JP2011256532A - Safety block attachment jig for movable ladder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safety block attachment jig for movable ladder, by which an operator can quickly ascend/descend and removal of the jig is very easy, while securing the safety of the operator descending via a movable or fixed ladder by properly installing a prescribed jig to the existing movable ladder.SOLUTION: An inventive safety block attachment jig for movable ladder, for attaching a safety block to a movable ladder connected to the upper part of a fixed ladder installed along one of various shafts, comprises a pair of latch bodies respectively fixed to the upper end parts of two vertical columns forming the movable ladder and a suspending bar for the safety block fixed between the pair of latch bodies. Each of the pair of latch bodies is formed of a mounting part abutted on the upper end part of the vertical column and a projecting piece laterally extended from the mounting part, and the suspending bar for the safety block is provided with a sliding prevention member for the safety block and is fixed to the front end side part of the projecting piece forming the latch body.

Description

  The present invention attaches a safety block to a movable ladder connected to an upper part of a fixed ladder installed in various vertical shafts such as a ventilation hole or a manhole provided in a facility where cables are laid underground. Therefore, the present invention relates to a safety block mounting jig for a movable ladder.

  For example, as shown in FIG. 9, a fixed ladder 101 or an upper portion of the fixed ladder 101 is provided in various vertical shafts 100 such as a ventilation hole and a manhole provided in a facility where cables are laid underground. There is a movable ladder 102 connected in series.

  Each of the fixed ladder 101 and the movable ladder 102 is composed of two vertical columns 103 and a plurality of horizontal rods 104 arranged at a predetermined interval between the vertical columns 103.

  The movable ladder 102 is configured to be slightly narrower than the fixed ladder 101 and is connected to the upper portion of the fixed ladder 101. As shown in FIG. 9, the movable ladder 102 moves upward from the position where the upper end of its own vertical column 103 is accommodated in the vertical shaft 100 along with the upper end of the vertical column 103 of the fixed ladder 101. The lid 105 is attached to the fixed ladder 101 so as to protrude from the vertical shaft 100.

  When the movable ladder 102 is not used, the upper end of the vertical column 103 of the movable ladder 102 moves to a position aligned with the upper end of the vertical column 103 of the fixed ladder 101 and is accommodated in the vertical shaft 100, and the lid 105 of the vertical shaft 100 is Is closed.

  When the worker S moves up and down via the fixed ladder 101 and the movable ladder 102 installed in the shaft 100, the worker S accidentally falls from the fixed ladder 101 and the movable ladder 102 by sliding his / her foot. There is a risk of doing so.

  Therefore, it is necessary to take measures to prevent the worker S from falling.

  As one countermeasure, for example, as shown in FIG. 10, two safety devices 107 may be attached to the safety belt 106 worn by the worker S.

  The safety device 107 includes a rope 108 housed in the device and a hook 109 attached to the tip of the rope 108. The rope 108 can be pulled out from the apparatus and pulled back into the apparatus.

  When the worker S moves up and down the movable ladder 102 using the safety device 107, for example, as shown in FIG. 10, the rope 108 is pulled out from each safety device 107 to a predetermined length, and the two hooks 109 are pulled out. The worker S raises and lowers the movable ladder 102 while securing the safety of the worker S while being hooked on the horizontal ridge 104 of the movable ladder 102.

  In addition, there is a vertical elevating ladder 200 with a safety belt as shown in Patent Document 1 for preventing the worker S from falling. As shown in FIG. 11 (a), the vertical elevating ladder 200 has a plurality of horizontal rods 202 arranged between two vertical columns 201. The supporting vertical column 201 is made of aluminum having a substantially I-shaped cross section. It consists of an alloy profile.

  Further, as shown in FIG. 11 (a), a safety belt 204 is attached to one of the vertical struts 201 via a safety device 203, and as shown in FIG. 11 (b), a hook-shaped hook at the other end is attached. The device 205 is hooked on the belt position or the like of the worker S who moves the ladder 200 up and down.

  The safety device 203 is vertically movable with the flange portion of the vertical column 201 having a substantially I-shaped cross section as a rail portion. However, when the worker S slides his / her foot, the safety device 203 faces downward due to the weight of the worker S. When the load is generated, the link mechanism of the safety device 203 works, the rail portion is sandwiched to prevent the safety device 203 from moving, and the worker S is prevented from falling.

  Further, there is a manhole ladder 300 as shown in Patent Document 2 for preventing the worker S from falling. As shown in FIG. 12A, the manhole ladder 300 is provided with a hook attachment rod 302 for a safety belt on a side surface of the ladder 300 via a stopper and connecting member 301.

  As shown in FIG. 12B, the hook attachment rod 302 is attached to the ladder via a plurality of stopper / connection members 301. For this reason, as shown in FIG. 12A, when the hook 303 on the worker S side is hooked on the hook mounting rod 302 via a predetermined rope, the hook 303 does not move even if the worker S falls from the ladder. Since the stopper combined member 301 is locked in the middle of the ladder, the worker S can be prevented from falling.

JP-A-9-209672 Utility Model Registration No. 3157590

  However, as shown in FIG. 10, the rope 108 is pulled out to a predetermined length from the safety device 107 worn by the worker S so that the two hooks 109 are stepped on the reed 104 of the movable ladder 102. In the fall prevention measure that secures the safety of the worker S by being hooked on the worker S, there is a problem that the worker S cannot quickly move up and down via the movable ladder 102 and the fixed ladder 101.

  Specifically, the operation of hooking the two hooks 109 on the side surface 104 of the movable ladder 102 so as to be stepped, and removing the two hooks 109 from the side surface 104 and again stepping to the other side surface 104 Since the operation of hooking must be continuously performed and the procedure becomes complicated, it takes time to move up and down through the movable ladder 102 and the fixed ladder 101.

  As a measure for eliminating such harmful effects, it is desired to install a safety block 400 on the upper portion of the movable ladder 102.

  The safety block 400 prevents the fall even when the worker S is going up and down through the movable ladder 102 and the fixed ladder 101 even if the worker S is about to fall by sliding his / her foot. This prevents accidents from occurring.

  For example, as shown in FIG. 13, the general safety block 400 includes a case main body 401 and a wire rope 402 drawn from the case main body 401.

  The wire rope 402 is wound around a predetermined drum accommodated in the case main body 401, and can be pulled out from the case main body 401 by rotation of the drum and pulled back into the case main body 401. .

  A hook 403 is attached to the distal end portion of the wire rope 402 to be hooked on the safety belt 106 worn by the worker S. A fixing ring 404 is attached to the upper portion of the case body 401.

  The safety block 400 is such that when the worker S moves up and down the movable ladder 102 and the fixed ladder 101 at a normal speed, the wire rope 402 is automatically pulled out from the case body 401 and is pulled back to the case body 401. Thus, the wire rope 402 does not get in the way when the worker S moves up and down.

  However, when the worker S falls from the movable ladder 102 or the fixed ladder 101 for some reason and the wire rope 402 is pulled out of the case body 401 vigorously, the case body 401 is, for example, the wire rope 402. When the wire rope 402 is pulled out by about 25 cm, the feeding of the wire rope 402 is stopped and the worker S operates to prevent the worker S from dropping further.

  As described above, the safety block 400 is very effective as a means for ensuring the safety of the worker S during lifting and lowering via the movable ladder 102 and the fixed ladder 101 while eliminating the conventional harmful effects. For example, as shown in FIG. 9, in a situation where the movable ladder 102 protrudes from the shaft 100 with the lid 105 opened, the safety block 400 is installed on the upper part of the movable ladder 102. The member does not exist.

  For this reason, when the movable ladder 102 or the fixed ladder 101 is used, a jig that is appropriately attached to the movable ladder 102 and suspends the safety block 400 on the movable ladder 102 is required.

  In addition to this, measures to prevent the worker S attaching the safety device 203 to one of the vertical columns 201 shown in FIGS. 11 (a) and 11 (b) and a stopper on the side surface of the ladder 300 shown in FIGS. 12 (a) and 12 (b). All of the measures for preventing the fall of the worker S provided with the hook attachment rod 302 for the safety belt through the combined connecting member 301 have a complicated structure, and the cost of the installation work is expensive.

  Therefore, it does not surpass measures for suspending the safety block 400 above the movable ladder 102.

  Furthermore, although these fall prevention measures are effective if taken from the beginning of construction, the existing movable ladder 102 and fixed ladder 101 require a large additional construction to newly install a special mechanism. turn into.

  Therefore, it is not preferable as a measure to be installed later on the existing movable ladder 102 and the fixed ladder 101.

  In addition, since a special mechanism is installed along the movable ladder 102 and the fixed ladder 101, it may not be installed in the first place with respect to the existing movable ladder 102 and the fixed ladder 101 in the narrow shaft 100.

  Therefore, the present invention was created in view of the existing circumstances as described above, and a movable ladder or a fixed ladder can be obtained by appropriately attaching a predetermined jig to an existing movable ladder and installing a safety block. A safety block mounting jig for a movable ladder is provided, which allows the worker to move up and down quickly while ensuring the safety of the worker when moving up and down, and the jig to be removed is extremely easy. The purpose is to do.

  The present invention is a safety block attachment jig for a movable ladder for attaching a safety block to a movable ladder connected to an upper part of a fixed ladder installed along various shafts, and forms the movable ladder. A pair of hanging bodies fixed to the upper end portions of the two vertical struts, and a safety block hanging rod fixed between the pair of hanging bodies. It is formed from a mounting part that hits the upper end of the column and a projecting piece that extends from the mounting part to the side. The problem mentioned above was solved by being fixed to the tip side part of the overhanging piece which forms the body.

  In addition, the mounting portion of the hanging body includes a rectangular hanging plate and a pair of holding pieces extending laterally from both end portions of the hanging plate, and the hanging plate is located next to the movable ladder. The above-mentioned problem was solved by having a notch groove for locking the hook from above.

  Furthermore, the mounting part of the latching body has solved the same problem as described above by fixing the top plate to the upper ends of the hanging plate and the pair of holding pieces.

  In addition, a predetermined through hole is provided in the two vertical struts that form the movable ladder, while a hole is provided in the pair of holding pieces that form the latching body, and the latching body is applied to the upper end portion of the vertical strut. However, in the state where the through hole of the vertical support and the hole of the clamping piece are matched, the shaft part of the bolt member is inserted and the nut is screwed to the tip side of the shaft part, thereby solving the same problem as described above. did.

  In addition, a hole is provided in the tip side of the overhanging piece that forms the latching body, while male screw parts are provided in both ends of the hanging rod of the safety block, and the safety block is suspended between the overhanging pieces. By hitting the rod, inserting the male thread part of the hanging rod into the hole of the overhanging piece, and holding the periphery of the hole of the overhanging piece with two nuts screwed into the male screw part The problem described above has also been solved.

  Moreover, the slide prevention member of the hanging rod of the safety block is formed of two ring plates that are fixed to the hanging rod while maintaining a predetermined distance, thereby solving the above-described problem.

  Furthermore, the anti-slide member is arranged at the substantially central part of the hanging rod of the safety block, and both side portions of the anti-sliding member on the hanging rod are handle parts that are held by the hand. Solved the problem mentioned above.

  The present invention is a safety block attachment jig for a movable ladder for attaching a safety block to a movable ladder connected to an upper part of a fixed ladder installed along various shafts, and forms the movable ladder. The movable ladder is made up of a vertical shaft because it is composed of a pair of suspension members fixed to the upper end portions of the two vertical struts, and a safety block suspension rod fixed between the pair of suspension members. When a movable ladder and a fixed ladder are used by protruding from a pair, a pair of hanging bodies are appropriately fixed to the two vertical struts forming the movable ladder, and a safety block is suspended between the pair of hanging bodies. Can easily fix the lower bar.

  And it becomes possible to install a safety block with respect to a movable ladder by suspending a safety block on the suspension rod of the safety block arrange | positioned between a pair of latching bodies.

  Therefore, by using this safety block, the worker can ascend and descend quickly through the movable ladder and the fixed ladder while ensuring his / her safety.

  Thus, by using the safety block mounting jig for the movable ladder according to the present invention, the safety block can be installed later on the movable ladder that is not provided with any measures to prevent the worker from falling. is there.

  Moreover, when various operations are completed and the movable ladder is accommodated in the shaft and the shaft is closed, the safety block can be removed and the hanging body and the hanging rod attached to the movable ladder can be easily removed.

  Furthermore, since the pair of latching bodies includes a mounting portion that hits the upper end portion of the vertical column, it can be easily attached to the vertical column. In addition, there is an overhanging piece that extends from the mounting part to the side, and the hanging rod of the safety block is fixed to the tip side of the overhanging piece. It can be placed at a position slightly away from the movable ladder.

  Therefore, the safety block attached to this hanging rod is also installed so as to project toward the center of the shaft.

  As a result, even if the wire rope is drawn out from the safety block for a long time, the wire rope is not caught on a fixed ladder or the like, and is not entangled with members existing on the inner wall of the shaft.

  In addition, since the safety block can be installed so as to protrude toward the center of the shaft, the wire rope of the safety block is placed on the shoulder or back side of the worker when the worker moves up and down via the movable ladder or the fixed ladder. Can be placed. Therefore, the worker can move up and down quickly without being aware of the presence of the wire rope.

  In particular, even when the worker is at the position of the movable ladder and the wire rope of the safety block is short, the wire rope can be placed on the shoulder or back side of the worker, so when the worker gets on the movable ladder, Even when leaving the movable ladder, the wire rope of the safety block does not get in the way.

  In addition, the safety block suspension rod is equipped with a safety block slide prevention member. By hanging the safety block on this slide prevention member, the safety block will not be displaced and will always be at the center of the shaft. The state where it is installed so as to overhang is maintained.

  Furthermore, the mounting portion of the latching body includes a rectangular hanging plate and a pair of clamping pieces extending from both end portions of the hanging plate to the side, so that the mounting portion is a vertical column. When the upper end of the vertical strut is hit, the front and rear side surfaces of the vertical strut can be sandwiched between the pair of sandwiching pieces in a state where the hanging plate is in contact with the inner side surface of the vertical strut.

  Since the mounting portion has a notch groove that is locked to the side of the movable ladder from above on the hanging plate, the mounting portion is vertically moved by hitting the notch groove on the side of the movable ladder. It does not move downward along the column.

  In addition, since the mounting part of the hanging body has a top plate fixed to the upper end of the hanging plate and the pair of holding pieces, when the mounting part hits the upper end of the vertical support, The vertical plate comes into contact with the inner side of the column, and the top plate comes into contact with the upper surface of the vertical column with the pair of clamping pieces sandwiching the front and rear sides of the vertical column. Will not move downward.

  In addition, the two vertical struts that form the movable ladder are provided with predetermined through holes, while the pair of holding pieces that form the latching body are provided with holes, and the latching body is attached to the upper end portion of the vertical strut. Since the through hole of the vertical support and the hole of the clamping piece are matched, the shaft part of the bolt member is inserted and the nut is screwed onto the tip side of the shaft part. The latching body can be securely fixed to.

  In this way, when the mounting part of the latching body is brought into contact with the upper end of the vertical column, with the hanging plate in contact with the inner side surface of the vertical column, the pair of clamping pieces The movement of the mounting part in the longitudinal direction is restricted by sandwiching the side surface of the mounting part, and the notch groove of the mounting part is supported from the bottom of the movable ladder, and similarly, the top plate of the mounting part is the top surface of the vertical column Therefore, the downward movement of the mounting portion is restricted.

  Then, with the through hole of the vertical strut and the hole of the clamping piece matched, by inserting the shaft part of the bolt member and screwing the nut to the tip side of the shaft part, front / rear / left / right / up / down of the mounting part The movement in the direction is restricted, and the latching body can be reliably fixed to the upper end portion of the vertical column.

  As a result, even if the worker falls from the movable ladder or the fixed ladder for some reason, and the worker is suspended by the wire rope of the safety block and a large load is applied to the safety block, the vertical strut Occurrence of the situation where the latching body comes off from the upper end portion of the door is surely prevented.

  And the safety of the worker at the time of raising / lowering through a ladder is ensured by supporting the weight of the worker firmly by the safety block and preventing its fall.

  In addition, a hole is provided in the tip side portion of the overhanging piece that forms the latching body, while male screw parts are provided in both end portions of the hanging rod of the safety block so that the safety block is suspended between the overhanging pieces. Because the male thread part of the hanging bar is inserted into the hole of the projecting piece and the nut is screwed into the male thread part, the periphery of the projecting hole is clamped The hanging rod of the safety block can be securely fixed to the hole of the overhanging piece.

  For this reason, even when a large load is applied to the safety block, the occurrence of a situation in which the hanging rod fixed between the pair of hooks is removed reliably is prevented.

  In addition, since the slide prevention member of the hanging rod of the safety block is formed by two ring plates that are fixed to the hanging rod while maintaining a predetermined distance, the safety block along the hanging rod is The movement in the left-right direction can be reliably controlled.

  In addition, the anti-slide member is located at the approximate center of the hanging rod of the safety block, and both sides of the anti-sliding member on the hanging rod are gripped by the operator. When a member gets on the movable ladder, he / she can secure his / her own safety by grasping the handle portion of the hanging rod with his / her hand. Also, when a worker who has climbed the movable ladder descends to the ground, he can quickly move away from the movable ladder while ensuring his own safety by grasping the handle part of the hanging rod with his hand and pulling up the body. be able to.

It is a perspective view which shows the use condition of the safety block mounting jig for movable ladders. It is a disassembled perspective view which shows the structure of a pair of latching body. It is a disassembled perspective view which shows the state which attaches the hanging stick of a safety block between a pair of latching bodies. It is a disassembled perspective view which shows the state which fixes a pair of latching body which has attached the suspension rod of a safety block to the upper end part of the two vertical support | pillars which form a movable ladder. It is a perspective view which shows the state which fixed the pair of latching body which has attached the suspension rod of the safety block to the upper end part of the two vertical support | pillars which form a movable ladder. It is a perspective view which shows the state which has suspended the safety block on the hanging rod attached to a pair of latching body. It is a perspective view which shows the other use condition of the safety block mounting jig for movable ladders. It is a disassembled perspective view which shows the other structure of the safety block attachment jig | tool for movable ladders. It is a perspective view which shows the state which opened the cover of a shaft and moved the movable ladder upward, and has made it protrude from a shaft. Attach two safety devices to the safety belt worn by the worker, pull out the rope to a predetermined length from each safety device, and hook the two hooks on the side of the movable ladder so as to be in a step. It is a perspective view which shows the state which is raising / lowering. The structure of the conventional vertical raising / lowering ladder is shown, (a) is a perspective view which shows the state which attached the safety belt to one of the two vertical support | pillars of a substantially I-shaped cross section via a safety device. b) is a side view showing a state in which the hook-like hooking device is hooked on the belt position of the worker and the worker is moving up and down. The structure of the conventional manhole ladder is shown, (a) is a perspective view showing a state in which a hook attachment rod for a safety belt is provided on the side surface of the ladder via a stopper and connecting member, and (b) is a hook attachment. It is a side view which shows the state in which the scissors are attached to the ladder via the some stopper combined connection member. It is a perspective view which shows the structure of a safety block.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated in detail with reference to drawings.

  As shown in FIGS. 1 and 6, the present invention is a movable ladder for attaching a safety block 400 to a movable ladder 102 connected to the upper part of a fixed ladder 101 installed along various shafts 100. This is a safety block mounting jig 1 for 102.

  In addition, since the structures of the shaft 100, the fixed ladder 101, the movable ladder 102, the safety block 400, and the like have already been described, the same components are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIGS. 2 to 4, the safety block mounting jig 1 for the movable ladder 102 includes a pair of hooks 2 fixed to the upper end portions of the two vertical struts 103 forming the movable ladder 102. The suspension bar 3 of the safety block 400 is fixed between the pair of hooks 2.

  As shown in FIGS. 2 and 4, the pair of hooks 2 includes a mounting portion 4 that hits the upper end portion of the vertical column 103, and a protruding piece 5 that extends from the mounting portion 4 toward the side. Formed from.

  Further, as shown in FIG. 2, the mounting portion 4 of the latching body 2 includes a rectangular hanging plate 6 and a pair of sandwiching pieces 7 extending from both ends of the hanging plate 6 toward the side. It has. The pair of sandwiching pieces 7 has a rectangular shape, and the entire mounting portion 4 is formed in a substantially U shape when viewed from above by the hanging plate 6 and the pair of sandwiching pieces 7.

  Furthermore, the hanging plate 6 has a notch groove 8 as shown in FIG. As shown in FIG. 4, the notch groove 8 is to be locked from above on the horizontal bar 104 located on the uppermost stage of the movable ladder 102, and the lower end side of the hanging plate 6 is opened, It is formed by cutting out in an inverted U shape so as to close in the middle of the plate 6.

  Further, as shown in FIG. 2, the mounting portion 4 of the latching body 2 has a rectangular top plate 9 fixed to the upper ends of the hanging plate 6 and the pair of sandwiching pieces 7.

  Since the mounting portion 4 hits the upper end portion of the vertical column 103, the hanging plate 6 has the same width as the inner side surface 103a of the vertical column 103, as shown in FIGS. . Similarly, the pair of sandwiching pieces 7 have the same width as the front and rear side surfaces 103 b and 103 c of the vertical column 103. The top plate 9 also has the same width as the upper surface 103 d of the vertical column 103.

  In addition, as shown in FIG. 2, predetermined holes 10 are provided in the lower portions of the pair of sandwiching pieces 7, respectively. Moreover, as shown in FIG. 4, the vertical support | pillar 103 is provided with the predetermined through-hole 103e.

  The holes 10 of the sandwiching pieces 7 and the through holes 103e of the vertical column 103 are arranged so as to match each other when the hooking body 2 is applied to the upper end portion of the vertical column 103.

  When fixing the retaining body 2, as shown in FIGS. 4 and 5, the retaining body 2 is applied to the upper end portion of the vertical column 103, and the through hole 103 e of the vertical column 103 and the hole 10 of the sandwiching piece 5 are disposed. The shaft part G of the bolt member B is inserted in a state in which these are matched. The shaft part G is provided with a male screw.

  And since the nut N is screwed to the front-end | tip of the axial part G inserted in the hole 10 of the clamping piece 5 and the through-hole 103e of the vertical support | pillar 103, the latching body 2 is fixed to the upper end part of the vertical support | pillar 103. Yes (see FIG. 5).

  In addition, as shown in FIG. 2, the protruding piece 5 is extended toward the side of one of the sandwiching pieces 7 (that abuts on the side surface 103 b of the vertical column 103) forming the mounting portion 4. . This overhanging piece 5 is arranged so as to maintain an angle of 90 degrees with respect to the sandwiching piece 7.

  Furthermore, a hole 11 is provided in the tip side portion of the overhanging piece 5. The hole 11 is for fixing the hanging rod 3 of the safety block 400 between the pair of hooks 2.

  As shown in FIG. 2, the projecting piece 5 is extended so that the upper edge thereof is horizontal. The lower edge of the overhanging piece 5 is slightly inclined upward from the base end side to the tip end side, and the tip end side of the overhanging piece 5 is slightly narrowed as a whole.

  The suspension bar 3 of the safety block 400 attached through the hole 11 of the overhanging piece 5 is formed so as to be slightly longer than the entire width of the movable ladder 102 (vertical column 103, horizontal rod 104, vertical column 103). Yes.

  As shown in FIG. 3, the hanging rod 3 is provided with male screw portions 12 at both end portions thereof. The male screw portion 12 includes two nuts N that are screwed into the male screw portion 12. Further, two washers W are arranged between the two nuts N.

  As shown in FIGS. 3 and 4, the suspension bar 3 of the safety block 400 is applied between the two overhanging pieces 5, and the male thread portion 12 of the hanging bar 3 is inserted into the hole 11 of the overhanging piece 5. The distal end side portion of the overhanging piece 5 that forms the latching body 2 by sandwiching the periphery of the hole 11 of the overhanging piece 5 with two nuts N that are inserted and screwed into the male screw portion 12 The hanging rod 3 is fixed to the frame.

  As shown in FIG. 3, the hanging rod 3 of the safety block 400 includes a slide prevention member 13 of the safety block 400. The anti-slide member 13 is formed by two ring plates 13a and 13b fixed to the hanging rod 3 while maintaining a predetermined interval.

  Further, the slide preventing member 13 is disposed at a substantially central portion of the hanging rod 3 of the safety block 400. Therefore, both side portions of the slide preventing member 13 in the hanging rod 3 are handle portions that the operator S grips with hands.

  Here, the movable ladder 102 to which the safety block attaching jig 1 is attached is preferably made of a stainless steel material so that sufficient strength can be secured. Further, each member of the safety block mounting jig 1 (a pair of protruding pieces 5, the hanging rod 3, the slide preventing member 13 and the like) is made of a material that forms the movable ladder 102 so as to prevent corrosion between different metals. It is preferable to use the same material. That is, it is most preferable to use each member of the stainless steel safety block mounting jig 1 for the stainless steel movable ladder 102.

  Hereinafter, a procedure for assembling the safety block mounting jig 1 for the movable ladder 102 to the upper end portions of the two vertical columns 103 forming the movable ladder 102 will be described.

  First, as shown in FIG. 3, the hanging rod 3 of the safety block 400 is put between the protruding pieces 5 of the pair of hooks 2, and the male screw of the hanging rod 3 is put into the hole 11 of the protruding piece 5. The portion 12 is inserted. At this time, the nut N is screwed to the proximal end portion side of the male screw portion 12, and the washer W is disposed.

  In this way, with the nut N and washer W arranged inside the overhanging piece 5, the distal end side of the male screw portion 12 of the hanging bar 3 is projected from the hole 11 of the overhanging piece 5.

  Next, as shown in FIGS. 3 and 4, a washer W is disposed on the distal end side of the male screw portion 12 and a nut N is screwed together. At this time, the two washers W are kept in a loose state where they do not hit the side surface of the overhanging piece 5 strongly.

  In this manner, as shown in FIG. 4, the hanging rod 3 of the safety block 400 is temporarily fixed between the overhanging pieces 5 of the pair of hooks 2.

  Next, as shown in FIGS. 4 and 5, the hook 2 is applied to the upper end portion of the vertical column 103, and the bolt 103 is aligned with the through hole 103 e of the vertical column 103 and the hole 10 of the holding piece 5. The shaft part G of the member B is inserted.

  Then, a nut N is screwed into the tip of the shaft portion G inserted into the hole 10 of the sandwiching piece 5 and the through hole 103e of the vertical column 103, and the latching body 2 is fixed to the upper end portion of the vertical column 103.

  At this time, the retaining body 2 is configured such that the front and rear side surfaces 103b and 103c of the vertical support column 103 are sandwiched between the pair of holding pieces 7 in a state where the suspended plate 6 is in contact with the inner side surface 103a of the vertical support column 103. The movement in the front-rear direction is restricted.

  Further, the cutout groove 8 of the mounting portion 4 is supported from below by a horizontal bar 104 positioned at the uppermost stage of the movable ladder 102, and similarly, the top plate 9 of the mounting portion 4 is formed on the upper surface 103 d of the vertical column 103. Supported from below, the downward movement of the mounting portion 4 is restricted.

  4 and 5, with the through hole 103e of the vertical support column 103 and the hole 10 of the sandwiching piece 7 matched, the shaft portion G of the member B is inserted so as to extend toward the distal end side of the shaft portion G. By screwing the nut N, the movement of the mounting portion 4 in the front-rear, left-right, and vertical directions is restricted, and the latching body 2 is securely fixed to the upper end portion of the vertical column 103.

  Next, the hanging rod 3 temporarily fixed between the overhanging pieces 5 of the pair of hooks 2 is securely fixed.

  Specifically, the two nuts N screwed into the male threaded portion 12 of the hanging rod 3 are tightened while finely adjusting the two nuts W around the hole 11 of the overhanging piece 5. , The periphery of the hole 11 of the overhanging piece 5 is sandwiched by two washers W, and the hanging rod 3 is fixed to the tip side portion of the overhanging piece 5 forming the hook 2. is there.

  Finally, as shown in FIG. 6, the safety block 400 is attached to the suspension bar 3 so as to be suspended.

  Specifically, the fixing ring 404 of the safety block 400 is hung on the slide prevention member 13 of the hanging rod 3, and the safety block 400 is formed between the two annular plates 13 a and 13 b forming the slide prevention member 13. The fixing ring 404 is attached.

  In this way, after attaching the safety block 400 to the movable ladder 102 via the safety block attachment jig 1 for the movable ladder 102, the worker S pulls the wire rope 402 from the case body 401 of the safety block 400. Pull out and hook the hook 403 of the wire rope 402 on the safety belt 106 worn by itself. This series of operations is performed on the ground.

  When the worker S gets on the movable ladder 102, he / she grips the handle portion of the hanging rod 3 which is both side portions of the slide preventing member 13 with his / her hand to ensure his / her safety. Also, when the worker S who has moved up the movable ladder 102 descends to the ground, he can move quickly while securing his own safety by holding the handle portion of the hanging rod 3 with his hand and lifting his body. Move away from the ladder 102.

  Further, when the worker S moves up and down via the movable ladder 102, the wire rope 402 of the safety block 400 is disposed on the shoulder or back side of the worker S as shown in FIG. It moves up and down without being aware of the presence of the wire rope 402.

  Furthermore, as shown in FIG. 7, the wire rope 402 does not get in the way when the wire rope 402 of the safety block 400 is pulled out long and the worker S moves up and down via the fixed ladder 101.

  Further, the wire rope 402 drawn out from the safety block 400 for a long time is not caught on a fixed ladder or the like and does not contact the inner wall of the shaft.

  The safety block mounting jig 1 for the movable ladder 102 is not limited to the shape shown in FIGS.

  For example, as shown in FIG. 8, a pair of protruding pieces 50 having a predetermined length are directly fixed to the outer side surface of the vertical column 103 forming the movable ladder 102, and the safety block mounting jig 1 May be configured.

  At this time, the suspension rod 30 having the slide preventing member 13 is fixed to the inner surface on the distal end side in the pair of overhanging pieces 50.

  A safety block mounting jig for a movable ladder according to the present invention, in various shafts where a movable ladder and a fixed ladder are installed, appropriately attaches the safety block to the movable ladder and secures its own safety by the safety block. Therefore, it can be widely used as a tool that allows an operator to move up and down quickly.

DESCRIPTION OF SYMBOLS S ... Worker B ... Bolt member W ... Washer 100 ... Vertical shaft 101 ... Fixed ladder 102 ... Movable ladder 103 ... Vertical support | pillar 103a ... Side surface 103b ... Side surface 103c ... Side surface 103d ... Upper surface 103e ... Through-hole 104 ... Lying side 105 ... Cover 106 ... Safety belt 107 ... Safety device 108 ... Rope 109 ... Hook 200 ... Vertical elevating ladder 201 ... Vertical strut 202 ... Bridge 203 ... Safety device 204 ... Safety belt 205 ... Hanging device 300 ... Manhole ladder 301 ... Combined with stopper Member 302 ... Hook mounting rod 303 ... Hook 400 ... Safety block 401 ... Case body 402 ... Wire rope 403 ... Hook 404 ... Fixing ring 1 ... Safety block mounting jig 2 ... Hanging body 3 ... Hanging rod 4 ... Mounting part 5 ... overhanging piece 6 ... hanging plate 7 ... clamping piece 8 ... notch groove 9 ... top plate 10 ... hole 11 Holes 12 ... male threaded portion 13 ... slide preventing member 13a ... ring plate 13b ... ring plate

Furthermore, the anti-slide member is arranged at the substantially central part of the hanging rod of the safety block, and both side portions of the anti-sliding member on the hanging rod are handle parts that are held by the hand. Solved the problem mentioned above.
In addition, the present invention is a safety block attachment jig for a movable ladder for attaching a safety block to a movable ladder connected to an upper part of a fixed ladder installed along various vertical shafts. Consists of a pair of overhanging pieces fixed directly to the upper end portions of the two vertical struts forming the ladder, and a safety block hanging rod fixed to the tip side portion of the pair of overhanging pieces. Since the bar is provided with a safety block slide prevention member, the problem described above has been solved.
Moreover, the slide prevention member of the hanging rod of the safety block is formed of two ring plates that are fixed to the hanging rod while maintaining a predetermined distance, thereby solving the above-described problem.
In addition, the slide prevention member is arranged at the substantially central portion of the hanging rod of the safety block, and both side portions of the sliding prevention member in the hanging rod are handle portions that are gripped by an operator, The problem mentioned above was also solved.

Claims (7)

It is a safety block mounting jig for a movable ladder for attaching a safety block to a movable ladder connected to the upper part of a fixed ladder installed along various shafts. It is composed of a pair of hooks fixed to the upper ends of the vertical columns, and a safety block hanging rod fixed between the pair of hooks,
The pair of latching bodies are formed of a mounting portion that hits the upper end portion of the vertical column, and a projecting piece that extends from the mounting portion toward the side,
The safety block suspension rod is provided with a safety block slide prevention member, and is fixed to the front end side portion of the overhanging piece forming the latching body. jig.   The mounting portion of the hanging body includes a rectangular hanging plate and a pair of holding pieces extending from both ends of the hanging plate to the side, and the hanging plate is placed on the side of the movable ladder. The safety block mounting jig for a movable ladder according to claim 1, further comprising a notch groove that is locked from above.   The safety block mounting jig for a movable ladder according to claim 1 or 2, wherein the mounting portion of the latching body has a top plate fixed to the upper ends of the hanging plate and the pair of holding pieces.   While providing a predetermined through hole in the two vertical struts forming the movable ladder, providing a hole in the pair of clamping pieces of the mounting part forming the latching body, hitting the latching body on the upper end portion of the vertical pillar, 4. The nut according to claim 1, wherein the through hole of the vertical support and the hole of the sandwiching piece are matched, and the shaft portion of the bolt member is inserted and the nut is screwed to the tip side of the shaft portion. Safety block mounting jig for movable ladder.   A hole is provided at the tip of the overhanging piece that forms the latching body, while male screw parts are provided at both ends of the hanging rod of the safety block, and the hanging rod of the safety block is placed between the overhanging pieces. 5. The male screw portion of the suspension rod is inserted into the hole of the overhanging piece, and the periphery of the hole of the overhanging piece is held by two nuts screwed into the male screw portion. A safety block mounting jig for the movable ladder according to any one of the above.   6. The movable ladder according to claim 1, wherein the sliding preventing member of the hanging rod of the safety block is formed by two ring plates fixed to the hanging rod while maintaining a predetermined interval. Safety block mounting jig.   7. The slide preventing member is disposed at a substantially central portion of the hanging rod of the safety block, and both side portions of the sliding preventing member of the hanging rod are handle portions held by an operator. A safety block mounting jig for a movable ladder according to any one of the above.

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