JP7306643B2 - Wedge binding device in scaffolding - Google Patents

Description

The present invention relates to a wedge fastening device used in scaffolding such as temporary scaffolding.

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 detachably connecting a column 1 and a connecting member 2 such as a horizontal member, a tightening member provided on a flange 3 fixedly spaced apart in the longitudinal direction of the column 1 is provided. A wedge binding device is known in which a jaw fitting 5 fixed to an end of a connecting member 2 is tightened with a wedge member 6 in relation to a hole 4 .

The jaw fitting 5 has a receiving portion 9 formed between the upper and lower jaws 5a and 5b, and an upper insertion hole 7 and a lower insertion hole 8 provided in the upper and lower jaws 5a and 5b, respectively. When the flange 3 is inserted, the connection hole 4 of the flange and the insertion holes 7 and 8 of the upper and lower jaws are formed to communicate with each other in the vertical direction.

The wedge member 6 is formed of a plate-like body having a thickness that can be freely inserted into the holes, and is formed such that the width between the abdomen 6a and the back 6b is gradually narrowed downward.

Therefore, when the wedge member 6 is inserted from top to bottom through the insertion hole 7 of the upper jaw 5a, the coupling hole 4 of the flange 3, and the insertion hole 8 of the lower jaw 5b, the wedge member 6 is moved downward by hitting with a hammer or the like. The wedge member 6 is press-fitted between the connecting and supporting edge portion 4a of the binding hole 4 and the receiving edge portions 7a and 8a of the insertion holes 7 and 8, while expanding the distance between the connecting and supporting edge portion 4a and the receiving edge portions 7a and 8a. By pushing the jaw fitting 5, the tip portions of the upper and lower jaws 5a and 5b are brought into contact with the surface of the post in a press-contact state. This provides a tight fit between the flange 3, wedge member 6, jaw member 5 and strut 1 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 5b is struck with a hammer or the like to move upward, the tightened state is released.

JP 2018-71196 A

In order to perform the above-mentioned tightening work, it is first necessary to move the jaw fitting 5 laterally toward the flange 3 from a state in which it faces the side of the flange 3, so that the flange 3 enters the receiving portion 9. is. At this time, if the wedge member 6 is positioned inside the receiving portion 9 , the flange 3 cannot enter the receiving portion 9 . Therefore, as shown in FIG. 1A, the receiving portion 9 is opened by lifting the wedge member 6 to the retracted position P0 with the fingertips of the operator, and the jaw member 5 is opened while the wedge member 6 is held. It must be moved laterally towards the flange 3 .

When the flange 3 is inserted into the receiving portion 9 and the wedge member 6 faces the tightening hole 4 of the flange and is released from being held by a fingertip, the wedge member 6 descends by its own weight and stops at the standby position P1. Therefore, it can be lowered to the tightening position P2 by hitting with a hammer or the like.

Construction of scaffolding requires tying operations to be performed at numerous points. Since the jaw fitting 5 constitutes a heavy object integrated with the connecting member 2, it is hard work to position it so as to face the flange 3 and move it laterally. It is hard for the operator to keep holding the member 6 while being lifted to the retracted position P0.

The same applies to the dismantling of the scaffolding, and it is necessary to lift the wedge member 6 whose binding state has been released to the retracted position P0 and maintain the lifted state until the flange 3 is extracted from the receiving portion 9 of the jaw member 5. .

For this reason, the present invention is configured such that when the flange is inserted into the receiving portion of the jaw fitting, the wedge member retracted above the receiving portion can be held at the retracted position so that the entry is not hindered, and To provide a wedge tightening device configured such that a wedge member in a held state can be moved downward to a tightening position after the flange is inserted into the receiving portion.

Therefore, what the present invention constitutes as a means is a tightening device that connects the flange fixed to the post and the jaw metal fixed to the connecting member, and is formed between the upper jaw and the lower jaw of the jaw metal. With the flange inserted into the receiving portion, the wedge member inserted through the insertion hole of the upper and lower jaws and the coupling hole of the flange is driven downward to the coupling position, and the wedge portion of the wedge member is brought into contact with the coupling hole. The wedge member is received so as not to hinder the flange from entering the receiving portion in a configuration in which the abutting portion of the tip of the jaw fitting is abutted against the post by being press-fitted between the supporting edge portion and the receiving edge portion of the insertion hole. A spring means having an elastic holding portion for holding the wedge member at the retracted position is provided, wherein the spring means is an arm extending toward the back of the wedge member. A holding fitting fixed to the tip of the portion forms a pushing portion elastically contacting the back portion of the wedge member, and holding pieces extending from the pushing portion to both side surfaces of the wedge member. The wedge member is prevented from descending by its own weight in a state of being elastically contacted with the receiving edge portion, but allowed to move up and down due to an external force.

At this time, it is preferable that the holding metal fitting is arranged inside the insertion hole of the upper jaw.

Preferably, in a configuration in which a projection facing the holding piece of the holding metal fitting is provided on a side surface of the wedge member positioned at the retracted position, the holding piece is arranged in contact with the projection when the wedge member is lifted and positioned at the retracted position. A receiving portion is provided to receive the protrusion in contact with the receiving portion, and the distance L from the lower end of the wedge member held at the retracted position with the projection in contact with the receiving portion to the lower surface of the receiving portion and the thickness T of the flange is configured to satisfy L>T.

According to the present invention, when the flange 13 is inserted into the receiving portion 20 of the jaw metal fitting 15, the wedge member 16 is retracted to the retracted position P0 so that the receiving portion 20 is opened. Since it is held at the retracted position P0 by the resilient holding portion 30 of 26, the operation of inserting the flange 13 into the receiving portion 20 is facilitated. The holding force of the resilient holding portion 30 by the spring means 26 prevents the wedge member 16 from descending due to its own weight, but allows the wedge member 16 to move up and down due to an external force. While in the held state, it can be lowered to the tightening position P2 by striking with a hammer or the like, and the tightening state can be formed simply and easily.

FIG. 10A is a cross-sectional view showing a state in which a flange is inserted into a receiving portion of a jaw metal fitting, and FIG. 8B is a cross-sectional view showing a tightening state after driving a wedge member. FIG. 4 is a perspective view of the spaced-apart flanges of the struts and the jaws of the connecting member with the wedging members separated for an embodiment of the present invention; FIG. 11 is a perspective view showing a state in which the flange is inserted into the receiving portion of the jaw metal fitting and tightened by driving the wedge member; (A) is a perspective view showing a wedge member, and (B) is a perspective view showing a spring means. FIG. 4 is a perspective view showing the jaw fitting, wedge member and spring means; FIG. 10 is a cross-sectional view showing a state in which the receiving portion of the metal jaw faces the flange while the wedge member is held at the retracted position; FIG. 10 is a cross-sectional view showing a state in which the flange is inserted into the receiving portion of the metal jaw while the wedge member is held at the retracted position; FIG. 10 is a cross-sectional view showing a state in which the wedge member is moved downward while the flange is inserted into the receiving portion of the jaw metal fitting; FIG. 10 is a cross-sectional view showing a tightening state in which the wedge member is moved downward to the tightening position while the flange is inserted into the receiving portion of the jaw metal fitting;

Preferred embodiments of the present invention will be described in detail below with reference to the drawings.

Figures 2-9 show a wedge fastening device according to an embodiment of the present invention.

(basic configuration)
First, the "basic configuration" will be explained. As shown in the figure, the wedge binding device is a device for detachably connecting a column 11 and a connecting member 12 such as a horizontal member in a temporary scaffold, for example, and is fixed at intervals in the longitudinal direction of the column 11. A jaw metal fitting 15 fixed to the end of the connecting member 12 is connected by a wedge member 16 to a connecting hole 14 provided in the flange 13 .

The jaw fitting 15 forms a receiving portion 20 between the upper and lower jaws by extending the upper jaw 18 and the lower jaw 19 from a cylindrical portion 17 fixed to the connecting member 12. An upper insertion hole 21 and a lower insertion hole 22 are provided, respectively. When the flange 13 is inserted into the receiving portion 20, the tightening hole 14 of the flange and the insertion holes 21 and 22 of the upper and lower jaws are communicated in the vertical direction. It is designed to allow Abutting portions 18 a and 19 a formed by circular arc surfaces along the peripheral surface of the post 11 are provided at the distal ends of the upper jaw portion 18 and the lower jaw portion 19 .

The wedge member 16 is formed of a board-like body having a thickness that can be freely inserted into the holes 21, 14, and 22. The wedge member 16 has a wedge portion 23 in the middle portion in the vertical direction. 24 and leg portions 25 are provided, and the wedge portion 23 is formed such that the width between the abdomen 23a and the back portion 23b gradually narrows downward. At this time, the abdomen 23a is formed so as to be parallel to the axis of the post 11, and the back 23b is formed so as to be inclined with respect thereto. The sides of the head 24 and leg 25 are provided with projections 24a and 25a, respectively, which are formed, for example, by the heads of rivets.

As will be described later with reference to FIG. 9, the flange 13 is inserted into the receiving portion 20 of the jaw fitting 15, and the insertion holes 21 and 22 of the upper and lower jaws 18 and 19 face the upper and lower connection holes 14 of the flange. With the wedge member 16 inserted through the hole from top to bottom, when the wedge member 16 is struck with a hammer or the like and moved downward, the wedge member 16 engages the connecting and supporting edge portion 14a of the tightening hole 14 and the receiving holes 21 and 22. The upper and lower jaws 18 are press-fitted between the edges 21a and 22a, and the upper and lower jaws 18, 18, 18 are moved forward while expanding the distance between the connecting edge 4a and the receiving edges 21a, 22a. The abutment portions 18a and 19a of 19 are brought into contact with the surface of the column 11 in a press-contact state. This provides tightness between the flange 13, wedge member 16, jaw member 15 and strut 11 to each other.

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 above "basic configuration" is generally the same as the configuration of the prior art described above. In such a configuration, the present invention provides spring means 26 on jaw fitting 15 .

(Configuration of spring means)
The spring means 26 is formed by bending a leaf spring, and includes a fixing portion 27 fixed to the inner bottom portion 17a of the tubular portion 17 of the jaw metal fitting 15, and a standing portion bent from the fixing portion 27 and standing. 28 and an arm portion 29 that is bent from the standing portion 28 and extends toward the insertion hole 21 on the upper side.

The spring means 26 is bent into a substantially U-shape by the fixing portion 27, the standing portion 28 and the arm portion 29. The fixing portion 27 is fixed to the inner bottom portion 17a of the tubular portion 17 by means of fasteners 31 such as bolts and nuts. are fixed in a state of being housed in the inner space of the cylindrical portion 17 (in the illustrated example, the space extending over the inner portion of the cylindrical portion and the inner portion of the connecting member).

The resilient holding portion 30 is composed of a holding metal fitting 33 fixed to the tip portion of the arm portion 29 with a fixing device 32 such as a bolt or nut. As shown in FIG. 4B, the holding metal fitting 33 has vertical plate-shaped holding pieces 35 extending from a pushing portion 34 that abuts against the back of the wedge member 16 to the side surface of the wedge member 16 . A passage 33a for inserting the wedge member 16 is formed between the holding pieces 35, 35, and the front side (X1 direction side described later) of the passage 33a is open. The lower edge of the holding piece 35 is formed with a recessed receiving portion 35a.

With the spring means 26 mounted in the inner space of the cylindrical portion 17 as described above, the holding metal fitting 33 constituting the resilient holding portion 30 is positioned inside the upper insertion hole 21 . As shown, the upper jaw 18 defines an insertion hole 21 with a downward bulge having a seat 18b that can rest on the upper surface of the flange 13, so that the retainer 33 passes through the seat 18b. It is installed in a state of being housed between it and the upper opening of the hole 21 .

Therefore, the spring means 26 and the holding metal fitting 33 are mounted inside the jaw metal fitting 15 in a protected state without being exposed to the outside, and furthermore, they do not interfere with the flange inside the receiving portion 20 into which the flange 13 is inserted. It is worn so that there is no

In the case of the illustrated embodiment, the spring means 26 causes the holding pieces 35, 35 of the holding metal fitting 33 to move in the forward direction X1 toward the center of the column 11 from the upper insertion hole 21 and the backward direction X2 opposite thereto. With the wedge member 16 inserted into the passage 33a between the insertion holes 21, the pushing portion 34 is elastically contacted with the back portion of the wedge member 16, thereby elastically biasing the wedge member 16 in the forward direction X1. It constitutes a forward spring means 26A which is held by elastic contact with the receiving edge 21a.

(action)
Figures 6-9 illustrate the method and operation for tying with a wedge tying device according to an embodiment.

FIG. 6 shows a state in which the jaw fitting 15 faces the side of the flange 13 . At this time, the wedge member 16 is held by the spring means 26 while being lifted to the retracted position P0.

The spring means 26 elastically contacts the back portion of the wedge member 16 with the wedge member 16 inserted into the passage 33a between the holding pieces 35, 35 of the holding metal fitting 33 in the forward direction X1. The wedge member 16 is held in elastic contact with the receiving edge portion 21a of the insertion hole 21 on the upper side.

The elastic holding force of the holding metal fitting 33 by the spring means 26 prevents the wedge member 16 from lowering due to its own weight, but allows the wedge member 16 to move up and down due to an external force.

Therefore, the wedge member 16 in the held state can be lifted by the operator's fingertips or the like, and at that time, the protrusions 25a of the leg portions 25 of the wedge member 16 come into contact with the receiving portions 35a of the holding metal fittings 33 from below. This position is defined as the retracted position P0 of the wedge member 16. As shown in FIG. In the illustrated embodiment, the wedge member 16 projects the lower end of the leg 25 into the receiving portion 20 from the upper surface (seat surface 18b) of the receiving portion 20. The distance L to the lower surface of the lower jaw 19 (the upper surface of the lower jaw 19) is larger than the thickness T of the flange 13, and is set so that L>T. It is configured to

Thus, in the present invention, the retracted position P0 of the wedge member 16 is the position of the wedge member 16 retracted upward so as not to hinder the entry of the flange 13 into the receiving portion 20, as shown in FIG. In addition, it should be understood that this includes the case where the lower ends of the legs 25 enter the receiving portion 20 to the extent that the entry of the flange is not hindered.

Therefore, as shown in FIG. 7, when the jaw fitting 15 is moved laterally toward the flange 13 from the state facing the side of the flange 13, the flange 13 enters the receiving portion 20, and the jaw fitting 15 is removed. When the seat surface 18 b is placed on the upper surface of the flange 13 , the lower end of the leg portion 25 of the wedge member 16 enters the fastening hole 14 .

Therefore, the jaw fitting 15 can be temporarily placed on the flange 13 in a positioned state by placing the seat surface 18b. At this time, the lower end of the leg portion 25 of the wedge member 16 is inserted into the binding hole 14 to prevent the seat surface 18b from slipping down from the flange 13, thereby enabling a stable temporary placement state.

When the wedge member 16 is moved downward from this state, the wedge member 16 descends to the tightening position P2 shown in FIG. 9 via the waiting position P1 shown in FIG. When the wedge member 16 descends, as shown in FIG. 8, the holding metal fitting 33 is pushed by the back portion 23b of the wedge member 16 and retreats in the rearward direction X2 due to the elastic deformation of the spring means 26. As shown in FIG.

The wedge member 16 may be moved downward to the tightening position P2 by hitting the head 24 of the wedge member 16 held at the retracted position P0 with a hammer or the like. The wedge member 16 may be lowered to the standby position P1 with a fingertip or the like, and then the head 24 may be struck with a hammer or the like to be lowered to the tightening position P2.

While the wedge member 16 is moved downward from the retracted position P0 to the tightening position P2, the wedge member 16 is elastically biased by the holding metal fitting 33 of the spring means 26, and is held in a predetermined posture, so that it does not tilt due to rattling or the like. Therefore, it is easy to strike with a hammer.

As shown in FIG. 9, the wedge member 16 moved downward to the fastening position P2 is positioned so that the wedge portion 23 is positioned between the connecting and supporting edge portion 14a of the fastening hole 14 and the receiving edges 21a and 22a of the insertion holes 21 and 22. As shown in FIG. By press-fitting, the abutment portions 18a and 19a of the jaw metal fitting 15 abut on the surface of the post 11 in a press-contact state. As a result, the flange 13, the wedge member 16, the metal jaw 15, and the strut 11 are tightly connected to each other.

When dismantling the scaffolding, the binding state can be released by hitting the lower end of the leg portion 25 with a hammer or the like to move the wedge member 16 upward.

11 Strut 12 Connecting member 13 Flange 14 Fastening hole 14a Connecting edge 15 Jaw fitting 16 Wedge member 17 Cylindrical part 17a Inner bottom 18 Upper jaw 18a Contact part 18b Seat surface 19 Lower jaw 19a Contact part 20 Receiving part 21 Upper side Insertion hole 21a Receiving edge 22 Lower insertion hole 22a Receiving edge 23 Wedge 23a Abdomen 23b Back 24 Head 24a Projection 25 Leg 25a Projection 26 Spring means 26A Forward spring means 27 Fixed part 28 Standing part 29 Arm part 30 Resilient holding parts 31, 32 Fixing tool 33 Holding metal fitting 33a Passage 34 Pushing part 35 Holding piece 35a Receiving part 36 Shaft member

Claims (3)

A tightening device that connects a flange fixed to a support and a jaw metal fixed to a connecting member,
With the flange inserted into the receiving portion formed between the upper and lower jaws of the jaw metal fitting, the wedge member inserted through the insertion hole of the upper and lower jaws and the tightening hole of the flange is driven downward to the tightening position. and press-fitting the wedge portion of the wedge member between the connecting and supporting edge portion of the coupling hole and the receiving edge portion of the insertion hole so that the contact portion of the tip of the jaw fitting is brought into contact with the post,
A position where the wedge member (16) is retracted above the receiving portion (20) so as not to prevent the flange (13) from entering the receiving portion (20) is defined as a retracted position (P0). A spring means (26) with a spring retainer (30) is provided,
The spring means (26) has a pushing portion (34) which is in elastic contact with the back portion of the wedge member (16) by means of a holding metal fitting (33) fixed to the tip of an arm portion (29) extending toward the back portion of the wedge member (16). and holding pieces (35, 35) extending from the pushing portion (34) to both side surfaces of the wedge member,
The wedge member is elastically biased by the pushing portion (34) to elastically contact the receiving edge portion (21a). A wedge fastening device in a scaffold, characterized in that it is constructed to allow 2. A wedge binding device for a scaffold according to claim 1, wherein said holding metal fitting (33) is arranged inside an insertion hole (21) of said upper jaw (18). In the configuration in which a protrusion (25a) facing the holding piece (35) of the holding metal fitting is provided on the side surface of the wedge member positioned at the retracted position (P0),
The holding piece (35) is provided with a receiving portion (35a) that abuts and receives the projection (25a) when the wedge member is lifted to the retracted position (P0),
The distance L from the lower end of the wedge member held at the retracted position (P0) with the projection in contact with the receiving portion to the lower surface of the receiving portion (20) and the thickness T of the flange (13) are L>T. 3. A wedge fastening device in a scaffolding according to claim 1 or 2, characterized in that it is constructed as follows.

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