JP5121215B2 - Corner step - Google Patents

Description

  The present invention relates to a corner step of a scaffold plate, and one of the cross sections orthogonal to each other at a corner where a work floor combined passage formed by the scaffold plate of the frame scaffold and another work floor combined passage orthogonal thereto intersect. The present invention relates to a corner step that is attached to a cross member of a scaffold for a scaffold on which the one scaffold plate is spanned so as to close a gap between a gable side end of the scaffold plate and a girder end of the other scaffold plate.

  As a conventional corner step, a publicly known document such as a public gazette cannot be specifically shown, but the corner step currently used will be specifically described with reference to FIGS. 8 and 9. As shown in FIG. 8, at a corner portion where, for example, a vertical passage P1 which is also used as a work floor and is formed by a scaffolding plate 1 of a framework scaffold and a horizontal passage P2 orthogonal to the vertical passage P1, the horizontal passage P2 A gap S of, for example, 6 to 7 cm is formed between the end of the end of the scaffolding plate 1 and the end of the longitudinal side of the longitudinal passage P1 except for the cross member 3 of the building frame 2 for the scaffold. Since it is dangerous to leave the gap S, the corner step 51 is attached so as to close the gap S.

  As shown in FIGS. 9A to 9C, the conventional corner step 51 is formed by attaching hooks F similar to the scaffold plate 1 to the left and right ends of the front end portion of the rectangular plate-like step body 52. . The hook F engages with the cross member 3 to prevent the hook main body 53 from moving upwardly. 9, the falling lock 54 is inserted into the upper and lower elongated holes 55 and 56 by pins 57 and 58 fixed to the hook body 53, as shown in FIG. It is slidably mounted between a locked position indicated by a solid line and an unlocked position indicated by a two-dot chain line, and is normally held in the locked position by its own weight, and at this locked position, the hook body 53 and the falling lock 54 are cross members. Thus, the hook body 53 is prevented from moving upward, and the scaffold plate 1 is prevented from being lifted. As can be seen from FIG. 7, the width of the step body 52 is the same as that of the scaffold plate 1, and the length is substantially the same as the width of the scaffold plate 1.

  When the corner step 51 is attached, as shown in FIG. 8, the hooks F and F are locked to the cross member 3 of the scaffolding frame 2 over which the scaffold plate 1 of the lateral passage P2 is stretched. Then, by placing the rear end portion side of the step body 52 on the scaffolding plate 1 on the side of the lateral passage P1, the end portion on the side of the scaffolding plate 1 of the lateral passage P2 and the end portion on the side of the longitudinal passage P1 of the vertical passage P1. It is possible to close the gap S between the two and secure the work. When the hook F is locked to the cross member 3, if the hook main body 53 is locked to the cross member 3 from above after the drop lock 54 is lifted and unlocked, the drop lock 54 is moved down by its own weight and locked. Position. And when removing the corner step 51, as shown in FIG. 8, from the gap | interval s of 3-4cm between the wife side end surface of the scaffolding board 1 by the side passage P2 side, and the cross member 3 of the scaffold 2 for scaffolds. What is necessary is just to insert a hand in the lower surface side of the cross member 3, and to lift the fall lock 54 of each hook F, and to release the lock.

  In the conventional corner step 51, when the step 51 is attached to the corner portion and then removed, as described above, the gap between the end surface of the scaffolding plate 1 and the cross member 3 of the scaffolding frame 2 is used. A hand is inserted into the lower surface side of the cross member 3 through the gap s and the locks 54 of the hooks F are lifted to release the lock. However, depending on the scaffold board used, the end face of the scaffold side and the scaffold side In some cases, there is no gap between the cross frame and the building frame. In that case, the release operation of the drop lock cannot be performed, and the corner step cannot be attached. 10 (a) shows a case where a gap s is formed between the end face a of the scaffolding board 1 and the cross member 3 of the scaffolding frame 2, and FIG. 10 (b) shows the end of the scaffolding board 1 at the end of the wife. A case where a gap closing cover portion K for closing a gap with the cross member 3 is attached is shown. 10 (a) and 10 (b), 4 is a vertical member of the scaffolding frame 2 and 5 is a hook of the scaffold plate 1 locked to the cross member 3. In FIG.

  In view of the above problems, the present invention makes it easy to unlock the fallen lock from the front side of the step after the step attachment even in the case of a scaffold plate in which a gap closing cover portion that closes the gap with the cross member is provided at the end of the wife side. The purpose is to provide a corner step that can be performed.

Means for solving the above problems will be described with reference numerals of the embodiments described later. The invention according to claim 1 is a work floor combined passage P1 formed by a scaffolding plate 1 of a frame scaffold and this. A corner that closes the gap S between the end of one end of the scaffolding plate 1 and the end of the other side of the other scaffolding plate 1 at the corner where the other passage P2 that intersects perpendicularly intersects. Step,
At the left and right ends of the front end portion of the rectangular plate-shaped step body 12, hook bodies 13, 13 that are detachably engaged with the cross member 3 of the scaffold building frame 2 from above are projected, and the front end of the step body 12 A receiving bracket 14 is provided on the lower surface side of the intermediate portion in the left-right direction separately from the hook bodies 13, 13. The receiving bracket 14 is engaged with the cross member 3 and is attached to the hook body 13. The falling lock 15 for preventing movement in the direction is swingable between a lock position for preventing upward movement of the hook body 13 and an unlock position for allowing upward movement thereof, and is always Is attached so as to be held in the locked position by its own weight, and an operation piece 16 for pulling up the falling lock 15 from the locked position to the unlocked position is hooked from the through-hole 17 penetrating the front end portion of the step body 12. Front side of body 13 And characterized by being continuously to fall lock 15 so as to protrude.

  According to a second aspect of the present invention, in the corner step according to the first aspect, a pair of upper and lower pairs of left and right drop locks 15, 15 are horizontally mounted between a pair of opposite support wall portions 14 a, 14 a of the receiving metal fitting 14. These pins 19 and 20 are swingable between a locked position and an unlocked position, and are attached so as to be held at the locked position by their own weight at all times.

  The effect of the invention by the above solution will be described with reference numerals of the embodiments described later. According to the invention according to claim 1, when the corner step 11 is removed, the operation piece 16 is picked up and locked. The cover portion that can be easily removed by lifting the step body 12 as it is in the unlocked state, with the falling lock 15 held in position unlocked, and thus closing the gap with the cross member 3 on the end of the scaffolding plate Even when the corner step 11 is installed, the lock 15 can be unlocked from the front side of the step body 12.

  As in the invention according to claim 2, the pair of left and right drop locks 15, 15 are locked by a pair of upper and lower pins 19, 20 laid horizontally between a pair of opposite support wall portions 14 a, 14 a of the receiving metal fitting 14. It is possible to swing between the position and the unlocking position and to attach it so that it is always held in the locked position by its own weight, so that the thickness of each drop lock 15 can be reduced, the manufacturing cost can be reduced, and the right and left The pair of drop locks 15 and 15 can accurately perform the locking action.

  A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 (a) is an overall schematic plan view showing a mounting state of a corner step 11 according to the present invention, and (b) is a side view of the mounting state. 2 (a) is a plan view of the corner step 11, (b) is a side view, (c) is a bottom view, and FIG. 3 (a) is a portion indicated by an arrow a in FIG. 2 (a). (B) is a cross-sectional view of the knee line of (a), FIG. 4 is an enlarged cross-sectional view of the roll line of (a) in FIG. A state is shown, and (b) shows a state where the lock is in the unlocked position. 5 (a) is an enlarged view of the portion indicated by (c) in FIG. 2, (b) is a sectional view of the ho-ho line of (a), and (c) is a side view of (a). .

  As shown in FIGS. 2A to 2C, the corner step 11 is composed of a step body 12 having a rectangular shape in plan view formed of a metal plate. Is given. At the left and right ends of the front end portion of the rectangular plate-shaped step body 12, hook bodies 13 and 13 that are detachably locked from above with respect to the cross member 3 of the scaffold building frame 2 are projected, and the step body A front U-shaped receiving bracket 14 projects from the lower surface of the front end portion of the front left and right direction, and engages with the cross member 3 of the scaffolding frame 2 to engage the hook body 13. The falling lock 15 for preventing the upward movement of the hook is swingable between a locked position for preventing the upward movement of the hook body 13 and an unlocked position for allowing the upward movement thereof. The operation piece (connecting piece) 16 for attaching the drop lock 15 from the lock position to the lock release position is attached to the front end portion of the step body 13 while being attached to be held at the lock position by its own weight. From the through-hole 17 that is provided in the It is continuously to fall lock 15 so as to protrude slightly into the surface side of the up main body 12.

  The structure of the corner step 11 will be described in more detail with reference to FIGS. 3 to 7. The hook body 13 has a shape as shown in FIG. It is fixed to both ends by welding. As can be seen from FIGS. 3 (a) and 3 (b) and FIG. 6 (b) and 6 (c), the bracket 14 connects the pair of left and right support wall portions 14a and 14a and both the support wall portions 14a and 14a. It is formed in a U shape with the connecting wall portion 14b and is welded to the back surface 12b of the step body 12 and welded to the reinforcing frame 18 made of an angle material fixed to the back surface 12b of the step body 12. It is fixed.

  As can be seen from FIGS. 7 (a) and 7 (b), the falling locks 15 are arranged in a pair of left and right parallel, and the both falling locks 15 and 15 are integrated with each other via a connecting piece 16 that connects both ends. The connecting piece 16 is always protruded slightly upward from a through-hole 17 provided in the front end portion of the step body 13 so as to lift both drop locks 15 and 15 from the locked position to the unlocked position. The operation piece is configured to

  As can be seen from FIGS. 3 and 4, the both falling tablets 15, 15 are provided through the front end of the step body 12 so that the connecting piece (operation piece) 16 remains on the surface 12 a side of the step body 12. A pair of upper and lower pins 19, 20 that are inserted into the slit-like through-holes 17, 17 from the surface 12 a side of the step body 12 and are horizontally mounted between the opposing support wall portions 14 a, 14 a of the receiving bracket 14, 4 are inserted into the upper long holes 21 and 21 and the lower long holes 22 and 22, respectively, penetrating the drop locks 15 and 15, so that both the drop locks 15 and 15 are in the locked position shown in FIG. And the unlocked position shown in (b), and is normally held in the locked position by its own weight (see (b) in FIG. 3 and (b) in FIG. 5). ).

  2 to 5, reference numeral 23 denotes a finger insertion hole penetrating through a required position of the step body 12 so that the finger can be inserted when the dropping lock 15 is manually lifted from the lock position to the unlock position 5. It has become. 6 (b) and 6 (c), reference numeral 24 denotes a pin insertion hole provided on the upper side of the support wall portions 14a, 14a of the receiving metal fitting 14, and the upper side pin 19 is inserted. The lower pins 20 are inserted through pin insertion holes provided on the lower sides of the support wall portions 14a and 14a.

  When mounting the corner step 11 configured as described above, as shown in FIGS. 1 and 2, both the left and right sides of the cross member 3 of the scaffold building frame 2 on which the scaffold plate 1 of the lateral passage P2 is stretched are mounted. The hook main bodies 13 and 13 are locked, and the rear end portion side of the step main body 12 is placed on the scaffold plate 1 on the side of the lateral passage P1, so that the end of the side of the scaffold plate 1 of the lateral passage P2 in the corner portion is provided. And the gap S between the vertical passage P1 and the end of the longitudinal passage P1 can be closed to ensure work safety.

  When the hook body 13 is locked to the cross member 3 when the corner step 11 is attached, if the operation piece 16 protruding upward from the through-hole 17 at the front end portion of the step body 13 is picked up and dropped, the hook body 13 falls. Since the lock 15 is unlocked, both the hook main bodies 13 and 13 may be locked to the cross member 3 in a state where the operation piece 16 is picked and pulled up. After the lock, if the hand is released from the operation piece 16, The falling locks 15 and 15 swing downward with their own weight and are held in the locked position.

  When removing the corner step 11, as in the case of the attachment, the operation piece 16 is picked up and lifted, and the step lock 12 is lifted as it is in the unlocked state while the locks 15 and 15 held at the lock position are unlocked. The corner step 11 can be easily removed.

  Therefore, according to this corner step 11, even when a cover portion that closes the gap with the cross member 3 is provided at the end of the scaffolding plate on the end side, the drop lock 15 is attached from the front side of the step body 12 after the corner step 11 is attached. Can be unlocked.

  In the embodiment described above, a pair of left and right falling locks 15 are provided, and a pair of upper and lower pins 19 that are horizontally mounted between a pair of supporting wall portions 14a and 14a on both sides of the receiving metal fitting 14 that are opposite to each other. However, the number of the drop tablet 15 may be one. In that case, the thickness of the drop tablet 15 is preferably as thick as possible. However, if a pair of left and right drop locks 15 are provided as in this embodiment, the thickness of each drop lock 15 can be reduced, the manufacturing cost can be reduced, and the pair of left and right drop locks 15 and 15 can provide an accurate locking action. Can be done.

FIG. 1A is an overall schematic plan view showing an attachment state of the corner step 11 according to the present invention, and FIG. 1B is a side view of the attachment state. 2A is a plan view of the corner step 11, FIG. 2B is a side view, and FIG. 2C is a bottom view. 3A is an enlarged view of a portion indicated by an arrow A in FIG. 2A, and FIG. 3B is a sectional view of the knee line in FIG. 4A and 4B are enlarged cross-sectional views of the roll line of FIG. 2A, in which FIG. 4A shows a state where the drop lock is in the locked position, and FIG. 4B shows a state where the drop lock is in the unlocked position. 5 (a) is an enlarged view of the portion indicated by (c) in FIG. 2, (b) is a sectional view of the ho-ho line of (a), and (c) is a side view of (a). . (a) is a front view showing the hook body, (b) is a side view of the receiving metal fitting, and (c) is a plan view of the receiving metal fitting. (a) is a front view of the drop lock, and (b) is a plan view. It is a schematic plan view which shows the attachment state of the conventional corner step. (a) is a plan view of a conventional corner step, an embodiment is a side view, and (c) is a side view showing a hook of the corner step. (a) is a plan view showing a scaffold plate in which a gap is formed between the end surface of the scaffolding board and the cross member, and (b) is a plan view showing the scaffold plate having a gap closing cover attached to the end of the side of the scaffold. It is.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Scaffold board 2 Scaffolding frame 3 Scaffolding frame crosspiece 11 Corner step 12 Step main body 12a Step main body surface 12b Step main body back surface 13 Hook main body 14 Receiving bracket 15 Drop lock 16 Operation piece 17 Through-hole 19, 20 pin

Claims (2)

At the corner where the work floor combined passage formed by the scaffolding plate of the framework scaffolding and the other passage perpendicular to this intersect, the wife side end of one scaffolding plate and the beam side end of the other scaffolding plate It is a corner step that closes the gap between the parts,
At the left and right ends of the front end of the rectangular plate-shaped step body, a hook body that is detachably engaged with the cross member of the scaffolding frame from above is projected, and the lower surface in the left and right middle part of the front end of the step body A receiving bracket is provided on the side separately from the hook body, and a falling lock for engaging the cross member to prevent the hook body from moving upward is provided on the receiving bracket. The main unit can be swung between a lock position that prevents upward movement of the main unit and an unlocked position that allows upward movement of the main unit. A corner step in which an operating piece for pulling up the lock from the locked position to the unlocked position is connected to the falling lock so as to protrude from a through hole provided at the front end of the step body toward the surface of the hook body.   A pair of left and right drop locks can be swung between a locked position and an unlocked position by a pair of upper and lower pins that are horizontally mounted between a pair of opposing support walls on the opposite side of the receiving metal. The corner step according to claim 1, wherein the corner step is attached to be held by the corner step.

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