JP3352807B2 - Formwork for manufacturing hollow block with step for lifting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold for manufacturing a hollow block with a step for raising and lowering which is useful for shortening the manufacturing time and labor-saving production of a hollow body block with a step for raising and lowering.

[0002]

2. Description of the Related Art Referring to FIG. 9, there is described a hollow block B1, B2 which is manufactured by a prior art hollow block manufacturing form and which is retrofitted with an elevating step. With reference to FIG. 10 and FIG. 11, a prior art mold KA for manufacturing a hollow body block and a prior art mold KA ′ for manufacturing a hollow body block with a step for lifting and lowering will be described.

FIG. 9 is a perspective view of a hollow body block according to the prior art, which is shown in partial cross section. FIG. 9 (a) shows a conventional block used for maintenance and inspection of communication or power wiring of sewerage / underground burial. Elevating steps called manholes (hereinafter referred to as manholes)
Hollow body block B1 to which step ST is added later
Then, it is manufactured by a hollow body block manufacturing form KA (without using the insert 5a) shown in FIG. 10 which will be described later, and after the hollow body block B1 is manufactured, a step is performed from the inside of the opening 8 with a hammer drill or the like. There is a first prior art currently used in which a perforation hole 5 for mounting ST is formed, a step ST is inserted into the perforation hole 5, and resin and reinforced mortar are filled and fixed.

[0004] A hollow body block B2 to which a step for raising and lowering shown in Fig. 9 (b) is retrofitted is formed by a conventional hollow body block manufacturing form (hereinafter referred to as a form form KA) shown in Fig. 10 at the time of casting. Step ST: At the same time, a hole 5 for mounting is formed, and the same step is buried and fixed in a later step.
There is a second prior art in use.

Further, the notch fraction 3a of the core 3 of the mold KA of FIG. 10, step clamping wearing removable member 4 shown in FIG. 11
a, 4b, 4c, and 4d are detachably fixed to formwork K
According to A ', there is a third prior art which is currently used, in which a step ST is buried at the same time as the casting to manufacture a hollow block with a step for elevating.

The construction and operation of the conventional formwork KA, KA 'will be described below with reference to FIGS.

[0007] Fig. 10 is a perspective view of a mold for manufacturing a hollow body block according to the prior art, which is conventionally formed by pouring (injecting concrete) from the opening side of the hollow body block. It has been heavily used since . This formwork KA is used to simultaneously form the burial hole 5 for embedding the step ST when manufacturing the hollow body block B2, and has the expansion and contraction mechanism 2 such as a turnbuckle provided inside and a part of the outer periphery cut out. The core 3 is erected on the bottom portion 1 spread on the underframe 01, and a detachable portion 4 forming an outer periphery in the cutout portion 3a is detachably provided from the inside. A tapered pin-shaped insert 5a forming the installation hole 5 is fixedly provided, and an openable / closable side plate 6 is provided outside the core 3, and a flange portion 6f of the side plate 6 is provided.
The lid member 7 can be tightened with a bolt bo or a U-shaped clip cl. If the insert 5a is not used in the attaching / detaching portion 4, the hollow body block B1 is formed.

In the formwork KA having the above structure, a detachable portion 4 for simultaneously forming a perforation hole 5 for step embedding at the time of casting (when concrete is poured) is fixed to the widened core 3 by fixing. The core 3 is fixed on the bottom 1, the side plate 6 is closed, and the bottom 1 is closed.
The upper part of the side plate 6 and the driving part D between the core 3
After the concrete is cast and the cast portion D is ironed, the lid member 7 is bolted to the flange portion 6a of the side plate 6.
Tighten with the o or U-shaped clip cl to complete the casting process.

When the product is removed from the mold (when the product is taken out of the mold KA), first, after removing the lid member 7, an operator enters the core 3 and removes the detachable portion 4 from the mold. Next, the core 3 is contracted by operating the expansion / contraction mechanism 2 using a turnbuckle or the like of the core 3 and is taken out of the mold KA. The hollow body block B2 having the perforated hole 5 is removed.

In the first and second prior arts to which the above-mentioned step ST is added later, in order to reliably obtain the pull-out strength of step ST and to prevent an accident, it is necessary to remove residues and latencies in the perforated hole 5. There is a disadvantage that an indispensable and complicated process and a long time are required. Next, step S is performed using the mold KA.
A third prior art in which T is implanted at the same time as casting is described.

[0011] Figure 11 is a perspective view of a prior art step clamping wearing removable <br/> member of, the steps narrow wear detachable member 4a is divided illustrated in FIG. 11 (a), 4b, 4c , 4d , etc. Toro leakage prevention packing 4 is provided at each joint j and holding groove 4 m.
The p or the like is provided, each step clamping wearing detachable member 4a, 4b, 4
c, and elevating step ST allows sandwiched between 4d, the mold was fixed to the notch fraction 3a of the mold KA (see Figure 10) frame K
A ′.

[0012] In FIG. 11 (b) the mold KA applying the steps narrow wear detachable member shown schematically in ', the striking設時, first, notch tang 3 worker enters into the core 3 the bottom of the minute 3a step narrow wear detachable member 4a secured (screwed), embedded portion s of the step across the step ST in holding grooves 4m
The protruding outside the step clamping wearing detachable member 4a, the upper step S by fixing the upper portion of the step clamping wear detachable member 4b
The T mounted, are assembled mold KA 'and sandwiched step ST between successively secured to the step clamping wearing detachable member 4c, 4d by the same process.

When releasing the mold KA ', first, the cover member 7
After the off, step contains workers in core 3 sandwiched wearing detachable member 4a, 4b, 4c, and sequentially removed 4d core 3
The core 3 is reduced by operating the expansion / contraction mechanism 2 using a turnbuckle or the like of the core 3 and taken out of the mold KA ′, and the side plate 6 is opened right and left to complete the mold opening process. After that, the hollow body block with a step for elevating is removed from the mold.

[0014] The construction formwork applying the step clamping wearing removable member by KA 'is cumbersome steps clamping wearing detachable member 4a which enters the narrow core 3 at every pouring-demolding, 4
It involves dangerous work such as attaching / detaching process of b, 4c, 4d, etc. and expanding / contracting operation / carrying-out of core 3, and it takes about 30 minutes to assemble a formwork for casting by two workers and a mold for demolding. Approximately 20 for the opening process
I'm hanging on. In addition, in order to carry out and mount the core 3, equipment such as an overhead crane and a forklift and at least one operator are indispensable, and there is a drawback that a transport passage and a place for the core 3 are required.

The prior art mold KA and step nip wearing detachable member the applied mold KA 'is more because it has many of the disadvantages mentioned, the steps during manufacture of the draw resistance of the steps have been quality control can be ensured There has been a demand for a formwork that can be planted, save labor and shorten manufacturing time.

[0016] The applicant has investigated and found no mold for manufacturing a hollow block with a step for elevating and lowering which can be implanted at the time of setting a step without the need for a core removing / attaching step.

[0017]

The disadvantages of the conventional mold are eliminated, and the core is not required to be attached or detached, so that the mold can be easily removed and assembled. Provided is a mold for manufacturing a hollow body block with a step for raising and lowering, which can reduce the production time.

[0018]

In order to solve the above-mentioned problems, according to the present invention, there is provided a mold for manufacturing a hollow body block provided with an openable front and rear end plate, both side plates and an expandable and contractible core. A front bobbin 50 is provided on the frame 30 so that it can be turned upside down.
Are connected via interlocking means 55, and a core supporting beam 100 is projected in the horizontal direction from the rear end plate 60 or the rear end plate 60 side. A support frame 88 is fixed to a non-deformed portion of a core 80 composed of a vertically movable second core 90, the support frame 88 is loosely fitted to the core support beam 100, and a step holding portion made of an elastic body is provided on the upper portion. The second core 90 with the 99 inserted therein is provided so as to be able to move up and down via an elevating mechanism 120 for converting the rotational movement of the screw 110 into a vertical movement, and a mechanism for elevating between the second core 90 and the core body 80A. It is connected via an expansion / contraction mechanism 95 interlocked with 120 to form a mold for manufacturing a hollow body block with a step for lifting and lowering, in which the attachment and detachment of the core 80 is unnecessary.

According to the second aspect, between the core supporting beam 100 and the core main body 80A or the second core 90, there is provided a lifting means 130 for the core 80, which is interlocked with the lifting mechanism 120 for the second core 90. 2. The mold for manufacturing a hollow block with a step for elevating and lowering according to claim 1, wherein the core 80 is provided so as to be able to ascend when the child 80 is reduced.

[0020]

According to the first aspect of the present invention, at the time of driving, the lifting mechanism 1
When the second core 90 is raised to the home position by operating the core 20, the core body 80A and the second core 90 are brought into contact with each other to seal them, and the core 80 returns to a predetermined size . Next, a step is inserted into the step holding portion 99 of the second core 90 so as to be held (leaving the embedded portion), the both side plates 70 and 70 are closed, and the front end plate 50 is closed.
Cause the rear end plate 60 to move forward in conjunction therewith, the positioning holes ph of the front and rear end plates 50, 60 and the core 80, both side plates 7
If the 0, 70 positioning pins p are fitted and the form is tightened, it can be driven immediately, and the manufacturing time of the hollow body block in which the step ST is implanted can be shortened and labor can be saved. Next, the operation at the time of releasing the mold (when opening the mold for removing the product) will be described.

When the front end plate 50 is opened at the time of removal from the mold, the rear end plate 60 moves back and forth, and at the same time the both side plates 70, 70 can be opened. Next, the rotating head of the lifting mechanism 120 is rotated in a predetermined direction. Then, the second core 90 descends into the core body 80A, and the step inserted into the step holding portion 99 of the second core 90 remains in the hollow portion of the hollow body block,
If the lowering of the core 90 further proceeds , the expansion and contraction mechanism 9 is linked.
5 displaces both sides of the core body 80A to the inside of the core to reduce the core width, and the core 80 loosely fitted to the rear end plate 60 or the core supporting beam 100 protruding from the rear end plate 60 side. The mold can be immediately removed while being left in the mold, and the hollow body block having the step ST implanted on the inner surface of the hollow can be easily removed.

Further, even if the outer skin of the core 80 and the inner surface of the hollow portion come into contact with each other at the time of removal from the mold, the core 80 loosely fitted on the core support beam 100 has a direction in which the contact resistance is small (left, right, upward, forward). When the hollow body block is lifted by mistake and slightly exceeds the allowable range above the core 80, the rear end plate 60 is By tilting, the core supporting beam 100, the core 80, the rear end plate 60, and other parts of the mold frame are prevented from being damaged.

According to the second aspect, the core supporting beam 100 is provided.
Lifting mechanism 1 between the core body 80A and the second core 90.
Since the lifting means 130 of the core 80 linked with the core 20 is provided, when the core is reduced at the time of removing the core, the core is supported so as to avoid the contact between the inner surface of the hollow body block and the outer skin of the core 80 simultaneously with the reduction of the core. The core 80 as a whole is raised with respect to the beam 100, making it easier to remove the core, preventing wear and deformation of the core outer skin, and improving the durability of the mold. Also,
If the core 80 is widened by operating the elevating mechanism 120 at the time of casting, the core 80 that has been raised falls on the core support beam 100 and returns to the home position.

[0024]

1 to 7 show an embodiment of the present invention. FIG. 1 is a front view of a mold for manufacturing a hollow body block with a step for elevating, and FIG. 2 is a hollow body block with a step for elevating. FIG. 3 is a front view of the core, FIG.
FIG. 5 is a perspective view of a second core, FIG.
6 is an explanatory view of the operation of the core, FIG. 7 is an explanatory view of a lifting means according to claim 2, FIG. 8 is a perspective view of a hollow body block with a step for raising and lowering, and FIG. FIG. 10 is an explanatory view of a block for manufacturing a conventional hollow body block, and FIG. 11 is a perspective view of a step-clamping attaching / detaching portion of the conventional frame.

Although the order is not specified, the hollow block with the step for raising and lowering manufactured by the present invention will be described . FIG. 8 is a perspective view of a hollow body block with a step for lifting and lowering, which is shown in a partial cross-sectional view . FIG. 8 (a) shows a hollow block BA with a round cross-section for ascending and descending steps (usually referred to as a manhole). In the frame ST, the buried portion s of the step ST is buried at the same time as the laying. In the figure, the hollow block with step for raising and lowering indicated by the two-dot chain line BA2 is one with a slope on one side and a large diameter at the lower part, without departing from the idea of the present invention,
If the shape of the core, side plate, etc. of the formwork KS is changed, manufacturing becomes possible, and the form is removed in the direction of the arrow Dk (in front of the formwork).

FIG. 8 (b) shows a hollow block BB having a rectangular cross section with a step for elevating and lowering, in which the core, side plates and the like of the form KS of the present invention are implemented corresponding to the rectangular cross section, and are similarly cast. The embedding part s of the step ST is buried at the same time as the casting, and both are buried at the same time.
a is sucked by the vacuum pad of the casting machine, and the core that has been reduced is pulled out toward the front Dk side of the formwork KS while leaving the reduced core in the formwork KS.

The configuration and operation of the present invention will be described below with reference to FIGS.

FIG. 1 is a front view of a form for manufacturing a hollow body block with a step for raising and lowering. The front end plate 50 is partially broken, and the core 80 and the side plate 7 whose width is widened by the operation of the raising and lowering mechanism 120 are shown.
0 (two-dot chain line 70 ′ is an open side plate) and the like are shown in an assembled state (during casting). FIG. 2 is a side view of a mold for manufacturing a hollow body block with a step for elevating and lowering. 60 and side plate 7
0 and the core 80 are shown partially broken,
Is tightened by the tightening bolt BL, the core 80 is widened by the elevating mechanism 120, the step ST is inserted into the step holding portion 99 provided on the raised second core 90 , and the step ST protrudes from the rear end plate 60. The inside of the core 80 supported by the core support beam 100 via the support frame 88 and the like are shown in an assembled state (at the time of driving) as in the previous figure. Hereinafter, a schematic configuration of the present invention will be described with reference to both drawings.

The mold KS shown in FIG. 1 and FIG.
On the front portion of the underframe 30 on which the front panel 30 is spread, the front end plate 50 is hinged so as to be able to be turned upside down, and both side plates 70, 70 are also hinged so as to be able to be turned upside down, and are guided to both sides of the back of the underframe 30. A rail 33 is provided, a front wheel 67 is provided in the front of the guide rail 33, and a front inclination preventing piece 68 (preventing the front end plate from tilting) is provided on the rear upper surface, and a connecting shaft 61 is provided at the rear end. The pivoting portion 66 is inserted so as to be able to move back and forth, and the rear end plate 60 is pivotally attached to the connecting shaft 61 so as to be tiltable rearward (as indicated by a two-dot chain line 60 ').
A core support beam 100 for supporting the core 80 is protruded inside the 0, and a spring sp is provided on a hinged portion of the front end plate 50 to bias the weight reduction when the front end plate 50 is lowered. are doing. Next, the interlocking mechanism 55 provided between the front and rear end plates 50 and 60 will be described.

An interlocking mechanism 55 shown in the lower part of FIG. 2 has an interlocking arm 54 projecting below the front end plate 50, and an interlocking rod 57 having a length adjusting portion 56 connected to the interlocking arm 54. Rod 57
The rear end elongated hole portion 58 is connected to the connecting shaft 61 of the rolling support portion 66 so as to be configured.

Further, a core 8 comprising a core body 80A which can be expanded and contracted and a second core 90 which can be moved up and down by an elevating mechanism 120 is provided on the core support beam 100 protruding inside the rear end plate 60.
0 (to be described in detail later) through the support frame 88, and a fastening bolt BL is provided between the front and rear end plates 50, 60.
A sharp positioning pin p is protruded from the end of each of the side plates 70 and 70, and a positioning hole ph is provided at a position facing the front and rear end plates 50 and 60. It is configured to keep the proper position and dimensions of Next, core 80
Will be described.

FIG. 3 is a front view of the core and is shown in partial cross section . FIG. 4 is a perspective view of the second core, in which the core body 80A is omitted and the step holding portion 99 is enlarged in the upper part of the figure, and the lower part of the figure shows the mounted state of the core 80 to the mold. . FIG. 5 is an explanatory diagram of the step holding section. Hereinafter, the configuration of the core 80 will be described with reference to FIGS. 3 and 4, and the step holding portion 99 will be described with reference to FIG.

The core 80 shown in FIGS. 3 and 4 has a C-shaped core body 80A which is openable at the top and which can be expanded and contracted, and a kamaboko-shaped cross section which can be raised and lowered by the lifting mechanism 120 in the core body 80A. The core body 80A is made of an elastic steel plate or the like, and a reinforcing rib L
1 and reinforcing ribs L2 on the left and right inner surfaces across the flexible portion 81.
A separation portion 83 is provided on both sides of the upper portion so as to be in contact with the contact portion 93 of the second core 90 when the core is widened and sealed, and to separate when the core is reduced by lowering the second core 90. A vertical sliding groove 86 having a vertical stroke SL of the vertical moving mechanism 120 to be described later is provided inside the upper portion of the reinforcing rib L2 provided on both inner surfaces.
(A part of the expansion / contraction mechanism 95) is bent or bent outward from near the end point, and the core support beam 100 is provided on the reinforcing rib L1 with a gap g left / right / up / front. The support frame 88 to be fitted is fixedly attached to the core frame 80A. Next, the lifting mechanism 120 of the second core 90 will be described.

The lifting mechanism 120 shown in FIGS. 3 and 4 has a right-hand thread 110R threaded on the front half of a threaded rod 110 having a rotating head 111 at the tip, and a left-hand thread 110L on the second half. Then, a rectangular parallelepiped nut RN is screwed into the right screw portion 110R,
Similarly, a rectangular parallelepiped nut LN is screwed into the left screw portion 110L, and an appropriate portion of the screw rod 110 is mounted on the bearing portion 121 serving as a mounting base.
To be rotatably supported and fixed on the support frame 88,
Both nuts RN and LN slidably provided on the upper surface of the support frame 88
Link 12 provided with a shaft mounting hole 124c at the middle point at both ends of
4 is attached to the lower end of the second core 90 and the upper end of the long link 124 is connected to both ends of the bearing 121.
The lower end of the short link 122 having a length of 1/2 is axially mounted, and the upper end of the short link 122 is axially connected to the shaft mounting hole 12 at the midpoint of the long link 124.
4c, and the upper end of the long link 124 is attached to the second core 9
0, so that the second core 90 can be moved up and down. Next, the second core will be described.

The second core 90 is provided with a concave portion 94 for accommodating a step holding portion 99 made of an elastic material for holding the step ST at a required upper portion, and the step holding portion 9 is provided in the concave portion 94.
9 is provided by being fixedly or removably inserted therein, and provided on both sides with a contact portion 93 which comes into contact with and seals the separation portion 83 of the core body 80A when the core is widened.
a, and a sliding shaft 95b is attached to an end of the expansion / contraction arm 95a.
The sliding shaft 95b protrudes in a horizontal direction parallel to the screw rod 110.
Are provided in the reinforcing rib L2 of the core body 80A.
6 slidably inserted into the core 6, and constitutes an expansion / contraction mechanism 95 that expands / contracts the core body 80 </ b> A in conjunction with the elevating movement of the elevating mechanism 120. The lifting means 130 (see FIG. 4) protruding from the four corners of the back surface of the second core 90 is a first embodiment of the lifting means according to claim 2 described later. Next, another enlargement / reduction mechanism 95 ′ shown in the lower part of FIG. 3 will be described.

An expansion / contraction mechanism 95 'shown in the lower part of FIG. 3 is another embodiment of the expansion / contraction mechanism 95, in which an expansion / contraction hinge 95c is protruded below the second core 90, and the expansion / contraction hinge 95 is provided.
c and the reinforcing rib L2 of the core body are connected by a link 96 having a long hole 96L at the end. In this figure, the core body 80A 'having a square cross section is shown, but it is of course applicable to the core 80 having a round cross section. Next, the mounting state of the core 80 on the mold will be described with reference to the lower part of FIG.

FIG. 4 is a view showing a state in which the core 80 having the lifting mechanism 120 installed therein is mounted on a mold.
The support frame 88 having the gap g is loosely inserted into the core support beam 100 horizontally protruding from the rear end plate 60 indicated by the two-dot chain line to support the core 80 . Also, the core supporting beam 10
Numeral 0 may be a core supporting beam 100 ′ extending from the underframe 30 and protruding through the rear end plate 60 so as to be able to slip through as shown by a thick chain line in the figure. Next, the step holding section 9
9 will be described.

[0038] FIG. 5 is an explanatory view of the step clamping portion, stearyl
The nip portion is made of an elastic material such as rubber, urethane resin, or silicone resin, and the step nip portion 99 shown in FIG. 5A has a lip shape capable of inserting and sealing the step ST on the upper surface. A cut-out lip portion 99L is provided, a cavity portion 98 in which the step ST is slidably inserted and removed is provided, and slits 97 (cut-out portions) are provided on both sides except a bottom portion. The step ST is configured to be press-fittable while leaving the buried portion s, and the concave portion 94 of the second core 90 is formed.
(See FIG. 4).

If the step holding portion 99 having the above structure is inserted by inserting the step ST from the lip portion 99L on the upper surface of the step holding portion 99 at the time of driving, as shown in the right figure, the second core 90 can be removed at the time of removing the mold. Is lowered and the core body 80A is reduced, the hollow body block BA (or BA2, BB)
Etc.), the hollow block can be easily removed from the step holding portion 99 while the embedded portion s is embedded.

The step holding portion 99 'shown in FIG.
Is provided with a hollow portion 98 capable of press-fitting and housing the step ST while leaving the buried portion s from the upper surface portion, and the step ST in which the sealable insert 98b is inserted between both legs in the step ST is performed. And used by being fixedly or removably inserted into the concave portion 94 of the second core 90.

The step holding portion 99 ′ having the above structure is
At the time of casting, insert the nest 98b between both legs in step ST,
If the step ST is inserted into the hollow part 98 of the step holding part 99, as shown in the right figure, when the second core 90 descends and the core body 80A is reduced at the time of removal from the mold, the step ST becomes a hollow body. The buried portion s is buried in the block BA (or BA2, BB, etc.), and the insert 98b is pulled out of the step holding portion 99 'while being held between both legs of the step, and the hollow body block is easily removed from the block. Can be. In addition, nesting 98
b may be collected and used next time, or it may be made of styrofoam or the like and thrown away.

The step holding section 9 shown in FIG.
9 "is provided with a hollow portion 98 ' for accommodating the step ST therein, slits 97 (cut-out portions) provided on the upper surface and both side surfaces except for the bottom portion, and the upper slit is opened in a V-shape. Can be inserted, and step ST
Is inserted into the recess 94 of the second core 90 having a draft 94s with a detachment therebetween, and used. Note that V
It is also possible to <br/> closing step clamping portion a slit 97 is in close contact at the concave portion 94 inserted open mold.

The step holding section 99 ″ having the above structure is
If the step ST is inserted by opening the upper surface of the step holding portion 99 ″ at the time of driving, and the step ST is inserted into the concave portion 94, the second core 90 descends and the core body 80 A at the time of removal from the mold as shown in the right figure. Is reduced, the hollow body block BA (or BA2,
The step ST in which the embedded portion s is embedded in the BB or the like can be pulled out from the concave portion 94 together with the step holding portion 99 ", and the hollow body block can be easily removed from the step ST. The step holding portion 99" is recovered. I will use it next time.

FIG. 6 is a view for explaining the operation of the core. After the operation of the core 80 is described with reference to FIG. 6, the operation of the entire formwork KS of the present invention will be described.

FIG. 6 is a view showing a state in which the core 80 shown in FIGS. 3 to 5 is reduced. When the rotating head 111 of the elevating mechanism 120 is rotated counterclockwise, the nut screwed onto the threaded rod 110 is turned on. R
N and the nut LN approach each other, the distal end of the long link 124 descends, lowers the connected second core 90, and makes contact with the contact portion 83 of the core body 80A that has been contacted and sealed. Core 9
When the second core 90 further descends when the separation part 93 of the zero is separated, the flexible part 81 of the core body 80A is expanded and contracted by the expansion and contraction mechanism 95.
Is bent to reduce the original proper size 80a of the core 80 to 80b, and the step ST inserted in the step holding portion 99 is buried in the hollow body block by the lowering of the second core 90. As shown by the chain line ST while s is buried, it can be immediately removed. Also, if the lifting mechanism 120 is reversely operated at the time of driving, the core 80 widens as the second core 90 rises, and widens to the appropriate dimension 80a shown in FIG.

The lowering mechanism 95 'shown in the lower part of FIG. 6 is an explanatory view of the operation of the lowering mechanism 95' shown in the lower part of FIG. 3. When the second core 90 is lowered, it is connected to the expanding hinge 95c. The step ST inserted into the step holding portion 99 is pulled down by the link 96 that has been drawn, and the step ST inserted into the step holding portion 99 is buried in the hollow body block as shown by a chain line ST as in the case of the expansion / contraction mechanism 95. It can be pulled out and removed immediately. Also, if the lifting mechanism 120 is reversely operated at the time of driving, the core 80 widens as the second core 90 rises, and widens to the appropriate dimension 80a 'shown in FIG.

Since the core 80 operates as described above, the mold KS (see FIG. 2) loosens the turning head of the tightening bolt BL at the time of removal from the mold, and moves the front part as shown by a two-dot chain line. When the end plate 50 is opened, the interlocking rod 57 connected to the interlock arm 54 below the front end plate 60 pushes the connecting shaft 61 of the rear end plate 60, and the rear end plate 60 that has been rolled back is retracted while standing upright. 6
The sharpened positioning pins p of the core 80 and both side plates 70 and 70, which have been fitted in the positioning holes ph provided in the center plate 0, are opened,
The core 80 can be reduced, and both side plates 70 can be opened.

Next, the elevating mechanism 120 provided inside the core 80
Is rotated left, the second core 90 descends and the core body 80A
Is reduced and the contact surface with the hollow body block peels off,
If the hollow body block is slightly lifted and pulled forward, the elevating step ST is performed while the core 80 remains in the formwork KS.
Can be easily removed in a short time. The core 80 is loosely fitted to the core support beam 100 with the left, right, upward, and forward gaps g as described above, and the rear end plate 60 is provided so as to be tiltable rearward with respect to the rolling support 66. When the mold is removed, the core 80 loosely fitted to the core support beam 100 naturally moves in the direction of low contact resistance (left, right, upward, forward) to reduce wear of the core outer skin and prevent deformation. At the same time, when the hollow body block is lifted by the demolding machine, the core support beam 100 may slightly exceed the allowable range above the core 80 (the play dimension between the core support beam 100 and the support frame 88). -Damage (deformation) of each part of the mold such as the core 80 and the rear end plate 60 can be prevented.

FIG. 7 is an explanatory view of the lifting means according to the second aspect . Raising means has been shown already the first embodiment in the perspective view of FIG. 4 supra, the diagram shown in FIG. 7 (a), first embodiment of the raising means provided on the lower surface four corners of the second core 90 and example 130, shows the constitution of the second embodiment 130 'provided in the core supporting beam 100, in the first embodiment 130, the rising rod 131 to the lower surface 4 corners of the second core 90 and vertically, An adjusting portion 132 (for adjusting the height of the ascending) is screwed into the tip of the ascending rod 131, and a sneaking hole 133 is formed in the support frame 88 at a position facing the adjusting portion 132.

The operation of the first embodiment 130 of the lifting means will be described with reference to FIG . Elevating mechanism 1 when core 80 expands / contracts
If the second core 90 is moved down by operating the support 20, the support frame 88
The tip of the ascending rod 131 sneaked into the infiltration hole 133 presses the upper surface of the core support beam 100, and the core 80
The whole is raised by the rising dimension indicated by the reference character U, and the two-dot chain line 80
The hollow part shown in a (core size before reduction) and the reduced core 8
A gap G is formed between 0b.

FIG. 7 (a) shows a second embodiment 130 ' of the lifting means according to the second aspect, which is indicated by a dashed line, and is provided on both side surfaces of the core supporting beam 100 loosely inserted into the supporting frame 88. An engaging member 135 provided with a slope 134 on the upper surface is protruded, and the slope 134 of the engagement member 135 is provided at a position facing the core body 80A.
A sliding member 136 that can be slidably contacted is fixedly configured.

If the second embodiment 130 ' of the lifting means is constructed as described above, if the second core 90 descends most by the operation of the lifting mechanism 120, two points will be obtained at the time of widening as shown in FIG. The core, which was the chain line 80a, is reduced to 80b, and the sliding member 136 slides on the inclined surface 134 of the engaging member 135 provided on the core supporting beam 100, so that the core 80 Like the first embodiment, the whole can be raised by the dimension indicated by reference symbol U ′.
A gap G is formed between the hollow portion and the core 80 indicated by the two-dot chain line 80a.

Embodiments 130 and 1 of the above-described lifting means
30 ′ is provided between the core support beam 100 and the core main body 80A or the second core 90 with the lifting means 130 or the lifting means 130 ′ of the core 80 interlocked with the lifting mechanism 120, so that when the mold is removed, When the core 80 is reduced, the core 80 as a whole rises with respect to the core support beam 100 at the same time as the core reduction, and a gap G is formed between the inner surface of the hollow body block and the core 80, so that demolding is easier. In addition, it is possible to prevent wear and deformation of the core shell and to improve the durability of the formwork KS. When the elevating mechanism 120 is operated to widen the core 80 at the time of driving, the raised core 80 descends on the core support beam 100 and returns to the home position.

[0054]

According to the formwork KS of the present invention, when the second core 90 is raised to a fixed position by operating the elevating mechanism 120 at the time of driving, the core body 80A and the second core 90 come into contact with each other. At the same time, the core 80 is widened to an appropriate size while being sealed.
When the front bobbin 50 and the front bobbin 50 are closed, the rear bobbin 60 advances in conjunction with each other, and the front and rear bobbin plates 50, 60, the core 80, and both side plates 7
When the mold is positioned at 0, 70, etc., the form can be installed immediately if the form is tightened, and the work of assembling the form, including the step insertion, can be completed within 5 minutes by two light-duty workers, reducing the time. This has the effect of saving labor.

When the front end plate 50 is opened at the time of removal from the mold, the rear end plate 60 moves back and forth, and at the same time, both side plates 70, 70 can be opened. Next, when the lifting mechanism 120 is operated, the step holding portion 99 The inserted step ST is extracted into the hollow portion of the hollow body block, and the hollow body block in which the steps are implanted is removed from the mold while leaving the core 80 loosely fitted on the core support beam 100 in the mold. The mold opening process can be completed in about 3 minutes by two light-working workers, which can be easily removed to the front, which has the effect of reducing time and labor.

Also, even if the outer skin of the core 80 and the inner surface of the hollow portion are in contact with each other at the time of removal from the mold, the core 80 loosely fitted on the core support beam 100 has a direction in which the contact resistance is small (left, right, upward, forward). The hollow body block in which the step ST for elevating and lowering is implanted in a short time while the core 80 remains in the formwork KS while moving naturally and preventing the wear and deformation of the core outer skin. In addition, even when the hollow body block is erroneously lifted slightly above the allowable range above the core 80,
Since the rear base plate 60 is tilted backward, there is an effect of preventing damage to each part such as the core support beam 100, the core 80, and the rear base plate 60.

According to the second embodiment, the core supporting beam 100 is provided.
Lifting mechanism 1 between the core body 80A and the second core 90.
Since the lifting means 130 for the core 80 interlocking with the core 20 is provided, when the core 80 is reduced at the time of removal from the mold, the core is supported so as to avoid contact between the core 80 and the inner surface of the hollow body block simultaneously with the reduction of the core. The core 80 as a whole rises with respect to the beam 100, which makes it easier to remove the core, prevents wear and deformation of the core outer skin, and improves the durability of the mold.

[Brief description of the drawings]

FIG. 1 is a front view of a mold for manufacturing a hollow body block with a step for lifting and lowering.

FIG. 2 is a side view of a mold for manufacturing a hollow body block with a step for lifting and lowering.

FIG. 3 is a front view of a core.

FIG. 4 is a perspective view of a second core.

FIG. 5 is an explanatory view of a step holding section.

FIG. 6 is an explanatory diagram of the operation of the core.

FIG. 7 is an explanatory view of a lifting means according to claim 2;

FIG. 8 is a perspective view of a hollow body block with a step for elevating.

FIG. 9 is a perspective view of a conventional hollow body block.

FIG. 10 is a perspective view of a mold for manufacturing a hollow body block according to the prior art.

FIG. 11 is a perspective view of a detachable portion for step clamping according to the related art.

[Explanation of symbols]

 g-Gap KS-Form of the present invention s-Buried part SL-Stroke (of lifting mechanism) ST-Step U-Up dimension (of core) 30-Underframe 50-Front end plate 55-Interlocking mechanism 60-Rear end plate 70- Side plate 80-core 80A-core body 81-flexible part 83-separation part 90-second core 93-contact part 95,95'-expansion / reduction mechanism 99,99 ', 99 "-step clamping part 100-in Child support beam 110-screw rod 120-lifting mechanism 130-first embodiment of lifting means 130 '-second embodiment of lifting means

Claims (2)

(57) [Claims] In a mold for manufacturing a hollow body block provided with front and rear end plates which can be freely opened and closed, both side plates and an expandable and contractible core, a front end plate 50 is provided on a base frame 30 so as to be capable of being turned upside down. The rear end plate 50 and the rear rear end plate 60 rotatably supported to be able to move back and forth are connected via the interlocking means 55, and the core support beam 100 is projected horizontally from the rear end plate 60 or the rear end plate 60 side,
A support frame 88 is fixed to a non-deformed portion of a core 80 including a core body 80A that can be expanded and contracted and a second core 90 that can be moved up and down in the core body 80A, and the support frame 88 is attached to the core. The second core 90, which is loosely fitted on the support beam 100 and has a step holding portion 99 made of an elastic body inserted in the upper portion thereof, can be moved up and down via an elevating mechanism 120 for converting the turning movement of the screw 110 into a vertical movement. Along with the provision, the second core 90 and the core main body 80A are connected via an expansion / contraction mechanism 95 interlocked with the elevating mechanism 120,
A mold for manufacturing a hollow body block with a step for elevating and lowering, wherein detachment of the core 80 is unnecessary. 2. A core 8 interlocked with a lifting mechanism 120 between a core support beam 100 and a core body 80A or a second core 90.
0 ascending means 130 is provided, and the core 80 is
The mold for manufacturing a hollow body block with a step for raising and lowering according to claim 1, wherein the frame is provided so as to be liftable.