JP5271101B2 - Form for manufacturing concrete product and method for manufacturing concrete product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To dispense with complicated manual work to improve productivity in manufacturing a concrete product having a recess opened to a side face and inclining down toward the inner side. <P>SOLUTION: This form for manufacturing a concrete product includes: a form body 10 provided with bottom plates 2 supported on a frame 6, side plates 3, 4 erected on both right and left side edges of the bottom plates 2, and a pair of end plates longitudinally tiltable with the lower parts pivoted to the frame 6; and cores 20 each detachably arranged in the form body 10 to form a recess and having an inclined angle section formed by connecting, through a top face part, an upper side face part 22 and a lower side face part 23 of inclined face shape inclining upward continuously with a base end face part 21 for forming an opening of the recess. A support piece (a pin 30) supporting lower side face parts 23 at both ends of the core 20 located in the recess forming position in the form body 10 to position the core is protrusively provided on the inner surface of each end plate, and the lower side face part 23 is supported by the support piece to hold the core 20 in the predetermined recess forming position. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a mold for producing a concrete product and a method for producing a concrete product using the mold, and more specifically, a concrete having a recess that is open over the entire length on a side surface and is inclined downward toward the back side. The present invention relates to a mold for manufacturing a product and a method for manufacturing a concrete product using the mold.

  After installing a concrete boundary block between the roadway and the sidewalk or between the roadway and the median strip on the road, it enters into the gap generated between this boundary block and the paving material such as asphalt or concrete. As concrete blocks that prevent weeds from breeding due to germination of seeds, etc., concrete blocks have been proposed in which concave portions having various cross-sectional shapes opened on the side surfaces (wall surfaces) of the blocks have been proposed. (For example, see Patent Documents 1 and 2.)

  The concrete block provided with the above-mentioned concave portion has a shape of the concave portion, so that the sprouted buds of the weed seeds grow upward due to the light reflection, and the roots extend downward due to the geodesicity. By inducing roots, buds and root growth are prevented to obtain herbicidal properties. FIG. 10 shows the formation of a median strip that is similar to that exemplified in Patent Document 1 above. Is a boundary block (also referred to as a herbicidal block) that is preferably used for FIG. 10 shows a cross section of the boundary block 50. A concave portion 52 is provided over the entire length of the block 51, and the upper inner surface and the lower inner surface of the concave portion 52 are provided on the side surface 51 opposite to the roadway side when installed on the road. , Both are inclined downward toward the inner side of the concave portion, and the concave portion 52 as a whole has an inclined mountain-shaped cross section inclined downward with the inner end 53 as a top surface. The boundary block 50 is a molding / manufacturing target in an example of an embodiment of the present invention described later.

  FIG. 11 shows a conventional manufacturing method of the boundary block 50. As shown in the figure, the boundary block 50 is formed in an upside-down state when installed on a road. The vertical direction related to the mold frame and molding is referred to as the vertical direction during molding. As shown in the figure, a conventional mold 60 includes a bottom plate 62, side plates 63 and 64 fixed on a base frame 61, and a pair of opening and closing type end plates, and opens on a side surface 51 of a molded product (boundary block 50). In order to form the concave portion 52 inclined downward toward the back side, the base end portion of the core 65 having the same cross-sectional shape as the concave portion 52 (however, an inclined mountain shape inclined upward toward the top due to upside down) is formed. The side plate 63 is fastened and fixed by a plurality of bolts 66. Then, concrete is placed in the mold 60, and after the cast concrete is hardened, an operator removes the bolt 66. Then, the core 65 is taken out together with the molded product, and the core 65 is extracted from the molded product. Thus, a process of attaching the core 65 to the side plate 63 with the bolt 66 again for the next molding process has been adopted.

  For this reason, a complicated manual operation of attaching and detaching the core 65 to and from the side plate 63 with the bolt 66 is required for each molding, manpower and labor are inferior, and productivity is inferior. Even if it is going to use the integral-type multi-cavity formwork arranged in parallel, since a space for the core attaching / detaching work by the bolt outside the side plate 63 part is necessary, the pair of the formwork 60 of FIG. It was impossible to construct a multi-cavity mold form that was more than a two-form mold form that was symmetrically arranged.

Japanese Patent No. 3698265 JP 2006-52626 A

  The present invention has been made in view of the above-described conventional problems, and does not require complicated manual work when manufacturing a concrete product having a recess that is open on the side surface and inclined downward toward the back side. An object of the present invention is to provide a concrete product manufacturing mold and a method for manufacturing a concrete product, which can improve the quality of the mold and can make a multi-mold by forming a multi-cavity mold.

  In order to achieve the above-mentioned object, a concrete product manufacturing form according to claim 1 is a form for producing a concrete product having a concave part that opens over its entire length on a side surface, and a bottom plate supported on a base frame, An openable mold body comprising a side plate erected on both left and right side edges of the bottom plate, and a pair of end plates pivotally supported at lower ends at both front and rear ends of the base frame and tiltable in the front-rear direction; An upper side surface and a lower side surface of the recessed portion forming core that is detachably disposed in the mold body, and that are inclined upwardly following the base end surface portion for forming the opening surface of the recessed portion. A core having an inclined mountain-shaped cross-section formed by connecting portions through a top surface portion, and the lower side surface portions at both end portions of the core positioned at the recess forming position in the mold body. A support piece for supporting and positioning the core is provided on the inner surface of each end plate. The core is held in a predetermined recess forming position by supporting the lower side surface portions of the both ends of the core with the base end surface abutted along the inner surface of the side plate by the support pieces. It was made to do.

  According to the first aspect of the present invention, when placing concrete, the core for forming the recesses has its base end face abutted along the inner surface of the side plate, and the lower side faces of both ends of the core are used as support pieces. It is only necessary to set it in the mold body in contact with it, and when removing the concrete molded product after hardening the concrete placed in the molding space of the mold body, the removal work from the side plate of the core is Since it is not required at all, manual work is easier and shorter than conventional molds that require complicated manual work of attaching and detaching the core to and from the side plate for each molding as in the prior art. In addition, since there is no need for a space for attaching / detaching the core on the outside of the side plate as in the prior art, a plurality of molded parts extending in the longitudinal direction can be arranged on the left and right, and a multi-cavity mold can be easily configured. is there.

In the present invention, as the support piece, those having various shapes attached to the end plate by welding or screwing so as to protrude from the inner surface of the end plate can be used. when piece is detached pin der the projecting base portion from the inner surface is detachably attached to該妻plate fitted in a hole portion provided in the end plate of said tip portion end plate is, the more the pin from the end plate the hole in the fitted tip surface replacement pin short to be substantially flush with the inner surface of the end plate is, if a configuration that is provided with said pins, to produce a no concrete products recesses In this case, if the pin is removed from the end plate, the replacement pin is attached instead, and molding is performed using a mold body that does not place the core inside, the front and rear end faces are flat and the appearance is good. Co with no recess It is economical because it is not necessary to prepare two types of molds with and without recesses.

  Further, the method for producing a concrete product according to claim 3 uses the core for making the base end surface abutted along the inner surface of the side plate using the concrete product production form according to claim 1 or 2. By supporting the lower side surface portions at both ends of the mold with the support pieces, the concrete is placed in the molding space of the mold body which holds the core at a predetermined recess forming position and is in a mold-closed state. And opening the both end plates after hardening of the cast concrete, and taking out the concrete molded product in which the core is embedded from the mold body, and after removing the core, extracting the core from the concrete molded product. And

  According to the third aspect of the present invention, as described above with respect to the first aspect of the present invention, the manual operation for attaching and detaching the core during the manufacture of the concrete product is easy and can be done in a short time, and the productivity can be improved. Further, productivity can be further improved by using a multi-cavity mold. Further, by opening the both end plates after the cast concrete is hardened, the support pieces integral with the respective end plates are pulled out from both ends of the concrete molded product, so that the concrete molded product can be taken out from the formwork body without any trouble.

  As described above, according to the present invention, at the time of manufacturing a concrete product having a concave portion that opens on the side surface and is inclined downward toward the back side, productivity can be improved without requiring complicated manual work. In addition, a multi-cavity mold can be formed and a multi-cavity can be obtained.

  In addition to the above effects, according to the invention described in claim 2, by using the replacement pin instead of the pin, it is possible to obtain a concrete product having a good appearance having no recess, and the mold is formed into a recess. It is economical because it can be used for molding both products with and without.

It is a top view of the formwork which shows an example of embodiment of this invention. It is the sectional view on the AA line of FIG. It is a side view of the formwork of FIG. It is an expanded sectional view of the core 20 in FIG. FIG. 3 is an enlarged view of a portion B (a vicinity of the core 20 and the pin 30) in FIG. 2; FIG. 6 is a cross-sectional view taken along the line C-C in a state where the core 20 of FIG. 5 is removed, and a side view (b) of the pin 30 in a removed state. FIG. 7 is a view corresponding to FIG. 6 when a replacement pin 40 is used instead of the pin 30 in FIG. 6. FIG. 2 is a front view of the DD section in FIG. 1. It is an arrow EE part partial notch side view of the state which made the end plate the small opening with the small opening stopper 11 in FIG. It is sectional drawing of the boundary block manufactured with the formwork of FIG. It is sectional drawing of the formwork for the conventional boundary block manufacture. It is sectional drawing which shows the other example of the goods for manufacture of this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to an example shown in FIGS. 1 to 3 is a four-piece mold frame that can simultaneously mold four boundary blocks 50 shown in FIG. 10, and the left and right edges of the bottom plate 2 extending in the front-rear direction. Four sets of mold members 5 for forming outer surface portions (excluding longitudinal end surfaces) of the molded product formed by integrally connecting the side plates 3 and 4 to each other are mounted on the frame 6 in parallel. Reference numerals 5a to 5c denote top end plates welded for connecting and reinforcing the upper end of the mold member 5. A common front side plate 7A and rear side plate 7B that open and close the front end portion and the rear end portion of the four sets of mold members 5 (hereinafter referred to as the “plate plate 7” when both are collectively referred to) are used as the support shaft 8. The lower end is pivotally supported by the front end portion and the rear end portion of the base frame 6 via the hinge portion 9, and is a tilting-type end plate that can freely tilt in the front-rear direction, and these end plates and the above four sets of mold members 5 An openable mold body 10 having four molding spaces is defined. Reference numeral 20 denotes a core that is detachably disposed in the mold body 10 and its configuration and support structure will be described later. As shown in FIG. 2, the four sets of mold members 5 are mounted in parallel on the frame 6 in the form of alternating left and right directions, but the left and right directions of the four sets are the same (for example, the side plates 3 are all on the right side). ).

  In FIG. 1 to FIG. 3, 11 is a small opening stopper that holds the end plate 7 in a slightly opened state, provided at the four corners of the mold body 10, and the base shaft portion 12 a of the L-shaped lever 12 is connected to the rib of the side plate 3. A base 13 is fixed to the lever 12 and the end plate 7 which are supported by a cylindrical support tube 13 fixed to the portion 3b so that the tip 12b is suspended due to its own weight when not in use. And a support plate 14 extending in the front-rear direction. The operation of the small opening stopper 11 will be described later. In addition, although the well-known toggle type clamp (die clamp) which clamps the end plate 7 to a closed state at the time of a mold closing is provided in the four corner parts in FIG. 1 of the mold main body 10, the illustration is abbreviate | omitted.

1 to 3 show a mold closed state in which the core 20 is held at a predetermined recess formation position. First, the core 20 has a total length shorter by a small amount (for example, 0.5 to 1 mm) than the length in the front-rear direction of the side plate 3. 4 and corresponding to the shape of the recess 52 of the boundary block 50 (see FIG. 10), the opening surface 54 of the recess 52 (upper and lower opening edges of the recess 52 that opens to the side surface 51). The upper side surface portion 22 that slopes upward following the base end surface portion 21 along the inner surface 3a (see FIG. 5) of the side plate 3 for forming a plane between the base portions and the base end surface portion 21. The lower surface portion 23 having an inclined surface shape inclined upward is connected via a top surface portion 24 (in this example, an arc shape) corresponding to the shape of the back end 53 of the recess 52, and the base end surface portion 21 as a whole is connected. It has a sloped mountain-shaped cross section that slopes upward toward the top as the base. . The upper side surface portion 22 connected to the upper edge of the base end surface portion 21 is the lower inner surface of the concave portion 52 (see FIG. 10), and the lower side surface portion 23 connected to the lower edge of the base end surface portion 21 is the concave portion 52. The lower side surface portion 23 is largely inclined upward from the upper side surface portion 22. That is, as shown in FIG. 4, the inclination angle θ ₂ of the lower side surface portion 23 with respect to the orthogonal plane H orthogonal to the base end surface portion 21 is larger than the inclination angle θ ₁ of the upper side surface portion 22. Note that 25 is an escape portion that forms a concave surface at the lower end portion of the upper side surface portion 22 so that the opening edge portion of the concave portion 52 is not chipped when the core 20 is extracted from the molded product after the cast concrete is hardened. Although it is configured by an inclined surface inclined upward by a small angle toward the upper edge of the base end surface portion 21, it may be configured by a curved surface or the like in which the central portion of this inclined surface is bent by a small amount downward. By providing the relief portion 25, a smooth flow of the concrete is formed at the time of placing the concrete, and a precise concrete product can be formed.

  And as the support piece which supports and positions the both ends of the core 20 in the mold body 10, each of the end plates 7 </ b> A and 7 </ b> B is provided with a pin 30 whose front end projects from the end surface of the end plate. As shown in FIG. 5, the pin 30 is provided at a position for supporting the lower surface portion 23 of the core 20, and as shown in FIG. 6 (the core 20 is not shown), a hole provided in the end plate 7B. The base 31 is detachably fitted to the portion 7a, the tip 32 following the base 31 protrudes from the inner surface 7b of the end plate 7B, and the external thread portion 33 provided integrally with the base end is attached to the bottom plate of the hole 7a. The nut 34 penetrates and is fixed. It should be noted that the distal end portion 32 of the pin 30 is not cracked in the cured concrete molded article by the distal end portion 32 that rotates together with the end plate 7B around the center of the support shaft 8 (see FIG. 3) when the end plate 7B is opened. In addition, it has a tapered shape. Further, a square bar portion 35 having a square cross section is provided following the external thread portion 33, and serves as a grip portion for gripping the pin 30 so as not to rotate when the nut 34 is rotated. The pin plate 7A is also provided with the pin 30 having the same configuration as described above.

  FIG. 7 shows a replacement pin 40 that is used when the pin 30 is removed, and is used when a boundary block that does not have the recess 52 is formed, and a round bar portion 41 that is detachably fitted into the hole 7a. However, except that it has substantially the same length as the depth L of the hole 7a, it has the same configuration as the pin 30, and its front end surface 42 is attached to the end plate 7B (and 7A) when attached to the end plate 7B (and 7A). 7A) and substantially flush with the inner surface 7b.

  In order to form the boundary block 50 by the mold 1 having the above-described configuration, the mold body 10 in the mold open state (note: the pin 30 is attached to the end plate 7) and the four cores 20 are prepared. Then, the end plates 7A and 7B are rotated in the closing direction so that the upper end portion is opened in a small amount so that a part of the tip portion 32 of the pin 30 is located inside the end surface of the side plate 3. Therefore, in this example, the small opening stoppers 11 provided at four locations are used to rotate the tip 12b of the lever 12 in the direction of the arrow R as shown in FIG. It is assumed that it is on the state. This state is also indicated by a chain line in FIG. Then, the end plate 7 that tilts in the opening direction by its own weight is tilted until the outer edge of the end 7b of the end plate 12b of the lever 12 abuts on the outer edge of the rib 7c portion of the end plate 12 as shown in the example of the end plate 7A in FIG. A small opening state (for example, 10 mm) is established.

  Therefore, the core 20 is grasped by hand and inserted into the mold body 10 from above, and the base end surface portion 21 is lowered along the inner surface (molding space surface) 3a (see FIG. 5) of the side plate 3 and both ends. In FIG. 4, the lower side surface portion 23 is brought into contact with and supported by the tip end portion 32 of the pin, and similarly, the four cores 20 are brought into the above-described support state.

  Thereafter, when the end plate 7 is closed by a clamp (not shown) to make the mold closed, the core 20 is positioned at a predetermined recess formation position and is held in the mold body 10. Therefore, concrete is placed in the molding space of the mold body 10 in the closed state. At this time, as shown in FIG. 5, the core 20 is inserted in a wedge shape by its own weight between the inner surface 3 a of the side plate 3 and the pin 30. Even when the mold is vibrated as necessary, the core 20 is reliably held at the recess forming position.

  When the cast concrete is hardened, the end plates 7A and 7B are opened, the concrete molded product in which the core 20 is embedded is taken out of the mold body 10, and then the embedded core 20 is hit. If it is extracted from the concrete molded product, the boundary block 50 having the recess 52 that opens to the target side surface 51 can be obtained. Then, by opening the above-mentioned end plates 7A and 7B, the pins 30 integral with each end plate are pulled out from both ends of the above-mentioned concrete molded product, so that the concrete molded product can be taken out from the mold body 10 without any trouble. Therefore, it is not necessary to completely remove the core from the side plate using bolts (removal) as in the conventional mold 60 (see FIG. 11). In addition, although the recessed hole equivalent to the front-end | tip part 32 of the pin 30 is formed in the longitudinal direction both ends of the obtained product, the boundary block 50 does not cause any trouble. Then, when the boundary block 50 is lifted and / or moved, the concave hole can be used as a hooking hole to ensure reliable lifting and movement.

  And if the core 20 extracted from the concrete molded product is inserted and held in the mold body 10 in the mold open state according to the above procedure, it can be immediately used for molding of the next lot. The complicated manual work of attaching / detaching the core to / from the side plate with the bolt as in the conventional mold 60 is unnecessary, and the work of attaching the core 20 to the mold body 10 according to the above procedure is easy and short. That's it. Moreover, since the space for the core attaching / detaching work with bolts as in the prior art is not required on the outside of the side plate 3, a formwork such as the four-piece illustrated or the six-piece or the eight-piece or more as illustrated is provided. It can be configured to improve productivity.

  Further, when the boundary block having no recess 52 is manufactured using the above-described formwork 1, the pin 30 attached to the end plate 7 is removed, and the replacement pin 40 is replaced with the end plate 7B as shown in FIG. (And 7A), and concrete may be placed in the molding space of the mold body 10 closed with the core 20 removed. Since the front end surface 42 of the replacement pin 40 is substantially flush with the inner surface 7b of the end plate 7B (and 7A), it is possible to obtain a boundary block that does not have the recess 52 and has a flat appearance at both end surfaces in the longitudinal direction.

  In this way, the mold 1 can be used for molding two types of products with and without the recess 52, and the equipment cost is less than when two types of mold are prepared depending on the presence or absence of the recess 52. It is economical and requires less form storage space.

  The present invention is not limited to the above example. For example, as the pin 30 and the replacement pin 40, a pin having a base portion fixed to a flange plate is passed through a hole portion formed of a through hole provided in the end plate 7. The specific structure and shape of each part may be other than those described above, such as using a structure in which the flange plate part is screwed to the outside of the end plate 7.

  Further, as a support piece projecting on the inner surface of the end plate for supporting the lower surface portion 23 of the core 20, the upper surface is formed in a pin shape or along the lower side surface portion without using the pin 30 which is detachable from the end plate. It is good also as a structure which fixedly attached the square-piece-shaped support piece etc. which inclinedly arranged to the end plate by welding or screwing.

  Further, since the mold body 10 of the above example has the small opening stopper 11, the core 20 can be quickly and easily attached to the mold body 10, but a hook-type hook or the like can be used instead. Alternatively, the small opening stopper may be used, the small opening state may be maintained by using a mold closing clamp, or the core 20 may be inserted into the mold body 10 after the mold is closed. In the above example, the escape portion 25 that forms a concave surface is provided at the lower end portion of the upper side surface portion 22 of the core 20, but the escape portion 25 may not be provided.

  In the above example, a boundary block having a concave portion on one side surface is described as a manufacturing target. However, the present invention can be inclined by changing the number of cores, the arrangement position, the cross-sectional shape of the side plate, and the like. Those having concave portions having a mountain-shaped cross section on both side portions of the molded product, and a pedestrian boundary block 55 having an L-shaped cross section and having concave portions 56 and 57 as illustrated in FIG. 12, and side portions of U-shaped grooves It can be applied to molds and manufacturing methods for manufacturing various concrete products, such as those having the above-mentioned recesses. Further, the formwork may be other than the four pieces in the above example. For example, in the case of a large concrete product, the formwork may be one piece.

DESCRIPTION OF SYMBOLS 1 ... Formwork, 2 ... Bottom plate, 3 ... Side plate, 3a ... Inner surface, 4 ... Side plate, 6 ... Base frame, 7A ... End plate, 7B ... End plate, 7a ... Hole, 7b ... Inner surface, 9 ... Hinge part, 10 ... Type Frame body, 20 ... core, 21 ... proximal end surface portion, 22 ... upper side surface portion, 23 ... lower side surface portion, 24 ... top surface portion, 30 ... pin, 31 ... base portion, 32 ... distal end portion, 40 ... replacement pin, 42 ... tip surface, 50 ... boundary block, 51 ... side surface, 52 ... recess, 54 ... opening surface, 55 ... pedestrian road boundary block, 56 ... recess, 57 ... recess.

Claims (3)

A formwork for producing a concrete product having a recess that opens on the side surface over its entire length,
A bottom plate supported on a frame, side plates erected on both right and left side edges of the bottom plate, and a pair of end plates that are pivotally supported at lower ends at both front and rear ends of the frame and tiltable in the front-rear direction. An openable formwork body,
An upper side surface and a lower side surface of the recessed portion forming core that is detachably disposed in the mold body, and that are inclined upwardly following the base end surface portion for forming the opening surface of the recessed portion. A core having an inclined mountain-shaped cross-section formed by connecting the portions through a top surface portion,
A support piece for positioning the core by supporting the lower side portions of both ends of the core located at the recess forming position in the mold body, projecting from the inner surface of each of the end plates,
The core is held at a predetermined recess forming position by supporting the lower side surfaces of both ends of the core with the base end surface abutted along the inner surface of the side plate by the support pieces. A formwork for producing concrete products characterized by the above. The form for manufacturing concrete products according to claim 1, wherein the support piece is detachably attached to the end plate with a tip portion protruding from an inner surface of the end plate and a base portion fitted into a hole provided in the end plate. a pin, which is provided further replacement pin short of the distal end surface fitted into the hole portion when the pin is removed from said end plate is substantially flush with the inner surface of the end plate, together with said pin features and to Turkey Nkurito product manufacturing mold that.
Using the concrete product manufacturing form according to claim 1 or 2,
The core is held at a predetermined recess forming position by supporting the lower side surfaces of both ends of the core with the base end surface abutted along the inner surface of the side plate by the support pieces. And put concrete in the molding space of the mold body in the mold closed state,
Open the both end plates after hardening of the cast concrete, take out the concrete molded product in which the core is embedded from the formwork body,
A method for producing a concrete product, wherein the core is extracted from the concrete molded product after the removal.

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