JPH02273204A - Mold frame structure capable of readily opening and closing mirror board - Google Patents

Abstract

PURPOSE:To enable a mirror board to open and close smoothly and safely through a slight opening and closing force by making the mirror board a structure capable of opening and closing in front and rear direction about the vertical axis of a vertical pivot, and bearing the whole weight of the mirror board on the vertical pivot for throughout opening and closing actuation. CONSTITUTION:A mirror board 17 is provided with a core through hole (b) having a shape equal to the outer shape of a core 11 on the central part of a mirror board main body (a) comprising a board material having a trapezoid shape. And, the mirror board main body (a) is attached integrally with a revolving bracket (c) at the lower end of the one side part a-1, and the revolving bracket (c) is pivotally connected to the one side of a bottom board supporting frame (d) by means of a vertical pivot (e). Thereby, the mirror board main body (a) can be revolved rotatably about the vertical axis of the vertical pivot (e). And, since the whole weight of the mirror board main body (a) is supported by the vertical pivot (e), the mirror board 17 can be opened and closed readily and smoothly in front and rear direction through a slight rotating force.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention provides a formwork structure that allows easy removal of formed concrete products in a manufacturing machine for manufacturing cylindrical concrete products such as underdrains. Regarding.

(B) Conventional technology To briefly explain the conventional manufacturing method of cylindrical concrete products such as underdrains, first, concrete material is poured into the concrete product forming space formed between the outer frame and the core. After molding and curing for a certain period of time, the concrete product is removed from the mold, then the formwork is reassembled, concrete material is poured in, and the above manufacturing process is repeated.

As one form of the formwork structure used in this manufacturing method, the outer frame includes a long bottom plate and a pair of left and right sides whose base ends are pivoted to both sides of the bottom plate and can swing in the left and right width directions. Some devices are constructed of a side plate and a mirror plate disposed at both ends of the bottom plate, the lower end of which can be opened and closed in the front and rear directions by means of a horizontal pivot.

Further, with this configuration, it is believed that demolding work for concrete products from the formwork structure can be easily performed by tilting the left and right side plates laterally and by tilting both mirror plates in the front and back direction.

(c) Problems to be Solved by the Invention However, such formwork structures still have the following problems to be solved.

■In order to smoothly demold the concrete product, it is desirable to collapse the entire head plate, but in this case, since the head plate is made of thick steel plate, it is quite heavy and requires opening and closing work, especially closing work. Opening and closing requires a great deal of labor and is extremely dangerous.

■In addition, in order to improve the workability and safety of the above-mentioned opening/closing work, some models have the mirror plate tilted only at a certain angle.
In this case, it is not possible to smoothly demold the concrete product.

An object of the present invention is to provide a formwork structure that can solve the above problems.

(d) Means for Solving the Problems The present invention provides a formwork structure in which a core is built into an outer frame body, head plates are attached to both ends of the outer frame body, and a concrete product forming space is formed inside. , a corresponding one side of the end plate is connected to one side of the end surface of the outer frame body by a vertical pivot, and the end plate is configured to be able to be opened and closed in the front and rear directions around the vertical axis of the vertical pivot. This feature relates to a formwork structure that allows the mirror plate to be easily opened and closed.

(Illustrated) Actions and Effects With the above configuration, the present invention has the following actions and effects.

■Since the head plate can be opened and closed in the front and back directions around the vertical axis of the vertical axis, the entire weight of the head plate can be carried on the vertical axis throughout the entire opening and closing operation, and the head plate can be moved smoothly and easily with a small opening and closing force. Can be opened and closed safely.

(2) Since the above-mentioned vertical pivot is provided on one side of the outer frame, the end plate can be fully opened, making it easy to demold the concrete product.

(f) Examples The present invention will now be explained in detail based on examples shown in the accompanying drawings.

First, with reference to FIGS. 1 to 5, the configuration of a mold with a core 10 constituting the mold structure according to the present invention will be described.

As illustrated, the core-equipped formwork 10 includes an outer frame body 12 and a core 11 disposed inside the outer frame body 12.

As is clear from FIGS. 1 and 4, the outer frame 12 has a bottom Vi13 made of a long rectangular plate and an open bottom +ff.
The left and right side plates 14 are connected in a perpendicular direction from both sides of 13.
．． 15, and a pair of mirror plates 16 connected to both ends of a frame with an opening at the upper end formed from the bottom plate 13 and left and right side plates 14 and 15.
．． It consists of 17.

On the other hand, the core 11 is shown as a long cylindrical body inserted concentrically into the outer frame 12.

Further, a concrete product forming space S is formed between the outer frame body 12 and the core 11, and a product after forming and curing is formed within the forming space S.

In addition, on the back surface of the bottom plate 13, as shown in FIG. 4, there are sliding bodies 18 and 19 made of a pair of square steel pieces spaced apart in a direction perpendicular to the axial direction of the formwork with core 10. It is permanently installed.

Then, as shown in FIG. 8, the sliding bodies 18 and 19 are
Rolling wheels 21, 22.23.2 provided on the top surface of the base 20
By fitting into the ■-shaped circumferential groove of 4, formwork 1 with core is formed.
0 can be supported movably.

Also, as is clear from Fig. 1, the left and right side plates are 14°15°.
connects its base end to the corresponding side edges 13a and 13b of the bottom plate 13.
It is pivotally supported by pivots 25 and 26 on the left and right outward directions,
That is, it can swing in the width direction, making it easy to take out the concrete product from the concrete product forming space S.

The present invention provides, in the structure of the core-equipped formwork IO having the above-mentioned basic configuration, a head plate mounting structure that allows concrete products to be easily and safely removed from the core-equipped formwork 10 including the outer frame body 12. It is characterized by

That is, as shown in FIG.
The end plate 17 (described below with reference to the end plate 17) is provided with a core insertion hole having the same outer shape as the core 11 in the center of the end plate main body a made of a plate material having a trapezoidal shape.

The end plate main body a has a swing bracket C integrally attached to the lower end of the side part a-1 thereof, and the swing bracket C is attached to the bottom plate support frame d with a vertical pivot at one end. It is pivotally connected by e.

With this configuration, the end plate main body a can be rotated freely around the vertical axis of the vertical axis C.

In the above-mentioned rotational operation, the entire weight of the end plate main body a is supported by the vertical axis e, so that the end plate 17 can be easily and smoothly opened and closed in the front-rear direction with a slight rotational force.

Therefore, the concrete product can be easily and safely demolded from the cored formwork IO.

The above-mentioned end plate 17 is also characterized by a configuration in which the end plate main body a can be firmly connected and fixed to the outer frame 12 when assembling the formwork.

That is, the mirror plate main body a is provided with tightening metal fittings on its left and right side walls and on its bottom wall, respectively.

Each of the tightening metal fittings consists of a bracket (h-1) attached to the end plate main body (a), a swinging rod (h-2) whose base end is pivoted to the same bracket (h-1) so as to be freely movable, and a swinging rod (h-2) that is movably supported on the same bracket (h-1). It consists of a cylindrical tightening pad h-3 screwed onto the rear end of h-2 so as to be movable in the axial direction by rotation.

On the other hand, end brackets 14a and 1 are provided at the ends of the left and right side plates 14.15 at positions corresponding to the above-mentioned tightening fittings.
5a and the center part of the bottom plate support frame d, there is a retainer 11h-4 that can detachably retain a swinging rod h-2 with a tightening metal fitting.
A swinging rod engaging piece h-5 is provided in a protruding manner.

On the other hand, as shown in FIG. 3, a pair of retaining wedge pieces h-6, h-7 are provided on both sides of the upper edge of the end plate 17, and these retaining wedge pieces h-6, h-7 is left and right side plate 14
．． It is possible to engage with the engagement grooves h-8 and h-9 provided on the upper edge of 15.

With this configuration, when assembling the formwork 10 with a core, the end plate 17 is rotated around the vertical axis of the vertical axis e,
After moving the end plate body a to the position where it can be assembled, remove the left and right side plates 1.
4. Raise 15 inward and move it to the position where it can be assembled in the same way, and insert the retaining wedge pieces h-6 and h-7 into the retaining grooves h-8 and h.
-9, and then (after swinging the swinging rod h-2 and engaging it in the engagement groove h-4 of the swinging rod engagement piece h-5, the cylindrical tightening member 7 By rotating h-3, the left and right side plates 1
4.15, the bottom plate 13, and the end plate 16.17 can be integrally connected to form the outer frame 12 having high rigidity.

Next, the structure of the core 11 according to this embodiment will be described in detail with reference to FIGS. 1, 6, and 7.

As shown in the figure, the core 11 has a lower half 1 having a rectangular cross section.
1a and an upper half 11b having a circular cross section, the lower half 11a has an opening at the center of the bottom, and the opening has a flexible core for expanding and contracting. rubber + f
f127 is installed.

By expanding and contracting the core expansion/contraction rubber temporary 27 using a core expansion/contraction mechanism B described later, the core 11 itself can also be expanded/contracted.

Further, the core 11 has reinforcing ribs 2B, 29 and 30 attached to the upper and left and right side portions of its internal circumferential surface, respectively, over its entire length.

In addition, the reinforcing ribs 29 and 30 provided on the left and right sides are provided with a pair of expansion and contraction claw engaging members on the lower surface thereof, symmetrically with respect to the center vertical line, as shown in FIGS. 6 and 7. 31.
32 is installed.

Each expansion/contraction claw engaging member 31, 32 has rising portions 31a, 32a formed inside thereof, and the rising portion 3+
In the space between a, 32a and the reinforcing rib 29.30,
Expansion/contraction claws 33 and 34 forming a core expansion/contraction mechanism B, which will be described later, are inserted and engaged.

Further, as shown in FIGS. 6 and 7, the core 11 has reinforcing plates 35 and 36 fixed to both end surfaces and a midway portion thereof, respectively, by welding or the like.

Further, the core 11 has a rubber retainer 37 made of an iron plate placed on the core expansion/contraction rubber plate 27 over its entire length.
The rubber pressing plate 37 has an inverted T-shape consisting of a horizontal portion 37a and a vertical portion 37b.

The temporary rubber presser 37 is used to give rigidity to the core expansion/contraction rubber 45.27 forming the bottom surface of the core 11 during molding.

Furthermore, as shown in FIG. 1, the core 11 has support fittings 38 and 39 attached to both ends thereof for supporting both sides of the rubber pressing plate 37, respectively.

The supporting metal fittings 38 and 39 cooperate with the above-mentioned rubber press plate 37 and a rubber press plate holder explained below, and are moved to the molding position shown in FIGS. 1 and 6 during the molding operation. , the core 11 can be held securely.

That is, in this embodiment, the rubber pressing plate holder is
As shown in FIGS. 1 and 5, both mirror plates 1 of the outer frame 12
6.17, and consists of a pivot 40 and a swinging lever 42 whose base end is rotatably attached to the pivot 40 and whose tip is equipped with a clamp bolt 41 for clamping both ends of the rubber presser plate 37. ing.

Next, a description will be given of a core detaching device A that can be used to easily detach the core 11 from the outer frame 12 in the formwork structure having the above configuration.

As shown in FIGS. 8 to 11, the core detachment device A essentially includes a core expansion/contraction mechanism B for detaching the core 11 from the mold frame 10 with a core, and a core expansion/contraction mechanism B. Insert B into core ll/jil! It consists of a core expansion/contraction mechanism moving mechanism C, which has a core expansion/contraction mechanism B mounted on its upper surface in order to remove the core.

First, the configuration of the core expander/retractor lateral movement mechanism C that mounts the core expander/retractor fIB will be described with reference to FIGS. 8 and 9.

As shown in FIGS. 8 and 9, the core expansion/contraction mechanism moving mechanism C is disposed in an example of a mold frame 10 with a core.

The core expansion/contraction mechanism moving mechanism C essentially includes a movable cart 51 that moves forward and backward on the base 20 toward the core-equipped formwork 10 by a drive device 50 such as a motor, and The elevator frame 53 is arranged and can be raised and lowered in the vertical direction by a drive device 52 such as a motor.

In the figure, reference numeral 54 denotes a lifting guide rod for the elevator frame 53 which is erected on the movable cart 5.

Next, the configuration of the core expansion/contraction mechanism B will be explained.
As shown in the drawings and FIG. 9, the base end of a long support plate 55 having substantially the same length as the core 11 is fixed to one end of the elevator frame 53 in a cantilevered manner.

The support plate 55, in the standby state,
Although it is located outside the core 11, it is inserted into the core 11 as the movable cart 5I moves.

The support plate 55 has an inverted T-shaped cross section that can ensure sufficient rigidity in order to minimize the amount of deflection at its tip.

Further, on the lower front surface of the support plate 55, as shown in FIGS. 7 and 8, a pair of long expansion/contraction plates 56 and 57 having a U-shaped cross section are arranged symmetrically from the center vertical line. The expansion and contraction plates 56 and 57 can be expanded and contracted in the width direction with respect to the central vertical line.

Each expansion/contraction plate 56, 57 has a long upper expansion/contraction horizontal plate 56a, 57a, a long bottom expansion/contraction horizontal plate 56b, 57b, and both expansion/contraction horizontal plates 56a, 57a and 56b, 57b. Short connecting vertical plates 56c5 that are connected at intervals in the direction
7c.

In addition, in the space formed between the expansion/contraction plates 56 and 57, as shown in FIG. ing.

As shown in FIG. 11, the sliding grate 58 is provided with notches 59 and 60 spaced apart in the longitudinal direction, and serves as a connecting vertical play (56c) for the expansion/contraction play (56) and (57) described above.
, 57c connect the upper expansion/contraction horizontal plates 56a, 57a and the elongated lower expansion/contraction horizontal plates 56b, 57b via the same notches 59,60.

In addition, the length of the notch 59.60 is the length of the connecting vertical play 5.
6c and 57c+the sliding length of the sliding plate 58.

Further, in the above configuration, the support plate 55, the expansion/contraction plates 56, 57, and the sliding plate 58 are connected in a sewn state by a pair of connecting bolts 61, 62 provided at intervals in the longitudinal direction.

When connecting by suture, each connecting bolt 61
3.64 and then provided on the upper expansion/contraction horizontal plates 56a, 57a of the expansion/contraction plates 56.57) 6
1.62, through circular holes 63 and 64 of the same diameter, then through the letter-shaped long sliding holes 65 and 66 that widen toward the rear as shown in Fig. 8, and finally, It passes through a long hole 67.68 of the same diameter as the connecting bolt 61.62 provided on the lower expansion/contraction horizontal plate 1-56b, 57b of the expansion/contraction plate 56.57.

In addition, bearings G9, 61, 62 are provided in the portions of the connecting bolts 61, 62 corresponding to the sliding slots 65, 66 in order to ensure smooth relative movement between the connecting bolts 61, 62 and the sliding plate 58.
I am wearing 70.

With this configuration, when the sliding plate 58 in the state shown in FIG. 6 is moved rearward, the connecting bolts 61, 62
is a square-shaped sliding slot 65 provided in the sliding plate 58.
66 toward the front.

Since the distance between the sliding elongated holes 65 and 66 is gradually narrowed toward the front, the connecting bolts 6] and 62 also have elongated holes 63°6 provided in the width direction on both sides of the support plate 55.
The expansion/contraction plate 56.5 approaches the center along 4 and narrows the interval (and is integrated with the connecting bolt 61.62).
7 also approaches the center and narrows the distance between them, resulting in the state shown in FIG.

By the way, the expansion/contraction plates 56, 57 have expansion/contraction molds 33, 34 attached to their lower expansion/contraction horizontal plates 56b, 57b, and these expansion/contraction molds 33, 34 can be expanded/contracted as shown in FIGS. 6 and 7. It is inserted and engaged in the space between the claw engaging member 31.32 and the reinforcing rib 29.30.

Therefore, as described above, as the expansion/contraction plates 56, 57 approach, the expansion/contraction molds 33, 34 also approach, and this approach causes the expansion/contraction claw engaging member 3 connected to the inner wall of the core 11 to approach.
1 and 32 also approach, and as a result, the core 11 is reduced and deformed from the shape shown in FIG. 6 to the shape shown in FIG. The core 11 can be removed from the molded concrete product.

In this embodiment, the sliding plate 5B is moved forward and backward by connecting the rear end of the sliding plate 58 to a forward/backward rack 71 disposed within the elevator frame 53, and connecting a pinion 73 driven by a drive motor 72 to the forward/backward rack 7I. This is done by a sliding plate advance/retreat mechanism constructed by meshing the two.

However, the sliding plate advancing/retracting mechanism E is not limited to what is shown in the drawings, and may be formed by, for example, a combination of a worm and a worm wheel.

Next, a demolding operation using the core detaching device A having the above configuration will be briefly explained.

That is, with the core 11 attached to the outer frame 12 in the state shown in FIG. 6, the concrete product forming space S is filled with material and cured for a certain period of time.

After sufficient curing, first, drive the moving cart 5 and move the core expansion/contraction mechanism B to the core 11 in the state shown in FIG.
insert the expansion/contraction molds 33, 34 into the expansion/contraction claw engaging member 31.
32.

Next, the sliding plate advancing/retracting machine fME is driven to move the sliding plate 58 backward, and the core 11 is reduced in size and removed from the concrete product molded in the concrete molding space S in the manner described above.

Thereafter, the movable cart 5I is driven again to take out the core 11 from the outer frame 12 together with the core expansion/contraction mechanism B.

Finally, the left and right side plates 14 and 15 of the outer frame 12 and the end plate 161
7 is tilted outward, and the concrete product is transported to a storage yard or the like using a vacuum transport device (not shown) or the like.

With the configuration described above, this embodiment has the following effects.

■ Centering on the vertical axis of vertical axis e, the end plate is 16°17
Since it is configured to be able to open and close freely in the front and rear directions, the entire weight of the end plate 16.17 can be held on the vertical axis e during the entire opening and closing operation, and the end plate 16.17 can be opened and closed with a slight opening and closing force.
can be opened and closed smoothly and safely.

■Since the above-mentioned vertical axis e is provided on one side of the outer frame body 12, the end plates 16 and 17 can be fully opened,
It is possible to easily demold concrete products.

[Brief explanation of drawings]

Fig. 1 is a front view of the formwork structure according to the present invention, Fig. 2 is a side view thereof, Fig. 3 is a plan view thereof, Fig. 4 is a vertical sectional view taken along line 1-1 in Fig. 1, and Fig. 5 is a vertical cross-sectional view taken along the line ■-■ in Figure 3,
Figures 6 and 7 are cross-sectional explanatory views showing the internal structure of the core in the expanded state and contracted state, respectively, Figure 8 is a side view showing the overall configuration of the core removal device, and Figure 9 is a plan view thereof. , the 10th is shown in Fig. 8 [arrow view taken along line 1l-III, 11th
The figure is an enlarged plan view of the main part of the sliding plate. In the figure, A: Core attachment/detachment device B: Core expansion/contraction mechanism C: Core expansion/contraction mechanism moving mechanism 1O: Formwork with core 11: Core 12: Outer frame body

Claims (1)

[Claims] 1. In a formwork structure in which a core is built into the outer frame, mirror plates are attached to both ends of the outer frame, and a space for forming a concrete product is formed inside, on one side of the end surface of the outer frame, Corresponding sides of the end plate are connected by a vertical pivot,
A formwork structure that allows an end plate to be easily opened and closed, characterized in that the end plate can be freely opened and closed in the front and rear directions around the vertical axis of the vertical axis.