Connection structure between concrete formwork and support members
The formwork clamp structure addresses the operational challenges of the conventional design by allowing the wedge plate to be driven outside the formwork, ensuring easy and efficient attachment to concrete bracing materials, facilitating quicker assembly.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- KUNIMOTO SHOKAI KK
- Filing Date
- 2023-06-26
- Publication Date
- 2026-07-02
AI Technical Summary
The conventional formwork clamp design for concrete structures is hindered by the difficulty in operating the wedge plate due to space restrictions, particularly near the upper end of the formwork, where the side plate obstructs the driving of the wedge plate hammer.
A formwork clamp structure that allows the wedge plate to be driven into a wedge hole of a rod-shaped body protruding outside the receiving member, with a clamping member that rotates perpendicularly to the horizontal battens, enabling easy operation and fixation of the battens without lengthening the support member.
Facilitates easy and reliable attachment of the formwork clamp to the bracing material, allowing efficient and quick assembly of concrete formworks by eliminating space restrictions and enabling smaller, lighter clamp designs.
Smart Images
Figure 0007883769000001 
Figure 0007883769000002 
Figure 0007883769000003
Abstract
Description
Technical Field
[0001] The present invention relates to a connection structure between a concrete formwork and a support member that can be used as a means for connecting the upper end of a support member whose lower end is fixed in position on the road surface side to a horizontal flange of the concrete formwork in order to hold the concrete formwork, which is free at the upper end without being connected to other structures, in a predetermined posture, such as a concrete formwork when building a guardrail on the side of an elevated road.
Background Art
[0002] For example, on the side of the road surface of an elevated road, a concrete wall called a guardrail that stands up from the road surface is constructed. The formwork for constructing this concrete wall is constructed by inner and outer formworks that are connected to each other by a separator to form a concrete pouring space. However, since the upper end of this formwork is free without being connected to other structures, in order to hold the concrete formwork in a predetermined posture, for example, an inclined support member is interposed between a horizontal flange near the upper end of the inner formwork and the road surface. As also shown in Patent Document 1, a formwork clamp for connecting the support member to a horizontal flange near the upper end of the concrete formwork is attached to the upper end of the support member. This formwork clamp includes a wedge plate that sandwiches the horizontal flange between a receiving member pivotally supported at the upper end of the support member.
Prior Art Documents
Patent Documents
[0003]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0004] In the conventional configuration described in Patent Document 1 above, the wedge plate of the formwork clamp must be driven downward into the wedge hole of a rod-shaped body that is provided to protrude from the receiving member to the inside of the horizontal batten. That is, since the horizontal batten of the concrete formwork abuts against the outer edge of the side plate attached around the formwork plate, a space is secured between the horizontal batten and the formwork plate on the inside. The wedge plate driving work is carried out on the inside of the horizontal batten using this space, and especially near the upper side of the formwork, the formwork side plate located above the horizontal batten gets in the way, making it difficult to operate the wedge plate driving hammer. [Means for solving the problem]
[0005] The present invention proposes a connecting structure between a concrete formwork and a support member that can solve the above-mentioned problems of the conventional method. To facilitate understanding of the relationship with the embodiments described later, the connecting structure according to the present invention is shown with reference numerals in parentheses as used in the description of the embodiments, and is a support structure in which a concrete formwork (1) is supported by an inclined support member (9), wherein a formwork clamp (8) is attached to the upper end of the support member (9), and is detachably attached to two horizontal bracing members (4b) arranged in parallel vertically on the formwork (1), and is a connecting structure between a concrete formwork and a support member. andThe formwork clamp (8) comprises a vertically oriented receiving member (16) whose lower end is pivotally supported at the upper end of the support member (9) so as to be able to swing around a horizontal support shaft (15), a clamping member (17) that sandwiches the two horizontal battens (4b) between the receiving member (16), and a wedge plate (18). The clamping member (17) has a rod-shaped body (19) that passes through the receiving member (16) via the space between the two horizontal battens (4b), and the clamping member (17) rotates perpendicularly to the two horizontal battens (4b) with the rod-shaped body (19) as its axis of rotation. The clamping member (17) is configured to be switchable between an operating position parallel to the vertical length of the receiving member (16) and an extending / retracting position parallel to the two horizontal battens (4b). The rod-shaped body (19) is provided with a wedge hole (21) into which the wedge plate (18) is inserted downward on the outside of the receiving member (16). When the clamping member (17) is in the operating position, inserting the wedge plate (18) downward into the wedge hole (21) clamps and fixes the two horizontal battens (4b) between the receiving member (16) and the clamping member (17). In the connection structure between the concrete formwork and the support member, either configuration 1 or configuration 2 described below is incorporated. Configuration 1 The direction in which the wedge hole (21) provided in the rod-shaped body (19) penetrates is oblique to the vertical length direction of the receiving member (16) when it is in the working position, as viewed from the tip side of the rod-shaped body (19), and the tip of the wedge plate (18) driven downward into the wedge hole (21) is positioned laterally offset from the position directly above the connection between the lower end of the clamping member (17) and the support member (9). Configuration 2 The rod-shaped body (19) is configured with a rectangular cross-section, with wider sides on both sides where the wedge hole (21) opens. The through hole (23) through which the rod-shaped body (19) passes, provided in the receiving member (16), is shaped to have protrusions (23a, 23b) on both sides in the diametrical direction so that the clamping member (17) can rotate only within a 90-degree range between the operating position and the insertion / removal position. . [Effects of the Invention]
[0006] The above invention Basic version omitting configurations 1 and 2According to the configuration, with the formwork clamp positioned outside the batten material to be clamped, the rod-shaped body protruding from the outside of the receiving member is rotated to switch the clamping member to an in-and-out position parallel to the batten material to be clamped. In this state, the formwork clamp is moved to the side with the batten material to be clamped, and the clamping member in the in-and-out position is passed between the two batten materials, upper and lower, and the clamping member enters the rear side of the batten material to be clamped. Next, the rod-shaped body is rotated 90 degrees to switch the clamping member from the in-and-out position to the working position, so that the two batten materials are clamped between the receiving member on the outside of the batten material and the clamping member on the inside of the batten material. After this, by pressing the wedge plate downward into the wedge hole of the rod-shaped body on the outside of the receiving member, the clamping member is moved outward via the rod-shaped body, and the receiving member is moved inward relative to it, so that the two batten materials can be clamped and fixed between them. Once the formwork clamps are connected to the two horizontal bracing members at the desired height of the concrete formwork in this manner, the lower end of the support member connected to (or connected at this point) the lower end of the outer receiving member can be fixed to a predetermined position on the floor side, thereby interposing the support member between the floor and the concrete formwork at a predetermined angle, and fixing the concrete formwork in the predetermined position. Of course, it is also possible to connect the upper formwork clamps to the two horizontal bracing members at the desired height of the concrete formwork as described above, while the lower end of the support member is locked to a predetermined position on the floor side.
[0007] The connecting structure between the concrete formwork and the support member of the present invention, when used as described above, allows the upper end of the support member to be connected to a horizontal bracing member at the desired height of the concrete formwork. However, compared to conventionally known configurations such as those described in Patent Document 1, the wedge plate is driven into a wedge hole in a rod-shaped body that protrudes outward from the receiving member that clamps the bracing member from the outside, and is a location that completely protrudes to the outside of the concrete formwork, with nothing restricting the working space for driving the wedge plate from above. Therefore, the wedge plate driving work can be performed easily and reliably.
[0008] Furthermore, according to the present invention, which includes the above configuration 1,In cases where the wedge plate is driven in from above in a downward direction, it is no longer necessary to make the length of the support member longer so that the connection between the lower end of the support member and the shoring member does not interfere with the tip (lower end) of the wedge plate, allowing the formwork clamp to be made smaller and lighter.
[0009] also, The present invention comprising the above configuration 2 According to the specifications, the clamping member can only be rotated within a 90-degree range between the vertical operating position and the horizontal retraction position relative to the receiving member, which is oriented vertically during use. Therefore, compared to a clamping member that can rotate freely without restriction, the operation of switching the clamping member between the vertical operating position and the horizontal retraction position can be performed easily and reliably. Consequently, the formwork clamp can be easily and quickly attached to the bracing material on the concrete formwork side, allowing for efficient work.
[0010] Of course, it is possible to use a combination of both Configuration 1 and Configuration 2 above, as well as a combination of the following Configuration 3. Configuration 3 The clamping member (17) is formed from a thick plate, and the rod-shaped body (19) is formed from a round bar (20) that is welded to the clamping member (17). The region of this round bar (20) from the round bar-shaped base (20a) welded to the clamping member (17) to the tip is formed into a rectangular cross-section with wider sides on both sides where the wedge hole (21) opens. A separate member, such as a pin-shaped member (22) with a length that protrudes outward from both sides from the outer circumferential surface position of the round bar-shaped base, is attached to the end of the main body region (20b) of this rectangular cross-section on the side of the round bar-shaped base (20a) to prevent the round bar-shaped end (20a) from entering the through hole (23) through which the rod-shaped body (19) is provided in the receiving member (16). configuration . Configuration 3 is incorporated into this configurationAccording to this, even when the inner clamping member is closest to the outer receiving member in a situation where a formwork clamp is not used, even when the rectangular cross-sectional area of the rod-shaped body is located within the rod-shaped body through-hole of the receiving member and the rotation range is limited within a range of 90 degrees, even if the length of the rectangular cross-sectional area is not increased, the narrow round rod-shaped end between the rectangular cross-sectional area and the inner clamping member enters into the through-hole and does not interfere with the protrusion provided in the through-hole, and there is no risk that the rod-shaped body will be in a freely rotatable state together with the clamping member. Therefore, the length of the rectangular cross-sectional area of the rod-shaped body can be minimized as much as possible to reduce costs.
Brief Description of Drawings
[0011] [Figure 1] Figure 1 is a side view showing an example of a guardrail formwork structure to which the present invention is applied. [Figure 2] Figure 2A is a front view of the formwork clamp of the present invention in a use state, and Figure 2B is an enlarged view of part X in Figure 2A. [Figure 3] Figure 3 is a side view of the same in a use state. [Figure 4] Figure 4 is a side view of a clamping member provided with a rod-shaped body of the formwork clamp of the present invention. [Figure 5] Figure 5 is an enlarged longitudinal front view of the main part of the clamping member shown in Figure 4. [Figure 6] Figure 6A is a longitudinal side view of a receiving member used in the formwork clamp, and Figure 6B is a rear view of the same receiving member. [Figure 7] Figure 7A is a front view showing the first stage when the formwork clamp is used, and Figure 7B is an enlarged view of part Y in Figure 7A. [Figure 8] Figure 8 is a side view showing the second stage of the same. [Figure 9] Figure 9 is a side view showing the third stage of the same. [Figure 10] Figure 10A is a side view of the formwork clamp according to another embodiment of the present invention when use is completed, and Figure 10B is a front view of the main part of Figure 10A.
Embodiments for Carrying Out the Invention
[0012] Hereinafter, a preferred embodiment of the present invention will be described based on the accompanying drawings. In FIG. 1, reference numeral 1 denotes a concrete form for constructing a guardrail wall on the side of a road, which is composed of an outer form 2 and an inner form 3. This concrete form 1 is a well-known conventional one. The outer form 2 and the inner form 3 include formwork plates 2a and 3a, side frames 2b and 3b attached to the periphery outside the formwork plates 2a and 3a, two upper and lower horizontal braces 4a and 4b abutting on the outside of the side frames 2b and 3b, a separator 5 for keeping the distance between both formwork plates 2a and 3a constant, and brace clamps 6a and 6b connected to both ends of the separator 5 for fixing and integrating the two upper and lower horizontal braces 4a and 4b to the forms 2 and 3. In the illustrated concrete form 1, round steel pipes are used for the two upper and lower horizontal braces 4a and 4b, but square steel pipes may also be used. Of course, the coupling means 7 between both side forms composed of the two upper and lower horizontal braces 4a and 4b, the separator 5, and the brace clamps 6a and 6b are provided in a plurality of upper and lower stages according to the height of the concrete form 1.
[0013] In the embodiment shown in Figure 1, the formwork clamp 8 according to the present invention is connected to two horizontal bracing members 4b on the inner formwork 3 side of the uppermost inter-formwork coupling means 7. The lower end of the support member 9, to which the formwork clamp 8 is supported at the upper end, is connected by a horizontal support shaft 11 to a support member 10 fixed on the road surface at a suitable distance from the inner formwork 3. The support member 9 is inclined at a predetermined angle so that the lower end is further away from the inner formwork 3, thereby suppressing inward and outward tilting of the inner formwork 3 and ultimately holding the entire concrete formwork 1 in a predetermined position. Of course, the formwork clamp 8 and the support member 9 are arranged at appropriate intervals along the horizontal length of the concrete formwork 1. Furthermore, the support member 9 comprises a retractable double tube 12 whose overall length can be adjusted in multiple stages by a connecting pin 12a, a screw shaft 13 that can be extended and retracted by forward and reverse rotation and is screwed into the screw hole at the tip of the upper tube 12b of the double tube 12, and an open-topped U-shaped connecting fitting 14 connected to the upper end of the screw shaft 13, and the formwork clamp 8 is pivotally connected to the upper end of the support member 9 via the U-shaped connecting fitting 14 so as to be able to swing around a horizontal support shaft 15 that is parallel to the length direction of the horizontal batten member 4b.
[0014] The detailed structure of the formwork clamp 8 according to the present invention will now be described. As shown in Figures 2 and 3, the formwork clamp 8 includes an up-and-down receiving member 16 whose lower end is pivotally supported around a horizontal support shaft 15 on a U-shaped connecting fitting 14 at the upper end of a support member 9, a clamping member 17 that sandwiches the two horizontal battens 4b between itself and the receiving member 16, and a wedge plate 18. The receiving member 16 and the clamping member 17 are provided with batten fitting recesses 16a and 17a on their opposing sides, into which the two upper and lower horizontal battens 4b are fitted. A rod-shaped body 19 is connected to the clamping member 17 from between the two upper and lower batten fitting recesses 17a.
[0015] As shown in Figures 4 and 5, the rod-shaped body 19 is composed of a thick plate-shaped rod portion 17b integrally connected to a clamping member 17 cut out from a thick plate, and a round bar material 20 to which a round bar-shaped base portion 20a is welded to the tip of the thick plate-shaped rod portion 17b. The main body region 20b of the round bar material 20, from the round bar-shaped base portion 20a to the tip, is press-formed into a rectangular cross-section flat bar shape with a wedge hole 21 that penetrates in the thickness direction. As shown in Figure 2, when viewing the clamping member 17 from the tip side of the rod-shaped body 19, the clamping member 17 is oriented vertically, and the longer side of the rectangular cross-section of the body region 20b (the width direction of the wide side surface where the wedge hole 21 opens) is inclined at a 45-degree angle. This is because, during butt welding of the round bar material 20 (round bar base 20a) to the thick plate-shaped rod-shaped portion 17b of the clamping member 17, the phases of the two are shifted by 45 degrees. A pin-shaped member 22, longer than the diameter of the round bar base 20a, is welded to one side of the end of the body region 20b on the round bar base 20a side, with both ends protruding from both sides of the wide side surface of the body region 20b.
[0016] As shown in Figure 6, the receiving member 16 is made by press-forming a plate material into a U-shape in cross-section, and a through hole 23 is provided in its bottom plate portion 16b through which the rod-shaped main body 19 passes. Two upper and lower batten fitting recesses 16a are formed on the side edges of the left and right side plate portions 16c, which are bent and connected from both sides of the bottom plate portion 16b on the side with the clamping member 17. Bearing portions 16d are formed on the left and right side plate portions 16c that extend downward from the bottom plate portion 16b, and as shown in Figure 2, both of these bearing portions 16d are fitted inside the U-shaped connecting fitting 14 attached to the upper end of the support member 9, and are pivotally connected to the U-shaped connecting fitting 14 by the horizontal support shaft 15. Furthermore, the U-shaped connecting fitting 14 is rotatably attached to the upper end cylindrical shaft portion 13a of the screw shaft portion 13 of the support member 9, and a handle bar 24 for rotating the screw shaft portion 13 is movably mounted in a diametrically-oriented through hole provided in the upper end cylindrical shaft portion 13a on the lower side of the U-shaped connecting fitting 14.
[0017] As shown in Figures 2, 6B, and 7, the through-hole 23 through which the rod-shaped body 19 passes in the bottom plate portion 16b of the receiving member 16 is not a circular hole with a diameter larger than the width of the flat bar-shaped body region 20b of the rod-shaped body 19, but rather has a circular hole with a diameter larger than the width of the body region 20b, and projections 23a and 23b are provided on both sides in the diametrical direction of the through-hole 23 that protrude inward toward the center of the through-hole 23. As explained earlier, the clamping member 17 and the rod-shaped body 19 are configured such that when the clamping member 17 is in a vertical orientation, the direction in which the wedge plate is driven into the wedge hole 21 of the body region 20b is inclined 45 degrees to one side. In this case, as shown in Figure 2, the side portion located on the upper side of the body region 20b, which is inclined 45 degrees, comes into contact with the upper side of the projection 23b on one side, and the side portion located on the lower side of the body region 20b comes into contact with the lower side of the projection 23a on the opposite side. As a result, the wedge plate 18, which is inserted downward into the wedge hole 21 of the body region 20b, is stopped in a state inclined 45 degrees to one side from the vertical orientation.
[0018] The wedge plate 18 has a tip portion 18a that tapers even more sharply from the end where the width of the area where the wedge action is actually performed (the area where the width gradually increases) is smallest, and a retaining pin 25 is attached to the tip of this tip portion 18a to prevent the wedge plate 18 from falling out of the wedge hole 21 of the rod-shaped body 19. As a result, there is no risk of the clamping member 17 falling out of the receiving member 16 together with the rod-shaped body 19, and when the retaining pin 25 pulls the wedge plate 18 out to a position adjacent to the wedge hole 21, the width of the wedge plate 18 located inside the wedge hole 21 is greatly reduced, and the range of movement of the rod-shaped body 19 and the clamping member 17 relative to the receiving member 16 is greatly expanded.
[0019] An example of how to use the formwork clamp 8 configured as described above is explained in Figure 1. The formwork clamp 8 is moved to the outside of the two upper and lower horizontal bracing members 4b that form the inner formwork 3 of the concrete formwork 1, where the formwork clamp 8 is attached. At this time, the receiving member 16 of the formwork clamp 8 may be attached to the upper end of the support member 9, or the support member 9 and the receiving member 16 may be connected after the formwork clamp 8 has been attached to the horizontal bracing members 4b. The clamping member 17 of the formwork clamp 8, together with the rod-shaped body 19 as shown in Figures 7 and 8, is rotated 90 degrees from its upright working position to a rotatable position to change it to an in-and-out position. At this time, as shown in the figures, the wedge plate 18 rotates due to gravity so that the wide end side closer to the center of gravity moves diagonally downward, but there is no risk of the wedge plate 18 falling out of the wedge hole 21 of the rod-shaped body 19 due to the retaining pin 25. Of course, the clamping member 17, which has been switched to a horizontal extension / retraction position, is held in that position by gravity acting on the wedge plate 18 and by the projections 23a and 23b of the through hole 23 preventing the rod-shaped body 19 from rotating any further.
[0020] Next, as shown in Figure 8, the clamping member 17, which is in a horizontal extension / retraction position, is inserted horizontally from the outside between the two upper and lower horizontal battens 4b to be clamped. In this state, the wedge plate 18, which was hanging down at its wide end, is rotated upward to lift it, and the clamping member 17 together with the rod-shaped body 19 is rotated 90 degrees upward to the working position, or the clamping member 17 is rotated directly at the working position 90 degrees upward, so that, as shown in Figure 9, the clamping member 17 is positioned between the upright, vertically oriented receiving member 16 and the two upper and lower horizontal battens 4b. In this state, the wedge plate 18, which is in a diagonally downward position, is driven into the wedge hole 21 of the rod-shaped body 19 by striking its upper wide end, thereby forcing the receiving member 16 and the clamping member 17 to move closer to each other, and the two upper and lower horizontal battens 4b can be strongly clamped and fixed between the two members 16 and 17. As a result, the formwork clamp 8 is clamped and fixed to the two upper and lower horizontal battens 4b that are to be clamped, as shown in Figures 2 and 3. The support member 9, which has the formwork clamp 8 at its upper end, is connected at its lower end to the support member 10 on the road surface via a horizontal support shaft 11. The work is then completed by adjusting the total length of the support member 9 by rotating the screw shaft portion 13 so that the inner formwork 3 is finally in a predetermined upright position.
[0021] Furthermore, in the formwork clamp 8 with the above configuration, as shown in Figure 2, when the wedge plate 18 is driven in to clamp and fasten the two upper and lower horizontal bracing members 4b between the receiving member 16 and the clamping member 17 in the working position, the wedge plate 18 will be pressed against the receiving member 16 at an angle of 45 degrees relative to the receiving member 16. As a result, the narrowed tip of the wedge plate 18 will move laterally away from the means that connects the lower end of the receiving member 16 and the upper end of the support member 9, that is, the connecting means consisting of the U-shaped connecting fitting 14 and the horizontal support shaft 15, so that the two do not interfere with each other. However, as shown in Figure 10, if the length of the receiving member 16 can be extended downwards to increase its length and the position of the connecting means with the support member 9 can be lowered, then it is not necessary to provide a 45-degree phase difference between the flat bar-shaped body region 20b of the rod-shaped body 19 in which the wedge hole 21 is provided and the clamping member 17, and it is possible to configure the wedge plate 18 to be driven in straight downward parallel to the length direction of the receiving member 16. In this case as well, it is desirable to incorporate the projections 23a and 23b used in the above embodiment into the through hole 23 through which the rod-shaped body 19 provided in the receiving member 16 passes, so that the clamping member 17 and the rod-shaped body 19 can rotate in both forward and reverse directions only within a 90-degree range. [Industrial applicability]
[0022] The concrete formwork and support member connection structure according to the present invention can be used, for example, as a means of connecting the upper end of a support member, whose lower end is fixed to the road surface side, to a horizontal bracing member of the concrete formwork in order to hold in a predetermined position a concrete formwork whose upper end is free and not connected to other structures, such as when constructing a parapet wall on the side of an elevated road. [Explanation of Symbols]
[0023] 1. Concrete formwork 2 External formwork 2a,3a Formwork board 2b,3b side frame 3. Inner formwork 4a, 4b Two horizontal bracing members, top and bottom. 5 Separators 6a, 6b Wedge clamp 7. Means for connecting formwork on both sides 8 Formwork Clamps 9 Support members 10 Support member 11 Horizontal support shaft 12. Extendable double-tube body 12a Connecting pin 12b Upper section of the tube 13 Spiral part 13a Upper end cylindrical shaft 14 U-shaped connecting fittings 15 Horizontal support shaft 16 Receiving member 16a, 17a Fitting recess for batten material 16b Bottom plate part 16c Left and right side panels 16d Bearing section 17 Clamping member 17b Thick plate-like rod-shaped part 18 Wedge plate 19 Rod-shaped body 20 round bar stock 20a Round bar-shaped base 20b Flat bar-shaped main body area 21 Wedge holes 22 Pin-shaped member 23 Through hole 23a,23b Protrusion 24 Handlebar for rotating the screw shaft 25 Retaining pins
Claims
1. A support structure for supporting concrete formwork with diagonal support members, wherein a formwork clamp is attached to the upper end of the support member, which is detachably attached to two horizontal bracing members arranged in parallel vertically on the formwork, and is a connecting structure between concrete formwork and support members, The formwork clamp comprises a vertically oriented receiving member whose lower end is pivotally supported at the upper end of the support member so as to be able to swing around a horizontal support axis, a clamping member that sandwiches the two horizontal battens between the receiving member and the clamping member, and a wedge plate, wherein a rod-shaped body is attached to the clamping member, passing through the receiving member via the space between the two horizontal battens, and the clamping member is configured to be switchable between an operating position in which it is perpendicular to the two horizontal battens and parallel to the vertical length direction of the receiving member, and an in-and-out position in which it is parallel to the two horizontal battens, with the rod-shaped body as the axis of rotation, and the rod-shaped body is provided with a wedge hole on the outside of the receiving member into which the wedge plate is inserted downward, and when the clamping member is in the operating position, the two horizontal battens are sandwiched and fixed between the receiving member and the clamping member by inserting the wedge plate downward into the wedge hole, in a connecting structure between concrete formwork and a support member, A connection structure between a concrete formwork and a support member, wherein the direction of penetration of the wedge hole provided in the rod-shaped body is inclined obliquely with respect to the vertical length direction of the receiving member when it is in the working position, as viewed from the tip side of the rod-shaped body, and the tip of the wedge plate driven downward into the wedge hole is positioned laterally offset from the position directly above the connection between the lower end of the clamping member and the support member.
2. A support structure for supporting concrete formwork with an inclined support member, wherein a formwork clamp is attached to the upper end of the support member, which is detachably attached to two horizontal bracing members arranged in parallel vertically on the formwork, and the structure connects concrete formwork and a support member. The formwork clamp comprises a vertically oriented receiving member whose lower end is pivotally supported at the upper end of the support member so as to be able to swing around a horizontal support axis, a clamping member that sandwiches the two horizontal battens between the receiving member and the clamping member, and a wedge plate, wherein a rod-shaped body is attached to the clamping member, passing through the receiving member via the space between the two horizontal battens, and the clamping member is configured to be switchable between an operating position in which it is perpendicular to the two horizontal battens and parallel to the vertical length direction of the receiving member, and an in-and-out position in which it is parallel to the two horizontal battens, with the rod-shaped body as the axis of rotation, and the rod-shaped body is provided with a wedge hole on the outside of the receiving member into which the wedge plate is inserted downward, and when the clamping member is in the operating position, the two horizontal battens are sandwiched and fixed between the receiving member and the clamping member by inserting the wedge plate downward into the wedge hole, in a connecting structure between concrete formwork and a support member, The rod-shaped body has a rectangular cross-section with wider sides on which the wedge holes are opened, and the through-hole provided in the receiving member through which the rod-shaped body passes has a shape with projections on both sides in the diametrical direction so that the clamping member can rotate only within a 90-degree range between the working position and the insertion / removal position, in a connecting structure between a concrete formwork and a support member.
3. The rod-shaped body has a rectangular cross-section with wider sides on both sides where the wedge hole opens, and the through hole through which the rod-shaped body passes, provided in the receiving member, is shaped to have projections on both sides in the diametrical direction so that the clamping member can rotate only within a 90-degree range between the working position and the insertion / removal position, the connecting structure between a concrete formwork and a support member according to claim 1.
4. The connecting structure between a concrete formwork and a support member according to claim 2 or 3, wherein the clamping member is formed from a thick plate, the rod-shaped body is formed from a round bar, the rod-shaped body is formed into a rectangular cross-section in the region from the round bar-shaped base welded to the clamping member to the tip, with the sides on both sides where the wedge hole opens being wider, and a member is attached to the end of the rectangular cross-section body region on the side of the round bar-shaped base to prevent the round bar-shaped base from entering the through hole through which the rod-shaped body passes.