JPH0353848Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a formwork apparatus for concrete products that is particularly suitable for formwork used in the manufacture of various concrete products manufactured on production lines.

[Conventional technology]

Traditionally, formwork has been used to manufacture concrete products, such as culverts, side ditches, U-shaped ditches, etc., as well as sewage basins, water collection basins, other road accessories such as curb blocks and sidewalk blocks, and wave-dissipating blocks. It is manufactured using.

In addition, from the perspective of improving product productivity and maintaining a high level of quality control, each work process, such as pouring concrete products into formwork, curing/hardening work, and stripping work, is carried out within the factory. This is done through an integrated production line.

[Problem that the invention aims to solve] When manufacturing concrete products using formwork, fresh concrete is poured into the formwork and then stored in a fixed place to wait for the concrete to cure and solidify. I was doing stripping work.

Therefore, a certain place was required for the concrete to cure and harden. Furthermore, in order to carry out the subsequent stripping work, there are structural constraints such as a certain procedure for disassembling the formwork and the need to deploy the formwork in a certain direction, so it is necessary to have a large space in order to carry out the work safely and efficiently. was needed.

The present invention was developed in view of the above points, and aims to save space for storing formwork when curing and solidifying concrete, and also to provide a direction in which the formwork can be easily expanded during stripping. By making it possible to freely select and change the direction, the work efficiency of stripping work is improved and work safety and maintenance are ensured.

[Means to solve the problem]

The present invention employs a method of supporting and fixing the formwork on the top surface of the base so that it can rotate horizontally around a support shaft.

[Effect]

To perform stripping work on the formwork after pouring concrete, the formwork is rotated horizontally on the base around the support shaft, and the direction is freely changed by selecting the direction that is easy to develop. Regardless of the size of the place,
The formwork can be easily expanded and disassembled to perform stripping work for concrete products.

〔Example〕

The present invention will be described below with reference to the drawings, taking as an example a case where an underdrain is molded as a concrete product.

Reference numeral 1 denotes a formwork, and 2 a transfer pallet type base provided on the lower surface of the formwork 1 so that the formwork 1 is rotatably supported and fixed in the horizontal direction about a support shaft 3.

The base 2 is made of a steel material, for example, as shown in FIG. 3, in order to sufficiently withstand the load of concrete to be placed and to enable it to be transferred or transported on a conveyor 4 of a line installed in a factory. Vertical side portions 2a, 2a and horizontal side portion 2 arranged vertically and horizontally using
b, 2b, and middle girders 2c, 2c, which are constructed in parallel in sets of two according to the number of installed formworks 1 between the front and rear horizontal sides 2b, 2b, are welded to have a substantially rectangular overall shape. It is formed by doing etc.

The support shaft 3 is preferably located at approximately the center of gravity of the formwork 1 and protrudes vertically from the lower surface of the bottom of the formwork 1.
The formwork 1 is rotatably inserted onto the base 2 by loosely inserting it into the receiving tube 5 fixed at approximately the center position of the middle girders 2c, 2c of one set through the countersunk washer 6 as a bearing material. are doing.

The formwork 1 is composed of a substantially rectangular parallelepiped outer frame body 7 that can be expanded to facilitate assembly and disassembly, and an inner frame body 8 that is housed and attached to the outer frame body 7 so as to be freely inserted into and removed from the frame body 7. In this embodiment, a formwork 1 for forming an underdrain as a concrete product is shown, but the formwork is not limited to this, and various forms can be considered depending on the concrete product to be formed.

The outer frame body 7 includes a bottom plate 7a, a front plate 7b and a rear plate 7c which are pivotally attached to the four sides of the bottom plate 7a using several hinges 9 so as to be expandable, left and right side plates 7d,
7d.

In addition, the inner frame body 8 has a main body part 8a formed by bending a plate material into a substantially inverted U-shape on the side surface, and the main body part 8a is attached to the front plate 7b.
It is inserted freely into and out of an opening _7b1 that is slightly larger than a and has a similar shape. In this case, the inner frame 8 is inserted into the main body 8 in order to smoothly slide in and out of the opening _7b1 during concrete pouring and stripping.
A is divided into left and right halves on the center bisector M, divided into left and right divided constituent pieces 8a ₁ and 8a 1, and these divided constituent pieces 8a ₁ and _{8a 1 are} installed in the axial direction within the main body 8a. pantograph-type links 12a, 12b, 12c, which expand and contract by the feeding action of nuts 11, 11 screwed onto the operating bolt 10;
12d, 12a, 12b, 12c, 12d so that the links 12b, 12d, 12b,
Telescoping links 14, 14, 1 have one end pivotally connected to 12d via a universal joint 13 and the other end pivotally connected to the inner wall of the divided component pieces 8a ₁ , 8a ₁ .
4 and 14 so that it can be expanded and contracted.

The left and right side plates 7d, 7d can be attached to the front plate 7b and rear plate 7c of the outer frame 7 by, for example, opposing mounting pieces 15, 15, 15, 15 provided on one side of the upper part of the front plate 7b and rear plate 7c. Locking hole 1 provided in
Clamp mechanism 1 in which a mounting shaft 16 provided at an eccentric position in 5a, 15a, 15a, 15a can be freely engaged and detached
7, 17 are pivotally attached to one side by a movable shaft 18, and the ends of the connecting rods 19, 19 are pivotally attached to the connecting shaft 20 via opposing mounting pieces 20a, 20a, thereby assembling the formwork 1. At the same time, by rotating the clamp mechanisms 17, 17 about the mounting shafts 16, 16,
The movable shaft 18 connects the connecting shaft 20 of the connecting rod 19 and the mounting shaft 1
6, the clamping mechanism 17 is quickly tightened or released, and the side plate 7 is tightened against the front plate 7b and the rear plate 7c.
d and 7d can be assembled and fixed, or unassembled and expanded (see Figure 4).

In addition, to fix or release the front plate 7b, rear plate 7c, and side plates 7d, 7d to the base 2, attach the mounting shafts 21a to the mounting pieces 21, 21 facing each other at the tips of the base 2. Several connecting rods 22 pivoted to 2
A clamp mechanism 17' having the same structure as the clamp mechanism 17 is connected to the proximal end of the clamp mechanism 17 by a movable shaft 25, and a mounting shaft 23, 23 is provided at an eccentric position so as to protrude outward. 24
The mounting shaft of the clamp mechanism 17' that is engaged in the engagement grooves 24a, 24a is removably engaged and rotatably mounted in the engagement cutout holes 24a, 24a. By rotating around 23, 23, the mounting shaft 21a of the connecting rod 22
The movable shaft 25 runs on an extension of the line connecting the mounting shaft 23 and the mounting shaft 23.
By passing over the base plate 7a, the connecting rods 22, 22 can be tightly fixed and fixed between the base 2 and the front plate 7b, rear plate 7c, and side plates 7d, 7d assembled on the bottom plate 7a, or released. I'm starting to do that.

The inner frame 8 can be assembled or disassembled with respect to the outer frame 7 by inserting and removing the inner frame 8 through an opening _7b1 provided in the front plate 7b of the outer frame 7.
At this time, when the inner frame body 8 is divided into two along the center bisector M as shown in FIG. , 11, and one end of which is connected to the nuts 11, 11.
2a, 12b, 12c, 12d and link 1
4, 14, 14, 14 are expanded and contracted to form the divided component piece 8.
If a ₁ and 8a ₁ are alternately expanded and contracted in the left and right directions with respect to the center bisector M, and the diameter of the inner frame 8 is made smaller, the inner frame 8 can freely pass through the opening 7b _{1 and} be pulled out. Differences can be easily made.

Furthermore, the inner frame body 8 is fixed to the outer frame body 7,
Fixing the outer frame 7 to the base 2 can be easily achieved by using a clamp mechanism and a connecting rod having the same structure as the connecting rods 19, 22 and clamp mechanisms 17, 17'.

One embodiment of the present invention has the above-mentioned configuration, and in order to manufacture a concrete product, concrete is poured between the outer frame 7 and the inner frame 8 of the assembled formwork 1. At this time, the formwork 1 is placed and fixed on the top surface of the base 2 on the conveyor 4 of the lane, so that it is transported integrally with the base 2 by means of conveyance such as the conveyor 4. Therefore on the line,
By sequentially transporting the formwork 1 placed on the base 2, concrete pouring work can be carried out continuously and efficiently. At this time, since the formwork 1 is placed and fixed on the top surface of the base 2 to protect the formwork 1, the concrete may crack when being transported by the conveyor 4 or lifted by a crane etc. even during concrete pouring. This prevents damage or damage.

After the concrete is poured, the formwork 1 is stacked in multiple tiers in a fixed place, such as a curing room, in an orderly manner for curing and solidification, in order to utilize the space. It is scaled, cured, and hardened. At this time, the formwork 1 stacked in multiple stages is dispersed by the base 2 and does not receive any direct load, so that cracks and the like do not occur.

The formwork 1 after curing and solidification is lowered by a fork, a crane, or the like, and is transferred to a fixed location in the latter stage by a conveyor 4 or the like, where stripping work is performed.

To do this, when the clamping mechanism 17' is released and the outer frame 7 is released from the base 2, the form 1 becomes rotatable relative to the base 2 about the support shaft 3. Therefore, the direction in which it is easy to peel off the formwork 1, that is, the direction in which the outer formwork 7 is developed and the direction in which the inner formwork 8 is pulled out relative to the outer formwork 7, is set in a direction that is easy to peel off, regardless of whether there is a narrow space such as an obstacle. Since the choice can be made by rotating around the support shaft 3 according to the situation, the stripping work can be performed safely and efficiently. At this time, if a plurality of formworks 1 are installed on the base 2 as shown in Fig. 6, by rotating each formwork 1 in the required direction, the order of stripping Regardless of the situation, there is no inconvenience such as the intermediate formwork 1 being unable to be expanded due to the inability to secure a space between the adjacent formworks 1 before and after it, making it impossible to carry out stripping work, and moreover, it is possible to prevent the concrete product from being inconvenient. Peeling work can be easily and reliably performed without causing damage.

In each of the embodiments described above, the base 2 is of a transport pallet type that is transported by a conveyor 4, but the base 2 may be provided with several wheels to enable cargo transportation.

[Effect of idea]

As mentioned above, the present invention saves space for storing formwork when curing and solidifying concrete by stacking it in multiple tiers, and also makes it easier to unfold the formwork during stripping. Since the direction can be changed freely by selecting the direction, the formwork can be expanded freely without being restricted by the size of the space, etc., which improves the work efficiency of stripping work and improves work safety and maintenance. It is measured.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing one embodiment of the present invention;
The figure is a side view of the state in which it is being transferred on a line conveyor, Figure 3 is an exploded slope view, Figure 4 is a side view of the clamp mechanism that constitutes this embodiment, Figure 5 is a plan view,
FIG. 6 is a plan view for explaining a state in which a plurality of formworks are mounted on a base. 1...Formwork, 2...Base, 3...Spindle, 5...
Receiving tube, 7...outer frame body, 8...inner frame body.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A formwork device for concrete products characterized by supporting and fixing a formwork on the top surface of a base so that it can rotate horizontally around a support shaft. (2) The formwork device for concrete products according to claim 1, wherein a plurality of the formworks are provided on the upper surface of the base. (3) The formwork apparatus for concrete products according to claim 1, wherein the base is a transfer pallet that is conveyed on a line.