JP2011219991A - Slider and framework scaffold with slider - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an improved slider which may be joined with a safety rope and slides along a handrail, and an improved framework scaffold with the slider, preventing the slider from coming-off.SOLUTION: The slider comprises a slider body 1 which is slidably attached to a rod-shaped handrail member E2 erected between a pair of left and right support rods E1 and E1, and a coming-off preventing means for preventing the slider body 1 from coming-off from the handrail member E2. The slider body 1 has a tubular body 11 with an opening 10 extending along its longitudinal direction. The coming-off preventing means has an opening/closing member 2 which is joined with the safety rope F and thus closes the opening 10 by the load of a worker when the worker falls, and a lock member 3 which locks the opening/closing member 2 to keep the opening 10 in its closed state.

Description

  The present invention relates to a slider and a frame scaffold including the slider, and more particularly to an improvement in a lifeline moving slider attached to a handrail installed on the frame scaffold and coupled to a lifeline.

  In general, at a construction work or civil engineering work site, a framework scaffold is temporarily set up corresponding to a work position, and an operator walks or performs work using the framework scaffold.

  Therefore, in order to ensure the safety of the worker, a stationary or rearranged handrail is installed on the frame scaffold, and a lifeline is coupled to the frame scaffold, the handrail and the like.

  However, when the lifeline is directly coupled to the frame scaffold or the handrail, it is necessary to change the coupling position of the lifeline according to the movement of the worker, and the work is complicated.

  Therefore, as disclosed in Patent Document 1, the applicant provided a slider that slides along a handrail, and attempted to solve the above problem by connecting a lifeline to the slider.

  As shown in FIG. 9, the slider includes a cylindrical body 11 </ b> A that is open at the bottom and has an opening 10 </ b> A, and a ring bracket 12 </ b> A that is suspended from the cylindrical body 11 </ b> A and to which a lifeline is coupled.

  Further, the handrail to which the slider is attached includes a pair of left and right columns that stand in the longitudinal direction on the outer side of the scaffolding plate on which an operator works, and a bar-shaped handrail member that is laid between these columns.

  Then, the handrail member is inserted into the cylindrical body 11A of the slider, and the opening 10A is formed wider than the coupling portion between the support column and the handrail member.

  Therefore, the slider can be slid along the handrail member and transferred to the adjacent handrail member, and an operation for changing the connection position of the lifeline is unnecessary, and the lifeline does not hinder the movement of the operator.

JP 2007-1000049 A

  By providing the above-mentioned conventional slider, it is useful in that the lifeline coupling position can be slid along the handrail without releasing the lifeline coupling, but the following problems may be pointed out. is there.

  That is, when the operator falls from the scaffolding plate and is subjected to the load, the handrail to which the slider is attached is inclined and separated from the adjacent handrail under the impact of the operator dropping.

  At this time, when the slider is positioned at substantially the center of the handrail member, the handrail member bends in a V shape with the slider as a fulcrum to prevent the slider from moving.

  However, when the slider is positioned at the end of the handrail member and the end portion is not applied to the adjacent handrail member, the handrail member may be inclined and the end portion may be bent obliquely, and the slider may fall off the handrail member. There is.

  Therefore, in the conventional slider, it is necessary to form the cylindrical body so that the end of the cylindrical body covers the adjacent handrail member when the slider moves from the center of the handrail member.

  Accordingly, an object of the present invention is to provide a slider capable of preventing the slider from falling off without forming a long cylindrical body, and a frame scaffold provided with the slider.

  Means for solving the above problems include a slider body that is slidably attached to a bar-shaped handrail member installed between a pair of left and right columns, and a dropout prevention that prevents the slider body from falling off the handrail member. The slider body includes a cylindrical body having an opening along the longitudinal direction, and the drop-off prevention means is configured to open the opening with a load when the lifeline is coupled and the operator falls. A closing opening and closing member; and a locking member that locks the opening and closing member and maintains the opening in a closed state.

  According to the present invention, when the operator falls, the opening / closing member closes the opening of the cylindrical body with the load, so that the opening / closing member is caught on the support column, and the slider can be prevented from falling off the handrail member. .

  Therefore, it is not necessary to form a long cylindrical body, and the slider can be manufactured at low cost and light weight.

It is a rear view which shows partially a frame scaffold provided with the slider which concerns on one embodiment of this invention. It is a side view which shows partially a frame scaffold provided with the slider which concerns on one embodiment of this invention. It is a bottom view which expands and shows the slider which concerns on one embodiment of this invention. It is a front view which expands and shows the slider which concerns on one embodiment of this invention. It is a top view which expands and shows the slider which concerns on one embodiment of this invention. (A) It is XX sectional drawing which expands and shows the slider which concerns on one embodiment of this invention, and shows the state which the opening-and-closing member opened the opening of the cylindrical body.

(B) It is XX sectional drawing which expands and shows the slider which concerns on one embodiment of this invention, and shows the state which the opening-and-closing member closed the opening of the cylindrical body.
It is a perspective view which expands and shows the stopper of the frame scaffold provided with the slider which concerns on one embodiment of this invention. (A) It is a bottom view which expands and shows a part of slider which concerns on other embodiment of this invention, and shows the state which the opening-and-closing member opened the opening of the cylindrical body.

(B) It is a bottom view which expands and shows a part of slider which concerns on other embodiment of this invention, and shows the state which the opening-and-closing member closed the opening of the cylindrical body.
It is a bottom view which shows the conventional slider.

  Hereinafter, a slider showing an embodiment of the present invention will be described with reference to the drawings. The same reference numerals given throughout the several drawings indicate the same or corresponding parts.

  The slider according to the present embodiment is slidably attached to a handrail installed on a frame scaffolding to be built at a construction work or civil engineering work site, and one end side of the lifeline is coupled.

  As shown in FIGS. 1 and 2, the frame scaffold is composed of a plurality of scaffold units composed of a pair of left and right building frames B and B and a scaffold plate C constructed between the building frames B and B. The units are arranged side by side along the work object D such as a building, and then the scaffold units are sequentially stacked and assembled on the upper side.

  The building frame B of the scaffold unit is a pair of vertical members B1 and B1 arranged on the left and right in FIG. 2, and a horizontal member that is installed between the vertical members B1 and B1 and supports the scaffold plate C. B2.

  In order to prevent the operator from falling when the scaffold unit is assembled to the frame scaffold, the vertical scaffold B1 of the lower scaffold unit is used before assembling the upper scaffold unit. A handrail 1 is attached.

  The handrail E includes a pair of left and right columns E1 and E1 and a bar-shaped handrail member E2 installed between the columns E1 and E1, and the columns E1 and E1 are opposite to the scaffold unit. It is respectively fixed to the vertical members B1 and B1 arranged on the work object side, that is, the outer side on the left and right.

  In the following description, the work object D side to be described will be the inward side and the opposite work object side will be the outer side.

  In addition, since the handrail E that can be attached in advance to the scaffold unit has been proposed and variously proposed as a handrail, the detailed structure of the handrail is described in Patent Document 1 and the like. Refer to it.

  The slider A1 according to the present embodiment is a lifeline moving slider to which the lifeline F is coupled via the hook F1, and is attached to the handrail E attached prior to the scaffold unit. Ensuring safety when assembling the upper scaffolding unit with E.

  As shown in FIG. 3, the slider A1 includes a slider body 1 that is slidably attached to a bar-shaped handrail member E2 installed between a pair of left and right columns E1 and E1, and the slider body 1 is the handrail member. Drop-off prevention means for preventing the drop-off from E2.

  The slider body 1 includes a cylindrical body 11 having an opening 10 along the longitudinal direction.

  In addition, the drop-off prevention means includes an opening / closing member 2 that opens and closes the opening 10 with the load when the lifeline F is coupled and the operator falls, and the opening / closing member 2 is locked to close the opening 10. A locking member 3 to be maintained.

  Below, each component of slider A1 which concerns on this Embodiment is demonstrated in detail.

  As shown in FIGS. 3 to 5, the slider body 1 slidably attached to the rod-like handrail member E <b> 2 includes a tubular body 11 through which the handrail member E <b> 2 is inserted, and an upper surface of the tubular body 11. 11 a and a plurality of rollers 12 provided on the side surfaces 11 b and 11 c and a pair of inclined guides 13 and 13 provided at both ends of the cylindrical body 11.

  The cylindrical body 11 is formed by bending a long plate-shaped member along the longitudinal direction so as to have a substantially rectangular cross section, and the opening 10 formed at the joint portion of the long sides facing each other is the cylindrical body. Arranged on the lower surface 11d.

  Further, the opening 10 is formed wider than the joint E3 (FIG. 3) between the column E1 and the handrail member E2 in the handrail, and the slider A1 is not caught on the column E1 by including the configuration. It becomes possible to transfer to the adjacent handrail member E2.

  Three rollers 12 provided on the cylindrical body 11 are provided on the upper surface 11a of the cylindrical body 11 and two rollers 12 are provided on the inner and outer side surfaces 11b and 11c. Each roller 12 contacts the outer periphery of the handrail member E2. Since it rotates while contacting, the slider A1 slides smoothly along the handrail member E2.

  A pair of inclined guides 13 provided at both ends of the cylindrical body 11 is composed of a pair of inner and outer inclined pieces 13a and 13b, and the inclined pieces 13a and 13b are formed on both side surfaces 11b of the cylindrical body 11, respectively. The base end portion is coupled to the end portion of 11c and the tip end is inclined while being separated.

  That is, as shown in FIG. 3, since the inclined guide 13 is enlarged in diameter toward the tip, for example, even if the handrail member E2 to which the slider A1 is attached and the adjacent handrail member E2 are displaced, The adjacent handrail member E2 can be guided into the cylindrical body 11 by the inclined guide 13.

  The configuration of the slider body 1 is not limited to that shown in the drawing, and the configuration can be selected as appropriate.

  For example, the cross-sectional shape of the cylindrical body 11 may be a circle having the opening 10, and may be other cross-sectional shapes.

  Moreover, the quantity of the said roller 12 and the position which attaches the roller 12 can be selected suitably.

  Although not shown, the inclined guide 13 may be formed in a skirt shape whose diameter increases toward the tip side.

  The fall prevention means for preventing the slider body 1 from falling off the handrail member E2 closes the opening 10 of the cylindrical body 11 with the load when the lifeline F is coupled via the hook F1 and the operator falls. An opening / closing member 2 and a lock member 3 that locks the opening / closing member 2 and maintains the opening 10 in a closed state are provided.

  The opening / closing member 2 slides perpendicularly to the axis of the cylindrical body 11, and as shown in FIG. 6, an upper piece 20 that is in sliding contact with the upper surface 11 a of the cylindrical body 11 and a lower surface of the cylindrical main body 11. The lower piece 21 is in sliding contact with 11d, and the upper piece 20 and a connecting piece 22 that connects one end side of the lower piece 21 are formed in a U-shaped cross section.

  The upper piece 20 is a flat plate member provided with a long hole 20a (FIG. 5) opened in the center. By providing the long hole 20a, the roller 12 provided on the cylindrical body 11 is avoided to prevent the upper piece 20 from falling. Means can be attached.

  The connecting piece 22 is suspended from one end side (the outer side in the present embodiment) of the upper piece 20 and has a through hole 22a through which a pin 30 described below is inserted. It is the flat member provided.

  The lower piece 21 is suspended from the lower end of the connecting piece 22 and is disposed opposite to the upper piece 22.

  The opening / closing member 2 has the slider body 1 inserted into an opening formed on the other end side (inward side in the present embodiment) of the upper piece 20 and the lower piece 21, and the lower piece 21. Then, the opening 10 of the cylindrical body 11 is opened and closed.

  In the present embodiment, the lifeline F is coupled to the inner side of the upper piece 20 and the connecting piece 22 is disposed on the outer side by connecting the outer sides of the upper piece 20 and the lower piece 21. Therefore, the slider A1 can close the opening 10 of the cylindrical body 11 by sliding the opening / closing member 2 when the operator falls into the gap between the work object D and the frame scaffold.

  Note that opening the opening 10 of the cylindrical body 11 means that the slider A1 can pass through the joint E3 between the column E1 and the handrail member E2 by opening a part or all of the opening 10. Is.

  On the other hand, closing the opening 10 of the cylindrical body 11 means that the slider A1 cannot pass through the joint E3 between the support E1 and the handrail member E2 by closing a part or all of the opening 10. Is what you say.

  That is, by closing the opening 10 of the cylindrical body 11 with the opening / closing member 2, it is possible to prevent the slider A1 from moving on the handrail member E2 outside the left and right columns E1, E1.

  Further, when the slider A1 moves outward from the left and right columns E1 and E1, the cylindrical body 11 is always formed so that the end portion of the cylindrical body 11 is applied to the adjacent handrail member E2, thereby the slider A1. It is possible to reliably prevent the falling out of the.

  Therefore, the cylindrical body 11 can be formed shorter than the conventional slider, and the slider A1 can be manufactured at low cost and light weight.

  Further, the shape of the opening / closing member 2 is not limited to the above, and although not shown, it is possible to select an appropriate shape such as a curved U-shaped cross section of the connecting piece 22.

  In addition, the opening / closing direction of the opening / closing member 2 can be selected as appropriate. For example, as shown in other embodiments described later, the opening / closing member 200 is rotated to open / close the opening 10 of the cylindrical body 11. You may do that.

  Although not shown, when the opening / closing member 2 is formed with notches that engage with the column E1 and the opening / closing member 2 closes the opening 10 of the cylindrical body 11, the slider A1 slides. And the support E1 may be engaged.

  The opening / closing member 2 is urged in the direction to open the opening 10 of the cylindrical body 11 by the open side maintaining means 4, and this open side maintaining means 4 is connected to one side of the cylindrical body 11 (this embodiment). A pin 40 suspended from the side surface 11c on the outer side), an insertion hole 22a that is opened through the connecting piece 22 of the opening / closing member 2 and passes through the pin 40, and one side of the cylindrical body 11 And an open-side biasing spring 41 interposed between the side surface 11c and the connecting piece 22.

  By providing the above configuration, the open side maintaining means 4 urges the connecting piece 22 outward by the biasing force of the open biasing spring 41 and opens the opening 10 of the cylindrical body 11. Can be maintained.

  Therefore, even if the lifeline F is pulled by the movement of the operator, the open side maintaining means 4 prevents the opening / closing member 2 from closing the opening 10 of the cylindrical body 11, and the opening / closing member 2 is moved to the slider A1. To prevent obstruction of the slide.

  That is, as long as the operator does not fall from the scaffold plate C, the opening 10 of the cylindrical body 11 can be maintained in the open state by the open side maintaining means 4.

  Further, the tip of the pin 40 penetrates the insertion hole 22a and protrudes to the outer side of the connecting piece 22, and a nut 42 is screwed to the tip. The outer diameter of the nut 42 is the insertion diameter. It is formed larger in diameter than the inner diameter of the hole 22a.

  Therefore, the tip end portion of the pin 40 does not come out of the insertion hole 22a, and the opening / closing member 2 can be prevented from falling off the slider body 1 by the biasing force of the opening-side biasing spring 41.

  The configuration of the open side maintaining means 4 can be selected as appropriate. For example, although not shown, the pin 40 is broken when the operator falls and a load is applied to the lifeline F. The opening may be opened.

  A guide 5 having a substantially L-shaped cross section is coupled to the inner lower surface of the upper piece 20 of the opening / closing member 2, and the guide 5 includes a horizontal piece 50 coupled along the upper piece 20, and It consists of a vertical piece 51 suspended downward from the end of the horizontal piece 50.

  As shown in FIG. 6A, the vertical piece 51 abuts on the inner side surface 11b of the cylindrical body 11 when the opening and closing member 2 opens the opening 10 of the cylindrical body 11. A hook piece (not blinded) that bends toward the cylindrical body along the tip is provided.

  By providing the guide 5, the slider A1 according to the present embodiment prevents the opening / closing member 2 from rattling with respect to the cylindrical body 11 when the cylindrical body 11 slides along the handrail member E2. It becomes possible.

  The configuration of the guide 5 is not limited to the above, and although not shown, the guide 5 may be composed only of the hanging piece 51 that is directly fixed to the upper piece 20 of the opening / closing member, and the configuration may be selected as appropriate. Is possible.

  The lock member 3 that maintains the opening / closing portion 2 in a state in which the opening 10 of the cylindrical body 11 is closed (FIG. 6B) is formed on the lock pin 30 that intersects the pin 40 and the opening / closing member 2. And a locking hole 20b with which the tip of the lock pin 30 engages, and a lock spring 31 that urges the lock pin 30 toward the locking hole 20b.

  The lock pin 30 is held by a pair of holding pieces 32, 32 that stand opposite to the outer side surface 11 c of the cylindrical body 11, and is directed from the lower piece 21 to the upper piece 20 of the opening / closing member 2. The pins 40 are arranged so as to intersect perpendicularly.

  The locking hole 20b is opened to the outer side of the upper piece 20, and the opening / closing member 2 slides to close the opening 10 of the cylindrical body 11 as shown in FIG. 6 (b). At the position facing the tip of the lock pin 30.

  The lock spring 31 is interposed between an upper holding piece 32 in FIG. 6 and a locking pin (not shown) penetrating the lock pin 31 in the radial direction. Energize upward.

  By providing the above configuration, the lock member 3 is configured such that when the opening / closing member 2 slides to close the opening 10 of the cylindrical body 11, the tip of the lock pin 30 and the locking hole 20b face each other, and the lock spring 3 The lock pin 30 moves upward in FIG. 6 according to the urging force of 31, and the tip of the lock pin 30 is inserted into the locking hole 20b.

  Accordingly, since the opening / closing member 2 is locked in a state in which the opening 10 of the cylindrical body 11 is closed by the lock member 3, the lifeline F is extended when the operator falls, and the operator rebounds and the lifeline F Even if the load applied to is eliminated, the opening 10 of the cylindrical body 11 does not open and the slider A1 does not fall out of the handrail.

  Further, a ring (not shown) is provided at the base end of the lock pin 30, and the lock pin 30 is pulled out of the locking hole 20b by pulling the ring, so that it can be opened / closed by the biasing force of the open biasing spring 41. The member 2 slides and the opening 10 of the cylindrical body 11 can be opened again.

  The lock pin 30 is inserted through a long hole 21a formed in the lower piece 21 of the opening / closing member 2, and the lock pin 30 and the opening / closing member 2 move relative to each other by providing the long hole 21a. It becomes possible.

  In the present embodiment, the lock pin 30 is inserted from the lower piece 21 toward the upper piece 20 as described above. However, the present invention is not limited to this. Alternatively, the pair of left and right side pieces may be provided on both sides of the upper piece 20 and inserted from one side piece toward the other side piece.

  In addition, by providing the assembly hole 20c in the upper piece 20 of the opening / closing member 2, the lock member 3 can be easily assembled from the assembly hole 20c. Of course, it may be assembled.

  By the way, the frame scaffold to which the slider A1 according to the present embodiment is attached is at the end of the handrail member E2 of the scaffold unit arranged on both sides among the plurality of scaffold units arranged along the work object D. A stopper member 6 is provided.

  As shown in FIG. 7, the stopper member 6 includes a stopper body 60 having a substantially U-shaped cross section and a flange 61 that fixes the stopper body 60 to the handrail member E <b> 2. The slider A <b> 1 holds the stopper member 6. Stop moving beyond.

  The stopper body 60 is suspended from a stopper upper piece 62 that contacts the upper surface of the handrail member E2, a stopper hanging piece 63 suspended from the end of the stopper upper piece 62, and the stopper hanging piece 63. The stopper upper piece 62 is opposed to the stopper lower piece 64.

  The stopper upper piece 62 and the stopper lower piece 64 are provided with two pairs of connecting holes 65 which are opposed to each other.

  Further, the stopper lower piece 64 is provided with a notch 64a between the connecting holes 65, 65. By providing the notch 64a, the stopper member 6 can be attached to the handrail member E2 while avoiding the support column E1. It becomes possible.

  On the other hand, the collar 61 is composed of a bar-shaped bar 66 and a pair of legs 67 and 67 suspended from both ends of the bar 66, and is formed in a U-shape.

  And the said collar 61 fixes the said stopper main body 60 to the said handrail member E2 by inserting each leg 67, 67 into the said connection hole 65, respectively.

  Further, a pin 68 is inserted in the distal end portion of one leg 67 in the radial direction. By providing the pin 68, the hook 61 is prevented from being completely removed from the stopper member 60, and the stopper member 60 and It is possible to prevent the ridge 61 from being disassembled.

  Although the hook 61 has the above-described configuration, the stopper member 60 can be easily attached and detached. However, although not shown, the nut is screwed onto the tip of the leg 67 to handrail the stopper member 6. It may be attached to the part E2.

  Moreover, the stopper member 6 does not slide on the handrail member E2 by being caught by the support column E1 by providing the above configuration, and the slider A1 can be prevented from moving before the stopper member 6. It becomes.

  The configuration of the stopper member 6 is not limited to the above, and the configuration can be appropriately selected as long as the movement of the slider A1 can be prevented even when the opening 10 of the cylindrical body 11 is open. is there.

  Next, the operation of the slider A1 according to the present embodiment will be described.

  The slider A1 is connected to an operator via a lifeline F, and is slidably attached to the handrail E by inserting a handrail member B2 into the cylindrical body 11 of the slider body 1.

  Further, by providing the opening 10 formed on the lower surface of the cylindrical body 11, the slider A1 moves to the adjacent handrail member E2 while avoiding the joint portion E3 between the handrail member E2 and the column E1.

  Therefore, when the operator moves to the adjacent scaffold unit, the slider A1 can also move to the handrail E attached to the adjacent scaffold unit, and the lifeline F is prevented from hindering the movement of the operator.

  And when an operator falls from the scaffolding board C, an operator is suspended by the lifeline F, the load acts on the opening / closing member 2 via the lifeline F, and the opening / closing member 2 is shown in FIG. Pulled to the left.

  As a result, the opening / closing member 2 moves to the left in FIG. 6A against the biasing force of the open biasing spring 41 and closes the opening 10 of the cylindrical body 11.

  At this time, when the slider A1 slides along the handrail member E2, the lower piece 21 of the opening / closing member 2 comes into contact with the column E1, so that the slider A1 does not fall off the handrail E.

  Moreover, since the length of the cylinder 11 is set so as to be applied to the adjacent handrail member E2 even if the slider A1 is positioned outside the support column E1 as described above, the handrail member when the operator falls. The handrail member 2 adjacent to E2 bends simultaneously.

  That is, since both ends of the handrails E2 and E2 are connected via the cylindrical body 11, the both handrail members E2 and E2 are not separated from each other, and the slider A1 falls off the handrail member E2. There is no.

  When the opening / closing member 2 closes the opening 10 of the cylindrical body 11, the lock pin 30 is inserted into the locking hole 20 b by the urging force of the lock spring 31 to lock the opening / closing member 2.

  Thereby, even when the operator rebounds and no load is applied to the opening / closing member 2, the opening / closing member 2 maintains the opening 10 of the cylindrical body 11 closed, and the slider A1 falls off the handrail E. Can be prevented.

  Next, a slider A2 showing another embodiment of the present invention will be described with reference to the drawings. The slider A2 in the present embodiment is a modification of the drop-off preventing means in the slider A1 showing the one embodiment.

  Therefore, the configuration other than the drop-off preventing means is the same as that of the above-described embodiment, and detailed description thereof is omitted here with reference to the above-described embodiment.

  FIG. 8 is a partially enlarged bottom view showing the slider A2 in the present embodiment, with the upper side in FIG. 8 being the outer side and the lower side being the inner side.

  Similarly to the embodiment, the drop-off preventing means according to the present embodiment is connected to the lifeline F and when the operator falls, the opening / closing member 200 that opens and closes the opening 10 of the cylindrical body 11 with the load, and the opening / closing member 200 A locking member 300 that locks the member 200 and maintains the opening 10 in a closed state.

  The opening / closing member 200 is extended inward from the upper piece 201 extending inward from the end of the upper surface 11 a of the cylindrical body 11 and the end of the lower surface 11 d of the inner side of the cylindrical body 11. A pair of left and right lower pieces 202, 202, a movable piece 203 supported by these lower pieces 202, 202 and having a hole 203a to which the lifeline F is coupled, and a pair of left and right open / close pieces rotatably attached to the movable piece 203 204, 204.

  The open / close pieces 204, 204 are rotatably held at the tips of pins P, P suspended from the lower pieces 202, 202, respectively, and an insertion hole 204a through which the pin P is inserted has a long hole shape. Formed.

  By providing the above configuration, when the operator falls and the load acts on the movable piece 203, as shown in FIG. 8B, the open / close pieces 204, 204 rotate and the movable piece 203 is rotated. Is moved inward, and the opening 10 of the cylindrical body 11 can be closed by the tips of the opening and closing pieces 204, 204.

  Therefore, the opening / closing member 200 can prevent the slider A2 from moving on the handrail member E2 outside the left and right columns E1, E1 by closing the opening 10 of the cylindrical body 11.

  The locking member 300 for maintaining the opening member 200 in a state in which the opening 10 of the cylindrical body 11 is closed is similar to the locking member 3 of the above-described embodiment, and includes the lock pin 301 and the upper piece 201 of the opening / closing member 200. And a lock spring (not shown) that urges the lock pin 301 toward the lock hole 302.

  The locking hole 302 is formed on the inner side of the upper piece 201. When the opening / closing member 2 closes the opening 10 of the cylindrical body 11, as shown in FIG. It is provided at a position facing the tip of the lock pin 301.

  With the above configuration, when the opening / closing member 200 closes the opening 10 of the cylindrical body 11, the lock member 300 is inserted into the locking hole 302 according to the urging force of the lock spring, and the opening / closing member 200. However, it is possible to keep the opening 10 of the cylindrical body 11 locked.

  Although FIG. 8 does not show an open side maintaining means for the opening / closing member 200 to keep the opening 10 of the cylindrical body 11 open, it is preferable to provide an open side maintaining means as appropriate.

  For example, the open side maintaining means is made of an elastic member such as a spring interposed between a pair of opening and closing pieces 204 and 204, and the distance between the base ends of the opening and closing pieces 204 and 204 is minimized by this elastic member. It may be energized.

  When the opening 10 of the cylindrical body 11 can be maintained in an open state by the frictional force between the tip of the lock pin 301 and the upper piece 201, a specific example of the opening side maintaining means is specifically described. There is no need to provide a special configuration.

  Next, the action of the drop-off preventing means in the slider A2 according to the present embodiment will be described.

  When the worker falls from the scaffolding plate C, the worker is suspended from the lifeline F, and the load acts on the opening / closing member 200 via the lifeline so that the opening / closing member 200 is inward, that is, FIG. Pulled to the middle lower side.

  Thereby, as shown in FIG.8 (b), both the opening-and-closing pieces 204 and 204 of the opening-and-closing member 200 rotate, and the opening 10 of the cylindrical body 11 is closed by the front-end | tip part.

  When the slider A2 slides along the handrail member E2 in this state, the opening / closing piece 204 abuts on the support column E1, so that the slider A2 does not fall off the handrail E.

  When the opening / closing member 200 closes the opening 10 of the cylindrical body 11, the lock pin 301 is inserted through the locking hole 302 by the urging force of a lock spring (not shown) to lock the opening / closing member 200.

  As a result, even when the operator rebounds and no load is applied to the opening / closing member 200, the opening / closing member 200 keeps the opening 10 of the cylindrical body 11 closed and the slider A2 falls off the handrail E. Can be prevented.

  While the preferred embodiment of the present invention has been described above, it should be understood that modifications, variations and changes may be made without departing from the scope of the claims.

  For example, in each of the above-described embodiments, the slider is attached to the preceding handrail installed on the frame scaffold, but this is not restrictive, and the slider of the present invention may be attached to a stationary or rearranged handrail. Of course.

  In each of the above embodiments, the slider prevents the slider from falling off when the operator falls between the scaffolding plate and the work object, that is, the inward side of the scaffolding plate. The direction in which the drop-off prevention means is attached may be changed.

  In other words, although not shown, it is possible to prevent the slider from falling off when falling to the outside of the scaffolding plate by attaching it to the slider body with the inner side and the outer side of the dropout prevention means reversed. Become.

  Although not shown in the drawing, by attaching two drop-off prevention means to the slider body and making one of the drop-off prevention means opposite to the other drop-off prevention means in the same manner as in the above embodiment, The slider can be prevented from falling off even if it falls on either the outer side or the outer side.

A1, A2 Slider B Building frame B1 Vertical member B2 Horizontal member C Scaffolding plate D Work object E Handrail E1 Post E2 Handrail member F Lifeline F1 Hook 1 Slider body 2, 200 Open / close member 3, 300 Lock member 4 Open side Maintenance means 5 Guide 6 Stopper member 10 Opening 11 Tubular body 12 Roller 13 Inclination guide 20, 201 Upper piece 21, 202 Lower piece 22 Connection piece 30, 301 Lock pin 31 Lock spring 40 Pin 41 Opening side biasing means 50 Horizontal piece 51 Vertical piece 60 Stopper body 61 閂

Claims (6)

A slider main body slidably attached to a bar-shaped handrail member installed between a pair of left and right support columns, and a drop-off prevention means for preventing the slider main body from falling off the handrail member,
The slider body includes a cylindrical body having an opening along the longitudinal direction,
The drop-off preventing means includes an opening / closing member that closes the opening with a load when the lifeline is coupled and an operator falls, and a locking member that locks the opening / closing member and maintains the opening closed. A slider characterized by that.   The opening / closing member slides perpendicularly to the axis of the cylindrical body, and the upper piece is in sliding contact with the upper surface of the cylindrical body, the lower piece is in sliding contact with the lower surface of the cylindrical body, the upper piece and the lower piece 2. The slider according to claim 1, further comprising a connecting piece that connects one end side of the upper piece, formed in a U-shaped cross section, and the lifeline coupled to the other end side of the upper piece.   The opening / closing member is urged in an opening direction of the cylindrical body by the open side maintaining means, and the open side maintaining means includes a pin suspended from one side surface of the cylindrical body, An insertion hole that is opened in the connecting piece of the opening and closing member and through which the pin is inserted, and an open-side biasing spring that is interposed between one side surface of the cylindrical body and the connecting piece. The slider according to claim 2, which is characterized. A guide having a substantially L-shaped cross section is coupled to the lower surface on the other end side of the upper piece of the opening / closing member, and the guide piece includes a horizontal piece coupled along the upper piece, and an end of the horizontal piece. It consists of a vertical piece suspended from the bottom,
5. The slider according to claim 3, wherein the vertical piece is in contact with a side surface of the cylindrical body when the opening / closing member opens an opening of the cylindrical body. A lock pin in which the lock member intersects the pin; a locking hole formed in the opening / closing member and engaged with a tip of the lock pin; and a lock spring for biasing the lock pin toward the locking hole. Prepared,
3. The locking pin according to claim 2, wherein when the opening / closing member closes the opening, a tip end of the lock pin is opposed to the locking hole and is engaged with the locking hole by a biasing force of the lock spring. 4. The slider according to any one of 4. In a framework scaffold that consists of a plurality of scaffolding units consisting of a pair of left and right building frames and a scaffolding board laid between these building frames, and arranging a plurality of these scaffolding units along the work object,
The building frame consists of a pair of vertical members and a horizontal member that is supported between the vertical members and supports the scaffolding board.
A handrail composed of a pair of left and right struts standing on the side opposite to the work object of the scaffolding plate and a bar-shaped handrail member constructed between these struts;
A stopper member comprising a stopper body having a substantially U-shaped cross section at the end of the handrail member of the scaffold unit located on both sides, and a hook for fixing the stopper body to the handrail member,
The slider according to any one of claims 1 to 5 is slidably attached to the handrail member,
The frame scaffold according to claim 1, wherein the stopper member prevents the slider from moving beyond the stopper member.

Images