Batten clamp

Abstract

To provide a batten clamp suited for field work using an electric tool.SOLUTION: This batten clamp comprises: a substrate; a rod screw inserted through the substrate; a first sandwiching part fixed to the substrate; a second sandwiching part in which a distance from the first sandwiching part is varied along with rotation of the rod screw; and a fastening member attached to one end side of the rod screw. The rod screw is rotatable with respect to the substrate, a coming-off prevention member with respect to the substrate is fixed to the other end side of the rod screw, and the second sandwiching part is provided with a nut part screwed to the rod screw and is varied in distance from the first sandwiching part along with rotation of the rod screw.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a batten clamp. [Background technology]

[0002] Formwork panels are used at construction sites for pouring concrete. The backside of each formwork panel is fitted with battens, which connect the battens of adjacent formwork panels together to form a seamless connection between the panels. Various clamps for connecting the battens of form panels have been proposed in the past. For example, in the connector disclosed in Patent Document 1 shown in Figure 1, a threaded culm 4 serving as a rod screw is inserted into a trough-shaped metal fitting body 2 serving as a long base. A clamping plate 1 serving as a first clamping part protrudes from one end of the metal fitting body 2, and a clamping plate 5 serving as a second clamping part is fixed to one end of the threaded culm 4. A nut 7 serving as a tightening member is screwed onto one end of the threaded culm 4. By rotating this nut 7, the nut 7 moves the threaded culm 4 relatively in its axial direction, thereby adjusting the distance between the clamping plate 1 and the clamping plate 5. That is, by tightening the nut 7, the pair of crosspieces interposed between the pressure plates 1 and 5 can be tightened, and the two can be clamped together. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 57-168646 Summary of the Invention [Problem to be solved by the invention]

[0004] In the clamp of FIG. 1, when the nut 7 is tightened, one end of the threaded rod inevitably protrudes from the metal fitting body 2, which is the base, and the length of this protrusion changes. The nut 7 is generally tightened on-site using a power tool (impact wrench). At this time, if the threaded rod protrudes and the protruding length changes, a power tool that can accommodate the protruding length must be prepared. In other words, general-purpose power tools cannot be used, which may cause problems in on-site work. [Means for solving the problem]

[0005] As a result of extensive research aimed at solving the above problems, the present inventors have arrived at the following invention. That is, a first aspect of the present invention is defined as follows. A batten clamp comprising a base, a rod screw inserted through the base, a first clamping part fixed to the base, a second clamping part whose distance from the first clamping part varies with the rotation of the rod screw, and a tightening member attached to one end of the rod screw, The rod screw is rotatable relative to the base body, and a retaining member for preventing the rod screw from coming off the base body is fixed to the other end of the rod screw, The second clamping portion has a nut portion that screws onto the bar screw, and the distance between the second clamping portion and the first clamping portion changes as the bar screw rotates.

[0006] According to the batten clamp defined in the first aspect as defined above, the nut portion of the second clamping portion is threaded onto the rod screw and moves relatively in the axial direction of the rod screw as the rod screw rotates, so that the length of the rod screw protruding from the base does not change even when the rod screw is rotated. In other words, if a fastening member such as a nut is fixed to the tip of the rod screw, the crosspiece can be fastened using a general-purpose impact wrench.

[0007] The second aspect of the present invention is defined as follows: In the batten clamp defined in the first aspect, the bar screw has a portion protruding from the base, the clamping member is fixed to the protruding portion, and a predetermined gap is provided between the clamping member and the base; The rod screw is movable in the axial direction of the rod screw relative to the base body. According to the batten clamp defined in the second aspect, a predetermined gap is provided between the clamping member and the base, and the rod screw is movable in its axial direction relative to the base, so that the distance between the second clamping part and the first clamping part can be adjusted by the distance of the gap without rotating the rod screw. In other words, prior to performing the impact clamping operation, the second clamping part can be brought closer to the first clamping part, improving the efficiency of the clamping operation.

[0008] The third aspect of the present invention is defined as follows: In the batten clamp defined in the first or second aspect, the base body includes a long plate portion and retainer portions protruding in a first direction from both ends of the long plate portion, The rod screw is rotatably inserted into the retainer portion, A long groove is formed in the long plate portion along the rod screw, the first clamping portion protrudes from the long plate portion in a second direction opposite to the first direction, The second clamping portion, which is threaded onto the bar screw, passes through the long groove of the long plate portion and protrudes in the second direction. According to the third aspect of the batten clamp defined in this way, a long plate portion is interposed between the first and second clamping portions that clamp the batten and the bar screw, and a long groove is formed in the long plate portion. Therefore, a worker who is rotating the bar screw with a power tool can visually check the clamping state of the batten by the first and second clamping portions through the long groove.

[0009] A fourth aspect of the present invention is defined as follows: In the crosspiece clamp defined in the third aspect, a reinforcing wall portion protrudes in the first direction from the longitudinal edge of the long plate portion, and the protruding height of the reinforcing wall portion is lower than that of the retainer. According to the crosspiece clamp of the fourth aspect defined as above, the reinforcing wall portion of the long plate portion is lower than the retainer portion, so that visibility of the first and second clamping portions through the long groove is ensured. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a plan view showing a conventional clip. [Figure 2] FIG. 2 is a perspective view showing a clamp 20 according to an embodiment of the present invention. [Figure 3] Figure 3 is an exploded view of the same. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 2 and 3, the clamp 20 of this embodiment includes a base body 30, a rod screw 40, first and second clamping portions 51, 52, and a nut 60. The base body 30 is made of steel plate, and a first retainer portion 32 and a second retainer portion 33 protrude downward in Figure 2 from both ends of a long plate portion 31. Reinforcing wall portions 37 similarly protrude downward in the figure from both longitudinal sides of the long plate portion 31. A long groove 35 is formed in the long plate portion 31 in the longitudinal axis direction. As shown in the figure, the second clamping portion 52 is inserted into the long groove 35 and is movable along the long groove 35 in the axial direction of the rod screw 40, and the protrusion amount of the reinforcing wall portion 37 is shorter than that of the retainer portions 31 and 32. This allows the worker to observe the movement of the second clamping portion 52 from a wide angle when fastening the clamp 20. Therefore, the state of clamping of the crosspiece by the first clamping portion 51 and the second clamping portion 52 can be visually confirmed.

[0012] As shown in Figure 3, the first retainer part 32 has a screw through hole 34. Similarly, the second retainer part 33 also has a screw through hole (not shown). The bar screw 40 is inserted into these screw through holes in a loose fit state. This allows the bar screw 40 to rotate and move axially relative to the base body 30. A stopper (preventive member) 44 is fixed to the other end (the left end in the figure) of the bar screw 40, and a nut (fastening member) 60 is fixed to one end of the bar screw 40, thereby preventing the bar screw 40 from coming off the base body 30.

[0013] The base end of the first clamping part 51 is welded to the other end (the left end in the figure) of the long plate part 31 of the base body 30, and protrudes upward in the figure (Fig. 3). A nut part 54 is attached to the base end of the second clamping part 52, and this nut part 54 is threadedly engaged with the pin screw 40. As the pin screw 40 rotates, the nut part 54 moves in the axial direction of the pin screw 40. Thus, the distance between the second clamping part 52 and the first clamping part 53 is adjusted. The second clamping portion 52 is inserted into the long groove 35 of the long plate portion 31 . Any structure can be selected for the first clamping unit 51 and the second clamping unit 52 as long as they can clamp the crosspieces. In this example, a bent steel plate is used to reduce weight, but they can also be made of rod-shaped or column-shaped members.

[0014] 2, the bar screw 40 is formed to be longer than the base body 30. There is a margin of distance L between the fastening member (nut) 60 and the first retainer part 32. As described above, the bar screw 40 is in a loose fit with respect to each of the retainer portions 32, 33 and is movable in its axial direction. Therefore, prior to clipping the crosspiece between the first clamping portion 51 and the second clamping portion 52, the clamping member 60 can be pushed in the axial direction of the bar screw 40, thereby bringing the second clamping portion 52 closer to the first clamping portion 51. This makes it possible to reduce the total amount of rotation of the clamping member 60 required to clip the crosspiece.

[0015] The clamp 20 of this embodiment configured as above is used as follows. First, the clamping member 60 is manually rotated counterclockwise to provide a sufficient gap between the first clamping portion 51 and the second clamping portion 52 to clamp the crosspiece. The crosspiece is set so that it is sandwiched between the first clamping portion 51 and the second clamping portion 52. Then, the clamping member 60 is pushed in to narrow the distance between the clamping portions 51 and 52 and the crosspiece. At this time, the operator can visually check the relative positions of the crosspiece and the clamping portions 51 and 52 through the long groove 35 formed in the long plate portion 31. Furthermore, by rotating the clamping member 60 clockwise, the second clamping portion 52 approaches the first clamping portion 51, thereby making it possible to visually check the clamping state of the clamping portions 51 and 53 on the crosspiece.

[0016] In the clamp 20 of this embodiment, the clamping member 60 is fixed to one end of the rod screw 40, and even when it is rotated, the clamping member 60 is always fixed to one end of the rod screw 40, and the rod screw does not protrude from this. Therefore, the clamping member 60 can always be rotated with a general-purpose power tool. In the example of FIG. 2, a nut is used as the fastening member 60, which allows the use of a general-purpose impact wrench. If a screw head structure is adopted as the fastening member 60, a general-purpose impact wrench can also be used.

[0017] The present invention is not limited to the above-described embodiments shown in the drawings, but can be modified appropriately within the scope of the present invention. [Explanation of symbols]

[0018] 20 Clamp 30 Base 31 Long board section 32, 33 Retainer part 35 Nagamichi 37 Reinforced wall 40 Rod Screw 44 Stopper (prevention member) 51 1st clamping part 52 Second clamping part 54 Nut part

Claims

1. A batten clamp comprising: a base body; a rod screw that passes through the base body; a first clamping part that is fixed to the base body; a second clamping part that changes its distance from the first clamping part as the rod screw rotates; and a tightening member that is attached to one end of the rod screw; The rod screw is rotatable relative to the base body, and a retaining member for preventing the rod screw from coming off the base body is fixed to the other end of the rod screw, The second clamping portion has a nut portion that screws onto the bar screw, and the distance between the second clamping portion and the first clamping portion changes as the bar screw rotates.

2. the bar screw has a portion protruding from the base body, the fastening member is fixed to the protruding portion, and a predetermined gap is provided between the fastening member and the base body; 2. The batten clamp according to claim 1, wherein said bar screw is movable in an axial direction of said bar screw relative to said base body.

3. the base body includes a long plate portion and retainer portions protruding in a first direction from both ends of the long plate portion, The rod screw is rotatably inserted into the retainer portion, A long groove is formed in the long plate portion along the rod screw, the first clamping portion protrudes from the long plate portion in a second direction opposite to the first direction, The second clamping portion threaded onto the rod screw is inserted into the long groove of the long plate portion and protrudes in the second direction. The batten clamp according to claim 1 or 2.

4. 4. The batten clamp according to claim 3, wherein a reinforcing wall portion projects in the first direction from a longitudinal edge of the long plate portion, the reinforcing wall portion projecting to a smaller extent than the retainer portion.

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