JP4617281B2 - 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 conventional corner steps, numbers such as patent publications cannot be specifically shown, but the corner steps currently used will be specifically described with reference to FIGS. As shown in FIG. 7, at a corner portion where, for example, the vertical passage P1 also serving as a work floor formed by the scaffolding plate 1 of the framework scaffold and the horizontal passage P2 orthogonal to the vertical passage P1 intersect, 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. 8A to 8C, 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. The lock member 54 is generally composed of an arc-shaped lock member 54 called a drop lock, and the lock member 54 is passed through long holes 55 and 56 at two locations on the upper and lower sides and fixed by the pins 57 and 58 fixed to the hook body 53. (C) of 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 its locked position by its own weight. At this locked position, the hook body 53 and the lock member 54 It will be in the state which holds half or more of the outer periphery of the material 3, it will prevent the hook body 53 from moving upward, and the scaffold plate 1 will be prevented from lifting. 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 thereof is substantially the same as the width of the scaffold plate 1.

  When the corner step 51 is attached, as shown in FIG. 7, 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 scaffold plate 1 of the lateral passage P2 and the end portion on the side of the longitudinal passage P1 of the lateral passage 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 lock member 54 is lifted and unlocked, the lock member 54 moves downward by its own weight and locks. Position. And when removing the corner step 51, as shown in FIG. 7, from the gap | interval s of 3-4 cm between the wife side end surface of the scaffolding board 1 by the side passage P2 side, and the cross member 3 of the scaffolding frame 2 is shown. What is necessary is just to insert a hand into the lower surface side of the cross member 3, and to lift the lock member 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. The hand is inserted into the lower surface side of the cross member 3 from the gap s, and the lock member 54 of each hook F is lifted to release the lock. However, depending on the scaffold plate used, the end surface of the scaffold side and the scaffold side In some cases, there is no gap between the cross frame and the building frame. In this case, the lock member cannot be released, so that the corner step cannot be attached. 9 (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. 9 (b) shows the end of the scaffolding board 1 on the wife side. A case where a gap closing cover portion K for closing a gap with the cross member 3 is attached is shown. 9 (a) and 9 (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 view of the above problems, the present invention makes it easy to unlock the lock member 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 for closing the gap with the cross member is provided at the end on the side of the wife. 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. Corner step that closes the gap between the end of one end of the scaffolding plate 1 that is orthogonal to the end of the other side and the end of the other side of the scaffolding plate 1 Because
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 pair of left and right brackets 14, 14 are attached to the lower surface side of the intermediate portion in the left-right direction, and a pair of left and right locks between the brackets 14, 14 prevent the horizontal member 3 from moving upward on the hook body 13 A lock member 18 having pieces 15, 15 is arranged, and between each bracket 14 and the lock member 18, there is a substantially U having a pivot portion a on the proximal end side and a locking shaft portion b on the distal end side parallel to the pivot portion a. A spring that interposes the lock pin 20 in a letter shape and biases the locking shaft portion b between each lock pin 20 and each bracket 14 so as to engage with a locking hole 21 provided in the bracket 14. 22 and the lock member 18 is The pivot shaft portion a of the cup pin 20 is pivotally supported by each bracket 14 so as to be rotatable between a locked position and an unlocked position, and the locking shaft portion b is normally locked in a locking hole 21 provided in the bracket 14. Thus, the two lock pins 20 and 20 are inserted into the two operation openings 24 and 24 provided at the front end portion of the step body 12 so that two fingers are inserted. By pulling 20, both locking shaft portions b are pulled out from the locking holes 21 and unlocked.

  According to a second aspect of the present invention, in the corner step according to the first aspect, the locking shaft portion b of each lock pin 20 is detached from the locking hole 21 of each bracket 14 between the lock member 18 and each bracket 14. In this state, a spring 23 for biasing the lock member 18 to the lock position is interposed.

  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, the scaffold plate 1 to be used has the cross member 3 at the end of the wife side. Even if it has a gap closing cover portion K that closes the gap, the lock member 18 can be unlocked from the front side of the step body 12 after the corner step 11 is attached.

  Then, according to this corner step, a pair of left and right lock pins 20, 20 are inserted into two operation openings 24, 24 provided at the front end of the step body 12, and two lock pins 20, 20 are inserted. Since the lock shafts b and b at the lock position are pulled out of the lock holes 21 and 21 to release the lock, the lock member 18 is unlocked by operating from the front side of the step body 12. This can be done easily and easily with two fingers.

  According to the corner step of the invention according to claim 3, the locking shaft portions b and b are pulled out from the locking holes 21 and 21 by pulling the lock pins 20 and 20 from the operation openings 24 and 24 with a finger. After releasing the lock, when the fingers are released from the lock pins 20, 20, the lock member 18 is urged to rotate to the lock position by the spring 23. Therefore, the lock operation of the lock member 18 is easy, and the corner The attachment work of step 11 becomes easy.

  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. FIG. 2 is a partially enlarged plan view of FIG. 3A is a sectional view taken along line XX in FIG. 2, FIG. 3B is a sectional view taken along line YY in FIG. 2, and FIG. 4 is a bottom view of the main structure of the corner step 11 as viewed from the lower surface side. FIG. In FIG. 1, similarly to FIG. 7 showing the conventional corner step 51, the vertical passage P1 also serving as a working floor formed by the scaffolding plate 1 of the frame scaffolding and the horizontal passage P2 orthogonal to the vertical passage P1 intersect. Although the corner portion is shown, each scaffold plate 1 is a type of scaffold plate in which a gap closing cover portion K that closes the gap with the cross member 3 is provided at the end of the wife as shown in FIG. 9 (b). It is.

  As shown in FIGS. 1A and 1B, 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. The rectangular plate-shaped step body 12 is provided with hook bodies 13 and 13 protruding from the upper side to the cross member 3 of the scaffolding frame 2 so as to be freely detachable from the upper and left ends of the front end portion. A pair of left and right lock member mounting brackets 14 and 14 are attached to an intermediate portion between the hook main bodies 13 and 13 on the lower surface side of the front end portion of the main body 12, and the scaffold building frame 2 is interposed between the brackets 14 and 14. A pair of left and right ear pieces 16, 16 each having an arc-shaped lock piece 15 that prevents the hook body 13 from moving upward with respect to the cross member 3, and a connecting piece 17 that connects the two ear pieces 16, 16. A lock member 18 is arranged, and the lock member 18 has an ear piece 16, 16 side portion on the lower surface of the front end portion of the step body 12 in the width direction as shown in FIGS. Reinforcement made of angled material installed across It is inserted into 19 of the corner opening 19o.

  As shown in FIG. 3 (b) and FIG. 4, each bracket 14 has a substantially downward U-shape with both side plate portions 14a, 14a and a bottom plate portion 14b connecting both side plate portions 14a, 14a. The bottom plate portion 14b is fixed to the lower surface of the step body 12. A locking hole 21 into which a locking shaft portion b of the lock pin 20 below is engaged is provided in the side plate portion 14a inside the both side plate portions 14a, 14a.

  Between each bracket 14 and each ear piece 16 of the lock member 18 adjacent thereto, a proximal-side pivot portion a, a distal-side locking shaft portion b extending in parallel thereto, and both shaft portions a, b A substantially U-shaped lock pin 20 composed of a connecting portion c for connecting the brackets 14 is interposed, and between each lock pin 20 and each bracket 14, a locking shaft portion b is inserted into a locking hole of the bracket 14. A coil spring 22 that is urged so as to be engaged with 21 is interposed. The coil spring 22 is fitted to the pivot part a of the lock pin 20, one end part is fastened to the tip part of the pivot part a by a fastening pin 25, and the other end part is elastic to the outer plate part 14 a of the bracket 14. Touched. The pivot shaft portion a of the lock pin 20 always passes through the side wall portions 14a, 14a of the bracket 14 and the ear piece 16 side of the lock member 18, and the locking shaft portion b always passes through the ear piece 16 of the lock member 18. At the same time, the coil spring 22 is engaged with the locking hole 21 of the bracket 14 by the urging force of the coil spring 22.

  Therefore, the lock member 18 is engaged with the cross member 3 of the scaffolding frame 2 by the pivot portion a of the lock pin 20 to prevent the hook body 13 from moving upward ((a) in FIG. 6). (See FIG. 6 (b)) which is spaced apart from the cross member 3 and allows the hook main body 13 to move upward. The locking shaft portion b is locked in the locking position by locking the locking shaft portion b in the locking hole 21 of the bracket 14 by the urging force of the coil spring 22.

  Further, when the locking shaft portion b of each lock pin 20 is detached from the locking hole 21 of each bracket 14 between the lock member 18 and each bracket 14, the lock member 18 is attached to the lock position. A coil spring 23 that acts so as to be energized is interposed. That is, the coil spring 23 is fitted to the pivot portion a of the lock pin 20 as schematically shown by a two-dot chain line in FIGS. 3 and 4, and one end thereof is attached to the reinforcing frame 19, and the other end is The locking member 18 is attached to the ear piece 16 side.

  In addition, operation openings 24 and 24 for operating two pairs of left and right lock pins 20 and 20 by inserting two fingers of one hand from the front side of the step body 12 to the front end of the step body 12. Is formed as an opening.

  Accordingly, when the lock member 18 is locked at the lock position as shown in FIG. 6A, in order to unlock the lock member 18 from the front side of the step body 12, the two operation openings 24 are used. , 24, for example, the right thumb and index finger are inserted and the left and right lock pins 20, 20 are pulled in the opposite direction from the state shown in FIG. 4, the locking shaft portion b of each lock pin 20 is moved as shown in FIG. By releasing the locking holes 21 of the brackets 14 and lifting the locking shafts b, b of the lock pins 20, 20 while pulling the lock pins 20, 20, the lock member 18 is lifted. , The lock pieces 15 and 15 are separated from the cross member 3 by rotating around the pivot portions a and a of the lock pins 20 and 20, and the lock is released as shown in FIG. 6 (b).

  When the step body 12 is lifted in the state where the lock member 18 is unlocked in this way, the pair of hook bodies 13 and 13 on both sides come out from the cross member 3 of the scaffolding frame 2 and the corner step 11 is removed. Can do.

  Since the lock member 18 of the corner step 11 includes a pair of left and right lock pieces 15, 15 formed integrally with the lock member 18 at an intermediate position between the hook bodies 13, 13, the pair of lock pieces 15, 15 Thus, the cross member 3 of the scaffolding frame 2 can be accurately grasped, and thus the step body 12 can be installed in a stable state.

  A pair of left and right locking member mounting brackets 14 and 14 are attached to the lower surface side of the step body 12, and a pair of left and right ear pieces 16 and 16 each having a lock piece 15 between the brackets 14 and 14, and both ear pieces. A lock member 18 composed of a connecting piece 17 connecting 16 and 16 is arranged, and between each bracket 14 and each ear piece 16 of the lock member 18, a pivotal portion a on the proximal end side and a distal end side parallel thereto A substantially U-shaped lock pin 20 having an engagement shaft portion b is interposed, and an engagement hole 21 in which an engagement shaft portion b is provided in the bracket 14 between each lock pin 20 and each bracket 14. The lock member 18 is supported by each bracket 14 so as to be rotatable between a lock position and a lock release position by a pivotal portion a of each lock pin 20. The locking shaft b is normally blocked. Two operating openings provided at the front end of the step body 12 are provided with a pair of left and right lock pins 20, 20 so that they are locked in the locked position by engaging with the locking holes 21 provided in the ket 14. By inserting two fingers from 24 and 24 and pulling both lock pins 20 and 20 together, both locking shafts b and b in the locked position are pulled out from the locking holes 21 and 21 and unlocked. Therefore, the unlocking operation of the lock member 18 can be easily and easily performed from the front side of the step main body 12 with the two fingers of the operator's hand from the front side of the step main body 12.

  In the corner step of the above-described embodiment, the locking member 18 is in a state where the locking shaft portion b of each lock pin 20 is detached from the locking hole 21 of each bracket 14 between the locking member 18 and each bracket 14. Since the spring 23 that biases the lock position to the lock position is interposed, the lock shafts b and b are locked to the lock holes 21 by pulling the lock pins 20 and 20 with fingers from the operation openings 24 and 24. , 21 to release the lock and then release the finger from both lock pins 20, 20, so that the lock member 18 is urged to rotate to the lock position by the spring 23. The corner step 11 can be easily attached.

(a) is a schematic plan view which shows the attachment state of the corner step which concerns on this invention, (b) is a side view of the attachment state. FIG. 2 is a partially enlarged plan view of FIG. 1. (a) is a sectional view taken along line XX in FIG. 2, and (b) is a sectional view taken along line YY in FIG. It is the bottom view which looked at the principal part structure of the corner step from the lower surface side, and shows a state where the lock member is in the lock position. FIG. 5 is a bottom view similar to FIG. 4 with the locking member in the unlocked position. (a) is a side view of the state in which the lock member is in the locked position, and (b) is a side view of the state in which the lock member is in the unlocked position. It is a schematic plan view which shows the attachment state of the conventional corner step. (a) is a plan view showing a conventional corner step, (b) 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 scaffold plate on the side of the wife 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 wife. It is.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Scaffolding board 2 Scaffolding frame 3 Scaffolding frame crosspiece 11 Corner step 12 step body 13 Hook body 14 Locking member mounting bracket 15 Lock piece 16 Ear piece 17 Connection piece 18 Lock member 20 Lock Pin 21 Locking hole 22 Spring 23 Spring 24 Operation opening

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 pair of left and right brackets are attached to the side, and between the brackets, a lock member having a pair of left and right lock pieces that prevent the hook member from moving upward with respect to the cross member is disposed. In between, a substantially U-shaped lock pin having a pivot portion on the base end side and a lock shaft portion on the distal end side parallel to the pivot shaft portion is interposed, and a lock is provided between each lock pin and each bracket. A spring that urges the shaft portion to engage with a locking hole provided in the bracket is interposed, and the lock member can be rotated between a lock position and a lock release position by a pivot portion of each lock pin. It is pivotally supported by the bracket and is normally a locking shaft Is locked in the locking position by engaging the locking hole provided in the bracket, and the two lock pins are inserted into the two operation openings provided in the front end of the step body, and two fingers are inserted. A corner step where both lock shafts are pulled out of the lock holes and unlocked by pulling the lock pins together.   A spring is provided between the lock member and each bracket to bias the lock member to the lock position in a state in which the lock shaft portion of each lock pin is detached from the lock hole of each bracket. The corner step according to 1.

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