Connection hook device for erection members in temporary structure

Abstract

To provide a connecting hook device for erection members such as scaffolding boards in a temporary structure such as a temporary scaffolding structure.SOLUTION: An attitude control device (36) is provided between a hook body (27) and a locking member (28), and comprises pressing means (38) that is biased toward the locking member from a fixed side fixed to the hook body via resilient biasing means (36) and receiving means (39) for the locking member that is engaged with the pressing means. The positional relationship between the pressing means (38) and the receiving means (39) is such that, when the locking member is in the locked attitude (P1), the pressing means (38) engages with the receiving means (39) to prevent the locking member from moving in the unlocking direction, but when a force in the unlocking direction that is greater than the biasing force of the resilient biasing means (36) is applied to the locking member, the movement in the unlocking direction is permitted.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present invention relates to a connecting hook device for erection members such as scaffolding boards in a temporary structure such as a temporary scaffolding structure. [Background technology]

[0002] Figures 1 and 2 show a temporary scaffolding structure as an example of a temporary structure, in which a set of two parallel pillars 1, 1 are arranged in a row at a predetermined interval, and each set of pillars 1, 1 is connected by a horizontal member 2 consisting of a cross member 2a.

[0003] In the example shown in the figure, support members 3 for fastening, consisting of flanges or the like, are fixed to the pillars 1 at a predetermined interval in the vertical direction, and gripping members 4 for fastening are fixed to both ends of the cross member 2a, forming a wedge fastening means in which the support members 3 are gripped by the gripping members 4 and fastened by driving wedges into them.

[0004] Therefore, a work floor as a work scaffold is formed by erecting an erection member 5 (hereinafter simply referred to as the "erecting member 5") consisting of a scaffolding board 5a on a horizontal member 2, 2 (hereinafter simply referred to as the "horizontal member 2") consisting of adjacent cross members 2a, 2a.

[0005] The erection members 5 are provided with connecting hook devices 6 at both ends in the longitudinal direction of the juxtaposed frames, and are connected to the horizontal members 2 in the transverse direction by the connecting hook devices 6.

[0006] The connecting hook device 6 is composed of a hook body 7 and a locking member 8 attached to the side surface of the hook body 7. The locking member 8 is generally called a drop lock.

[0007] The hook body 7 forms a notched holding space 9 having a downward opening 9a, and is configured to hold the horizontal member 2 from above.

[0008] The locking member 8 has a locking portion 8a at its lower end, and is attached along the side surface of the hook body 7 so as to be movable up and down in the locking direction R in which it rotates downward and in the unlocking direction F in which it rotates upward.

[0009] For this purpose, an upper pin 10 and a lower pin 11 are provided vertically spaced apart from each other on the side surface of the hook body 7. Correspondingly, an upper guide hole portion 12 and a lower guide hole portion 13 made of elongated holes are formed in the locking member 8, and the upper pin 10 and the lower pin 11 are inserted into the upper guide hole portion 12 and the lower guide hole portion 13, respectively.

[0010] As a result, when the locking member 8 moves in the locking direction R, the locking portion 8a enters the opening 9a and assumes a locking posture P1 (see Figures 2(A) and 2(C)) in which the horizontal member 2 held in the holding space 9 cannot escape from the holding space 9.

[0011] When moved in the unlocking direction F, the locking portion 8a is retracted from the opening 9a, and the horizontal member 2 is configured to assume an unlocking position P2 (see Figure 2 (B)) that enables the horizontal member 2 to escape from the holding space 9 (or enter the holding space 9 from below) through the opening 9a.

[0012] When the locking member 8 is moved in the unlocking direction F from the locked position P1 shown in Fig. 2(A) to the unlocked position P2 shown in Fig. 2(B), the upper guide hole portion 12 moves obliquely upward toward the upper part of the holding space 9 via the upper pin 10 as shown by the arrow F1. In contrast, the lower guide hole portion 13 moves obliquely upward toward a direction away from the holding space 9 via the lower pin 11 as shown by the arrows F2 and F3. As a result, the locking member 8 moves while rotating upward. Such movement of the locking member 8 in the unlocking direction F is performed by the operator moving the locking member 8 upward with his or her fingers.

[0013] When the locking member 8 is moved in the locking direction R from the unlocking position P2 shown in FIG. 2B to the locking position P1 shown in FIG. 2C, it moves in the locking direction R, which is the opposite direction to the unlocking direction F described above. That is, the upper guide hole portion 12 moves obliquely downward in a direction away from the holding space 9 via the upper pin 10 as shown by the arrow R1. In contrast, the lower guide hole portion 13 moves obliquely downward toward the lower side of the holding space 9 via the lower pin 11 as shown by the arrow R2. As a result, the locking member 8 moves while rotating downward. Such movement of the locking member 8 in the locking direction R is performed by the locking member 8 moving downward by its own weight. In other words, it moves downward by itself without the operator moving it downward with his or her fingers. This is why it is called a drop lock. [Prior art documents] [Patent documents]

[0014] [Patent Document 1] JP 2018-96099 A [Patent Document 2] Japanese Patent Application Publication No. 10-88790 Summary of the Invention [Problem to be solved by the invention]

[0015] As described above, the locking member in the conventional connecting hook device is called a drop lock, and moves in the locking direction R by its own weight, so that it is normally in the locked position P1.

[0016] Therefore, when connecting the hook body to the horizontal member, the worker must first move the locking member upward to the unlocked position P2 and hold that position with his / her fingers, then lower the hook body toward the horizontal member to hold it in the holding space, and then move the locking member downward by its own weight to hold it in the locked position P1. Therefore, there is a problem that the connection work is complicated.

[0017] Furthermore, when removing the hook body from the horizontal member, the worker must change the position of the locking member from the locked position P1 to the unlocked position P2, hold that position with his or her fingers, and then lift up the hook body to separate the holding space from the horizontal member. Therefore, there is a problem that the removal process is complicated.

[0018] Therefore, in order to solve the above problem, a connecting hook device has been proposed that is configured to easily maintain the position when the locking member is moved upward from the locked position P1 to the unlocked position P2 (Patent Document 2).

[0019] In the case of the connecting hook device proposed in Patent Document 2 (hereinafter referred to as the "prior art"), locking steps are formed in the upper guide hole and the lower guide hole of the above-mentioned locking member, and when the locking member is in the unlocked position, the upper pin and the lower pin are locked with the locking steps, so that the locking member does not move downward under its own weight. Therefore, the locking member can be maintained in the unlocked position without being held by the operator's fingers.

[0020] However, in the case of the prior art, the locking member is held in the unlocked position by simply engaging the pin with the locking step of the guide hole, so there is a risk that the engagement may easily come loose when subjected to vibration or impact from an external force, and if the engagement comes loose, there is a problem that the locking member will move to the locked position under its own weight during operation.

[0021] Incidentally, while the prior art aims to hold the locking member in the unlocked position, the inventors have found that it is desirable to configure the locking member so that it can be held in the locked position.

[0022] As described above, the locking member maintains the locked position by its own weight, and thus it has been conventionally considered that no means for maintaining the position other than its own weight is required. However, for example, in a multi-story scaffold, a part of a temporary scaffolding structure is constructed in a toppled state on the ground, and then it is raised up by pulling it up with a wire or the like. In this case, when the connecting hook device of the erection member is connected to the horizontal member of the toppled structure, the locking member does not move to the locked position by its own weight, so the worker moves it to the locked position by hand. However, in this state, the locking member is not maintained in the locked position, and can be easily moved to the unlocked position.

[0023] As a result, when the temporary scaffolding structure is raised from a lying position, vibration or impact can cause the locking member to move from the locked position to the unlocked position, which can cause the hook body to come off the horizontal member during raising, creating the risk of the erection member falling.

[0024] An object of the present invention is to provide a connecting hook device for erection members in a temporary construction structure which solves the above problems. [Means for solving the problem]

[0025] Therefore, the first means of the present invention is a connecting hook device for an erection member that is connected to a horizontal member in a temporary construction from a cross direction, and is composed of a hook body that holds the horizontal member by a holding space having a downward opening, and a locking member that is attached to the side of the hook body so as to be movable up and down and has a locking part at its lower end, and when the locking member moves in a locking direction by rotating downward, the locking part is inserted into the opening, thereby making the horizontal member unable to escape from the holding space, and when the locking member moves in an unlocking direction by rotating upward, the locking part is retracted from the opening, thereby making the horizontal member able to escape from the holding space. In a locking position, an attitude control device is provided between the hook body and the locking member, and the attitude control device is composed of a pressing means that is biased toward the locking member from a fixed side fixed to the hook body via a resilient biasing means, and a receiving means for the locking member that is engaged with the pressing means, and the positional relationship between the pressing means and the receiving means is such that, when the locking member is in the locked position, the pressing means engages with the receiving means to prevent movement of the locking member in the unlocking direction, but when a force in the unlocking direction greater than the biasing force of the resilient biasing means is applied to the locking member, movement in the unlocking direction is allowed.

[0026] In this case, the receiving means of the locking member constitutes first receiving means and second receiving means, and the first receiving means is configured to prevent movement of the locking member in the unlocking direction when a pressing means engages with the first receiving means while the locking member is in the locked position, but allows movement in the unlocking direction when a force in the unlocking direction greater than the biasing force of the resilient biasing means is applied to the locking member, and the second receiving means is configured to prevent movement of the locking member in the locked direction when a pressing means engages with the second receiving means while the locking member is in the unlocked position, but allows movement in the locked direction when a force in the locking direction greater than the biasing force of the resilient biasing means is applied to the locking member.

[0027] The second means of the present invention is a hook device for connecting an erection member to a horizontal member in a temporary construction from a cross direction, the hook device being composed of a hook body that holds the horizontal member by a holding space having a downward opening, and a locking member that is attached to the side of the hook body and has a locking part at its lower end, and holds the locking member so as to be movable up and down by inserting an upper pin and a lower pin that protrude from the side of the hook body into an upper guide hole and a lower guide hole that are respectively provided in the locking member, and when the locking member moves in a locking direction by rotating downward, the locking part enters the opening, making the horizontal member unable to escape from the holding space, and when the locking member moves in an unlocking direction by rotating upward, the locking part retracts from the opening, making the horizontal member unable to escape from the holding space. In a locking member configured to be placed in an unlocked position that enables the locking member to escape from the holding space, an attitude control device is provided between the hook body and the locking member, and the attitude control device is composed of a receiving means formed on the edge of a control hole portion extending between an upper guide hole portion and a lower guide hole portion of the locking member, and a pressing means that is biased toward the receiving means from a fixed side fixed to the hook body via a resilient biasing means, and the positional relationship between the pressing means and the receiving means is such that, when the locking member is in the locked position, the pressing means engages with the receiving means to prevent movement of the locking member in the unlocking direction, but when a force in the unlocking direction that is greater than the biasing force of the resilient biasing means is applied to the locking member, the movement in the unlocking direction is allowed.

[0028] In this case, the locking member forms valleys located on both sides of the peaks along the edge of the control hole portion, and each valley constitutes a first receiving means and a second receiving means. The first receiving means is configured to engage with the pressing means to prevent movement of the locking member in the unlocking direction when the locking member is in the locked position, but when a force in the unlocking direction that is greater than the biasing force of the resilient biasing means is applied to the locking member, the peaks overcome the pressing means to allow movement in the unlocking direction. The second receiving means is configured to engage with the pressing means to prevent movement of the locking member in the locked direction when the locking member is in the unlocked position, but when a force in the locking direction that is greater than the biasing force of the resilient biasing means is applied to the locking member, the peaks overcome the pressing means to allow movement in the locking direction.

[0029] Preferably, the peaks and valleys at the edge of the control hole are formed continuously in a wave-like shape, and the valleys on both sides of the peaks respectively constitute first and second receiving means, and when the pressing means moves from the first receiving means onto the peaks and passes the apex of the peaks, the resilient force of the pressing means applies a force in the unlocking direction to the locking member, and when the pressing means moves from the second receiving means onto the peaks and passes the apex of the peaks, the resilient force of the pressing means applies a force in the locking direction to the locking member.

[0030] In a preferred embodiment of the present invention, the locking member has an unlocking portion at its upper end, and is configured so that when the locking member is in the unlocked position, the unlocking portion enters the holding space of the hook body from above, and when the locking member is in the unlocked position and a horizontal member enters the holding space of the hook body, the horizontal member pushes the unlocking portion, thereby moving the locking member in the locking direction.

[0031] In a further preferred embodiment, the resilient biasing means is constituted by a helical spring having a ring portion and an arm portion extending from the ring portion, the pressing means is provided at the tip of the arm portion, and with the ring portion fixed by inserting at least one of the upper pin and the lower pin of the hook body through it, the pressing means is biased toward the edge of the control hole portion of the locking member via the arm portion. Effect of the Invention

[0032] According to the present invention, an attitude control device 36 is provided between the hook body 27 and the locking member 27, and the pressing means 38 biased by the resilient biasing means 37 is engaged with the receiving means 39 of the locking member 28, so that the locking member 28 is prevented from moving in the unlocking direction when in the locked attitude P1, and is permitted to move in the unlocking direction only when a force in the unlocking direction that is greater than the biasing force of the resilient biasing means 37 is applied. Therefore, the locking member 28, once in the locked attitude P1, will not move inadvertently in the unlocking direction due to subsequent vibration or light impact, and safety can be ensured. [Brief description of the drawings]

[0033] [Figure 1] Regarding a connecting hook device of the prior art, (A) is an oblique view showing the support pillars, horizontal members, and erection members that make up a temporary scaffolding structure, (B) is an oblique view showing the connecting hook device for the horizontal members and erection members in a separated state, and (C) is an oblique view showing the connecting hook device in a disassembled state. [Diagram 2] Regarding the function of the locking member in a conventional connecting hook device, (A) is a front view showing the locking member in a locked position, (B) is a front view showing the locking member moved in the unlocking direction to the unlocked position, and (C) is a front view showing the locking member moved in the locking direction to the locked position. [Diagram 3] FIG. 2 is a perspective view showing a connecting hook device for a horizontal member and an installation member in a separated state according to an embodiment of the present invention. [Figure 4]1 is a perspective view showing a disassembled state of a connecting hook device according to an embodiment of the present invention; [Diagram 5] 1A is a front view showing the arrangement of the upper and lower pins of the hook body and the slot of the locking member in a locked position according to an embodiment of the present invention, and FIG. 1B is a front view showing the relationship between the upper and lower guide hole portions in the slot and the upper and lower pins. [Figure 6] Regarding the operation of the locking member in an embodiment of the present invention, (A) is a front view showing the locking member in an intermediate position between the locked position and the unlocked position, (B) is a front view showing the locking member moved in the unlocking direction to the unlocked position, and (C) is a front view showing the locking member moved in the locking direction to the locked position. [Figure 7] FIG. 1A is a front view showing a slot in a locking member and upper and lower pins inserted into the slot, FIG. 1B is a perspective view of a helical spring that constitutes a posture control device, and FIG. 1C is a front view showing a posture control device constituted by a pressing means for the helical spring and a control hole, according to an embodiment of the present invention. [Figure 8] 13 is a front view showing the action of the attitude control means when the locking member is in the locked attitude. FIG. [Figure 9] 13 is a front view showing the action of the attitude control means when the locking member is in an intermediate position between the locked position and the unlocked position. FIG. [Figure 10] 13 is a front view showing the operation of the attitude control means when the locking member is in the unlocked attitude. FIG. [Figure 11] Regarding one example of a method for connecting a connecting hook device to a horizontal member, (A) is a front view showing the hook body facing the horizontal member from above, (B) is a front view showing the lower end of the locking member abutting the horizontal member, and (C) is a front view showing the horizontal member being embraced by the hook body and the locking member in a locked position. [Figure 12] 13A and 13B are views showing a state in which a locking member is in a locked position with respect to another embodiment of the attitude control means, where (A) is a front view and (B) is a cross-sectional view. [Figure 13]13A and 13B are views showing a state in which a locking member is in an intermediate position with respect to another embodiment of the attitude control means, in which (A) is a front view and (B) is a cross-sectional view. [Figure 14] 13A and 13B are views showing a state in which a lock member is in an unlocked position with respect to another embodiment of the attitude control means, in which (A) is a front view and (B) is a cross-sectional view. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0034] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description, the terms "upper" and "lower" refer to the positional relationship in the drawings, and are not related to the position of the interlocking hook device when it is used.

[0035] Fig. 3 shows a temporary scaffolding structure as an example of a temporary structure. Although not shown, the temporary scaffolding structure has two parallel columns 21, 21 arranged in a row at a predetermined interval, and each pair of columns 21, 21 is connected by a horizontal member 22 consisting of a cross member 22a. In the illustrated example, fastening support members 23 consisting of flanges or the like are fixed to the columns 21 at a predetermined interval in the vertical direction, and a wedge fastening means is configured to drive wedges into the support members 23 while they are held by holding members 24 fixed to both ends of the cross member 22a. This is the same as the prior art described above.

[0036] In the illustrated embodiment, a work floor as a work scaffold is formed by erecting an erection member 25 (hereinafter simply referred to as "erecting member 25") consisting of a scaffolding board 25a on horizontal members 22, 22 (hereinafter simply referred to as "horizontal member 22") consisting of adjacent cross members 22a, 22a.

[0037] The erection members 25 are provided with connecting hook devices 26 at both ends in the longitudinal direction of the juxtaposed frames, and are connected to the horizontal members 22 in the transverse direction by the connecting hook devices 26.

[0038] It should be understood that the erection member 25 on which the connecting hook device 26 of the present invention is provided is not limited to the scaffolding board 25a as shown in the figure, but includes, for example, baseboards provided along the side edges of the scaffolding board 25a, and various other members that are connected in an erected state to the horizontal member 22 in a cross direction.

[0039] As shown in FIG. 4, the connecting hook device 26 is composed of a hook body 27 and a locking member 28 attached to the side of the hook body 27, and is provided with an elastic biasing means 37 that constitutes the posture control device 36 described later.

[0040] The hook body 27 forms a notched holding space 29 having a downward opening 29a, and is configured to hold the horizontal member 22 from above.

[0041] As shown in Figures 5 to 10, the locking member 28 has a locking portion 28a at its lower end and an unlocking portion 28b at its upper end, and is attached along the side of the hook body 27 so as to be freely movable up and down in the locking direction R in which it rotates downward and in the unlocking direction F in which it rotates upward.

[0042] To enable attachment that allows free vertical movement, an upper pin 30 and a lower pin 31 are vertically spaced apart and protrude from the side surface of the hook body 27. In response to this, the locking member 28 is provided with a slot 32 extending in the locking direction R and the unlocking direction F.

[0043] The slot 32 includes an upper guide hole portion 32 and a lower guide hole portion 33, which are elongated holes through which the upper pin 30 and the lower pin 31 are inserted, and a control hole portion 34 is provided extending between the guide hole portions 32, 33. The control hole portion 34 constitutes an attitude control device 36, which will be described later, and is preferably formed by a hole that communicates with the guide hole portions 32, 33 as shown in the figure, but may also be formed by an independent hole that does not communicate with each other.

[0044] 5 and 6 show the vertical movement of the locking member 28 caused by the interaction between the upper pin 30, the lower pin 31, and the upper guide hole portion 32 and the lower guide hole portion 33. In other words, the posture control device 36 described below is not shown, and the trajectory of the rotational movement of the locking member 28 is explained.

[0045] The locking member 28 is configured such that, when moved in the locking direction R, the locking portion 28a enters the opening 29a and assumes a locking position P1 (see Figures 5(A) and 6(C)) in which the horizontal member 22 held in the holding space 29 cannot escape from the holding space 29.

[0046] When moved in the unlocking direction F, the locking portion 28a is retracted from the opening 29a, and the horizontal member 22 is configured to assume an unlocking position P2 (see FIG. 6B) in which the horizontal member 22 can escape from the holding space 29 (or can enter the holding space 29 from below) through the opening 29a. At this time, the unlocking portion 28b is inserted into the holding space 29 from above.

[0047] 5(B), the upper guide hole portion 32 has an upper end portion 32a that faces the upper pin 30 when in the locked position P1, and a lower end portion 32b that faces the upper pin 30 when in the unlocked position P2. In this case, in the locked position P1, the direction from the lower end portion 32b toward the upper end portion 32a is the unlocking direction F1, which faces obliquely upward toward the upper part of the holding space 29 as indicated by the angle θ1.

[0048] Meanwhile, the lower guide hole portion 33 has an upper end portion 33a that faces the lower pin 31 when in the locked position P1, and a lower end portion 33b that faces the lower pin 31 when in the unlocked position P2. In this case, in the locked position P1, the direction from the lower end portion 33b toward the upper end portion 33a is the unlocking direction F2, which faces obliquely upward in a direction away from the holding space 29 as indicated by the angle θ2.

[0049] FIG. 6(A) shows a state when the locking member 28 is in the intermediate position P3 (a position between the locked position P1 and the unlocked position P2). When an operator moves the locking member 28 upward from the locked position P1 shown in FIG. 5(A) with his / her fingers, the upper guide hole portion 32 moves obliquely upward toward the upper side of the holding space 29 via the upper pin 30. In contrast, the lower guide hole portion 33 moves obliquely upward toward the direction away from the holding space 29 via the lower pin 31. At this time, the unlocking direction F1 in which the upper guide hole portion 32 moves upward is rotated in a direction that reduces the angle θ1 (see FIG. 5(A)) when the locking position P1 is set, and in contrast, the unlocking direction F2 of the lower guide hole portion 33 is rotated in a direction that increases the angle θ2 (see FIG. 5(A)) when the locking position P1 is set. As a result, the locking member 28 moves while rotating upward.

[0050] Then, when the locking member 28 is further moved upward, it is moved until it assumes the unlocked position P2, as shown in Fig. 6(B). At this time, the unlocking direction F1 in which the upper guide hole portion 32 moves is changed to a sideways direction toward the holding space 29, and the unlocking direction F2 in which the lower guide hole portion 33 moves is changed to an obliquely upward direction approaching the holding space 29, thereby moving the locking member 28 while rotating.

[0051] As a result, the locking member 28 in the unlocked position P2 is in a state in which the locking portion 28a is retracted from the opening 29a of the holding space 29 and the unlocking portion 28b is advanced into the upper region of the holding space 29.

[0052] Thus, the illustrated embodiment of the present invention is characterized in that, when the locking member 28 moves upward from the intermediate position P3 to the unlocked position P2, the unlocking direction F1 of the upper guide hole portion 32 is changed to be substantially horizontally oriented, and the unlocking direction F2 of the lower guide hole portion 33 is changed to be obliquely upwardly oriented approaching the holding space 29. This characteristic change in direction is realized by the above-mentioned angles θ1 and θ2. And, by performing such a change in direction, the locking member 28 has the advantage of being able to fully insert the unlocking portion 28b into the upper region of the holding space 29 when the locking member 28 is set to the unlocked position P2.

[0053] When the operator moves the locking member 28 downward from the above state with his / her finger, the locking member 28 moves in a locking direction R opposite to the unlocking direction F described above, as shown in Fig. 6(C), and assumes the locked position P1 again. That is, the upper guide hole portion 32 moves obliquely downward via the upper pin 30 in a direction away from the holding space 29, as shown by arrow R1. In contrast, the lower guide hole portion 33 moves obliquely downward via the lower pin 31 toward the lower side of the holding space 29, as shown by arrow R2. That is, the locking member 28 moves while pivoting downward.

[0054] As a result, the locking member 28 in the locking position P1 has the unlocking portion 28b retracted from the upper region of the holding space 29 and the locking portion 28a inserted into the opening 29a of the holding space 29.

[0055] (Attitude control device) In the present invention, a posture control device 36 is provided between a hook body 27 including upper and lower pins 30, 31 on the fixed side and a lock member 28 on the movable side.

[0056] In the embodiment shown in FIGS. 7 to 11, the attitude control device 36 is composed of a pressing means 38 that is urged toward the locking member 28 from the fixed side via a resilient biasing means 37 formed by a helical spring 37A, and a receiving means 39 of the locking member 28 that engages with the pressing means 38, and the receiving means 39 is provided in the control hole portion 34 of the slot 35.

[0057] By providing the posture control device 36, when the locking member 28 is in the locked posture P1, the locking member 28 is prevented from moving in the unlocking directions F1, F2 by the engagement of the pressing means 38 with the receiving means 39, but is configured so that movement in the unlocking directions F1, F2 is permitted when a force in the unlocking directions F1, F2 that is greater than the elastic force of the pressing means 38 is applied.

[0058] In the illustrated embodiment, the posture control device 36 is configured such that, even when the locking member 28 is in the unlocked posture P2, movement in the locking directions R1, R2 is prevented by the pressing means 38 engaging with the receiving means 39, and movement in the locking directions R1, R2 is permitted when a force in the locking directions R1, R2 that is greater than the elastic force of the pressing means 38 is applied.

[0059] For this reason, as described below, the receiving means 39 is provided with a first receiving means 39a that engages with the pressing means 38 in the locked position P1, and a second receiving means 39b that engages with the pressing means 38 in the unlocked position P2. However, it should be understood that providing the second receiving means 39b is not an essential requirement in the present invention.

[0060] As shown in FIG. 7, the helical spring 37A has a first ring portion 37a and a second ring portion 37b wound in a coil shape by bending a steel wire, and is provided with an arm portion 37c extending from the first ring portion 37a. The pressing means 38 is formed by winding a tip end of the arm portion 37c in a small diameter coil shape.

[0061] Thus, with the helical spring 37A fixed by extrapolating each or at least one of the first ring portion 37a and the second ring portion 37b onto the upper pin 30 and the lower pin 31 of the hook body 27, the pressing means 38 is elastically contacted toward the edge of the control hole portion 34 in the locking member 28 via the arm portion 37c.

[0062] In the illustrated embodiment, the receiving means 39 is composed of a first receiving means 39a that receives the elastic contact of the pressing means 38 when the locking member 28 is in the locked position P1, and a second receiving means 39b that receives the elastic contact of the pressing means 38 when the locking member 28 is in the unlocked position P2.

[0063] As a specific example, a peak 39c and valleys located on both sides of the peak 39c are formed along the edge of the control hole 34, and the first receiving means 39a and the second receiving means 39b are constituted by the respective valleys. In this case, it is preferable that the peak and valley have a shape of connected arcs to form a wave shape.

[0064] 8 to 10 show the operation of the attitude control device 36. FIG.

[0065] 8, when the locking member 28 is in the locked position P1, the pressing means 38 is in elastic contact with the first receiving means 39a in an engaged state, preventing the locking member 28 from moving in the unlocking directions F1, F2. In other words, even if the locking member 28 is subjected to vibration or a slight impact in this state, the locking member 28 will not move in the unlocking directions F1, F2, and will maintain the locked position P1.

[0066] From this state, when the operator strongly pushes up the locking member 28 with his / her fingers or the like, the pressing means 38 is pressed by the peak portion 39c, allowing the locking member 28 to move in the unlocking directions F1, F2, as shown in Fig. 9. At this time, the pressing means 38 retracts in a state of elastic contact with the peak portion 39c through the elastic deformation of the arm portion 37c and / or the first ring portion 37a of the helical spring 37A, allowing the locking member 28 to move.

[0067] Thereafter, when the locking member 28 is in the unlocked position P2, the pressing means 38 is in elastic contact with the second receiving means 39b in an engaged state, preventing the locking member 28 from moving in the locking directions R1, R2, as shown in Fig. 10. In other words, in this state, even if the locking member 28 is subjected to vibration or a slight impact, the locking member 28 will not move in the locking directions R1, R2, and will maintain the unlocked position P2.

[0068] In order to move the locking member 28 from the unlocked position P2 in the locking directions R1, R2 and return it to the locked position P1, the above-mentioned operations may be performed in the opposite direction.

[0069] As is clear from the above operation, in the illustrated embodiment, the pressing means 38 is in elastic contact with the first receiving means 39a in an engaged state when in the locked position P1, and in elastic contact with the second receiving means 39b in an engaged state when in the unlocked position P2. However, the pressing means 38 does not necessarily need to be in elastic contact with the valleys of the first receiving means 39a or the second receiving means 39b. In other words, even if the pressing means 38 is not in contact with the valleys, it can fulfill the function of maintaining the position of the locking member 28 as long as it is engaged with the valleys while being restrained by the peaks 39c.

[0070] (Method of connecting a connecting hook device to a horizontal member) When the connecting hook device 26 of the above embodiment is connected to the horizontal member 22, the operator moves the locking member 28 upward with his / her fingers to hold it in the unlocked position P2, and in this state, the horizontal member 22 is inserted into the holding space 29 of the hook main body 27 to be held, and then the operator moves the locking member 28 downward with his / her fingers to hold it in the locked position P1. As a result, the locking member 28, once in the locked position P1, will not inadvertently move in the unlocked direction due to subsequent vibration or light impact, ensuring safety. Suruko

[0071] On the other hand, the connecting hook device 26 having the above-mentioned configuration allows a connecting method as shown in FIG. 11, which makes the operation simple and easy.

[0072] To enable such a connection method, the locking member 28 is formed with an arc-shaped guide portion 28c extending from the locking portion 28a toward the outer edge portion.

[0073] 11(A), with the locking member 28 kept in the locked position P1, the hook body 27 is moved toward the horizontal member 22, and the guide portion 28c is brought into contact with the peripheral surface of the horizontal member 22. When the hook body 27 is pressed down from this state, the guide portion 28c slides along the peripheral surface of the horizontal member 22, as shown in FIG. 11(B), thereby moving the locking member 28 in the unlocking direction to the unlocked position P2. At this time, as described above, the position control device 36 allows the locking member 28 to move by causing the peak portion 39c to climb over the pressing means 38.

[0074] When the horizontal member 22 enters the holding space 29 and the hook body 27 is further moved downward, as shown in FIG. 11(C), the unlock portion 28b of the locking member 28 comes into contact with the horizontal member 22 and is pushed up, moving the locking member 28 in the locking direction to the locked position P1.

[0075] In this way, the connecting hook device 26 is configured so that, simply by moving the hook body 27 toward the horizontal member 22 while the locking member 28 is kept in the locked position P1, the locking member 28 is automatically brought into the unlocked position P2 to embrace the horizontal member 22, and furthermore, the locking member 28 is automatically brought into the locked position P1 again.

[0076] This action is made possible by providing the guide portion 28c on the locking member 28, and by the configuration of the receiving means 39 that supports the resiliently biased pressing means 38 of the attitude control device 36, as described above, which is located on the edge of the control hole portion 34 and has first receiving means 39a and second receiving means 39b formed by a wave-like arc-shaped peak portion 39c and valley portions on both sides of the peak portion 39c.

[0077] That is, as shown in FIG. 9, in an intermediate position P3 between the locked position P1 and the unlocked position P2, the pressing means 38 is pressed against the climbed-up ridge 39c with a resilient force, so that when the pressing means 38 passes the apex of the ridge 39c, the pressing force acts as a force that promotes the upward or downward movement of the locking member 28 (movement in the unlock or lock direction).

[0078] For this reason, when the locking member 28 is moved from the locked position P1 toward the intermediate position P3 as shown in FIG. 11(B), as soon as the locking member 28 passes beyond the intermediate position P3, the elastic biasing force of the pressing means 38 acts, and the locking member 28 is moved in one go toward the unlocked position P2.

[0079] Furthermore, when the locking member 28 is moved from the unlocked position P2 toward the intermediate position P3 as shown in FIG. 11(C), as soon as the locking member 28 passes the intermediate position P3, the elastic force of the pressing means 38 acts, causing the locking member 28 to move in one go toward the locked position P1.

[0080] (Another embodiment of the attitude control device) 12-14 show another embodiment of the attitude control device 36. In FIG.

[0081] The fixed hook body 27 is provided with a resilient biasing means 37 constituted by a compression coil spring 37B housed in a housing 40, and is supported on the opening edge of the housing 40 with a pressing means 38 consisting of a ball biased in a direction protruding from the housing 40.

[0082] In contrast, the locking member 28 forms receiving means 39 that is located on the surface facing the hook body 27 and has a recess that can be engaged with the pressing means 38. The receiving means 39 is composed of first receiving means 39a that engages with the pressing means 38 when the locking member 28 is in the locked position P1, and second receiving means 39b that engages with the pressing means 38 when the locking member 28 is in the unlocked position P2.

[0083] 12, when the locking member 28 is in the locked position P1, the pressing means 38 is in elastic contact with the recess that constitutes the first receiving means 39a in a fitted state, making it difficult for the locking member 28 to move in the unlocking direction.

[0084] From this state, when an operator moves the locking member 28 with his / her fingers, that is, when he / she applies a force in the unlocking direction that is greater than the biasing force of the resilient biasing means 37, the first receiving means 39a is disengaged from the pressing means 38, as shown in FIG. 13, and the locking member 28 is moved to the intermediate position P3.

[0085] When the locking member 28 moves to the unlocked position P2, the pressing means 38 elastically contacts the recess that constitutes the second receiving means 39b in a fitted state, as shown in Fig. 14. This makes it difficult for the locking member 28 to move in the locking direction.

[0086] When moving the locking member 28 in the locking direction from the unlocked position P2 to the locked position P1, a force in the locking direction that is greater than the biasing force of the resilient biasing means 37 is applied to the locking member 28, in contrast to the above. [Explanation of symbols]

[0087] 21 Post 22 Horizontal Members 22a Horizontal member 23 Support member 24 Gripping member 25 Construction members 25a Scaffolding board 26 Connecting hook device 27 Hook body 28 Locking member 28a Lock section 28b Unlock section 28c Guide section 29 Holding space 29a opening 30 Top Pin 31 Lower pin 32 Upper guide hole 33 Lower guide hole 34 Control hole 35 Slots 36 Attitude control device 37 Resilient energizing means 37A String Spring 37B coil spring 37a, 37b ring section 37c Arm section 38 Pressing means 39 Receiving means 39a First receiving means 39b Second receiving means 39c Yamabe 40 Housing R1, R2 lock direction F1, F2 unlock direction P1 Locked position P2 unlocked position P3 intermediate posture

Claims

1. A connecting hook device for an erection member that is connected to a horizontal member in a temporary structure from a cross direction, The hook body (27) has a holding space with a downward opening for holding the horizontal member, and a locking member (28) is attached to the side of the hook body so as to be movable up and down and has a locking portion (28a) at its lower end. The locking member (28) is configured to be in a locked position (P1) in which the horizontal member cannot escape from the holding space by inserting the locking portion into the opening when moved in a locking direction in which it rotates downward, and to be in an unlocked position (P2) in which the horizontal member can escape from the holding space by retracting the locking portion from the opening when moved in an unlocking direction in which it rotates upward, and a position control device (36) is provided between the hook body (27) and the locking member (28), The posture control device (36) is composed of a pressing means (38) that is biased toward the locking member from a fixed side fixed to the hook body via a resilient biasing means (36), and a receiving means (39) for the locking member that is engaged with the pressing means, A connecting hook device for installation members in a temporary structure, characterized in that the positional relationship between the pressing means (38) and the receiving means (39) is configured so that, when the locking member is in the locked position (P1), the pressing means (38) engages with the receiving means (39) to prevent the locking member from moving in the unlocking direction, but when a force in the unlocking direction greater than the urging force of the resilient urging means (36) is applied to the locking member, the movement in the unlocking direction is allowed.

2. The receiving means (39) of the locking member comprises a first receiving means (39a) and a second receiving means (39b), the first receiving means (39a) is configured to prevent the locking member from moving in the unlocking direction when the pressing means (38) engages with the first receiving means (39a) in a state in which the locking member is in the locked position (P1), but allows the locking member to move in the unlocking direction when a force in the unlocking direction that is greater than the biasing force of the resilient biasing means (36) is applied to the locking member; 2. The connecting hook device for installation members in a temporary structure according to claim 1, characterized in that, when the locking member is in the unlocked position (P2), the second receiving means (39b) is engaged with a pressing means (38) to prevent the locking member from moving in the locking direction, but is configured to allow the locking member to move in the locking direction when a force in the locking direction greater than the biasing force of the resilient biasing means (36) is applied to the locking member.

3. A connecting hook device for an erection member that is connected to a horizontal member in a temporary structure from a cross direction, The hook body (27) holds the horizontal member by using a holding space having a downward opening, and a locking member (28) attached to the side of the hook body and having a locking portion (28a) at its lower end. An upper pin (30) and a lower pin (31) protruding from the side of the hook body are inserted into an upper guide hole portion (32) and a lower guide hole portion (33) formed in the locking member (28), respectively, to hold the locking member so as to be movable up and down. The locking member (28) is configured to be in a locked position (P1) in which the locking portion enters the opening and prevents the horizontal member from escaping from the holding space when moved in a locking direction in which it rotates downward, and to be in an unlocked position (P2) in which the locking portion retreats from the opening and allows the horizontal member to escape from the holding space when moved in an unlocking direction in which it rotates upward, and a position control device (36) is provided between the hook body (27) and the locking member (28), The attitude control device (36) is composed of a receiving means (39) formed on the edge of a control hole portion (34) extending between the upper guide hole portion and the lower guide hole portion of the locking member, and a pressing means (38) biased toward the receiving means from a fixed side fixed to the hook body via a resilient biasing means (37), a connecting hook device for installation members in a temporary structure, characterized in that the positional relationship between the pressing means (38) and the receiving means (39) is configured such that, when the locking member is in the locked position (P1), the pressing means (38) engages with the receiving means (39) to prevent the locking member from moving in the unlocking direction, but when a force in the unlocking direction greater than the urging force of the resilient urging means (37) is applied to the locking member, the locking member is allowed to move in the unlocking direction.

4. the lock member (28) forms valleys located on both sides of a peak (39c) along an edge of the control hole (34), and the respective valleys constitute a first receiving means (39a) and a second receiving means (39b); The first receiving means (39a) is configured to engage with the pressing means (38) to prevent the locking member from moving in the unlocking direction when the locking member is in the locked position (P1), but when a force in the unlocking direction that is greater than the urging force of the resilient urging means (37) is applied to the locking member, the ridge portion (39c) overcomes the pressing means (38) to allow the locking member to move in the unlocking direction.

4. The connecting hook device for construction members in a temporary structure according to claim 3, characterized in that the second receiving means (39b) prevents movement of the locking member in the locking direction by engaging with the pressing means (38) when the locking member is in the unlocked position (P2), but is configured so that when a force in the locking direction greater than the biasing force of the resilient biasing means (37) is applied to the locking member, the ridge portion (39c) overcomes the pressing means (38), thereby allowing movement in the locking direction.

5. The ridges and valleys at the edge of the control hole portion (34) are continuously formed in a wave shape, and the valleys on both sides of the ridges (39c) respectively constitute a first receiving means (39a) and a second receiving means (39b), When the pressing means (38) moves from the first receiving means (39a) onto the ridge portion (39c) and exceeds the apex of the ridge portion, a force in the unlocking direction is applied to the lock member by the resilient biasing force of the pressing means (38), 5. The connecting hook device for installation members in a temporary structure according to claim 4, characterized in that, when the pressing means (38) moves from the second receiving means (39b) onto the crest (39c) and exceeds the apex of the crest, a force in the locking direction is applied to the locking member by the resilient biasing force of the pressing means (38).

6. The locking member (28) has an unlocking portion (28b) at its upper end, and is configured to cause the unlocking portion (28b) to enter the holding space (29) of the hook body (27) from above when the locking member (28) is in the unlocked position (P2).

6. The connecting hook device for erection members in a temporary structure according to claim 3, 4 or 5, characterized in that, when a horizontal member (23) is inserted into the embracing space (29) of the hook body with the locking member (28) in the unlocked position (P2), the horizontal member (23) pushes the unlocking portion (28b), thereby moving the locking member (28) in the locking direction.

7. The resilient biasing means (37) is composed of a helical spring (37A) having a ring portion and an arm portion extending from the ring portion, and the pressing means (38) is provided at the tip of the arm portion.

6. The connecting hook device for erection members in a temporary structure according to claim 3, 4 or 5, characterized in that, in a state where the ring portion is fixed by inserting at least one of the upper pin and the lower pin of the hook body through it, the pressing means (38) is biased toward the edge of the control hole portion (34) of the locking member (28) via the arm portion (37c).

Images