JP5878898B2 - Scaffolding coupling device - Google Patents

Description

  The present invention relates to a scaffold connecting device for connecting pipe-shaped parts in a scaffold used in a construction site or the like.

  In construction sites such as buildings such as houses and buildings, and civil engineering structures such as bridges and tunnels, scaffolds are built up and down to the required height. As a connecting device for connecting scaffolding materials, a cylindrical pin body in which an opening and a guide hole are formed apart from each other in the axial direction is arranged inside the pin body, and the distal end side is external through the opening. An engaging projection that can protrude and retract, a connecting portion that extends from the base end side opposite to the distal end side of the engaging projection to the guide hole, and a guide protrusion that protrudes from the connecting portion into the guide hole There is known a coupling device including an engaging member and a spring that urges a connecting portion of the engaging member so that an engaging protrusion protrudes from a pin body (for example, Patent Document 1). And Patent Document 2).

  In the techniques of Patent Literature 1 and Patent Literature 2, an engagement step portion that can be engaged with the edge of the opening portion of the pin body is formed on the surface of the engagement protrusion that faces the end portion of the pin body, and the engagement step. Sliding surfaces inclined in the same direction are formed on the distal end side and the proximal end side of the portion. As a result, when the pin body is inserted into the pipe-shaped part of the scaffolding material, the end of the scaffolding material abuts against the sliding surface, so that the engaging protrusion is immersed in the pin body against the biasing force of the spring. The pin body can be easily inserted into the scaffold. And it can be connected so that a pin main body (connecting device) may not come out from a scaffolding material by making an immersion engaging projection project to an engagement hole of a scaffolding material by a biasing force of a spring. On the other hand, when the coupling device is removed from the scaffold, the engagement protrusion is pressed and the engagement step is engaged with the edge of the opening of the pin body, so that the engagement protrusion is kept half-immersed. Then, the connecting device can be pulled out from the scaffold.

  However, in the techniques of Patent Document 1 and Patent Document 2, when the engaging protrusion is immersed in the pin body, the engaging protrusion moves along the circumference around the guide protrusion side of the engaging member. The biasing force of the spring acts in a direction inclined toward the end with respect to the direction perpendicular to the axis of the pin body. Since the engagement step portion is formed in the middle of the sliding surface for immersing the engagement protrusion, the spring of the spring is inserted after the engagement protrusion is immersed in the pin body by inserting the pin body into the scaffolding material. When trying to protrude by the urging force, the engaging step portion remains engaged with the edge of the opening of the pin main body due to the urging force acting obliquely, and the engaging protrusion becomes the engaging hole of the scaffolding material. Sometimes it did not protrude. Therefore, it is necessary to operate the engagement protrusion through the engagement hole of the scaffolding material so that the engagement between the edge of the opening of the pin main body and the engagement protrusion is released, and the connection work is troublesome. was there.

  Then, this invention makes it a subject to provide the coupling device for scaffolds which can connect scaffold materials easily in view of said situation.

  In order to solve the above-described problems, the scaffold coupling device according to the present invention is described as follows: “A cylindrical insertion tube portion that can be inserted into a pipe-shaped portion of the scaffold material, and an entire circumference in an axially intermediate portion of the insertion tube portion. An apparatus body having an annular projecting tube portion projecting over the surface, an opening portion opened to the outer peripheral surface of the insertion tube portion on the end side of the projecting tube portion, and the opening portion. A lock pin that passes through in a direction perpendicular to the axis of the insertion tube portion, and a spring that is attached to the lock pin and is inserted into the insertion tube portion and biases the lock pin in a direction protruding from the opening. The lock pin is based on a position outward from the outer peripheral surface of the insertion tube portion in a state in which the lock pin protrudes from the opening by the biasing force of the spring member. As you go to the tip, the opening An outer periphery of the lock pin at a guide surface that is inclined in a direction away from an end side of the insertion tube portion that is open, and a proximal end of the guide surface or a position closer to the distal end than the proximal end of the lock pin The surface extends from at least a portion excluding the guide surface in a direction perpendicular to the axis of the lock pin so as to be able to pass through the opening, and the lock pin is immersed against the urging force of the spring member. It has a locking surface portion that can be locked to the edge of the opening when it is made. "

  Here, as the “spring member”, “a plate spring that is bent in the direction perpendicular to the axis of the main body of the apparatus and the base end of the lock pin is attached to the top of the curve”, “locked to one end” For example, “coil spring to which the base end of the pin is attached”, “strip-shaped leaf spring in which the base end of the lock pin is attached to the outer surface near one end portion and bent in a U shape”, etc. .

  The coupling device for a scaffold according to the present invention is a pipe-shaped portion of the scaffold material (hereinafter also simply referred to as a scaffold material) in a state in which the lock pin protrudes from the opening of the insertion tube portion of the apparatus body by the biasing force of the spring member. When the insertion tube portion is inserted, the inclined guide surface of the lock pin comes into contact with the end portion of the scaffolding material, and the lock pin enters the insertion tube portion against the biasing force of the spring member. Thereby, the insertion cylinder part can be inserted into the scaffold material further deeply, and can be inserted until the protruding cylinder part comes into contact with the end part of the scaffold material. At this time, since the lock pin is urged by the spring member in the protruding direction, the insertion tube portion moves in a state where the tip of the lock pin is in contact with the inner surface of the scaffold material. And if a lock pin corresponds with the connection hole currently formed in the scaffolding material, a lock pin will protrude in a connection hole with the urging | biasing force of a spring member. At this time, in the lock pin, the locking surface portion is formed on the outer peripheral surface excluding at least the guide surface, and the guide surface is a continuous surface. Therefore, unlike the conventional coupling device, the middle of the guide surface is not caught by the edge of the opening, and the lock pin projects smoothly into the coupling hole. As a result, even if the device body is pulled from the scaffold, the lock pin does not come out of engagement with the coupling hole, so that the insertion tube portion is locked with respect to the scaffold, and the scaffold coupling device is attached to the scaffold. Are connected.

  For example, by making the apparatus main body symmetrical with respect to the protruding cylinder part, the opposite part of the insertion cylinder part can be connected to the scaffold in the same procedure as described above. Thus, the scaffold members can be coupled to each other by the scaffold coupling device.

  On the other hand, when removing the scaffold coupling device from the scaffold material, the tip of the lock pin is pressed into the insertion tube portion from the connection hole of the scaffold material, and the lock pin is moved into the insertion tube portion against the biasing force of the spring member. At the same time, the locking pin is moved toward the periphery of the opening, and the locking surface is brought into contact with the inner surface of the insertion tube and hooked on the edge of the opening to be locked. As a result, a part of the distal end side of the lock pin protrudes from the insertion cylinder portion, and at the same time, the proximal end side of the guide surface enters the insertion cylinder portion (center side from the inner surface) through the opening. In this state, when the coupling device for the scaffold is relatively moved in the direction of removing from the scaffold material, the surface of the lock pin opposite to the guide surface comes into contact with the scaffold material coupling hole, and the lock pin is inserted into the insertion tube portion. The guide surface of the lock pin is pressed against the inner surface of the opening of the insertion tube portion. Then, the lock pin is guided in the guide surface pressed by the opening and moves in the direction of immersing against the urging force of the spring member, so that the tip of the lock pin is sunk more than the connecting hole. Thereby, the lock | rock by a lock pin is cancelled | released and the insertion cylinder part (connecting device for scaffolds) can be easily pulled out from a scaffold material.

  Thus, according to the scaffold coupling device of the present invention, the guide surface that is inclined from the proximal end side of the lock pin toward the distal end is constituted by one continuous surface without a step in the middle. Even if the guide surface comes into contact with the edge of the opening (the inner surface side edge of the insertion tube), the guide surface does not get caught, and the lock pin is securely attached by the biasing force of the spring member (insertion tube) Can be infested against.

  Further, since the lock pin is urged by the spring member in the direction protruding from the opening, that is, in the direction perpendicular to the axis of the insertion tube portion, the lock pin can be easily projected and retracted in the direction perpendicular to the axis of the apparatus main body. Therefore, after the lock pin is immersed in the apparatus main body, the lock pin can be reliably projected by the biasing force of the spring member.

  In addition to the above-described configuration, the scaffold coupling device according to the present invention may be characterized in that “the opening of the device main body is opened in a circular shape”.

  According to the present invention, since the opening of the apparatus main body is circular, for example, when the lock pin protrudes from the apparatus main body with the center of the opening and the axis of the lock pin being eccentric, Since the guide surface protrudes in contact with the inner surface of the opening due to the centering, the lock pin becomes thicker as the lock pin protrudes, so the axis of the lock pin is the center of the opening. The lock pin moves in the direction that coincides with. Therefore, since the eccentricity with the opening is eliminated as the lock pin protrudes, the locking surface portion is not caught by the edge of the opening and the lock pin can be reliably protruded.

  In addition, since the opening is circular, the same structure as the device main body of a conventional scaffold connecting device that does not include a lock pin is used, so that the conventional device main body can be used. Therefore, by inserting the lock pin and the spring member of the present invention into the conventional apparatus main body, the scaffold coupling device of the present invention can be constructed, and the same function as described above can be provided.

  As described above, according to the present invention, it is possible to provide a scaffold coupling device that can easily couple the scaffold materials.

(A) is a perspective view of the connecting device for scaffolds which is one Embodiment of this invention, (b) is a longitudinal cross-sectional view of the state which connected the scaffold material with the connecting device for scaffolds. It is a disassembled perspective view which decomposes | disassembles and shows the coupling device for scaffolds. It is explanatory drawing which shows the connection of the scaffold material by the coupling device for scaffolds. (A) is sectional drawing which expands and shows the state which latched the locking surface part of the lock pin to the edge of the opening part in the cross section of FIG.1 (b), (b) is BB in (a). It is sectional drawing.

  A scaffold coupling device 1 according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 4. The scaffold coupling device 1 of the present embodiment is a device for coupling the scaffolding materials A for constructing the scaffolds at the construction site. The scaffold coupling device 1 includes a cylindrical device body 2, a lock pin 3 that can be projected and retracted from the outer peripheral surface of the device body 2, and a direction in which the lock pin 3 protrudes from the device body (outward in the direction perpendicular to the axis). And a spring member 4 urging to). In addition, the scaffold coupling device 1 includes a second lock pin 5 and a second lock pin 5 that can be moved outward from a position different in the axial direction in the device main body 2 from the lock pin 3. And a second spring member 6 biased in the protruding direction.

  The apparatus main body 2 includes a cylindrical insertion tube portion 11 that can be inserted into the pipe-shaped connecting portion P of the scaffold A, and one end portion (the lower end in FIG. 2) from the axial center of the insertion tube portion 11. Part) The annular projecting cylinder part 12 projecting over the entire circumference in the part closer to the side, and on the outer peripheral surface of the insertion cylinder part 11, the side opposite to the projecting cylinder part 12 from the axial center (upper side in FIG. 2) The opening 13 that opens in a circular shape at a position close to the end and the end of the insertion tube portion 11 on the side where the opening 13 is open are curved in an arc shape toward the center of the insertion tube portion 11. A rounded portion 14 and a second opening 15 that is circularly opened through the insertion cylinder 11 on the opposite side of the opening 13 with respect to the protruding cylinder 12 in the insertion cylinder 11. Yes. In the figure, a similar opening is formed on the opposite side of the opening 13, but this opening is not essential.

  The lock pin 3 can be inserted into the opening 13 of the apparatus main body 2, and the base end side has an octagonal outer shape when viewed from the axial direction. The lock pin 3 extends from the vicinity of the base end side of the side surface forming one side of the two sides extending in parallel to each other of the octagonal side to the distal end side of the side surface forming the other side. The guide surface 22 that extends obliquely, and the guide surface 22 and the distal side of the guide surface 22 on the outer peripheral surface of the lock pin 3 at a position slightly distal to the base end of the guide surface 22 in the lock pin 3. A locking surface portion 23 extending in a direction perpendicular to the axis of the lock pin 3 from a portion excluding parallel side surfaces (a surface facing downward in FIG. 1B), and a guide surface 22 at the tip of the lock pin 3. And a second guide surface 24 extending obliquely to the opposite side.

  The length from the proximal end of the lock pin 3 to the proximal end side of the guide surface 22 is slightly longer than the thickness of the peripheral wall of the insertion tube portion 11. Further, the side on the distal end side of the guide surface 22 is located slightly closer to the center than the outer periphery of the lock pin 3 when viewed from the axial direction. Further, the locking surface portion 23 is formed in a size that can pass through the opening 13 of the apparatus main body 2.

  The spring member 4 includes a curved strip-shaped spring body 31 and bent portions 32 that are curved in the opposite direction to the spring body 31 at a radius of curvature smaller than the curvature of the spring body 31 at both ends of the spring body 31. And an operation piece 33 extending outward from one of the bent portions 32 and having its tip turned back. In the state before the assembly, the spring body 31 of the spring member 4 is formed such that the distance from the line connecting both ends to the apex (center) of the curved portion is slightly larger than the inner diameter of the insertion tube portion 11. ing.

  The second lock pin 5 is formed in a cylindrical shape having a size that can be inserted into the second opening 15 of the apparatus body 2. In the present embodiment, two second lock pins 5 are provided so as to correspond to the two second openings 15. The second spring member 6 is formed by bending a band plate into a V shape. The second lock pins 5 are respectively attached to the outer surfaces near both ends of the second spring member 6. The second spring member 6 is formed such that the distance between the tip portions is slightly larger than the inner diameter of the insertion tube portion 11 before being assembled.

  Next, the assembly of the scaffold coupling device 1 of this embodiment will be described. First, the base end side of the lock pin 3 is attached to the center of the spring body 31 that is curved in the spring member 4. When the lock pin 3 is attached, the lock pin 3 is attached so that the guide surface 22 faces the direction in which the operation piece 33 of the spring member 4 is provided. In the present embodiment, a rectangular column-shaped mounting portion 25 formed at the base end of the lock pin 3 is inserted into a square hole (not shown) formed in the center of the spring body 31, The lock pin 3 is attached to the spring member 4 by caulking the attachment portion 25 protruding in the direction.

  Then, the spring member 4 to which the lock pin 3 is attached is moved from the end portion side where the rounding portion 14 is formed in the apparatus main body 2 into the insertion tube portion 11 from the bent portion 32 side where the operation piece 33 is not provided. insert. At this time, the spring body 31 is elastically deformed so that the lock pin 3 protruding from the spring member 4 enters the insertion tube portion 11. When the lock pin 3 protruding from the spring member 4 reaches the position of the opening 13, the tip of the lock pin 3 passes through the opening 13 due to the biasing force of the spring member 4, and from the outer peripheral surface of the insertion tube portion 11. Protrused outward. At this time, by operating the operation piece 33 of the spring member 4, the positions of the lock pin 3 protruding from the spring member 4 and the opening 13 can be easily matched.

  By causing the lock pin 3 to protrude from the opening portion 13 by the biasing force of the spring member 4, the guide surface 22 of the lock pin 3 has a position outward from the outer peripheral surface of the insertion tube portion 11 as a base end and heads toward the distal end. Accordingly, the opening portion 13 is inclined so as to be away from the end portion side of the insertion tube portion 11 that is open.

  On the other hand, the second lock pins 5 are respectively attached to the outer surfaces near both ends of the V-shaped second spring member 6. In the present embodiment, the columnar mounting portion 5 a formed at one end of the second lock pin 5 is replaced with a mounting hole (not shown) formed near the end of the second spring member 6. After the insertion, the attachment portion 5a is attached by caulking.

  The second spring member 6 to which the second lock pin 5 is attached at both ends is inserted into the insertion tube portion 11 from the end side opposite to the rounding portion 14 in the apparatus main body 2. At this time, in a state where the two second lock pins 5 approach each other against the urging force of the second spring member 6 so that the two second lock pins 5 enter the insertion tube portion 11, The second spring member 6 is inserted from both ends of the V shape (the side on which the second lock pin 5 is attached). When the two second lock pins 5 reach the position of the second opening 15, the second lock pin 5 passes through the second opening 15 by the urging force of the second spring member 5, and the insertion tube portion 11. It will be in the state protruded outward from the outer peripheral surface. Thereby, the assembly of the scaffold coupling device 1 is completed.

  Next, the connection of the scaffolding materials A using the scaffold connection device 1 of the present embodiment will be described. The scaffold coupling device 1 of the present embodiment has a coupling portion P (first coupling portion P1) having an inner diameter slightly larger than the outer diameter of the insertion cylindrical portion 11 on the rounded portion 14 side of the protruding cylindrical portion 12 in the device main body 2. Can be connected, and a connecting hole h is formed at a position corresponding to the opening 13 in the first connecting portion P1. On the other hand, on the side opposite to the rounded portion 14 with respect to the protruding cylindrical portion 12, a scaffold A having a connecting portion P (second connecting portion P2) having an inner diameter slightly larger than the outer diameter of the inserting cylindrical portion 11 is connected. The second connection hole h2 is formed at a position corresponding to the second opening 15 in the second connection part P2. In the present embodiment, the first connecting part P1 and the second connecting part P2 are pipes having the same inner and outer diameters. Moreover, although illustration is abbreviate | omitted, the 1st connection part P1 is provided in one edge part of one scaffold A, and the 2nd connection part P2 is provided in the edge part on the opposite side.

  First, the connection with the scaffold material A on the first connection portion P1 side will be described. The scaffold coupling device 1 is coupled to the first coupling portion P1 such that the insertion tube portion 11 enters the first coupling portion P1 from the rounded portion 14 side with the lock pin 3 protruding from the opening 13. Next, the 1st connection part P1 (scaffold material A) is moved to the direction of the protrusion cylinder part 12 (refer Fig.3 (a)). And if the edge part of the 1st connection part P1 contact | abuts to the guide surface 22 of the lock pin 3, with the movement to the direction of the protrusion cylinder part 12 of the 1st connection part P1, the lock pin 3 will be the spring member 4. It moves so as to be immersed in the insertion tube portion 11 against the urging force (see FIG. 3B). When the first connecting portion P1 further moves in the direction of the protruding cylindrical portion 12, the lock pin 3 is further immersed into the insertion cylindrical portion 11, and the tip of the lock pin 3 is moved to the first connecting portion P1 by the biasing force of the spring member 4. The first connecting portion P <b> 1 moves in the direction of the protruding cylinder portion 12 in a state in contact with the inner surface (see FIG. 3C).

  When the end portion of the first connecting portion P1 comes into contact with the end surface of the protruding cylindrical portion 12 and the connecting hole h coincides with the position of the lock pin 3 (opening portion 13), the biasing force of the spring member 4 causes the lock pin 3 to move. The tip protrudes outward from the outer peripheral surface of the first connecting portion P1 through the connecting hole h (see FIG. 3D). At this time, in the lock pin 3, since the guide surface 22 is constituted by one continuous surface, the middle of the guide surface 22 is not caught by the edge of the opening 13, and the lock pin 3 is smoothly connected to the connection hole. Projects into h. Further, since the lock pin 3 is attached to the center of the spring main body 31 which is curved of the spring member 4 and the lock pin 3 can be urged in the direction perpendicular to the axis of the apparatus main body 2, the lock pin 3 is straightened. Can be protruded.

  In addition, since the opening 13 is circular, if the shaft center of the locked lock pin 3 and the center of the opening 13 are decentered, the guide surface 22 is decentered. Projecting in a state of being in contact with the inner surface (inner edge) of the opening 13. However, since the lock pin 3 becomes thicker as the lock pin 3 protrudes, the lock pin 3 moves in a direction in which the axis of the lock pin 3 coincides with the center of the opening 13. As a result, the locking surface portion 23 of the lock pin 3 is not easily caught on the edge of the opening 13, and the lock pin 3 protrudes smoothly into the connecting hole h.

  And the front-end | tip of the lock pin 3 protrudes outward rather than the outer peripheral surface of the 1st connection part P1 through the connection hole h, and the base end of the guide surface 22 in the lock pin 3 is the inner surface of the 1st connection part P1. Therefore, even if the scaffold material A is pulled, the inner peripheral surface of the connection hole h comes into contact with the outer peripheral surface of the lock pin 3, and the lock pin 3 engages with the connection hole h. It will never come out. Thereby, it will be in the state where the insertion cylinder part 11 was locked with respect to the 1st connection part P1 of the scaffolding material A, and will be in the state by which the connection apparatus 1 for scaffolds was connected with the 1st connection part P1.

  On the other hand, when removing the scaffold coupling device 1 from the first coupling part P1 of the scaffold A, the lock pin 3 protruding from the coupling hole h of the first coupling part P1 is resisted against the biasing force of the spring member 4. The lock pin 3 is pressed down to the insertion tube portion 11 side until the locking surface portion 23 is inside the inner surface of the insertion tube portion 11. Thereafter, the lock pin 3 is moved toward the periphery of the opening 13 and the locking surface 23 is hooked on the edge of the opening 13 to lock (see FIG. 4B). As a result, a part of the distal end side of the lock pin 3 protrudes from the insertion tube portion 11, and at the same time, the proximal end of the guide surface 22 is inserted into the insertion tube portion 11 (center side from the inner surface) through the opening portion 13. It will be in a state (refer to Drawing 4 (a)).

  In this state, when the first connecting portion P1 is moved so that the scaffold connecting device 1 comes out of the first connecting portion P1 of the scaffold A (when moved in the direction of the arrow in FIG. 4A), the lock is locked. The connection hole h of the first connection part P1 comes into contact with the surface on the side where the second guide surface 24 is formed on the outer peripheral surface of the pin 3. Thereby, the lock pin 3 is pressed toward the rounded portion 14 side of the insertion tube portion 11, and the guide surface 22 of the lock pin 3 comes into contact with the inner peripheral surface of the opening portion 13. Then, the lock pin 3 is guided by the guide surface 22 pressed by the opening 13 and moves in the direction of immersing into the insertion tube portion 11 against the urging force of the spring member 4, and the tip of the lock pin 3 is moved. If it immerses more than the connection hole h, the lock | rock by the lock pin 3 will be cancelled | released. In this state, the scaffold coupling device 1 can be removed from the first coupling portion P1 by pulling out the insertion tube portion 11 from the first coupling portion P1.

  Next, the connection with the scaffold material A on the second connection part P2 side will be described. The scaffold coupling device 1 is coupled to the second coupling portion P2 so that the distance between the tips of the pair of second locking pins 5 facing backward is smaller than the inner diameter of the second coupling portion P2. The two lock pins 5 are pushed against the urging force of the second spring member 6 toward the insertion tube portion 11, and in this state, the scaffold coupling device 1 is connected to the end of the insertion tube portion 11 on the second opening 15 side. It inserts in the 2nd connection part P2 from a part side. And the end surface of the protrusion cylinder part 12 is made to contact | abut to the end surface of the 2nd connection part P2. In this state, when the scaffold coupling device 1 is rotated around its axis to coincide with the second lock pin 5 and the second coupling hole h2, the second lock pin 5 is moved by the urging force of the second spring member 6. It will be in the state where the front-end | tip protruded outward from the outer peripheral surface of the 2nd connection part P2 through the 2nd connection hole h2. Thereby, the insertion cylinder part 11 by the side of the 2nd opening part 15 of the connection apparatus 1 for scaffolds with respect to the 2nd connection part P2 of the scaffold material A will be in the locked state, and the connection apparatus for scaffolds to the 2nd connection part P2. 1 is connected.

  When removing the scaffold coupling device 1 from the second coupling part P2, the second lock pin 5 protruding from the second coupling hole h2 is moved against the urging force of the second spring member 6 to the second coupling part P2. Immerse inside than the inside. In this state, the scaffold coupling device 1 can be pulled out from the second coupling portion P2.

  As described above, the lock pin 3 side of the scaffold coupling device 1 is connected to the first connection part P1 of the scaffold material A, and the second lock pin 5 side is used as the second connection part P2 of another scaffold material A. Thus, the different scaffold materials A can be coupled by the scaffold coupling device 1.

  As described above, according to the scaffold coupling device 1 of the present embodiment, the guide surface 22 of the lock pin 3 is constituted by a single continuous surface, so that the guide surface 22 abuts against the edge of the opening 13. However, the guide surface 22 is not caught, and the lock pin 3 can be reliably protruded from the apparatus main body 2 (insertion cylinder part 11) by the urging force of the spring member 4.

  Further, since the lock pin 3 is urged by the spring member 4 in the direction perpendicular to the axis of the insertion tube portion 11, the lock pin 3 can be easily projected and retracted in the direction perpendicular to the axis of the apparatus main body 2. Therefore, after the lock pin 3 is inserted into the apparatus main body 2, the lock pin 3 can be reliably protruded by the biasing force of the spring member 4, and the scaffold members A can be easily connected.

  Furthermore, since the opening portion 13 of the apparatus main body 2 is circular, when the lock pin 3 protrudes from the state of being inserted into the insertion tube portion 11 by the biasing force of the spring member 4, the shaft core of the lock pin 3 is temporarily opened. Even if it is eccentric with respect to the center of the portion 13, the guide surface 22 abuts on the circular inner peripheral surface of the opening 13, so that the axis of the lock pin 3 opens as the lock pin 3 protrudes. It can be moved in a direction that coincides with the center of the portion 13. Accordingly, since the eccentricity with the opening 13 is eliminated as the lock pin 3 protrudes, the locking surface portion 23 is not caught on the edge of the opening 13 and the lock pin 3 can be reliably protruded. .

  The present invention has been described with reference to the preferred embodiments. However, the present invention is not limited to the above-described embodiments, and various improvements can be made without departing from the scope of the present invention as described below. And design changes are possible.

  For example, in the above embodiment, an example in which a curved flat plate spring is used as the spring member 4 is shown. However, the present invention is not limited to this, and the lock pin 3 is provided at one end as the spring member 4. A coil spring to which the proximal end of the lock pin 3 is attached, or a strip-like leaf spring to which the proximal end of the lock pin 3 is attached to the outer surface near one end portion may be used.

  Moreover, in said embodiment, although the connection part 1 for scaffolds of the structure from which the opening part 13 side and the 2nd opening part 15 side differ asymmetrically on the boundary from the protrusion cylinder part 12 was shown, it is not limited to this. The scaffold connecting device having the same configuration as that of the opening 13 side symmetrically with the protruding cylinder portion 12 as a boundary may be used.

DESCRIPTION OF SYMBOLS 1 Scaffolding coupling device 2 Device main body 3 Lock pin 4 Spring member 5 Second lock pin 6 Second spring member 11 Insertion cylinder part 12 Projection cylinder part 13 Opening part 14 Rounding part 15 Second opening part 22 Guide surface 23 Locking surface part 24 Second guide surface 25 Mounting portion 31 Spring main body 32 Bending portion 33 Operation piece A Scaffold material h connecting hole h2 second connecting hole P connecting portion P1 first connecting portion P2 second connecting portion

Japanese Patent No. 2543644 Japanese Patent No. 2548893

Claims (2)

Cylindrical insertion tube portion that can be inserted into a pipe-shaped portion of the scaffold, an annular protruding tube portion that protrudes over the entire circumference at an axially intermediate portion of the insertion tube portion, and an end that is more than the protruding tube portion An apparatus main body having an opening that is open to the outer peripheral surface of the insertion tube part on the part side;
A lock pin protruding and retracting in the direction perpendicular to the axis of the insertion tube through the opening;
A spring member attached to the lock pin and inserted into the insertion tube portion to urge the lock pin in a direction protruding from the opening;
The lock pin is
The lock pin is protruded from the opening by the urging force of the spring member, and the opening is opened toward the tip, with the outer side of the outer peripheral surface of the insertion cylinder as the base end. A guide surface that is inclined in a direction away from the end side of the insertion tube portion,
In the lock pin, at the base end of the guide surface or a position closer to the front end than the base end, the opening is formed in a direction perpendicular to the axis of the lock pin from a portion of the outer peripheral surface of the lock pin excluding at least the guide surface. It extends to a size allowing passage, and has a locking surface portion that can be locked to the edge of the opening when the lock pin is retracted against the urging force of the spring member. A scaffold connection device characterized by the above. The scaffold coupling device according to claim 1, wherein an opening of the device main body is opened in a circular shape.

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