JPH08193416A - Concrete mold - Google Patents

Abstract

PURPOSE: To provide a concrete mold which is low in weight, high in side sash bar strength, and less in the number of part items. CONSTITUTION: An upper sash bar 12 and a lower sash bar 13 are bent and formed on both upper and lower edges at the rear of a thin steel sheet surface plate 11 integrally with the surface plate 11. Also side sash bars 14 and 15 are bent and formed at both right and left edges integrally with the surface plate 11, and an angle part at its end edge is fused to the rear surface of the surface plate 11. Then, inside the side sash bars 14 and 15, a space is formed. In addition, space holding projections 14a and 15a are installed projectedly on the inner side of the side plates 14c and 15c of the side sash bars 14 and 15, and made in contact with the inner surfaces of the opposed side plates 14d and 15d.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete formwork for forming a basic concrete for a house, for example.

[0002]

2. Description of the Related Art A concrete formwork of this type is disclosed in, for example, Japanese Utility Model Publication No. 56-6594.
The mold frame of this publication has a connecting hole at one end of the face plate, and a flat plate-shaped side rail thicker than the face plate is welded. On the other side end, a side rail having two angled faces thicker than the face plate and having connection holes is welded.

[0003]

However, in the above-mentioned conventional formwork, the side rail is formed of a flat plate or an angle thicker than the face plate for maintaining strength, and the formwork becomes heavy, so that the handling is difficult. It's inconvenient. Further, since the side rail is simply a single plate, there is a problem that when a large load is applied to the side rail, the side rail easily tilts with respect to the face plate.

The present invention has been made by paying attention to the problems existing in such conventional techniques. An object of the invention is to provide a concrete formwork which is lightweight, has a high strength of a side rail, and is convenient for assembling.

[0005]

In order to achieve the above object, in the invention of claim 1, the side rail has a hollow structure, and means for holding the space is provided.

According to the second aspect of the present invention, as a means for holding the space, at least one of the pair of side plates forming the side rail is provided with a protrusion that abuts the other side plate.
In the invention of claim 3, the angle portion formed on the side plate is fixed to the back surface of the face plate.

According to the invention of claim 4, a reinforcing rib is provided between the side plate and the angle portion.

[0008]

According to the invention of claim 1, the side rail is formed in a hollow structure. For this reason, the side rail is lightened, and the side rail is supported at two positions with respect to the face plate, which makes it difficult to bend. Further, the side rail is provided with a means for holding the space, so that the side rail is not deformed when the connecting metal fitting is clamped.

According to the invention of claim 2, the deformation of the side plate of the side rail is prevented. In addition, the protrusion also acts as a reinforcement for the side plate itself. According to the invention of claim 3, the angle portion increases the strength of the side rail.

According to the invention of claim 4, the side rail is firmly fixed to the face plate by utilizing the angle portion.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A first embodiment of the present invention will be described below with reference to FIGS.
A description will be given based on FIG. As shown in FIGS. 1 to 5, the concrete formwork has a face plate 11 made of a thin steel plate whose surface is a concrete forming surface, and the web 1 is provided on both upper and lower edges thereof.
Lateral L consisting of 2a, 13a and ribs 12b, 13b
An upper bar 12 and a lower bar 13, which are shaped like a letter, are bent and formed. The ends of the ribs 12b and 13b are folded back 180 degrees and are in contact with the inner surfaces of the webs 12a and 13a.

On both left and right edges of the face plate 11, side rails 14 and 15 are provided.
Are formed integrally with the face plate 11. The side rails 14 and 15 are bent and formed in a flat rectangular pipe shape. 14c, 14
Reference numerals d, 15c, and 15d denote a pair of side plates forming the side rails 14 and 15, respectively. Angle portions 18 are formed on the inner side plates 14c and 15c, and the angle portions 18 are joined to the back surface of the face plate 11 by spot welding. Side rail 14, 1
A plurality of reinforcing ribs 14b and 15b having a triangular cross section are formed at predetermined intervals at the bent portion between the angle portion 18 of 5 and the side plates 14c and 15c.

Inside the side rails 14 and 15, the side rail 1 is
A space is formed by 4, 5 and the back surface of the face plate 11. The inner side plates 14c and 15c include the outer side plate 14c.
space holding projections 14a, 15 in the direction of d, 15d
a is provided so as to project at a plurality of predetermined intervals. The space holding protrusions 14a and 15a are opposite side plates 14d and 15d.
Is abutted on the inner surface of.

Further, connecting elongated holes 16a and 17a are provided at the upper and lower ends of the side rails 14 and 15, respectively. Further, between the upper and lower connecting elongated holes 16a and 17a, connecting holes 16b and 17b are provided at a plurality of upper and lower positions on the side rails 14 and 15.
Is transparently installed.

On the back surface of the face plate 11, close to the side rail 14,
In addition, the support hole 20a is provided at a position facing the connection hole 16b.
A plurality of supporting metal fittings 20 having the above are fixed by welding. A connecting clamp 21 for connecting another concrete formwork disposed adjacently is rotatably and slidably supported between the side rail 14 and the support fitting 20. Connection clamp 2
Reference numeral 1 is a cylindrical shape and has connection holes 16b and 17b and a support hole 2
Connecting piece 21a inserted through 0a and adjacent side rail 14,
It is composed of a clamp piece 21b for clamping 15.

On the back surface of the face plate 11, a plurality of reinforcing ribs 23 formed by bending a thin steel plate into a substantially channel shape are bonded and fixed. According to the present embodiment configured as described above, since the side rails 14 and 15 are formed integrally with the face plate 11, the number of parts is reduced. Moreover, the side rail 1
4, 15 are side plates 14c, 14d, so as to form a hollow structure.
15c and 15d are separated from each other, and the end angle portion 18 is fixed to the back surface of the face plate 11. Therefore, the side rail 1
The weights of the members 4 and 15 are reduced, and the members 4 and 15 are fixed to the face plate 11 at two positions separated from each other, so that a strong structure that does not easily bend due to an external force is obtained.

Moreover, one side plate 14 of the side rails 14, 15
c, 15c integrally formed with space holding projections 14a, 15a
Receives the other side plate 14d, 15d, the side bars 14, 15 are not deformed in the flat direction when the side bars 14, 15 are clamped by the connecting clamp 21, and the space holding projection 14a, 15a also increases the strength of the side plates 14c, 15c themselves.

Further, the angle portion 18 where stress is easily concentrated
Since the reinforcing ribs 14b and 15b are provided on the side wall, deformation of the side rails 14 and 15 at the angle portion 18 can be prevented.

In addition, on the back surface of the face plate 11, a connection clamp 21 and a support fitting 20 for connecting the adjacently arranged molds are mounted. Therefore, it is convenient because it is not necessary to prepare a separate connecting fitting when assembling the mold.

[0020]

[Another embodiment] Another embodiment of the present invention will be described below.
The description will focus on the parts that are different from the first embodiment. (Second Embodiment) In the second embodiment, as shown in FIGS. 6 to 10, the ribs 31b and 32 of the upper rail 31 and the lower rail 32 are provided.
The end portion of b is extended along the webs 31a and 32a and is in contact with the back surface of the face plate 11. In addition, the side rails 33, 34
Is a member separate from the face plate, and the side plates 33d and 34d
The end portion and the angle portion 18 are welded to the back surface of the face plate 11. Further, as the space portion holding means for the side rails 33, 34, a plurality of conical space holding projections 33a, 34a are provided at predetermined intervals on the side plates 33c, 34c of the side rails 33, 34, respectively. There is. The space holding protrusions 33a, 3
The apex of 4a is in contact with the inner surfaces of the other side plates 33d and 34d.

With this structure, the number of bent portions of the face plate 11 can be reduced. (Third Embodiment) In the third embodiment, FIGS.
As shown in FIG. 2, one lateral end of the face plate 11 is bent at a right angle to form a lateral face plate 41. The end portion is further bent at a right angle to form a side rail 42. The structure of the side rail 42 is the same as that of the first embodiment.

According to this structure, as shown by the chain double-dashed line, another form 43 is connected so as to be continuous with the lateral plate 41, and a concrete molding surface bent at a right angle can be formed. (Fourth Embodiment) In the fourth embodiment, as shown in FIG. 13, the molds are composed of separate parent mold 51 and child mold 52. An opening 53 is formed at one side end of the parent mold 51. In the opening 53, a child form 52 having a size slightly smaller than that of the parent form 51 is slidably and disengageably fitted. Also, the child formwork 5
2 is configured to be insertable into the opening 53 in either the side rail 14 side or the side rail 42 side.

According to this construction, the mold can be expanded and contracted in accordance with the required length of concrete to be cast. (Fifth Embodiment) In the fifth embodiment, as shown in FIG. 14, a face plate 61 is formed in a U-shaped cross section, and side bars 62 and 63 are bent at right angles at both ends thereof. There is.

According to this structure, as shown by the chain double-dashed line, the pair of other molds 64 can be arranged in parallel with the concrete molding surfaces thereof facing each other by the mold of this embodiment. The ends can be formed. (Sixth Embodiment) In the sixth embodiment, as shown in FIG. 15, a face plate 71 is formed to have an angled cross section, and side bars 72 and 73 are bent at right angles at both ends thereof.

According to this structure, as shown by the chain double-dashed line, a pair of other molds 74 are arranged at a right angle by the mold of this embodiment to form a concrete molding surface bent at a right angle. can do. (Seventh Embodiment) In the seventh embodiment, as shown in FIG. 16, the steel pipe receiving metal fitting 8 for holding the steel pipe 90 for preventing the bending of the formwork connecting portion by utilizing the connecting holes 16b and 17b.
1 is provided. The steel pipe receiving fitting 81 is formed by bending an integral metal plate, and has first and second sandwiching pieces 82, 8
3 and a bridge piece 84 for bridging between the sandwiching pieces 82 and 83. In FIG. 16, a connecting piece 85, which has a semi-cylindrical shape and is inserted into the connecting holes 16b and 17b, is provided at an upper portion of one end of the first sandwiching piece 82. First sandwiching piece 8
A first sandwiching piece 86 is formed at one end of 2. A second holding piece 87 is formed on the second holding piece 83 in a direction parallel to the first holding piece 86. Both clamping pieces 86, 87
Thus, the side rails 14 and 15 are clamped. First sandwiching piece 82
A contact piece 88 that contacts the back surface of the side crosspieces 14 and 15 is formed on the. The first sandwiching piece 82 and the second sandwiching piece 8
A steel pipe holding piece 89 having a U-shaped cross section is provided at the other end of the protrusion 3.

According to this structure, the connecting piece 85 is inserted into the connecting holes 16b, 17b of the adjacent molds, and the adjacent side rails 14, 15 have the first holding piece 86 and the second holding piece 87. And the contact pieces 88 are brought into contact with the rear surfaces of the side rails 14 and 15 to connect the adjacent molds. Then, the steel pipe 90 is sandwiched between the rear surfaces of the side rails 14 and 15 and the steel pipe sandwiching piece 89, and the bending of the connecting portion of the mold is prevented.

The present invention can be modified and embodied as follows. (1) Omit the connecting clamp 21 and the support fitting 20. (2) Attach the connecting clamp 21 and the support fitting 20 to both ends of the face plate 11. (3) Instead of the connection clamp 21 and the support fitting 20, a connection fitting made up of a pin and a U-shaped holding tool, and a support fitting corresponding thereto are attached. (4) The number of the connecting holes 16b and 17b and the connecting fittings 20 and 21 should be different from those in the above-described embodiments. (5) Adopt the structures of the side rails 14, 15, 33, and 34 shown in FIGS. 4 and 9 as the configurations of the respective embodiments. (6) Upper rails 12, 31 and lower rail 1 shown in FIGS.
The structures of 3 and 32 are adopted as the configurations of the respective embodiments. (7) Both side plates 14 of the side rails 14, 15, 33, 34
c, 14d, 15c, 15d, 33c, 33d, 34
c and 34d, the space holding means 14a, 15a, 33a, 3
Provide 4a.

Next, technical ideas other than the claims grasped by the above embodiments will be described. (1) In any one of claims 1 to 3, the side rails 14, 1
A concrete formwork in which 5 is formed integrally with the face plate 11 by bending.

With this structure, the number of parts can be reduced, which is advantageous in manufacturing. (2) In any one of claims 1 to 3, the side rail 3 is a separate body.
A concrete formwork in which 3, 34 are welded to the back surface of the face plate 11.

With this structure, it is possible to reduce the number of bent portions and facilitate manufacturing. (3) In any one of claims 1 to 3, the upper and lower crosspieces 1
2, 13, 31, 32 are formed integrally with the face plate 11 by bending.
Folding the edges, upper and lower bars 12, 13, 31, 3
A concrete formwork that is in contact with the back surface of 2 or the back surface of the face plate 11.

With such a structure, it is easy to hold when transporting the mold, and the square upper and lower crosspieces 12, 13, 3 are held.
It is safe because the edges of 1 and 32 are not exposed.

[0032]

As described above in detail, the present invention has the following excellent effects. According to the first aspect of the present invention, the side rail is made lighter in weight and has a structure that is difficult to bend.
Further, the side rails are not deformed when the connecting fittings are clamped.

According to the invention of claim 2, the deformation of the side plate of the side rail is prevented. According to the invention of claim 3, the angle portion increases the strength of the side rail. According to the invention of claim 4, the side rail is firmly fixed to the face plate by utilizing the angle portion.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing a mold according to a first embodiment.

FIG. 2 is a partially enlarged perspective view showing a side rail of FIG.

FIG. 3 is a sectional view taken along line 1-1 of FIG.

4 is a sectional view taken along line 2-2 of FIG.

5 is an end view taken along line 3-3 of FIG.

FIG. 6 is a partially cutaway perspective view showing a mold of a second embodiment.

7 is a partially enlarged perspective view showing the side rail of FIG.

8 is a sectional view taken along line 4-4 of FIG.

9 is a sectional view taken along line 5-5 of FIG.

10 is an end view taken along line 6-6 of FIG.

FIG. 11 is a partially cutaway perspective view showing a mold of a third embodiment.

12 is a sectional view taken along line 7-7 of FIG.

FIG. 13 is a partially cutaway perspective view showing a mold of a fourth embodiment.

FIG. 14 is a perspective view showing a mold of a fifth embodiment.

FIG. 15 is a perspective view showing a mold of a sixth embodiment.

16A is a partial cross-sectional view of the main part of the mold of the seventh embodiment as seen from the left side surface side, FIG. 16B is a partial cross-sectional view of the same as the right side surface side, and FIG. The line part end view.

[Explanation of symbols]

11, 61, 71 ... Face plate, 14, 15, 33, 34, 4
2, 62, 63, 72, 73 ... Side rails, 14a, 15a ...
Space holding projections as means for holding the space portion, 14b,
15b ... Reinforcing ribs, 14c, 14d, 15c, 15d,
33c, 33d, 34c, 34d ... Side plate, 18 ... Angle portion, 33a, 34a ... Space holding projection as means for holding the space portion.

Claims (4)

[Claims] 1. A face plate for molding concrete,
A concrete formwork having a side rail, wherein the side rail has a hollow structure, and means for holding the space is provided. 2. The concrete formwork according to claim 1, wherein at least one of the pair of side plates forming the side rail is provided with a protrusion that comes into contact with the other side plate, as means for holding the space. 3. The concrete formwork according to claim 2, wherein the angle portion formed on the side plate is fixed to the back surface of the face plate. 4. The concrete formwork according to claim 3, wherein a reinforcing rib is provided between the side plate and the angle portion.