JPH0411081B2 - - Google Patents

Description

[Detailed Description of the Invention] Object of the Invention [Field of Industrial Application] The present invention relates to a mold for manufacturing molded products from cement, synthetic resin, clay, etc., and particularly relates to molds arranged opposite to each other. This invention relates to a mold with adjustable spacing.

[Conventional technology]

BACKGROUND ART Conventionally, in order to maintain a predetermined distance between mold frames disposed opposite to each other, a mold is known in which the distance is adjusted by tightening a bolt-shaped distance adjusting member between the mold frames. Further, as a mold that can be assembled with one touch so as to maintain a predetermined interval, for example, the mold described in Japanese Utility Model Publication No. 57-48969 is known.

[Problem to be solved by the invention]

However, such conventional molds have the following problems.

That is, in a mold using bolt tightening, there was a problem in that workability was poor because bolt tightening and releasing operations required time and effort. In particular, when manufacturing long molded products, it is necessary to tighten bolts at multiple locations in the longitudinal direction to prevent the central part from bulging, which requires extremely complicated work and The problem is that the bolts create multiple through holes, which must be filled after the molded product is taken out, which not only reduces productivity but also creates uneven parts in the molded product, which is unfavorable in terms of manufacturing. It was hot.

Further, in the mold described in Japanese Utility Model Publication No. 57-48969, the mold can be assembled with one touch, and it is possible to prevent bulges in the center of the mold. However, since the one described in this publication is a mold for manufacturing a molded product for a U-shaped groove, a spacing adjustment member is present in the center of the mold. For this reason, when applied to a mold for manufacturing a cylindrical elongated molded product such as a box culvert in an upright state, there is a problem in that undesirable through holes are formed in the molded product as described above. Nevertheless, when the tightening device described in the publication is applied to a mold for manufacturing a cylindrical long molded product in an upright state, such as a box culvert, it is necessary to prevent the interval adjustment member from being buried in the molded product.
For example, it is necessary to provide a cover around the distance adjusting member, which poses a problem of poor workability and productivity.

Structure of the Invention The present invention has been made to solve these problems, and after intensive efforts, the following structure has been adopted.

[Means to solve the problem]

That is, the gist of the present invention is to provide: a plurality of outer mold members disposed facing the inner mold so as to surround the inner mold; a spacing adjustment member consisting of a movably supported rod, a tightening arm that is swingably supported at the free end of the rod and has a notch at its tip; A hooking bar is provided on the other upper part of the clamping arm, and the notch of the tightening arm can be hooked thereto, and the inner and outer molds are connected by swinging the tightening arm after hooking the notch to the hooking bar. A mold for molding a long cylindrical molded product in an upright state with adjustable mold spacing, wherein the spacing adjustment member has the cutout portion shaped to sandwich the hook bar, and The attached arm is configured to be able to swing across a line connecting the supporting parts at both ends of the rod, and is supported to be able to swing in a horizontal plane on the outside of one vertical side of the adjacent outer mold, and is free to swing. A clamp member having a holding member at an end is also provided, and the clamp member is configured to assemble the outer molds by attracting the vertical sides of the adjacent outer molds to the vertical sides of the outer mold supported by the clamp member. The mold is characterized by:

[Effect]

In the mold of the present invention having the above configuration,
After swinging the spacing adjustment member supported on the upper part of one of the formworks arranged facing each other and hooking the hook bar provided on the upper part of the other formwork with the notch of the tightening arm, By swinging the clamping arm in the direction of the formwork, the other formwork is drawn toward one formwork. At this time, when the hook is located on the line connecting the support parts at both ends of the rod, the gap between the two formworks becomes the minimum, and the tightening arm is further swung to move the hook in the direction that straddles the line. When it is moved, the space between both formworks will be expanded in the direction of expansion.

Further, the clamp member is oscillated to press the adjacent outer molds from the outside to the inside, so that their vertical sides are brought into strong contact with each other.

As a result, in the assembled state, the upper part of the outer mold cannot move inward or spread outwards due to the action of the spacing adjustment member, and the center part of the outer mold cannot move beyond that position due to the action of the clamp member. It does not spread beyond its position. In other words, one feature of the interval adjusting member is that it exhibits the function of maintaining the interval.

FIG. 10 shows the force relationship acting on the outer mold when cement or the like is injected between the outer mold and the inner mold.

That is, the outer mold is subjected to a force that tries to spread outward due to the pressure p of the cement, but the clamp member prevents it from spreading at the center and generates an inward reaction force F2, while at the upper part the spacing adjustment member protrudes. It acts as a tension rod and applies an outward reaction force F1, and an outward reaction force F3 also acts on the lower end.

Such a balanced relationship can also be achieved by bolt fastening, but this requires a troublesome and time-consuming bolt fastening operation.

In contrast, according to the present invention, the swingable spacing adjustment member and the clamp member are attached to specific positions, and the upper part functions as a tension rod from the inside, and the central part functions as a tension rod from the outside. By applying force, it has become possible to reliably perform the bulge prevention effect with a simple operation, which was conventionally achieved after a tedious tightening process.

At this time, the tightening arm is configured to be able to swing across a line connecting the support portions at both ends of the rod. That is, the tightening arm is set beyond a so-called dead point. Therefore, the length of the spacing adjustment member does not change in response to a horizontal load.

In addition, even if a horizontal load is applied to the clamp member, it will not be swung either.

Another major difference from bolt fastening is that bolt fastening requires the bolt to pass through from the outer mold to the inner mold, which creates a through hole in the molded product. can also be resolved.

On the other hand, if the technology of Publication of Utility Model Publication No. 57-48969 is applied as is to an upright mold for a long cylindrical molded product, the bulge in the center as shown in Figure 11A of Publication of Utility Model Publication No. 57-48969 Even if this can be prevented, the upper part may spread, making it impossible to produce molded products of good quality.

In addition, if the technology of Utility Model Publication No. 57-48969 is simply applied to an upright mold for a long cylindrical product by changing its placement position, the bulge in the center will be prevented as shown in Figure 11B. become unable.

〔Example〕

Next, one embodiment of the present invention will be described based on the drawings.

Figures 1 and 2 show the mold of the present invention, Figure 3 A to C show the bottom mold, Figure 4 A and B show the inner mold in the widened state, and Figure 5 A and B show the bottom mold. is the inner mold in the reduced width state,
Figures 6A to 6C show movable side plates, Figures 7A and 7B show space adjustment members for adjusting the distance between the upper parts of the formwork, and Figure 8
The figure shows the fixing mechanism of the lower part of the moving side plate.

This embodiment is a mold for a cement molded product for a box culvert waterway, and the mold 1 has a bottom mold 10,
An inner mold 30 installed on the bottom mold 10 and an outer mold 50 arranged on all sides of the bottom mold 10 so as to surround the inner mold 30.
, an upper mold 80 , and a spacing adjustment member 90 swingably supported on the upper part of the inner mold 30 .

The bottom mold 10 has rail members 11 arranged in parallel.
a, 11b, girder members 13a to 13c arranged in an H-shape at the center of the rail members 11a and 11b, and a bottom having a cross-sectional shape as shown in FIG. It consists of a formwork 14. The bottom formwork 14 consists of a bottom plate 15 having an octagonal opening in plan as shown in FIG.
7a and 17b, and a top plate 19 that is bent to form a fitting step at the lower end of the molded product 100. In addition, the inner plate 17
A groove 21a for fitting a packing material is provided on the entire upper circumference of the outer plate 17b, and a similar groove 21b is provided on the upper part of the side perpendicular to the rail members 11a and 11b of the outer plate 17b. Further, the top plate 19 is connected to the lower ends of side plates 51a, 51b forming the outer mold 50 at sides parallel to the rail members 11a, 11b.

The inner mold 30 is configured to be expandable and contractible in order to facilitate removal of the molded product after manufacturing, and includes a pair of first wedge-shaped mold frame members 31a and 31b that are arranged facing each other and contract in width from top to bottom; First wedge-shaped formwork member 3
A pair of second wedge-shaped formwork members 33 that are disposed adjacent to 1a and 31b and widen from top to bottom.
a and 33b, and a sliding surface is formed between each wedge-shaped frame member. That is, sliding plates 35a to 35d are provided on both side edges of the first wedge-shaped formwork members 31a and 31b toward the inside of the inner mold 30, and the peripheral surface 3
Similarly, sliding plates 37a to 37d are provided on the second wedge-shaped frame members 33a and 33b, and each sliding plate 35a to 3
A sliding surface is formed by 5d and 37a to 37d.

Here, each of the sliding plates 37a to 37d is provided with four elongated slide holes 39 on the center line, and the slide passes through the sliding plates 35a to 35c and the sliding plates 37a to 37c and slides inside the slide holes 39. Four pieces 41 are each fixed to predetermined positions of the sliding plates 35a to 35c by fastening bolts. Slide piece 4
Sliding rollers 43 are provided at the penetrating end portions of the rollers 1, respectively, and are slidable on the sliding plates 37a to 37c.

Further, the actuator 70 is bolted onto the girder member 13c as shown in FIG.
is located at the center of The actuator 70 is a hydraulic cylinder, and the upper end of the rod 71 is connected to the link 45 between the first wedge-shaped formwork members 31a and 31b.
The arm member 47 is pivotally connected to the lower surface of the center of the arm member 47 via a pin. Although the supply of hydraulic pressure to the actuator 70 is omitted from the illustration, the mold 1 is supplied from an opening provided in the girder member 13a or 13b.
It is supplied from a hydraulic power source through a hydraulic pipe led to the outside of the system.

Next, the outer mold 50 will be explained. The outer mold 50 is
The side plate 51 has its lower end connected to the bottom mold 10 as described above.
a, 51b, and movable side plates 51c, 51d movable along the rail members 11a, 11b.

The movable side plates 51c and 51d are made of plate material 52,
Lower frames 55 each having two wheels 53 are provided on the left and right in the lower part, and struts 57 are erected at the ends of the lower frames 55, respectively. The upper part of the support column 57 is provided with a swing shaft 59 disposed so as to span between the support supports, and a swing lever 6 is provided at the end of the swing shaft 59.
1 is provided. As shown in FIG. 6B, the swing shaft 59 is cut at the center of the support column 57, and the cut portion is connected to the swing shaft 59 by an eccentric shaft 63 eccentric to the swing shaft 59. .

One end of a link 65 is pivotally supported on the eccentric shaft 63, and the other end of the link 65 is pivotally supported at a predetermined position on the plate member 52. Further, although the plate material 52 is suitably reinforced with a reinforcing material, it is provided with a non-reinforced portion 67 at the bottom as shown in the figure. As will be described later, the non-reinforced portion 67 acts as a hinge portion when the swing lever 61 is operated.

Note that the side plates 51a and 51b also have the same configuration as the movable side plates 51c and 51d, except for the configuration of the wheels 53. Furthermore, an upper die 80 is provided at the top of each of the side plates 51a to 51d to form a fitting stepped portion at the upper end of the molded product 100 so that the molded products fit together when forming a waterway with the molded product 100. It is being

A spacing adjustment member 90 is disposed at the upper end of the inner mold 30. The spacing adjustment member 90 includes a rod 91 whose one end is swingably supported at the upper end of the inner mold 30;
It consists of a presser arm 93 screwed onto the free end of the rod 91 with a nut, and a tightening arm 95 pivotably supported on the free end of the presser arm 93.
In this embodiment, the rod 91 and the presser arm 93 are
Together, they constitute the rod referred to in the present invention. As shown in the figure, the presser arm 93 is provided eccentrically upward relative to the axis of the rod 91, and has a bent shape with its free end below the axis. At the bent tip,
The support shaft 97 is supported so that its center is below the axis of the rod member 91. In addition, the tightening arm 9
As shown in the figure, the free end of the outer mold 50 is provided with a cutout 101 for hooking a hook 99 provided at the upper end of the outer mold 50, and the end on the support shaft 97 side is provided with a swing lever 103.

As shown in FIG. 7A, the notch 101
9 is hooked, by swinging the tightening arm 95 in the interval adjustment direction (counterclockwise in the figure), the holding arm 93 and the tightening arm 95 clamp the hooking rod 99 on the axis of the rod 91. possible.

With the above configuration, the interval adjusting member 90 is capable of swinging the tightening arm 95 across the line DD connecting the support portions at both ends of the rod, as will be described later.

Next, a molded product 100 is manufactured using the mold 1,
The functions achieved by each configuration will be explained in accordance with the procedure for taking out the device.

First, the assembly of the mold 1 will be explained. As mentioned above, the bottom mold 10 has a substantially square-shaped recessed part in the center, and the inner mold 30 is accommodated in the recessed part. Outer wall surface and inner plate 17a of bottom formwork 14
The inner mold 30 is brought into a state in which the molded product 100 can be produced by being brought into close contact with the inner mold 30 through the packing material. At this time, the actuator 70 acts to move the first wedge-shaped form members 31a, 31b downward, and as the actuator 70 moves downward, the The two wedge-shaped formwork members 33a and 33b are moved in the width-widening direction. At this time, the second wedge-shaped formwork member 33
a, 33b are in a state of being grounded on the girder members 13a to 13c in advance, and since the actuator 70 is installed at the center of the bottom mold 10, it comes into close contact with the bottom mold 14 without any alignment. moved to position. Here, by configuring the part corresponding to the bottom of the bottom mold 10 with the girder members 13a to 13c, the ground contact area of the second wedge-shaped frame members 33a and 33b is small, so that the ground contact part during expansion/contraction movement is The frictional force is small, and the above-mentioned operations are performed smoothly.

Next, the outer mold 50 is assembled. Moving side plate 5
1c and 51d are moved to predetermined positions, and the adjacent side plates are tightened with the clamps 109. At this time, the side plates 51a to 51d are tightened and assembled in a state perpendicular to the bottom mold 10, as shown by solid lines in FIG. 6A. still,
At this time, the swing lever 61 is moved in the direction of the arrow in FIG.
By swinging the movable side plate 51d to a position adjacent to the side plates 51a and 51b with the movable side plate 51d tilted as shown by the two-dot chain line, and then swinging the swing lever 61 in the direction opposite to the arrow shown in the figure. , side plate 51
The upper die 80 can be press-fitted between a and 51b for alignment. As shown in FIG. 2, the upper mold 80 has both side ends tapered at the upper part of each side plate 51a to 51d, and the side plate 51a is formed by the above procedure.
51d are assembled, positioning can be easily performed by the action of adjacent upper molds 80.

Further, the lower portions of the movable side plates 51c and 51d are connected to the eighth
As shown in the figure, it is provided with a tightening member 110 similar to the interval adjusting member 90, and for the similar configuration, the rod 91 is replaced by a rod 111, which is numbered by adding 20 to the member numbers shown in FIGS. 7A and 7B. , and detailed explanation will be omitted. Note that, unlike the interval adjustment member 90, the right end of the rod 111 in the figure is slidable via a pin 127 on a slide member 125 provided on the lower frame 55, and the tightening arm 115 has a notch. First, direct hook bar 119
It is pivoted on. When tightening, the swing lever 113 swings in the direction of the arrow in the figure, so that the pin 127 slides on the slide member 125 and is guided to the hook 129 provided at the bottom of the bottom form frame 14. It is configured to tighten between the hook 129 and the hook bar 119.

As described above, the bottom mold 10, the inner mold 30, and the outer mold 50
is assembled in the predetermined position, the spacing adjustment member 90
Thus, the distance between the inner mold 30 and the outer mold 50 is maintained at a predetermined value. Incidentally, although not shown in the drawings, in this embodiment, the interval adjusting member is attached to each of the wedge-shaped frame members 31a, 31.
A total of eight pieces are provided, two on each corner of the inner mold 30, and two on each corner of the side plates 51a to 51d.

Here, the effects of the interval adjusting member 90 adopted in this embodiment will be explained in FIGS. 9A to 10C.
This will be explained in more detail based on the figures.

Since the interval adjusting member 90 is configured as described above, first the hooking rod 99 can be adjusted as shown in FIG. 9A.
After hooking on the notch 101, the swing lever 103 is operated counterclockwise in the drawing. Then, the outer mold 50 is moved in a direction approaching the inner mold 30. As shown in FIG. 9B, when the swing lever 103 is swung to the position where the support shaft of the rod 91, the support shaft 97 of the tightening arm 95, and the hook bar 99 are aligned, the inner mold 30 and The distance from the outer mold 50 is the smallest. After that, further operate the swing lever 103,
As shown in FIG. 9C, the hook bar is positioned above the line DD in the figure and is held between the presser arm 93 and the tightening arm 95. Here, by operating the swing lever 103 from the state shown in FIG. 9A to the state shown in FIG. When it is tightened, it will be pushed back by Δd as shown in the figure.

Further, the clamp 109 is oscillated to press the adjacent side plates 51a to 51d from the outside to the inside so that their vertical sides are brought into strong contact with each other.

As a result, due to the action of the interval adjustment member 90, the upper parts of the side plates 51a to 51d cannot enter inward from that position, and due to the action of the clamp 109, the upper parts of the side plates 51a to 51d cannot be moved inwardly.
The central portions a to 51d do not expand outward beyond that position.

The force relationship acting on the outer mold 50 when cement or the like is injected between the outer mold 50 and the inner mold 30 is shown in FIG. 10.

That is, the outer mold 50 is subjected to a force that tries to spread outward due to the pressure p of the cement, but in the center part the clamp 109 prevents the spread and an inward reaction force F2 is generated, while in the upper part the space adjustment member 90 acts as a tension rod and the outward reaction force F1
, and an outward reaction force F3 also acts on the lower end. Since these elements maintain a balanced relationship, the balanced relationship of the outer mold 50 during the production of a molded product is considered to be like that of an inwardly convex beam as shown in the figure.
As a result, the center portion of the outer mold 50 does not swell.

Further, since the tightening arm 95 is set beyond a so-called dead point, the length of the interval adjusting member 90 does not change in response to a horizontal load.

In addition, even if a horizontal load is applied to the clamp 109, it will not be swung either.
Therefore, an excessive load is not applied to the tightening member 110, and the outer mold does not bulge outward, and especially when molding a long object, the inner and outer molds 3 are prevented from being applied as shown in this embodiment.
It is only necessary to tighten the upper part of the 0.0, 50 with the interval adjustment member 90, and there is no need to fix a bulge prevention band etc. to the outer periphery of the outer mold 50, making it possible to manufacture molded products with high precision in an extremely simple manner. can.

Next, the effects of the inner mold 30 and actuator 70 employed in this embodiment will be explained based on FIGS. 4A and 4B.

First, the mold 1 assembled as described above
A molding material such as cement is injected into the molding space. Thereafter, the molding material is solidified after a predetermined period of time has elapsed, and a molded product 100 is manufactured as shown in FIG. 4B.

Next, the interval adjusting member 90, the clamp 109, and the tightening member 110 are all released, and the movable side plates 51c and 51d are moved to a position where the molded product 100 can be taken out. At this time, the upper mold 80 and the molded product 10
The top surface of the plate member 52 and the side surfaces of the molded product 100 are in close contact with each other. Therefore, in order to facilitate the above-mentioned movement, the movable side plate 52 is tilted in advance by operating the swing lever 61 to tilt the plate 52 around the non-reinforced portion 67 to eliminate the above-mentioned close contact state.
c and 51d to a position where the molded product 100 can be taken out. In addition, other side plates 51a, 51
By tilting b in the same way, the molded product 10
0 and the outer mold 50 are released.

Next, by driving the actuator 70 and pushing up the arm 47, the link 4
At 5, the first wedge-shaped frame members 31a, 31b connected to the arm 47 are pushed upward. Along with this, the slide piece 43 moves to the upper end of the slide hole 39, and the second wedge-shaped formwork members 33a, 33b move by an amount corresponding to the slope of the sliding surface.
is moved toward the center of the inner mold 30. At the same time, the first wedge-shaped form members 31a and 31b also move toward each other due to the action of the link 45, and the inner mold 30 as a whole enters a width-reduced state around the actuator 70. As a result, a gap is formed between the molded product 100 and the inner mold 30, and the molded product 100
can be easily taken out using a crane or the like.

After that, when manufacturing a molded product again, follow the assembly procedure of the mold 1 described above, and move the actuator 70, movable side plates 51c and 51d, and swing lever 61.
is operated, the interval adjustment member 90 and the clamp 10
9. Each mold can be easily and reliably assembled in a predetermined positional relationship by the tightening member 110.

As explained below, by using the mold 1 of this embodiment, the inner mold 30 and the outer mold 50 can be assembled by adjusting the distance between the inner mold 30 and the outer mold 50. Prevention can be carried out conveniently. In particular, it is extremely effective when producing long molded products. In addition, molded product 1
00 does not have any through holes or the like in its peripheral wall portion, so there is no need to perform hole filling work after taking out the molded product 100, and workability, productivity, and product quality can be significantly improved. .

Although one embodiment of the present invention has been described above, the present invention is not limited to this in any way, and various embodiments can be adopted without departing from the gist thereof.

For example, the hooking rod may be erected on the upper part of the outer mold, and the interval adjusting member may be configured to be swingable in the horizontal direction. Further, the hooking rod may be arranged as in the embodiment, the rod may be swingable in the horizontal direction, and the tightening arm may be swingable in the same direction as in the present embodiment.
On the contrary, the rod may be made swingable in the same manner as in this embodiment, and the tightening arm may be pivoted in the horizontal direction to hook a hook bar erected from the upper part of the outer mold. Note that the spacing adjustment member 90 is a rod and does not have a presser arm 93, and is configured as a hook bar so that it is hooked on a tightening arm so that the hook bar does not hit the rod. The tightening arm may be swingable across the connecting line. Naturally, the spacing adjustment member may be supported not only on the inner mold side but also on the outer mold side. Furthermore, the configuration of the present invention may be applied not only to molds for box culvert waterways but also to molds for manufacturing various elongated cylindrical molded products in an upright state.

Effects of the Invention As explained above, according to the mold of the present invention,
It is possible to easily and simply maintain the molds at a predetermined interval by preventing bulges between the molds. In addition, the molded product does not have undesirable through-holes, and can be manufactured with good quality. As a result, workability and productivity have been significantly improved, making it possible to manufacture high-quality molded products.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view of the embodiment, Fig. 2 is a partially cutaway plan view, and Fig. 3A is a plan view of the bottom mold.
Figure 4B is a sectional view taken along the line A-A, Figure 4C is a cross-sectional view showing the cross-sectional shape of the bottom form, Figures 4A and 4B are a perspective view and a sectional view illustrating the state of the inner mold during the manufacture of a molded product, Figures 5A and 5B are a perspective view and a sectional view illustrating the state of the inner mold when taking out the molded product, Figure 6A is a front view of the movable side plate, and Figure 6B is an explanatory view of the main parts explaining its tilting mechanism. 7A and 7B are a front view and a plan view showing the interval adjustment member, FIG. 8 is a front view showing the tightening member, and FIGS. 9A to 10C are FIG. 11 is an explanatory diagram illustrating the function of the spacing adjustment member, and FIG. 11 is an explanatory diagram illustrating the difference in function between the embodiment and the prior art. 1... Molding mold, 10... Bottom mold, 30... Inner mold, 50...
Outer mold, 70...actuator, 80...upper mold, 90
... Spacing adjustment member, 91... Rod, 93... Presser arm, 95... Tightening arm, 99... Hook bar, 101...
Notch, 100... Molded product, 110... Tightening member.

Claims (1)

[Claims] 1. A plurality of outer mold members disposed facing the inner mold so as to surround the periphery of the inner mold, and swingably supported on the upper part of one of the opposing inner mold or outer mold members. a spacing adjustment member consisting of a rod with a cylindrical shape and a tightening arm swingably supported on the free end of the rod and having a notch at its tip; and a hook rod on which the notch of the tightening arm can be hooked, and the distance between the inner mold and the outer mold is adjusted by swinging the tightening arm after hooking the notch on the hook rod. A mold for molding an adjustable elongated cylindrical molded product in an upright state, wherein in the interval adjustment member, the cutout portion is a cutout shaped to sandwich the hook bar, and the tightening arm includes: The above-mentioned rod is configured to be able to swing across a line connecting the supporting parts at both ends, and is supported to be able to swing in a horizontal plane on the outside of one vertical side of the adjacent outer mold, and a holding member is provided at the free end. It also has a clamp member having a structure, and the clamp member is configured to assemble the outer molds by attracting the vertical sides of the adjacent outer molds to the vertical sides of the outer mold supported by the clamp member. Molding mold.