JPS5842416A - Concrete formwork for underground buried sink - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mold for forming a stationary hand hole.

Conventionally, in the connection part g2 of a duct of an underground cable such as an underground electric wire or an underground communication line, an open no-end hole is buried underground for connection. When molding a hand hole, assemble the box-shaped inner frame on the ten sides of the base plate in the opposite direction, assemble the outer frame on the other side of the inner frame, fill it with concrete, and remove the mold. When doing so, the outer frame was removed and the inner frame was removed by turning it in the opposite direction (2), which required time and effort to assemble and remove the mold. Therefore, the applicant developed a mechanism in which the inner frame is joined at the four corners and the inner frame on each four sides is pushed inward by operating a lever before being removed from the mold. However, in this formwork, there are dots at the joints on each of the four sides of the inner frame, and since the side frames on each four sides are folded inward by operating the lever, it is time-consuming and causes play in the lever hinge. The purpose of the present invention is to solve the wiring defect (X). : Concrete 1 formwork that is pivotally attached to the underframe and guides the rod back and forth from the inside into the gap between the @L sub-formwork joints, and there is no looseness etc. at the joints of the internal formworks. It is characterized by facilitating assembly and demolding of the formwork by guiding four sets of wedge-shaped rods forward and backward f2 by the rotation of the screw provided at the center position, without causing any ㅅ Below, the present invention will be explained in detail with reference to embodiment figures.
) A square-shaped stand with a square hole for medium heat (base 2 is fixed to the bottom surface of 1, a hinge 3 is provided at the upper center of the outer surface of the base 2, and a receiver 4 is provided at the lower end of the outer surface). 'Fj4 is vertically protruded and reinforcement 4F!5 is attached to the upper 1'':la of the front outer frame a a It is placed on the top surface at a position midway between the inner edge and outer edge of the file 1, and both end surfaces are joined.
The lower I/W outer side of the vertical reinforcing coil 7 attached to the outer surface of each outer frame is pivotally connected to each hinge 3, and the fastening metal fitting 8 is attached to the upper joint part 414 of the valley outer frame. 2, four corners j: four sets of L-shaped first pillars 9a1, second pillars 9b,
A third support 9c1 and a fourth support 9d are provided protrudingly, and the upper ends of each support are lower than the upper end of the outer frame by an amount outside the wall thickness of the bottom plate of the box, and a rectangular frame 10 is connected in series within the upper end 41111. In addition, the lower surface of the upper floor board 12 with chamfered corners 11 [four sets of arm rods 13 that meet the inner surface of the four corners of the rectangular formwork 10 at the upper end of the two-pronged column are diagonally protruded downward from the center, and have screw bearings 14 at the tips. fixed,
The arm rods 13 are placed in a pigsty in the square shape 10, and the upper end of each pillar (the upper floor slab 12 is removably mounted), and the inner edge 4 (4) of the base plate 1 is
) Vertical chamfers 16 are provided at the corners of the first inner frame 15a, the second inner frame 15b, the third inner frame 15c, and the fourth inner frame 15d, which have a shape in plan view that fits in the corner, and the upper end f2 of the upper floor slab 12. An L shape has an inclined surface 17 that joins two chamfered IHs, and its upper end is fixed to a horizontal support rod 18 fixed to the lower position of the inner surface of the valley frame.
The sub-rods 19 are pivoted to the hinges 20 at the four inner corners of the base 2 so that each inner frame can be tilted toward the center of the inner four corners of the base 41112+, and the inner frames are attached to opposite end surfaces of the inner frames. A tapered rod 21 that expands inward is provided, and four sets of first wedge-shaped rods 22a1, second model rods 22b1, and third sleeves are provided at the center of the four inner edges of the base plate 1 to fit into the model gaps at both ends of each inner frame. Mold rod 2
2C1 4th wedge-shaped rod 22d is arranged, the lower end of each wedge-shaped rod is bent in two directions to the base plate, and the screws 1llI on the lower surface of the upper floor plate 12 mounted on one end of the four sets of columns are attached. Screw i in 14
Screw in the upper end of ll+23, and screw in the screw 1ll11.
Loosely fit the lower part 11 of 23 into the body part and screw the spacer 24 with the screw 1l.
The upper and lower flanges 25, 25" fixed to the tllll 23 are fixed, and one end is loosely attached to the center position inside each wedge-shaped rod. The other end of the telescopic adjustment arm rod 26 is attached to the spacer 24 in an inclined manner. In the figure, 28 indicates concrete.Next, the effects of the present invention will be explained with reference to the drawings of embodiments shown in C2.

When forming a concrete hand hole using the concrete 1 and formwork 27 according to the present invention, insert a monkey spanner or the like from the underside of the base 2 and rotate the screw shaft 23 in the forward direction to form the screw bearings 1 and 1. When the telescopic adjustment arm rod 26 is engaged with the screw shaft 2: (71) and the legs are opened in the vertical direction, each of the four sets of 1st to 4th FF type rods 22a, 22b, 2
When 2c and 22d are advanced, four sets of first to fourth inner frames 15a, 15b, +5c, which are joined to both sides of each wedge-shaped rod,
While the tapered surfaces 21 at both ends of 15d are pressed by wedge-shaped rods, each inner frame is guided to stand up in the four corner directions centering on the hinge 20 of the L sub-rod 19, and the inner frame of the valley is moved to the base 4F1. The upper end inclined surface 7 stands perpendicularly to the inner edges of the four corners of I and is joined to the four side chamfers 11 of the upper floor board 12, and the outer surface of the valley model rod also becomes the same surface as the outer surface of the inner frame, and the upper floor board 12 is also pulled downward. It is designed to fit closely to the rectangular formwork at the upper end of the column. Next, each evening 1 son 6a, 6b, 6c
, 6d are vertically raised and rotated around the hinge 3 of the base frame 2, and the respective joints are connected with the fastening fittings 8 to assemble (r). Concrete 1 and 28 are filled and solidified.The interval between each inner frame and outer frame is such that the side wall of the hand hole is
? 15 is for forming the bottom plate. Next (double-sided concrete/When demolding concrete, each outer frame G t
y, G b, (i c, 6 d flIa
Disengage the M-shaped fastening fittings 8 and turn them outward around the hinges 3 of the base frame 2, and then rotate the screw shaft 23 inside the inner frame in the opposite direction to lower the screw shaft 23. Then, each of the extendable and retractable fl1 arm levers 26 descends f2, and each of the four sets of wedge-shaped rods 2
2a, 221], 22c, and 22d are pulled diagonally downward inward and retracted one bar, and winch the solidified concrete with the lower part of each wedge-shaped rod remaining partially in the gap between the tapered surfaces 21 of each inner frame. When the mold is removed upwards with a tool such as 1r, the adhesion force of the concrete causes it to rise slightly to the upper pressure plate 12 and form a shell 111.
At the same time, the adhesion pressure of concrete acts on the outer surface of each inner frame 15a, 1(7) 5b, 15c, +5d, and each inner frame is radially symmetrical in the screw direction with the hinge 20 of the L sub-rod 19 as the center. It is designed to easily demold concrete by tilting and contracting.

Therefore, in the present invention, by forward and reverse rotation of the screw shaft 2; 1, the raising and closing of the inner frame and the closing and retracting of the inner frame can be efficiently done with one touch. mutual,
In addition, since the joint with the upper pressure plate is straight, it is easy to manufacture, and there is no play in the joint, and labor-saving can be achieved by semi-automating the forming work of the open block manhole. It has the remarkable effects mentioned above.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway plan view of concrete 1 and formwork according to an embodiment of the present invention, a sectional view of the second Md along the line A-A, and FIG. 3 is a partially enlarged sectional view taken along the line A-A. Figure 4 is Figure 4C-C
5 is a sectional view taken along line C-C in FIG. 4, FIG. 6 is a sectional view taken along line C-C in FIG. 4, and FIG.
0-line sectional view, Figure 8 1 (8) Partially enlarged plan view showing the intraoral frame, Figure 9 is Figure 8 TI
Figure 10 is a plan view of the ten-bed slab, and Figure 11 is a perspective view of the concrete formwork.゛"+l, g.

Claims (1)

[Scope of Claims] 1. A base plate 2 is installed on the lower surface of a table plate 1 having a square hole drilled in a medium heat, and a base plate 2 is installed on the soil surface at a position midway between the outer edge and the inner edge of the plate plate 1. 1r of 4 sets of glue attached to the outer surface of the four sides
! It can be assembled and erected so that it can move freely from the four inner corners of the base.
Four sets of mold-shaped pillars are erected radially toward the center of the base, and the upper ends of each pillar are attached to the outer frame.
- A rectangular frame is connected to the upper end of the base plate 12 at a lower position corresponding to the thickness of the bottom plate of the 1 Th1 body, and an arbitrary number of arm rods are installed downward from the center on the lower surface of the upper floor plate 12 with chamfered four sides and four corners. A screw bearing is fixed to the tip by protruding in one direction, and the valley arm rod is attached to the rectangular formwork at the upper end of the column, and a 2-bed slab + 2 is removably mounted on the upper end of the column. Inner edge four corners C''--Mating and same C-
Four sets of inner frames 15a, J5b', +5c, 15 each having a shape in plan view whose upper ends can be joined to the four corners of the upper floor board 12.
d is pivotally attached to the four corners of the inner surface of the base 2 via an L-shaped rod, and into the valley (1) there is a tapered surface 2I that expands in the inner direction on the opposing surfaces at both ends of the frame.
, and four sets of wedge-shaped rods 22 a + 221) + 22 c + are provided, and one pair is fitted in one direction gap at both ends of each inner frame.
Place l 2 d at the center of the four inner edges of the base plate 1,
Threaded bearing 14ζ screw on the bottom surface of double floor slab 12 111112
Screw in the lower part of the screw Ill 23 and connect the upper and lower surfaces with the flange of the screw shaft 23 between the spacer 24 and each wedge-shaped rod. Extend/contract i1. l,] Connected with the arm rod +! : Concrete formwork for underground trenches.