JP2520562B2 - Clamping device for concrete form - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete mold clamping device, for example, a device for clamping a mold for molding a tubular concrete product such as a box culvert or a tubular body.

[0002]

2. Description of the Related Art As a mold clamping device of this type of concrete formwork, for example, it has front and rear and left and right formwork bodies in which joint ends intersecting each other are pivotally supported by a support shaft to be opened and closed, and
A plurality of bolt insertion holes are formed to face each other at the joint ends of at least two mold bodies to be joined to each other. There is a structure in which two mold frames are screwed together to clamp each other.

[0003]

In the above structure, when the two mold bodies are clamped together, the plurality of bolt insertion holes formed at the joint ends thereof are aligned with each other. In addition to requiring an operation, a bolt is inserted into each of these bolt insertion holes, and an operation of screwing and tightening a nut on each bolt is required.
There is a problem that a large number of steps are required for the mold clamping operation and the mold opening operation for the two mold frames, which is not preferable in improving the work efficiency as a whole.

The present invention has been made in view of the above point, and it is possible to easily align the joining ends of the two mold bodies with each other, and to easily and easily join the joining ends. Since they can be reliably connected, the mold clamping operation and the mold opening operation of the two mold bodies can be easily performed, and the mold clamping operation and the mold opening operation can be easily performed even in a narrow place. An object of the present invention is to provide a mold clamping device for a concrete formwork, which can improve operability as a whole and is preferable in improving work efficiency.

[0005]

SUMMARY OF THE INVENTION A concrete formwork mold clamping device of the present invention comprises at least two formwork bodies which are joined to each other, and one of the formwork bodies is engaged with a joining end portion thereof. A connecting body having a recess is rotatably supported by a support shaft,
A locking recess is formed in the vicinity of the support shaft, and a connecting rod having a handle at its joint end is rotatably supported on the other mold body, and the connecting rod is provided with the connecting rod. Locking projections integrally provided on the locking recesses to engage with the locking recesses, the locking projections being located in the vicinity of the connecting rod and releasably fitted into the locking recesses. Is formed.

[0006]

In the mold clamping device for concrete formwork of the present invention, when the joining end of the other formwork body is moved toward the joining end of one formwork body, the joining end of this one formwork body is moved. The engaging projection of the joining end of the other mold body is fitted in the engaging recess of the other part, and the engaging end of the two molds are mutually engaged by the engaging recess and the engaging projection. Aligned.

Further, the engaging projection formed on the connecting rod of the joining end of the other mold body is engaged with the engaging concave portion formed on the joining body of the joining end of one mold body. When the handle protruding from the connecting rod is rotated in this state, the connecting rod is rotated by this handle, and the connecting body is supported by the engaging convex portion of the connecting rod via the engaging concave portion. Is rotated toward the other mold body side, and the engaging convex portion is moved to a position displaced to the other mold frame side with respect to the axis line in the direction connecting the center of the connecting rod and the center of the support shaft. Thus, the connection rod and the connection body are strongly clamped, and the joint ends of the two mold frames are strongly clamped to each other.

Therefore, the joint end of one mold body and the joint end of the other frame body are easily clamped via the connecting rod and the connecting body, and this clamped state is easily locked. To be done.

Next, when opening the mold for one mold body and the mold for the other mold, the handle is rotated in the direction opposite to the direction of the mold clamping operation. Between the engaging convex portion of the connecting rod and the connecting body by moving the engaging convex portion in the direction away from the other mold body with respect to the axis line in the direction connecting the center of the connecting rod and the center of the support shaft. Is released, and the mold clamping between the joint end of one mold body and the joint end of the other mold body is easily released. Then, the one mold frame and the other mold frame are easily opened.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of an embodiment of the present invention will be described below with reference to the drawings.

In FIG. 3, reference numeral 1 is an inner frame for forming a box culvert product, and this inner frame 1 has a front side mold body 2 at both left and right ends of the front side mold frame 2. One end of each of the left and right mold frames 4 and 5 facing each other via a vertical pivot shaft 3 is openably and closably attached, and the right end of the mold frame 4 has a vertical direction. One end of a rear mold body 7 that faces the front mold body 2 via the rotation center shaft 6 is pivotally mounted so as to be openable and closable.

Therefore, the front and rear, left and right mold bodies 2,
4, 5, 7 have template plates 8, 9, 10, 11 in the vertical direction,
A plurality of reinforcing frame bodies 12, 13, 14, 15 are integrally fixed in a multi-stage manner inside the respective template plates 8, 9, 10, 11 at predetermined intervals in the vertical direction. . Then, a series of molding dies 16 are formed by the mold plates 8, 9, 10, and 11.

Next, between the other end of the left-side mold body 5 and the other end of the rear-side mold frame 7, the joint ends of the mutual molds are detachably clamped. A mold clamping device 17 is provided. The mold clamping device 17 is arranged in series at the outer end of the mold plate 10 at the other end (joint end) of the one mold frame, that is, the left mold frame 5 so that the upper and lower parts are connected to each other. A vertical extension template 18 is integrally formed on the outer end of the reinforcing frame body 14, and a plurality of vertical brackets 19 are provided inside the extension template 18.
Are projecting integrally with each other.
A vertical support shaft 20 is vertically supported by the.

A plurality of connecting bodies 21 are horizontally supported on the support shaft 20 at predetermined intervals in the vertical direction so as to be rotatable in the horizontal direction. Each connecting body 21 is formed in a substantially C shape in a plan view, each base end portion thereof is rotatably supported by the support shaft 20, and an engaging concave portion 22 is formed at a tip end portion thereof. An adjusting bolt 23 is screwed into each of the engaging recesses 22 with its tip end facing forward and backward. Also,
An interlocking rod 24 is integrally fixed to each of the connecting bodies 21, and the interlocking rod 24 allows the connecting body 21 to be horizontally interlocked with the support shaft 20 as a center.

A plurality of locking plates 25 are arranged in the vertical direction between the inner portion of the extension template 18 and the template 10 located between the outer ends of the upper and lower reinforcing frames 14, respectively. Horizontally integrally fixed, each locking plate 25 is formed with a locking recess 26 located in the vicinity of the support shaft 20 and having an opening on the inside thereof, and separated from the support shaft 20. Guide edges 27 that are inclined toward the locking recesses 26 are formed on the inner edges.

Further, a plate-shaped connecting frame 28 in the vertical direction is integrally fixed to the other end of the other frame, that is, the rear side frame 7 (joint end). A plurality of brackets 29 are integrally provided so as to be opposed to each other at predetermined intervals in the up-down direction, and vertically connecting rods 30 vertically arranged on the upper and lower brackets 29 are rotatable. It is supported. Further, the connecting rod 30 has an engaging concave portion of each connecting body 21 in a vertical direction at a position corresponding to each connecting body 21.
Axle-shaped engaging protrusions 31 that engage with and disengage from the rods 22 are integrally projected, and a handle 32 is detachably attached to the upper portion of the connecting rod 30. ing.

Further, each of the locking plates 25 is attached to the connecting rod 30.
The engaging plates 33 are integrally fixed horizontally in a vertical direction at positions corresponding to the engaging plate 33, and the engaging plate 33 is engaged with and disengaged from the engaging recesses 26 of the engaging plates 25 at the outer ends thereof. A locking projection 34 that freely fits is integrally formed to project. Then
Since the one end of the rear mold body 7 is opened and closed about the rotation center axis 6 between the other end of the right mold body 4 and the other end (joint end). Each of the locking projections 34 projecting from the (part) is guided by the guide edge 27 of each locking plate 25 and fitted into each locking recess 26.

Next, the operation rods 35 in the up and down directions located on the other side portions are rotatably supported by the mold frames 4 and 5 on both the left and right sides. A cam mechanism that engages with a cam guide (not shown) and rotates at the lower end
36 are attached. Then, the formwork bodies 4 and 5 on both left and right sides are opened and closed about the respective rotation center shafts 3 by the cam mechanism 36 which is rotated by the cam guide and the operating rod 35. ing. A plurality of casters 38 that roll along the fixed substrate 37 are attached to the lower ends of the front, rear, left and right mold bodies 2, 4, 5, and 7, respectively.

Next, the operation of the above embodiment will be described.

First, when the mold bodies 2, 4, 5, 7 are matched with each other, the cam mechanism is operated by the operation rod 35 of the left mold body 5.
When the 36 is rotated, the left mold frame 5 is closed and rotated by the cam mechanism 36 and the cam guide around the left rotation center shaft 3 of the front mold frame 2, and the left mold frame 5 is rotated. The body 5 is modeled in a state where it intersects with the front mold body 2. When the cam mechanism 36 is rotated by the operating rod 35 of the right mold body 4, the right mold body 4 is rotated by the cam mechanism 36 and the cam guide to the right of the front mold body 2. The mold frame 4 on the right side is closed and rotated about the central shaft 3, and the mold frame 4 on the right side
It is shaped to intersect with.

When the rear mold frame 7 is pushed in the closing direction, the rear mold frame 7 is closed and rotated about the rotation center shaft 6 between the rear mold frame 7 and the right mold frame 4. And the formwork 7 on the rear side
The joining end of the other end of the mold is engaged with the joining end of the other end of the left mold frame 5, and at this time, each locking plate of the left mold frame 5 is engaged.
The respective locking protrusions 34 projecting from the respective engaging plates 33 of the rear mold body 7 are brought into contact with the respective guide edge portions 27 formed on the 25, and are guided by the respective guide edge portions 27. The locking projections 34 are fitted into the locking recesses 26. Then, the joint end of the left mold frame 5 and the joint end of the rear mold body 7 are aligned with each other by the respective locking projections 34 and the respective locking recesses 26.

Further, the support shaft 20 at the joint end of the left frame 5
The rear side of the mold body 7 is fitted in the engaging recess 22 of each connecting body 21 pivotally supported by
When engaging the engaging projections 31 projecting on the connecting rod 30 at the joining end of the and rotating the handle 32 projecting on the connecting rod 30 pivotally supported by each bracket 29, handle
The connecting rod 30 is rotated by 32, and at the engaging convex portions 31 of the connecting rod 30, each connecting body 21 is engaged with the engaging concave portion 22 so that the connecting body 21 is centered on the support shaft 20 and the rear form frame is formed. The mold 7 is rotated toward the connecting frame 28 side of the body 7, and each of the engaging protrusions 31 connects the mold frame 7 on the rear side with respect to the axis in the direction connecting the center of the connecting rod 30 and the center of the support shaft 20. By moving to the position displaced to the frame 28 side, the connection rod 30 and each connection body 21 are strongly tightened, and the joint end portion of the left side frame body 5 and the rear side frame body 7 are connected.
The die and the joint end are strongly clamped together.

Therefore, the joint end of the left mold body 5 and the joint end of the rear mold body 7 are easily clamped via the connecting rod 30 and each connecting body 21, and The tightened state is easily locked. Then, the front and rear left and right formwork bodies 2,
The middle frame 1 is formed in a substantially rectangular shape in plan view by 4, 5 and 7, and the mold is clamped.
A series of molding dies 16 is constituted by the mold plates 8, 9, 10 and 11 of 5 and 7.

Next, when the mold frame 1 is opened, the handle 32 is rotated in the direction opposite to the direction of the mold clamping operation, whereby the engaging projections 31 of the connecting rod 30 are connected. The engaging protrusions 31 of the connecting rod 30 are moved by being moved in a direction away from the connecting frame 28 of the rear mold frame 7 with respect to an axis line connecting the center of the rod 30 and the center of the support shaft 20. Clamping between the connection concave part of each of the connecting bodies 21 and the engagement concave part 22 of each connecting body 21 is released, and the mold clamping between the joint end of the left mold frame 5 and the joint end of the rear mold body 7 is easily released. It

The rear mold frame 7 is replaced by the front mold frame 2
When the rear mold frame 7 is pulled toward, the rear mold frame 7 is opened and rotated toward the front mold frame 2 about the rotation center shaft 6, and the respective engagement plates 33 of the rear mold frame 7 are rotated. The respective locking projections 34 projecting from the above are disengaged from the respective locking recesses 26 formed in the respective locking plates 25 of the left mold frame 5, and the left mold frame 5 and the rear mold frame 7 are removed. Can be easily opened.

When the cam mechanism 36 is rotated by the operating rod 35 of the right mold body 4, the right mold body 4 is moved to the right side of the front mold body 2 by the cam mechanism 36 and the cam guide. The mold is opened and rotated around the rotation center shaft 3 and the mold 4 on the right side is easily opened toward the mold 2 on the front side. At this time, since the rear mold frame 7 is connected to the other end of the right mold frame 4 via the rotation center shaft 6, the right mold frame 4 can be opened and rotated. In conjunction with this, the rear mold body 7 is further opened and rotated.

Further, when the cam mechanism 36 is rotated by the operating rod 35 of the left mold body 5, the left mold body 5 is left side of the front mold body 2 by the cam mechanism 36 and the cam guide. The mold is opened and rotated around the rotation center shaft 3 and the mold 5 on the left side is easily opened toward the mold 2 on the front side. Therefore, the middle frame 1 is easily opened.

When the middle frame 1 is matched and the molds are opened, the front, rear, left and right mold frames 2, 4,
Since 5 and 7 have a plurality of casters 38 at their lower end portions, each caster 38 causes each mold body 2, 2.
4, 5, and 7 are smoothly opened and closed.

Further, in the above case, since the adjusting bolts 23 are respectively screwed into the engaging concave portions 22 formed in the respective connecting bodies 21 so as to be able to move forward and backward, the adjusting bolts 23 are rotated to adjust the forward and backward movements. By doing so, it is possible to easily perform the mold clamping adjustment operation by each connecting body 21 and each engaging convex portion 31 of the connecting rod 30, and easily correct the excess or deficiency of the mold clamping condition to set the proper state. can do.

In the above embodiment, when the locking projections 34 of the rear mold frame 7 are fitted into the locking recesses 26 of the left mold frame 5, the support shaft 20 is driven by an operating means (not shown). , Each connecting body 21 is automatically rotated toward the connecting rod 30 side,
The engaging concave portions 22 of the connecting bodies 21 and the engaging convex portions of the connecting rods 30.
By engaging 31 with each other, the joint end of the left mold frame 5 and the joint end of the rear mold body 7 are more easily clamped.

[0031]

According to the present invention, a connecting body having an engaging concave portion at its joint end is rotatably supported by a support shaft on one of the mold bodies, and is provided near the support shaft. And a locking recess is formed at the position, and a connecting rod having a handle at its joint end is rotatably supported on the other mold body, and the connecting rod is engaged with and disengaged from the engaging recess of the connecting body. Since the engaging convex portion that freely engages is integrally projected, and the engaging convex portion that is located near the connecting rod and that engages with the engaging concave portion in a disengageable manner is formed. By fitting the locking convex portion of the other mold body into the locking concave portion of the mold body, the joint ends of the two mold bodies can be easily aligned in preparation for connection. By engaging the engaging convex portion of the connecting rod of the other mold body with the engaging concave portion of the connecting body of one mold body and rotating the connecting body in the tightening direction by the connecting rod, Of Since the joint ends of the frame bodies can be easily and reliably connected to each other, the mold clamping operation and the mold opening operation between the two mold bodies can be easily performed, and the mold clamping operation and the mold can be performed even in a narrow space. It is possible to easily perform the opening operation, and therefore, it is possible to improve the operability as a whole and to provide a mold clamping device for a concrete formwork which is preferable in improving work efficiency.

[Brief description of drawings]

FIG. 1 is a plan view showing a mold clamping device for a concrete formwork showing an embodiment of the present invention.

FIG. 2 is a plan view showing a state in which two mold frames are clamped together.

FIG. 3 is a plan view of the same mold.

FIG. 4 is a vertical sectional view of the same.

[Explanation of symbols]

 5 One mold frame 7 The other mold frame 20 Support shaft 21 Connection body 22 Engagement concave portion 26 Engagement concave portion 30 Engagement rod 31 Engagement convex portion 32 Handle 34 Engagement convex portion

Claims (1)

(57) [Claims] 1. A connecting body having at least two mold bodies joined to each other, wherein a connecting body having an engaging concave portion at a joining end thereof is rotatably supported by a spindle. Then, a locking recess is formed in the vicinity of the support shaft, and a connecting rod having a handle at its joint end is rotatably supported on the other mold body, and the connecting rod is provided with the connecting rod. An engaging projection that integrally engages with the engaging recess of the connecting body in a projecting manner is integrally projected, and the engaging projection is located near the connecting rod and engages with the engaging recess in a detachable manner. A mold clamping device for a concrete formwork, characterized in that a convex portion is formed.