Lateral movement mechanism for clamping device of concrete formwork

Abstract

To provide a concrete formwork movement clamp mechanism which can reduce a labor load of a worker to secure a long movement distance with as little force as possible.SOLUTION: A concrete formwork clamp mechanism 1 comprises a base link 2, an intermediate link 3, and a swing link 4. The intermediate link 3 is pivoted between the base link 2 whose base end is pivoted on a formwork and the swing link 4 whose tip is locked to a movable member rotatably with each other. A pivot part to the formwork of the base link 2 and a pivot part between the base link 2 and the intermediate link 3 are made rotatable as clamp shafts 21, 31, respectively. The intermediate link 3 is provided with two engagement parts 32A, 32B on a concentric circle of the intermediate link shaft 31, and a locking part 22 to engage is provided on a straight line between the base link shaft 21 of the base link 2 and the intermediate link shaft 31. Before and after the rotation of the base link 2 and the intermediate link 3, either the engagement part 32A or the engagement part 32B of the intermediate link 3 is made to engage with the locking part 22 of the base link 2.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a lateral movement mechanism in a clamping device for a concrete formwork. [Background technology]

[0002] The process of forming a concrete product using a formwork includes a process of assembling the formwork and clamping the formwork, and a process of filling the assembled formwork with concrete and removing the solidified concrete product from the formwork.

[0003] The mold assembly process and the mold removal process are carried out, for example, by moving side-by-side mold members. In the case of the prior art document 1 described below, the bottom plate is raised and lowered, or in the case of the prior art documents 2 and 3 described below, the core frame is expanded and contracted. In the demolding process, the concrete product must be separated from the formwork material that is currently adhered to it, creating a gap, which places a greater burden on workers than during the mold assembly process.

[0004] Therefore, the lateral movement mechanisms in the clamping devices for frame materials used in concrete formwork, which are originally intended to easily stabilize the formwork, are being devised to take into account the demolding process at the same time or to a greater extent.

[0005] this Like The concrete formwork device is configured, for example, to link end panels, partition panels, etc., which are arranged side by side to move sideways toward the framework, position and clamp each formwork material, and when removing the formwork, to link end panels, partition panels, etc., to move sideways toward the outside of the framework to form a gap between each concrete product. (For example, Jpn. Jpn. Pub. No. 3-56323 and Jpn. Pub. No. 60-34407, etc.) . In addition, in prior art document 1 described below, a shaft is provided for using a link mechanism to raise and lower the bottom plate, and a mechanism for advancing and retracting a sleeve that is slidably inserted onto the shaft, while in prior art documents 2 and 3, a shaft (axial rod) is arranged in the longitudinal direction between the core frame and the spacer member (push plate), a sleeve is slidably inserted onto the shaft, and a link mechanism for raising and lowering the spacer member is provided between the sleeve and shaft, and the advancing and retracting mechanism for the sleeve and shaft and the link mechanism work together to raise and lower the spacer member, thereby expanding and contracting the core frame.

[0006] And the gable board and the partition board, Shaft etc. are moved sideways. means In many cases, a toggle mechanism is used to move the structure horizontally. The base end of the pivot link is supported by a pivot shaft on the base frame of the formwork, the base end of the swing link is connected to the tip of the pivot link, and the tip of the swing link is connected to the end plate. Lateral movement parts such as operating parts (shafts, axial rods) The structure is adapted to be engaged with the

[0007] In such a mold clamping device for punching out a mold set and a product, when the mold set's mold material is positioned and clamped, the rotating link and the swinging link are in a substantially horizontal, linear positional relationship.

[0008] When removing the mold, remove the clamp and move the rotating link to the end plate, etc. beside By rotating the moving member in the opposite direction, the driven swing link moves laterally toward the outside of the formwork body while swinging. The swing link is locked. beside The movable member also slides sideways in sequence, separating the concrete product from the formwork material that is in an adhered state, creating a gap. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] JP 2012-67855 A [Patent Document 2] JP 2011-148220 A [Patent Document 3] JP 2004-1568 A Summary of the Invention [Problem to be solved by the invention]

[0010] Therefore, the concrete formwork gable plate for product assembly and punching To move lateral movement parts such as shafts and rods In the clamping device, beside The distance (length) that the moving member moves laterally is the length between the rotation axis of the rotating link and the connecting axis with the swing link.

[0011] Therefore, the distance of lateral movement is roughly proportional to the length of the pivot link, and a large movement distance can be obtained by designing the pivot link to be long.

[0012] However, if the rotating link is made longer to increase the distance of lateral movement, a large force is required to rotate it. Rotation of the rotating link is often performed manually by workers. Therefore, there are problems such as an increase in the burden on workers because it is necessary to peel off the concrete product from the formwork material that is in a bonded state, especially when removing the formwork, and a decrease in production efficiency due to the time required for rotation.

[0013] The range of rotation is determined by the positional relationship of the rotary link and the swing link in a substantially horizontal straight line. beside The angle is approximately 180 degrees in the opposite direction to the moving member. When the pivot link is at the top dead center position, if the inclination angle of the pivot link increases, beside This causes a loss in the force pulling the movable member in the horizontal direction, which in turn increases the force required to rotate it, further increasing the burden on the worker.

[0014] SUMMARY OF THE PRESENT DISCLOSURE An object of the present invention is to provide a lateral movement mechanism in a clamping device for concrete forms that reduces the labor burden on workers when removing forms and ensures a long movement distance with as little force as possible. [Means for solving the problem]

[0015] In the clamp for concrete formwork of claim 1 of the present invention beside The moving mechanism is used when assembling and removing the concrete formwork clamping device. beside a mechanism for laterally moving a moving member, comprising a base link, an intermediate link and a swing link, the intermediate link being pivotally supported between the base link, the base end of which is pivotally supported by a formwork, and the swing link, the tip of which is engaged with the moving member, so as to be rotatable relative to each other, and the base link and the intermediate link are rotatable about the pivotal portion of the base link to the formwork and the pivotal portions of the base link and the intermediate link, respectively, as rotation axes; The intermediate link has two engaging portions at the outer circumferential end of the target position on the concentric circle of the rotation axis of the intermediate link. and a locking portion that engages the On the base link, It is provided on the intermediate link side on a straight line connecting the rotation axis of the base link and the pivot support of the intermediate link. That,When the base link and the intermediate link are rotated back and forth, one of the engaging portions of the intermediate link engages with the locking portion of the base link. Effect of the Invention

[0016] By rotating the base link around the pivot support portion of the formwork and the pivot support portion of the base link and the intermediate link as respective rotation axes, beside This has the effect of enabling the movable member to move laterally the distance equal to the combined length of the base link and intermediate link, and also has the effect of reducing the burden on workers because the required rotational force that was previously required for one rotation at a time for each divided link can now be divided into two rotational forces.

[0017] In addition, compared to using a single link, the length of each divided link is shorter, and the inclination angle of the swing link at each top dead center is smaller, so the loss in the pulling direction acting on the lateral movement can be reduced. This reduces the force required for rotation, further reducing the burden on the worker.

[0018] Furthermore, before and after the base link and the intermediate link rotate, one of the engaging portions of the intermediate link engages with the locking portion of the base link, so that before rotation, the base link supports the intermediate link with the support portion (intermediate link rotation axis) and one of the engaging portions, and once it passes the top dead center, it engages with the other engaging portion to prevent the intermediate link from rotating back toward the formwork under its own weight, stabilizing the posture of the intermediate link and achieving the effect of smoothing the rotation of the base link and maintaining the posture of the intermediate link.

[0019] In addition, as the intermediate link shaft rotates, the engagement with the locking portion of the base link shifts from the other engagement portion to one engagement portion, thereby preventing unnecessary rotation of the intermediate link and providing the effect of a stopper. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is a side view of a lateral movement mechanism according to an embodiment of the present invention; [Diagram 2]FIG. 1 is a side view of a lateral movement mechanism according to an embodiment of the present invention; [Diagram 3] FIG. 1 is a side view of a lateral movement mechanism according to an embodiment of the present invention; [Figure 4] FIG. 1 is a side view of a lateral movement mechanism according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] An embodiment of the present invention will be described with reference to the drawings.

[0022] The drawings are for concrete formwork assembly and removal. beside The lateral movement mechanism 1 for laterally moving a moving member comprises a base link 2, an intermediate link 3, and a swing link 4.

[0023] An intermediate link 3 is connected between the base link 2 and the swing link 4 so as to be rotatable with each other.

[0024] The base link 2 has a base link rotation shaft 21 at its base end rotatably supported by a bearing (not shown) erected on the formwork device. The base link 2 is supported in contact with other members of the formwork device at one rotation limit and the other rotation limit where the tip end is slightly lower than the horizontal line than the base end.

[0025] Further, a fitting hole is formed at the tip end of the base link 2, and an intermediate link rotating shaft 31 provided at the base end of the intermediate link 3 is inserted as a bearing and rotatably supported.

[0026] Furthermore, a locking portion 22 is provided on the base link 2 so as to protrude toward the intermediate link 3 on a straight line connecting the base link rotation shaft 21 and the insertion hole (through which the intermediate link rotation shaft 31 is inserted).

[0027] On the other hand, the intermediate link 3 has two recessed engagement portions 32 a and 32 b formed on the outer circumferential end of the intermediate link rotation shaft 31 on the same circle.

[0028] 1(A), one engaging portion 32a of the intermediate link 3 is engaged with and covers the locking portion 22 of the base link 2 during assembly. Also, as shown in Fig. 1(B) and Fig. 2(A), when demolding, the base link rotating shaft 21 is rotated to rotate the base link 2, and from around the top dead center, the other engaging portion 32b is engaged with the locking portion 22.

[0029] A swing link shaft 41 is inserted through the tip end of the intermediate link 3 and the base end of the swing link 4 and is rotatably supported.

[0030] Although not shown in the figure, the tip of the swing link 4 is provided with a die assembly and die removal mechanism. beside The moving members are pivotally connected to one another.

[0031] beside The moving parts are the end plates depending on the type of formwork device. , raising and lowering of the bottom plate and opening and closing of the core (expansion and contraction) These are components such as shafts that operate the actuators.

[0032] The swing link 4 swings and follows the rotation of the base link 2 and the intermediate link 3, and is locked when the die is removed. beside The movable member is moved laterally in an outward direction away from the form body, creating a gap for separating the concrete product from the form material that is in an adhered state.

[0033] Therefore, when assembling the form, the intermediate link rotating shaft 31 and the base link rotating shaft 21 are rotated to link the end plates and the partition plates that constitute the formwork material in parallel and move them laterally toward the framework. Or raise the bottom plate or expand the core frame. Each formwork material is positioned and clamped, concrete is filled into the formwork and allowed to cure, and then the process of removing the formwork begins.

[0034] At this point, as shown in Figure 1(A), beside Between the moving member and the base link rotation shaft 21, the base link 2, the intermediate link 3 and the swing link 4 are aligned in a straight line. Also, one of the engagement portions 32a of the intermediate link 3 is in engagement with the locking portion 22 of the base link 2 so as to cover it.

[0035] In preparation for demolding, after removing the clamp, the worker uses a rotating jig or the like to rotate the base link 2 around the base link rotation shaft 21 to the outside (opposite side) of the formwork device, as shown in Figure 1 (B).

[0036] As shown in FIG. 2A, as the base link 2 rotates, one engaging portion 32a is released and the other engaging portion 32b is engaged so as to be received by the locking portion 22 around the top dead center.

[0037] When the other engagement portion 32b is received by the locking portion 22, the intermediate link 3 is prevented from rotating back toward the formwork under its own weight, and the base link 2 rotates around the base link rotation axis 21 while maintaining a constant positional relationship between the base link 2 and the intermediate link 3.

[0038] 2B, the base link 2 stably supports the intermediate link 3 together with the intermediate link rotation shaft 31 and finishes rotating. As a result, the base link 2 rotates by the length of the base link rotation shaft 21 and the intermediate link rotation shaft 31 from the state shown in FIG. 1A to the state shown in FIG. 2B. beside The movable member can be moved to the right in the figure, that is, to the outside of the formwork device.

[0039] Next, as shown in Figures 3(A) and (B), the worker uses a rotating jig or the like to rotate the intermediate link 3 around the intermediate link rotation shaft 31, this time toward the outside of the formwork device.

[0040] The intermediate link rotating shaft 31 is inserted into the insertion hole of the base link 2 and rotatably supported therein, so that even if the intermediate link rotating shaft 31 rotates, the base link 2 remains in place without being affected.

[0041] Also, the engaging portion 32b is engaged so as to be received by the locking portion 22. As shown in Figures 3(A) and (B), the intermediate link 3 is capable of rotating in a direction in which the engaging portion 32b moves away from the locking portion 22 relatively.

[0042] When the intermediate link rotation shaft 31 is further rotated toward the outside of the formwork device, the intermediate link 3 rotates to a horizontal position as shown in FIG.

[0043] 4, one of the engaging portions 32a comes into contact with and engages with the locking portion 22 of the base link 2. This serves as a stopper for the rotation of the intermediate link 3.

[0044] As shown in Fig. 4, the intermediate link 3 and the base link 2 rotate to a position where they are in a straight line to the right of the base link rotation shaft 21. As a result, from the state shown in Fig. 1(A) to the state shown in Fig. 4, beside The moving member has a length from the base link rotation shaft 21 to the swing link shaft 41, beside The movable member can be moved to the right in the figure, that is, to the outside of the formwork device.

[0045] The process is divided into a process in which the base link 2 rotates from FIG. 1(A) to FIG. 2(B) and a process in which the intermediate link 3 rotates from FIG. 3(A) to FIG. Since the base link 2 and the intermediate link 3, which are rotated in each of the two steps, can be shortened, the force required for rotation can be divided into two, thereby avoiding the need to use a large force all at once.

[0046] In addition, since the inclination angle of the swing link 4 at each top dead center in FIG. 1(B) and FIG. 3(A) is small, loss in the pulling direction acting on the lateral movement can be reduced, and the force required for rotation can be reduced.

[0047] The above describes the present invention in detail with reference to the drawings. However, the present invention is not limited to the above embodiment, and can be applied to other embodiments without departing from the spirit of the invention. [Explanation of symbols]

[0048] 1 Lateral movement mechanism 2 Base Link 21 Base link rotation axis 22 Locking part 3 Intermediate Links 31 Intermediate link rotation axis 32A,32B Engagement part 4 Swing Link 41 Swing link shaft

Claims

[Claim 1] A mechanism for laterally moving a lateral movement member when assembling and demolding a clamping device for a concrete formwork, comprising a base link, an intermediate link and a swing link, The intermediate link is supported between the base link, the base end of which is supported by the formwork, and the swing link, the tip of which is engaged with the lateral moving member, so as to be rotatable relative to each other, and the base link and the intermediate link are made rotatable about the pivotal portion of the base link to the formwork and the pivotal portions of the base link and the intermediate link, respectively, as rotation axes; The intermediate link is provided with two engaging portions at the outer circumferential end at target positions on a circle concentric with the rotation axis of the intermediate link, and an engaging locking portion is provided on the base link on the intermediate link side on a straight line connecting the rotation axis of the base link and the pivot support portion of the intermediate link; A lateral movement mechanism in a clamping device for concrete formwork, characterized in that when the base link and the intermediate link rotate back and forth, one of the engagement portions of the intermediate link engages with the locking portion of the base link.

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