JP2010101039A - Form for laying concrete - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a form for laying concrete which can keep cost low by more easily performing the operation of mounting a rail for making a laying machine travel than ever. <P>SOLUTION: The form for laying the concrete includes: an abutting surface 1 abutting on the concrete; a supporting portion 2 which is elongated to the backside of the abutting surface 1 and fixed to a base course so as to support the abutting surface 1 from the backside; and a plurality of rod-like members 3 which are erected in line in the direction of the elongation of the abutting surface 1 on the top surface of the supporting portion. A predetermined spacing is set between the abutting surface 1 and the rod-like member 3, so that the rail 4 can be held between the abutting surface 1 and the rod-like member 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a formwork used when laying concrete.

  When laying concrete pavements such as roads and parking lots, formwork is installed on both sides of the pavement width, and concrete is placed in the formwork. In this concrete laying form, as shown in Patent Document 1, there is a type provided with rails similar to railways for running a laying machine such as a concrete finishing machine. That is, the formwork is extended along the contact surface portion with concrete and the back side of the contact surface portion (the side opposite to the concrete placement side), which is erected along both sides of the pavement width. And a support portion that is supported from the back side so that the contact surface portion is not displaced, and the rail is mounted on the support portion. Such a rail is made of iron and is mounted on the support portion by a dedicated rail press (see page 9, etc. of Patent Document 1).

Japanese Utility Model Publication No. 61-093504

  The above rail is installed on site after the formwork is installed according to the pavement shape. In the installation work, it is lifted by the crane to the mounting part on the support part of the formwork, and it is not moved by the rail presser Install firmly. Accordingly, the rail is mounted at a time for the entire length of the distance traveled by the laying machine in the mounting operation. If a general rail has a weight of 12-22 kg / m, one is 3 m or 5 m long, and this is used for a laying machine traveling stroke of about 25 m, for example, 5 to 8 on one side Must be installed during installation.

  This rail mounting operation is laborious due to the weight of the rail, and the rail cost for the entire process of running the laying machine is not low. In view of such circumstances, the present invention proposes a concrete laying formwork in which rail mounting work is easier than before and the cost can be suppressed.

  In order to solve the above problems, the concrete laying form proposed here is a contact surface portion with concrete, and is extended to the back side of the corresponding contact surface portion and fixed to the roadbed. And a plurality of rod-shaped members that are erected in a row in the extending direction of the contact surface portion on the upper surface of the support portion, and are formed between the contact surface portion and the rod-shaped member. A rail is held between the contact surface portion and the rod-like member with a predetermined interval.

  If the rail attached to the concrete laying formwork is restricted from moving in the left-right direction, some movement in the vertical direction is allowed. Focusing on this, the concrete laying formwork according to the present proposal sandwiches the rail between the abutment surface portion and the rod-like member to restrict the movement in the left-right direction, and supports the rail on the upper surface of the support portion in the up-down direction. I am going to do it. Therefore, the rail mounting operation can be a simple operation of dropping the rail from above between the contact surface portion and the rod-shaped member.

  And since the rail is only dropped from above between the contact surface portion and the rod-like member, a construction method is possible in which the rail where the laying machine has finished running is removed and reused at the point where the laying machine runs. . That is, for example, if two rails each having a predetermined length such as 3 m or 5 m as described above are prepared, the entire travel of the laying machine can be covered. Therefore, it contributes to cost reduction.

  FIG. 1 is a perspective view showing an embodiment of a concrete laying formwork.

  This concrete laying formwork is erected along the both sides of the pavement width and extends to the contact surface part 1 with the concrete and the back side of the corresponding contact part 1 (opposite to the concrete placing side). And a support portion 2 that is fixed to the roadbed and supports from the back side so that the contact surface portion 1 is not displaced from the installation position. The mold of this embodiment is formed using angle steel (L-shaped cross section), one side of which is a contact surface portion 1 and the other side is a support portion 2.

  The support portion 2 is welded with a grooved steel (a U-shaped cross section) with its opening facing down to form a large number of ribs 2a. That is, the grooved steel constituting the rib 2a is welded so that the axial direction thereof is orthogonal to the extending direction (arrow X) of the contact surface portion 1, and supports the upright contact surface portion 1 from the back surface. Yes.

  In the support portion 2 of the present embodiment, the upper surface of the support portion is the upper surface of the rib 2a, and the rod-like member 3 is erected on the upper surface of the rib 2a. The rod-like members 3 may be provided on the upper surfaces of all the ribs 2a, but every other rod-like member 3 as shown in the figure, or every two, or every three, as the case may be. The plurality of rod-like members 3 are erected so as to be in a line (a displacement of several mm to several cm is allowed) in the extending direction of the abutment surface portion 1, and the abutment surface portion 1 and the rod-like member 3. The space | interval which can insert the rail 4 is opened between.

  In this embodiment, a straight pipe made of vinyl chloride is used for the rail 4 held between the contact surface portion 1 and the rod-shaped member 3. However, the present invention is not limited to this, and other resin straight pipes and rod-shaped materials (column materials), or metal straight pipes, rod-shaped materials, and wooden rod-shaped materials (both may have a circular cross section and a square cross section). Can be used). From the standpoint of lightness, strength, and cost, it is suitable to use a resin straight pipe as the rail 4. The rail 4 uses a resin straight pipe having a predetermined length, for example, a length of 3 m to 5 m, and is reused as described later.

  The rod-like member 3 can be erected on the upper surface of the rib 2a by welding or the like, but as shown in the end view of FIG. 2, a pin member for fixing the mold frame to the roadbed is a rod-like member. 3 can be used. The pin member 3 is an iron pin for fixing a formwork that is vertically driven through the support portion 2 where the rib 2a is formed and is driven into the roadbed. In the case of this embodiment, the pin member 3 The head protruding from the upper surface of the rib 2a is used as a rod-shaped member. Thereby, member cost can be reduced.

As shown in FIG. 2, wheels 11 of a laying machine 10 such as a concrete finishing machine (scaffolding car, etc.) are placed on the rail 4 held by the formwork. The wheel 11 has a door shape with flanges formed on both sides, and the rail 4 is such that the wheel 11 is difficult to remove. For example, when the rail 4 is a circular tube or a cylinder, assuming that the rail diameter (outer diameter) is φ, the diameter is calculated as φ = t + (W ² / 4t) ± α. In the formula, t is the depth of the groove of the wheel 11, W is the width of the groove, and α is 0 to W / 5. Further, when the rail 4 is of a square tube or a prism, the width of one side of the rail cross section (the width of the surface in contact with the wheel 11) should not exceed W.

  When actually installing the formwork at the site, a plurality of formwork as shown in FIG. 1 are connected in the extending direction of the contact surface portion 1. The rails 4 do not have to be attached over the entire length of the plurality of molds connected to each other, and at least two rails having a length of about 3 m that are easy to handle may be prepared. That is, in the installed formwork, two rails 4 are held side by side in the extending direction of the contact surface portion 1 between the contact surface portion 1 and the rod-shaped member 3 at the initial position where the laying machine 10 starts to travel (paving). Per side). The mounting operation of the rail 4 can be performed manually by using a resin straight pipe as the rail 4. And the wheel 11 of the laying machine 10 is mounted on the first rail 4, and construction is started. When the laying machine 10 has finished running on one rail 4, the rail 4 that has finished running is removed, and the removed rail 4 is attached once again after the succeeding rail 4 on which the laying machine 10 is currently running. . The operation can also be performed manually, and by repeating this operation, the two rails 4 on one side can be reused to complete the work.

  FIG. 3 is an end view corresponding to FIG. 2 showing another embodiment of a concrete laying formwork.

  The formwork of FIG. 3 is different from the embodiment of FIG. 2 in the contact surface portion and the support portion. That is, the said formwork is formed using the H-section steel, The one flange part is the contact surface part 1, the other flange part 2a, and the web part 2b between these are the support parts 2. Yes. In the case of the present embodiment, the upper surface of the web portion 2b is the upper surface of the support portion 2, and a bar-like member 3 similar to the embodiment of FIGS. 1 and 2 is erected on the upper surface of the support portion 2. That is, the rod-shaped member 3 utilizes the head of the pin member 3 that penetrates the web portion 2b up and down and is driven into the roadbed. The rail 4 held between the rod-shaped member 3 and the contact surface portion 1 is the same as that in the embodiment of FIGS.

The perspective view which showed 1st Embodiment of the formwork for concrete laying. The end view of the concrete laying formwork of a 1st embodiment. The end view which showed 2nd Embodiment of the formwork for concrete laying.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Contact surface part 2 Support part 3 Bar-shaped member (pin member)
4 rails

Claims (4)

A contact surface portion with concrete,
A support portion that extends to the back side of the contact surface portion and is fixed to the roadbed, and supports the contact surface portion from the back side;
A plurality of rod-like members erected in a row in the extending direction of the contact surface portion on the upper surface of the support portion;
Comprising
A concrete laying form, characterized in that there is a predetermined interval between the contact surface portion and the rod-shaped member, and a rail can be held between the contact surface portion and the rod-shaped member. .   2. The concrete laying die according to claim 1, wherein a head of a pin member that penetrates the support portion and is driven into the roadbed is used as the rod-shaped member to fix the support portion to the roadbed. frame.   The concrete laying form according to claim 1 or 2, wherein the rail is a straight pipe.   4. The concrete laying form according to claim 3, wherein the rail is made of resin.

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