JP4291959B2 - Concrete formwork spacing retainer and its packing structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a concrete formwork spacing holder used when placing fabric foundation concrete for housing.
[0002]
[Prior art]
In a conventional concrete formwork spacing holder, the left and right outer regulation pieces and inner regulation pieces that form a mold fitting portion for holding two concrete molds at predetermined intervals are provided on the left and right sides. A bendable part formed by a cut-out hole, notch, notch, concave line, etc. in the middle part of the rise and a fingertip part wider than that at the top, and press the fingernail part with the fingertip when using it. It is bent and locked to the mold (see, for example, Japanese Utility Model Publication No. 61-34457).
[0003]
[Problems to be solved by the invention]
In the conventional spacing holder, the outer restricting piece and the inner restricting piece are projected upward from both sides of the main body, so they cannot be aligned and overlapped. The form of packing and transporting is common. Therefore, the distance holders are entangled with each other by vibration or impact during transportation, which brings about an unfavorable result in which it is difficult to take out. In order to solve this problem, it is necessary to spread the space holders in the corrugated cardboard box and place the cardboard etc. on the cardboard box. A large amount of packaging material waste will be generated. Although cardboard is a recyclable packaging material, it is often exposed to long-term outdoor exposure at the construction site, and the cardboard once wet is difficult to reuse and must be disposed of. In addition, it is conceivable to use a resin that can be reused, but there is a problem that a large amount of cost is required for collection.
[0004]
For this reason, it is possible to save packaging by connecting about 10 spacers in the width direction via a connecting part that can be folded like a staple, making them one piece, making it easy to bundle and preventing collapse of the load. A spacing holder has also been proposed (Japanese Utility Model Publication No. 57-178654). However, in order to use this spacing holder, there is a troublesome work for an operator to bend the connecting portion between the spacing holders by bending it several times to cause metal fatigue. In addition, once separated, the individual gaps are separated, which causes the same problem as described above that the remaining space holders that are not used are bulky and entangled when transported or stored.
[0005]
An object of the present invention is to reduce a large amount of packing material waste generated when a house is constructed, and further to provide an interval holder that improves transport and storage efficiency by reducing the packing volume and is excellent in handling. It is for the purpose.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the spacing holder of the present invention has an outer regulation piece and an inner regulation piece that form a mold fitting portion that holds two concrete molds at a predetermined distance on the left and right. in the outer regulating piece of the upper to the bent portion and the pressing portion and the locking piece provided with concrete form spacing holders of consisting of an upper portion, when stacked together spacing holder vertically, under the spacing retainers The locking piece is in a state where it is bent and opened outward from the bent portion so that it can be press-fitted between the opposing surfaces of the outer regulating pieces of the upper spacing holder , and the pressing portion of the lower spacing holder is with a structure for holding in contact with the outer restricting piece of spacing members, as the distal end portion of the outer regulating piece of the lower interval retainer supported in contact with the bottom of the gap retainer upward, the support state between the abutment face portion of the in the upper space retainer and the lower gap retainer Is provided with a concave and convex engaging portion for regulating the lateral displacement fits with each other.
[0007]
The locking piece is set to have an inner dimension slightly smaller than the outer dimension of the outer regulating piece, and when the spacing holders are stacked, the locking piece of the lower spacing holder is set to the outer regulation of the upper spacing holder. It is effective to adopt a structure that abuts and holds the piece.
[0008]
Further, the concave / convex fitting portion is provided between the abutting facing portion between the outer regulation piece tip of the lower spacing holder and the bottom of the upper spacing holder, or between the pressing portion of the lower spacing holder and the upper spacing. It is preferable to provide it between the contact | abutting opposing parts with the outer side control piece of a tool . Or it can also be provided between the opposing site | parts of the inner side regulation piece front- end | tip of a lower space | interval holder, and the bottom part of an upper space | interval holder.
[0009]
The interval holder configured as described above is formed by the sandwiching between the outer regulating pieces of the upper interval holder and the uneven fitting portion that regulates mutual lateral displacement between the locking pieces of the lower interval holder. It is possible to stack the interval holders in a state where the positional deviation is restricted. Therefore, the spacing holders can be stacked in a stable state, and even when a plurality of stacked stacks are bundled by a binding band or the like, there is no worry about collapse of the load, and it is possible to reduce packing material waste. In addition, the gap holders can be stacked in a state where they are partially overlapped in the upper and lower directions, and the transport and storage efficiency is improved by improving the handling capacity by reducing the packing volume. In addition, stacking of interval holders is facilitated and packing work is saved, and the interval holders do not get entangled during transportation and do not need to be broken during use, so they are used immediately after unpacking. be able to. And even after once unpacking, it can be stably stacked in a partially polymerized state again.
[0010]
When the inner dimension of the locking piece is set to be slightly smaller than the outer dimension of the outer regulating piece, and the spacing holders are stacked, the locking piece of the lower spacing holder is the outer regulating piece of the upper spacing holder. If it is configured to bend outward from the bent portion by press-fitting between, the outer regulating pieces of the upper spacing holder are sandwiched between the locking pieces of the lower spacing holder, and the stacked spacing holders are vertically The handling is further improved by preventing separation. If it does in this way, since contact of an overlap part is few and it can be made to isolate | separate easily with slight force, construction property will not be inhibited. As a result, the packing unit in which a plurality of sets of the vertical stacking units of the spacing holders are arranged in parallel in the lateral direction is simply fixed with two or three binding bands in the longitudinal direction of the spacing holder. A simple packaging structure was realized.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the invention will be described with reference to the drawings based on examples. FIG. 1 is a perspective view showing a structure and a stacked state of a spacing holder of the present invention, FIG. 2 is a plan view, FIG. 3 is a front view, and FIG. 4 is an enlarged side view. It has the outer side regulation piece 2 and the inner side regulation piece 3 which form the mold fitting part 1 which hold | maintains two concrete mold frames at a predetermined space | interval, and the bending part 4a and its upper part on the outer side regulation piece 2 The latching piece 4 which consists of an upper pressing part 4b is provided. The outer regulation piece 2 is formed by bending both ends of a strip-shaped plate material upward, and the inner regulation piece 3 is formed by cutting upward at an inward position spaced apart from each outer regulation piece 2, In this example, a thin plate (plate thickness of about 1 mm) such as a galvanized steel plate or a stainless steel plate is used, so that the entire spacing retainer has rigidity to withstand the concrete placing pressure, and from the outer regulation piece 2 at one end to the outside at the other end. Both ends in the width (short side) direction are bent downward to form the reinforcing rib 5 over the entire length up to the restricting piece 2, and the tip is further folded sideways to form a horizontal flange 6. A reinforcing bead 7 is pressed over the entire length of the mold fitting portion 1 including the outer restricting piece 2 and the inner restricting piece 3, and at the same time, bead grooves 2b and 2b are formed on both sides thereof. The part of the mold fitting portion 1 to which force is applied is reinforced.
[0012]
As shown in FIG. 4, the locking piece 4 has a structure in which both side portions of the cutout hole provided in the rising intermediate portion of the outer regulating piece 2 are bent portions 4a and the upper portion is a pressing portion 4b. As shown by the middle two-dot chain line, when the pressing part 4b is pressed with a finger toward the mold 20 fitted to the mold fitting part 1, it is bent in the direction of the arrow at the bent part 4a. The locking piece 4 is in the locked state on the lower rail portion 20 of the knives 20, but the notch 4c from the inside is provided at the lower end of the bent portion 4a so that the bending work at this time can be performed easily and reliably. To concentrate. The locking piece 4 only needs to have a structure that can be bent and locked with a finger to the formwork, such as notching the rising intermediate portion of the outer regulating piece 2 from both sides and providing only one bent portion 4a at the center in the width direction. .
[0013]
FIG. 5 is a side view showing the stacked state of the interval holders according to the present invention, and FIG. 6 is a longitudinal sectional view taken along the line AA in FIG. 5, but when another interval holder is stacked on the interval holder, As shown in FIG. 6, the locking piece 4 of the lower spacing holder is folded open from the bent portion 4a so that the space between the outer regulating pieces 2 of the upper spacing holder can be inserted between the opposing surfaces. It becomes a state. In this example, when the opening state of the locking pieces 4 is set to be small before the stacking, and the distance holding tool indicated by the two-dot chain line in FIG. 6 is lowered from above, the locking pieces 4 of the lower space holding tool. The upper end of the pressing portion 4b abuts and is guided by the bent portion of the outer regulating piece 2 having a relatively large bending radius so that the locking piece 4 tilts outward. At this time, the pressing portion 4b has a shape in which the central portion is recessed one step inward so that the pressing portion 4b can be easily inserted by being in contact with a bent portion of the reinforcing bead 7 formed on the upper outer regulating piece 2 in an inclined state. In addition, it also acts to prevent the fingertip from shifting when the pressing portion 4b is pressed. When stacked in this manner, the lower edge portion of the pressing portion 4b is in a state of being pressed against and sandwiched by the outer surface of the reinforcing bead 7 provided on the outer regulating piece 2 of the upper spacing holder. In addition to the above, it demonstrates the effect of preventing vertical slipping.
[0014]
Further, in this example, the projecting portion 2a is formed by extending the mold contact surface of the outer regulating piece 2 upward, and this is formed between the reinforcing rib 5 and the reinforcing bead 7 of the upper spacing holder. The bead grooves 2b and 2b are projected into concave and convex fitting portions, and the reinforcing ribs 5 restrict the positions of the outer surfaces of the convex portions 2a so as to prevent a lateral shift between the spacing holders. At this time, the tip of the convex portion 2a is supported in contact with the bead grooves 2b, 2b of the upper spacing holder, that is, the back surface of the mold contact surface.
[0015]
7 is an enlarged view of a portion B in FIG. 3, and FIG. 8 is a cross-sectional view taken along the line CC in FIG. 7. In this example, it is along the bent portion of the outer regulating piece 2 where the stress accompanying the placement of concrete is concentrated. Further, an end portion reinforcing rib 8 having a shape in which the tip end of the flange 6 is bent by about 90 ° is provided and reinforced. As shown in FIG. 8, the outer regulating piece 2 has a concavo-convex cross-sectional shape in which reinforcing ribs 5, reinforcing beads 7, and bead grooves 2b, 2b on both sides thereof are formed. As shown in FIG. The material is compressed at the innermost surface portion of the bent portion of the material, and the length is reduced to L1, and at the outermost surface portion, the material is pulled to extend the length to L2, and the extension is also reduced in the middle. There is a neutral plane (which passes through the center of gravity of the cross-sectional shape) that has a short length L. Therefore, in the end portion reinforcing rib 8 of this example, the end portion of the end portion reinforcing rib 8 that is easily affected by expansion and contraction is set to be positioned near the neutral surface so that cracks and wrinkles do not occur. ing. Therefore, since the moldability is improved and the drawing depth of the reinforcing beads 7 and the end reinforcing ribs 8 can be increased, it is possible to reduce the cost by using a thin plate material.
[0016]
FIG. 9 is a perspective view showing a packing state. However, according to the spacing holder of the present invention, for example, the following packing form is preferable. First, 10 interval holders are stacked upward, then 10 sets are arranged horizontally as a set, and finally, a binding band 9 made of a PP band or the like is hung around the part of the mold fitting portion 1 at both ends. A total of 100 interval holders are shipped as a packing unit. Even with such simple packaging, there is no worry about collapse of the cargo, and the packaging material waste generated at the construction site can be drastically reduced without the need for packaging in a cardboard box or the like. Even if the boxes are packed in a cardboard box or the like, it is not necessary to provide the partition cardboard that has been necessary every time one layer is stacked, and this alone can provide a sufficient reduction effect. Moreover, the thing of the form which covered only the upper surface and the lower surface with the packing material which consists of resin or a corrugated cardboard may be sufficient.
[0017]
FIG. 10 is a perspective view showing another shape example of the gap holder of the present invention and its stacked state, FIG. 11 is a side view showing the stacked state, FIG. 12 is a longitudinal sectional view taken along DD in FIG. FIG. 13 is an EE enlarged cut end sectional view in FIG. 12. FIG. 14 is an FF enlarged cut end view in FIG. 11, but as shown in FIG. 10, the spacing holder of this example is the same as in the previous embodiment, the outer regulating piece 2, the inner regulating piece 3, the locking The piece 4, the reinforcing rib 5, the flange 6, the reinforcing bead 7, and the end reinforcing rib 8 are formed in the same manner, and when another interval holder is stacked on the interval holder as shown in FIG. The bottom portions of the bead grooves 2b, 2b, which are the mold contact surfaces of the outer restricting piece 2, are extended upward to provide a convex portion 2a between the reinforcing rib 5 and the reinforcing bead 7 of the upper spacing holder. The bead grooves 2b and 2b are inserted into the bead grooves 2b and 2b, and the side surfaces of the convex portions 2a are regulated by the reinforcing ribs 5 so as to prevent the gap holders from shifting in the lateral direction. The structure in which the tip is in contact with and supported by the back surface of the upper spacing holder is the same as the above-described example.
[0018]
Similarly, when the bent portion 4a is bent outward from the notch 4c so that the interval holders can be stacked, the locking piece 4 interferes with the outer regulating piece 2 of the upper interval holder. However, in this example, when the distance holders are stacked, the pressing portion 4b is bent once inward above the notch 4c so that the pressing portion 4b is substantially parallel to the outer regulating piece 2. Yes. Therefore, when the upper gap holder is press-fitted and stacked after the locking pieces 4 are narrowed so that the pressing portions 4b are slightly inclined inward in the state before stacking, the pressing portion 4b is pushed by the upper gap holder. The reinforcing bead 7 provided on the outer restricting piece 2 is pressed against and sandwiched between the portions, and in addition to restricting the position in the longitudinal direction, the effect of preventing vertical slippage is exhibited.
[0019]
In addition to the convex portion 2a of the outer regulating piece 2 described above, a plurality of concave and convex fitting portions of this example are provided. As shown in FIG. 12, the tip of the inner regulating piece 3 is extended upward and bent inward. The bent portion 3a is formed into an uneven fitting portion by fitting it into a cut-and-raised window 3b generated when the inner regulating piece 3 of the upper spacing holder is cut and raised outward. Since the bent portion 3a only needs to regulate the displacement in the width direction, a gap is provided between the bent portion 3a and the inner regulating piece 3 of the upper spacing holder to facilitate insertion into the window 3b. FIG. 13 is an EE enlarged cut end view of FIG. 12, in which the front end bent portion 3a of the inner regulating piece 3 is cut and raised and fitted into the window 3b, and the upper and lower spacing holders are regulated to shift left and right. The state of becoming clearly appears.
[0020]
Further, as seen in FIG. 14, the two protruding ridges 4 d extending in the vertical direction may be formed to protrude inward in the pressing portion 4 b of the locking piece 4. In this case, in the stacked state of the interval holders, this is inserted into the bead grooves 2b, 2b formed between the reinforcing rib 5 and the reinforcing bead 7 of the outer regulating piece 2, and between the two ridges 4d. A reinforcing bead 7 is inserted into the formed concave groove to form an uneven fitting portion. The concave / convex fitting portion functions as long as one means is provided on each of the right and left sides of the spacing holder, but is more difficult to shift and reliable by combining a plurality as in this example.
[0021]
【The invention's effect】
Since the present invention is configured as described above, the concave-convex fitting portion that regulates the pinching between the outer regulating pieces of the upper spacing holder and the mutual lateral displacement between the locking pieces of the lower spacing holder, and Thus, the interval holders can be stacked in a state in which mutual displacement is regulated. Therefore, the spacing holders can be stacked in a stable state, and even when a plurality of stacked stacks are bundled by a binding band or the like, there is no worry about collapse of the load, and it is possible to reduce packing material waste. In addition, the gap holders can be stacked in a state where they are partially overlapped in the upper and lower directions, and the transport and storage efficiency is improved by improving the handling capacity by reducing the packing volume. In addition, stacking of interval holders is facilitated and packing work is saved, and the interval holders do not get entangled during transportation and do not need to be broken during use, so they are used immediately after unpacking. be able to. And even after once unpacking, it can be stably stacked in a partially polymerized state again.
[0022]
In addition, when the inner dimension of the locking piece is set slightly smaller than the outer dimension of the outer regulating piece, and the interval holders are stacked, the lower holding piece of the lower holding piece becomes the outer regulating piece of the upper interval holding piece. If it is configured to bend outward from the bent portion by press-fitting between, the outer regulating pieces of the upper spacing holder are sandwiched between the locking pieces of the lower spacing holder, and the stacked spacing holders are vertically The handling is further improved by preventing separation. Since it can be easily separated with a slight force, the workability is not hindered.
[Brief description of the drawings]
FIG. 1 is a perspective view of a shape of a gap holder and a stacked state thereof.
FIG. 2 is a plan view of an interval holder.
FIG. 3 is a front view of an interval holder.
FIG. 4 is an enlarged side view of an interval holder.
FIG. 5 is a side view showing a stacked state of the interval holders.
6 is a cross-sectional view taken along the line AA in FIG.
FIG. 7 is an enlarged view of a portion B in FIG.
8 is a cross-sectional view taken along the line CC in FIG.
FIG. 9 is a perspective view illustrating a packaged state of the interval holder.
FIG. 10 is a perspective view showing another example of a distance holder.
FIG. 11 is a side view showing a polymerization state of another example of the interval holder.
12 is a cross-sectional view taken along the line DD in FIG. 11. FIG.
13 is an enlarged cross-sectional view taken along line EE in FIG. 12 showing a fitting state of the inner regulating piece.
14 is an end view taken along the line FF in FIG. 11. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Formwork fitting part 2 Outer side regulation piece 2a Protrusion part 2b Bead groove 3 Inner regulation piece 3a Bending part 3b Cut-and-raising window 4 Locking piece 4a Bending part 4b Pressing part 4c Notch 4d Projection 5 Reinforcement rib 6 Flange 7 Reinforcement Bead 8 End reinforcing rib 9 Cable tie 11 Lower rail 20 Mold

Claims (4)

Has outer regulating piece forming the mold fitting portion (1) for holding the two concrete formwork at a predetermined interval (2) and the inner restricting piece (3) in the longitudinal direction left and right, outer restricting piece (2 In a concrete formwork spacing holder provided with a locking piece (4) consisting of a bent part (4a) and a pressing part (4b) on the upper part thereof ) ,
When the interval holders are stacked one above the other,
Locking pieces distance retainer of the lower (4) is press-fit can be bent between the facing surfaces of the engaging pieces of the upper outer restricting piece of spacing members (2) between the lower distance holder (4) A structure in which the pressing portion (4b) of the lower spacing holder is held in contact with the outer regulating piece (2) of the upper spacing holder in a state of being bent outward from the section (4a). With
The tip of the outer regulating piece (2) of the lower spacing holder is in contact with and supported by the bottom of the upper spacing holder,
A gap between the concrete molds, which is provided with a concave and convex fitting portion that is fitted between the abutting facing portions of the upper gap holder and the lower gap holder in the supporting state to restrict lateral displacement. Retaining tool. 2. The concrete formwork according to claim 1, wherein the concave-convex fitting portion has a structure provided between the abutting facing portions of the outer regulation piece (2) of the lower spacing holder and the bottom of the upper spacing holder. Spacing retainer. 2. The concrete mold according to claim 1, wherein the concave-convex fitting portion has a structure provided between abutting and opposing portions of the pressing portion (4b) of the lower spacing holder and the outer regulating piece (2) of the upper spacing holder. Frame spacing holder. A structure in which a plurality of the interval holders according to claim 1 are held by the concave and convex fitting portions by the pressing portion (4b) of the lower interval holder abutting on the outer regulating piece (2) of the upper interval holder. a vertical stacking unit, and the concrete form of the plurality of sets is fixed with 2 or strap of three positions relative to the longitudinal direction of the interval holder parallel arranged packed unit in the transverse direction (9) Packing structure for interval holder.

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