JPH11320539A - Mold open/closure device of concrete form - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mold open/closure device of a concrete form wherein a mold can be easily opened in the form provided with a core. SOLUTION: A form 1 comprises side plates 3 and a core 5 provided within the side plates 3. A lifting rod 9 is connected to the core 5 so as to be movable vertically. A core lifting mechanism 44 comprising a cam mechanism which lifts the rod 9 to lift the core 5 is provided for a rotary body 31 and the rod 9. A side plate form open/closure mechanism 45 comprising a cam mechanism for opening the side plates 3 outwardly is provided. Axes 37A are provided in a rotary arm 35 integral with the rotary body 31 and a cam groove 36 is formed in the side walls 3. If the body 31 is rotated so that the core 5 is lifted in a form opening direction by means of the mechanism 44, the side plates 3 open the form in association with the lifting action of the core.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete mold opening and closing device for molding a concrete product.

[0002]

2. Description of the Related Art In a mold for molding a concrete product,
A side plate part for molding the side shape of the product is provided so as to be deployable, a core is arranged in the hollow part of the product, concrete is filled in the mold, and after curing, the side plate part is opened, and the product or the core is removed. The mold is opened by moving in the drawing direction.

[0003] Further, as a method using a core, for example,
Japanese Patent Application Laid-Open No. 5-71965 discloses a groove block molding core, which has a split groove in a longitudinal direction and is formed to be radially expandable and contractible. A screw rod is supported inside, and a wedge member that fits into the core-shaped split groove is connected to a nut member screwed to the screw rod via a connection link. Then, after the block is formed, when the mold is opened, a gap is formed between the block and the core mold by rotating the screw rod, moving the nut member in a direction away from each other, and squeezing the core mold inward. , To pull out the core type.

However, in each of the above molds, after the core is pulled out, the side plate portion is opened, or after the side plate portion is opened,
Since the core is pulled out, the mold opening operation of the core and the side plate has two steps, and the operation is complicated.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a concrete mold opening / closing apparatus capable of easily performing mold opening and closing operations in a mold provided with a core.

[0006]

According to a first aspect of the present invention, there is provided a mold opening / closing apparatus for a concrete formwork having a side plate and a core disposed in the side plate. A core elevating mechanism for elevating and lowering the elevating member and elevating the core, and a side plate part opening / closing mechanism for opening the side plate part outward in conjunction with the core elevating operation of the core elevating mechanism; The side plate opening and closing mechanism is engaged with the upper and lower sides of the side plate, respectively. When the core is raised and lowered in the mold opening direction by using a core lifting mechanism, the side plate is linked with the core lifting operation. The side plate is opened by the mold opening / closing mechanism. In this case, the side plate opening / closing mechanism is engaged with the upper and lower sides of the side plate, respectively, so that the mold opening and closing operations of the side plate can be stably performed.

[0007] The invention according to claim 2 is that the elevating member is connected to the core so as to be vertically movable.

According to the configuration of the second aspect, the lowering of the core can be performed smoothly.

Further, the invention according to claim 3 is characterized in that the core elevating mechanism comprises the elevating member provided along the elevating direction,
A rotating body rotatably provided on the elevating member, a cam engaging portion for elevating provided on one of the elevating member and the rotating body, and a rotating member provided on the other of the elevating member and the rotating body. A lifting / lowering cam groove with which the lifting / lowering cam engaging portion engages, wherein the side plate portion type opening / closing mechanism is provided with a die opening / closing cam member provided above and below any one of the side plate portion and the rotating body. And a mold opening / closing cam groove provided on the upper and lower sides of the side plate portion and the other of the rotating body and engaged with the mold opening / closing cam engaging portion, respectively. The elevating member moves up and down by the engagement of the elevating cam groove and the elevating cam engaging portion, and the core is released. When the rotating body rotates, the side plate portion is opened outward by the engagement between the mold opening / closing cam groove and the mold opening / closing cam engaging portion.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 5 show a first embodiment of the present invention. A mold 1 includes a bottom plate 2, four side plates 3, 3, 3, 3 arranged around the bottom plate 2, and these side plates. 3, 3, 3, 3 and a square core 5 arranged in the inside. An inner surface of the side plate portion 3 is in contact with an outer peripheral edge 2A of the bottom plate portion 2, and an elastic seal member 6 is provided on a lower surface of the outer peripheral edge 2A to be in pressure contact with the inner surface of the side plate portion 3. A square hole 7 is formed in the center of the bottom plate 2, and the core 5 having a square cross section is inserted into the mold 1 from the hole 7. The core 5 is engaged, and the core 5 is stopped. Further, the bottom plate 2 is fixedly provided on the base body 8. Further, as shown in FIG.
A butting edge 3 </ b> C extending outward from the center of the mold 1 is provided. Further, the base plate 8 supports the side plate portion 3 so as to be movable at the time of opening and closing the mold.

The core 5 is hollow, and integrally has an upper surface 11 and a side surface portion 12 having a substantially rectangular flat cross section which is slightly reduced upward. The upper end of a vertical lifting rod 9 as a member is connected. The upper surface part 11
A tapered hole 14 is formed at the center of the upper surface portion 11, a retaining cylinder 15 is provided on the lower surface of the upper surface portion 11, a bearing hole 16 is provided in a lower hole of the retaining cylinder 15, and the The rod 9 is provided so as to be vertically movable, and a flange-shaped retaining portion 17 is provided on the upper end side of the elevating rod 9. The retaining portion 17 is a retaining cylindrical body.
Within 15, it is provided to be able to move up and down. Also,
In the lower part of the side part 12, a square bottom part with an opening at the center
A guide member 19 is integrally provided at the upper center of the bottom portion 18, and a hole 19 in the center of the guide member 19 is provided.
A, the lifting and lowering rod 9 is loosely inserted therein, and further, the guide member
19 has a plurality of thrust bearing holes 20. A pressing member 21 is disposed above the connecting member 19 with a small gap h, and the pressing member 21 is fixed to the lifting rod 9, and the thrust bearing hole is provided in the pressing member 21.
A guide rod 22 that moves up and down along 20 is provided. On the periphery of the bottom portion 18, an elastic seal member 23 is provided which is in pressure contact with the lower surface of the hole 7 of the bottom plate portion 2.
The elastic seal member 23 may be provided on the lower surface of the hole 7 of the bottom plate 2. A rotating member 31 having a substantially cylindrical shape is provided at a lower portion of the elevating rod 9 so as to be rotatable by a bearing member 32 provided on the base body 8. A plurality of engaging portions 33 are protruded, and in this example, pin-shaped elevating and lowering cam engaging portions 33 are protruded at two front and rear portions. Elevating cam grooves 34, 34 are formed in the rotating body 31 corresponding to the elevating cam engaging portions 33, 33, respectively.
The elevating cam engaging portions 33, 33 are engaged with 34, 34, respectively. As shown in FIG. 2, the elevating cam groove 34 includes an inclined portion 34A that is obliquely downward on one side and a horizontal portion 34B that is provided in parallel from the inclined portion 34A to one side.
A bending point 34C is provided between the horizontal portion 34B and the horizontal portion 34B.
The horizontal portion 34A is on one side in the rotation direction, and the inclined portion 34B
Is provided on the other side in the rotation direction.

A rotary arm 35 constituting a part of the rotary body 31 is provided integrally with the upper portion of the rotary body 31. The rotary arm 35 has a substantially cross shape in a plan view, and an outer end thereof is formed in the side plate portion 3.
It extends to the outside position of. The side plate portion 3 has upper and lower horizontal outer flange portions 3A and 3B, respectively. The outer flange portions 3A and 4B are plate members having the same shape, each having an arcuate outer shape and a long hole shape. The mold opening / closing cam groove 36 is formed. The mold opening / closing cam groove 36 has an arc shape in which one side 36A is located outside the other side 36B when the side plate portion 3 is closed, and this arc is substantially centered on the rotating body 31. is there. A projecting cam engaging member 37 is vertically provided at each end of the rotating arm 35, and this cam engaging member 37 is provided.
Has a circular shaft portion 37A serving as a mold opening / closing cam engaging portion. The shaft portion 37A is fixed to the rotating body 31 and engages with the cam groove 36 of the lower outer flange portion 3B. doing. A substantially U-shaped upper and lower connecting member 38 is disposed between the upper and lower outer flange portions 3A and 3B, and the upper portion of the cam engaging member 37 is fixed to a lower plate 38B of the upper and lower connecting member 38. I have. The upper and lower connecting members 38 also constitute a part of the rotating body 31. further,
A cam engaging member projecting from the upper plate 38A of the upper and lower connecting member 38
The cam engaging member 39 has a circular shaft portion 39A, and the mold opening / closing cam groove 36 into which the shaft portion 39A engages is formed in the upper outer flange portion 3A. Have been. Also,
Around the side plate portion 3, a hollow circular outer frame 40 is provided with a gap S therebetween, and the outer frame 40 is provided on the base body 8. Further, an operation handle 41 projecting outward from between the outer frames 40 is provided vertically on the upper and lower connecting member 38. The outer frame 40 has a ring-shaped guide portion 40.
A is provided, and the upper plate portion 38A of the upper and lower connecting member 38 rotates along the inner edge of the guide portion 40A. Further, a fixing tool 42 is provided on one of the upper and lower connecting members 38, and the fixing tool 42 as a fastening means has a receiving portion 43 which can be engaged and disengaged, and the receiving portion 43 is provided on the outer frame 40. When the side plate 3 is closed, the locking portion 42A of the fixing tool 42 is locked to the receiving portion 43, so that the butting edge 3C of the side plate 3 is fixed in a pressed state. That is, by locking the locking portion 42A to the receiving portion 43 and rotating the handle 42B of the fixture 42 to the fixed side, it is possible to obtain a tightening force for rotating the rotary arm 35 to one side. A core elevating mechanism as a cam mechanism is formed by the elevating cam engaging portion 33 and the elevating cam groove.
44, the shaft portions 37A, 39A and the mold opening / closing cam groove 3.
The side plate type opening / closing mechanism 45, which is a cam mechanism, is constituted by 6, 36.

Next, the method of using the mold 1 will be described. As shown in FIGS. 2 and 5, when the elevating cam engaging portion 33 is engaged with the upper end of the inclined portion 34A, the core 5 The elastic seal member 23 is pressed against the lower surface of the hole 7 of the bottom plate portion 2, and the shaft portions 37A and 39A are located on one side 36A of the mold opening / closing cam groove 36 as shown in FIG. 3 comrades butt 3
C is pressed and the mold is closed. In FIG. 3, the side plate portion 3 in the mold closed state is indicated by a dashed line. Also fixtures
By locking the locking portion 42A of 42 to the receiving portion 43, the side plate portion 3 is fixed with the butting edges 3C, 3C pressed against each other.
Concrete is filled into the form 1 from above, and after hardening, a concrete product is molded. In opening the mold after this molding, the locking portion 42A of the fixture 42 is removed from the receiving portion 43. Then, when the rotating arm 35 is rotated to the other side (clockwise in FIG. 3) by using the operation handle 41 as an operation unit,
The shaft portions 37A and 39A rotate around the rotating body 31. Then, the mold opening / closing cam groove 36 with which the shaft portions 37A, 39A engage.
The other side 36B is closer to the center of the rotating body 31 than the one side 36A, and as shown in FIG. 5, the length L from the center of the rotating body 31 to the stop of the one side 36A is When the shaft portions 37A and 39A that rotate around the rotating body 31 rotate to the other side, the cam groove for opening and closing the mold is longer than the length L1 to the other side 36B.
A force is generated to move the side plate part 3 in parallel, and the side plate part 3 provided with the mold opening / closing cam groove 36 moves outward, and the side plate part 3 is opened. At the same time, the rotating body 31 also rotates in the other direction,
Since the elevating rod 9 does not rotate due to the engagement between the hole 7 and the core 5, the elevating cam engaging portion 33 is connected to the horizontal portion 34 of the elevating cam groove 34.
When the lifting rod 9 provided with the lifting / lowering cam engaging portion 33 is engaged with the lower lever B, the core 5 is lowered and the core 5 is opened. In this case, as shown in FIG. 2, when the lifting rod 9 starts to descend, first, no force is generated by the lifting rod 9 to pull down the core 5 until the pressing member 21 contacts the connecting member 19. Until the core 5 comes into contact with the core 5, the core 5 can be lowered only by its own weight, and can be easily removed from the concrete product. In the closed state of the core 5 indicated by a solid line in FIG. 2, the distance h between the upper surface of the connecting member 19 and the lower surface of the pressing member 21 is a distance H between the center of the upper end of the inclined portion 34A and the center of the horizontal portion 34B. The distance H is smaller than that of the inclined portion 34A.
Is the height difference between the center of the upper end and the horizontal portion 34B. When the pressing member 21 descends and comes into contact with the connecting member 19, the lifting rod 9
Is transmitted to the core 5, and the core 5 descends. After opening the mold in this manner, conversely, when the rotating arm 35 is rotated to one side using the operation handle 41, the core 5 rises and the side plate 3 is closed. And also the interval h
The lifting rod 9 is connected to the core 5 so as to be able to move up and down.

As described above, in the present embodiment, the side plate portions 3, 3, 3, 3 and the side plate portions 3, 3, 3,
In a concrete mold opening device having a core 5 disposed in the core 3, an elevating rod 9 serving as an elevating member connected to the core 5 and elevating the elevating rod 9 to elevate the core 5. A core raising / lowering mechanism 44 and a side plate type opening / closing mechanism 45 for opening the side plates 3, 3, 3, 3 outwardly in conjunction with the core raising / lowering operation of the core lifting / lowering mechanism 44 are provided. Shafts 37A and 39A of mechanism 45
Are engaged with the upper and lower mold opening / closing cam grooves 36, 36 of the side plate portion 3, respectively.
When the is lifted and lowered in the mold opening direction, the side plate 3 is opened by the side plate mold opening / closing mechanism 45 interlocked with the core lifting operation, and the mold opening operation is easily performed in the mold 1 using the core 5. Can be. In addition, since the side plate opening / closing mechanism 45 is engaged with the upper and lower sides of the side plate, respectively, the side plate 3 can be stably opened and closed.

Further, as described above, according to the present embodiment, claim 2
Accordingly, since the lifting rod 9 as the lifting member is connected to the core 5 so as to be vertically movable, the lowering of the core 5 can be performed smoothly.

Further, in this embodiment, in accordance with the third aspect, the core elevating mechanism 44 includes an elevating member 9 which is an elevating member provided along the elevating direction, and pivots on the elevating rod 9. A rotatable member 31 provided so as to be able to move, and an elevating cam engaging portion 33 provided on the elevating rod 9 which is one of the elevating rod 9 and the rotator 31.
And an elevating cam groove 34 provided on the elevating rod 9 and the rotating body 31 which is the other of the rotating body 31 and engaged with an elevating cam engaging part 33. The side plate part type opening / closing mechanism 45 includes the side plate part 3 And shaft portions 37A and 39A serving as mold opening / closing cam engaging portions provided on a rotating arm 35 of the rotating body 31 which is the other of the rotating body 31 and the side plate portion 3 which is one of the side plate portion 3 and the rotating body 31. Are provided on the outer flanges 3A, 3B, and the mold opening / closing cam grooves 36, 36 are engaged with the shaft opening / closing cam engaging portions 37A, 39A. The engagement between the lifting cam grooves 34, 34 and the lifting cam engaging portions 33, 33 raises and lowers the lifting rod 9, lowers the core 5 and removes the mold. The side plate portion 3 is opened outward by the engagement between the opening / closing cam grooves 36, 36 and the shaft portions 37A, 39A, and the rotating body 31 is rotated.
The mold opening operation can be easily performed in the mold 1 using the core 5.

Also, as an effect of the embodiment, since the horizontal portion 34B is provided in the elevating cam groove 34, the core 5
Can be stably supported. Further, since the elastic seal member 23 is provided, the core 5 and the bottom plate 2 when the mold is closed.
And the sealing performance can be improved. Also, a fixing member 42 is provided at one place, and a plurality of side plate portions 3
3, 3 and 3 are obtained, and the side plate 3 is provided with the butting edge 3C. The fastening force of the fixing tool 42 causes the butting edges 3C and 3C to press against each other. High sealing performance is obtained. Therefore, unlike the related art, it is not necessary or necessary to fix the side plates 3 together with a fastener such as a bolt and a nut, and the number of the fasteners can be reduced by operating only the fastener 42. Further, since the core 5 has a shape that expands in a tapered shape in the downward direction that is the mold opening direction, the mold opening is easy. Further, since a plurality of pairs of the lifting / lowering cam engaging portions 33 and the lifting / lowering cam grooves 34 are provided, the upper structure of the mold 1 can be stably supported by these.

FIG. 6 shows a second embodiment of the present invention and the first embodiment.
The same reference numerals are given to the same portions as those in the embodiment, and the detailed description thereof will be omitted. In this example, the upper flange portion 3 of the side plate portion 3 will be described.
The cam engaging member 39 is fixedly provided at A, and the mold opening / closing cam groove 36 into which the shaft portion 39A is engaged is formed on the upper outer plate portion 3A. In addition, although not shown in the drawings, an upper and lower connecting member 38 is provided integrally with the rotary arm 35, and the mold opening / closing cam groove 36 is provided at a tip end of the rotary arm 35, and a shaft portion engaged with the cam groove 36 is provided. A cam engaging member 37 having 37A is provided on the lower outer flange 3B.

As described above, this embodiment also has the same functions and effects as those of the first embodiment, corresponding to the first and second aspects.
Further, in accordance with the third aspect, the core lifting mechanism 44 includes a lifting rod 9 as a lifting member provided along the lifting direction, a rotating body 31 rotatably provided on the lifting rod 9, Elevating cam engaging portion 33 provided on elevating rod 9 which is one of rod 9 and rotating body 31, and elevating cam engaging part provided on rotating body 31 which is the other of elevating rod 9 and rotating body 31. The side plate-type opening / closing mechanism 45 includes an outer flange portion 3 </ b> A, 3 </ b> A of the side plate portion 3 which is one of the side plate portion 3 and the rotating body 31.
Shaft portions 37A and 39A serving as a mold opening / closing cam engaging portion provided on B
And shaft portions 37A and 39 which are provided on the upper and lower connecting members 38 of the rotating body which is the other of the side plate portion 3 and the rotating body 31 and which are cam opening / closing cam engaging portions.
Since it has the mold opening / closing cam grooves 36, 36 with which A engages, it has the same operation and effect as the first embodiment.

FIG. 7 shows a third embodiment of the present invention. The same parts as those in the above embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted. This is an example in which the pin-shaped elevating cam engaging portion 33 is provided on the inner surface, and the elevating cam groove 34 is provided on the outer periphery of the elevating rod 9.
When the elevating body 31 rotates, the elevating rod 9 moves up and down by the engagement between the cam engaging portion 33 and the cam groove 34, and the core 5 moves up and down. In this case, the rotating body 31 is rotated to one side, the core 5 is lowered in a state where the cam engaging portion 33 is located at the inclined portion 34A, and the rotating body is rotated to the other side indicated by an arrow to rotate the cam. When the engaging portion 33 is located at the horizontal portion 34A, the core 5 rises, and accordingly, the side plate opening / closing mechanism 45 opens the mold when the rotating body 31 is rotated to one side and rotates to the other side. It is designed to close the mold sometimes.

It should be noted that the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention. For example, in the embodiment, an example is shown in which two pairs of the elevating cam engaging portions and the elevating cam grooves are used, but three pairs or more may be used. Also, at least one pair of the mold opening / closing cam engaging portion and the mold opening / closing cam groove may be provided in accordance with the number of side plate portions. In the case of a mold having two side plate portions, at least one pair of mold opening / closing And a cam groove for opening and closing the mold may be provided. Further, the means for supporting the moving side plate can be appropriately selected. Further, the shape of the core can be appropriately selected. Furthermore, the elevating member only has to be in the elevating direction near the rotating body. Further, as the cam engaging portion, various members can be used as long as the cam engaging portion engages with the cam groove, such as a pin or a roller. The cam groove may be formed by a concave portion.

[0022]

According to the first aspect of the present invention, there is provided a mold opening / closing apparatus for a concrete form having a side plate portion and a core disposed in the side plate portion, wherein the lifting member connected to the core, and the lifting member A core elevating mechanism for elevating and lowering the core, and a side plate part opening / closing mechanism for opening the side plate part outward in conjunction with the core elevating operation of the core elevating mechanism, A side plate portion opening / closing mechanism is provided for engaging the upper and lower sides of the side plate portion, and provides a concrete form opening / closing device capable of easily performing mold opening and closing operations in a mold having a core. Can be.

According to a second aspect of the present invention, the elevating member is connected to the core so as to be movable up and down, so that the mold opening and closing operations can be easily performed in a mold having the core. It is possible to provide a concrete form opening and closing device that can be used.

Further, the invention according to claim 3 is characterized in that the core elevating mechanism includes the elevating member provided along the elevating direction,
A rotating body rotatably provided on the elevating member, a cam engaging portion for elevating provided on one of the elevating member and the rotating body, and a rotating member provided on the other of the elevating member and the rotating body. A lifting / lowering cam groove with which the lifting / lowering cam engaging portion engages, wherein the side plate portion type opening / closing mechanism is provided with a die opening / closing cam member provided above and below any one of the side plate portion and the rotating body. A mold frame provided with a joint portion, and a mold opening / closing cam groove provided on the upper and lower sides of the side plate portion and the other of the rotating body and engaged with the mold opening / closing cam engaging portion, and having a core. Thus, it is possible to provide a concrete form opening / closing device capable of easily performing mold opening and mold closing operations.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a mold showing a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view around a core lifting mechanism showing the first embodiment of the present invention.

FIG. 3 is a plan view of a mold showing the first embodiment of the present invention.

FIG. 4 is a sectional view taken along line AA of FIG. 1 showing the first embodiment of the present invention.

FIG. 5 is an explanatory plan view showing the first embodiment of the present invention and illustrating operations of a rotating body, a mold opening / closing cam groove, and a mold opening / closing cam engaging portion shown in cross section.

FIG. 6 is a sectional view of an upper part of a mold showing a second embodiment of the present invention.

FIG. 7 is a sectional view of a rotating body according to a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Formwork 3 Side plate part 5 Core 9 Elevating rod (elevating member) 31 Rotating body 33 Elevating cam engaging part 34 Elevating cam groove 35 Rotating arm (rotating body) 38 Vertical connecting member (rotating body) 37A, 39A shaft Part (cam engaging part for mold opening / closing) 36 cam groove for mold opening / closing 44 core lifting mechanism 45 side plate mold opening / closing mechanism

Claims (3)

[Claims] 1. A concrete mold opening / closing apparatus having a side plate portion and a core disposed in the side plate portion, wherein a lifting member connected to the core, and the lifting member is moved up and down by the core. A core raising / lowering mechanism for raising and lowering the core, and a side plate part type opening / closing mechanism for opening the side plate part outward in conjunction with the core lifting / lowering operation of the core lifting / lowering mechanism. A mold opening / closing device for a concrete formwork, wherein the opening / closing device is engaged with upper and lower portions of a part. 2. The concrete mold opening and closing device according to claim 1, wherein the lifting member is vertically connected to the core. 3. The core elevating mechanism, wherein the elevating member provided along the elevating direction, a rotating body rotatably provided on the elevating member, and one of the elevating member and the rotating body. A lifting / lowering cam engaging portion provided on one side, and a lifting / lowering cam groove provided on the other of the lifting / lowering member and the rotating body and engaging with the lifting / lowering cam engaging portion; A mold opening / closing cam engaging portion provided above and below one of the side plate portion and the rotating body; and a mold opening / closing cam engaging portion provided above and below the other of the side plate portion and the rotating body. The mold opening / closing device for a concrete formwork according to claim 1 or 2, further comprising a mold opening / closing cam groove with which the joining portion engages.