JP2019157483A - Funnel-shaped protective shelf device for temporary scaffold - Google Patents

Abstract

To provide a funnel-shaped protective shelf device for temporary scaffold which has no risk of a rear end part of a support member unexpectedly coming off from a holding member, and which can make the holding member more compact.SOLUTION: In a funnel-shaped protective shelf device 1 for temporary scaffold, a front end part of a support member 8 is rotatably connected to the intermediate part of length of a vertical frame member 3 constituting part of a square frame 6 in which a mesh sheet 7 is stretched and fixed, and a rear end part of the support member is held by a holding member 9 mounted on a support pillar S1. At the rear end part of the support member, an engaging pin 11 having a shaft part 111 and a head part 112 is mounted in a protrusive manner. On a holding wall part 911 of the holding member, a guide groove 12 extending vertically and locking grooves 13A, 13B, 13C, 13D extending frontward from a plurality of height positions of the guide groove are formed. At the height position corresponding to substantially the width center of an opening of each locking groove excluding the lowermost locking groove on a guide groove rear side edge of the holding wall part, a protrusion 16 for locking pin coming-off prevention is formed.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a morning glory device for a temporary scaffold that is installed in a projecting manner on a temporary scaffold and is used to prevent an accident due to a fall of materials, tools, and the like from the temporary scaffold.

As a morning glory device for a temporary scaffold, for example, as shown in Patent Document 1 below, two connecting members respectively attached to predetermined height positions of front side portions of two struts arranged side by side in the temporary scaffold; Two swingable vertical frame members whose rear end portions are pivotally connected to each connecting member about a horizontal axis extending in the left-right direction, and the front end portions and the rear end portions of both vertical frame members Front and rear horizontal frame members, which are respectively secured, and a sheet material such as a sheet that is secured to a rectangular frame formed by both vertical frame members, front horizontal frame members, and rear horizontal frame members. A rod-like support member whose front end is pivotally connected to the front end or middle length of each vertical frame member, and a support member attached at a position lower than the connection member at the front side of each column. Two holding the rear end of It made a holding member is known.
An engagement pin having a horizontal shaft portion protruding toward the left or right side and a head portion provided at the tip of the shaft portion is attached to the rear end portion of each support member.
Each holding member is composed of a rectangular tube extending vertically, and a guide groove extending vertically is formed on the left and right side walls. The width of the guide groove is larger than the outer diameter of the shaft portion of the engaging pin and smaller than the outer diameter of the head portion of the engaging pin. In addition, on the left and right side walls of each holding member, an introduction groove that protrudes rearward and is larger than the outer diameter of the head of the engagement pin is formed in the vicinity of the upper end of the guide groove. The shaft portion is inserted into the guide groove. Furthermore, the left and right side walls of each holding member are formed with locking grooves that extend short forward from a plurality of predetermined height positions in the guide groove, and are supported according to a plurality of preset swing angles of the rectangular frame. As the position of the lower end portion of the member moves in the vertical direction, the shaft portion of the engaging pin can be locked by the edge of the deep bottom portion of each locking groove.

Japanese Patent No. 5999539

In the morning glory device described above, when the opening and closing operation of the square frame with the face material is performed, the head of the engaging pin is bent at the location where the guide groove and each locking groove except the lowest locking groove intersect. Therefore, it is necessary to make the head of the engagement pin sufficiently large so that the entire size of the holding member increases accordingly. It was difficult.
In the case of the morning glory device described above, for example, in a strong wind such as a typhoon, the face frame with the face material is closed so as to be substantially vertically upward and tied to the support column of the temporary scaffold with a rope. Thus, when the square frame with the face material is closed, the engaging pin of the support member is located near the upper end of the guide groove of the holding member, but if for some reason the rope becomes loose, The square frame with material receives wind pressure and falls in the opening direction. At this time, when the square frame with the face material stops at the position where it is most opened, that is, when the shaft portion of the engaging pin of the support member is locked to the edge of the lowest locking groove of the holding member, it acts on the support member. The load such as wind pressure is the smallest, but if the shaft part of the engagement pin enters the upper locking groove and is locked to the edge, a large load acts on the support member and deformation or Damage may occur. In order to avoid such a situation, it is necessary to sufficiently increase the load bearing strength of the support member, but this may increase the weight of the support member and increase the cost.

This invention is made in view of said subject, Comprising: There is no possibility that the rear-end part of a supporting member may remove | inadvertently remove from a holding member, and the morning glory device for temporary scaffolds which can make a holding member compact The purpose is to provide.
Another object of the present invention is to provide a morning glory for a temporary scaffold that can prevent deformation and breakage of the support member due to dropping of the square frame with the face material without increasing the load bearing strength of the support member more than necessary. To provide an apparatus.

In order to achieve the above object, the present invention comprises the following aspects.
In specifying the present invention, the temporary scaffold side (for example, the left side of FIG. 1) is referred to as “rear”, the morning glory device side (for example, the right side of FIG. 1) is referred to as “front”, It means the case where it sees.

1) A horizontal axis in which connecting members are respectively attached to predetermined height positions of front side portions of a plurality of support columns arranged at intervals on the left and right sides of the temporary scaffold, and the rear end portion of the vertical frame member extends in the left-right direction on each connecting member. The front horizontal frame member and the rear horizontal frame member are respectively passed between the front end portions and the rear end portions of the two vertical frame members that are connected to each other so as to be rotatable around the two columns. While being fixed, a face material is fixed to a rectangular frame formed by both the vertical frame members, the front horizontal frame member, and the rear horizontal frame member, and a bar-like support member at the front end portion or the middle portion of the length of each vertical frame member The morning glory device for a temporary scaffold, in which a front end portion of the support member is connected so as to be rotatable about a horizontal axis, and a holding member for holding the rear end portion of the support member is attached at a position lower than the connection member on the front side portion of each column. Because
An engagement pin having a horizontal shaft portion extending in the left-right direction and a head portion provided at the tip of the shaft portion is attached to the rear end portion of each support member in a protruding manner,
Each holding member has a vertical holding wall part with both sides facing left and right. The holding wall part can extend vertically and pass the shaft part of the engaging pin, but the head part of the engaging pin can pass through it. And a plurality of locking grooves extending forward from a plurality of predetermined height positions including a lower end position of the guide groove, and a plurality of predetermined swinging angles of the vertical frame member. In accordance with the position of the rear end portion of the support member moving in the vertical direction, the shaft portion of the engagement pin can be locked by the edge of the bottom portion of each locking groove,
On the rear side edge of the guide groove in the holding wall portion, a locking pin protruding toward the opening at a height position substantially corresponding to the center of the width of each locking groove except for the lowest locking groove A morning glory device for a temporary scaffold, in which a drop-off preventing projection is formed.

2) When the guide frame is dropped from the closed state in which the rectangular frame with the face material is substantially vertically upward in the upper part of each locking groove except the lowest locking groove, the shaft portion of the locking pin is The morning glory device for a temporary scaffold according to the above 1), which has a backward bent portion for preventing entry into the locking groove.

  According to the morning glory device for a temporary scaffold of 1) above, at a height position substantially corresponding to the center of the width of each locking groove except the lowest locking groove on the rear side edge of the guide groove in the holding wall. Since the locking pin drop-off preventing projection is formed, the square frame with face material can be opened and closed even when the head of the engaging pin is made smaller compared to the morning glory device described in Patent Document 1 above. In addition, there is no risk that the head of the engaging pin will be rolled and removed at a location where the guide groove and each locking groove except the lowest locking groove intersect, and the holding member can be made more compact. is there.

  According to the morning glory device for a temporary scaffold of 2) above, the guide groove has a rearward bent portion at the upper portion of each locking groove except for the lowest locking groove. Since the shaft portion of the locking pin is prevented from entering the locking grooves when the frame is dropped from a substantially vertically upward closed state, compared to the morning glory device described in Patent Document 1, the supporting member Without increasing the load bearing strength more than necessary, it is possible to prevent the support member from being deformed or damaged due to the dropping of the square frame with the face material.

1 is a side view of a morning glory device for a temporary scaffold according to a first embodiment of the present invention. It is a top view of the apparatus. It is an enlarged side view of the holding member of the apparatus. FIG. 4 is a partially enlarged horizontal sectional view taken along line AA in FIG. 3. It is a side view which expands and shows the intersection part of the guide groove in the holding member and three latching grooves other than the lowest. It is a side view which expands and shows the holding member of the morning glory apparatus for temporary scaffolds concerning 2nd Embodiment of this invention. It is a side view which expands and shows the intersection part of the guide groove in the holding member and three latching grooves other than the lowest.

<First Embodiment>
1 to 5 show a morning glory device (1) for a temporary scaffold according to a first embodiment of the present invention.
Here, the temporary scaffold (S) shown in the figure is a wedge-tight scaffold, and the required number of struts (S1) are set up in two rows in the front and rear and spaced in the left-right direction for each row. It has been. A plurality of U-shaped socket fittings (S11) as viewed from above are welded and fixed at predetermined intervals in the vertical direction on the front, rear, left and right sides of the surface of each support column (S1). Wedge-shaped insert fittings that are suspended from the front and rear socket fittings (S11) facing each other at a predetermined height position of the two pillars (S1) arranged in the front and rear (S2). S21) is inserted from above, thereby connecting the columns (S1) and the crosspieces (S2). Hooks (S31) provided at the left and right ends of the tread board (S3) are hooked to the two side bars (S2) adjacent to the left and right, thereby the tread board (S3) is secured to both side bars (S2). It has been. Wedge-shaped insert fittings (not shown) provided on the left and right socket fittings (S11) facing each other at the predetermined height positions of two adjacent struts (S1) in a hanging manner on both ends of the handrail (S4) Is inserted so that the handrail (S4) is prevented from passing between the columns (S1).
The morning glory device according to the present invention is not limited to the temporary scaffolding (S) having the above-described structure, and can be installed on, for example, other wedge-tightened scaffolds with different types and arrangements of socket fittings, frame scaffolds, and single tube scaffolds. .

  As shown in FIGS. 1 and 2, the morning glory device (1) for the temporary scaffold of this embodiment is a predetermined side portion of a plurality of front columns (S1) arranged at intervals on the left and right sides of the temporary scaffold (S). A connecting member (2) is attached at each height position, and the rear end of the vertical frame member (3) is connected to each connecting member (2) so as to be rotatable about a horizontal axis extending in the left-right direction, The front horizontal frame member (4) and the rear horizontal frame member (5) pass between the front end portions and the rear end portions of the two vertical frame members (3) located in front of the two adjacent struts (S1). At the same time, the face material (7) is secured to the rectangular frame (6) formed by the two vertical frame members (3), the front horizontal frame member (4) and the rear horizontal frame member (5). The front end portion of the rod-shaped support member (8) is connected to the front end portion or the middle length portion of the frame member (2) so as to be rotatable about the horizontal axis, and the connecting member (2 on the front side portion of each column (S1)) )Than Holding member for holding the rear end portion of the support member to the lower position (8) (9) in which is mounted.

The connecting member (2) includes a vertical plate-like portion (21) and a U-shaped connecting portion (22) that opens forward as viewed from a plane provided continuously to the front edge of the vertical plate-like portion (21). I have.
A clamp (23) that can be fastened and fixed to the support post (S1) is attached to the vertical plate-like portion (21).
Inside the connecting portion (22), two insertion cylinders (24) into which the rear end portion of the vertical frame member (3) can be inserted are arranged side by side. Both insertion cylinders (24) are individually swingably connected to the connecting portion (22) by connecting shafts that pass through one end portions of these and loosely pass to the left and right side walls of the connecting portion (22). Yes.
The structure of the connecting member (2) is not limited to the above. For example, the rear end portion of the vertical frame member (3) is connected to the connecting portion (22) without providing the two insertion cylinders (24). May be directly attached. Also, instead of the clamp (23) or in addition to the clamp (23), a wedge-shaped insert fitting that can be inserted into the socket fitting (S11) on the front side of the support post (S1) may be provided on the connecting member (2). Good. Further, when the morning glory device (1) is small in size, the connecting member (2) and the holding member (9) may be integrated.

The vertical frame member (3) is made of a metal square tube or square bar, and its rear end is inserted into the insertion tube (24) of the connecting member (2), for example, by a lock pin (not shown). It is fixed to the insertion cylinder (24). Thereby, the vertical frame member (3) can swing up and down around the rear end.
As shown in FIG. 2, when installing a plurality of morning glory devices (1) side by side, of the two insertion cylinders (24) of the connecting member (2) attached to the struts (S1) located at both ends. The vertical frame member is inserted into the two insertion cylinders (24) of the connecting member (2) attached to the strut (S1) located in the middle, with the rear end of the vertical frame member (3) inserted only in the inner one. (3) The rear end is inserted.

The front horizontal frame member (4) and the rear horizontal frame member (5) are also each made of a metal square tube material or square bar material, and these two end portions are adjacent to each other by appropriate connecting means. The member (3) is connected and fixed to the front end portion and the rear end portion thereof, thereby forming a rectangular frame (6).
In addition, although illustration is abbreviate | omitted, you may make it provide a brace further as a structural material of a square frame (6).

The face material is composed of a square mesh sheet (7) having a size capable of covering the rectangular frame (6).
The peripheral edge of the mesh sheet (7) is provided on the upper surfaces of the two vertical frame members (3), the front horizontal frame member (4) and the rear horizontal frame member (5) constituting the rectangular frame (6). A plurality of eyelets (71) into which the L-shaped pins (61) and the folding pins (62) are respectively fitted are attached (see FIG. 2). That is, by inserting the L-shaped pin (61) and the folding pin (62) of the square frame (6) into the eyelet (71) of the mesh sheet (7), the mesh sheet (7) is fitted into the square frame (6). Tensioned.
Further, the mesh sheet (7) has a protruding portion (72) protruding rearward from the rear horizontal frame member (5). The protruding portion (72) is folded upward and attached to the two struts (S1) with, for example, a string. The protruding portion (72) allows the mesh sheet (7) and the front of the temporary scaffold (S) to be There is no gap between them.
Instead of the mesh sheet (7), for example, a panel made of FRP may be fastened to the square frame (6) as a face material.

The support member (8) is made of a metal square tube material or square bar material.
The front end of the support member (8) is a horizontal extension extending in the left-right direction to a pair of left and right mounting brackets (31) that are suspended from the middle part (or front end) of the longitudinal frame member (3). It is rotatably connected by a connecting shaft.
An engagement pin (11) is attached to the rear end of the upper surface of the support member (8). The engagement pin (11) includes a horizontal shaft portion (111) penetrating the rear end portions of the left and right side walls of the support member (8) and projecting both end portions from the left and right side walls, and both ends of the shaft portion (111). And a head (112) provided on the head (see FIGS. 3 and 4). In addition, the engagement pin (11) of this embodiment has heads on both left and right ends so that it can be used as a support member (8) for supporting the left and right vertical frame members (3). 112), but the engaging pin (11) is provided so as to protrude only to the left or right from the rear end of the support member (8), and the head is provided only to the protruding end. It may be included. Further, the engagement pin (11) may be welded and fixed to the rear end portion of the upper wall, rear end wall or lower wall of the support member (8).

The holding member (9) includes a rectangular tube portion (91) extending vertically and two vertical plate portions (92) vertically protruding from the rectangular tube portion (91). A clamp (93) that can be fastened and fixed to the support column (S1) is attached to each of the vertical plate portions (92). Instead of at least one of the clamps (93), a wedge-shaped insert fitting that can be inserted into the socket fitting (S11) on the front side of the support post (S1) may be provided on the connecting member (9).
The left and right side walls of the rectangular tube portion (91) form a vertical holding wall portion (911) with both sides facing left and right.
The holding wall portion (911) extends in the vertical direction and has a width that allows the shaft portion (111) of the engagement pin (11) to pass therethrough but cannot pass the head portion (112) of the engagement pin (11). (12) and a plurality of locking grooves (13A) (13B) (13C) (13D) extending forward from a predetermined plurality (four in this case) of height positions including the lower end position in the guide groove (12). And are formed. Each locking groove (13A), (13B), (13C), and (13D) can pass through the shaft portion (111) of the engaging pin (11) as well as the guide groove (12). The width is such that the head (112) cannot pass through. Then, the engagement pin is moved in accordance with the movement of the rear end portion of the support member (8) in the vertical direction according to the predetermined plural (here, four) swing angles of the vertical frame member (3). The shaft portion (111) of (11) can be locked by the edge of the bottom portion of each locking groove (13A) (13B) (13C) (13D). Although the illustrated guide groove (12) extends in the vertical direction, the guide groove (12) may be formed to extend obliquely forward toward the upper side. Further, as shown in FIG. 3, each locking groove (13A), (13B), (13C), and (13D) has a rotation center (center of the connecting shaft) of the front end portion of the support member (8) and each locking groove. (13A) (13B) (13C) (13D) The direction perpendicular to the straight line (X) connecting the center of the shaft part (111) of the engaging pin (11) locked to the edge of the bottom of the bottom (Y ) And the inclination angle is different.
Further, the holding wall (911) is formed with a communication groove (14) that is continuous with the upper end of the guide groove (12) and is bent in a "<" shape toward the front. An introduction hole (15) through which the head (112) of the engagement pin (11) can be passed is formed under the upper end of (14). After passing the head (112) of the engagement pin (11) through the introduction hole (15), the shaft portion (111) of the engagement pin (11) is passed through the communication groove (14) to the guide groove (12). It has become possible. The direction of the communication groove (14) and the arrangement of the introduction holes (15) are not limited to those shown in the drawings, and can be changed as appropriate as long as the above functions can be achieved.

As shown in detail in FIG. 5, at the rear edge of the guide groove (12) in the holding wall portion (911), each locking groove (13A) (13B) (except the lowest locking groove (13D)) is provided. A locking pin drop-out preventing projection (16) projecting toward the opening is formed at a height position substantially corresponding to the center of the width of the opening of 13C). Each protrusion (16) has a mountain shape that gently rises. The height of each projection (16) may be appropriately set within a range that does not hinder the vertical movement of the shaft portion (111) of the engagement pin (11) .For example, the top of each projection (16) and each engagement The distance between the upper edge or the lower edge of the opening of the grooves (13A), (13B), and (13C) is slightly larger than the diameter of the shaft portion (111) of the engagement pin (11).
With the opening and closing operation of the square frame (6) with the face material (7), the shaft portion (111) of the engaging pin (11) is moved to the guide groove (12) and each of the locking grooves (13A) (13B) (13C ), The head (112) of the engagement pin (11) is seen from the left and right direction, and the projections (16) and the locking grooves (13A) (13B) (13C) It overlaps with the upper edge of the opening and / or the lower edge of the opening. Therefore, the size of the head (112) of the engagement pin (11) can be made as small as possible within a range that is larger than the width of the guide groove (12) and each of the locking grooves (13A) (13B) (13C). There is no possibility that the head portion (112) of the engaging pin (11) is rolled and removed at the intersection. Then, by reducing the head portion (112) of the engagement pin (11), the size of the rectangular tube portion (91) constituting the holding wall portion (911) can be made more compact, and as a result, the holding member ( 9) The overall size can be made more compact.

As shown in FIG. 1, inverted U-shaped string attachment portions (32) and (81) are respectively provided at the front end portion of the vertical frame member (3) and the intermediate length portion of the lower surface of the support member (8).
Then, the string (17) having one end attached to the string attaching part (32) of the vertical frame member (3) is held between two adjacent struts (S1) at an upper position than the connecting member (2). The handrail (S4) is hooked from above and hung downward, and the other end of the string (17) is attached to the string attaching part (81) of the support member (8). An operator who rides the string (17) on the tread (S3) can adjust the inclination angle of the square frame (6) with the mesh sheet (7) by pulling it downward or pulling it upward. it can.
During strong winds such as typhoons, the string (17) is operated and the square frame (6) with the mesh sheet (7) is swung to a position where it is closed substantially vertically upward as shown by a two-dot chain line in FIG. In this state, the rectangular frame (6) is fastened to the column by the fixing rope (18). At this time, the shaft portion (111) of the engagement pin (11) is located near the upper end of the guide groove (12) (see FIGS. 3 and 5).

<Second Embodiment>
6 and 7 show a morning glory device (1) for a temporary scaffold according to a second embodiment of the present invention.
The morning glory device (1X) shown in the figure is substantially the same as the morning glory device (1) according to the first embodiment shown in FIGS. 1 to 5 except for the following points.
That is, in the morning glory device (1X) of the second embodiment, the guide groove (12) is an upper portion of each locking groove (13A) (13B) (13C) excluding the lowest locking groove (13D). In addition, when the rectangular frame (6) with the mesh sheet (7) is dropped from the substantially vertically upward state, the shaft portion (111) of the locking pin (11) is connected to each locking groove (13A) (13B) (13C). It has a rearward bent portion (121) that prevents it from entering the camera.
In the morning glory device (1X) for the temporary scaffold described above, since the guide groove (12) has a bent portion (121) in each of the above portions, it is closed substantially vertically upward for curing during a typhoon or the like. Even when the square frame (6) with the mesh sheet (7) in a state of being inadvertently dropped due to loosening of the fixing rope (18), the shaft portion (111) of the locking pin (11) After falling to the lower end of the guide groove (12) without entering the locking grooves (13A) (13B) (13C) other than the lowest from the guide groove (12), the lowest locking groove (13D) And the square frame (6) with the mesh sheet (7) is in the most open state, and the load such as wind pressure acting on the support member (8) is minimized.
Therefore, according to the morning glory device (1X) of the second embodiment, compared to the morning glory device described in Patent Document 1, the load resistance strength of the support member (8) is not increased more than necessary. 7) Deformation and breakage of the support member (8) due to inadvertent dropping of the attached square frame (6) can be reliably prevented.

  The present invention is suitably used as a morning glory device that is installed in a projecting manner on a temporary scaffold and prevents accidents caused by dropping of materials, tools, etc. from the temporary scaffold.

(S): Temporary scaffolding
(S1): Prop
(1) (1X): Morning glory device for temporary scaffold
(2): Connecting member
(3): Vertical frame member
(4): Front horizontal frame member
(5): Rear horizontal frame member
(6): Rectangular frame
(7): Mesh sheet (face material)
(8): Support member
(9): Connecting member
(91): Square tube
(911): Retaining wall
(11): Engagement pin
(111): Shaft
(112): Head
(12): Guide groove
(121): Bending part
(13A) (13B) (13C) (13D): Locking groove
(16): Locking pin dropout prevention protrusion

Claims (2)

A connecting member is attached to each of the predetermined height positions of the front side portions of a plurality of support columns arranged at intervals on the left and right sides of the temporary scaffolding, and the vertical end of each vertical frame member extends in the left-right direction. The front horizontal frame member and the rear horizontal frame member are held between the front end portions and the rear end portions of the two vertical frame members that are rotatably connected to each other and are positioned in front of the two columns that are adjacent to each other on the left and right. In addition, a face material is fastened to a rectangular frame formed by both the vertical frame members, the front horizontal frame member, and the rear horizontal frame member, and the front ends of the rod-shaped support members are arranged at the front ends or intermediate lengths of the vertical frame members. This is a morning glory device for a temporary scaffold in which a holding member for holding a rear end portion of a support member is attached at a position below a connecting member in a front side portion of each column. And
An engagement pin having a horizontal shaft portion extending in the left-right direction and a head portion provided at the tip of the shaft portion is attached to the rear end portion of each support member in a protruding manner,
Each holding member has a vertical holding wall part with both sides facing left and right. The holding wall part can extend vertically and pass the shaft part of the engaging pin, but the head part of the engaging pin can pass through it. And a plurality of locking grooves extending forward from a plurality of predetermined height positions including a lower end position of the guide groove, and a plurality of predetermined swinging angles of the vertical frame member. In accordance with the position of the rear end portion of the support member moving in the vertical direction, the shaft portion of the engagement pin can be locked by the edge of the bottom portion of each locking groove,
On the rear side edge of the guide groove in the holding wall portion, a locking pin protruding toward the opening at a height position substantially corresponding to the center of the width of each locking groove except for the lowest locking groove A morning glory device for a temporary scaffold, in which a drop-off preventing projection is formed.   The guide groove has an upper portion of each locking groove except for the lowest locking groove, and when the rectangular frame with the face material drops from a substantially vertical upward state, the shaft portion of the locking pin is in each locking groove. The morning glory device for a temporary scaffold according to claim 1, further comprising a backward bent portion that prevents entry.

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