JP7441712B2 - Wedge fastening device in scaffolding - Google Patents

Description

The present invention relates to a wedge fastening device used on scaffolds such as temporary scaffolds.

Conventionally, wedge fastening devices have been provided in temporary scaffolding for construction and dismantling. For example, as shown in FIG. 1, as a device for removably connecting a column 1 and a connecting member 2 such as a horizontal member, a fastener provided on a flange 3 fixed at intervals in the longitudinal direction of the column 1 is used. A wedge fastening device is known in which a connecting metal fitting 5 fixed to an end of a connecting member 2 is tightly connected to a hole 4 by a wedge member 6.

The connecting fitting 5 has a receiving part 9 formed between the upper and lower jaw parts 5a and 5b, and an upper insertion hole 7 and a lower insertion hole 8 in the upper and lower jaw parts 5a and 5b, respectively. When the flange 3 is advanced, the fastening hole 4 of the flange and the insertion holes 7 and 8 of the upper and lower jaw parts are formed to communicate in the vertical direction.

The wedge member 6 is formed of a disc-shaped member having a thickness that allows it to be inserted into each of the holes described above, and is formed so that the width between the abdomen 6a and the back portion 6b becomes gradually narrower downward.

Therefore, while the wedge member 6 is inserted from top to bottom through the insertion hole 7 of the upper jaw part 5a, the fastening hole 4 of the flange 3, and the insertion hole 8 of the lower jaw part 5b, it is struck with a hammer or the like to move it downward. Then, the wedge member 6 is press-fitted between the connecting edge 4a of the fastening hole 4 and the receiving edges 7a, 8a of the insertion holes 7, 8, and presses the gap between the connecting edge 4a and the receiving edges 7a, 8a. By pushing the connecting fitting 5 while expanding, the tips of the upper and lower jaw parts 5a, 5b are pressed against the surface of the support column. As a result, the flange 3, the wedge member 6, the connecting fitting 5, and the support column 1 can be tightly connected to each other.

In this tightened state, when the lower end of the wedge member 6 inserted through the insertion hole 8 of the lower jaw portion 5b is struck with a hammer or the like and moved upward, the tightened state is released.

Japanese Patent Application Publication No. 2018-71196

In order to perform the above-mentioned tightening work, first, the connecting fitting 5 is moved laterally toward the flange 3 from a state facing the side of the flange 3, the flange 3 is entered into the receiving part 9, and the upper jaw is moved. It is necessary to place the mounting surface 10 of the portion 5a on the flange 3. However, if the wedge member 6 is located inside the receiving part 9 at this time, the flange 3 cannot enter the receiving part 9. Therefore, as shown in FIG. 1(A), the receiving part 9 is opened by lifting the wedge member 6 to the retracted position PX with the fingertips of the operator, and the connecting fitting 5 is opened while the wedge member 6 is held. It must be moved towards flange 3.

When the flange 3 is advanced into the receiving part 9 and the wedge member 6 is released from being held by a fingertip, etc. with it facing the fastening hole 4 of the flange, the wedge member 6 descends under its own weight and stops at the stop position PY. Therefore, it is sufficient to continue to move it down to the tightening position PZ by hitting it with a hammer or the like.

Construction of scaffolding requires tying work at numerous locations. Since the connecting fitting 5 constitutes a heavy object that is integrated with the connecting member 2, it is hard work to position it so that it faces the flange 3 and move it laterally. Continuing to hold the member 6 in the lifted position at the retracted position PX is harsh on the operator.

The same applies to the case of dismantling a scaffold, and it is necessary to lift the wedge member 6, which has been released from the tightened state, to the retreat position PX and maintain the lifted state until the flange 3 is extracted from the receiving part 9 of the connecting fitting 5. .

By the way, in order to solve the above problem, for example, a spring for holding the wedge member is provided in the connecting metal fitting, and the operator moves the wedge member up and down against the elastic force of the spring with his or her fingertip, and the above-mentioned operation is performed. The wedge member may be configured so that it is stopped and held at the retracted position even if it is released from the fingertip in a state where it is located at the retracted position PX.

However, in this case, the above problem can be solved, but if the wedge member is held in the retracted position, when the upper jaw part of the connecting fitting is placed on the flange, the upper jaw part is placed on the flange before driving the wedge member. The surface may slide on the upper surface of the flange and fall off the flange. In particular, in the case of long and heavy connecting members, it is difficult to place both ends of the connecting member on the flanges of a pair of struts at the same time, so first attach the connecting fittings at one end to the other. The procedure is to place the connecting metal fitting on the other end on the flange of This causes a new problem in that it easily falls off and reduces work efficiency.

In the present invention, when the flange is inserted into the receiving part of the connecting fitting, the wedge member is kept stationary at the standby position P1, and at that time, the lower end of the wedge member is moved downward by a predetermined distance (t) from the mounting surface of the upper jaw part. When the protruding position is set as the standby position P1 and the mounting surface of the maxillary part of the connecting fitting is placed on the flange, the lower end of the wedge member is inserted and locked into the tightening hole of the flange. To provide a wedge fastening device that prevents a mounting surface from sliding on the upper surface of a flange and prevents it from falling off the flange.

Therefore, the first means of the present invention is a fastening device that connects a flange fixed to a support and a connecting fitting fixed to a connecting member by a wedge member, and the connecting fitting is connected to the upper jaw part. A receiving part is formed between the upper jaw part and the lower jaw part to allow the flange to enter, and a mounting surface is formed on the lower surface of the upper jaw part. With the mounting surface of the upper jaw part placed on the flange that has entered the receiving part, the wedge main body is driven into the tightening hole of the flange and moved down to the tightening position (P2). With respect to the vertical movement position, the wedge member has a standby position (a position where the lower end of the wedge body protrudes a distance (t) from the mounting surface toward the inside of the receiving part). P1), and the position where the lower end is flush with the placement surface of the maxillary part is the retracted position (P0), a guide part is formed at the lower end, and the wedge member is set at the standby position (P1). When the flange is advanced toward the receiving part in this state, the guide part abuts on the edge of the flange and moves, thereby retracting the wedge member toward the retracted position (P0). The connecting fitting is provided with a holding means having an elastic holding part facing the branch part of the wedge member, and the branch part has a floating area facing the elastic holding part, and a stopper at a predetermined position of the floating area. The floating region and the elastic holding portion are configured to allow the wedge member to move downward from the retracted position (P0) toward the standby position (P1) due to its own weight, and the stopper portion The elastic holding part holds the wedge member stationary at the standby position (P1) by placing the stopper part on the elastic holding part, and when a downward external force is applied to the wedge member from the resting state, the stopper part elastically stops the wedge member. It is configured to pass through by elastically deforming the holding portion and move the wedge member downward toward the tightening position (P2).

Preferably, the distance (t) is configured such that t<T with respect to the thickness (T) of the flange.

In a preferred embodiment, when the wedge member is in the standby position (P1), the height (h) of the space between the lower end of the wedge body and the lower jaw is determined such that T≦h with respect to the thickness (T) of the flange. The lower end distance (g) and the upper distance (e) constituting the protrusion distance (t) of the lower end protruding downward from the mounting surface are configured so that e<g. The guide portion is formed in the region included in the lower distance (g) of the lower end portion, the locking portion is formed in the region included in the upper distance (e), and the wedge member is moved to the standby position (P1). When the mounting surface of the maxillary part is placed on the flange, the locking part locks into the fastening hole of the flange, thereby preventing the maxillary part from moving laterally.

The guide portion may be formed at the lower end of the wedge main body by a conical surface that is approximately conical toward the center of the lower end, or may be formed by a spherical surface that is approximately spherical.

Preferably, when the wedge member is moved between the tightened position (P2) and a disassembled position (P3) in which the lower end of the wedge body is moved above the mounting surface of the upper jaw, the branch part is always inserted through a guide hole in the mandibular part, and the wedge member is further moved upward from the dismantling position (P3) by abutting the retaining means provided at the lower end of the branch part against the guide hole. The branch portion forms a lower region that is held in elastic contact with the elastic holding portion of the holding means below the floating region, and the lower region and the elastic holding portion are arranged in a wedge shape. When the member is moved upward to the dismantled position (P3), the lower region is held by the elastic holding portion to prevent the wedge member from moving downward from the disassembled position (P3) due to its own weight.

In the configuration in which a hollow part is formed at the base of the connecting fitting in which the upper and lower jaw parts extend, and an opening opening toward the tail end part is formed, the holding means is formed by bending a metal plate. a square tube portion through which the branch portion of the wedge member is inserted; an elastic holding portion formed by a pair of spring pieces extending from the square tube portion and holding both side surfaces of the branch portion; and the square tube portion. It is preferable to include a mounting portion that extends from the opening and is self-retained within the opening.

Further, a second means of the present invention is a fastening device that connects a flange fixed to a support and a connecting fitting fixed to a connecting member by a wedge member, and the connecting fitting is connected to the upper jaw part. A receiving part is formed between the upper jaw part and the lower jaw part to allow the flange to enter, and a mounting surface is formed on the lower surface of the upper jaw part. With the mounting surface of the upper jaw part placed on the flange that has entered the receiving part, the wedge main body is driven into the tightening hole of the flange and moved down to the tightening position (P2). In the configuration in which the wedge member is tightened by the vertical movement position, the wedge member is set at a standby position (P1) at a position where the lower end of the wedge body protrudes downward by a distance (t) from the placement surface of the upper jaw. The height (h) of the space between the downwardly protruding lower end and the lower jaw is configured such that T<h with respect to the thickness (T) of the flange, and the connecting fitting includes: A holding means having an elastic holding portion facing a branch portion of the wedge member is provided, and the elastic holding portion and the branch portion constitute a stationary means for positioning and stopping the wedge member at a standby position (P1). By placing the mounting surface of the upper jaw part on the flange with the flange entering the receiving part through the space set at the height (h) by keeping the member stationary at the standby position (P1). , the lower end of the wedge main body is configured to be inserted and locked into the fastening hole of the flange.

Preferably, the distance (t) is configured such that t<T with respect to the thickness (T) of the flange.

In a preferred embodiment, the stationary means includes a swing area of the branch part formed to move downward in a state facing the elastic holding part due to the weight of the wedge member, and a stopper part formed above the swing area. When the wedge member is placed in the standby position (P1), the stopper part supports the weight of the wedge member by being placed on the elastic holding part from above, but does not apply a downward external force to the branch part. When applied, the elastic holding portion is elastically deformed to allow the wedge member to pass downwardly, thereby moving the wedge member downward toward the tightening position (P2).

Preferably, the stationary means is constituted by a stationary area formed in the branch, and when the wedge member is positioned at the standby position (P1), the elastic holding part is controlled by the stationary area, so that the wedge member is made to stand still against its own weight, but when an external force in the vertical direction is applied to elastically deform the elastic holding part, the stationary region is configured to cause the elastic holding part to slide.

According to the present invention configured by the above first means, the wedge member 16 is moved from the standby position (P1) by simply moving the connecting fitting 15 toward the flange 13 and entering the flange 13 into the receiving portion 20. By automatically retracting toward the retracted position (P0), the flange 13 is suitably advanced, and simply by moving the connecting fitting 15 to a predetermined position on the flange 13, the wedge member 16 is moved from the retracted position (P0). The connecting fitting 15 is prevented from falling off from the flange 13 by automatically returning to the standby position (P1) and inserting and locking the lower end portion 25e into the fastening hole 14 of the flange 13.

According to the present invention configured by the above second means, when moving the connecting fitting 15 toward the flange 13, the lower end portion 25e of the wedge member 16 that is kept stationary at the standby position (P1) After the flange 13 enters the receiving part 20 through a space with a height (h), if the mounting surface 30 of the upper jaw part 18 is placed on the flange 13, the lower end part 25e will tighten the flange 13. Since the connecting fitting 15 is inserted and locked into the hole 14, the connecting fitting 15 is prevented from falling off from the flange 13.

Therefore, according to the present invention, the work of connecting the wedged connecting fittings 15, 15 provided at both ends of the elongated connecting member 12 to the flanges 13 of the struts 11 erected at predetermined intervals is simplified. It is simple and easy, and has the effect of preventing the connecting fitting 15 from falling off the flange 13 during work.

The conventional art is shown in which (A) is a sectional view showing a state in which a flange has entered a receiving portion of a connecting fitting, and (B) is a sectional view showing a tightened state after a wedge member is driven. FIG. 3 is a perspective view of the first embodiment of the present invention showing the connecting fitting, the holding means, and the wedge member in a separated state. FIG. 2 is a side view showing a cross section of a connecting fitting equipped with a holding means and showing a wedge member separated in the first embodiment; The method of attaching the holding means is shown, (A) is a perspective view from the front showing the state before the holding means is inserted toward the connecting fitting, and (B) is a perspective view showing the state after the holding means is inserted from the front side. FIG. The mounting method of the holding means is shown, (A) is a perspective view from the back side showing the state before the holding means is inserted toward the connecting fitting, and (B) is a perspective view showing the state after the holding means is inserted from the back side. FIG. (A) is a longitudinal cross-sectional view showing the cross-sectional shape of the branch portion of the wedge member, and (B) is a vertical cross-sectional view showing the cross-sectional shape of the branch portion of the wedge member. (C) is a longitudinal cross-sectional view showing a state in which the free region of the branch is pinched; (C) is a longitudinal cross-sectional view showing the free region of the branch in a state where the wedge member is located at the retracted position (P0) and the free region of the branch is pinched by the elastic holding part of the holding means; (D) is a vertical cross-sectional view showing a state in which the elastic holding portion of the holding means elastically holds the lower region of the branch portion. FIG. 6 is a cross-sectional view showing the connecting fitting and the flange of the support column when the wedge member is stationary at the standby position (P1). The relationship between the branch part of the wedge member stationary at the standby position (P1) and the elastic holding part of the holding means is shown, with (A) being a perspective view and (B) being a longitudinal sectional view. FIG. 3 is a cross-sectional view showing the connecting fitting and the flange of the support post with the wedge member retracted to the retracted position (P0). The relationship between the branch part of the wedge member retracted to the retracted position (P0) and the elastic holding part of the holding means is shown, with (A) being a perspective view and (B) being a longitudinal sectional view. FIG. 7 is a cross-sectional view showing the connecting fitting and the flange of the support post in a state where the wedge member descends from the retracted position (P0) to the standby position (P1) and comes to rest, so that its lower end is locked in the fastening hole. It shows the relationship between the branch of the wedge member that has descended from the retracted position (P0) to the standby position (P1) and is stationary, and the elastic holding part of the holding means, where (A) is a perspective view and (B) is a longitudinal cross-sectional view. . FIG. 3 is a cross-sectional view showing the connecting fitting and the flange of the support column in a state where the wedge member is moved down to the tightening position (P2). The relationship between the branch portion of the wedge member that has been moved down to the tightening position (P2) and the elastic holding portion of the holding means is shown, with (A) being a perspective view and (B) being a longitudinal sectional view. FIG. 3 is a sectional view showing the connecting fitting and the flange of the support post with the wedge member moved upward to the dismantled position (P3). The relationship between the branch portion of the wedge member that has been moved upward to the disassembly position (P3) and the elastic holding portion of the holding means is shown, with (A) being a perspective view and (B) being a longitudinal sectional view. Regarding the second embodiment of the present invention, (A) is a perspective view showing a wedge member and a holding means, (B) is a perspective view of the wedge member seen from below, and (C) is an enlarged perspective view of the holding means. FIG. 7 is a cross-sectional view showing the connecting fitting and the flange of the support column in a state where the wedge member is stationary at the standby position (P1) in the second embodiment. The relationship between the branch part of the wedge member stationary at the standby position (P1) and the elastic holding part of the holding means is shown, with (A) being a perspective view and (B) being a longitudinal sectional view. It shows the relationship between the connecting fitting and the flange of the column when the wedge member is stationary at the standby position (P1), and (A) is a cross-sectional view showing the lower end of the wedge main body protruding toward the receiving part and the flange; (B) is a sectional view showing a guide part and a locking part formed at the lower end of the wedge main body. FIG. 7 is a cross-sectional view showing a state in which the coupling fitting is moved toward the flange of the support column with the wedge member stationary at the standby position (P1), and the flange is brought into contact with the lower end of the wedge main body. FIG. 7 is a plan view showing a state in which the coupling fitting is moved toward the flange of the support column with the wedge member stationary at the standby position (P1), and the flange is brought into contact with the lower end of the wedge main body. FIG. 3 is a cross-sectional view showing the connecting fitting and the flange of the support post with the wedge member retracted to the retracted position (P0). The relationship between the branch part of the wedge member retracted to the retracted position (P0) and the elastic holding part of the holding means is shown, with (A) being a perspective view and (B) being a longitudinal sectional view. FIG. 7 is a cross-sectional view showing the connecting fitting and the flange of the support post in a state where the wedge member descends from the retracted position (P0) to the standby position (P1) and comes to rest, so that its lower end is locked in the fastening hole. It shows the relationship between the branch of the wedge member that has descended from the retracted position (P0) to the standby position (P1) and is stationary, and the elastic holding part of the holding means, where (A) is a perspective view and (B) is a longitudinal cross-sectional view. . FIG. 3 is a cross-sectional view showing the connecting fitting and the flange of the support column in a state where the wedge member is moved down to the tightening position (P2). The relationship between the branch portion of the wedge member that has been moved down to the tightening position (P2) and the elastic holding portion of the holding means is shown, with (A) being a perspective view and (B) being a longitudinal sectional view. FIG. 3 is a cross-sectional view showing the connecting fitting and the flange of the support column in a state where the wedge member has been moved upward to the dismantled position (P3). The relationship between the branch portion of the wedge member that has been moved upward to the disassembly position (P3) and the elastic holding portion of the holding means is shown, with (A) being a perspective view and (B) being a longitudinal sectional view. FIG. 7 is a cross-sectional view showing the connecting fitting and the flange of the support column when the wedge member is stationary at the standby position (P1) according to the third embodiment of the present invention. Regarding the third embodiment , the operation when placing the mounting surface of the upper jaw part on the flange is shown, and (A) is a state in which the flange is entered into the receiving part through the lower space of the lower end of the wedge member. (B) is a sectional view showing the mounting surface of the upper jaw part placed on the flange. FIG. 7 is a cross-sectional view showing the connecting fitting and the flange of the support column in a state where the wedge member is stationary at the standby position (P1) regarding the fourth embodiment of the present invention. Regarding the fourth embodiment, the mutual relationship between the stationary region of the branch and the holding part of the elastic holding means is shown, with (A) being a perspective view and (B) being a longitudinal sectional view. Regarding the fourth embodiment, it shows the action when placing the mounting surface of the upper jaw part on the flange, and (A) shows the action when the flange is entered into the receiving part through the space below the lower end of the wedge member. (B) is a sectional view showing a state in which the mounting surface of the upper jaw part is placed on the flange.

Preferred embodiments of the present invention will be described in detail below based on the drawings.

<First embodiment>
1 to 16 show a first embodiment of the invention.

(Basic configuration)
As shown in the figure, the wedge fastening device is a device for removably connecting a support 11 and a connecting member 12 such as a horizontal member in a temporary scaffold, for example, and is a device that is fixed at intervals in the longitudinal direction of the support 11. A connecting fitting 15 fixed to the end of the connecting member 12 is tightly connected to a connecting hole 14 provided in the flange 13 by a wedge member 16.

The connecting fitting 15 has an upper jaw part 18 and a lower jaw part 19 extending from a base part 17 fixed to the connecting member 12, thereby forming a receiving part 20 between the upper and lower jaw parts. An upper insertion hole 21 and a lower insertion hole 22 are provided, and when the flange 13 is inserted into the receiving part 20, the tightening hole 14 of the flange communicates with the insertion holes 21 and 22 of the upper and lower jaw parts in the vertical direction. It is formed like this. Note that contact parts 18a and 19a formed by arcuate surfaces along the circumferential surface of the support column 11 are provided at the tips of the upper jaw part 18 and the lower jaw part 19.

The wedge member 16 is formed of a disk-shaped body having a thickness that can be inserted into each of the holes 21, 14, and 22, and a vertically intermediate portion constitutes a wedge portion 23, and a head portion is provided above and below the wedge portion 23. 24 and leg portions 25, and the wedge portion 23 is formed so that the width between the abdomen 23a and the back portion 23b becomes gradually narrower downward. At this time, the abdomen 23a is formed to be substantially parallel to the axis of the support column 11, and the back part 23b is formed to be inclined with respect to this. The head 24 is formed into a block shape that is thicker than the legs 25.

As will be described later, the flange 13 is inserted into the receiving part 20 of the connecting fitting 15, and the insertion holes 21 and 22 of the upper and lower jaw parts 18 and 19 are exposed above and below the fastening hole 14 of the flange, and the wedge member 16 is inserted into these holes. When the wedge member 16 is inserted from top to bottom and moved downward by hitting with a hammer or the like, the wedge member 16 connects the connecting and supporting edge 14a of the fastening hole 14 and the receiving edges 21a and 22a of the insertion holes 21 and 22. By moving the connecting fitting 15 forward toward the column 11 while expanding the distance between the contacting edge 4a and the receiving edges 21a and 22a, the contacting portion of the upper and lower jaw portions 18 and 19 is 18a and 19a are brought into contact with the surface of the support column 11 in a press-contact state. As a result, the flange 13, the wedge member 16, the connecting fitting 15, and the support column 11 are tightly connected to each other.

Then, when the wedge member 16 is moved upward from this tightened state by hitting with a hammer or the like, the tightened state is released.

The basic configuration described above is generally similar to the configuration of the prior art described above, so an embodiment embodying the features of the present invention will be described below.

As shown in FIGS. 2 and 3, the connecting fitting 15 has a hollow part 26 adjacent to the receiving part 20 formed inside the base part 17, and an opening that opens from the hollow part 26 toward the tail end. A portion 27 is provided, and an upper guide hole 28 and a lower guide hole 29 are provided above and below the cavity portion 26.

The receiving portion 20 is divided from above and below by a placement surface 30 formed on the lower surface of the upper jaw portion 18 and an upper surface of the lower jaw portion 19, and is located at the back of the receiving portion 20 and has a placement surface 30 formed on the lower surface of the lower jaw portion 19. A receiving portion 31 facing downward is formed.

The wedge member 16 includes a head portion 24 and a leg portion 25, a wedge body portion 16A that is inserted through the leg portions 25 into the insertion holes 21 and 22, and a branch portion 16B that is inserted into the guide holes 28 and 29. They are installed side by side and integrated. Note that the wedge main body portion 16A and the branch portion 16B are integrated via a horizontal connecting portion 16C that interconnects the upper end portions of the leg portion 25 and the branch portion 16B, and the entire wedge member 16 is formed by forging or the like. ing.

(Configuration of holding means)
A holding means 32 is provided in the hollow part 26 of the connecting fitting 15. The holding means 32 is formed by bending a plate spring, and includes a square tube portion 33 through which the branch portion 16B of the wedge member 16 is inserted between the upper and lower guide holes 28 and 29, and a square tube portion 33 extending from the square tube portion 33. elastic holding parts 34, 34 formed by a pair of tongue pieces facing both sides of the branch part 16B; and a mounting part extending from the square tube part 33 and self-retained inside the opening 27 of the base part 17. It is equipped with 35.

As shown in FIGS. 4 and 5, the mounting portion 35 is formed by a pair of wing pieces 36, 36 arranged in a V shape so that the interval gradually increases in the extending direction from the rectangular tube portion 33, The wing piece 36 has straight edge portions 36a and 36b on the upper and lower sides. On the other hand, the opening 27 of the base 17 forms upper and lower flat surfaces 27a and 27b.

As a result, the holding means 32 allows the straight edges 36a, 36b of the wing pieces 36 to align with the flat surfaces 27a, 27b of the opening 27 by inserting the attachment part 35 from the cavity 26 toward the opening 27. It will be installed stably in the same condition. As will be described later, since the branch part 16B of the wedge member 16 is inserted into the square tube part 33, the holding means 32 does not require any fixing means such as screws for attachment, and the holding means 32 can be attached to the hollow part 26 by itself. Retained.

(Configuration of wedge member)
The wedge member 16 is configured such that the leg portion 25 of the wedge main body portion 16A can be freely inserted into the upper and lower insertion holes 21 and 22, and the branch portion 16B is inserted into the upper and lower guide holes 28 and 29 and the square tube portion 33 of the holding means 32. A retaining means 43 is formed by the head of a rivet inserted into the lower end of the branch portion 16B.

Therefore, the wedge member 16 can be lowered to a position where the connecting portion 16C enters between the upper insertion hole 21 and the guide hole 28 (see FIG. 13), and the wedge member 16 cannot be pinched by the operator's fingertips. This means that the retaining means 43 can be raised to a position where it contacts the edge of the lower guide hole 29 (see FIG. 15).

Regarding the vertical movement position, the wedge member 16 has a retracted position (P0) (see FIG. 9) where the lower end 25e of the leg 25 is flush with the placement surface 30 of the upper jaw 18 (see FIG. 9), and the lower end The position where the part 25e is projected downward by a distance (t) from the mounting surface 30 is defined as a standby position (P1) (see FIGS. 7 and 11), and the part 25e is moved downward from the standby position and driven into the fastening hole 14 of the flange 13. The tightened position is defined as the tightened position (P2) (see FIG. 13), and the retaining means 43 is in contact with the edge of the lower guide hole 29, with the lower end 25e being above the mounting surface 30. The position moved to is defined as the dismantling position (P3) (see FIG. 15).

A guide portion 38 is formed at the lower end portion 25e of the wedge main body portion 16A that projects downward from the mounting surface 30 when the wedge body portion 16A is in the standby position (P1) (see FIG. 7). As will be described later, the guide portion 38 constitutes a guide surface that comes into contact with the edge of the flange 13 and guides it in the riding direction when the connecting fitting 15 is moved toward the flange 13. Therefore, it is formed at a position where the edge of the flange 13 comes into contact. Therefore, the guide portion 38 is preferably formed over the entire downwardly projecting distance (t), but may be formed only near the tip of the lower end portion 25e. In the first embodiment, the guide portion 38 is formed of an arcuate surface in the illustrated example, but it may be formed of an inclined surface.

Regarding the standby position (P1), as shown in FIG. The downward protruding distance (t) is configured such that T>t. In the illustrated embodiment, the height (h) of the space between the lower end 25e of the wedge main body 16A and the lower jaw 19 is configured such that T<h with respect to the thickness (T) of the flange 13. However, the configuration may be such that h<T<h+t.

(Composition of branches)
As shown in FIG. 6(A), the branch portion 16B of the wedge member 16 is located at an intermediate portion in the vertical direction and has a floating region 40 formed thinly as shown by (W1) in the width direction. (L), a stopper portion 37 formed as a downwardly convex step is provided at the upper end of the floating region 40, and a holding receiving portion 39 formed as an upwardly convex step is provided at the lower end. ing. An upper region 41 having a thickness (W2) thicker than the wall thickness (W1) of the floating region 40 is formed above the stopper portion 37, and a thickness of the floating region 40 is formed below the holding receiving portion 39. A lower region 42 having a thickness (W3) thicker than the thickness (W1) is formed.

As shown in FIGS. 6(B) and 6(C), when the wedge member 16 is located at the standby position (P1) and the retracted position (P0), the branch portion 16B inserted into the square tube portion 33 of the holding means 32 In this case, the floating region 40 is held by the elastic holding parts 34, 34 so as to be vertically movable. “Pinching” means that the elastic holding portions 34 face the floating area 40 so that the holding force F1 of the elastic holding portions 34, 34 is small or exerts a holding force against the falling force G due to the wedge member 16's own weight. In other words, a state in which the falling force G cannot be received between the elastic holding portion 34 and the floating region 40 is a state in which the falling force G cannot be received. Therefore, the elastic holding parts 34, 34 face the surface of the floating area 40 through the gap, and by bringing the stopper part 37 into contact with the elastic holding part 34 in a placed state, the wedge member 16 It may also be configured to stand still.

Therefore, as shown in FIG. 6(B), the branch portion 16B descends due to its own weight, but when the stopper portion 37 contacts the elastic holding portion 34 while being placed on the elastic holding portion 34, the branch portion 16B descends due to its own weight. The wedge member 16 is configured to be stopped when the wedge member 16 is received, and the received position is set as a standby position (P1).

Therefore, as shown in FIG. 6(C), when the operator applies a pulling force U that exceeds the falling force G by pinching the wedge member 16 with his or her fingertips, the branch portion 16B also receives resistance from the elastic holding portion 34. Moves up easily without any hassle. FIG. 6C shows a state in which the wedge member 16 has been moved upward to the retracted position (P0), and the holding receiving part 39 is brought close to or in contact with the elastic holding part 34.

However, when the pulling force (U) is released from the retracted position (P0), the wedge member 16 descends due to the falling force G, and the stopper part 37 comes into contact with the elastic holding part 34, so that the wedge member 16 is in the standby state. It stops at position (P1) and is made to stand still.

In order to be elastically deformed, the elastic holding portion 34 passes through the stopper portion 37 when a strong downward force is applied to the branch portion 16B, and passes through the holding receiving portion when a strong upward force is applied to the branch portion 16B. 39 is configured to pass therethrough.

Therefore, when the head 24 of the wedge member 16 which is stationary at the standby position (P1) is strongly pressed down by hitting with a hammer or the like, the stopper part 37 passes through the elastic holding part 34 by pushing it apart, thereby tightening the wedge member 16. It moves downward toward position (P2). At this time, the elastic holding portion 34 elastically holds the thick (W2) upper region 41, but the present invention is not limited by this point.

When the lower end of the branch portion 16B of the wedge member 16 which is in the tightened state at the tightening position (P2) is pushed up strongly by hitting with a hammer or the like, the holding receiving portion 39 moves to the elastic holding portion 34 as shown in FIG. 6(D). The wedge member 16 is moved toward the dismantling position (P3). At this time, the elastic holding portion 34 elastically holds the lower region 42. Although this point is a preferred configuration of the present invention, it is not necessarily limited thereto. Note that "elastic holding" means that the wedge member 16 is held in a stopped state at the dismantling position (P3) by being pushed apart to generate a holding force F2 that exceeds the falling force G.

(effect)
Hereinafter, the operation of the fastening device according to the first embodiment configured as described above will be explained.

(Preliminary process)
Prior to connecting the connecting fitting 15 to the flange 13, the wedge member 16 is positioned at a standby position (P1), as shown in FIGS. 7 and 8.

At this time, if the wedge member 16 is moved to the upper position or lower position to a greater extent than the standby position (P1), the lower region 42 or the upper region 41 of the branch portion 16B is held by the elastic holding portion 34 of the holding means 32. When it is held, if the operator moves it by pushing it downward or upward with his or her fingers, as soon as the free region 40 comes to a position facing the elastic holding part 34, the elastic holding part 34 will be released from the elastically deformed state. Since it returns to its original normal state, its position can be sensed with the touch of your fingertips.

In this state, the wedge member 16 is freely movable up and down within the range of the vertical distance (L) of the floating area 40, but due to its own weight, the wedge member 16 comes into contact with the elastic holding part 34 while being placed on it. It is stationary, and the lower end portion 25e of the leg portion 25 in the wedge main body portion 16A projects downward from the mounting surface 30 by a distance (t).

(Placement process)
In order to perform the tightening work, the connecting fitting 15 is moved laterally toward the flange 13 from the side facing the flange 13, the flange 13 is entered into the receiving part 20, and the mounting surface of the upper jaw part 18 is moved. The process of mounting 30 on flange 13 is shown in FIGS. 9 and 10.

As shown in FIG. 7, with the wedge member 16 positioned at the standby position (P1), the connecting fitting 15 is moved toward the flange 13, and the edge of the flange 13 is caused to enter the receiving portion 20. At this time, the wedge member 16 is configured such that the free movement region 40 of the branch portion 16B is movable relative to the elastic holding portion 34 of the holding means 32 as described above.

The wedge member 16 has the lower end 25e of the wedge main body 16A located at a position that prevents the edge of the flange 13 from entering the receiving portion 20, but the guide portion 38 It comes into contact with the edge and is guided in the direction of riding.

Therefore, as shown in FIGS. 9 and 10, by being brought into contact with the edge of the flange 13, the wedge member 16 moves from the standby position (P1) to the retracted position ( P0), the mounting surface 30 can be slid to a predetermined position while being mounted on the upper surface of the flange 13.

Therefore, when the lower end portion 25e of the wedge member 16 located at the retracted position (P0) faces the fastening hole 14 of the flange 13, the wedge member 16 descends due to its own weight, and as shown in FIGS. The holding receiving part 37 stops again at the position where it contacts the elastic holding part 34, that is, the standby position (P1), and is made to stand still.

In this way, by simply moving the connecting fitting 15 toward the flange 13 and entering the flange 13 into the receiving portion 20, the wedge member 16 is automatically retracted from the standby position (P1) to the retracted position (P0). By doing so, the flange 13 is suitably advanced, and by simply moving the connecting fitting 15 to a predetermined position, the wedge member 16 automatically returns from the retracted position (P0) to the standby position (P1) again, and the lower end portion 25e By inserting and locking into the fastening hole 14 of the flange 13, the connecting fitting 15 is prevented from falling off from the flange 13.

Therefore, the work of connecting the wedged connecting fittings 15, 15 provided at both ends of the elongated connecting member 12 to the flanges 13 of the columns 11 erected at predetermined intervals becomes simple and easy. It is possible to prevent the connecting fitting 15 from falling off the flange 13 during work at high places, and furthermore, it is possible to avoid the danger of falling to the ground together with the connecting member 12.

(Tightening process)
After the connecting fitting 15 is placed on the flange 13 as described above and the lower end 25e of the wedge member 16 is inserted and locked into the fastening hole 14, the head of the wedge member 16 that is stationary at the standby position (P1) When the portion 24 is strongly pressed down by hitting with a hammer or the like, the wedge member 16 moves downward to the tightened position (P2) and forms the tightened state, as shown in FIGS. 13 and 14.

At this time, the stopper part 37 elastically deforms the elastic holding part 34 so that the branch part 16B passes through and moves downward while being spread apart, and is elastically held in the upper region 41 by the elastic holding part 34.

(Demolition process)
When the connecting fitting 15 is to be removed from the flange 13 when dismantling the constructed temporary scaffold, as shown in FIGS. 15 and 16, the lower end of the branch 16B protruding downward from the lower guide hole 29 is When pushed up strongly by hitting with a hammer or the like, the retaining means 43 at the lower end moves upward until it comes into contact with the edge of the lower guide hole 29, and the wedge member 16 is moved to the dismantling position (P3). As a result, the lower end 25e of the wedge main body 16A is pulled out from the fastening hole 14 of the flange 13 and is located above the mounting surface 30, so that the connecting fitting 15 can be separated from the flange 13.

At this time, the holding receiving part 39 elastically deforms the elastic holding part 34 so that the branch part 16B passes and moves upward while being spread apart, and is elastically held in the lower region 42 by the elastic holding part 34. Therefore, when separating the connecting fitting 15 from the flange 13, the wedge member 16 does not fall under its own weight and lock the lower end 25e in the fastening hole 14, which prevents the separating operation from being obstructed, making the dismantling operation easier. do.

Note that when the wedge member 16 is held in the dismantled position (P3) and the connecting fittings 15 are to be connected to the flange 13 again to construct a scaffold, the operator must use his/her hands or fingers as described above. By simply pushing the wedge member 16 downward and moving it, it can be easily stopped at the standby position (P1) and the connection work can be started.

<Second embodiment>
17 to 30 show a second embodiment of the invention.

Among the technical configurations of the second embodiment, the "basic configuration" described in connection with the first embodiment is generally the same in the second embodiment, so similar components are shown with the same reference numerals, and the same components as described above are illustrated. Duplicate explanations will be omitted by referring to the explanations.

As shown in FIGS. 17(A) and 17(B), the wedge member 16 includes a wedge main body 16A including a head 24 and legs 25, and a branch 16B that are integrated via a horizontal connecting portion 16C. , this point is similar to the first embodiment, but differs from the first embodiment in the configuration regarding the lower end portion 25e of the leg portion 25 of the wedge main body portion 16A and the configuration regarding the side surface of the branch portion 16B.

As shown in FIG. 17(B), the lower end 25e of the wedge main body 16A is provided with a guide portion 38 formed by a substantially conical surface extending toward the center of the lower end. Thereby, the guide portion 38 is provided around the entire circumference of the lower end portion 25e. Note that the guide portion 38 may be formed of a substantially spherical spherical surface instead of a conical surface.

Further, the branch portion 16B of the wedge member 16 is formed to have a predetermined wall thickness in the width direction as shown by (w1), thereby forming a floating region 40 extending in the vertical direction on the side surface of the branch portion 16B, Guide ribs 46, 46 are formed on both sides of the floating area 40. A stopper portion 37 formed by a horizontal rib connecting the guide ribs 46, 46 is provided at a predetermined position in the floating region 40. Therefore, the wall thickness (w2) in the width direction including the stopper portion 37 satisfies w2>w1 with respect to the floating region 40 having the wall thickness (w1), and the stopper portion 37 forms a convex portion. As a result, the floating region 40 is divided into an upper region 41 and a lower region 42 that extend above and below the stopper portion 37.

As shown in FIGS. 17(A) and 17(C), the holding means 32 is formed by bending a plate spring to form a square tube part 33, a pair of tongue-shaped elastic holding parts 34, 34, and a mounting part 5. This is similar to the first embodiment in that it is inserted into the hollow part 26 of the connecting fitting, but the regulating part 33a is formed by bending the front wall of the square tube part 33 inward. This point is different from the first embodiment. When the branch part 16B of the wedge member 16 is inserted into the square tube part 33, the regulating part 33a comes into contact with or comes close to the abdomen 16b of the branch part 16B, thereby preventing rattling or shaking when the branch part 16B moves up and down. Prevent misalignment.

The elastic holding parts 34, 34 are formed in the shape of an inward circular arc, and are configured such that the interval width dimension (w3) between the vertices of the circular arc satisfies w1≦w3<w2. Further, the width (w4) of the elastic holding portion 34 is formed to be smaller than the interval between the guide ribs 46, 46.

(Configuration of wedge member)
As shown in FIGS. 18 to 20, the wedge member 16 is configured such that the leg portions 25 of the wedge body portion 16A can be freely inserted into the upper and lower insertion holes 21 and 22 of the upper and lower jaw portions 18 and 19 of the connecting fitting 15. At the same time, the branch part 16B is inserted through the upper and lower guide holes 28, 29 and the square tube part 33 of the holding means 32, and the retaining means 43 is secured by the head of a rivet or the like inserted into the lower end of the branch part 16B. It is set up. In this state, the wedge member 16 can be lowered to a position where the connecting portion 16C enters between the upper insertion hole 21 and the guide hole 28 (see FIG. 27), and the wedge member 16 can be pinched with the fingertips of the operator. The term "pull up" means that the retaining means 43 can be raised to a position where it contacts the edge of the lower guide hole 29 (see FIG. 29).

Regarding the vertical movement position, the wedge member 16 has a retracted position (P0) (see FIG. 23) in which the lower end 25e of the leg 25 is flush with the placement surface 30 of the upper jaw part 18 (see FIG. 23); The position where the part 25e is projected downward by a distance (t) from the mounting surface 30 is defined as a standby position (P1) (see FIGS. 18 and 20), and the part 25e is moved downward from the standby position and driven into the fastening hole 14 of the flange 13. The tightened position is defined as the tightened position (P2) (see FIG. 27), and the retaining means 43 is in contact with the edge of the lower guide hole 29, with the lower end 25e being above the mounting surface 30. The position moved to is defined as the dismantling position (P3) (see FIG. 29).

As shown in FIGS. 18 to 20, when the standby position (P1) is set, the thickness (T) of the flange 13 and the vertical width (H) of the receiving portion 20 are configured such that H>t, On the other hand, the distance (t) by which the lower end portion 25e projects downward is configured such that T>t. In the illustrated embodiment, the height (h) of the space between the lower end 25e of the wedge main body 16A and the lower jaw 19 is approximately equal to the thickness (T) of the flange 13, and is configured to satisfy T≦h. However, the configuration may be such that h<T<h+t.

The guide portion 38 of the lower end portion 25e formed of a conical or spherical surface may be provided over the entire area of the lower end portion 25e included in the protrusion distance (t), but in the illustrated embodiment, as shown in FIG. 20(B) As shown in FIG. The guide portion 38 is formed in a region included in the distance (g), and the locking portion 47 is formed in a region included in the upper distance (e).

As will be described later, regarding the horizontal relative movement between the connecting fitting 15 and the flange 13, the guide portion 38 constitutes a guide that comes into contact with the edge of the flange 13 and guides it in the riding direction. On the other hand, the locking portion 47 is configured to receive the edge of the flange 13 when it comes into contact with the edge and lock the flange 13 without being run over.

(Configuration of branch and holding means)
As shown in FIGS. 18 and 19, when the wedge member 16 is located at the standby position (P1), the branch portion 16B descends under its own weight, but the stopper portion 37 is placed on the elastic holding portion 34 and The wedge member 16 is received by the elastic holding portion 34 while in contact with the wedge member 16, thereby stopping the wedge member 16. At this time, the elastic holding part 34 is elastically deformable, but is configured not to be deformed by a force such that it receives a falling force due to the weight of the wedge member 16 due to the stopper part 37 placed thereon. In this state, the elastic holding section 34 grips the lower region 42 of the floating region 40 directly below the stopper section 37 so as to be able to move upward. In other words, even if it is not in contact with the surface of the lower region 42 but is faced through a gap, or is in contact without a gap, it does not elastically hold the surface of the lower region 42.

Therefore, in the standby position (P1), when the wedge member 16 is pinched by the operator's fingertips and a pulling force that exceeds the falling force is applied, the lower region 42 of the free movement region 40 in the branch portion 16B moves to the elastic holding portion 34. It can be easily moved upward without any resistance. 23 and 24 show a state in which the wedge member 16 has been moved upward to the retracted position (P0).

By the way, when the pulling force is released from the state located at the retracted position (P0), the wedge member 16 descends due to the falling force due to its own weight, and the stopper part 37 is placed on and abuts the elastic holding part 34. It stops again at the standby position (P1) and is made to stand still. 25 and 26 show a state in which the wedge member 16 has stopped again at the standby position (P1).

When the head 24 of the wedge member 16, which is stationary at the standby position (P1), is strongly pressed down by hitting with a hammer or the like, the stopper part 37 passes through the elastic holding part 34 by pushing it apart, moving the wedge member 16 to the tightening position (P1). It moves downward toward P2). As a result, the upper region 41 of the floating region 40 is exposed to the elastic holding portion 34 . In this state, the elastic holding portion 34 grips the upper region 41 so as to be freely movable downward. That is, even if it is not in contact with the surface of the upper region 41 but is faced through a gap, or is in contact without a gap, it does not elastically hold the surface of the upper region 41. 27 and 28 show a state in which the wedge member 16 has been moved downward to the tightening position (P2).

When the lower end of the branch portion 16B of the wedge member 16 which is in the tightened state at the tightening position (P2) is pushed up strongly by hitting with a hammer or the like, the stopper portion 37 passes through the elastic holding portion 34 by pushing it apart, and the wedge member 16 is moved toward the dismantling position (P3). At this time, the lower region 42 of the floating region 40 faces the elastic holding portion 34 . 29 and 30 show a state in which the wedge member 16 has been moved upward to the disassembly position (P3).

In the case of the illustrated embodiment, the elastic holding portion 34 faces the surface of the lower region 42 at the disassembly position (P3) through a gap without contacting it, or is in contact with the surface of the lower region 42 without a gap. Even if there is, it is configured so that the surface does not retain elasticity. However, the lower region 42 may be elastically held by the elastic holding portion 34 so that the wedge member 16 does not descend under its own weight from the dismantled position (P3). In other words, the floating region 40 may be formed of only the upper region 41, and the thickness of the branch portion 16B in the width direction in the lower region 42 may be formed to be larger than the width dimension (w3) of the interval between the elastic holding portions 34, 34. .

(effect)
Hereinafter, the operation of the fastening device according to the second embodiment configured as described above will be explained.

(Preliminary process)
Prior to connecting the connecting fitting 15 to the flange 13, the wedge member 16 is positioned at a standby position (P1), as shown in FIGS. 18 and 19. In this state, the wedge member 16 is stationary due to its own weight as the stopper portion 37 is placed in contact with the elastic holding portion 34, and the lower end portion 25e of the leg portion 25 of the wedge body portion 16A is placed on the wedge member 16. It is made to protrude downward from the surface 30 by a distance (t).

(Placement process)
In order to perform the tightening work, the connecting fitting 15 is moved laterally toward the flange 13 from the side facing the flange 13, the flange 13 is entered into the receiving part 20, and the mounting surface of the upper jaw part 18 is moved. 20 to 26 show the process of placing the flange 30 on the flange 13.

FIG. 20 shows a state in which the opening of the receiving portion 20 between the upper and lower jaw portions 18 and 19 is advanced toward the flange 13.

When the lower jaw portion 19 is held at a slightly higher position than the predetermined position with respect to the flange 13 and moved forward so as to come into contact with the edge of the flange 13, the lower jaw portion 19 is moved as shown in FIG. 20(A). By sliding the tip inclined portion 19b in contact with the edge of the flange 13, the posture of the lower jaw portion 19 is controlled in a direction in which the upper surface of the lower jaw portion 19 matches the lower surface of the flange 13, as shown by line L1. . Therefore, when the lower jaw part 19 is moved forward with its posture controlled so that the upper surface of the lower jaw part 19 is located slightly lower than the lower surface of the flange 13, as shown by the chain line, the guide part 38 of the lower end part 25e moves toward the edge of the flange 13. is brought into contact with.

On the other hand, when the lower jaw portion 19 is held at a position slightly lower than the predetermined position relative to the flange 13 and moved forward, the lower end portion 25e of the wedge member 16 is moved forward toward the flange 13, as shown in FIG. 20(B). touches the edge of the As shown in the figure, when the locking part 47 comes into contact with the edge of the flange 13, the flange 13 is prevented from entering the receiving part 20, so the operator can sense this with a sense of touch and tighten the connecting fitting 15. When it is lifted a little, the guide portion 38 of the lower end portion 25e is brought into contact with the edge of the flange 13.

Therefore, as shown in FIGS. 21 and 22, the wedge member 16 positions the guide portion 38 of the lower end portion 25e at a position that prevents the edge of the flange 13 from entering the receiving portion 20. However, by moving forward while in contact with the edge of the flange 13, the guide portion 38 is guided in a direction in which it runs over the edge.

Therefore, as shown in FIGS. 23 and 24, by being brought into contact with the edge of the flange 13, the wedge member 16 is moved from the standby position (P1) to the retracted position while causing the guide part 38 to ride on the edge. (P0), and can be slid to a predetermined position with the mounting surface 30 placed on the upper surface of the flange 13. The upward movement of the wedge member 16 due to the guide portion 38 riding on the wedge member 16 is performed by the lower region 42 constituting the floating region 40 moving upward smoothly without receiving resistance from the elastic holding portion 34, as described above.

Therefore, when the lower end portion 25e of the wedge member 16 located at the retracted position (P0) faces the fastening hole 14 of the flange 13, the wedge member 16 descends due to its own weight, and as shown in FIGS. 25 and 26, the stopper portion 37 It stops again at the position where it abuts the elastic holding part 34, that is, the standby position (P1), and is made to stand still.

In this way, by simply moving the connecting fitting 15 toward the flange 13 and entering the flange 13 into the receiving portion 20, the wedge member 16 is automatically retracted from the standby position (P1) to the retracted position (P0). By doing so, the flange 13 can be suitably advanced. Furthermore, by sliding the mounting surface 30 of the upper jaw part 18 on the upper surface of the flange 13, the wedge member 16 can be returned from the retracted position (P0) to the standby position (P1) by simply moving the connecting fitting 15 to a predetermined position. , and the lower end portion 25e is inserted into the fastening hole 14 of the flange 13.

At this time, if the locking part 47 is provided at the lower end 25e as described above, the locking part 47 will be locked to the upper edge of the fastening hole 14, and the mounting surface 30 will be retracted from the upper surface of the flange 13. Since sliding in the direction is prevented, the connecting fitting 15 can be prevented from falling off the flange 13 during work at high places.

(Tightening process)
When the head 24 of the wedge member 16, which is stationary at the standby position (P1) is strongly pressed down by a blow with a hammer, etc., it is moved down to the tightened position (P2), as shown in FIGS. 27 and 28, and the wedge member 16 is in the tightened state. form.

At this time, the stopper part 37 elastically deforms the elastic holding part 34 so that the branch part 16</b>B passes through and moves downward while spreading the elastic holding part 34 , so that the elastic holding part 34 faces the upper region 41 of the floating region 40 .

(Demolition process)
When removing the connecting fitting 15 from the flange 13 when dismantling the constructed temporary scaffolding, as shown in FIGS. 29 and 30, the lower end of the branch 16B protruding downward from the lower guide hole 29 When pushed up strongly by hitting with a hammer or the like, the retaining means 43 at the lower end moves upward until it comes into contact with the edge of the lower guide hole 29, and the wedge member 16 is moved to the dismantling position (P3). As a result, the lower end portion 25e of the wedge main body portion 16A is pulled out from the fastening hole 14 of the flange 13, and the connecting fitting 15 can be separated from the flange 13.

By the way, in the case of the illustrated embodiment, when the wedge member 16 moves upward from the tightening position (P2) to the disassembly position (P3), the stopper part 37 elastically deforms the elastic holding part 34 to push it apart while passing through the upper part. The elastic retaining portion 34 faces the lower region 42 of the floating region 40. Therefore, the wedge member 16 is moved down and stopped by its own weight from the dismantled position (P3) to the position where the stopper part 37 is placed on the elastic holding part 34, that is, the standby position (P1), and the wedge member 16 The lower end 25e of is inserted into the fastening hole 14 of the flange 13 again.

Therefore, even during disassembly work, the connecting fitting 15 locks the locking portion 47 of the lower end portion 25e to the upper edge of the fastening hole 14, so that the mounting surface 30 does not slide along the upper surface of the flange 13. is being prevented.

Therefore, when separating the connecting fitting 15 from the flange 13, if the connecting fitting 15 is lifted until the lower jaw part 18 comes into contact with the lower surface of the flange 13, the lower end part 25e will come out upward from the fastening hole 14, so that the state What is necessary is to move the connecting fitting 15 sideways.

At this time, it is not necessary to remove the entire lower end portion 25e above the fastening hole 14, as long as at least the locking portion 47 is removed. Even if the guide part 38 remains inserted into the fastening hole 14, it comes into contact with the edge of the fastening hole 14 and moves due to the relative lateral movement between the connecting fitting 15 and the flange 13, as described above. , thereby allowing the receiving part 20 to be pulled away from the flange 13.

As described above, according to the second embodiment, the long length is used not only when connecting the connecting fitting 15 to the flange 13 when constructing the scaffold, but also when separating the connecting fitting 15 from the flange 13 when dismantling the scaffold. The operation of handling the wedged connecting fittings 15, 15 provided at both ends of the connecting member 12 becomes simple and easy, and the danger of the connecting fittings 15 falling off from the flange 13 during the operation can be avoided.

<Third embodiment>
31 and 32 show a third embodiment of the invention.

In the first and second embodiments described above, the guide portion 38 is provided at the lower end portion 25e of the wedge main body portion 16A, but the intended purpose of the present invention can be achieved even if the guide portion 38 is not necessarily provided. Therefore, the third embodiment can be provided from this viewpoint. Note that the third embodiment has almost the same configuration as the first embodiment described above, and therefore, the common technical configurations will be explained by referring to the above description, and redundant explanation will be omitted. The technical configuration will be explained.

In the third embodiment, the weight of the wedge member 16 is supported between the branch portion 16B of the wedge member 16 and the elastic holding portion 34 of the holding means 32 by a free movement region 40 and a downwardly convex stopper 37. It constitutes a stationary means 44 for stopping at P1), and is similar to the first embodiment in this point, but the lower end 25e of the wedge main body 16A is provided with a guide section 38 like the first embodiment. may or may not be provided.

In the case of the third embodiment, as shown in FIG. 31, when the wedge member 16 is stationary at the standby position (P1), the lower end of the wedge main body 16A projects downward by a distance (t). A space with a height (h) formed between 25e and the lower jaw part 19 is configured so that h=H-t, and with respect to the thickness (T) of the flange 13, T<h. It is configured.

As a result, when placing the mounting surface 30 of the upper jaw part 18 of the connecting fitting 15 on the flange 13, the operator lifts up the connecting fitting 15 or the connecting member 12, and at the same time, the space at the height (h) is By determining the height position so as to face the flange 13, in that state, the flange 13 can be entered into the receiving portion 20 from the space, as shown in FIG. 32(A).

Therefore, by lowering the connecting fitting 15 at a position where the lower end portion 25e faces the fastening hole 14 while advancing the flange 13 into the receiving portion 20, the mounting surface 30 of the upper jaw portion 18 is placed on the flange 13. 32(B), the lower end portion 25e is inserted and locked into the fastening hole 14, and the upper jaw portion 18 can be prevented from falling off from the flange 13.

<Fourth embodiment>
33 to 35 show a fourth embodiment of the present invention.

In the third embodiment described above, similarly to the configuration of the first embodiment, the wedge member 16 located at the standby position (P1) has a downwardly convex stopper portion 37 facing the free movement area 40 and an elastic member of the holding means 32. Although the stationary means 44 constituted by the holding portion 34 allows the wedge member 16 to stand still so as not to fall due to its own weight, it is also configured to move upward easily. In the case of the fourth embodiment, the wedge member 16 , is configured to be controlled by a stationary means 44 so that it does not easily move in both the up and down directions.

In the illustrated embodiment, as shown in FIG. 34, when the wedge member 16 is located at the standby position (P1), the branch portion 16B has a stationary region 45 that is held by the elastic holding portion 34 of the holding means 32. A downwardly convex stopper portion 37 and an upwardly convex holding receiving portion 39 provided above and below the stationary region 45 face and abut the elastic holding portion 34 from above and below, respectively. In addition, the meaning of "tsumimochi" is as described above.

Therefore, only when a sufficient external force is applied to elastically deform the elastic holding part 34, the stopper part 37 and the holding receiving part 39 pass through the elastic holding part 34, thereby preventing the vertical movement of the wedge member 16. enable.

As in the case of the third embodiment, as shown in FIG. 33, the lower end of the wedge main body portion 16A is projected downward by a distance (t) when the wedge member 16 is stationary at the standby position (P1). A space having a height (h) is formed between the portion 25e and the lower jaw portion 19, and is configured such that T<h with respect to the thickness (T) of the flange 13.

Therefore, as in the case of the third embodiment, when placing the mounting surface 30 of the upper jaw part 18 of the connecting fitting 15 on the flange 13, the operator lifts the connecting fitting 15 or the connecting member 12 and By determining the height position so that the space with the height (h) faces the flange 13, in that state, the flange 13 is inserted into the receiving part 20 from the space as shown in FIG. 35(A). can be entered.

Therefore, by lowering the connecting fitting 15 at a position where the lower end portion 25e faces the fastening hole 14 while advancing the flange 13 into the receiving portion 20, the mounting surface 30 of the upper jaw portion 18 is placed on the flange 13. 35(B), the lower end portion 25e is inserted and locked into the fastening hole 14, and the upper jaw portion 18 can be prevented from falling off from the flange 13.

In the illustrated example, the static means 44 is configured to be controlled by the upper and lower stopper parts 37 and the holding receiving part 39 so that the static area 45 does not easily pass through the elastic holding part 34. A configuration may be adopted in which the thickness is increased toward the elastic holding part 34 so that it is controlled to stand still while being elastically held by the elastic holding part 34.

11 Support column 12 Connecting member 13 Flange 14 Tightening hole 14a Connecting support edge 15 Connecting fitting 16 Wedge member 16A Wedge main body 16B Branch 16C Connecting portion 16b Branch abdomen 17 Base 18 Upper jaw 19 Lower jaw 18a, 19a Contact portion 19b Lower jaw tip inclined part 20 Receiving part 21 Upper insertion hole 21a Receiving edge part 22 Lower insertion hole 22a Receiving edge part 23 Wedge part 23a Abdomen 23b Back part 24 Head part 25 Leg part 25e Lower end part 26 Hole part 27 Openings 27a, 27b Flat surface 28 Upper guide hole 29 Lower guide hole 30 Placement surface 31 Receiving portion 32 Holding means 33 Square tube portion 33a Regulating portion 34 Elastic holding portion 35 Mounting portion 36 Wing pieces 36a, 36b Straight line Edge portion 37 Stopper portion 38 Guide portion 39 Holding portion 40 Floating region 41 Upper region 42 Lower region 43 Retaining means 44 Stationary means 45 Stationary region 46 Guide rib 47 Locking portion

Claims (11)

A wedge fastening device that connects a connecting member to a flange that is fixed to a support column, and is composed of a connecting fitting (15) and a wedge member (16) that are fixed to the connecting member,
The connecting fitting (15) forms a receiving part (20) into which the flange is inserted between the upper jaw part (18) and the lower jaw part (19), and also has a mounting surface (30) on the lower surface of the upper jaw part (18). is formed,
The wedge member (16) has a wedge main body (16A) and a branch (16B) that are inserted into the upper and lower jaw parts (18) and (19), respectively, arranged side by side and integrated,
With the mounting surface (30) of the upper jaw part (18) placed on the flange (13) that has entered the receiving part (20), drive the wedge main body part (16A) into the tightening hole (14) of the flange. In a configuration in which it is tightened by moving it downward to the tightening position (P2),
Regarding the vertical movement position, the wedge member (16) moves the lower end (25e) of the wedge main body (16A) from the placement surface (30) toward the inside of the receiving portion (20) by a distance (t). The protruding position is a standby position (P1), and the position where the lower end (25e) is flush with the placement surface (30) of the upper jaw part (18) is a retracted position (P0). ) is formed with a guide portion (38), and when the flange (13) is advanced toward the receiving portion (20) with the wedge member (16) in the standby position (P1), the guide portion ( 38) is configured to abut against the edge of the flange (13) and move, thereby retracting the wedge member (16) toward the retracted position (P0),
The connecting fitting (15) is provided with a holding means (32) having an elastic holding part (34) facing the branch part (16B) of the wedge member (16), and the branch part (16B) is provided with a holding means (32) having an elastic holding part (34) facing the branch part (16B) of the wedge member (16). A floating area (40) facing the holding part (34) and a stopper part (37) are formed at a predetermined position of the floating area,
The floating region (40) and the elastic holding portion (34) are configured to allow the wedge member (16) to move downward from the retracted position (P0) toward the standby position (P1) due to its own weight,
The stopper part (37) and the elastic holding part (34) stop the wedge member (16) at the standby position (P1) by placing the stopper part (37) on the elastic holding part (34), and When a downward external force is applied to the wedge member (16) from a resting state, the stopper part (37) elastically deforms and passes through the elastic holding part (34), moving the wedge member (16) to the tightening position (P2). A wedge fastening device for a scaffold, characterized in that the wedge fastening device is configured to be moved downward toward the direction of the scaffold. The wedge fastening device for a scaffold according to claim 1, characterized in that the distance (t) is configured such that t<T with respect to the thickness (T) of the flange. When the wedge member (16) is in the standby position (P1), the height (h) of the space between the lower end (25e) of the wedge body (16A) and the lower jaw (19) is the thickness of the flange (T). ), it is configured such that T≦h,
A lower distance (g) and an upper distance (e) constituting a protrusion distance (t) of the lower end (25e) protruding downward from the mounting surface (30) are configured such that e<g,
The guide portion (38) is formed in a region included in the lower distance (g) of the lower end portion (25e), and the locking portion (47) is formed in a region included in the upper distance (e);
When the mounting surface (30) of the upper jaw part (18) is placed on the flange (13) with the wedge member (16) in the standby position (P1), the locking part (47) engages with the fastening hole (14) of the flange. The wedge tightening device for a scaffold according to claim 1 or 2, wherein the wedge tightening device for a scaffold is configured to prevent the maxillary portion (18) from moving laterally by being locked to the wedge. 3. The guide portion (38) is formed by a conical surface having a substantially conical shape toward the center of the lower end at the lower end portion (25e) of the wedge main body portion (16A). A wedge fastening device for the scaffold described in . The wedge in the scaffold according to claim 1, 2 or 3, wherein the guide portion (38) is formed of a substantially spherical spherical surface at the lower end portion (25e) of the wedge main body portion (16A). Tightening device. The wedge member (16) is moved from the fastening position (P2) to the disassembly position (where the lower end (25e) of the wedge main body (16A) is moved above the mounting surface (30) of the upper jaw part (18)). P3), the branch part (16B) is always inserted into the guide hole (29) of the lower jaw part (19), and the stopper provided at the lower end of the branch part (16B) The wedge member (16) is configured to prevent further upward movement from the disassembly position (P3) by bringing the means (43) into contact with the guide hole (29);
The branch portion (16B) forms a lower region (42) that is elastically held below the floating region (40) by the elastic holding portion (34) of the holding means (32),
The lower region (42) and the elastic holding portion (34) hold the lower region (42) by the elastic holding portion (34) when the wedge member (16) is moved upward to the disassembly position (P3), The wedge fastening in a scaffold according to claim 1, 2, 3, 4 or 5, characterized in that the wedge member (16) is configured to prevent the wedge member (16) from moving downward from the dismantled position (P3) due to its own weight. Device. A hollow part (26) is formed at the base (17) of the connecting fitting (15) from which the upper and lower jaw parts (18) and (19) are extended, and an opening (27) that opens toward the tail end is formed. In this configuration,
The holding means (32) is formed by bending a metal plate, and includes a square tube part (33) through which the branch part (16B) of the wedge member (16) is inserted, and a square tube part (33) extending from the square tube part. an elastic holding part (34) formed by a pair of spring pieces that holds both sides of the branch part (16B); and a mounting that extends from the square tube part and is self-retained inside the opening (27). The wedge fastening device for a scaffold according to claim 1, 2, 3, 4, 5 or 6, characterized in that it comprises a portion (35). A wedge fastening device that connects a connecting member to a flange that is fixed to a support column, and is composed of a connecting fitting (15) and a wedge member (16) that are fixed to the connecting member,
The connecting fitting (15) forms a receiving part (20) into which the flange is inserted between the upper jaw part (18) and the lower jaw part (19), and also has a mounting surface (30) on the lower surface of the upper jaw part (18). is formed,
The wedge member (16) has a wedge main body (16A) and a branch (16B) that are inserted into the upper and lower jaw parts (18) and (19), respectively, arranged side by side and integrated,
With the mounting surface (30) of the upper jaw part (18) placed on the flange (13) that has entered the receiving part (20), drive the wedge main body part (16A) into the tightening hole (14) of the flange. In a configuration in which it is tightened by moving it downward to the tightening position (P2),
Regarding the vertical movement position of the wedge member (16), the lower end (25e) of the wedge main body (16A) projects downward by a distance (t) from the mounting surface (30) of the upper jaw (18). The position where the is configured to
The connecting fitting (15) is provided with a holding means (32) having an elastic holding part (34) facing the branch part (16B) of the wedge member (16), and the elastic holding part (34) and the branch part (16B) constitutes a stationary means (44) for positioning and stationary the wedge member (16) at the standby position (P1),
With the wedge member (16) stationary at the standby position (P1) and the flange (13) entered into the receiving portion (20) through the space set to the height (h), the upper jaw portion (18) is inserted into the receiving portion (20). ) is configured such that by placing the mounting surface (30) of the wedge on the flange, the lower end (25e) of the wedge main body (16A) is inserted and locked into the fastening hole (14) of the flange. A wedge fastening device for scaffolding, characterized by: 9. The wedge fastening device for a scaffold according to claim 8, wherein the distance (t) is configured such that t<T with respect to the thickness (T) of the flange. The stationary means (44) includes a floating region (40) of the branch portion (16B) that is formed to move downward in a state facing the elastic holding portion (34) due to the weight of the wedge member (16), and Consisting of a stopper portion (37) formed above the region (40),
The stopper part (37) supports the weight of the wedge member (16) by being placed on the elastic holding part (34) from above when the wedge member (16) is located at the standby position (P1). When a downward external force is applied to the branch portion (16B), the elastic holding portion (34) is elastically deformed and passed downward, and the wedge member (16) is moved downward toward the tightening position (P2). 10. The wedge fastening device for a scaffold according to claim 8 or 9, wherein the wedge fastening device is configured to The stationary means (44) is constituted by a stationary area (45) formed in the branch (16B),
When the wedge member (16) is located at the standby position (P1), the elastic holding portion (34) elastically holds the stationary region (45) to keep the wedge member (16) stationary against its own weight. , characterized in that the stationary region (45) is configured such that the elastic holding portion (34) can be slid when an external force in the vertical direction is applied to elastically deform the elastic holding portion (34). The wedge fastening device for a scaffold according to claim 8 or 9.

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