping part side of the clamp body. What is known is a device including: (See Patent Document 1).

  In the forceps overturn preventing device described in Patent Document 1, the clamp body is an arc upper clamp and a lower clamp that are convex upward and downward in a side view, and a clamping portion opening and closing the upper clamp and the lower clamp. And a drive mechanism. In this ladder fall prevention device, the clamp body is lifted by holding the lifting bar fitted to the clamp body on the ground, and the upper clamp and the clamp bar are fitted from the ground by operating the open / close operation rod fitted to the clamp body. The lower clamp is operated to open and close.

JP, 2016-35190, A

  However, although the conventional forceps fall prevention device can reduce the fall of the forceps, it lifts the clamp body by holding the lifting bar on the ground and operates the open / close operation bar from the ground while the upper clamp Because holding the lifting rod and the opening / closing rod by one person is heavy and heavy, and the lifting posture becomes unstable, it is difficult to open and close the upper clamp and the lower clamp. There was a problem.

  Then, in view of the above-mentioned circumstances, an object of the present invention is to provide a forceps overturn prevention device which can easily turn over an upper clamp and a lower clamp while reducing a fall of a forceps.

If means for achieving the above object is shown with reference numerals of the drawings, the forceps fallover prevention device 1 according to the invention of claim 1 is attached to the forceps L and holds the eaves tip E of the building B from above and below Upper clamp 2 and lower clamp 3 ;
An opening / closing operation rope 4 having one end 4a fixed to the upper clamp 2 and / or the lower clamp 3 and opening / closing the upper clamp 2 and / or the lower clamp 3 from the ground G using the other end 4b ;
A pulley 5 that the opening and closing operation rope 4 is guided, the Bei example,
The pulley 5 has a fixed pulley 51 fixed to the side of the second step L22 (ladder L) to which the upper clamp 2 is attached, and a moving pulley 52 fixed to the central portion of the lower clamp 3;
The open / close operation rope 4 has one end 4a fixed to the central portion of the second step L22 (ladder L) or its proximity, and the other end 4b is guided in order of the moving pulley 52 and the fixed pulley 51 to the ground G It is characterized in that it is extended downward .

According to a second aspect of the invention, the ladder fall prevention device 1 of the first aspect, the wire rope 6a having a base end portion 6a2,6b2 is fixed to the second踏桟L22 the upper clamp 2 is attached (ladder L), 6b The tip portions 6a1 and 6b1 of the wire ropes 6a and 6b are connected to the proximity portion of the central portion of the second step L22 (the forceps L) to which the upper clamp 2 is attached, and one end 4a of the open / close operation rope 4 And an annular member 6c to be fixed.

According to the invention of claim 3 , in the forceps overturn preventing device 1 of claim 1 or 2, the other end 4b of the opening / closing operation rope 4 is provided at the other end 4b and engaged with the twelfth tread L212 (forceps L) close to the ground G. It is characterized by further comprising a hook 7a for stopping, and a tensioning portion 7b for tensioning the open / close operation rope 4 from the ground G in a state where the hook 7a is locked to the twelfth step L212 (forceps L).

In the invention according to claim 4 , in the forceps fallover preventing device 1 according to any one of claims 1 to 3 , the lower clamp 3 is rotatably attached to the through hole L3 penetrating the step L2 of the forceps L. A rotary shaft 34 and a lower clamp fixing member 36 detachably fixed to the rotary shaft 34 projecting laterally from the through hole L3 of the forceps L are characterized.

In the invention according to claim 5 , in the forceps fallover preventing device 1 according to any one of the above claims 1 to 4 , the upper clamp 2 locks the tip end E1 of the eaves tip E when the eaves tip E is held. It is characterized by having a piece 23b.

  Hereinafter, the effects of the present invention will be described with reference to the drawings. In the forceps fallover prevention device 1 according to the invention of claim 1, the upper clamp 2 and the lower clamp 3 are attached to the forceps L, and the eaves tip E of the building B is clamped from above and below by the upper clamp 2 and the lower clamp 3 of the forceps L I am trying to do it. Therefore, the fall of the forceps L can be reduced. Furthermore, since the open / close operation rope 4 for opening / closing the upper clamp 2 and the lower clamp 3 from the ground G is provided, it is not necessary to operate the open / close operation rod from the ground G while gripping the lifting rod with the ground G as in the prior art. Therefore, the opening and closing operation of the upper clamp 2 and the lower clamp 3 can be easily performed.

According to the invention of claim 1 , since the pulley 5 to which the opening and closing operation rope 4 is guided is further provided, the extension direction of the opening and closing operation rope 4 can be easily changed from the upper direction to the lower direction by the pulley 5.

According to the invention of claim 1 , the pulley 5 is fixed to the central portion of the lower clamp 3 and the fixed pulley 51 fixed to the side of the second step L22 (the insulator L) to which the upper clamp 2 is attached. The one end 4a is fixed to the central portion of the second step L22 (ladder L) or its proximity portion, and the other end 4b is a moving pulley 52 and a fixed pulley. Since it is guided in order of 51 and extends downward toward the ground G, the other end 4b of the open / close operation rope 4 is loosened or the other end 4b of the open / close operation rope 4 is pulled (open / close operation rope 4 The lower clamp 3 can be opened and closed from the ground G by moving the other end 4b in the vertical direction). Furthermore, since the lifting force of the lower clamp 3 can be halved by the moving pulley 52, the opening and closing operation of the lower clamp 3 can be easily performed. In addition, since the one end portion 4a is fixed to the central portion of the second step L22 (the ladder L) or its proximity portion and the moving pulley 52 is fixed to the central portion of the lower clamp 3, the force is uniform. Therefore, the lower clamp 3 can be lifted in a stable state, so that the opening and closing operation of the lower clamp 3 can be easily performed. Furthermore, since the open / close operation rope 4 is extended downward from the side portion of the second step L22 (ladder L) by the fixed pulley 51 fixed to the side portion of the second step L22 (ladder L), the worker When climbing the ladder L using the step L2 of the ladder L, the situation where the opening / closing operation rope 4 becomes an obstacle can be reduced.

According to the invention of claim 2, the wire ropes 6a and 6b in which the base end portions 6a2 and 6b2 are fixed to the second step L22 (the forceps L) to which the upper clamp 2 is attached, and the second to which the upper clamp 2 is attached An annular member 6c to which the tip end portions 6a1 and 6b1 of the wire ropes 6a and 6b are connected and the one end portion 4a of the opening / closing operation rope 4 is fixed Since it is provided, the wire ropes 6a, 6b and the annular member 6c can easily fix the one end 4a of the opening / closing operation rope 4 to the proximity of the central portion of the second step L22 (ladder L).

According to the invention of claim 3 , the hook 7a to be locked to the twelfth step L212 (forceps L) close to the ground G and the opening and closing in the state where the hook 7a is locked to the twelfth step L212 (forceps L) Further, since the operation rope 4 is further provided with the tension portion 7b to be tensioned from the ground G, the opening and closing operation rope 4 can be easily tensioned from the ground G by the hook 7a and the tension portion 7b.

According to the invention of claim 4 , the rotary shaft 34 is mounted in the through hole L3 of the step L2 of the ladder L, and the lower clamp fixing member 36 is fixed to the projecting portion of the rotary shaft 34. However, when climbing the ladder L using the step L2 of the ladder L, the situation where the lower clamp fixing member 36 gets in the way can be reduced. In addition, by fixing the lower clamp fixing member 36 to the rotary shaft 34 instead of the tread L2, the lower clamp 3 can be rotated while the lower clamp fixing member 36 is firmly fixed. Furthermore, by mounting the rotary shaft 34 in the through hole L3 of the step L2, the through hole L3 provided in advance in the step L2 can be used, so the insertion hole is formed in the forceps L as in the prior art. There is no need, and the lower clamp 3 can be easily attached to the forceps L. Furthermore, since the lower clamp fixing member 36 is detachably fixed to the rotary shaft 34, the lower clamp 3 can be easily attached to the forceps L.

According to the invention of claim 5 , since the locking piece 23b for locking the tip E1 of the eaves point E when the upper clamp 2 clamps the eaves point E, the eaves point E of the upper clamp 2 is obtained by the locking pieces 23b. Dropout from the tip E1 can be reduced.

It is a front view which illustrates the use condition of the forceps fallover prevention device concerning one embodiment of the present invention. It is the perspective view seen from the front side which illustrates the use condition of the forceps fallover prevention device concerning the embodiment. It is the perspective view seen from the back side, illustrating the forceps fallover prevention device concerning the embodiment. It is the perspective view which illustrated the state which opened the lower clamp of the forceps fallover prevention device concerning the embodiment, and was seen from the back side and the right-hand side. It is the perspective view which illustrated the state which closed the lower clamp of the forceps fallover prevention device which concerns on the embodiment, and was seen from the back side and the right-hand side. It is a right side view which illustrates the state where the upper clamp of the ladder fall prevention device concerning the embodiment was made to contact a roof. It is a right side view which illustrates the state which is closing the lower clamp of the forceps fallover prevention device concerning the embodiment. It is a right side view which illustrates the state which closed the lower clamp of the forceps fallover prevention device concerning the embodiment, and was made to contact the eaves back.

  Hereinafter, an embodiment of a forceps overturn preventing device according to the present invention will be specifically described with reference to the drawings. In addition, in the following description, when showing the direction of the upper and lower sides and right and left, it shall mean the upper and lower sides and left and right when it sees from illustration front (Drawing 1, 2 and Drawing 6-Drawing 8). However, FIGS. 3-5 is the figure seen from the back side, Comprising: Left and right are reverse with respect to FIG. 1 and FIG. 2 which are the figures seen from the front side.

  As shown in FIG. 1 and FIG. 2 and FIG. 8, the forceps fallover prevention device 1 is attached to the forceps L and sandwiches the eaves tip E of the building B from the upper and lower sides to reduce the fall of the forceps L. is there. As shown in FIG. 1 and FIG. 2, this ladder L is a non-stretchable single continuous ladder having a constant overall length, and between the pair of left and right columns L1 extending in the vertical direction and the pair of columns L1. A through hole which is formed on a plurality of treads L2 (horizontal beams) horizontally arranged and spaced at predetermined intervals in the vertical direction and a plurality of treads L2 and which penetrates the inside of the treads L2 in the left and right direction L3 (see FIGS. 4 and 5). As shown in FIG. 1, the treads L2 are, in order from the top to the bottom, the first treads L21, the second treads L22, the third treads L23,..., And the twelfth treads L212. It is arranged as.

  On the other hand, the forceps fallover prevention device 1 is attached to the forceps L as shown in FIGS. 1 to 8, and clamps the upper clamp 2 and the lower clamp 3 which clamp the eaves tip E of the building B from the upper and lower sides. (See FIG. 1) The opening and closing operation rope 4 to be opened and closed from the opening and closing operation rope 4, the pulley 5 to which the opening and closing operation rope 4 is guided, the wire ropes 6a and 6b fixed to the second step L22, and the center of the second step L22 The end portions 6a1 and 6b1 (see FIG. 3) of the wire ropes 6a and 6b are connected to the proximity portion of the portion and the annular member 6c to which the one end 4a (see FIG. 3) of the opening / closing operation rope 4 is fixed The hook 7a (see FIG. 1) provided at the other end 4b (see FIG. 1) of the operation rope 4 and engaged with the twelfth step L212 approaching the ground G (see FIG. 1), and the hook 7a Opening and closing operation low when locked to tread L212 4 and tension unit 7b for tensioning from the ground G (see FIG. 1), and a.

  The upper clamp 2 is detachably attached to the insulator L as shown in FIGS. 1 to 8 and clamps the eaves point E of the building B from above as shown in FIGS. 1 and 2 and 6 to 8 As shown in FIG. 8, when the eaves point E is pinched, it contacts the roof R. As shown in FIG. 3, the upper clamp 2 is a pair of square pipes extending at the rear and obliquely downward with the base end 21 a disposed on both sides (outside of the pair of columns L 1) of the first step L 21. As shown in FIG. 4, the base end 22a is disposed on both sides of the second step L22 (outside of the pair of columns L1), and is formed of a square pipe extending diagonally upward on the rear side. The pair of second support arms 22, the tip end 21b of the first support arm 21 (see FIG. 4) and the tip end 22b of the second support arm 22 (see FIG. 4) can be pivoted to the front of the central portion, respectively. 1 fixed in (rotatable in the direction of arrow P1 shown in FIG. 4 with respect to the tip 21b of the first support arm 21 (see FIG. 4) as a base point) 1 of rectangular plate (see FIG. 3) extending in the longitudinal direction And a pair of upper holding portions 23. Further, as shown in FIG. 3, the upper clamp 2 is inserted so as to protrude on both sides of the through hole L3 of the first step L21, and the protruding portions on both sides have a pair of first support arms 21. A fixed shaft 24 composed of a cut-off bolt (long screw, full screw) to which the base end portion 21a is attached and which fixes the pair of first support arms 21 to the pair of columns L1 with a pair of thumb screws; As shown in FIG. 5, one end 25a (see FIGS. 4 and 5) is fixed to the proximal end 22a of the pair of second support arms 22 and the other end 25b is bent in the direction of the second step L22 It is fixed to a pair of mounting plate 25 which consists of a L-shaped bracket in the plane view which protrudes, and the front part (the other end 25b side) of a pair of mounting plate 25 and both ends (one pair) Of the first column L1) and detachably attach the second support arms 22 to the second step L22. A clamping member 26 on a pair consisting of a pipe clamp for fixing a has.

  By the way, as shown in FIGS. 3-8, the buffer member 23a which consists of a rectangular-plate-shaped rubber sheet which contacts the roof R is provided in the lower part of the upper holding part 23 when holding the eaves point E. As shown in FIG. Thereby, damage to the roof R which the upper clamping part 23 contacts by the buffer member 23a can be reduced.

  Further, as shown in FIG. 3 and FIG. 6 to FIG. 8, when the eaves point E is held by an L-shaped metal piece which is bent downward and protrudes at the front end portion of the upper holding portion 23. A locking piece 23b for locking the front end E1 of the eaves tip E is provided. Thereby, as shown in FIGS. 6-8, drop-off | omission of the eaves tip E of the upper clamp 2 from the front-end | tip part E1 can be reduced. As shown in FIGS. 4 and 5, a reinforcing plate 21c made of a rectangular metal plate so as to cover the side portion of the distal end portion 21b of the first support arm 21 and the side portion of the central portion of the upper sandwiching portion 23. Is fixed. Thereby, the connection part of the 1st support arm 21 and the upper clamping part 23 can be reinforced.

  On the other hand, the lower clamp 3 is detachably attached to the ladder L as shown in FIGS. 1 to 8 and sandwiches the eaves tip E of the building B from below, and as shown in FIG. Contact the back of the eaves (eaves) when sandwiching As shown in FIG. 3 and FIG. 4, the lower clamp 3 has a base end 31 a disposed on both sides (outside of the pair of columns L 1) of the third step L 23 and extends diagonally downward on the rear side and a tip end A pair of support arms 31 consisting of a pair of support arms 31 formed of a cylindrical pipe that is curved so that the rear side 31 b is slightly bent back and a pair of support arms 31 in front of a curved portion (see tip 31 b) of the pair of support arms 31 And a rectangular plate-shaped lower sandwiching portion 33 extending in the left-right direction so as to couple the pair of support arms 31 at the tip end portions 31b of the pair of support arms 31. The rotary shaft 34 made of a synthetic resin cylindrical pipe rotatably mounted so as to protrude on both sides of the through hole L3 of the third step L23, and one end of the base end portion 31a of the pair of support arms 31 The part 35a is fixed by a bolt etc. The end 35b is bent in the direction of the third step L23 and projected onto a pair of mounting plates 35 formed of an L-shaped bracket in plan view and on the front (the other end 35b side) of the pair of mounting plates 35 Both ends of the rotary shaft 34 (outside the pair of columns L1) which are fixed and project sidewardly from the through hole L3 of the third step L23 respectively are detachably held, and the pair of support arms 31 are arranged in the third step L23. And a pair of lower clamp fixing members 36 consisting of pipe clamps detachably fixed to the

  By the way, as shown in FIGS. 3-8, the buffer member 33a which consists of a rectangular-plate-shaped rubber sheet which contacts eaves back S when eaves-edge E is pinched is provided in the upper part of the lower clamping part 33. . Thereby, the damage of the eaves back S which the lower clamping part 33 contacts can be reduced. Note that, as shown in FIGS. 3 and 4, the suspension 32 is a hinge type support fitting in which a base end 32 a 1 is fixed to the central portion of the connecting portion 32 and a moving pulley 52 described later is fixed to the tip 32 a 2. A band 32a is provided.

  The open / close operation rope 4 is used to open / close the lower clamp 3 from the ground G as shown in FIG. 1, and as shown in FIG. 4, a rope 41 whose one end 41a is fixed to the annular member 6c; The carabiner 42 for locking the other end 41b of the rope 41 and the one end 43a (see FIGS. 4 and 5) are locked to the carabiner 42 as shown in FIG. 7b and a lashing belt 43 to which the hook 7a is attached. The rope 41 is a fiber rope made of synthetic fibers such as nylon (registered trademark), and is, for example, a rope-like rope used for parent ropes and the like. The carabiner 42 is a metal ring having an openable and closable gate, and detachably connects the rope 41 and the lashing belt 43. The lashing belt 43 is a polyester resin belt such as Tetron (registered trademark), and is, for example, a wide belt used for packing and the like.

  The pulley 5 is, as shown in FIG. 3, a side portion of the second step L22 (outside of the column L1 positioned on the left in FIG. 3), specifically, the proximal end 22a side of the second support arm 22. And a moving pulley 52 fixed to the central portion of the lower clamp 3 (connection portion 32) via a suspension band 32a. The fixed pulley 51 and the moving pulley 52 are bean blocks made of stainless steel, and are pulleys in which wheels (sheaves) for guiding the open / close operation rope 4 are accommodated inside the case. As shown in FIG. 3, in the opening / closing operation rope 4, one end 4a is fixed to the proximity of the central portion of the second step L22, and the other end 4b (see FIG. 1) is fixed to the moving pulley 52 and fixed. It is guided in the order of the pulleys 51 and extends downward toward the ground G.

  By the way, the fixed pulley 51 is a general pulley in which an axle (pin) is fixed at a predetermined position, and the axle is fixed at a position slightly below the side of the second tread L22. The extension direction of can be changed from the upper direction to the lower direction. The moving pulley 52 is a general pulley on which an axle moves, and along with the vertical movement of the opening / closing operation rope 4, the axle can move in the vertical direction (the moving pulley 52 can move in the vertical direction) It is supposed to be.

  Thus, when the other end 4b (see FIG. 1) of the opening / closing operation rope 4 arranged as described above is pulled (when the other end 4b (see FIG. 1) of the opening / closing operation rope 4 is moved downward) Since the one end 4a of the operation rope 4 is fixed to the annular member 6c (see FIG. 3), the lower clamp 3 to which the moving pulley 52 is fixed via the suspension band 32a can be lifted with half force. That is, as shown in FIG. 3, the annular member 6c to which the one end 4a of the opening / closing operation rope 4 is fixed, that is, the ladder L to which the annular member 6c and the wire ropes 6a and 6b are fixed serves as a fulcrum. The hanging band 32a to be fixed, that is, the lower clamp 3 to which the hanging band 32a is fixed is the action point, and the other end 4b (see FIG. 1) of the opening / closing operation rope 4 is the force point. The other end 4b of the open / close operation rope 4 serving as the power point shares the force for lifting the lower clamp 3 serving as the action point by half, so that the lower clamp 3 can be lifted with a half power. . In addition, as described above, the opening and closing operation rope 4 is fixed to the side of the second step L22 (fixed to the base end 22a side of the second support arm 22) by the fixed pulley 51. As it extends downward from the side portion of the crosspiece L22, when the worker climbs the ladder L using the step L2 of the ladder L, a situation in which the opening / closing operation rope 4 becomes an obstacle can be reduced.

  As shown in FIG. 3, the wire ropes 6a and 6b are formed by twisting hard steel wires, piano wires and the like, and are short ones in which loops are formed at both ends. In the wire ropes 6a and 6b, the base end portions 6a2 and 6b2 (see FIGS. 4 and 5) correspond to the upper clamp fixing member 26 and the support L1 at both ends (the inner side of the pair of support L1) of the second step L22. It winds around and is fixed to a crevice part, and tip part 6a1 and 6b1 (refer to Drawing 3) are connected with annular member 6c in the near part of the central part of the 2nd step cross L22. The annular member 6c is a joint fitting such as a shackle made of stainless steel, and is connected to the end portions 6a1 and 6b1 (see FIG. 3) of the wire ropes 6a and 6b, and one end 4a of the open / close operation rope 4 (see FIG. 3) is fixed. Thereby, the wire ropes 6a and 6b and the annular member 6c can easily fix the one end 4a of the open / close operation rope 4 to the proximity portion of the central portion of the second step L22.

  The hook 7a is a metal snap hook having a gate that can be opened and closed, as shown in FIG. 1, for locking the twelfth step L212 close to the ground G. The tensioning portion 7b tensions the opening / closing operation rope 4 from the ground G in a state where the hook 7a is locked to the twelfth step L212, and operates the ratchet handle or the ratchet wrench to tension the opening / closing operation rope 4 It is a ratchet buckle. Thus, the opening / closing operation rope 4 can be easily tensioned from the ground G by the hook 7a and the tensioning portion 7b. The tensioning portion 7b is not limited to the ratchet buckle, and may be, for example, a tensioning device used for clamping, a parent rope tensioner for tensioning the parent rope, or a non-ratchet It may be a tensor of a method.

  Here, the method of attaching the forceps fallover prevention apparatus 1 comprised as mentioned above to the forceps L, and the method of making the forceps fallover fall apparatus 1 into a use condition are demonstrated in detail.

  First, a method of attaching the forceps fallover prevention device 1 to the forceps L will be described. In order to attach the upper clamp 2 to the forceps L, as shown in FIG. 3, a pair of fixed shafts 24 are inserted through the through holes L3 of the first step L21, and the thumbscrews are loosened to form a pair of first support arms 21 is rotatably attached to the column L1. And as shown in FIG.4 and FIG.5, a pair of upper clamp fixing member 26 is clamped by the both ends (inside of a pair of support | pillars L1) of 2nd step-and-stand L22, A pair of 2nd support arms 22 It is attached to the step rail L22, and the pair of first support arms 21 is attached to the post L1 so as to be non-rotatable from being rotatable. As a result, the upper clamp 2 is attached to the forceps L. Thus, by inserting the fixed shaft 24 into the through hole L3 of the first step L21 as described above, it is not necessary to form a new insertion hole in the forceps L as in the prior art. Easy to attach to L Further, since the upper clamp fixing member 26 is detachably held at both end portions of the second step L22 (inside of the pair of columns L1), the upper clamp 2 can be easily attached to the forceps L.

  Next, in order to attach the lower clamp 3 to the forceps L, as shown in FIGS. 3 to 5, the rotary shaft 34 is mounted in the through hole L3 of the third step L23, and a pair of lower portions of the rotary shaft 34 protrudes. The clamp fixing member 36 is held. Thus, the support arm 31 can be rotatably attached to the through hole L3 of the third step L23, whereby the lower clamp 3 can be rotatably attached to the forceps L. Thus, as described above, when the rotary shaft 34 is attached to the through hole L3 of the third step L23 and the pair of lower clamp fixing members 36 is held by the projecting portion of the rotary shaft 34, the operator can When climbing up the ladder L using the step L2 of the ladder L, the situation where the pair of lower clamp fixing members 36 get in the way can be reduced. Further, by sandwiching the pair of lower clamp fixing members 36 on the rotary shaft 34 instead of the tread L2, the lower clamp 3 can be rotated while the pair of lower clamp fixing members 36 is firmly fixed. Furthermore, by mounting the rotary shaft 34 in the through hole L3 of the third step L23, the through hole L3 provided in advance in the third step L23 can be used, and therefore, insertion into the forceps L as in the prior art There is no need to form a hole, so that the lower clamp 3 can be easily attached to the forceps L. Furthermore, since the lower clamp fixing member 36 is detachably held by the rotating shaft 34, the lower clamp 3 can be easily attached to the forceps L.

  Then, as shown in FIGS. 4 and 5, the base ends 6a2 and 6b2 of the wire ropes 6a and 6b are fixed to the second step L22, and as shown in FIG. 3, the tip 6a1 of the wire ropes 6a and 6b. , 6b1 are connected to the annular member 6c.

  Next, as shown in FIGS. 3 to 5, one end 4a of the open / close operation rope 4 is fixed to the annular member 6c, and the other end 4b (see FIG. 1) of the open / close operation rope 4 The opening and closing operation rope 4 is extended downward as shown in FIG. As a result, the opening and closing operation rope 4 is attached to the forceps L and the lower clamp 3.

  Thus, in this way, the forceps fallover prevention device 1 is attached to the forceps L.

  Next, a method for putting the forceps fallover prevention device 1 in a use state will be described. First, as shown in FIGS. 1 and 6, the ladder L is erected on a building B in a state where the upper clamp 2, the lower clamp 3 and the opening / closing operation rope 4 are attached to the ladder L. At this time, as shown in FIG. 6, the upper clamping portion 23 of the upper clamp 2 is brought into contact with the roof R. Specifically, since the upper holding portion 23 is rotatable in the arrow P1 direction (see FIG. 4) as described above, when the ladder L is erected on the building B, the upper holding portion 23 is by its own weight. 23 will rotate. As a result, the upper clamping portion 23 of the upper clamp 2 comes into contact with the roof R.

  Next, as shown in FIG. 6, the other end 4b (see FIG. 1) of the open / close operation rope 4 is loosened, and the open / close operation rope 4 is moved upward (see the arrow P2 direction). As a result, the lower clamp 3 pivots (moves) downward (see the direction of the arrow P3) by its own weight, and the lower clamp 3 is in an open state.

  Then, as shown in FIG. 7 (also refer to FIG. 5), the other end 4b (see FIG. 1) of the open / close operation rope 4 is pulled to move the open / close operation rope 4 downward (refer to arrow P4). The lower clamp 3 is lifted by the tension of the operation rope 4 and pivoted in the direction of the arrow P5, and as shown in FIG. 8, the lower clamp 3 is closed, that is, the lower clamping portion 33 of the lower clamp 3 It will be in the state of touching. Thus, the lower clamp 3 can be opened and closed from the ground G by moving the other end 4b of the opening and closing operation rope 4 in the vertical direction in this manner, and as described above, the moving pulley 52 Since the lifting force of the lower clamp 3 can be halved by this, the opening and closing operation of the lower clamp 3 can be easily performed.

  Next, as shown in FIG. 8, after the eaves tip E is clamped by the upper clamp 2 and the lower clamp 3, as shown in FIG. 1, the hook 7a is locked from the ground G to the twelfth tread L212, and from the ground G The tensioning portion 7b is tensioned to tension the open / close operation rope 4.

  Thus, the hook 7a and the tensioning portion 7b keep the eaves tip E clamped by the upper clamp 2 and the lower clamp 3 so that the forceps fallover prevention device 1 can be put into use.

  Thus, according to the present embodiment described above, the forceps fallover prevention device 1 attaches the upper clamp 2 and the lower clamp 3 to the forceps L, and the upper clamp 2 and the lower clamp 3 of the forceps L Since the eaves tip E is held from above and below, it is possible to reduce the fall of the ladder L. Furthermore, since the open / close operation rope 4 for opening / closing the lower clamp 3 from the ground G is provided, there is no need to operate the open / close operation rod from the ground G while gripping the lifting rod with the ground G as in the conventional case. Opening and closing operations of the clamp 3 can be easily performed.

  In the present embodiment, the one end 4a of the opening / closing operation rope 4 is fixed to the vicinity of the central portion of the second step L22, and the moving pulley 52 is fixed to the central portion of the lower clamp 3. It may be fixed to the end other than the part. However, it is preferable to fix one end 4a of the opening / closing operation rope 4 in the vicinity of the central portion of the second step L22 and to fix the moving pulley 52 in the central portion of the lower clamp 3. By fixing to the central portion, the force is evenly distributed, so that the lower clamp 3 can be lifted in a stable state, so that the opening / closing operation of the lower clamp 3 can be easily performed.

  Moreover, in this embodiment, although one end part 4a was fixed to the lower clamp 3 and the example which opens and closes the lower clamp 3 from the ground G was shown in this embodiment, it is not limited to this, One end The part 4a is fixed to the upper clamp 2 and the upper clamp 2 is opened and closed from the ground G, and the one end 4a is fixed to the upper clamp 2 and the lower clamp 3 and the upper clamp 2 and the lower clamp 3 are opened and closed from the ground G It may be operated.

  Furthermore, although the example in which the one end 4a of the open / close operation rope 4 is fixed to the annular member 6c is shown in the present embodiment, the present invention is not limited to this. One end 4a of the wire rope 6 may be fixed to the tip 6a1, 6b1 of the wire ropes 6a, 6b. Furthermore, the wire ropes 6a and 6b may not be provided, and one end 4a of the opening / closing operation rope 4 may be fixed to the central portion of the second step L22. Alternatively, one wire rope 6a, 6b is formed, the base end of the one wire rope is fixed to the central portion of the second step L22, and the open / close operation rope is attached to the tip of the one wire rope The annular member 6c to which the one end 4a of 4 or the one end 4a of the opening / closing operation rope 4 is fixed may be fixed.

  And, in the present embodiment, a non-stretchable single continuous ladder having a constant overall length is exemplified as the ladder L to which the ladder overturn prevention device 1 is attached, but the present invention is not limited to this, and the overall length can be adjusted The forceps fallover prevention device 1 of the present invention can also be attached to a telescopic two-row forceps and a three-stroke forceps.

Reference Signs List 1 ladder fallover prevention device 2 upper clamp 3 lower clamp 4 opening and closing operation rope 4a one end 4b (of opening and closing operation rope) 4 other end 5 of the opening and closing operation rope 5 pulley 6a, 6b wire rope 6a1, 6b1 (of wire rope) Sections 6a2 and 6b2 (wire ropes) proximal end portion 6c Ring member 7a Hook 7b Tension portion 21 first support arm 21c reinforcing plate 22 second support arm 23 upper gripping portion 23a buffer member 23b locking piece 24 fixed shaft 25 mounting plate 26 upper clamp fixing member 31 support arm 32 connecting portion 32a suspension band 33 lower sandwiching portion 33a buffer member 34 rotating shaft 35 mounting plate 36 lower clamp fixing member 41 rope 42 carabiner 43 lashing belt 51 fixed pulley 52 moving pulley B building E E top E1 Tip part G ground L ladder L1 pillar L2 treads L21 first treads L22 first 2 trams L23 3rd tram L212 12th tram L3 through hole R roof S roof

Claims (5)

An upper clamp and a lower clamp that are attached to the ladder and clamp the eaves of the building from the top and bottom,
An open / close operation rope which has one end fixed to the upper clamp and / or the lower clamp and the other end opens and closes the upper clamp and / or the lower clamp from the ground ;
E Bei and a pulley which the opening and closing operation rope is guided,
The pulley includes a fixed pulley fixed to a side of the forceps to which the upper clamp is attached, and a moving pulley fixed to a central portion of the lower clamp.
The open / close operation rope is fixed at one end to the central portion of the ladder or in the vicinity thereof, and the other end is guided in the order of the movable pulley and the fixed pulley and extended downward toward the ground ladder fall prevention device made. The wire rope whose proximal end is fixed to the forceps to which the upper clamp is attached, and the tip of the wire rope is connected to the proximity of the central portion of the forceps to which the upper clamp is attached The forceps fallover prevention device according to claim 1 , further comprising an annular member to which one end of the rope is fixed. A hook provided at the other end of the opening / closing operation rope, which is engaged with the forceps close to the ground, and a tensioning portion for tightening the opening / closing operation rope from the ground in a state where the hook is engaged with the forceps; The forceps fallover prevention device according to claim 1 or 2, further comprising: The lower clamp is
A rotating shaft rotatably mounted in a through hole passing through the step of the ladder;
The forceps overturn preventing device according to any one of claims 1 to 3 , further comprising: a lower clamp fixing member detachably fixed to the rotary shaft protruding laterally from the through hole of the forceps. . The forceps fallover prevention device according to any one of claims 1 to 4 , wherein the upper clamp includes a locking piece for locking the tip of the eaves tip when the eaves tip is held.

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