JP6118685B2 - Chain trigger - Google Patents

Description

  The present invention relates to a chain trigger for easily and reliably attaching a chain used for adjusting the verticality of a formwork for constructing a concrete building or a concrete wall to the formwork.

  Conventionally, the formwork has been installed in a state in which vertical flaps made of piers and the like are provided on the back surface at predetermined intervals, and horizontal flaps made of two sets of steel pipes, etc. are horizontal to those vertical flaps. In addition, the horizontal butterfly material is fastened and fixed by a mold fastening metal fitting attached to the panel. Then, the pipe support is supported by a formwork such as a horizontal flap, and the chain with the turnbuckle attached is directly hooked to the horizontal flap, and the formwork is pushed up by the pipe support or caused by the chain. Adjust the verticality of the constructed formwork.

  Here, in order to hang the chain on the horizontal butterfly material, for example, in the hanging metal fitting of Patent Document 1, a hardware consisting of a hook portion and a ring portion is hooked on one horizontal butterfly material, and a turnbuckle is attached to the ring portion. The tip of the provided chain is locked, and the chain is tensioned by a turnbuckle to attract the concrete retaining wall formwork to the ground side.

JP 2002-327544 A

  However, in the hanging metal fitting described in Patent Document 1 described above, the chain with respect to the formwork becomes farther away from the formwork as the position (position where the chain is fixed to the slab or the like) that becomes the reaction force of the tension that acts when the chain is tightened is further away. This increases the angle of the hook, which causes the problem of reducing the tension effect of the chain by spreading the part where the ring is attached with the bent part of the hook as a fulcrum, and the hardware itself rotates. The problem of badness appears remarkably.

  In addition, the work to adjust the verticality of the formwork will cause the panel to which the formwork clamp is attached if a tension is applied on the axis of the formwork clamp, so that the work efficiency is improved. The best. However, the hanging metal fitting described in the above-mentioned Patent Document 1 is a type that hooks only on the upper one of the two sets of horizontal flaps, so that when the chain is tensioned, the mold clamp Tensile force acts on the upper horizontal butterfly at a position deviated from the axial center. Therefore, since not only the tension force but also the bending force acts on the mold clamping metal fitting, there is room for improvement in terms of the efficiency of adjusting the verticality.

  The present invention has been made in view of such problems, and can be easily hooked to a horizontal butter material, and the work efficiency can be improved without rotating the hardware itself even if the chain is tensioned. An object of the present invention is to provide a chain trigger in which the tension effect is difficult to reduce and the work efficiency for adjusting the verticality of the formwork is improved.

In order to solve the above-mentioned problems, the chain trigger according to the present invention has a panel with vertical flaps provided on the back surface at predetermined intervals, and the upper and lower horizontal flaps are used as the vertical flaps. A chain trigger that is used to hook the chain against a formwork that is held in a horizontal state and that is fixed by tightening the horizontal butterfly material with the formwork clamps attached to the panel. The upper horizontal butter material latching portion, the lower horizontal butter material latching portion, the upper horizontal butter material latching portion and the lower horizontal buttery material latching portion. An upper side horizontal filler material having an intermediate side extension portion extending from the middle of the stop portion to a side opposite to the mold through a gap between the upper side and lower side horizontal flap materials. The latching portion is provided with an upper horizontal butterfly contact portion having a shape corresponding to the cross-sectional shape of the upper horizontal butterfly material. On the other hand, the lower horizontal butter material latching portion is provided with a lower horizontal butter material abutting portion having a shape corresponding to the cross-sectional shape of the lower horizontal butter material, and at the tip of the intermediate lateral extension portion. A chain locking portion for locking the chain is provided, and at least one of the upper horizontal butterfly material latching portion and the lower horizontal butterfly material latching portion has an upper or lower horizontal flap. A projecting latching part that projects and latches to the upper or lower part of the material is provided.
Here, the protruding latching portion is provided at least in the upper side horizontal material latching portion, and the chain locking portion provided at the tip of the intermediate side extending portion is preferably bent downward. .
Further, it is further preferable that the intermediate side extending portion has at least a part of a cross section orthogonal to the shaft body direction smaller than the upper horizontal butter material latching portion, the lower horizontal butter material latching portion, and the chain locking portion.

According to the chain trigger of the present invention, the upper side horizontal material (hereinafter referred to as the upper side horizontal material) and the lower side horizontal material (hereinafter referred to as the lower side horizontal material) are disposed on the upper side. The upper horizontal butter material abutting portion and the lower horizontal butter material abutting portion of the butter material latching portion are respectively latched, and the upper horizontal butter material latching portion and the lower lateral butterfly are latched. The projecting latching portion is provided at one end of the material latching portion, and the intermediate side extending portion passes through the gap between the upper horizontal butterfly material and the lower lateral butterfly and the formwork Since it extends to the opposite side, even if the chain tip is hooked on the chain locking portion and the chain is tensioned, the hardware itself does not rotate and the working efficiency is improved.
In addition, since the intermediate side extension part to which the chain is locked is provided between the upper horizontal butterfly material and the lower horizontal butterfly material, even if the chain is tensioned, the upper horizontal butterfly material or the lower horizontal butterfly material The deformation of the intermediate lateral extension portion is suppressed, and the reduction of the chain tension effect can be suppressed.
In addition, since the horizontal flap material is hooked on the upper horizontal flap material latching portion and the lower horizontal flap material latching portion, respectively, when tension is applied to the chain, Since the force acts equally on both of the horizontal flaps, the efficiency of the work of adjusting the verticality of the formwork is improved.

It is a figure which shows the usage example of the chain trigger which concerns on this invention. (A)-(c) It is a front view, a right side view, and a bottom view showing an example of a chain trigger according to the present invention. It is an expansion perspective view of A part in FIG. (A), (b) is the enlarged front view of B section in Drawing 1, and an enlarged plan view, respectively. It is a front view which shows the other example of the chain trigger which concerns on this invention. It is a front view which shows the further another example of the chain trigger which concerns on this invention. It is a front view which shows the further another example of the chain trigger which concerns on this invention.

  Next, an embodiment of the chain trigger 1 according to the present invention will be described.

  For example, as shown in FIG. 1, the chain trigger 1 includes a panel 4 in which a crosspiece (vertical flap material) 3 is provided on the back surface at predetermined intervals, and an upper side and a lower side made of a pipe having a circular cross section. Are used to hook the chain 5 on the formwork fastened and fixed by the formwork fastening metal fitting 23 attached to the panel 4.

  The chain trigger 1 of the embodiment is configured by cutting a single metal plate (steel plate) having a predetermined thickness as shown in FIGS. 2 (a) to 2 (c). Upper horizontal butter material hooking portion 11 hooked on the lower horizontal butterfly material hook 22, lower horizontal butterfly material hooking portion 12 hooked on the lower horizontal butterfly material 22, upper horizontal butterfly material hooking portion 11 and lower horizontal butterfly An intermediate side extending portion 13 extending from the middle of the material latching portion 12 to a side opposite to the mold frame through a gap between the upper side horizontal butter material 21 and the lower side horizontal butter material 22; Have

  The upper horizontal butter material latching portion 11 is provided with a projecting latching portion 11b that projects to the upper portion of the upper horizontal butterfly material 21 at the upper end thereof, and the upper horizontal butter material 21 made of a circular pipe. The upper horizontal butterfly material abutting portion 11a is formed in a substantially semicircular shape so as to abut on the outer peripheral surface of the upper horizontal butterfly material 21 corresponding to the cross-sectional shape and the diameter of the upper horizontal butterfly material 21. In other words, the upper lateral butter material latching portion 11 is in contact with the upper lateral butterfly material corresponding to approximately half of the circumference of the outer circumferential surface of the upper lateral butter material 21 together with the inner surface of the projecting latching portion 11b. The part 11a is formed. Here, if the shape of the upper side butterfly material contact portion 11a corresponds to the cross-sectional shape and diameter of the upper side butterfly material 21, it is not necessary to completely match the upper side butterfly material contact portion of the present embodiment. The shape of 11a is also a part of an oval circumference that is slightly longer in the vertical direction in consideration of the workability of rotation of the chain trigger 1 itself when hooked to the upper horizontal butter material 21. In FIG. 2 (a), the length X from the left side surface of the upper side butterfly material engaging portion 11 opposite to the upper side butterfly material abutting portion 11a to the tip end portion of the protruding hooking portion 11b is generally Since the width of the crosspiece 3 of the formwork used is about 48 mm to 60 mm, it is set smaller than that.

  Similarly to the upper horizontal butter material contact portion 11a, the lower horizontal butter material latching portion 12 has a lower horizontal butterfly material formed corresponding to the cross-sectional shape of the lower horizontal butter material 22 made of a circular tube material. A contact portion 12a is formed. In addition, the protrusion part 11b is not provided in the lower end part of the lower side butterfly material latching part 12, but the lower end part is extended below as shown to Fig.2 (a).

  As shown in FIG. 2A and the like, the intermediate side extending portion 13 extends laterally from a continuous portion between the upper side butterfly material latching portion 11 and the lower side butterfly material latching portion 12. In addition, a chain locking portion 14 that is bent obliquely downward is provided at the tip portion. The chain locking portion 14 is formed with a chain locking hole 14a for locking the hook 51 provided at the tip of the chain 5, and the chain locking hole 14a is obliquely downward like the chain locking portion 14. It is formed as a long hole extending in the direction.

  The upper side surface 13 a of the intermediate side extending portion 13 is linear to the chain locking portion 14, while the lower side surface 13 b of the intermediate side extending portion 13 is the lower side of the lower lateral flap material latching portion 12. The horizontal butterfly material contact portion 12a and the lower side surface of the chain locking portion 14 are continuously curved so as to be in contact with the outer peripheral surface of the lower horizontal butterfly material 22. Since the middle side extending portion 13 is installed in a gap between the upper side butter material 21 and the lower side butter material 22, when the chain 5 is tensioned, the middle side extending portion 13 has a bending force. It will not be deformed even if it works. Therefore, as shown in FIG. 2A and the like, a part of the cross section orthogonal to the shaft body direction is smaller than the upper horizontal butterfly material latching portion 11, the lower horizontal butterfly material latching portion 12, and the chain latching portion 14. It can be formed and a reasonable weight reduction can be achieved.

  Next, the usage method and the effect of the chain trigger 1 configured as described above will be described.

  First, as shown in FIG. 1, in order to construct a concrete wall 7 on a concrete slab (floor surface) 6, a panel 4 in which piers (vertical butter) 3 are provided on the back surface at predetermined intervals, The upper and lower horizontal flaps 21 and 22 made of a pipe having a circular cross section are brought into contact with the crosspieces 3 in a horizontal state, and are fastened and fixed by a mold fastening bracket 23 attached to the panel 4. Assembling and supporting the pipe support 9 via the support fitting 8 fixed on the concrete slab 6 surface in the formwork.

  For example, as shown in FIG. 3, the support fitting 8 has an anchor hole 82 aligned with a position of an anchor bolt 81 (see FIG. 1) embedded in a predetermined position on the concrete slab 6, and a nut (not shown). )) To fix. In FIG. 3, the support fitting 8 is formed with a chain locking hole 83 in which the hook 52 b on the lower end side of the turnbuckle 52 is locked.

  As shown in FIG. 1, the pipe support 9 includes a base plate 91 that abuts on the support metal fitting 8, a waist tube 92 to which the base plate 91 is joined, and an insertion tube 93 that is inserted into the waist tube 92 so as to freely advance and retract. The receiving plate 94 is joined to the end of the insertion tube 93 and the lower end of the panel 4 comes into contact with the receiving plate 94. Then, by changing the length of the insertion tube 93 with respect to the lumbar tube 92 with a support pin, an adjusting screw or the like (not shown), a pressing force can be applied to the mold in an inclined state.

  As shown in FIGS. 4 (a) and 4 (b), the chain 5 is provided with a hook 51 for hooking on the chain trigger 1 of the present embodiment on the tip side, as shown in FIG. Further, the hook 52a on the upper end side of the turnbuckle 52 is connected to the lower end side. The hook 52b on the lower end side of the turnbuckle 52 is locked in the chain locking hole 83 of the support fitting 8 as shown in FIG. In FIG. 4, the panel 4 is fitted with a mold clamp 23 for fixing the horizontal flaps 21 and 22 to the mold and maintaining a constant distance from the opposing panel (form) 4. Yes.

  Next, the chain catching portion 14 of the chain trigger 1 is grasped and inserted into the gap between the upper side butterfly material 21 and the lower side butterfly material 22 in a substantially horizontal state. For example, even when the chain trigger 1 is rotated, the insertion amount is inserted so that the protruding latching portion 11b of the upper lateral flap material latching portion 11 is not caught on the outer peripheral surface of the upper lateral flap material 21.

  Next, the chain trigger 1 inserted in the gap between the upper horizontal butter material 21 and the lower horizontal butter material 22 is rotated about 90 degrees and pulled forward, so that the upper horizontal butter material latching portion 11 and the lower side The horizontal flap members 21 and 22 are brought into contact with the horizontal flap member 12.

  In addition, after the chain trigger 1 is attached to a predetermined location, the chain 5 is locked. At this time, the lower side surface of the projecting latching portion 11b of the chain trigger 1 is the upper part of the outer peripheral surface of the upper horizontal flap 21. Since the lower side surface 13b of the intermediate side extending portion 13 is in contact with the upper side of the outer peripheral surface of the lower horizontal butter material 22, the chain trigger 1 is connected to the upper horizontal butter material 21 and the lower horizontal butterfly. The state of being hooked on the material 22 can be maintained. Therefore, when the chain 5 is locked, it is not necessary to correct the direction of the chain trigger 1, so that the workability is improved. Further, the chain locking portion 14 provided at the distal end portion of the intermediate side extending portion 13 is bent obliquely downward, and the center of gravity of the chain trigger 1 itself is directed to the lower horizontal butter material latching portion 12 side. Therefore, the projecting latching portion 11b and the upper lateral butterfly material 21 are more firmly in contact with each other, and the state of being latched more stably can be maintained.

  Moreover, in the chain trigger 1 of this embodiment, the protrusion latching part 11b is provided only in the upper side horizontal material latching part 11. FIG. In the case of this form, the chain trigger 1 is inserted into a gap between the upper horizontal butter member 21 and the lower horizontal butter member 22 and rotated 90 degrees. What is necessary is just to tilt and incline so that the upper side horizontal material latching part 11 may be inserted in the back so that it may not catch on the outer peripheral surface of the material 21, and it may rotate. On the other hand, in the case where the protruding latching portions 11b are provided on both the upper horizontal butterfly material latching portion 11 and the lower lateral butterfly material latching portion 12, in order to rotate so as not to be caught by the horizontal butterfly materials 21 and 22, It is necessary to insert it farther than in the case of the present embodiment, and the intermediate side extending portion 13 becomes longer. Therefore, if the protruding latching portion 11b is provided only in the upper side horizontal material latching portion 11, the intermediate side extending portion 13 is shortened, and the weight of the chain trigger 1 can be reduced by that much, and workability is improved. Can be improved.

  Next, the chain locking hole 14a of the chain trigger 1 in a state of being held in a substantially vertical state by both the upper side horizontal material 21 and the lower side horizontal material 22 is shown in FIGS. 4 (a) and 4 (b). As shown in FIG. 3, the hook 52b on the rear end side of the turnbuckle 52 connected to the rear end side of the chain 5 via the hook 52a is hooked with the hook 51 on the front end side of the chain 5 as shown in FIG. 8 is locked in the chain locking hole 83.

  Then, the verticality of the mold is adjusted by pushing up the mold configured as described above by the pressing force of the pipe support 9 or by the tension of the chain 5, the turnbuckle 52, or the like. .

  Therefore, according to the chain trigger 1 of the present embodiment, the upper horizontal butter material abutment portion 11a and the lower side of the upper horizontal butter material hooking portion 11 are arranged on the outer peripheral surfaces of the upper horizontal butter material 21 and the lower horizontal butter material 22. The lower side butter material abutting portion 12a of the horizontal butter material latching portion 12 is latched, and the middle side extending portion 13 is connected to the upper side butter material latching portion 11 and the lower side butter material latching portion 12 respectively. Is extended from the middle to the side opposite to the mold through the gap between the upper horizontal butter material 21 and the lower horizontal butter material 22, so that the end of the chain 5 is inserted into the chain locking hole 14a. Even if the hook 51 is hooked and the chain 5 is tensioned, the chain trigger 1 itself does not rotate, and the working efficiency is improved.

  Even if the mounting angle of the chain 5 changes due to the fixing position of the support fitting 8 on the concrete slab 6 being moved closer to or away from the mold, the chain 5 is locked in the chain trigger 1 of the present embodiment. Since the intermediate side extending portion 13 is provided in the gap between the upper side butterfly material 21 and the lower side butterfly material 22, even if the chain 5 is pulled, the upper side butterfly material 21 or the lower side butterfly 22 The deformation of the intermediate side extending portion 13 is suppressed, and the reduction of the tension effect of the chain 5 can be suppressed.

  In the chain trigger 1 of the present embodiment, the upper horizontal butter material latching portion 11 is latched to the upper lateral butter material 21, and the lower lateral butter material latching portion 12 is latched to the lower lateral butter material 22. In this state, a tension force can be applied substantially in the middle of the chain trigger 1, that is, on the axis of the mold clamp 23, so that the mold clamp 23 as in the prior art described in Patent Document 1 above. The panel 4 itself can be caused by the tension force from the chain 5 without acting on the bending force, and the efficiency of the work of adjusting the verticality of the formwork is improved.

  Moreover, in this chain trigger 1, since the front end portion provided with the chain locking hole 14a in the intermediate side extending portion 13 is bent downward, the intermediate side extending portion 13 is connected to the intermediate side extending portion 13 via the chain 5. No bending force or the like acts on the. Therefore, it becomes possible to make the width | variety and cross-sectional area of the intermediate side extension part 13 small, the weight of the chain trigger 1 can be reduced, and workability | operativity can be improved.

  In the chain trigger 1 of the above-described embodiment, the protruding latching portion 11b is provided on the side of the upper horizontal butterfly material latching portion 11. However, the present invention is not limited to this, and the chain trigger shown in FIG. As shown in FIG. 1A, the projecting latching portions 11b and 12b may be provided on both the upper lateral butterfly material latching portion 11 and the lower lateral butterfly material latching portion 12. In this case, in consideration of inserting and rotating the chain trigger 1 into the gap between the horizontal buttering members 21 and 22 as described above, the intermediate side extending portions are formed by the protruding latching portions 11b and 12b. 13 becomes longer and the weight of the chain trigger 1 as a whole becomes heavier. However, it is still possible to obtain the effects of the present invention such as improvement of work efficiency other than weight and suppression of reduction of the tension effect of the chain 5. Absent. Further, although not shown, the protruding latching portion 11b may be provided only on the lower lateral flap material latching portion 12 side.

  Further, the chain trigger of the present invention extends in the horizontal direction without bending the chain locking portion 14 ′ provided at the distal end portion of the intermediate side extending portion 13 like the chain trigger 1 </ b> B shown in FIG. 6. Of course, a different shape is also acceptable.

  Further, when the horizontal flaps 21 ′ and 22 ′ are square pipes such as squares, the upper horizontal flaps 11 ′ and the lower horizontal flaps are latched as in the chain trigger 1C shown in FIG. In the portion 12 ′, a linear upper horizontal butter material abutting portion 11a corresponding to the cross-sectional shape of the horizontal butter materials 21 ′ and 22 ′ is brought into contact with the outer peripheral surfaces of the horizontal butter materials 21 ′ and 22 ′. 'And the lower side butterfly material contact portion 12a' are formed. Although the upper side surface 13a ′ and the lower side surface 13b ′ of the intermediate side extending portion 13 ′ in the chain trigger 1C are also formed linearly, the width and cross-sectional area of the intermediate side extending portion 13 ′ are still formed. Since it is smaller than other parts including the upper side butterfly material contact portion 11a ', the weight of the chain trigger 1C can be reduced and the effects of the present invention such as improved workability can be obtained. There is no change.

  Furthermore, in the description of the above embodiment, the chain trigger 1 is obtained by processing one metal plate to form the upper horizontal butter material hooking portion 11, the lower horizontal butter material hooking portion 12, and the intermediate side extending portion 13. However, the present invention is not limited to this, and may be configured by welding a plurality of metal plates instead of a single metal plate, or by bending a thick steel wire or the like. You may make it provide the upper side horizontal material latching part 11, the lower side horizontal material latching part 12, the intermediate side extension part 13, the chain latching | locking part 14, etc. FIG.

1, 1A, 1B, 1C Chain trigger 11, 11 'Upper side horizontal material latching part 11a, 11a' Upper side horizontal material contact part 11b, 12b Protruding latching part 12, 12 'Lower side horizontal material latching Portions 12a, 12a 'Lower side butter material contact portion 13, 13' Intermediate side extending portion 14, 14 'Chain locking portion 14a Chain locking hole

Claims (3)

A panel with vertical flaps provided at predetermined intervals on the back surface, and the upper and lower horizontal flaps are in contact with the vertical flaps in a horizontal state, and the mold clamps attached to the panel A chain trigger that is used to hook the chain against the formwork that has been clamped and secured by the horizontal flap material,
Upper horizontal butter material latching portion, upper horizontal butter material latching portion, lower lateral butter material latching portion, upper lateral butter material latching portion and lower side An intermediate side extending portion that extends from the middle of the horizontal buttering portion through the gap between the upper and lower horizontal butterfly material to the side opposite to the mold,
The upper horizontal butter material latching portion is provided with an upper horizontal butterfly material contact portion having a shape corresponding to the cross-sectional shape of the upper horizontal butterfly material, while the lower horizontal butterfly material latching portion has a lower side A lower side butterfly material abutting portion of the shape corresponding to the cross-sectional shape of the sideways material is provided, and a chain locking portion for locking the chain is provided at the tip of the intermediate side extending portion. The protruding latching portion that projects and latches to the upper or lower side of the upper or lower horizontal butterfly material at the end of at least one of the upper horizontal butterfly material latching portion and the lower horizontal butterfly material latching portion. A chain trigger characterized in that is provided. In the chain trigger according to claim 1,
The protruding latching portion is provided at least on the upper lateral flap material latching portion,
A chain trigger, wherein a chain locking portion provided at a distal end portion of the intermediate lateral extension portion is bent downward. In the chain trigger according to claim 1 or claim 2,
The intermediate side extending portion is a chain characterized in that at least a part of a cross section perpendicular to the shaft body direction is smaller than the upper horizontal butterfly material latching portion, the lower horizontal butterfly material latching portion, and the chain locking portion. Trigger.

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